Okay, the basic difference at the machine is that double precision uses twice as many bits as single. In the usual implementation,that's 32 bits for single, 64 bits for double.

But what does that mean? If we assume the IEEE standard, then a single precision number has about 23 bits of the mantissa, and a maximum exponent of about 38; a double precision has 52 bits for the mantissa, and a maximum exponent of about 308.

The details are at Wikipedia, as usual.

I was wondering about this specifically for building software in Debian (the installed Debian system can be a 32-bit version with a 32 bit kernel, libraries, etc., or it can be a 64-bit version with stuff compiled for the 64-bit rather than 32-bit compatibility mode).

Debian packages themselves need to know what architecture they are for (of course) when they actually create the package with all of its metadata, including platform architecture, so there is a packaging tool that outputs it for other packaging tools and scripts to use, called dpkg-architecture. It includes both what it's configured to build for, as well as the current host. (Normally these are the same though.) Example output on a 64-bit machine:

DEB_BUILD_ARCH=amd64
DEB_BUILD_ARCH_OS=linux
DEB_BUILD_ARCH_CPU=amd64
DEB_BUILD_GNU_CPU=x86_64
DEB_BUILD_GNU_SYSTEM=linux-gnu
DEB_BUILD_GNU_TYPE=x86_64-linux-gnu
DEB_HOST_ARCH=amd64
DEB_HOST_ARCH_OS=linux
DEB_HOST_ARCH_CPU=amd64
DEB_HOST_GNU_CPU=x86_64
DEB_HOST_GNU_SYSTEM=linux-gnu
DEB_HOST_GNU_TYPE=x86_64-linux-gnu

You can print just one of those variables or do a test against their values with command line options to dpkg-architecture.

I have no idea how dpkg-architecture deduces the architecture, but you could look at its documentation or source code (dpkg-architecture and much of the dpkg system in general are Perl).

All of the following assume that your cursor is on the first line:

Using normal mappings:

3Shift+J

Using Ex commands:

:,+2j

Which is an abbreviation of

:.,.+2 join

Which can also be entered by the following shortcut:

3:j

An even shorter Ex command:

:j3

To the top voted answer. I prefer passing by rvalue reference.

I understand what's the problem about passing by rvalue reference may cause. But let's divide this problem to two sides:

• for caller:

I must write code Base newBase(std::move(<lvalue>)) or Base newBase(<rvalue>).

• for callee:

Library author should guarantee it will actually move the unique_ptr to initialize member if it want own the ownership.

That's all.

If you pass by rvalue reference, it will only invoke one "move" instruction, but if pass by value, it's two.

Yep, if library author is not expert about this, he may not move unique_ptr to initialize member, but it's the problem of author, not you. Whatever it pass by value or rvalue reference, your code is same!

If you are writing a library, now you know you should guarantee it, so just do it, passing by rvalue reference is a better choice than value. Client who use you library will just write same code.

Now, for your question. How do I pass a unique_ptr argument to a constructor or a function?

You know what's the best choice.

http://scottmeyers.blogspot.com/2014/07/should-move-only-types-ever-be-passed.html

It should be in %USERNAME%. Obviously this can be easily spoofed, so don't rely on it for security.

Useful tip: type set in a command prompt will list all environment variables.

If I understand you correctly, You have two folders, one houses your php script that you want to include into a file that is in another folder?

If this is the case, you just have to follow the trail the right way. Let's assume your folders are set up like this:

root
    includes
        php_scripts
            script.php
    blog
        content
            index.php

If this is the proposed folder structure, and you are trying to include the "Script.php" file into your "index.php" folder, you need to include it this way:

include("../../../includes/php_scripts/script.php");

The way I do it is visual. I put my mouse pointer on the index.php (looking at the file structure), then every time I go UP a folder, I type another "../" Then you have to make sure you go UP the folder structure ABOVE the folders that you want to start going DOWN into. After that, it's just normal folder hierarchy.

You could use "Test Mail Server Tool" to test email sending on your machine or localhost. Google and Download "Test Mail Server Tool" and set it up.

Then in your settings.py:

EMAIL_BACKEND= 'django.core.mail.backends.smtp.EmailBackend'
EMAIL_HOST = 'localhost'
EMAIL_PORT = 25

From shell:

from django.core.mail import send_mail
send_mail('subject','message','sender email',['receipient email'],    fail_silently=False)

dir, err := os.Getwd()
    if err != nil {
        fmt.Println(err)
    }

this is for golang version: go version go1.13.7 linux/amd64

works for me, for go run main.go. If I run go build -o fileName, and put the final executable in some other folder, then that path is given while running the executable.

List<int> list = new List<int> { 5, 7, 3 };  
list.Sort((x,y)=> y.CompareTo(x));  
list.ForEach(action => { Console.Write(action + " "); });

Found it!

Change host: localhost in config/database.yml to host: 127.0.0.1 to make rails connect over TCP/IP instead of local socket.

development:
  adapter: mysql2
  host: 127.0.0.1
  username: root
  password: xxxx
  database: xxxx

Here's a trimmed down ECMAScript 6 version:

const convert = {
  bin2dec : s => parseInt(s, 2).toString(10),
  bin2hex : s => parseInt(s, 2).toString(16),
  dec2bin : s => parseInt(s, 10).toString(2),
  dec2hex : s => parseInt(s, 10).toString(16),
  hex2bin : s => parseInt(s, 16).toString(2),
  hex2dec : s => parseInt(s, 16).toString(10)
};

convert.bin2dec('111'); // '7'
convert.dec2hex('42');  // '2a'
convert.hex2bin('f8');  // '11111000'
convert.dec2bin('22');  // '10110'

That worked

<audio src="${ song.url }" id="audio"></audio>
<i class="glyphicon glyphicon-play-circle b-play" id="play" onclick="play()"></i>

<script>
    function play() {
        var audio = document.getElementById('audio');
        if (audio.paused) {
            audio.play();
            $('#play').removeClass('glyphicon-play-circle')
            $('#play').addClass('glyphicon-pause')
        }else{
            audio.pause();
            audio.currentTime = 0
            $('#play').addClass('glyphicon-play-circle')
            $('#play').removeClass('glyphicon-pause')
        }
    }
</script>

using fn_my_permissions

EXECUTE AS USER = 'userName';
SELECT * FROM fn_my_permissions(NULL, 'DATABASE') 

This code will fail for circular reference:

    JSON.stringify(circularReference);
// TypeError: cyclic object value

Use the below code:

 const getCircularReplacer = () => {
  const seen = new WeakSet();
  return (key, value) => {
    if (typeof value === "object" && value !== null) {
      if (seen.has(value)) {
        return;
      }
      seen.add(value);
    }
    return value;
  };
};

JSON.stringify(circularReference, getCircularReplacer());

In a similar case, I wanted to avoid always calling addClass or removeClass due to performance issues. I've split the scroll handler function into two individual functions, used according to the current state. I also added a debounce functionality according to this article: https://developers.google.com/web/fundamentals/performance/rendering/debounce-your-input-handlers

        var $header = jQuery( ".clearHeader" );         
        var appScroll = appScrollForward;
        var appScrollPosition = 0;
        var scheduledAnimationFrame = false;

        function appScrollReverse() {
            scheduledAnimationFrame = false;
            if ( appScrollPosition > 500 )
                return;
            $header.removeClass( "darkHeader" );
            appScroll = appScrollForward;
        }

        function appScrollForward() {
            scheduledAnimationFrame = false;
            if ( appScrollPosition < 500 )
                return;
            $header.addClass( "darkHeader" );
            appScroll = appScrollReverse;
        }

        function appScrollHandler() {
            appScrollPosition = window.pageYOffset;
            if ( scheduledAnimationFrame )
                return;
            scheduledAnimationFrame = true;
            requestAnimationFrame( appScroll );
        }

        jQuery( window ).scroll( appScrollHandler );

Maybe someone finds this helpful.

Arrays.asList(factors) returns a List<int[]>, not a List<Integer>. Since you're doing new ArrayList instead of new ArrayList<Integer> you don't get a compile error for that, but create an ArrayList<Object> which contains an int[] and you then implicitly cast that arraylist to ArrayList<Integer>. Of course the first time you try to use one of those "Integers" you get an exception.

For VS 2013, .NET Framework 4.5.1 also has a AccessViolationException bug (KB2915689) when dealing with SQL Server / TCP Sockets. Upgrading to .NET Framework 4.5.2 corrects this problem.

Reported VS.NET AccessViolationException

Attempted to read or write protected memory. This is often an indication that other memory is corrupt.

If you are already in a REPL window and don't see the welcome message with the version number, you can use help() to see the major and minor version:

>>>help()
Welcome to Python 3.6's help utility!
...

The source comment added to NonLocalizedLabel directs us now to:

return context.getPackageManager().getApplicationLabelFormatted(context.getApplicationInfo());

make a constraints to Top Layout like this

Do this:

<video style="display:block; margin: 0 auto;" controls>....</video>

Works perfect! :D

I had exactly the same problem. Database charset is utf-8 and collation is utf8_unicode_ci. I was able to see Unicode text in my webapp but the phpMyAdmin and sqldump results were garbled.

It turned out that the problem was in the way my web application was connecting to MySQL. I was missing the encoding flag.

After I fixed it, I was able to see Greek characters correctly in both phpMyAdmin and sqldump but lost all my previous entries.

if ($done)
{
    header("Location: /url/to/the/other/page");
    exit;
}

Also make sure your code doesn't have true for setBlockNetworkLoads

webView.getSettings().setBlockNetworkLoads (false);

Adding this view; that draws a separator between your textviews

<View
    android:layout_width="match_parent"
    android:layout_height="1dp"
    android:background="#000000" />

Try this:

Calendar calendar = Calendar.getInstance();
calendar.setTime(yourdate);
int hours = calendar.get(Calendar.HOUR_OF_DAY);
int minutes = calendar.get(Calendar.MINUTE);
int seconds = calendar.get(Calendar.SECOND);

Edit:

hours, minutes, seconds

above will be the hours, minutes and seconds after converting yourdate to System Timezone!

<?php
//
// A very simple PHP example that sends a HTTP POST to a remote site
//

$ch = curl_init();

curl_setopt($ch, CURLOPT_URL,"http://xxxxxxxx.xxx/xx/xx");
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS,
            "dispnumber=567567567&extension=6");
curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-Type: application/x-www-form-urlencoded'));


// receive server response ...
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

$server_output = curl_exec ($ch);

curl_close ($ch);

// further processing ....
if ($server_output == "OK") { ... } else { ... }

?>

Windows Mail seemed to outright ignore inline text-decoration tag but what fixed it for me was by adding this to the head:

<!--[if (mso)|(mso 16)]>
<style type="text/css">
    body, table, td, a, span { font-family: Arial, Helvetica, sans-serif !important; }
    a {text-decoration: none;}
</style>
<![endif]-->

While the above answer is 100% helpful and correct, I'd like to add the following since only a combination of the above answer and reading through the pandas doc helped me:

2-digit / 4-digit year

It is noteworthy, that in order to parse through a 2-digit year, e.g. '90' rather than '1990', a %y is required instead of a %Y.

Infer the datetime automatically

If parsing with a pre-defined format still doesn't work for you, try using the flag infer_datetime_format=True, for example:

yields_df['Date'] = pd.to_datetime(yields_df['Date'], infer_datetime_format=True)

Be advised that this solution is slower than using a pre-defined format.

This is a pretty old thread, but there is a work-around solution now, which may not have been in BeautifulSoup at the time.

Here is an example of what I did. I use the "requests" module to read an RSS feed and get its text content in a variable called "rss_text". With that, I run it thru BeautifulSoup, search for the xpath /rss/channel/title, and retrieve its contents. It's not exactly XPath in all its glory (wildcards, multiple paths, etc.), but if you just have a basic path you want to locate, this works.

from bs4 import BeautifulSoup
rss_obj = BeautifulSoup(rss_text, 'xml')
cls.title = rss_obj.rss.channel.title.get_text()

Git just stores the contents of the link (i.e. the path of the file system object that it links to) in a 'blob' just like it would for a normal file. It then stores the name, mode and type (including the fact that it is a symlink) in the tree object that represents its containing directory.

When you checkout a tree containing the link, it restores the object as a symlink regardless of whether the target file system object exists or not.

If you delete the file that the symlink references it doesn't affect the Git-controlled symlink in any way. You will have a dangling reference. It is up to the user to either remove or change the link to point to something valid if needed.

Try this :abc > myFile.txt First, it will create a file with name myFile.txt in present working directory (in command prompt). Then it will run the command abc which is not a valid command. In this way, you have gotten a new empty file with the name myFile.txt.

You're calling write_file with arguments like this:

write_file(foo, bar)

But you haven't defined 'foo' correctly, or you have a typo in your code so that it's creating a new empty variable and passing it in.

While many of the suggestions work when converting 2 -> 4 space. I ran into some issues when converting 4 -> 2.

Here's what I ended up using:

Sublime Text 3/Packages/User/to-2.sublime-macro

[
  { "args": null, "command": "select_all" },
  { "args": { "set_translate_tabs": true }, "command": "unexpand_tabs" },
  { "args": { "setting": "tab_size", "value": 1 }, "command": "set_setting" },
  { "args": { "set_translate_tabs": true }, "command": "expand_tabs" },
  { "args": { "setting": "tab_size", "value": 2 }, "command": "set_setting" }
]

For TypeScript users:

    toggle(event: Event): void {
        let elementId: string = (event.target as Element).id;
        // do something with the id... 
    }

You have to use the isomorphic-fetch module to your Node project because of Node does not contain Fetch API yet. for fixing this problem run below command:

npm install --save isomorphic-fetch es6-promise

After installation use below code in your project:

import "isomorphic-fetch"

Hope this answer helps you.

There is one event which is default associate with any webcontrol. For example, in case of Button click event, in case of Check box CheckChangedEvent is there. So in case of AutoPostBack true these events are called by default and event handle at server side.

Using .format from Python 2.6 and higher:

>>> print '{}{}{}{}'.format(*[7,7,7,7])
7777
>>> data = [7, 7, 7, 7] * 3
>>> print ('{}'*len(data)).format(*data)
777777777777777777777777

For Python 3:

>>> print(('{}'*len(data)).format(*data))
777777777777777777777777

This works for me on the device (not simulator). Make sure you add the systemconfiguration framework.

#import <SystemConfiguration/CaptiveNetwork.h>

+ (NSString *)currentWifiSSID {
    // Does not work on the simulator.
    NSString *ssid = nil;
    NSArray *ifs = (__bridge_transfer id)CNCopySupportedInterfaces();
    for (NSString *ifnam in ifs) {
        NSDictionary *info = (__bridge_transfer id)CNCopyCurrentNetworkInfo((__bridge CFStringRef)ifnam);
        if (info[@"SSID"]) {
            ssid = info[@"SSID"];
        }
    }
    return ssid;
}

What explanation do we attribute to the below

class BaseClass {

    public  void print() {
        System.out.println("In Parent Class , Print Method");
    }

    public static void display() {
        System.out.println("In Parent Class, Display Method");
    }

}


class DerivedClass extends BaseClass {

    public  void print() throws Exception {
        System.out.println("In Derived Class, Print Method");
    }

    public static void display() {
        System.out.println("In Derived Class, Display Method");
    }
}

Class DerivedClass.java throws a compile time exception when the print method throws a Exception , print () method of baseclass does not throw any exception

I am able to attribute this to the fact that Exception is narrower than RuntimeException , it can be either No Exception (Runtime error ), RuntimeException and their child exceptions

Configuration configManager = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
KeyValueConfigurationCollection confCollection = configManager.AppSettings.Settings;

confCollection["YourKey"].Value = "YourNewKey";


configManager.Save(ConfigurationSaveMode.Modified);
ConfigurationManager.RefreshSection(configManager.AppSettings.SectionInformation.Name);

It works for me:

>>> def pyth_test (x1, x2):
...     print x1 + x2
...
>>> pyth_test(1,2)
3

Make sure you define the function before you call it.

