Correct syntax to compare values in JSTL <c:if test="${values.type}=='object'">

The comparison needs to be evaluated fully inside EL ${ ... }, not outside.

<c:if test="${values.type eq 'object'}">

As to the docs, those ${} things are not JSTL, but EL (Expression Language) which is a whole subject at its own. JSTL (as every other JSP taglib) is just utilizing it. You can find some more EL examples here.

<c:if test="#{bean.booleanValue}" />
<c:if test="#{bean.intValue gt 10}" />
<c:if test="#{bean.objectValue eq null}" />
<c:if test="#{bean.stringValue ne 'someValue'}" />
<c:if test="#{not empty bean.collectionValue}" />
<c:if test="#{not bean.booleanValue and bean.intValue ne 0}" />
<c:if test="#{bean.enumValue eq 'ONE' or bean.enumValue eq 'TWO'}" />

document.body.appendChild(i)

You could try

document.getElementsByTagName('body')[0].appendChild(i);

Now that won't do you any good if the code is running in the <head>, and running before the <body> has even been seen by the browser. If you don't want to mess with "onload" handlers, try moving your <script> block to the very end of the document instead of the <head>.

Git push error pre-receive hook declined

Go to Project settings --> Hooks --> (Under) Pre-receive hooks

Disable cp require issue reference in commits

"Not allowed to load local resource: file:///C:....jpg" Java EE Tomcat

In Chrome, you are supposed to be able to allow this capability with a runtime flag --allow-file-access-from-files

However, it looks like there is a problem with current versions of Chrome (37, 38) where this doesn't work unless you also pass the runtime flag --disable-web-security

That's an unacceptable solution, except perhaps as a short-term workaround, but it has been identified as an issue: https://code.google.com/p/chromium/issues/detail?id=379206

mysql_connect(): The mysql extension is deprecated and will be removed in the future: use mysqli or PDO instead

?php

/* Database config */

$db_host        = 'localhost';
$db_user        = '~';
$db_pass        = '~';
$db_database    = 'banners'; 

/* End config */


$mysqli = new mysqli($db_host, $db_user, $db_pass, $db_database);
/* check connection */
if (mysqli_connect_errno()) {
    printf("Connect failed: %s\n", mysqli_connect_error());
    exit();
}

?>

Replace HTML page with contents retrieved via AJAX

Here's how to do it in Prototype: $(id).update(data)

And jQuery: $('#id').replaceWith(data)

But document.getElementById(id).innerHTML=data should work too.

EDIT: Prototype and jQuery automatically evaluate scripts for you.

How can I check if a view is visible or not in Android?

If the image is part of the layout it might be "View.VISIBLE" but that doesn't mean it's within the confines of the visible screen. If that's what you're after; this will work:

Rect scrollBounds = new Rect();
scrollView.getHitRect(scrollBounds);
if (imageView.getLocalVisibleRect(scrollBounds)) {
    // imageView is within the visible window
} else {
    // imageView is not within the visible window
}

How do I change the ID of a HTML element with JavaScript?

You can modify the id without having to use getElementById

Example:

<div id = 'One' onclick = "One.id = 'Two'; return false;">One</div>

You can see it here: http://jsbin.com/elikaj/1/

Tested with Mozilla Firefox 22 and Google Chrome 60.0

indexOf and lastIndexOf in PHP?

This is the best way to do it, very simple.

$msg = "Hello this is a string";
$first_index_of_i = stripos($msg,'i');
$last_index_of_i = strripos($msg, 'i');

echo "First i : " . $first_index_of_i . PHP_EOL ."Last i : " . $last_index_of_i;

CSS transition shorthand with multiple properties?

By having the .5s delay on transitioning the opacity property, the element will be completely transparent (and thus invisible) the whole time its height is transitioning. So the only thing you will actually see is the opacity changing. So you will get the same effect as leaving the height property out of the transition :

"transition: opacity .5s .5s;"

Is that what you're wanting? If not, and you're wanting to see the height transition, you can't have an opacity of zero during the whole time that it's transitioning.

How to draw a filled circle in Java?

/***Your Code***/
public void paintComponent(Graphics g){
/***Your Code***/
    g.setColor(Color.RED);
    g.fillOval(50,50,20,20);
}

g.fillOval(x-axis,y-axis,width,height);

Read file from aws s3 bucket using node fs

This will do it:

new AWS.S3().getObject({ Bucket: this.awsBucketName, Key: keyName }, function(err, data)
{
    if (!err)
        console.log(data.Body.toString());
});

How to generate random float number in C

This generates a random float between two floats.

float RandomFloat(float min, float max){
   return ((max - min) * ((float)rand() / RAND_MAX)) + min;
}

Create a File object in memory from a string in Java

FileReader r = new FileReader(file);

Use a file reader load the file and then write its contents to a string buffer.

example

The link above shows you an example of how to accomplish this. As other post to this answer say to load a file into memory you do not need write access as long as you do not plan on making changes to the actual file.

Laravel view not found exception

This error also occurs when you try to move the whole project directory to other path. And you happened to run the following commands below BEFORE you move.

php artisan optimize --force
php artisan config:cache
php artisan route:cache

Mine error message shows like this

As you can see the old path was written in the compiled.php. So, to fix the problem. Simply run the same command AGAIN under the project folder in your new folder location.

php artisan optimize --force
php artisan config:cache
php artisan route:cache

Hope this helps.

Setting DataContext in XAML in WPF

First of all you should create property with employee details in the Employee class:

public class Employee
{
    public Employee()
    {
        EmployeeDetails = new EmployeeDetails();
        EmployeeDetails.EmpID = 123;
        EmployeeDetails.EmpName = "ABC";
    }

    public EmployeeDetails EmployeeDetails { get; set; }
}

If you don't do that, you will create instance of object in Employee constructor and you lose reference to it.

In the XAML you should create instance of Employee class, and after that you can assign it to DataContext.