Perhaps this complementary example of "match" would be helpful.

Having two datasets:

first_dataset <- data.frame(name = c("John", "Luke", "Simon", "Gregory", "Mary"),
                            role = c("Audit", "HR", "Accountant", "Mechanic", "Engineer"))

second_dataset <- data.frame(name = c("Mary", "Gregory", "Luke", "Simon"))

If the name column contains only unique across collection values (across whole collection) then you can access row in other dataset by value of index returned by match

name_mapping <- match(second_dataset$name, first_dataset$name)

match returns proper row indexes of names in first_dataset from given names from second: 5 4 2 1 example here - accesing roles from first dataset by row index (by given name value)

for(i in 1:length(name_mapping)) {
    role <- as.character(first_dataset$role[name_mapping[i]])   
    second_dataset$role[i] = role
}

===

second dataset with new column:
     name       role
1    Mary   Engineer
2 Gregory   Mechanic
3    Luke Supervisor
4   Simon Accountant

r

You get undefined for the various scenarios:

You declare a variable with var but never set it.

var foo; 
alert(foo); //undefined.

You attempt to access a property on an object you've never set.

var foo = {};
alert(foo.bar); //undefined

You attempt to access an argument that was never provided.

function myFunction (foo) {
  alert(foo); //undefined.
}

As cwolves pointed out in a comment on another answer, functions that don't return a value.

function myFunction () {
}
alert(myFunction());//undefined

A null usually has to be intentionally set on a variable or property (see comments for a case in which it can appear without having been set). In addition a null is of type object and undefined is of type undefined.

I should also note that null is valid in JSON but undefined is not:

JSON.parse(undefined); //syntax error
JSON.parse(null); //null

you can use log4net.Filter.LevelMatchFilter. other options can be found at log4net tutorial - filters

in ur appender section add

<filter type="log4net.Filter.LevelMatchFilter">
    <levelToMatch value="Info" />
    <acceptOnMatch value="true" />
</filter>

the accept on match default is true so u can leave it out but if u set it to false u can filter out log4net filters

This solution uses the python function filter. This function creates a list of elements for which a function returns true. In this case, the anonymous function used is partial matching '.csv' on every element of the directory files list obtained with os.listdir('the path i want to look in')

import os

filepath= 'filepath_to_my_CSVs'  # for example: './my_data/'

list(filter(lambda x: '.csv' in x, os.listdir('filepath_to_my_CSVs')))

I think this is an even simpler example

List<String> emptyList = new ArrayList<>();
Optional<String> opt2 = emptyList.stream().findFirst();
assertThrows(NoSuchElementException.class, () -> opt2.get());

Calling get() on an optional containing an empty ArrayList will throw a NoSuchElementException. assertThrows declares the expected exception and provides a lambda supplier (takes no arguments and returns a value).

Thanks to @prime for his answer which I hopefully elaborated on.

The error SELF_SIGNED_CERT_IN_CHAIN means that you have self signed certificate in certificate chain which is basically not trusted by the system.

If that happens, basically something fishy is going on, therefore as people already commented, it is not recommended to just disable certificate checks, but better approach is to understand what is the problem and fix the cause of it.

This maybe related either to:

• custom repository address which doesn't have the right certificate,

• a corporate network with transparent proxy.

  If you're behind a corporate web proxy, you should set-up the proper HTTP_PROXY/HTTPS_PROXY environment variables or set them via npm:

    npm config set proxy http://proxy.company.com:8080
    npm config set https-proxy http://proxy.company.com:8080
  

  See: How to setup Node.js and Npm behind a corporate web proxy

If you trust the host, you can export the self-signed certificate from the chain and import them into system, so they're marked as trusted.

This can be achieved by checking the certificates by (change example.com into npm repo which is failing based on the npm-debug.log):

openssl s_client -showcerts -connect example.com:443 < /dev/null

then save the certificate content (between BEGIN and END) into .crt file in order to import it.

Linux

As per suggestion, you can add the below to the /etc/environment file (Node 7.4+) to export your CA chain, like:

NODE_EXTRA_CA_CERTS=/etc/pki/ca-trust/source/anchors/yourCer??ts.pem

CentOS

On CentOS 5 this can be appended into /etc/pki/tls/certs/ca-bundle.crt file, e.g.

ex +'g/BEGIN CERTIFICATE/,/END CERTIFICATE/p' <(echo | openssl s_client -showcerts -connect example.com:443) -scq | sudo tee -a /etc/pki/tls/certs/ca-bundle.crt
sudo update-ca-trust force-enable
sudo update-ca-trust extract
npm install

^{Note: To export only first certificate, remove g at the beginning.}

In CentOS 6, the certificate file can be copied to /etc/pki/ca-trust/source/anchors/.

Ubuntu/Debian

In Ubuntu/Debian, copy CRT file into /usr/local/share/ca-certificates/ then run:

sudo update-ca-certificates

macOS

In macOS you can run:

sudo security add-trusted-cert -d -r trustRoot -k /Library/Keychains/System.keychain ~/foo.crt

Windows

In Windows: certutil -addstore -f "ROOT" new-root-certificate.crt

See also: npm - Troubleshooting - SSL Error

You are probably looking for 'chr()':

>>> L = [104, 101, 108, 108, 111, 44, 32, 119, 111, 114, 108, 100]
>>> ''.join(chr(i) for i in L)
'hello, world'

I'm not sure it's a good idea to use a GoTo but if you do want to use it, you can do something like this:

Select Case parameter 
    Case "userID"
        ' does something here.
    Case "packageID"
        ' does something here.
    Case "mvrType" 
        If otherFactor Then 
            ' does something here. 
        Else 
            GoTo caseElse
        End If 
    Case Else
caseElse:
        ' does some processing... 
End Select

As I said, although it works, GoTo is not good practice, so here are some alternative solutions:

Using elseif...

If parameter = "userID" Then
    ' does something here.
ElseIf parameter = "packageID" Then
    ' does something here.
ElseIf parameter = "mvrType" AndAlso otherFactor Then
    ' does something here.
Else
    'does some processing...
End If

Using a boolean value...

Dim doSomething As Boolean

Select Case parameter
Case "userID"
     ' does something here.
Case "packageID"
     ' does something here.
Case "mvrType"
     If otherFactor Then
          ' does something here. 
     Else
          doSomething = True
     End If
Case Else
     doSomething = True
End Select

If doSomething Then
     ' does some processing... 
End If

Instead of setting a boolean variable you could also call a method directly in both cases...

I think this should work .. :)

<input type="checkbox" name="Days[]" value="Daily">Daily<br>
<input type="checkbox" name="Days[]" value="Sunday">Sunday<br>

Here is an example ...

select * from tablename where to_char(added_time, 'YYYY-MM-DD')  = to_char( now(), 'YYYY-MM-DD' )

added_time is a column name which I converted to char for match

At first you need to understand first, that Tomcat is a Java application. So, to see which java version Tomcat is using, you can just simply find the script file from which Tomcat is started, usually catalina.sh.

Inside this file, you will get something like below:

catalina.sh:#   JAVA_HOME       Must point at your Java Development Kit installation.
catalina.sh:#                   Defaults to JAVA_HOME if empty.
catalina.sh:  [ -n "$JAVA_HOME" ] && JAVA_HOME=`cygpath --unix "$JAVA_HOME"`
catalina.sh:  JAVA_HOME=`cygpath --absolute --windows "$JAVA_HOME"`
catalina.sh:    echo "Using JAVA_HOME:       $JAVA_HOME"

By default, JAVA_HOME should be empty, which mean it will use the default version of java, or you can test with: echo $JAVA_HOME

And then use "java -version" to see which version you default java is.

And vice versa by setting this property: JAVA_HOME, you can configure which Java version to use when starting Tomcat.

Here is my answer from a different question.

First you need to reference the Adobe Reader ActiveX Control

Adobe Acrobat Browser Control Type Library 1.0

%programfiles&\Common Files\Adobe\Acrobat\ActiveX\AcroPDF.dll

Then you just drag it into your Windows Form from the Toolbox.

And use some code like this to initialize the ActiveX Control.

private void InitializeAdobe(string filePath)
{
    try
    {
        this.axAcroPDF1.LoadFile(filePath);
        this.axAcroPDF1.src = filePath;
        this.axAcroPDF1.setShowToolbar(false);
        this.axAcroPDF1.setView("FitH");
        this.axAcroPDF1.setLayoutMode("SinglePage");
        this.axAcroPDF1.Show();
    }
    catch (Exception ex)
    {
        throw;
    }
}

Make sure when your Form closes that you dispose of the ActiveX Control

this.axAcroPDF1.Dispose();
this.axAcroPDF1 = null;

otherwise Acrobat might be left lying around.

only tab
rm -rvf /usr/local/go/
not works well, but
sudo rm -rvf /usr/local/go/
do.

Probably you have this:

const db = mongoose.connect('mongodb://localhost:27017/db');

// Do some stuff

db.disconnect();

but you can also have something like this:

mongoose.connect('mongodb://localhost:27017/db');

const model = mongoose.model('Model', ModelSchema);

model.find().then(doc => {
  console.log(doc);
}

you cannot call db.disconnect() but you can close the connection after you use it.

model.find().then(doc => {
  console.log(doc);
}).then(() => {
  mongoose.connection.close();
});

Well, I like MONEY! It's a byte cheaper than DECIMAL, and the computations perform quicker because (under the covers) addition and subtraction operations are essentially integer operations. @SQLMenace's example—which is a great warning for the unaware—could equally be applied to INTegers, where the result would be zero. But that's no reason not to use integers—where appropriate.

So, it's perfectly 'safe' and appropriate to use MONEY when what you are dealing with is MONEY and use it according to mathematical rules that it follows (same as INTeger).

Would it have been better if SQL Server promoted division and multiplication of MONEY's into DECIMALs (or FLOATs?)—possibly, but they didn't choose to do this; nor did they choose to promote INTegers to FLOATs when dividing them.

MONEY has no precision issue; that DECIMALs get to have a larger intermediate type used during calculations is just a 'feature' of using that type (and I'm not actually sure how far that 'feature' extends).

To answer the specific question, a "compelling reason"? Well, if you want absolute maximum performance in a SUM(x) where x could be either DECIMAL or MONEY, then MONEY will have an edge.

Also, don't forget it's smaller cousin, SMALLMONEY—just 4 bytes, but it does max out at 214,748.3647 - which is pretty small for money—and so is not often a good fit.

To prove the point around using larger intermediate types, if you assign the intermediate explicitly to a variable, DECIMAL suffers the same problem:

declare @a decimal(19,4)
declare @b decimal(19,4)
declare @c decimal(19,4)
declare @d decimal(19,4)

select @a = 100, @b = 339, @c = 10000

set @d = @a/@b

set @d = @d*@c

select @d

Produces 2950.0000 (okay, so at least DECIMAL rounded rather than MONEY truncated—same as an integer would.)

You can still use the answer provided using Toolbar.inflateMenu even while using setSupportActionBar(toolbar).

I had a scenario where I had to move toolbar setup functionality into a separate class outside of activity which didn't by-itself know of the event onCreateOptionsMenu.

So, to implement this, all I had to do was wait for Toolbar to be drawn before calling inflateMenu by doing the following:

toolbar.post {
    toolbar.inflateMenu(R.menu.my_menu)
}

Might not be considered very clean but still gets the job done.

Ctrl + Alt + O to optimize imports

To have a constant date format irrespective of the computer settings, you must use 3 different input elements to capture day, month, and year respectively. However, you need to validate the user input to ensure that you have a valid date as shown bellow

<input id="txtDay" type="text" placeholder="DD" />

<input id="txtMonth" type="text" placeholder="MM" />

<input id="txtYear" type="text" placeholder="YYYY" />
<button id="but" onclick="validateDate()">Validate</button>


  function validateDate() {
    var date = new Date(document.getElementById("txtYear").value, document.getElementById("txtMonth").value, document.getElementById("txtDay").value);

    if (date == "Invalid Date") {
        alert("jnvalid date");

    }
}

Usually in case of "ImagePullBackOff" it's retried after few seconds/minutes. In case you want to try again manually you can delete the old pod and recreate the pod. The one line command to delete and recreate the pod would be:

kubectl replace --force -f <yml_file_describing_pod>

Here is my answer:

1. Win+R (shortcut for 'run'), type services.msc, Enter
2. You should find an entry like 'MySQL56', right click on it, select properties
3. You should see something like "D:/Program Files/MySQL/MySQL Server 5.6/bin\mysqld" --defaults-file="D:\ProgramData\MySQL\MySQL Server 5.6\my.ini" MySQL56

Full answer here: https://stackoverflow.com/a/20136523/1316649

just add

android:gravity="center"

and done :)

My problem turned out to be blank spaces in the txt file that I was using to feed the WMI Powershell script.

I think it's better to avoid the situation. It's cleaner and clearer to write:

a = None
if condition:
    a = 42

mysql --batch, -B

Print results using tab as the column separator, with each row on a new line. With this option, mysql does not use the history file. Batch mode results in non-tabular output format and escaping of special characters. Escaping may be disabled by using raw mode; see the description for the --raw option.

This will give you a tab separated file. Since commas (or strings containing comma) are not escaped it is not straightforward to change the delimiter to comma.

I used:

recode UTF-16..UTF-8 <filename>

to get rid of zeroes in file.

I just ran into this problem on a UICollectionView and the way that i solved it similar to the answer above but in a pure UICollectionView way.

1. Create a custom UICollectionViewCell that contains whatever you will be filling it with to make it dynamic. I created its own .xib for it as it seems like the easiest approach.

2. Add constraints in that .xib that allow for the cell to be calculated from top to bottom. The re-sizing won't work if you haven't accounted for all of the height. Say you have a view on top, then a label underneath it, and another label underneath that. You would need to connect constraints to the top of the cell to the top of that view, then the bottom of the view to the top of the first label, bottom of first label to the top of the second label, and bottom of second label to bottom of cell.

3. Load the .xib into the viewcontroller and register it with the collectionView on viewDidLoad

   let nib = UINib(nibName: CustomCellName, bundle: nil)
   self.collectionView!.registerNib(nib, forCellWithReuseIdentifier: "customCellID")`
   

4. Load a second copy of that xib into the class and store it as a property so you can use it to determine the size of what that cell should be

   let sizingNibNew = NSBundle.mainBundle().loadNibNamed(CustomCellName, owner: CustomCellName.self, options: nil) as NSArray
   self.sizingNibNew = (sizingNibNew.objectAtIndex(0) as? CustomViewCell)!
   