Your XAML should look like this:

<Window x:Class="SampleApplication.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="MainWindow" Height="350" Width="525"
    xmlns:local="clr-namespace:SampleApplication"
   >
    <Window.Resources>
        <local:Employee x:Key="Employee" />
    </Window.Resources>
    <Grid DataContext="{StaticResource Employee}">
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto" />
            <RowDefinition Height="Auto" />
        </Grid.RowDefinitions>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="Auto" />
            <ColumnDefinition Width="200" />
        </Grid.ColumnDefinitions>

        <Label Grid.Row="0" Grid.Column="0" Content="ID:"/>
        <Label Grid.Row="1" Grid.Column="0" Content="Name:"/>
        <TextBox Grid.Column="1" Grid.Row="0" Margin="3" Text="{Binding EmployeeDetails.EmpID}" />
        <TextBox Grid.Column="1" Grid.Row="1" Margin="3" Text="{Binding EmployeeDetails.EmpName}" />
    </Grid>
</Window>

Now, after you created property with employee details you should binding by using this property:

Text="{Binding EmployeeDetails.EmpID}"

Keep only date part when using pandas.to_datetime

This worked for me on UTC Timestamp (2020-08-19T09:12:57.945888)

for di, i in enumerate(df['YourColumnName']):
    df['YourColumnName'][di] = pd.Timestamp(i)

Excel how to fill all selected blank cells with text

Here's a tricky way to do this - select the cells that you want to replace and in Excel 2010 select F5 to bring up the "goto" box. Hit the "special" button. Select "blanks" - this should select all the cells that are blank. Enter NULL or whatever you want in the formula box and hit ctrl + enter to apply to all selected cells. Easy!

ValueError: invalid literal for int () with base 10

Answer:

Your traceback is telling you that int() takes integers, you are trying to give a decimal, so you need to use float():

a = float(a)

This should work as expected:

>>> int(input("Type a number: "))
Type a number: 0.3
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ValueError: invalid literal for int() with base 10: '0.3'
>>> float(input("Type a number: "))
Type a number: 0.3
0.3

Computers store numbers in a variety of different ways. Python has two main ones. Integers, which store whole numbers (Z), and floating point numbers, which store real numbers (R). You need to use the right one based on what you require.

(As a note, Python is pretty good at abstracting this away from you, most other language also have double precision floating point numbers, for instance, but you don't need to worry about that. Since 3.0, Python will also automatically convert integers to floats if you divide them, so it's actually very easy to work with.)

Previous guess at answer before we had the traceback:

Your problem is that whatever you are typing is can't be converted into a number. This could be caused by a lot of things, for example:

>>> int(input("Type a number: "))
Type a number: -1
-1
>>> int(input("Type a number: "))
Type a number: - 1
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ValueError: invalid literal for int() with base 10: '- 1'

Adding a space between the - and 1 will cause the string not to be parsed correctly into a number. This is, of course, just an example, and you will have to tell us what input you are giving for us to be able to say for sure what the issue is.

Advice on code style:

y = [int(a)**(-2),int(a)**(-1.75),int(a)**(-1.5),int(a)**(-1.25),
            int(a)**(-1),int(a)**(-0.75),int(a)**(-0.5),int(a)**(-0.25),
            int(a)**(0),int(a)**(0.25),int(a)**(0.5),int(a)**(0.75),
            int(a)**1,int(a)**(1.25),int(a)**(1.5),int(a)**(1.75), int(a)**(2)]

This is an example of a really bad coding habit. Where you are copying something again and again something is wrong. Firstly, you use int(a) a ton of times, wherever you do this, you should instead assign the value to a variable, and use that instead, avoiding typing (and forcing the computer to calculate) the value again and again:

a = int(a)

In this example I assign the value back to a, overwriting the old value with the new one we want to use.

y = [a**i for i in x]

This code produces the same result as the monster above, without the masses of writing out the same thing again and again. It's a simple list comprehension. This also means that if you edit x, you don't need to do anything to y, it will naturally update to suit.

Also note that PEP-8, the Python style guide, suggests strongly that you don't leave spaces between an identifier and the brackets when making a function call.

OracleCommand SQL Parameters Binding

Remove single quotes around @username, and with respect to oracle use : with parameter name instead of @, like:

OracleCommand oraCommand = new OracleCommand("SELECT fullname FROM sup_sys.user_profile
                           WHERE domain_user_name = :userName", db);
oraCommand.Parameters.Add(new OracleParameter("userName", domainUser));

Source: Using Parameters

How do I set default terminal to terminator?

open dconf Editor and go to org > gnome > desktop > application > terminal and change gnome-terminal to terminator

How to prevent colliders from passing through each other?

1.) Never use MESH COLLIDER. Use combination of box and capsule collider.

2.) Check constraints in RigidBody. If you tick Freeze Position X than it will pass through the object on the X axis. (Same for y axis).

Run react-native application on iOS device directly from command line?

Actually, For the first build, please do it with Xcode and then do the following way:

brew install ios-deploy
npx react-native run-ios --device

The second command will run the app on the first connected device.

How to execute an action before close metro app WinJS

If I am not mistaken, it will be onunload event.

"Occurs when the application is about to be unloaded." - MSDN

Creating csv file with php

@Baba's answer is great. But you don't need to use explode because fputcsv takes an array as a parameter

For instance, if you have a three columns, four lines document, here's a more straight version:

header('Content-Type: text/csv');
header('Content-Disposition: attachment; filename="sample.csv"');

$user_CSV[0] = array('first_name', 'last_name', 'age');

// very simple to increment with i++ if looping through a database result 
$user_CSV[1] = array('Quentin', 'Del Viento', 34);
$user_CSV[2] = array('Antoine', 'Del Torro', 55);
$user_CSV[3] = array('Arthur', 'Vincente', 15);

$fp = fopen('php://output', 'wb');
foreach ($user_CSV as $line) {
    // though CSV stands for "comma separated value"
    // in many countries (including France) separator is ";"
    fputcsv($fp, $line, ',');
}
fclose($fp);

"Series objects are mutable and cannot be hashed" error

gene_name = no_headers.iloc[1:,[1]]

This creates a DataFrame because you passed a list of columns (single, but still a list). When you later do this:

gene_name[x]

you now have a Series object with a single value. You can't hash the Series.