5. Implement the UICollectionViewFlowLayoutDelegate in your view controller. The method that matters is called sizeForItemAtIndexPath. Inside that method you will need to pull the data from the datasource that is associated with that cell from the indexPath. Then configure the sizingCell and call preferredLayoutSizeFittingSize. The method returns a CGSize which will consist of the width minus the content insets and the height that is returned from self.sizingCell.preferredLayoutSizeFittingSize(targetSize).

   override func collectionView(collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAtIndexPath indexPath: NSIndexPath) -> CGSize {
       guard let data = datasourceArray?[indexPath.item] else {
           return CGSizeZero
       }
       let sectionInset = self.collectionView?.collectionViewLayout.sectionInset
       let widthToSubtract = sectionInset!.left + sectionInset!.right
   
       let requiredWidth = collectionView.bounds.size.width
   
   
       let targetSize = CGSize(width: requiredWidth, height: 0)
   
       sizingNibNew.configureCell(data as! CustomCellData, delegate: self)
       let adequateSize = self.sizingNibNew.preferredLayoutSizeFittingSize(targetSize)
       return CGSize(width: (self.collectionView?.bounds.width)! - widthToSubtract, height: adequateSize.height)
    }
   

6. In the class of the custom cell itself you will need to override awakeFromNib and tell the contentView that its size needs to be flexible

    override func awakeFromNib() {
       super.awakeFromNib()
       self.contentView.autoresizingMask = [UIViewAutoresizing.FlexibleHeight]
    }
   

7. In the custom cell override layoutSubviews

    override func layoutSubviews() {
      self.layoutIfNeeded()
     }
   

8. In the class of the custom cell implement preferredLayoutSizeFittingSize. This is where you will need to do any trickery on the items that are being laid out. If its a label you will need to tell it what its preferredMaxWidth should be.

   func preferredLayoutSizeFittingSize(_ targetSize: CGSize)-> CGSize {
   
       let originalFrame = self.frame
       let originalPreferredMaxLayoutWidth = self.label.preferredMaxLayoutWidth
   
   
       var frame = self.frame
       frame.size = targetSize
       self.frame = frame
   
       self.setNeedsLayout()
       self.layoutIfNeeded()
       self.label.preferredMaxLayoutWidth = self.questionLabel.bounds.size.width
   
   
       // calling this tells the cell to figure out a size for it based on the current items set
       let computedSize = self.systemLayoutSizeFittingSize(UILayoutFittingCompressedSize)
   
       let newSize = CGSize(width:targetSize.width, height:computedSize.height)
   
       self.frame = originalFrame
       self.questionLabel.preferredMaxLayoutWidth = originalPreferredMaxLayoutWidth
   
       return newSize
   }
   

All those steps should give you the correct sizes. If your getting 0 or other funky numbers than you haven't set up your constraints properly.

See:

Lu Luo, A UML Documentation for a Elevator System
Distributed Embedded Systems, Fall 2000
Ph.D. Project Report
Carneghie Mellon University

link

I was working on a fresh project and got the similar type of problem. I just ran ng update --all and my problem was solved.

I used https://iconifier.net I uploaded my image, downloaded images zip file, added images to my server, followed the directions on the site including adding the links to my index.html and it worked. My favicon now shows on my iPhone in Safari when 'Add to home screen'

Some notes to complement the ALTER DATABASE process:

1) You can obtain a full list of databases with logical names and full paths of MDF and LDF files:

   USE master SELECT name, physical_name FROM sys.master_files

2) You can move manually the files with CMD move command:

Move "Source" "Destination"

Example:

md "D:\MSSQLData"
Move "C:\test\SYSADMIT-DB.mdf" "D:\MSSQLData\SYSADMIT-DB_Data.mdf"
Move "C:\test\SYSADMIT-DB_log.ldf" "D:\MSSQLData\SYSADMIT-DB_log.ldf"

3) You should change the default database path for new databases creation. The default path is obtained from the Windows registry.

You can also change with T-SQL, for example, to set default destination to: D:\MSSQLData

USE [master]

GO

EXEC xp_instance_regwrite N'HKEY_LOCAL_MACHINE', N'Software\Microsoft\MSSQLServer\MSSQLServer', N'DefaultData', REG_SZ, N'D:\MSSQLData'

GO

EXEC xp_instance_regwrite N'HKEY_LOCAL_MACHINE', N'Software\Microsoft\MSSQLServer\MSSQLServer', N'DefaultLog', REG_SZ, N'D:\MSSQLData'

GO

Extracted from: http://www.sysadmit.com/2016/08/mover-base-de-datos-sql-server-a-otro-disco.html

Woo-hoo! It works with some hack!

According to this comment you need to:

1. Manually edit Microsoft.CSharp.DesignTime.targets located in C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\MSBuild\Microsoft\VisualStudio\Managed (for VS Community edition, modify path for other editions), append ClassDesigner value to ProjectCapability (right pane):

2. Restart VS.

3. Manually create text file, say MyClasses.cd with following content: <?xml version="1.0" encoding="utf-8"?> <ClassDiagram MajorVersion="1" MinorVersion="1"> <Font Name="Segoe UI" Size="9" /> </ClassDiagram>

Bingo. Now you may open this file in VS. You will see error message "Object reference not set to an instance of object" once after VS starts, but diagram works.

Checked on VS 2017 Community Edition, v15.3.0 with .NETCore 2.0 app/project:

GitHub issue expected to fix in v15.5

An in statement will be parsed identically to field=val1 or field=val2 or field=val3. Putting a null in there will boil down to field=null which won't work.

(Comment by Marc B)

I would do this for clairity

SELECT *
FROM tbl_name
WHERE 
(id_field IN ('value1', 'value2', 'value3') OR id_field IS NULL)

I've recently been trying to do something similar and I have found these answers inadequate for my use cases (a distributed library that needs to detect project root). Mainly I've been battling different environments and platforms, and still haven't found something perfectly universal.

Code local to project

I've seen this example mentioned and used in a few places, Django, etc.

import os
print(os.path.dirname(os.path.abspath(__file__)))

Simple as this is, it only works when the file that the snippet is in is actually part of the project. We do not retrieve the project directory, but instead the snippet's directory

Similarly, the sys.modules approach breaks down when called from outside the entrypoint of the application, specifically I've observed a child thread cannot determine this without relation back to the 'main' module. I've explicitly put the import inside a function to demonstrate an import from a child thread, moving it to top level of app.py would fix it.

app/
|-- config
|   `-- __init__.py
|   `-- settings.py
`-- app.py

app.py

#!/usr/bin/env python
import threading


def background_setup():
    # Explicitly importing this from the context of the child thread
    from config import settings
    print(settings.ROOT_DIR)


# Spawn a thread to background preparation tasks
t = threading.Thread(target=background_setup)
t.start()

# Do other things during initialization

t.join()

# Ready to take traffic

settings.py

import os
import sys


ROOT_DIR = None


def setup():
    global ROOT_DIR
    ROOT_DIR = os.path.dirname(sys.modules['__main__'].__file__)
    # Do something slow

Running this program produces an attribute error:

>>> import main
>>> Exception in thread Thread-1:
Traceback (most recent call last):
  File "C:\Python2714\lib\threading.py", line 801, in __bootstrap_inner
    self.run()
  File "C:\Python2714\lib\threading.py", line 754, in run
    self.__target(*self.__args, **self.__kwargs)
  File "main.py", line 6, in background_setup
    from config import settings
  File "config\settings.py", line 34, in <module>
    ROOT_DIR = get_root()
  File "config\settings.py", line 31, in get_root
    return os.path.dirname(sys.modules['__main__'].__file__)
AttributeError: 'module' object has no attribute '__file__'

...hence a threading-based solution

Location independent

Using the same application structure as before but modifying settings.py

import os
import sys
import inspect
import platform
import threading


ROOT_DIR = None


def setup():
    main_id = None
    for t in threading.enumerate():
        if t.name == 'MainThread':
            main_id = t.ident
            break

    if not main_id:
        raise RuntimeError("Main thread exited before execution")

    current_main_frame = sys._current_frames()[main_id]
    base_frame = inspect.getouterframes(current_main_frame)[-1]

    if platform.system() == 'Windows':
        filename = base_frame.filename
    else:
        filename = base_frame[0].f_code.co_filename

    global ROOT_DIR
    ROOT_DIR = os.path.dirname(os.path.abspath(filename))

Breaking this down: First we want to accurately find the thread ID of the main thread. In Python3.4+ the threading library has threading.main_thread() however, everybody doesn't use 3.4+ so we search through all threads looking for the main thread save it's ID. If the main thread has already exited, it won't be listed in the threading.enumerate(). We raise a RuntimeError() in this case until I find a better solution.

main_id = None
for t in threading.enumerate():
    if t.name == 'MainThread':
        main_id = t.ident
        break

if not main_id:
    raise RuntimeError("Main thread exited before execution")

Next we find the very first stack frame of the main thread. Using the cPython specific function sys._current_frames() we get a dictionary of every thread's current stack frame. Then utilizing inspect.getouterframes() we can retrieve the entire stack for the main thread and the very first frame. current_main_frame = sys._current_frames()[main_id] base_frame = inspect.getouterframes(current_main_frame)[-1] Finally, the differences between Windows and Linux implementations of inspect.getouterframes() need to be handled. Using the cleaned up filename, os.path.abspath() and os.path.dirname() clean things up.

if platform.system() == 'Windows':
    filename = base_frame.filename
else:
    filename = base_frame[0].f_code.co_filename

global ROOT_DIR
ROOT_DIR = os.path.dirname(os.path.abspath(filename))

So far I've tested this on Python2.7 and 3.6 on Windows as well as Python3.4 on WSL

There might be a reason that Typescript is not installed globally, so install it

npm install -g typescript // installs typescript globally

If you want to convert .ts files into .js, do this as per your need

tsc file.ts // file.ts will be converted to file.js file
tsc         // all .ts files will be converted to .js files in the directory
tsc --watch // converts all .ts files to .js, and watch changes in .ts files

Linting is the process of checking the source code for Programmatic as well as Stylistic errors. This is most helpful in identifying some common and uncommon mistakes that are made during coding.

A Lint or a Linter is a program that supports linting (verifying code quality). They are available for most languages like JavaScript, CSS, HTML, Python, etc..

Some of the useful linters are JSLint, CSSLint, JSHint, Pylint

I am using the following code to print all the values of a nested dictionary, taking into account where the value could be a list containing dictionaries. This was useful to me when parsing a JSON file into a dictionary and needing to quickly check whether any of its values are None.

    d = {
            "user": 10,
            "time": "2017-03-15T14:02:49.301000",
            "metadata": [
                {"foo": "bar"},
                "some_string"
            ]
        }


    def print_nested(d):
        if isinstance(d, dict):
            for k, v in d.items():
                print_nested(v)
        elif hasattr(d, '__iter__') and not isinstance(d, str):
            for item in d:
                print_nested(item)
        elif isinstance(d, str):
            print(d)

        else:
            print(d)

    print_nested(d)

Output:

    10
    2017-03-15T14:02:49.301000
    bar
    some_string

Use Apache Commons' StringUtils library's join method.

String[] stringArray = {"a","b","c"};
StringUtils.join(stringArray, ",");

In case of Swift User

// case of normal image
let image1 = UIImage(named: "your_image_file_name_without_extension")!
button1.setImage(image1, forState: UIControlState.Normal) 

// in case you don't want image to change when "clicked", you can leave code below
// case of when button is clicked
let image2 = UIImage(named: "image_clicked")!
button1.setImage(image2, forState: UIControlState.Highlight) 

You don't say if your array is multi-dimensional. If it is, array_map will not work alone. You need a callback method. For multi-dimensional arrays, try array_change_key_case.

// You can pass array_change_key_case a multi-dimensional array,
// or call a method that returns one
$my_array = array_change_key_case(aMethodThatReturnsMultiDimArray(), CASE_UPPER);

Select id,name,age
from
(
   Select id,name,age
   From Student
   Where age < 15
  Union
   Select id,name,age
   From Student
   Where Name like "%a%"
) results
order by name

first you have to import: import javax.swing.JOptionPane; then you can call it using this:

JOptionPane.showMessageDialog(null, 
                              "ALERT MESSAGE", 
                              "TITLE", 
                              JOptionPane.WARNING_MESSAGE);

the null puts it in the middle of the screen. put whatever in quotes under alert message. Title is obviously title and the last part will format it like an error message. if you want a regular message just replace it with PLAIN_MESSAGE. it works pretty well in a lot of ways mostly for errors.

<iframe> elements have a load event for that.

How you listen to that event is up to you, but generally the best way is to:

1) create your iframe programatically

It makes sure your load listener is always called by attaching it before the iframe starts loading.

<script>
var iframe = document.createElement('iframe');
iframe.onload = function() { alert('myframe is loaded'); }; // before setting 'src'
iframe.src = '...'; 
document.body.appendChild(iframe); // add it to wherever you need it in the document
</script>

2) inline javascript, is another way that you can use inside your HTML markup.

<script>
function onMyFrameLoad() {
  alert('myframe is loaded');
};
</script>

<iframe id="myframe" src="..." onload="onMyFrameLoad(this)"></iframe>

3) You may also attach the event listener after the element, inside a <script> tag, but keep in mind that in this case, there is a slight chance that the iframe is already loaded by the time you get to adding your listener. Therefore it's possible that it will not be called (e.g. if the iframe is very very fast, or coming from cache).

<iframe id="myframe" src="..."></iframe>

<script>
document.getElementById('myframe').onload = function() {
  alert('myframe is loaded');
};
</script>

Also see my other answer about which elements can also fire this type of load event

I got this error when my server process got an exception midway during generating the response and simply closed the connection without saying goodbye. curl still expected data from the connection and complained (rightfully).

chappjc's answer works great when working with XIBs.

I found the cleanest solution when creating TableViewControllers programmatically is by wrapping the UITableViewController instance in another UIViewController and setting constraints accordingly.

Here it is:

UIViewController *containerLeftViewController = [[UIViewController alloc] init];
UITableViewController *tableViewController = [[UITableViewController alloc] init];

containerLeftViewController.view.backgroundColor = [UIColor redColor];

hostsAndMoreTableViewController.view.translatesAutoresizingMaskIntoConstraints = NO;
[containerLeftViewController.view addSubview:tableViewController.view];

[containerLeftViewController addChildViewController:tableViewController];
[tableViewController didMoveToParentViewController:containerLeftViewController];

NSDictionary * viewsDict = @{ @"tableView": tableViewController.view ,
                              @"topGuide": containerLeftViewController.topLayoutGuide,
                              @"bottomGuide": containerLeftViewController.bottomLayoutGuide,
                              };
[containerLeftViewController.view addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|[tableView]|"
                                                                                         options:0
                                                                                         metrics:nil
                                                                                           views:viewsDict]];
[containerLeftViewController.view addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:[topGuide][tableView][bottomGuide]"
                                                                                         options:0
                                                                                         metrics:nil
                                                                                           views:viewsDict]];

Cheers, Ben

Here is a more minimal method without any dependencies or libraries.
It requires the new fetch API. (Can I use it?)

var url = "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAYAAACNbyblAAAAHElEQVQI12P4//8/w38GIAXDIBKE0DHxgljNBAAO9TXL0Y4OHwAAAABJRU5ErkJggg=="

fetch(url)
.then(res => res.blob())
.then(console.log)

With this method you can also easily get a ReadableStream, ArrayBuffer, text, and JSON.
(fyi this also works with node-fetch in Node)

As a function:

const b64toBlob = (base64, type = 'application/octet-stream') => 
  fetch(`data:${type};base64,${base64}`).then(res => res.blob())

I did a simple performance test towards Jeremy's ES6 sync version.
The sync version will block UI for a while. keeping the devtool open can slow the fetch performance

document.body.innerHTML += '<input autofocus placeholder="try writing">'
// get some dummy gradient image
var img=function(){var a=document.createElement("canvas"),b=a.getContext("2d"),c=b.createLinearGradient(0,0,1500,1500);a.width=a.height=3000;c.addColorStop(0,"red");c.addColorStop(1,"blue");b.fillStyle=c;b.fillRect(0,0,a.width,a.height);return a.toDataURL()}();


async function perf() {
  
  const blob = await fetch(img).then(res => res.blob())
  // turn it to a dataURI
  const url = img
  const b64Data = url.split(',')[1]

  // Jeremy Banks solution
  const b64toBlob = (b64Data, contentType = '', sliceSize=512) => {
    const byteCharacters = atob(b64Data);
    const byteArrays = [];
    
    for (let offset = 0; offset < byteCharacters.length; offset += sliceSize) {
      const slice = byteCharacters.slice(offset, offset + sliceSize);
      
      const byteNumbers = new Array(slice.length);
      for (let i = 0; i < slice.length; i++) {
        byteNumbers[i] = slice.charCodeAt(i);
      }
      
      const byteArray = new Uint8Array(byteNumbers);
      
      byteArrays.push(byteArray);
    }
    
    const blob = new Blob(byteArrays, {type: contentType});
    return blob;
  }

  // bench blocking method
  let i = 500
  console.time('blocking b64')
  while (i--) {
    await b64toBlob(b64Data)
  }
  console.timeEnd('blocking b64')
  
  // bench non blocking
  i = 500

  // so that the function is not reconstructed each time
  const toBlob = res => res.blob()
  console.time('fetch')
  while (i--) {
    await fetch(url).then(toBlob)
  }
  console.timeEnd('fetch')
  console.log('done')
}

perf()

The Java Language Specification⁽¹⁾ describes how try-catch-finally is executed. Having no catch is equivalent to not having a catch able to catch the given Throwable.