The solution is to create Series from the start.

gene_type = no_headers.iloc[1:,0]
gene_name = no_headers.iloc[1:,1]
disease_name = no_headers.iloc[1:,2]

Also, where you have orph_dict[gene_name[x]] =+ 1, I'm guessing that's a typo and you really mean orph_dict[gene_name[x]] += 1 to increment the counter.

How to solve npm error "npm ERR! code ELIFECYCLE"

workaround: Remove the lock file.

rm .\package-lock.json

source: https://github.com/mapbox/node-pre-gyp/issues/298 (floriantraber)

PHP unable to load php_curl.dll extension

Usually this is an OpenSSL version mismatch error, between Apache and PHP. In case Apache loads PHP as a DSO module, its own OpenSSL versions (dlls and libs) will be used. So, in case the PHP extension requires a newer version, it may not find the appropriate interface inside the Apache-loaded DLLS and it will fail to work.

Since you need the PHP extension to load, you need the relevant DLL files to be at least the version of what the PHP module asks for. Supposing that you 're using lastest builds for both Apache and PHP and both having been built with the same MVC version, you can copy the following files:

libcrypto-1_1.dll
libcrypto-1_1-x64.dll
libcurl.dll
libsasl.dll
libssh2.dll
libssl-1_1.dll
libssl-1_1-x64.dll
nghttp2.dll
libeay32.dll (if existing in your PHP distribution)
ssleay32.dll (if existing in your PHP distribution)

from the PHP root folder to the Apache2/bin folder, in case you 're confident that the PHP build is newer than the Apache build.

In the opposite case, you can copy the same files from the Apache BIN to the PHP root.

In any case, backup the contents of the APache and PHP folders beforehand.

Adding the PHP path as an enviromental variable will give priority to this path for loading the relevant DLLs and may solve the problem. However, you lose in server portability. Additionally, if you have also added the Apache PATH as a variable and the OpenSSL versions are way different (up to loading different linked DLL files), a lot of shit may happen.

Is try-catch like error handling possible in ASP Classic?

Some scenarios don't always allow developers to switch scripting language.

My preference is definitely for JavaScript (and I have used it in new projects). However, maintaining older projects is still required and necessary. Unfortunately, these are written in VBScript.

So even though this solution doesn't offer true "try/catch" functionaility, the result is the same, and that's good enough for me to get the job done.

Working around MySQL error "Deadlock found when trying to get lock; try restarting transaction"

Note that if you use SELECT FOR UPDATE to perform a uniqueness check before an insert, you will get a deadlock for every race condition unless you enable the innodb_locks_unsafe_for_binlog option. A deadlock-free method to check uniqueness is to blindly insert a row into a table with a unique index using INSERT IGNORE, then to check the affected row count.

add below line to my.cnf file

innodb_locks_unsafe_for_binlog = 1

1 - ON
0 - OFF

Transport security has blocked a cleartext HTTP

NOTE: The exception domain in your plist should be in LOWER-CASE.

Example: you have named your machine "MyAwesomeMacbook" under Settings->Sharing; your server (for test purposes) is running on MyAwesomeMacbook.local:3000, and your app needs to send a request to http://MyAwesomeMacbook.local:3000/files..., your plist you will need to specify "myawesomemacbook.local" as the exception domain.

Your info.plist would contain...

<key>NSAppTransportSecurity</key>
<dict>
  <key>NSExceptionDomains</key>
  <dict>
    <key>myawesomemacbook.local</key>
    <dict>
      <!--Include to allow subdomains-->
      <key>NSIncludesSubdomains</key>
      <true/>
      <!--Include to allow HTTP requests-->
      <key>NSExceptionAllowsInsecureHTTPLoads</key>
      <true/>
    </dict>
  </dict>
</dict>

Should I use @EJB or @Inject

@Inject can inject any bean, while @EJB can only inject EJBs. You can use either to inject EJBs, but I'd prefer @Inject everywhere.

What is the correct target for the JAVA_HOME environment variable for a Linux OpenJDK Debian-based distribution?

Updated answer that will solve your problem and also just a general good how-to for installing Oracle Java 7 on Ubuntu can be found here: http://www.wikihow.com/Install-Oracle-Java-on-Ubuntu-Linux

Xcode error "Could not find Developer Disk Image"

This message appears when your version of Xcode is too old for the device's version of iOS. Upgrade Xcode to the latest.

If the App Store doesn't offer an update for Xcode, upgrade to the latest Mac OS. In the past, Apple has been rather aggressive about dropping support for past versions of Mac OS X in the latest Xcode.

EDIT: yes, this error started popping up all over again. :) Xcode 7.3.1, which is the latest one that's available for MacOS 10.11 (El Capitan), doesn't support iOS 10. You need MacOS Sierra (and possibly a new Mac).

Passing multiple values for a single parameter in Reporting Services

If you want to pass multiple values to RS via a query string all you need to do is repeat the report parameter for each value.

For example; I have a RS column called COLS and this column expects one or more values.

&rp:COLS=1&rp:COLS=1&rp:COLS=5 etc..

How do I log a Python error with debug information?

If "debugging information" means the values present when exception was raised, then logging.exception(...) won't help. So you'll need a tool that logs all variable values along with the traceback lines automatically.

Out of the box you'll get log like

2020-03-30 18:24:31 main ERROR   File "./temp.py", line 13, in get_ratio
2020-03-30 18:24:31 main ERROR     return height / width
2020-03-30 18:24:31 main ERROR       height = 300
2020-03-30 18:24:31 main ERROR       width = 0
2020-03-30 18:24:31 main ERROR builtins.ZeroDivisionError: division by zero

Have a look at some pypi tools, I'd name:

Some of them give you pretty crash messages:

But you might find some more on pypi

Configuring angularjs with eclipse IDE

Netbeans 8.0 (beta at the time of this post) has Angular support as well as HTML5 support.

Check out this Oracle article: https://blogs.oracle.com/geertjan/entry/integrated_angularjs_development

How to get a key in a JavaScript object by its value?