• If execution of the try block completes abruptly because of a throw of a value V, then there is a choice:
  • If the run-time type of V is assignable to the parameter of any catch clause of the try statement, then …
    …
  • If the run-time type of V is not assignable to the parameter of any catch clause of the try statement, then the finally block is executed. Then there is a choice:
    • If the finally block completes normally, then the try statement completes abruptly because of a throw of the value V.
    • If the finally block completes abruptly for reason S, then the try statement completes abruptly for reason S (and the throw of value V is discarded and forgotten).

(1) Execution of try-catch-finally

First decrements the value and then print it -

awk ' { print $(--NF)}' file

OR

rev file|cut -d ' ' -f2|rev

C: “Programming in C”, Stephen G. Kochan, Developer's Library.

Organized, clear, elaborate, beautiful.

You could simply go to phpmyadmin.conf file and change "deny from all" to "allow from all". Well it worked for me, hope it works for you as well.

My requirement was a bit different. I often work with Comma Delimited and Tab Delimited ASCII files where a single line is a single record of data. And they're really big, so I need to split them into manageable parts (whilst preserving the header row).

So, I reverted back to my classic VBScript method and bashed together a small .vbs script that can be run on any Windows computer (it gets automatically executed by the WScript.exe script host engine on Window).

The benefit of this method is that it uses Text Streams, so the underlying data isn't loaded into memory (or, at least, not all at once). The result is that it's exceptionally fast and it doesn't really need much memory to run. The test file I just split using this script on my i7 was about 1 GB in file size, had about 12 million lines of test and made 25 part files (each with about 500k lines each) – the processing took about 2 minutes and it didn’t go over 3 MB memory used at any point.

The caveat here is that it relies on the text file having "lines" (meaning each record is delimited with a CRLF) as the Text Stream object uses the "ReadLine" function to process a single line at a time. But hey, if you're working with TSV or CSV files, it's perfect.

Option Explicit

Private Const INPUT_TEXT_FILE = "c:\bigtextfile.txt"  'The full path to the big file
Private Const REPEAT_HEADER_ROW = True                'Set to True to duplicate the header row in each part file
Private Const LINES_PER_PART = 500000                 'The number of lines per part file

Dim oFileSystem, oInputFile, oOutputFile, iOutputFile, iLineCounter, sHeaderLine, sLine, sFileExt, sStart

sStart = Now()

sFileExt = Right(INPUT_TEXT_FILE,Len(INPUT_TEXT_FILE)-InstrRev(INPUT_TEXT_FILE,".")+1)
iLineCounter = 0
iOutputFile = 1

Set oFileSystem = CreateObject("Scripting.FileSystemObject")
Set oInputFile = oFileSystem.OpenTextFile(INPUT_TEXT_FILE, 1, False)
Set oOutputFile = oFileSystem.OpenTextFile(Replace(INPUT_TEXT_FILE, sFileExt, "_" & iOutputFile & sFileExt), 2, True)

If REPEAT_HEADER_ROW Then
    iLineCounter = 1
    sHeaderLine = oInputFile.ReadLine()
    Call oOutputFile.WriteLine(sHeaderLine)
End If

Do While Not oInputFile.AtEndOfStream
    sLine = oInputFile.ReadLine()
    Call oOutputFile.WriteLine(sLine)
    iLineCounter = iLineCounter + 1
    If iLineCounter Mod LINES_PER_PART = 0 Then
        iOutputFile = iOutputFile + 1
        Call oOutputFile.Close()
        Set oOutputFile = oFileSystem.OpenTextFile(Replace(INPUT_TEXT_FILE, sFileExt, "_" & iOutputFile & sFileExt), 2, True)
        If REPEAT_HEADER_ROW Then
            Call oOutputFile.WriteLine(sHeaderLine)
        End If
    End If
Loop

Call oInputFile.Close()
Call oOutputFile.Close()
Set oFileSystem = Nothing

Call MsgBox("Done" & vbCrLf & "Lines Processed:" & iLineCounter & vbCrLf & "Part Files: " & iOutputFile & vbCrLf & "Start Time: " & sStart & vbCrLf & "Finish Time: " & Now())

Minimal runnable example

glOrtho: 2D games, objects close and far appear the same size:

glFrustrum: more real-life like 3D, identical objects further away appear smaller:

main.c

#include <stdlib.h>

#include <GL/gl.h>
#include <GL/glu.h>
#include <GL/glut.h>

static int ortho = 0;

static void display(void) {
    glClear(GL_COLOR_BUFFER_BIT);
    glLoadIdentity();
    if (ortho) {
    } else {
        /* This only rotates and translates the world around to look like the camera moved. */
        gluLookAt(0.0, 0.0, -3.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0);
    }
    glColor3f(1.0f, 1.0f, 1.0f);
    glutWireCube(2);
    glFlush();
}

static void reshape(int w, int h) {
    glViewport(0, 0, w, h);
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    if (ortho) {
        glOrtho(-2.0, 2.0, -2.0, 2.0, -1.5, 1.5);
    } else {
        glFrustum(-1.0, 1.0, -1.0, 1.0, 1.5, 20.0);
    }
    glMatrixMode(GL_MODELVIEW);
}

int main(int argc, char** argv) {
    glutInit(&argc, argv);
    if (argc > 1) {
        ortho = 1;
    }
    glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB);
    glutInitWindowSize(500, 500);
    glutInitWindowPosition(100, 100);
    glutCreateWindow(argv[0]);
    glClearColor(0.0, 0.0, 0.0, 0.0);
    glShadeModel(GL_FLAT);
    glutDisplayFunc(display);
    glutReshapeFunc(reshape);
    glutMainLoop();
    return EXIT_SUCCESS;
}

GitHub upstream.

Compile:

gcc -ggdb3 -O0 -o main -std=c99 -Wall -Wextra -pedantic main.c -lGL -lGLU -lglut

Run with glOrtho:

./main 1

Run with glFrustrum:

./main

Tested on Ubuntu 18.10.

Schema

Ortho: camera is a plane, visible volume a rectangle:

Frustrum: camera is a point,visible volume a slice of a pyramid:

Image source.

Parameters

We are always looking from +z to -z with +y upwards:

glOrtho(left, right, bottom, top, near, far)

• left: minimum x we see
• right: maximum x we see
• bottom: minimum y we see
• top: maximum y we see
• -near: minimum z we see. Yes, this is -1 times near. So a negative input means positive z.
• -far: maximum z we see. Also negative.

Schema:

Image source.

How it works under the hood

In the end, OpenGL always "uses":

glOrtho(-1.0, 1.0, -1.0, 1.0, -1.0, 1.0);

If we use neither glOrtho nor glFrustrum, that is what we get.

glOrtho and glFrustrum are just linear transformations (AKA matrix multiplication) such that:

• glOrtho: takes a given 3D rectangle into the default cube
• glFrustrum: takes a given pyramid section into the default cube

This transformation is then applied to all vertexes. This is what I mean in 2D:

Image source.

The final step after transformation is simple:

• remove any points outside of the cube (culling): just ensure that x, y and z are in [-1, +1]
• ignore the z component and take only x and y, which now can be put into a 2D screen

With glOrtho, z is ignored, so you might as well always use 0.

One reason you might want to use z != 0 is to make sprites hide the background with the depth buffer.

Deprecation

glOrtho is deprecated as of OpenGL 4.5: the compatibility profile 12.1. "FIXED-FUNCTION VERTEX TRANSFORMATIONS" is in red.

So don't use it for production. In any case, understanding it is a good way to get some OpenGL insight.

Modern OpenGL 4 programs calculate the transformation matrix (which is small) on the CPU, and then give the matrix and all points to be transformed to OpenGL, which can do the thousands of matrix multiplications for different points really fast in parallel.

Manually written vertex shaders then do the multiplication explicitly, usually with the convenient vector data types of the OpenGL Shading Language.

Since you write the shader explicitly, this allows you to tweak the algorithm to your needs. Such flexibility is a major feature of more modern GPUs, which unlike the old ones that did a fixed algorithm with some input parameters, can now do arbitrary computations. See also: https://stackoverflow.com/a/36211337/895245

With an explicit GLfloat transform[] it would look something like this:

glfw_transform.c

#include <math.h>
#include <stdio.h>
#include <stdlib.h>

#define GLEW_STATIC
#include <GL/glew.h>

#include <GLFW/glfw3.h>

static const GLuint WIDTH = 800;
static const GLuint HEIGHT = 600;
/* ourColor is passed on to the fragment shader. */
static const GLchar* vertex_shader_source =
    "#version 330 core\n"
    "layout (location = 0) in vec3 position;\n"
    "layout (location = 1) in vec3 color;\n"
    "out vec3 ourColor;\n"
    "uniform mat4 transform;\n"
    "void main() {\n"
    "    gl_Position = transform * vec4(position, 1.0f);\n"
    "    ourColor = color;\n"
    "}\n";
static const GLchar* fragment_shader_source =
    "#version 330 core\n"
    "in vec3 ourColor;\n"
    "out vec4 color;\n"
    "void main() {\n"
    "    color = vec4(ourColor, 1.0f);\n"
    "}\n";
static GLfloat vertices[] = {
/*   Positions          Colors */
     0.5f, -0.5f, 0.0f, 1.0f, 0.0f, 0.0f,
    -0.5f, -0.5f, 0.0f, 0.0f, 1.0f, 0.0f,
     0.0f,  0.5f, 0.0f, 0.0f, 0.0f, 1.0f
};

/* Build and compile shader program, return its ID. */
GLuint common_get_shader_program(
    const char *vertex_shader_source,
    const char *fragment_shader_source
) {
    GLchar *log = NULL;
    GLint log_length, success;
    GLuint fragment_shader, program, vertex_shader;

    /* Vertex shader */
    vertex_shader = glCreateShader(GL_VERTEX_SHADER);
    glShaderSource(vertex_shader, 1, &vertex_shader_source, NULL);
    glCompileShader(vertex_shader);
    glGetShaderiv(vertex_shader, GL_COMPILE_STATUS, &success);
    glGetShaderiv(vertex_shader, GL_INFO_LOG_LENGTH, &log_length);
    log = malloc(log_length);
    if (log_length > 0) {
        glGetShaderInfoLog(vertex_shader, log_length, NULL, log);
        printf("vertex shader log:\n\n%s\n", log);
    }
    if (!success) {
        printf("vertex shader compile error\n");
        exit(EXIT_FAILURE);
    }

    /* Fragment shader */
    fragment_shader = glCreateShader(GL_FRAGMENT_SHADER);
    glShaderSource(fragment_shader, 1, &fragment_shader_source, NULL);
    glCompileShader(fragment_shader);
    glGetShaderiv(fragment_shader, GL_COMPILE_STATUS, &success);
    glGetShaderiv(fragment_shader, GL_INFO_LOG_LENGTH, &log_length);
    if (log_length > 0) {
        log = realloc(log, log_length);
        glGetShaderInfoLog(fragment_shader, log_length, NULL, log);
        printf("fragment shader log:\n\n%s\n", log);
    }
    if (!success) {
        printf("fragment shader compile error\n");
        exit(EXIT_FAILURE);
    }

    /* Link shaders */
    program = glCreateProgram();
    glAttachShader(program, vertex_shader);
    glAttachShader(program, fragment_shader);
    glLinkProgram(program);
    glGetProgramiv(program, GL_LINK_STATUS, &success);
    glGetProgramiv(program, GL_INFO_LOG_LENGTH, &log_length);
    if (log_length > 0) {
        log = realloc(log, log_length);
        glGetProgramInfoLog(program, log_length, NULL, log);
        printf("shader link log:\n\n%s\n", log);
    }
    if (!success) {
        printf("shader link error");
        exit(EXIT_FAILURE);
    }

    /* Cleanup. */
    free(log);
    glDeleteShader(vertex_shader);
    glDeleteShader(fragment_shader);
    return program;
}

int main(void) {
    GLint shader_program;
    GLint transform_location;
    GLuint vbo;
    GLuint vao;
    GLFWwindow* window;
    double time;

    glfwInit();
    window = glfwCreateWindow(WIDTH, HEIGHT, __FILE__, NULL, NULL);
    glfwMakeContextCurrent(window);
    glewExperimental = GL_TRUE;
    glewInit();
    glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
    glViewport(0, 0, WIDTH, HEIGHT);

    shader_program = common_get_shader_program(vertex_shader_source, fragment_shader_source);

    glGenVertexArrays(1, &vao);
    glGenBuffers(1, &vbo);
    glBindVertexArray(vao);
    glBindBuffer(GL_ARRAY_BUFFER, vbo);
    glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
    /* Position attribute */
    glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 6 * sizeof(GLfloat), (GLvoid*)0);
    glEnableVertexAttribArray(0);
    /* Color attribute */
    glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 6 * sizeof(GLfloat), (GLvoid*)(3 * sizeof(GLfloat)));
    glEnableVertexAttribArray(1);
    glBindVertexArray(0);

    while (!glfwWindowShouldClose(window)) {
        glfwPollEvents();
        glClear(GL_COLOR_BUFFER_BIT);

        glUseProgram(shader_program);
        transform_location = glGetUniformLocation(shader_program, "transform");
        /* THIS is just a dummy transform. */
        GLfloat transform[] = {
            0.0f, 0.0f, 0.0f, 0.0f,
            0.0f, 0.0f, 0.0f, 0.0f,
            0.0f, 0.0f, 1.0f, 0.0f,
            0.0f, 0.0f, 0.0f, 1.0f,
        };
        time = glfwGetTime();
        transform[0] = 2.0f * sin(time);
        transform[5] = 2.0f * cos(time);
        glUniformMatrix4fv(transform_location, 1, GL_FALSE, transform);

        glBindVertexArray(vao);
        glDrawArrays(GL_TRIANGLES, 0, 3);
        glBindVertexArray(0);
        glfwSwapBuffers(window);
    }
    glDeleteVertexArrays(1, &vao);
    glDeleteBuffers(1, &vbo);
    glfwTerminate();
    return EXIT_SUCCESS;
}

GitHub upstream.

Compile and run:

gcc -ggdb3 -O0 -o glfw_transform.out -std=c99 -Wall -Wextra -pedantic glfw_transform.c -lGL -lGLU -lglut -lGLEW -lglfw -lm
./glfw_transform.out

Output:

The matrix for glOrtho is really simple, composed only of scaling and translation:

scalex, 0,      0,      translatex,
0,      scaley, 0,      translatey,
0,      0,      scalez, translatez,
0,      0,      0,      1

as mentioned in the OpenGL 2 docs.

The glFrustum matrix is not too hard to calculate by hand either, but starts getting annoying. Note how frustum cannot be made up with only scaling and translations like glOrtho, more info at: https://gamedev.stackexchange.com/a/118848/25171

The GLM OpenGL C++ math library is a popular choice for calculating such matrices. http://glm.g-truc.net/0.9.2/api/a00245.html documents both an ortho and frustum operations.

tr --delete '\n' < yourfile.txt
tr -d '\n' < yourfile.txt

Edit:

If none of the commands posted here are working, then you have something other than a newline separating your fields. Possibly you have DOS/Windows line endings in the file (although I would expect the Perl solutions to work even in that case)?

Try:

tr -d "\n\r" < yourfile.txt

If that doesn't work then you're going to have to inspect your file more closely (e.g. in a hex editor) to find out what characters are actually in there that you want to remove.

You need to use anchors to match the beginning of the string ^ and the end of the string $

^[0-9]{2}$

Solution for those, who have problem after moving to KitKat:

"This will get the file path from the MediaProvider, DownloadsProvider, and ExternalStorageProvider, while falling back to the unofficial ContentProvider method" https://stackoverflow.com/a/20559175/690777

Anaconda is a very large installation ~ 2 GB and is most useful for those users who are not familiar with installing modules or packages with other package managers.

Anaconda seems to be promoting itself as the official package manager of Jupyter. It's not. Anaconda bundles Jupyter, R, python, and many packages with its installation.

Anaconda is not necessary for installing Jupyter Lab or the R kernel. There is plenty of information available elsewhere for installing Jupyter Lab or Notebooks. There is also plenty of information elsewhere for installing R studio. The following shows how to install the R kernel directly from R Studio:

To install the R kernel, without Anaconda, start R Studio. In the R terminal window enter these three commands:

install.packages("devtools")
devtools::install_github("IRkernel/IRkernel")
IRkernel::installspec()

Done. Next time Jupyter is opened, the R kernel will be available.

Try This. You need pass the authentication to let the server know its a valid user. You need to import these two packages and has to include a jersy jar. If you dont want to include jersy jar then import this package

import sun.misc.BASE64Encoder;

import com.sun.jersey.core.util.Base64;
import sun.net.www.protocol.http.HttpURLConnection;

and then,

String encodedAuthorizedUser = getAuthantication("username", "password");
URL url = new URL("Your Valid Jira URL");
HttpURLConnection httpCon = (HttpURLConnection) url.openConnection();
httpCon.setRequestProperty ("Authorization", "Basic " + encodedAuthorizedUser );

 public String getAuthantication(String username, String password) {
   String auth = new String(Base64.encode(username + ":" + password));
   return auth;
 }

Yes, there is a way to write to the event log you are looking for. You don't need to create a new source, just simply use the existent one, which often has the same name as the EventLog's name and also, in some cases like the event log Application, can be accessible without administrative privileges*.

*Other cases, where you cannot access it directly, are the Security EventLog, for example, which is only accessed by the operating system.

I used this code to write directly to the event log Application:

using (EventLog eventLog = new EventLog("Application")) 
{
    eventLog.Source = "Application"; 
    eventLog.WriteEntry("Log message example", EventLogEntryType.Information, 101, 1); 
}

As you can see, the EventLog source is the same as the EventLog's name. The reason of this can be found in Event Sources @ Windows Dev Center (I bolded the part which refers to source name):

Each log in the Eventlog key contains subkeys called event sources. The event source is the name of the software that logs the event. It is often the name of the application or the name of a subcomponent of the application if the application is large. You can add a maximum of 16,384 event sources to the registry.

In my application i have component and all data is coming from API which i am calling in Component's constructor. There is button by which i am updating my page data. on button click i have save data in back end and refresh data. So to reload/refresh the component - as per my requirement - is only to refresh the data. if this is also your requirement then use the same code written in constructor of component.

Updated: Aug 27 2014 - [updateOrCreate Built into core...]

Just in case people are still coming across this... I found out a few weeks after writing this, that this is in fact part of Laravel's Eloquent's core...

Digging into Eloquent’s equivalent method(s). You can see here:

https://github.com/laravel/framework/blob/4.2/src/Illuminate/Database/Eloquent/Model.php#L553

on :570 and :553

    /**
     * Create or update a record matching the attributes, and fill it with values.
     *
     * @param  array  $attributes
     * @param  array  $values
     * @return static
     */
    public static function updateOrCreate(array $attributes, array $values = array())
    {
        $instance = static::firstOrNew($attributes);

        $instance->fill($values)->save();

        return $instance;
    }

Old Answer Below

I am wondering if there is any built in L4 functionality for doing this in some way such as:

$row = DB::table('table')->where('id', '=', $id)->first();
// Fancy field => data assignments here
$row->save();

I did create this method a few weeks back...

// Within a Model extends Eloquent
public static function createOrUpdate($formatted_array) {
    $row = Model::find($formatted_array['id']);
    if ($row === null) {
        Model::create($formatted_array);
        Session::flash('footer_message', "CREATED");
    } else {
        $row->update($formatted_array);
        Session::flash('footer_message', "EXISITING");
    }
    $affected_row = Model::find($formatted_array['id']);
    return $affected_row;
}

I Hope that helps. I would love to see an alternative to this if anyone has one to share. @erikthedev_

Does the -verbose flag to your java command yield any useful info? If not, maybe java -X reveals something specific to your version that might help?

short answer, specific to OAuth2,

• HS256 user client secret to generate the token signature and same secret is required to validate the token in back-end. So you should have a copy of that secret in your back-end server to verify the signature.
• RS256 use public key encryption to sign the token.Signature(hash) will create using private key and it can verify using public key. So, no need of private key or client secret to store in back-end server, but back-end server will fetch the public key from openid configuration url in your tenant (https://[tenant]/.well-known/openid-configuration) to verify the token. KID parameter inside the access_toekn will use to detect the correct key(public) from openid-configuration.

I wrote a small javascript bookmarklet you can use to display the size. You can easily add it to your browser and whenever you click it you will see the size in the right corner of your browser window.

Here you find information how to use a bookmarklet https://en.wikipedia.org/wiki/Bookmarklet

Bookmarklet

javascript:(function(){!function(){var i,n,e;return n=function(){var n,e,t;return t="background-color:azure; padding:1rem; position:fixed; right: 0; z-index:9999; font-size: 1.2rem;",n=i('<div style="'+t+'"></div>'),e=function(){return'<p style="margin:0;">width: '+i(window).width()+" height: "+i(window).height()+"</p>"},n.html(e()),i("body").prepend(n),i(window).resize(function(){n.html(e())})},(i=window.jQuery)?(i=window.jQuery,n()):(e=document.createElement("script"),e.src="http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js",e.onload=n,document.body.appendChild(e))}()}).call(this);

Original Code

The original code is in coffee:

(->
  addWindowSize = ()->
    style = 'background-color:azure; padding:1rem; position:fixed; right: 0; z-index:9999; font-size: 1.2rem;'
    $windowSize = $('<div style="' + style + '"></div>')

    getWindowSize = ->
      '<p style="margin:0;">width: ' + $(window).width() + ' height: ' + $(window).height() + '</p>'

    $windowSize.html getWindowSize()
    $('body').prepend $windowSize
    $(window).resize ->
      $windowSize.html getWindowSize()
      return

  if !($ = window.jQuery)
    # typeof jQuery=='undefined' works too
    script = document.createElement('script')
    script.src = 'http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js'
    script.onload = addWindowSize
    document.body.appendChild script
  else
    $ = window.jQuery
    addWindowSize()
)()

Basically the code is prepending a small div which updates when you resize your window.

I was able to get past this by using the Array keyword instead of empty brackets:

const enhancers: Array<any> = [];

Use:

if (typeof devToolsExtension === 'function') {
  enhancers.push(devToolsExtension())
}

Hash's key? method tells you whether a given key is present or not.

session.key?("user")

unbind() doesn't work with hardcoded inline events.

So, for example, if you want to unbind the mouseover event from <div id="some_div" onmouseover="do_something();">, I found that $('#some_div').attr('onmouseover','') is a quick and dirty way to achieve it.

char* load_string()
 {

char* string = (char*) malloc(sizeof(char));
*string = '\0';

int key;
int sizer = 2;

char sup[2] = {'\0'};

while( (key = getc(stdin)) != '\n')
{
    string = realloc(string,sizer * sizeof(char));
    sup[0] = (char) key;
    strcat(string,sup);
    sizer++

}
return string;

}

int main()
  {
char* str;
str = load_string();

return 0;
  }

You can use following methods to handle drop down in selenium.

1. driver.selectByVisibleText("Text");
2. driver.selectByIndex(1);
3. driver.selectByValue("prog");

For more details you can refer http://www.codealumni.com/handle-drop-selenium-webdriver/ this post.

It will definately help you a lot in resolving your queries.

Got the same error recently but was able to fixed it by ensuring to close every wcf client call. eg.

WCFServiceClient client = new WCFServiceClient ();
//More codes here
// Always close the client.
client.Close();

or

using(WCFServiceClient client = new WCFServiceClient ())
{ 
    //More codes here 
}

Well, it might help someone. I was stupid enough to put var_dump('testing'); in the function I was requesting JSON from to be sure the request was actually received. This obviously also echo's as part for the expected json response, and with dataType set to json defined, the request fails.

Thanks to the answer of redsquare I added a method like this:

$.validator.addMethod(
  "regex",
  function(value, element, regexp) {
    var re = new RegExp(regexp);
    return this.optional(element) || re.test(value);
  },
  "Please check your input."
);

Now all you need to do to validate against any regex is this:

$("#Textbox").rules("add", { regex: "^[a-zA-Z'.\\s]{1,40}$" })

Additionally, it looks like there is a file called additional-methods.js that contains the method "pattern", which can be a RegExp when created using the method without quotes.

Edit

The pattern function is now the preferred way to do this, making the example:

$("#Textbox").rules("add", { pattern: "^[a-zA-Z'.\\s]{1,40}$" })

• https://cdnjs.com/libraries/jquery-validate
  • https://cdnjs.cloudflare.com/ajax/libs/jquery-validate/1.19.2/jquery.validate.min.js
  • https://cdnjs.cloudflare.com/ajax/libs/jquery-validate/1.19.2/additional-methods.min.js

Depends on which "cloud" you would want to use. If it is Google App Engine, you can use Java or Python. Groovy too is supported on Google App Engine which runs on jvm. If you are going with Amazon, you can pretty much install any OS (Amazon Machine Images) you would like with any application server and use any language depending on the application servers support for the language. But doing something like that would mean a lot of technical understanding of scalability concepts. Some of the services might be provided off the shelf like DB services, storage etc. I heard about ruby and Heroku (another cloud application platform). But dont have experience with it.

Personally I prefer Java/Groovy for such things because of the vast libraries and tools available.

When you select a radio button and click on a submit button, you need to handle the submission of any selected values in your php code using $_POST[]
For example:
if your radio button is:

<input type="radio" name="rdb" value="male"/>

then in your php code you need to use:

$rdb_value = $_POST['rdb'];

Existing answers did a great job at explaining the what of this reverse() function in Django.

However, I'd hoped that my answer shed a different light at the why: why use reverse() in place of other more straightforward, arguably more pythonic approaches in template-view binding, and what are some legitimate reasons for the popularity of this "redirect via reverse() pattern" in Django routing logic.

One key benefit is the reverse construction of a url, as others have mentioned. Just like how you would use {% url "profile" profile.id %} to generate the url from your app's url configuration file: e.g. path('<int:profile.id>/profile', views.profile, name="profile").

But as the OP have noted, the use of reverse() is also commonly combined with the use of HttpResponseRedirect. But why?

I am not quite sure what this is but it is used together with HttpResponseRedirect. How and when is this reverse() supposed to be used?

Consider the following views.py:

from django.http import HttpResponseRedirect
from django.urls import reverse

def vote(request, question_id):
    question = get_object_or_404(Question, pk=question_id)
    try:
        selected = question.choice_set.get(pk=request.POST['choice'])
    except KeyError:
        # handle exception
        pass
    else:
        selected.votes += 1
        selected.save()
        return HttpResponseRedirect(reverse('polls:polls-results',
                                    args=(question.id)
        ))

And our minimal urls.py:

from django.urls import path
from . import views

app_name = 'polls'
urlpatterns = [
    path('<int:question_id>/results/', views.results, name='polls-results'),
    path('<int:question_id>/vote/', views.vote, name='polls-vote')
]

In the vote() function, the code in our else block uses reverse along with HttpResponseRedirect in the following pattern:

HttpResponseRedirect(reverse('polls:polls-results',
                                        args=(question.id)

This first and foremost, means we don't have to hardcode the URL (consistent with the DRY principle) but more crucially, reverse() provides an elegant way to construct URL strings by handling values unpacked from the arguments (args=(question.id) is handled by URLConfig). Supposed question has an attribute id which contains the value 5, the URL constructed from the reverse() would then be:

'/polls/5/results/'

In normal template-view binding code, we use HttpResponse() or render() as they typically involve less abstraction: one view function returning one template:

def index(request):
    return render(request, 'polls/index.html') 

But in many legitimate cases of redirection, we typically care about constructing the URL from a list of parameters. These include cases such as:

• HTML form submission through POST request
• User login post-validation
• Reset password through JSON web tokens

Most of these involve some form of redirection, and a URL constructed through a set of parameters. Hope this adds to the already helpful thread of answers!

A more modern approach would be to use the grid property.

section {_x000D_
  display: grid;_x000D_
  align-items: stretch;_x000D_
  height: 300px;_x000D_
  grid-template-rows: min-content auto 60px;_x000D_
}_x000D_
header {_x000D_
  background: tomato;_x000D_
}_x000D_
div {_x000D_
  background: gold;_x000D_
  overflow: auto;_x000D_
}_x000D_
footer {_x000D_
  background: lightgreen;_x000D_
}

<section>_x000D_
  <header>_x000D_
    header: sized to content_x000D_
    <br>(but is it really?)_x000D_
  </header>_x000D_
  <div>_x000D_
    main content: fills remaining space<br>_x000D_
    x<br>x<br>x<br>x<br>x<br>x<br>x<br>x<br>x<br>x<br>_x000D_
    _x000D_
    x<br>x<br>x<br>x<br>x<br>x<br>x<br>x<br>x<br>_x000D_
    x<br>x<br>x<br>x<br>x<br>x<br>x<br>x<br>x<br>_x000D_
    x<br>x<br>x<br>x<br>x<br>x<br>x<br>x<br>x<br>_x000D_
    x<br>x<br>x<br>x<br>x<br>x<br>x<br>x<br>x<br>_x000D_
    _x000D_
  </div>_x000D_
  <footer>_x000D_
    footer: fixed height in px_x000D_
  </footer>_x000D_
</section>

It can be like this

obj = model.objects.filter(id=emp_id)[0]

or

obj = model.objects.latest('id')

If you want to use something like an INI file to hold settings, consider using configparser which loads key value pairs from a text file, and can easily write back to the file.