Since the values are unique, it should be possible to add the values as an additional set of keys. This could be done with the following shortcut.

var foo = {};
foo[foo.apple = "an apple"] = "apple";
foo[foo.pear = "a pear"] = "pear";

This would permit retrieval either via the key or the value:

var key = "apple";
var value = "an apple";

console.log(foo[value]); // "apple"
console.log(foo[key]); // "an apple"

This does assume that there are no common elements between the keys and values.

Xcode process launch failed: Security

"If you get this, the app has installed on your device. You have to tap the icon. It will ask you if you really want to run it. Say “yes” and then Build & Run again."

To add to that, this only holds true the moment you get the error, if you click OK, then tap on the app. It will do nothing. Scratched my head on that for 30 odd minutes, searching for alternative ways to address the problem.

Open Facebook Page in Facebook App (if installed) on Android

Here's a solution that mixes the code by Jared Rummler and AndroidMechanic.

Note: fb://facewebmodal/f?href= redirects to a weird facebook page that doesn't have the like and other important buttons, which is why I try fb://page/. It works fine with the current Facebook version (126.0.0.21.77, June 1st 2017). The catch might be useless, I left it just in case.

public static String getFacebookPageURL(Context context)
{
    final String FACEBOOK_PAGE_ID = "123456789";
    final String FACEBOOK_URL = "MyFacebookPage";

    if(appInstalledOrNot(context, "com.facebook.katana"))
    {
        try
        {
            return "fb://page/" + FACEBOOK_PAGE_ID;
            // previous version, maybe relevant for old android APIs ?
            // return "fb://facewebmodal/f?href=" + FACEBOOK_URL;
        }
        catch(Exception e) {}
    }
    else
    {
        return FACEBOOK_URL;
    }

}

Here's the appInstalledOrNot function which I took (and modified) from Aerrow's answer to this post

private static boolean appInstalledOrNot(Context context, String uri)
{
    PackageManager pm = context.getPackageManager();
    try
    {
        pm.getPackageInfo(uri, PackageManager.GET_ACTIVITIES);
        return true;
    }
    catch(PackageManager.NameNotFoundException e)
    {
    }

    return false;
}

How to get the Facebook ID of a page:

Go to your page
Right-click and View Page Source
Find in page: fb://page/?id=
Here you go!

Convert UTF-8 with BOM to UTF-8 with no BOM in Python

This is my implementation to convert any kind of encoding to UTF-8 without BOM and replacing windows enlines by universal format:

def utf8_converter(file_path, universal_endline=True):
    '''
    Convert any type of file to UTF-8 without BOM
    and using universal endline by default.

    Parameters
    ----------
    file_path : string, file path.
    universal_endline : boolean (True),
                        by default convert endlines to universal format.
    '''

    # Fix file path
    file_path = os.path.realpath(os.path.expanduser(file_path))

    # Read from file
    file_open = open(file_path)
    raw = file_open.read()
    file_open.close()

    # Decode
    raw = raw.decode(chardet.detect(raw)['encoding'])
    # Remove windows end line
    if universal_endline:
        raw = raw.replace('\r\n', '\n')
    # Encode to UTF-8
    raw = raw.encode('utf8')
    # Remove BOM
    if raw.startswith(codecs.BOM_UTF8):
        raw = raw.replace(codecs.BOM_UTF8, '', 1)

    # Write to file
    file_open = open(file_path, 'w')
    file_open.write(raw)
    file_open.close()
    return 0

Is there a jQuery unfocus method?

This works for me:

// Document click blurer
$(document).on('mousedown', '*:not(input,textarea)', function() {
    try {
        var $a = $(document.activeElement).prop("disabled", true);
        setTimeout(function() {
            $a.prop("disabled", false);
        });
    } catch (ex) {}
});

URL encode sees “&” (ampersand) as “&” HTML entity

Without seeing your code, it's hard to answer other than a stab in the dark. I would guess that the string you're passing to encodeURIComponent(), which is the correct method to use, is coming from the result of accessing the innerHTML property. The solution is to get the innerText/textContent property value instead:

var str, 
    el = document.getElementById("myUrl");

if ("textContent" in el)
    str = encodeURIComponent(el.textContent);
else
    str = encodeURIComponent(el.innerText);

If that isn't the case, you can use the replace() method to replace the HTML entity:

encodeURIComponent(str.replace(/&amp;/g, "&"));

Shortcut to create properties in Visual Studio?

What I liked in the IDE was that I was able to write a few variables like:

    private int id;
    private string name;
    private string version;
    private string description;
    private string status;
    private string symbol;

Notice, that the variable names start with small letters, and then select the whole block, and press Ctrl+R, Ctrl+E, Apply. The properties are generated with the capital letter:

    public int Id
    {
        get
        {
            return id;
        }

        set
        {
            id = value;
        }
    }

etc.

Sending SOAP request using Python Requests

It is indeed possible.

Here is an example calling the Weather SOAP Service using plain requests lib:

import requests
url="http://wsf.cdyne.com/WeatherWS/Weather.asmx?WSDL"
#headers = {'content-type': 'application/soap+xml'}
headers = {'content-type': 'text/xml'}
body = """<?xml version="1.0" encoding="UTF-8"?>
         <SOAP-ENV:Envelope xmlns:ns0="http://ws.cdyne.com/WeatherWS/" xmlns:ns1="http://schemas.xmlsoap.org/soap/envelope/" 
            xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/">
            <SOAP-ENV:Header/>
              <ns1:Body><ns0:GetWeatherInformation/></ns1:Body>
         </SOAP-ENV:Envelope>"""

response = requests.post(url,data=body,headers=headers)
print response.content

Some notes:

The headers are important. Most SOAP requests will not work without the correct headers. application/soap+xml is probably the more correct header to use (but the weatherservice prefers text/xml
This will return the response as a string of xml - you would then need to parse that xml.
For simplicity I have included the request as plain text. But best practise would be to store this as a template, then you can load it using jinja2 (for example) - and also pass in variables.