INI file has the format:

[Section]
key = value
key with spaces = somevalue

input[type="text"], textarea {

  background-color : #d1d1d1; 

}

Hope that helps :)

Edit: working example, http://jsfiddle.net/C5WxK/

$('.modal') 
.on('shown', function(){ 
  console.log('show'); 
  $('body').css({overflow: 'hidden'}); 
}) 
.on('hidden', function(){ 
  $('body').css({overflow: ''}); 
}); 

use this one

It is because Bootstrap's DEFAULT CSS for <hr /> is ::

hr {
    margin-top: 20px;
    margin-bottom: 20px;
    border: 0;
    border-top: 1px solid #eeeeee;
}

it creates 40px gap between those two lines

so if you want to change any particular <hr /> margin style in your page you may try something like this ::

<hr style="margin-bottom:5px !important; margin-top:5px !important; " />

if you want to change appearance/other styles of any particular <hr /> in your page like color and border type or thickness the you may try something like :

<hr style="border-top: 1px dotted #000000 !important; " />

for all <hr /> in your page

<style>
   hr {
       border-top: 1px dotted #000000 !important;
       margin-bottom:5px !important; 
       margin-top:5px !important;
   }
</style>

I wasted 1 day finding the issue , my system was not asking connection "allow" or "reject". i though it was due to some certiifcate issue . tried all methods mentioned above but none of them worked . in the end i found "Firewall was real culprit ". if firewall settings is ON , they will not allow charles to connect with your laptop via proxy IP . make them off and all things will work smoothly .Not sure if that was relevent answer but just want to share.

your question makes no sense. you are asking how to turn a hash into an array. You cant.

you can make a list of values, or make a list of keys, and neither of these have anything to do with jquery, this is pure javascript

Javascript / jQuery get Client's IP Address & Location (Country, City)

You only need to embed a tag with "src" link to the server. The server will return "codehelper_ip" as an Object / JSON, and you can use it right away.

// First, embed this script in your head or at bottom of the page.
<script language="Javascript" src="http://www.codehelper.io/api/ips/?js"></script>
// You can use it
<script language="Javascript">
    alert(codehelper_ip.IP);
    alert(codehelper_ip.Country);
</script>

More information at Javascript Detect Real IP Address Plus Country

If you are using jQUery, you can try:

console.log(codehelper_ip); 

It will show you more information about returned object.

If you want callback function, please try this:

// First, embed this script in your head or at bottom of the page.
<script language="Javascript" src="http://www.codehelper.io/api/ips/?callback=yourcallback"></script>
// You can use it
<script language="Javascript">
    function yourcallback(json) {
       alert(json.IP);
     }
</script>

I don't believe this is possible. The dialog box that gets displayed allows the user to select a printer to print to. So, let's say it would be possible for your application to just click and print, and a user clicks your print button, but has two printers connected to the computer. Or, more likely, that user is working in an office building with 25 printers. Without that dialog box, how would the computer know to which printer to print?

You can define interface normally:

interface MyInterface {
    Name:string;
}

but you can't just do

class MyClass implements MyInterface {
    static Name:string; // typescript won't care about this field
    Name:string;         // and demand this one instead
}

To express that a class should follow this interface for its static properties you need a bit of trickery:

var MyClass: MyInterface;
MyClass = class {
    static Name:string; // if the class doesn't have that field it won't compile
}

You can even keep the name of the class, TypeScript (2.0) won't mind:

var MyClass: MyInterface;
MyClass = class MyClass {
    static Name:string; // if the class doesn't have that field it won't compile
}

If you want to inherit from many interfaces statically you'll have to merge them first into a new one:

interface NameInterface {
    Name:string;
}
interface AddressInterface {
    Address:string;
}
interface NameAndAddressInterface extends NameInterface, AddressInterface { }
var MyClass: NameAndAddressInterface;
MyClass = class MyClass {
    static Name:string; // if the class doesn't have that static field code won't compile
    static Address:string; // if the class doesn't have that static field code won't compile
}

Or if you don't want to name merged interface you can do:

interface NameInterface {
    Name:string;
}
interface AddressInterface {
    Address:string;
}
var MyClass: NameInterface & AddressInterface;
MyClass = class MyClass {
    static Name:string; // if the class doesn't have that static field code won't compile
    static Address:string; // if the class doesn't have that static field code won't compile
}

Working example

.val() always works with textarea elements.

.text() works sometimes and fails other times! It's not reliable (tested in Chrome 33)

What's best is that .val() works seamlessly with other form elements too (like input) whereas .text() fails.

Per Mozilla's Map documentation, you can initialize as follows:

private _gridOptions:Map<string, Array<string>> = 
    new Map([
        ["1", ["test"]],
        ["2", ["test2"]]
    ]);

I think these pictures are understandable.

If you want to restrict your search only to files you should consider to use -type f in your search

try to use also -iname for case-insensitive search

Example:

find /path -iname 'yourstring*' -type f

You could also perform some operations on results without pipe sign or xargs

Example:

Search for files and show their size in MB

find /path -iname 'yourstring*' -type f -exec du -sm {} \;

That is brilliant, the only answer I found that met my particular need, thanks SO much for putting it up!

I made just a minor addition to it so that the screen didn't flash and it removes and subsequently reapplies the password on each sheet as it cycles through [I have the same password for all sheets in the workbook]. In the spirit of your submission, I add this to assist anyone else....

Sub ClearFilters()
    Application.ScreenUpdating = False

    On Error Resume Next
    For Each wrksheet In ActiveWorkbook.Worksheets
        'Change the password to whatever is required
        wrksheet.Unprotect Password:="Albuterol1"
        wrksheet.ShowAllData 'This works for filtered data not in a table

        For Each lstobj In wrksheet.ListObjects
            If lstobj.ShowAutoFilter Then
                lstobj.Range.AutoFilter 'Clear filters from a table
                lstobj.Range.AutoFilter 'Add the filters back to the table
            End If

        'Change the password to whatever is required
        wrksheet.Protect Password:="Albuterol1", _
              DrawingObjects:=True, _
              Contents:=True, _
              Scenarios:=True, _
              AllowFiltering:=True
        Next 'Check next worksheet in the workbook
    Next

    Application.ScreenUpdating = True
End Sub

I know this is a relatively old post and don't really like being a necromancer... But since I had the same issue and tried a few of the options in this thread without success I combined some of the answers to get a working macro..

Hopefully this helps someone out there :)

Sub ResetFilters()
    On Error Resume Next
    For Each wrksheet In ActiveWorkbook.Worksheets
        wrksheet.ShowAllData 'This works for filtered data not in a table
        For Each lstobj In wrksheet.ListObjects
            If lstobj.ShowAutoFilter Then
                lstobj.Range.AutoFilter 'Clear filters from a table
                lstobj.Range.AutoFilter 'Add the filters back to the table
            End If
        Next 'Check next worksheet in the workbook
    Next
End Sub

Your error might be because of the merge branch.
Just follow this:

step 1 : git pull origin master (in case if you get any message then ignore it)
step 2 : git add .
step 3 : git commit -m 'your commit message'
step 4 : git push origin master

To add a header just add the following code to the location block where you want to add the header:

location some-location {
  add_header X-my-header my-header-content;      
}

Obviously, replace the x-my-header and my-header-content with what you want to add. And that's all there is to it.

Can this not be done with a user-defined function to replicate whatever your stored procedure is doing?

SELECT udfMyFunction(user_id), someOtherField, etc FROM MyTable WHERE WhateverCondition

where udfMyFunction is a function you make that takes in the user ID and does whatever you need to do with it.

See http://www.sqlteam.com/article/user-defined-functions for a bit more background

I agree that cursors really ought to be avoided where possible. And it usually is possible!

(of course, my answer presupposes that you're only interested in getting the output from the SP and that you're not changing the actual data. I find "alters user data in a certain way" a little ambiguous from the original question, so thought I'd offer this as a possible solution. Utterly depends on what you're doing!)

I need to change datatype of multiple fields in the collection, so I used the following to make multiple data type changes in the collection of documents. Answer to an old question but may be helpful for others.

db.mycoll.find().forEach(function(obj) { 

    if (obj.hasOwnProperty('phone')) {
        obj.phone = "" + obj.phone;  // int or longint to string
    }

    if (obj.hasOwnProperty('field-name')) {
     obj.field-name = new NumberInt(obj.field-name); //string to integer
    }

    if (obj.hasOwnProperty('cdate')) {
        obj.cdate = new ISODate(obj.cdate); //string to Date
    }

    db.mycoll.save(obj); 
});

I agree with the other answers that point you to app.config. However, rather than reading values directly from app.config, you should create a utility class (AppSettings is the name I use) to read them and expose them as properties. The AppSettings class can be used to aggregate settings from several stores, such as values from app.config and application version info from the assembly (AssemblyVersion and AssemblyFileVersion).

DataGridView.CurrentRow.Cells[n]

See: http://msdn.microsoft.com/en-us/library/system.windows.forms.datagridview.currentrow.aspx

for(n in 1:5) {
  if(n==3) next # skip 3rd iteration and go to next iteration
  cat(n)
}

Since I found that the above approved answer lacks some clarity and the op provides an incorrect solution that he/she will use. I therefore hope that the below example will help others. The solution is more or less portable as well.

/******************************************************************************
 * Checks to see if a directory exists. Note: This method only checks the
 * existence of the full path AND if path leaf is a dir.
 *
 * @return  >0 if dir exists AND is a dir,
 *           0 if dir does not exist OR exists but not a dir,
 *          <0 if an error occurred (errno is also set)
 *****************************************************************************/
int dirExists(const char* const path)
{
    struct stat info;

    int statRC = stat( path, &info );
    if( statRC != 0 )
    {
        if (errno == ENOENT)  { return 0; } // something along the path does not exist
        if (errno == ENOTDIR) { return 0; } // something in path prefix is not a dir
        return -1;
    }

    return ( info.st_mode & S_IFDIR ) ? 1 : 0;
}

I experienced this issue when calling my web api endpoint and solved it.

In my case it was an issue in the way the client was encoding the body content. I was not specifying the encoding or media type. Specifying them solved it.

Not specifying encoding type, caused 415 error:

var content = new StringContent(postData);
httpClient.PostAsync(uri, content);

Specifying the encoding and media type, success:

var content = new StringContent(postData, Encoding.UTF8, "application/json");
httpClient.PostAsync(uri, content);

Here is my version:

def contains(small, big):
    for i in xrange(len(big)-len(small)+1):
        for j in xrange(len(small)):
            if big[i+j] != small[j]:
                break
        else:
            return i, i+len(small)
    return False

It returns a tuple of (start, end+1) since I think that is more pythonic, as Andrew Jaffe points out in his comment. It does not slice any sublists so should be reasonably efficient.

One point of interest for newbies is that it uses the else clause on the for statement - this is not something I use very often but can be invaluable in situations like this.

This is identical to finding substrings in a string, so for large lists it may be more efficient to implement something like the Boyer-Moore algorithm.

library is an object, not an array. You push things onto arrays. Unlike PHP, Javascript makes a distinction.

Your code tries to make a string that looks like the source code for a key-value pair, and then "push" it onto the object. That's not even close to how it works.

What you want to do is add a new key-value pair to the object, where the key is the title and the value is another object. That looks like this:

library[title] = {"foregrounds" : foregrounds, "backgrounds" : backgrounds};

"JSON object" is a vague term. You must be careful to distinguish between an actual object in memory in your program, and a fragment of text that is in JSON format.

1. Download latest dex2jar from here -> dex2jar
2. Run this command on linux -> sh d2j-dex2jar.sh classes.dex
3. Download java decompiler from here - > JD-GUI
4. Drag and drop the classes-dex2jar.jar file to JD-GUI

You can put the above answers into one line like this. And you don't need to write the function.

    <asp:Button runat="server" ID="btnUserDelete" Text="Delete" CssClass="GreenLightButton"
         OnClick="BtnUserDelete_Click" meta:resourcekey="BtnUserDeleteResource1"
OnClientClick="if ( !confirm('Are you sure you want to delete this user?')) return false;"  />

You want the :checkbox:checked selector and map to create an array of the values:

var checkedValues = $('input:checkbox:checked').map(function() {
    return this.value;
}).get();

If your checkboxes have a shared class it would be faster to use that instead, eg. $('.mycheckboxes:checked'), or for a common name $('input[name="Foo"]:checked')

- Update -

If you don't need IE support then you can now make the map() call more succinct by using an arrow function:

var checkedValues = $('input:checkbox:checked').map((i, el) => el.value).get();

var jsonStringNoQuotes = [{"Id":"10","Name":"Matt"},{"Id":"1","Name":"Rock"}];

it will create json object. no need to parse.

jsonStringQuotes = "'" + jsonStringNoQuotes + "'";

will return '[object]'

thats why it(below) is causing error

var myData = JSON.parse(jsonStringQuotes);

Your specific error is with line 11:

awk 'BEGIN{sum+=$2}'

This is a line where awk is invoked, and its BEGIN block is specified - but you are already within a awk script, so you do not need to specify awk. Also you want to run sum+=$2 on each line of input, so you do not want it within a BEGIN block. Hence the line should simply read:

sum+=$2

You also do not need the lines:

x=sum
read name

the first just creates a synonym to sum named x and I'm not sure what the second does, but neither are needed.

This would make your awk script:

#!/bin/awk

### This script currently prints the total number of rows processed.
### You must edit this script to print the average of the 2nd column
### instead of the number of rows.

# This block of code is executed for each line in the file
{
    sum+=$2
    # The script should NOT print out a value for each line
}
# The END block is processed after the last line is read
END {
    # NR is a variable equal to the number of rows in the file
    print "Average: " sum/ NR
    # Change this to print the Average instead of just the number of rows
}

Jonathan Leffler's answer gives the awk one liner which represents the same fixed code, with the addition of checking that there are at least 1 lines of input (this stops any divide by zero error). If

The extensions available for each version of Postgresql vary. An easy way to check which extensions are available is, as has been already mentioned:

SELECT * FROM pg_available_extensions;

If the extension that you are looking for is available, you can install it using:

CREATE EXTENSION 'extensionName';

or if you want to drop it use:

DROP EXTENSION 'extensionName';

With psql you can additionally check if the extension has been successfully installed using \dx, and find more details about the extension using \dx+ extensioName. It returns additional information about the extension, like which packages are used with it.

If the extension is not available in your Postgres version, then you need to download the necessary binary files and libraries and locate it them at /usr/share/conrib

EDIT: Putting the right solution first, originally from this question. It's the only one that searches relative to the module directory:

use FindBin;                 # locate this script
use lib "$FindBin::Bin/..";  # use the parent directory
use yourlib;

There's many other ways that search for libraries relative to the current directory. You can invoke perl with the -I argument, passing the directory of the other module:

perl -I.. yourscript.pl

You can include a line near the top of your perl script:

use lib '..';

You can modify the environment variable PERL5LIB before you run the script:

export PERL5LIB=$PERL5LIB:..

The push(@INC) strategy can also work, but it has to be wrapped in BEGIN{} to make sure that the push is run before the module search:

BEGIN {push @INC, '..'}
use yourlib;

Make sure that response is in JSON format otherwise fires this error.

Use the below command to solve your issue,

pip install mysql-python
apt-get install python3-mysqldb libmysqlclient-dev python-dev

Works on Debian

I sometimes use NULLIF like so...

IF NULLIF(@PreviousStartDate, '') IS NULL

There's probably no reason it's better than the way suggested by @Oded and @bluefeet, just stylistic preference.

@danihp's method is really cool but my tired old brain wouldn't go to COALESCE when I'm thinking is null or empty :-)

if [ $var1 != $var2 ] 
then 
echo "$var1"
else 
echo "$var2"
fi

First off I recommend you use the following constructor instead of the one you currently use:

new SerialPort("COM10", 115200, Parity.None, 8, StopBits.One);

Next, you really should remove this code:

// Wait 10 Seconds for data...
for (int i = 0; i < 1000; i++)
{
    Thread.Sleep(10);
    Console.WriteLine(sp.Read(buf,0,bufSize)); //prints data directly to the Console
}

And instead just loop until the user presses a key or something, like so:

namespace serialPortCollection
{   class Program
    {
        static void Main(string[] args)
        {
            SerialPort sp = new SerialPort("COM10", 115200);
            sp.DataReceived += port_OnReceiveDatazz; // Add DataReceived Event Handler

            sp.Open();
            sp.WriteLine("$"); //Command to start Data Stream

            Console.ReadLine();

            sp.WriteLine("!"); //Stop Data Stream Command
            sp.Close();
        }

       // My Event Handler Method
        private static void port_OnReceiveDatazz(object sender, 
                                   SerialDataReceivedEventArgs e)
        {
            SerialPort spL = (SerialPort) sender;
            byte[] buf = new byte[spL.BytesToRead];
            Console.WriteLine("DATA RECEIVED!");
            spL.Read(buf, 0, buf.Length);
            foreach (Byte b in buf)
            {
                Console.Write(b.ToString());
            }
            Console.WriteLine();
        }
    }
}

Also, note the revisions to the data received event handler, it should actually print the buffer now.

UPDATE 1

I just ran the following code successfully on my machine (using a null modem cable between COM33 and COM34)

namespace TestApp
{
    class Program
    {
        static void Main(string[] args)
        {
            Thread writeThread = new Thread(new ThreadStart(WriteThread));
            SerialPort sp = new SerialPort("COM33", 115200, Parity.None, 8, StopBits.One);
            sp.DataReceived += port_OnReceiveDatazz; // Add DataReceived Event Handler

            sp.Open();
            sp.WriteLine("$"); //Command to start Data Stream

            writeThread.Start();

            Console.ReadLine();

            sp.WriteLine("!"); //Stop Data Stream Command
            sp.Close();
        }

        private static void port_OnReceiveDatazz(object sender, 
                                   SerialDataReceivedEventArgs e)
        {
            SerialPort spL = (SerialPort) sender;
            byte[] buf = new byte[spL.BytesToRead];
            Console.WriteLine("DATA RECEIVED!");
            spL.Read(buf, 0, buf.Length);
            foreach (Byte b in buf)
            {
                Console.Write(b.ToString() + " ");
            }
            Console.WriteLine();
        }

        private static void WriteThread()
        {
            SerialPort sp2 = new SerialPort("COM34", 115200, Parity.None, 8, StopBits.One);
            sp2.Open();
            byte[] buf = new byte[100];
            for (byte i = 0; i < 100; i++)
            {
                buf[i] = i;
            }
            sp2.Write(buf, 0, buf.Length);
            sp2.Close();
        }
    }
}

UPDATE 2

Given all of the traffic on this question recently. I'm beginning to suspect that either your serial port is not configured properly, or that the device is not responding.

I highly recommend you attempt to communicate with the device using some other means (I use hyperterminal frequently). You can then play around with all of these settings (bitrate, parity, data bits, stop bits, flow control) until you find the set that works. The documentation for the device should also specify these settings. Once I figured those out, I would make sure my .NET SerialPort is configured properly to use those settings.

Some tips on configuring the serial port:

Note that when I said you should use the following constructor, I meant that use that function, not necessarily those parameters! You should fill in the parameters for your device, the settings below are common, but may be different for your device.

new SerialPort("COM10", 115200, Parity.None, 8, StopBits.One);

It is also important that you setup the .NET SerialPort to use the same flow control as your device (as other people have stated earlier). You can find more info here:

http://www.lammertbies.nl/comm/info/RS-232_flow_control.html

===== Swift 4.2 / Xcode 10 =====

let randomIntFrom0To10 = Int.random(in: 1..<10)
let randomFloat = Float.random(in: 0..<1)

// if you want to get a random element in an array
let greetings = ["hey", "hi", "hello", "hola"]
greetings.randomElement()

Under the hood Swift uses arc4random_buf to get job done.

===== Swift 4.1 / Xcode 9 =====

arc4random() returns a random number in the range of 0 to 4 294 967 295

drand48() returns a random number in the range of 0.0 to 1.0

arc4random_uniform(N) returns a random number in the range of 0 to N - 1

Examples:

arc4random() // => UInt32 = 2739058784
arc4random() // => UInt32 = 2672503239
arc4random() // => UInt32 = 3990537167
arc4random() // => UInt32 = 2516511476
arc4random() // => UInt32 = 3959558840

drand48() // => Double = 0.88642843322303122
drand48() // => Double = 0.015582849408328769
drand48() // => Double = 0.58409022031727176
drand48() // => Double = 0.15936862653180484
drand48() // => Double = 0.38371587480719427

arc4random_uniform(3) // => UInt32 = 0
arc4random_uniform(3) // => UInt32 = 1
arc4random_uniform(3) // => UInt32 = 0
arc4random_uniform(3) // => UInt32 = 1
arc4random_uniform(3) // => UInt32 = 2

arc4random_uniform() is recommended over constructions like arc4random() % upper_bound as it avoids "modulo bias" when the upper bound is not a power of two.

LIBRARY_PATH is used by gcc before compilation to search directories containing static and shared libraries that need to be linked to your program.

LD_LIBRARY_PATH is used by your program to search directories containing shared libraries after it has been successfully compiled and linked.

EDIT: As pointed below, your libraries can be static or shared. If it is static then the code is copied over into your program and you don't need to search for the library after your program is compiled and linked. If your library is shared then it needs to be dynamically linked to your program and that's when LD_LIBRARY_PATH comes into play.

You can also use any(), map() like so:

if any(map(l.startswith, x)):
    pass # Do something

Or alternatively, using a generator expression:

if any(l.startswith(s) for s in x)
    pass # Do something

All others answers are related to jQuery UI datepicker, but the question is about bootstrap-datepicker.

You can use the on changeDate event to trigger a change event on the related input, and then handle both ways of changing the date from the onChange handler:

changeDate

Fired when the date is changed.

Example:

$('#dp3').datepicker().on('changeDate', function (ev) {
    $('#date-daily').change();
});
$('#date-daily').val('0000-00-00');
$('#date-daily').change(function () {
    console.log($('#date-daily').val());
});

Here is a working fiddle: http://jsfiddle.net/IrvinDominin/frjhgpn8/

glob.glob or os.listdir will do it.

false == 0 and true = !false

i.e. anything that is not zero and can be converted to a boolean is not false, thus it must be true.

Some examples to clarify:

if(0)          // false
if(1)          // true
if(2)          // true
if(0 == false) // true
if(0 == true)  // false
if(1 == false) // false
if(1 == true)  // true
if(2 == false) // false
if(2 == true)  // false
cout << false  // 0
cout << true   // 1

true evaluates to 1, but any int that is not false (i.e. 0) evaluates to true but is not equal to true since it isn't equal to 1.

Your mistake is using the datetime module instead of the date module. You meant to do this:

from datetime import date
date = models.DateField(_("Date"), default=date.today)

If you only want to capture the current date the proper way to handle this is to use the auto_now_add parameter:

date = models.DateField(_("Date"), auto_now_add=True)

However, the modelfield docs clearly state that auto_now_add and auto_now will always use the current date and are not a default value that you can override.

Hide modal dialog box.

Method 1: using Bootstrap.

$('.close').click(); 
$("#MyModal .close").click();
$('#myModalAlert').modal('hide');

Method 2: using stopPropagation().

$("a.close").on("click", function(e) {
  $("#modal").modal("hide");
  e.stopPropagation();
});

Method 3: after shown method invoke.

$('#myModal').on('shown', function () {
  $('#myModal').modal('hide');
})

Method 4: Using CSS.

this.display='block'; //set block CSS
this.display='none'; //set none CSS after close dialog

If you're interested in seeing which specific headers a remote client is sending to your server, and you can cause the request to run a CGI script, then the simplest solution is to have your server script dump the environment variables into a file somewhere.

e.g. run the shell command "env > /tmp/headers" from within your script

Then, look for the environment variables that start with HTTP_...

You will see lines like:

HTTP_ACCEPT=text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
HTTP_ACCEPT_ENCODING=gzip, deflate
HTTP_ACCEPT_LANGUAGE=en-US,en;q=0.5
HTTP_CACHE_CONTROL=max-age=0

Each of those represents a request header.

Note that the header names are modified from the actual request. For example, "Accept-Language" becomes "HTTP_ACCEPT_LANGUAGE", and so on.

You could do something like this:

var result = customlist.Where(p => !otherlist.Any(l => p.someproperty == l.someproperty));

For me, I got similar error when switched between branches - one used newer ("typescriptish") version of @google-cloud/datastore packages which returns object with Datastore constructor as one of properties of exported object and I switched to other branch for a task, an older datastore version was used there, which exports Datastore constructor "directly" as module.exports value. I got the error because node_modules still had newer modules used by branch I switched from.

Let's say there is an administrator dashboard where users are listed with their id printed as a data attribute so it can be retrieved at some point via JavaScript.

An update could be executed this way …

class UserRepository extends \Doctrine\ORM\EntityRepository
{
    public function updateUserStatus($userId, $newStatus)
    {
        return $this->createQueryBuilder('u')
            ->update()
            ->set('u.isActive', '?1')
            ->setParameter(1, $qb->expr()->literal($newStatus))
            ->where('u.id = ?2')
            ->setParameter(2, $qb->expr()->literal($userId))
            ->getQuery()
            ->getSingleScalarResult()
        ;
    }

AJAX action handling:

# Post datas may be:
# handled with a specific custom formType — OR — retrieved from request object
$userId = (int)$request->request->get('userId');
$newStatus = (int)$request->request->get('newStatus');
$em = $this->getDoctrine()->getManager();
$r = $em->getRepository('NAMESPACE\User')
        ->updateUserStatus($userId, $newStatus);
if ( !empty($r) ){
    # Row updated
}

Working example using Doctrine 2.5 (on top of Symfony3).

Since this answer was somehow accepted and thus will appear at the top, although it's not the best, I've improved it based on the other answers and the comments.

The C way; simplest, but will treat any invalid number as 0:

#include <cstdlib>

int x = atoi(argv[1]);

The C way with input checking:

#include <cstdlib>

errno = 0;
char *endptr;
long int x = strtol(argv[1], &endptr, 10);
if (endptr == argv[1]) {
  std::cerr << "Invalid number: " << argv[1] << '\n';
} else if (*endptr) {
  std::cerr << "Trailing characters after number: " << argv[1] << '\n';
} else if (errno == ERANGE) {
  std::cerr << "Number out of range: " << argv[1] << '\n';
}

The C++ iostreams way with input checking:

#include <sstream>

std::istringstream ss(argv[1]);
int x;
if (!(ss >> x)) {
  std::cerr << "Invalid number: " << argv[1] << '\n';
} else if (!ss.eof()) {
  std::cerr << "Trailing characters after number: " << argv[1] << '\n';
}

Alternative C++ way since C++11:

#include <stdexcept>
#include <string>

std::string arg = argv[1];
try {
  std::size_t pos;
  int x = std::stoi(arg, &pos);
  if (pos < arg.size()) {
    std::cerr << "Trailing characters after number: " << arg << '\n';
  }
} catch (std::invalid_argument const &ex) {
  std::cerr << "Invalid number: " << arg << '\n';
} catch (std::out_of_range const &ex) {
  std::cerr << "Number out of range: " << arg << '\n';
}

All four variants assume that argc >= 2. All accept leading whitespace; check isspace(argv[1][0]) if you don't want that. All except atoi reject trailing whitespace.

Instead of overflow:auto, try overflow-y:auto. Should work like a charm!

The same problem I faced in my project. Thanks to @Umar Rashed, but I am going to explain it in detail.

First, Provide Date Pipe from app.module:

providers: [DatePipe]

Import to your component and app.module:

import { DatePipe } from '@angular/common';

Second, declare it under the constructor:

constructor(
    public datepipe: DatePipe
  ) {

Dates come from the server and parsed to console like this:

2000-09-19T00:00:00

I convert the date to how I need with this code; in TypeScript:

this.datepipe.transform(this.birthDate, 'dd/MM/yyyy')

Show from HTML template:

{{ user.birthDate }}

and it is seen like this:

19/09/2000

also seen on the web site like this: dates shown as it is filtered (click to see the screenshot)

You can remove the hover state by temporarily removing the link from the DOM. See http://testbug.handcraft.com/ipad.html

In the CSS you have:

:hover {background:red;}

In the JS you have:

function fix()
{
    var el = this;
    var par = el.parentNode;
    var next = el.nextSibling;
    par.removeChild(el);
    setTimeout(function() {par.insertBefore(el, next);}, 0)
}

And then in your HTML you have:

<a href="#" ontouchend="this.onclick=fix">test</a>

If you are not using redux-form and you are using local state for changes then your react-select component might look like this:

class MySelect extends Component {

constructor() {
    super()
}

state = {
     selectedValue: 'default' // your default value goes here
}

render() {
  <Select
       ...
       value={this.state.selectedValue}
       ...
  />
)}

The capitalization is wrong, and you have an extra argument.

Do this instead:

$('img#thumb').removeAttr('id');

For future reference, there aren't any jQuery methods that begin with a capital letter. They all take the same form as this one, starting with a lower case, and the first letter of each joined "word" is upper case.

The Ubuntu package docker actually refers to a GUI application, not the beloved DevOps tool we've come out to look for.

The instructions for docker can be followed per instructions on the docker page here: https://docs.docker.com/engine/install/ubuntu/

=== UPDATED (thanks @Scott Stensland) ===

You now run the following install script to get docker:

`sudo curl -sSL https://get.docker.com/ | sh`

• Note: review the script on the website and make sure you have the right link before continuing since you are running this as sudo.

This will run a script that installs docker. Note the last part of the script:

If you would like to use Docker as a non-root user, you should now consider
adding your user to the "docker" group with something like:

  `sudo usermod -aG docker stens`

Remember that you will have to log out and back in for this to take effect!

To update Docker run:

`sudo apt-get update && sudo apt-get upgrade`

For more details on what's going on, See the docker install documentation or @Scott Stensland's answer below

.