For example:

from jinja2 import Environment, PackageLoader
env = Environment(loader=PackageLoader('myapp', 'templates'))
template = env.get_template('soaprequests/WeatherSericeRequest.xml')
body = template.render()

Some people have mentioned the suds library. Suds is probably the more correct way to be interacting with SOAP, but I often find that it panics a little when you have WDSLs that are badly formed (which, TBH, is more likely than not when you're dealing with an institution that still uses SOAP ;) ).

You can do the above with suds like so:

from suds.client import Client
url="http://wsf.cdyne.com/WeatherWS/Weather.asmx?WSDL"
client = Client(url)
print client ## shows the details of this service

result = client.service.GetWeatherInformation() 
print result

Note: when using suds, you will almost always end up needing to use the doctor!

Finally, a little bonus for debugging SOAP; TCPdump is your friend. On Mac, you can run TCPdump like so:

sudo tcpdump -As 0

This can be helpful for inspecting the requests that actually go over the wire.

The above two code snippets are also available as gists:

How can I get date and time formats based on Culture Info?

You can retrieve the format strings from the CultureInfo DateTimeFormat property, which is a DateTimeFormatInfo instance. This in turn has properties like ShortDatePattern and ShortTimePattern, containing the format strings:

CultureInfo us = new CultureInfo("en-US");
string shortUsDateFormatString = us.DateTimeFormat.ShortDatePattern;
string shortUsTimeFormatString = us.DateTimeFormat.ShortTimePattern;

CultureInfo uk = new CultureInfo("en-GB");
string shortUkDateFormatString = uk.DateTimeFormat.ShortDatePattern;
string shortUkTimeFormatString = uk.DateTimeFormat.ShortTimePattern;

If you simply want to format the date/time using the CultureInfo, pass it in as your IFormatter when converting the DateTime to a string, using the ToString method:

string us = myDate.ToString(new CultureInfo("en-US"));
string uk = myDate.ToString(new CultureInfo("en-GB"));

No default constructor found; nested exception is java.lang.NoSuchMethodException with Spring MVC?

In my case I forgot to add @RequestBody annotation to the method argument:

public TestController(@RequestBody KeeperClient testClient) {
        TestController.testClient = testClient;
    }

How to find a value in an excel column by vba code Cells.Find

Just for sake of completeness, you can also use the same technique above with excel tables.

In the example below, I'm looking of a text in any cell of a Excel Table named "tblConfig", place in the sheet named Config that normally is set to be hidden. I'm accepting the defaults of the Find method.

Dim list As ListObject
Dim config As Worksheet
Dim cell as Range


Set config = Sheets("Config")
Set list = config.ListObjects("tblConfig")

'search in any cell of the data range of excel table
Set cell = list.DataBodyRange.Find(searchTerm)

If cell Is Nothing Then
    'when information is not found
Else
    'when information is found
End If

What's the difference between primitive and reference types?

Primitives vs. References

First :-

Primitive types are the basic types of data: byte, short, int, long, float, double, boolean, char. Primitive variables store primitive values. Reference types are any instantiable class as well as arrays: String, Scanner, Random, Die, int[], String[], etc. Reference variables store addresses to locations in memory for where the data is stored.

Second:-

Primitive types store values but Reference type store handles to objects in heap space. Remember, reference variables are not pointers like you might have seen in C and C++, they are just handles to objects, so that you can access them and make some change on object's state.

typesafe select onChange event using reactjs and typescript

JSX:

<select value={ this.state.foo } onChange={this.handleFooChange}>
    <option value="A">A</option>
    <option value="B">B</option>
</select>

TypeScript:

private handleFooChange = (event: React.FormEvent<HTMLSelectElement>) => {
    const element = event.target as HTMLSelectElement;
    this.setState({ foo: element.value });
}

Setting initial values on load with Select2 with Ajax

I`ve added

initSelection: function (element, callback) {

      callback({ id: 1, text: 'Text' });
}

BUT also

.select2('val', []);

at the end.

This solved my issue.

Loop through files in a folder using VBA?

Dir function loses focus easily when I handle and process files from other folders.

I've gotten better results with the component FileSystemObject.

Full example is given here:

http://www.xl-central.com/list-files-fso.html

Don't forget to set a reference in the Visual Basic Editor to Microsoft Scripting Runtime (by using Tools > References)

Give it a try!

How to take backup of a single table in a MySQL database?

mysqldump can take a tbl_name parameter, so that it only backups the given tables.

mysqldump -u -p yourdb yourtable > c:\backups\backup.sql

Invoke or BeginInvoke cannot be called on a control until the window handle has been created

var that = this; // this is a form
(new Thread(()=> {

    var action= new Action(() => {
       something
    }));

    if(!that.IsDisposed)
    {
        if(that.IsHandleCreated)
        {
            //if (that.InvokeRequired)
                that.BeginInvoke(action);
            //else
            // action.Invoke();
        }
        else
            that.HandleCreated+=(sender,event) => {
                action.Invoke();
            };
    }


})).Start();

Android: adbd cannot run as root in production builds

You have to grant the Superuser right to the shell app (com.anroid.shell). In my case, I use Magisk to root my phone Nexsus 6P (Oreo 8.1). So I can grant Superuser right in the Magisk Manager app, whih is in the left upper option menu.

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

<form id="mailajob" method="post" action="emailthijob.php">
    <input type="hidden" name="action" value="emailjob" />
    <input type="hidden" name="jid" value="<?php echo $jobid; ?>" />
</form>

<a class="emailjob" onclick="document.getElementById('mailajob').submit();">Email this job</a>

how to check if string value is in the Enum list?

You can use:

 Enum.IsDefined(typeof(Age), youragevariable)

jQuery get the name of a select option

For anyone who comes across this late, like me.

As others have stated, name isn't a valid attribute of an option element. Combining the accepted answer above with the answer from this other question, you get:

$(this).find('option:selected').text();

Installing lxml module in python

For RHEL/CentOS, run "python --version" command to find out Python version. E.g. below:

$ python --version 
  Python 2.7.12

Now run "sudo yum search lxml" to find out python*-lxml package.