=== UPDATE: For those uncomfortable w/ sudo | sh ===

Some in the comments have mentioned that it a risk to run an arbitrary script as sudo. The above option is a convenience script from docker to make the task simple. However, for those that are security-focused but don't want to read the script you can do the following:

1. Add Dependencies

sudo apt-get update; \
sudo apt-get install \
 apt-transport-https \
 ca-certificates \
 curl \
 gnupg-agent \
 software-properties-common

2. Add docker gpg key

curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -

(Security check, verify key fingerprint 9DC8 5822 9FC7 DD38 854A E2D8 8D81 803C 0EBF CD88

$ sudo apt-key fingerprint 0EBFCD88

pub   rsa4096 2017-02-22 [SCEA]
      9DC8 5822 9FC7 DD38 854A  E2D8 8D81 803C 0EBF CD88
uid           [ unknown] Docker Release (CE deb) <[email protected]>
sub   rsa4096 2017-02-22 [S]

)

3. Setup Repository

sudo add-apt-repository \
   "deb [arch=amd64] https://download.docker.com/linux/ubuntu \
   $(lsb_release -cs) \
   stable"

4. Install Docker

sudo apt-get update; \
sudo apt-get install docker-ce docker-ce-cli containerd.io

If you want to verify that it worked run: sudo docker run hello-world

The following explains why it is named like this: Why install docker on ubuntu should be `sudo apt-get install docker.io`?

I know that it is very late to answer the question, but it may help someone like me who spent lots off time to fetch data using hql

So the thing is you just have to write a query

Query query = session.createQuery("from Employee");

it will give you all the data list but to fetch data from this you have to write this line.

List<Employee> fetchedData = query.list();

As simple as it looks.

You can also use this code to get LayoutInflater:

LayoutInflater li = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE)

Working example, try this:

package restclient;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;

public class NetClientGet {
    public static void main(String[] args) {
        try {

            URL url = new URL("http://localhost:3002/RestWebserviceDemo/rest/json/product/dynamicData?size=5");//your url i.e fetch data from .
            HttpURLConnection conn = (HttpURLConnection) url.openConnection();
            conn.setRequestMethod("GET");
            conn.setRequestProperty("Accept", "application/json");
            if (conn.getResponseCode() != 200) {
                throw new RuntimeException("Failed : HTTP Error code : "
                        + conn.getResponseCode());
            }
            InputStreamReader in = new InputStreamReader(conn.getInputStream());
            BufferedReader br = new BufferedReader(in);
            String output;
            while ((output = br.readLine()) != null) {
                System.out.println(output);
            }
            conn.disconnect();

        } catch (Exception e) {
            System.out.println("Exception in NetClientGet:- " + e);
        }
    }
}

You can use shorthand syntax as of Twig 1.12.0

{{ foo ?: 'no' }} is the same as {{ foo ? foo : 'no' }}
{{ foo ? 'yes' }} is the same as {{ foo ? 'yes' : '' }}

If you just want to get an APK file of something you previously installed, do this:

1. Get AirDroid from Google Play
2. Access your phone using AirDroid from your PC web browser
3. Go to Apps and select the installed app
4. Click the "download" button to download the APK version of this app from your phone

You don't need to root your phone, use adb, or write anything.

Here you go:

.glowing-border {
    border: 2px solid #dadada;
    border-radius: 7px;
}

.glowing-border:focus { 
    outline: none;
    border-color: #9ecaed;
    box-shadow: 0 0 10px #9ecaed;
}

Live demo: http://jsfiddle.net/simevidas/CXUpm/1/show/

(to view the code for the demo, remove "show/" from the URL)

label { _x000D_
    display:block;_x000D_
    margin:20px;_x000D_
    width:420px;_x000D_
    overflow:auto;_x000D_
    font-family:sans-serif;_x000D_
    font-size:20px;_x000D_
    color:#444;_x000D_
    text-shadow:0 0 2px #ddd;_x000D_
    padding:20px 10px 10px 0;_x000D_
}_x000D_
_x000D_
input {_x000D_
    float:right;_x000D_
    width:200px;_x000D_
    border:2px solid #dadada;_x000D_
    border-radius:7px;_x000D_
    font-size:20px;_x000D_
    padding:5px;_x000D_
    margin-top:-10px;    _x000D_
}_x000D_
_x000D_
input:focus { _x000D_
    outline:none;_x000D_
    border-color:#9ecaed;_x000D_
    box-shadow:0 0 10px #9ecaed;_x000D_
}

<label> Aktuelles Passwort: <input type="password"> </label>_x000D_
<label> Neues Passwort: <input type="password"> </label>

Lambda can be any function. So if you had a function

def compare_person(a):
         return a.age

You could sort a list of Person (each of which having an age attribute) like this:

sorted(personArray, key=compare_person)

This way, the list would be sorted by age in ascending order.

The parameter is called lambda because python has a nifty lambda keywords for defining such functions on the fly. Instead of defining a function compare_person and passing that to sorted, you can also write:

sorted(personArray, key=lambda a: a.age)

which does the same thing.

For version 3 there doesn't appear to be "bootstrap" way to achieve this neatly.

A panel, a well and a form-group all provide some vertical spacing.

A more formal specific vertical spacing solution is, apparently, on the roadmap for bootstrap v4

https://github.com/twbs/bootstrap/issues/4286#issuecomment-36331550 https://github.com/twbs/bootstrap/issues/13532

The server at x3.chatforyoursite.com needs to output the following header:

Access-Control-Allow-Origin: http://www.example.com

Where http://www.example.com is your website address. You should check your settings on chatforyoursite.com to see if you can enable this - if not their technical support would probably be the best way to resolve this. However to answer your question, you need the remote site to allow your site to access AJAX responses client side.

https://stackoverflow.com/a/53251526/1282532 is the simplest way to serialize/deserialize property. I have two concerns regarding this approach - up to some point violation of DRY principle and high coupling between pojo and mapper.

public class Trade {
    @JsonFormat(pattern = "yyyyMMdd")
    @JsonDeserialize(using = LocalDateDeserializer.class)
    @JsonSerialize(using = LocalDateSerializer.class)
    private LocalDate tradeDate;
    @JsonFormat(pattern = "yyyyMMdd")
    @JsonDeserialize(using = LocalDateDeserializer.class)
    @JsonSerialize(using = LocalDateSerializer.class)
    private LocalDate maturityDate;
    @JsonFormat(pattern = "yyyyMMdd")
    @JsonDeserialize(using = LocalDateDeserializer.class)
    @JsonSerialize(using = LocalDateSerializer.class)
    private LocalDate entryDate;
}

In case you have POJO with multiple LocalDate fields it's better to configure mapper instead of POJO. It can be as simple as https://stackoverflow.com/a/35062824/1282532 if you are using ISO-8601 values ("2019-01-31")

In case you need to handle custom format the code will be like this:

ObjectMapper mapper = new ObjectMapper();
JavaTimeModule javaTimeModule = new JavaTimeModule();
javaTimeModule.addDeserializer(LocalDate.class, new LocalDateDeserializer(DateTimeFormatter.ofPattern("yyyyMMdd")));
javaTimeModule.addSerializer(LocalDate.class, new LocalDateSerializer(DateTimeFormatter.ofPattern("yyyyMMdd")));
mapper.registerModule(javaTimeModule);

The logic is written just once, it can be reused for multiple POJO

One way to get around this is to use implicit casting:

bool DoesEntityExist<T>(T entity, Guid guid, ITransaction transaction) where T : IGloballyIdentifiable;

calling it like so:

DoesEntityExist(entity, entityGuid, transaction);

Going a step further, you can turn it into an extension method (it will need to be declared in a static class):

static bool DoesEntityExist<T>(this T entity, Guid guid, ITransaction transaction) where T : IGloballyIdentifiable;

calling as so:

entity.DoesEntityExist(entityGuid, transaction);

I also like to build locators from up to bottom like:

//div[contains(@class,'btn-group')][./button[contains(.,'Arcade Reader')]]/button[@name='settings']

It's pretty simple, as we just search btn-group with button[contains(.,'Arcade Reader')] and get it's button[@name='settings']

That's just another option to build xPath locators

What is the profit of searching wrapper element: you can return it by method (example in java) and just build selenium constructions like:

getGroupByName("Arcade Reader").find("button[name='settings']");
getGroupByName("Arcade Reader").find("button[name='delete']");

or even simplify more

getGroupButton("Arcade Reader", "delete").click();

Here's my two cents.

IMHO the risk of a hidden row with data being excluded is too significant to let xlUp be considered a One stop answer. I agree it's simple and will work MOST of the time, but it presents the risk of understating the last row, without any warning. This could produce CATASTROPHIC results at some poinit for someone who jumped on Stack Overlow and was looking to "sure way" to capture this value.

The Find method is flawless with respect to reliably pulling the last non-blank row and it would be my One Stop Answer. However the drawback of changing the Find settings can be annoying, particularly if this is part of a UDF.

The other answers posted are okay, however the complexity gets a little excessive. Thus here's my attempt to find a balance of reliability, minimal complexity, and not using Find.

Function LastRowNumber(Optional rng As Range) As Long

If rng Is Nothing Then
    Set rng = ActiveSheet.UsedRange
Else
    Set rng = Intersect(rng.Parent.UsedRange, rng.EntireColumn)
    If rng Is Nothing Then
        LastRowNumber = 1
        Exit Function
    ElseIf isE = 0 Then
        LastRowNumber = 1
        Exit Function
    
    End If

End If

LastRowNumber = rng.Cells(rng.Rows.Count, 1).Row

Do While IsEmpty(Intersect(rng, _
    rng.Parent.Rows(LastRowNumber)))

    LastRowNumber = LastRowNumber - 1
Loop

End Function

Why this is good:

• Reasonably simple, not a lot of variables.
• Allows for multiple columns.
• Doesn't modify Find settings
• Dynamic if used as a UDF with the entire column selected.

Why this is bad:

• With very large sets of data and a massive gap between used range and last row in specified columns, this will perform slower, in rare cases SIGNIFICANTLY slower.

However, I think a One-Stop-Solution that has a drawback of messing up find settings or performing slower is a better overall solution. A user can then tinker with their settings to try to improve, knowing what's going on with their code. Using xLUp will not warn of the potential risks and they could carry on for who knows how long not knowing their code was not working correctly.

As of Python 3.2 unittest.TestCase.assertItemsEqual(doc) has been replaced by unittest.TestCase.assertCountEqual(doc) which does exactly what you are looking for, as you can read from the python standard library documentation. The method is somewhat misleadingly named but it does exactly what you are looking for.

a and b have the same elements in the same number, regardless of their order

Here a simple example which compares two lists having the same elements but in a different order.

• using assertCountEqual the test will succeed
• using assertListEqual the test will fail due to the order difference of the two lists

Here a little example script.

import unittest


class TestListElements(unittest.TestCase):
    def setUp(self):
        self.expected = ['foo', 'bar', 'baz']
        self.result = ['baz', 'foo', 'bar']

    def test_count_eq(self):
        """Will succeed"""
        self.assertCountEqual(self.result, self.expected)

    def test_list_eq(self):
        """Will fail"""
        self.assertListEqual(self.result, self.expected)

if __name__ == "__main__":
    unittest.main()

Side Note : Please make sure that the elements in the lists you are comparing are sortable.

This will cover all the possibility of a prime number . (order of the last 3 if statements is important)

   function isPrime(num){  
    if (num==0 || num==1) return false;
    if (num==2 || num==3 ) return true; 
    if (num % Math.sqrt(num)==0 ) return false;
    for (let i=2;i< Math.floor(Math.sqrt(num));i++) if ( num % i==0 ) return false;
    if ((num * num - 1) % 24 == 0) return true;        
   }

I also had same error but with codeigniter application. I changed

• my base URL in config.php to my localhost path

• in htaccess I changed RewriteBase /"my folder name in htdocs"

  and I able to login to my application.

Hope it might help.

Default way to search for recursive file, and available in most cases is

find . -name "filepattern"

It starts recursive traversing for filename or pattern from within current directory where you are positioned. With find command, you can use wildcards, and various switches, to see full list of options, type

man find

or if man pages aren't available at your system

find --help

However, there are more modern and faster tools then find, which are traversing your whole filesystem and indexing your files, one such common tool is locate or slocate/mlocate, you should check manual of your OS on how to install it, and once it's installed it needs to initiate database, if install script don't do it for you, it can be done manually by typing

sudo updatedb

And, to use it to look for some particular file type

locate filename

Or, to look for filename or patter from within current directory, you can type:

 pwd | xargs -n 1 -I {} locate "filepattern"

It will look through its database of files and quickly print out path names that match pattern that you have typed. To see full list of locate's options, type: locate --help or man locate

Additionally you can configure locate to update it's database on scheduled times via cron job, so sample cron which updates db at 1AM would look like:

0 1 * * * updatedb

These cron jobs need to be configured by root, since updatedb needs root privilege to traverse whole filesystem.

I wanted to add one more point is, if you are storing a really large number like 902054990011312 then one can easily see the difference of INT(20) and BIGINT(20). It is advisable to store in BIGINT.

you can create array follow the code below:

var arraymultidimensional = []
    arraymultidimensional = [[value1,value2],[value3,value4],[value5,value6]];

Result:
[v1][v2] position 0
[v3][v4] position 1
[v5][v6] position 2

For add to array dinamically, use the method below:

//vectorvalue format = "[value,value,...]"
function addToArray(vectorvalue){
  arraymultidimensional[arraymultidimensional.length] = vectorvalue;
}

Hope this helps. :)

search all not (word characters || space):

str.replace(/[^\w ]/, '')

Java does not allow abstract variables and/or constructor definitions in interfaces. Solution: Simply hang an abstract class between your interface and your implementation which only extends the abstract class like so:

 public interface IMyClass {

     void methodA();
     String methodB();
     Integer methodC();

 }

 public abstract class myAbstractClass implements IMyClass {
     protected String varA, varB;

     //Constructor
     myAbstractClass(String varA, String varB) {
         this.varA = varA;
         this.varB = VarB;
     }

     //Implement (some) interface methods here or leave them for the concrete class
     protected void methodA() {
         //Do something
     }

     //Add additional methods here which must be implemented in the concrete class
     protected abstract Long methodD();

     //Write some completely new methods which can be used by all subclasses
     protected Float methodE() {
         return 42.0;
     }

 }

 public class myConcreteClass extends myAbstractClass {

     //Constructor must now be implemented!
     myClass(String varA, String varB) {
         super(varA, varB);
     }

     //All non-private variables from the abstract class are available here
     //All methods not implemented in the abstract class must be implemented here

 }

You can also use an abstract class without any interface if you are SURE that you don't want to implement it along with other interfaces later. Please note that you can't create an instance of an abstract class you MUST extend it first.

(The "protected" keyword means that only extended classes can access these methods and variables.)

spyro

If you want to maintain your scroll position when you refresh, and you can do this:

if (mEventListView.getAdapter() == null) {
    EventLogAdapter eventLogAdapter = new EventLogAdapter(mContext, events);
    mEventListView.setAdapter(eventLogAdapter);
} else {
    ((EventLogAdapter)mEventListView.getAdapter()).refill(events);
}

public void refill(List<EventLog> events) {
    mEvents.clear();
    mEvents.addAll(events);
    notifyDataSetChanged();
}

For the detail information, please see Android ListView: Maintain your scroll position when you refresh.

to extend MostafaMashayekhi his answer for option two> you can also chain multiple options with a ','

[ngClass]="{'my-class': step=='step1', 'my-class2':step=='step2' }"

Also *ngIf can be used in some of these situations usually combined with a *ngFor

class="mats p" *ngIf="mat=='painted'"

I had the same problem on XAMPP for Windows when I try to install composer. I did php -v and php throwing error :

Unable to load dynamic library '/xampp/php/ext/php_bz2.dll'

It took me a while until I realized that I need to setup my XAMPP. So I run setup_xampp.bat and php return to works like a charm.

Lazy Loading? Well, it simply means that child records are not fetched immediately, but automatically as soon as you try to access them.