$ sudo yum search lxml
Failed to set locale, defaulting to C
Loaded plugins: priorities, update-motd, upgrade-helper
1014 packages excluded due to repository priority protections
============================================================================================================= N/S matched: lxml =============================================================================================================
python26-lxml-docs.noarch : Documentation for python-lxml
python27-lxml-docs.noarch : Documentation for python-lxml
python26-lxml.x86_64 : ElementTree-like Python bindings for libxml2 and libxslt
python27-lxml.x86_64 : ElementTree-like Python bindings for libxml2 and libxslt

Now you can choose package as per your Python version and run command like below:

$ sudo yum install python27-lxml.x86_64

How to get height of Keyboard?

Update Swift 4.2

private func setUpObserver() {
    NotificationCenter.default.addObserver(self, selector: .keyboardWillShow, name: UIResponder.keyboardWillShowNotification, object: nil)
}

selector method:

@objc fileprivate func keyboardWillShow(notification:NSNotification) {
    if let keyboardRectValue = (notification.userInfo?[UIResponder.keyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue {
        let keyboardHeight = keyboardRectValue.height
    }
}

extension:

private extension Selector {
    static let keyboardWillShow = #selector(YourViewController.keyboardWillShow(notification:)) 
}

Update Swift 3.0

private func setUpObserver() {
    NotificationCenter.default.addObserver(self, selector: .keyboardWillShow, name: .UIKeyboardWillShow, object: nil)
}

selector method:

@objc fileprivate func keyboardWillShow(notification:NSNotification) {
    if let keyboardRectValue = (notification.userInfo?[UIKeyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue {
        let keyboardHeight = keyboardRectValue.height
    }
}

extension:

private extension Selector {
    static let keyboardWillShow = #selector(YourViewController.keyboardWillShow(notification:)) 
}

Tip

UIKeyboardDidShowNotification or UIKeyboardWillShowNotification might called twice and got different result, this article explained why called twice.

In Swift 2.2

Swift 2.2 deprecates using strings for selectors and instead introduces new syntax: #selector.

Something like:

private func setUpObserver() {

    NSNotificationCenter.defaultCenter().addObserver(self, selector: .keyboardWillShow, name: UIKeyboardWillShowNotification, object: nil)
}

selector method:

@objc private func keyboardWillShow(notification:NSNotification) {

    let userInfo:NSDictionary = notification.userInfo!
    let keyboardFrame:NSValue = userInfo.valueForKey(UIKeyboardFrameEndUserInfoKey) as! NSValue
    let keyboardRectangle = keyboardFrame.CGRectValue()
    let keyboardHeight = keyboardRectangle.height
    editorBottomCT.constant = keyboardHeight
}

extension:

    private extension Selector {

    static let keyboardWillShow = #selector(YourViewController.keyboardWillShow(_:)) 
}

Is < faster than <=?

Maybe the author of that unnamed book has read that a > 0 runs faster than a >= 1 and thinks that is true universally.

But it is because a 0 is involved (because CMP can, depending on the architecture, replaced e.g. with OR) and not because of the <.

How to create a Multidimensional ArrayList in Java?

Once I required 2-D arrayList and I created using List and ArrayList and the code is as follows:

import java.util.*;

public class ArrayListMatrix {

    public static void main(String args[]){

        List<ArrayList<Integer>> a = new ArrayList<>();

        ArrayList<Integer> a1 = new ArrayList<Integer>();
        ArrayList<Integer> a2 = new ArrayList<Integer>();
        ArrayList<Integer> a3 = new ArrayList<Integer>();


        a1.add(1);
        a1.add(2);
        a1.add(3);

        a2.add(4);
        a2.add(5);
        a2.add(6);

        a3.add(7);
        a3.add(8);
        a3.add(9);

        a.add(a1);
        a.add(a2);
        a.add(a3);


        for(ArrayList obj:a){

            ArrayList<Integer> temp = obj;

            for(Integer job : temp){
                System.out.print(job+" ");
            }
            System.out.println();
        }
    }
}

Output:

1 2 3

4 5 6

7 8 9

Source : https://www.codepuran.com/java/2d-matrix-arraylist-collection-class-java/

Good examples using java.util.logging

java.util.logging keeps you from having to tote one more jar file around with your application, and it works well with a good Formatter.

In general, at the top of every class, you should have:

private static final Logger LOGGER = Logger.getLogger( ClassName.class.getName() );

Then, you can just use various facilities of the Logger class.

Use Level.FINE for anything that is debugging at the top level of execution flow:

LOGGER.log( Level.FINE, "processing {0} entries in loop", list.size() );

Use Level.FINER / Level.FINEST inside of loops and in places where you may not always need to see that much detail when debugging basic flow issues:

LOGGER.log( Level.FINER, "processing[{0}]: {1}", new Object[]{ i, list.get(i) } );

Use the parameterized versions of the logging facilities to keep from generating tons of String concatenation garbage that GC will have to keep up with. Object[] as above is cheap, on the stack allocation usually.

With exception handling, always log the complete exception details:

try {
    ...something that can throw an ignorable exception
} catch( Exception ex ) {
    LOGGER.log( Level.SEVERE, ex.toString(), ex );
}

I always pass ex.toString() as the message here, because then when I "grep -n" for "Exception" in log files, I can see the message too. Otherwise, it is going to be on the next line of output generated by the stack dump, and you have to have a more advanced RegEx to match that line too, which often gets you more output than you need to look through.

Adding quotes to a string in VBScript

You have to use double double quotes to escape the double quotes (lol):

g = "abcd """ & a & """"

Passing data between different controller action methods

If you need to pass data from one controller to another you must pass data by route values.Because both are different request.if you send data from one page to another then you have to user query string(same as route values).

But you can do one trick :

In your calling action call the called action as a simple method :

public class ServerController : Controller
{
 [HttpPost]
 public ActionResult ApplicationPoolsUpdate(ServiceViewModel viewModel)
 {
      XDocument updatedResultsDocument = myService.UpdateApplicationPools();
      ApplicationPoolController pool=new ApplicationPoolController(); //make an object of ApplicationPoolController class.

      return pool.UpdateConfirmation(updatedResultsDocument); // call the ActionMethod you want as a simple method and pass the model as an argument.
      // Redirect to ApplicationPool controller and pass
      // updatedResultsDocument to be used in UpdateConfirmation action method
 }
}

T-SQL: Selecting rows to delete via joins

Was trying to do this with an access database and found I needed to use a.* right after the delete.

DELETE a.*
FROM TableA AS a
INNER JOIN TableB AS b
ON a.BId = b.BId
WHERE [filter condition]

Git SSH error: "Connect to host: Bad file number"

Maybe your firewall or a blocker application (PeerBlock etc.) is blocking your port

switch case statement error: case expressions must be constant expression

I would like to mention that, I came across the same situation when I tried adding a library into my project. All of a sudden all switch statements started to show errors!

Now I tried to remove the library which I added, even then it did not work. how ever "when I cleaned the project" all the errors just went off !

Stop UIWebView from "bouncing" vertically?

Here's two newer potential solutions. Apparently, you can use jqtouch or pastrykit to disable scrolling. However, I haven't got these to work. You might be more competent.

turning off vertical scrolling

digging into pastrykit

How to get element-wise matrix multiplication (Hadamard product) in numpy?

just do this:

import numpy as np

a = np.array([[1,2],[3,4]])
b = np.array([[5,6],[7,8]])

a * b

Dynamic LINQ OrderBy on IEnumerable<T> / IQueryable<T>

Thanks to Maarten (Query a collection using PropertyInfo object in LINQ) I got this solution:

myList.OrderByDescending(x => myPropertyInfo.GetValue(x, null)).ToList();

In my case I was working on a "ColumnHeaderMouseClick" (WindowsForm) so just found the specific Column pressed and its correspondent PropertyInfo:

foreach (PropertyInfo column in (new Process()).GetType().GetProperties())
{
    if (column.Name == dgvProcessList.Columns[e.ColumnIndex].Name)
    {}
}

PropertyInfo column = (new Process()).GetType().GetProperties().Where(x => x.Name == dgvProcessList.Columns[e.ColumnIndex].Name).First();

(be sure to have your column Names matching the object Properties)

Cheers

Convert ASCII number to ASCII Character in C

You can assign int to char directly.

int a = 65;
char c = a;
printf("%c", c);

In fact this will also work.

printf("%c", a);  // assuming a is in valid range

How do I negate a test with regular expressions in a bash script?

You had it right, just put a space between the ! and the [[ like if ! [[

Importing CommonCrypto in a Swift framework

I've added some cocoapods magic to jjrscott's answer in case you need to use CommonCrypto in your cocoapods library.

1) Add this line to your podspec:

s.script_phase = { :name => 'CommonCrypto', :script => 'sh $PROJECT_DIR/../../install_common_crypto.sh', :execution_position => :before_compile }

2) Save this in your library folder or wherever you like (however don't forget to change the script_phase accordingly ...)

# This if-statement means we'll only run the main script if the
# CommonCrypto.framework directory doesn't exist because otherwise
# the rest of the script causes a full recompile for anything
# where CommonCrypto is a dependency
# Do a "Clean Build Folder" to remove this directory and trigger
# the rest of the script to run
FRAMEWORK_DIR="${BUILT_PRODUCTS_DIR}/CommonCrypto.framework"

if [ -d "${FRAMEWORK_DIR}" ]; then
echo "${FRAMEWORK_DIR} already exists, so skipping the rest of the script."
exit 0
fi

mkdir -p "${FRAMEWORK_DIR}/Modules"
echo "module CommonCrypto [system] {
    header "${SDKROOT}/usr/include/CommonCrypto/CommonCrypto.h"
    export *
}" >> "${FRAMEWORK_DIR}/Modules/module.modulemap"

ln -sf "${SDKROOT}/usr/include/CommonCrypto" "${FRAMEWORK_DIR}/Headers"

Works like a charm :)

Fastest way to reset every value of std::vector<int> to 0

How about the assign member function?

some_vector.assign(some_vector.size(), 0);

how to create a list of lists

First of all do not use list as a variable name- that is a builtin function.

I'm not super clear of what you're asking (a little more context would help), but maybe this is helpful-

my_list = []
my_list.append(np.genfromtxt('temp.txt', usecols=3, dtype=[('floatname','float')], skip_header=1))
my_list.append(np.genfromtxt('temp2.txt', usecols=3, dtype=[('floatname','float')], skip_header=1))

That will create a list (a type of mutable array in python) called my_list with the output of the np.getfromtext() method in the first 2 indexes.

The first can be referenced with my_list[0] and the second with my_list[1]

How to convert an IPv4 address into a integer in C#?

@Davy Ladman your solution with shift are corrent but only for ip starting with number less or equal 99, infact first octect must be cast up to long.

Anyway convert back with long type is quite difficult because store 64 bit (not 32 for Ip) and fill 4 bytes with zeroes

static uint ToInt(string addr)
{
   return BitConverter.ToUInt32(IPAddress.Parse(addr).GetAddressBytes(), 0);
}

static string ToAddr(uint address)
{
    return new IPAddress(address).ToString();
}

Enjoy!

Massimo

JPA mapping: "QuerySyntaxException: foobar is not mapped..."

I got the same error while using other one entity, He was annotating the class wrongly by using the table name inside the @Entity annotation without using the @Table annotation

The correct format should be

@Entity //default name similar to class name 'FooBar' OR @Entity( name = "foobar" ) for differnt entity name
@Table( name = "foobar" ) // Table name 
public class FooBar{

How to make java delay for a few seconds?

move the System.out statement to finally block.

count number of rows in a data frame in R based on group

library(plyr)
ddply(data, .(MONTH-YEAR), nrow)

This will give you the answer, if "MONTH-YEAR" is a variable. First, try unique(data$MONTH-YEAR) and see if it returns unique values (no duplicates).

Then above simple split-apply-combine will return what you are looking for.

Webdriver Screenshot

Yes, we have a way to get screenshot extension of .png using python webdriver

use below code if you working in python webriver.it is very simple.

driver.save_screenshot('D\folder\filename.png')

CentOS 64 bit bad ELF interpreter

You're on a 64-bit system, and don't have 32-bit library support installed.

To install (baseline) support for 32-bit executables

(if you don't use sudo in your setup read note below)

Most desktop Linux systems in the Fedora/Red Hat family:

 pkcon install glibc.i686

Possibly some desktop Debian/Ubuntu systems?:

pkcon install ia32-libs

Fedora or newer Red Hat, CentOS:

 sudo dnf install glibc.i686

Older RHEL, CentOS:

   sudo yum install glibc.i686

Even older RHEL, CentOS:

  sudo yum install glibc.i386

Debian or Ubuntu:

   sudo apt-get install ia32-libs

should grab you the (first, main) library you need.

Once you have that, you'll probably need support libs

Anyone needing to install glibc.i686 or glibc.i386 will probably run into other library dependencies, as well. To identify a package providing an arbitrary library, you can use

 ldd /usr/bin/YOURAPPHERE

if you're not sure it's in /usr/bin you can also fall back on

 ldd $(which YOURAPPNAME)

The output will look like this:

    linux-gate.so.1 =>  (0xf7760000)
    libpthread.so.0 => /lib/libpthread.so.0 (0xf773e000)
    libSM.so.6 => not found

Check for missing libraries (e.g. libSM.so.6 in the above output), and for each one you need to find the package that provides it.

Commands to find the package per distribution family

Fedora/Red Hat Enterprise/CentOS:

 dnf provides /usr/lib/libSM.so.6

or, on older RHEL/CentOS:

 yum provides /usr/lib/libSM.so.6

or, on Debian/Ubuntu:

first, install and download the database for apt-file

 sudo apt-get install apt-file && apt-file update

then search with

 apt-file find libSM.so.6

Note the prefix path /usr/lib in the (usual) case; rarely, some libraries still live under /lib for historical reasons … On typical 64-bit systems, 32-bit libraries live in /usr/lib and 64-bit libraries live in /usr/lib64.

(Debian/Ubuntu organise multi-architecture libraries differently.)

Installing packages for missing libraries

The above should give you a package name, e.g.:

libSM-1.2.0-2.fc15.i686 : X.Org X11 SM runtime library
Repo        : fedora
Matched from:
Filename    : /usr/lib/libSM.so.6

In this example the name of the package is libSM and the name of the 32bit version of the package is libSM.i686.

You can then install the package to grab the requisite library using pkcon in a GUI, or sudo dnf/yum/apt-get as appropriate…. E.g pkcon install libSM.i686. If necessary you can specify the version fully. E.g sudo dnf install ibSM-1.2.0-2.fc15.i686.

Some libraries will have an “epoch” designator before their name; this can be omitted (the curious can read the notes below).

Notes

Warning

Incidentially, the issue you are facing either implies that your RPM (resp. DPkg/DSelect) database is corrupted, or that the application you're trying to run wasn't installed through the package manager. If you're new to Linux, you probably want to avoid using software from sources other than your package manager, whenever possible...

If you don't use "sudo" in your set-up

Type

su -c

every time you see sudo, eg,

su -c dnf install glibc.i686

About the epoch designator in library names

The “epoch” designator before the name is an artifact of the way that the underlying RPM libraries handle version numbers; e.g.

2:libpng-1.2.46-1.fc16.i686 : A library of functions for manipulating PNG image format files
Repo        : fedora
Matched from:
Filename    : /usr/lib/libpng.so.3

Here, the 2: can be omitted; just pkcon install libpng.i686 or sudo dnf install libpng-1.2.46-1.fc16.i686. (It vaguely implies something like: at some point, the version number of the libpng package rolled backwards, and the “epoch” had to be incremented to make sure the newer version would be considered “newer” during updates. Or something similar happened. Twice.)

Updated to clarify and cover the various package manager options more fully (March, 2016)

What exactly is Spring Framework for?

Basically Spring is a framework for dependency-injection which is a pattern that allows building very decoupled systems.

The problem

For example, suppose you need to list the users of the system and thus declare an interface called UserLister:

public interface UserLister {
    List<User> getUsers();
}

And maybe an implementation accessing a database to get all the users:

public class UserListerDB implements UserLister {
    public List<User> getUsers() {
        // DB access code here
    }
}

In your view you'll need to access an instance (just an example, remember):

public class SomeView {
    private UserLister userLister;

    public void render() {
        List<User> users = userLister.getUsers();
        view.render(users);
    }
}

Note that the code above hasn't initialized the variable userLister. What should we do? If I explicitly instantiate the object like this:

UserLister userLister = new UserListerDB();

...I'd couple the view with my implementation of the class that access the DB. What if I want to switch from the DB implementation to another that gets the user list from a comma-separated file (remember, it's an example)? In that case, I would go to my code again and change the above line to:

UserLister userLister = new UserListerCommaSeparatedFile();

This has no problem with a small program like this but... What happens in a program that has hundreds of views and a similar number of business classes? The maintenance becomes a nightmare!

Spring (Dependency Injection) approach

What Spring does is to wire the classes up by using an XML file or annotations, this way all the objects are instantiated and initialized by Spring and injected in the right places (Servlets, Web Frameworks, Business classes, DAOs, etc, etc, etc...).

Going back to the example in Spring we just need to have a setter for the userLister field and have either an XML file like this:

<bean id="userLister" class="UserListerDB" />

<bean class="SomeView">
    <property name="userLister" ref="userLister" />
</bean>

or more simply annotate the filed in our view class with @Inject:

@Inject
private UserLister userLister;

This way when the view is created it magically will have a UserLister ready to work.

List<User> users = userLister.getUsers();  // This will actually work
                                           // without adding any line of code

It is great! Isn't it?

What if you want to use another implementation of your UserLister interface? Just change the XML.
What if don't have a UserLister implementation ready? Program a temporal mock implementation of UserLister and ease the development of the view.
What if I don't want to use Spring anymore? Just don't use it! Your application isn't coupled to it. Inversion of Control states: "The application controls the framework, not the framework controls the application".

There are some other options for Dependency Injection around there, what in my opinion has made Spring so famous besides its simplicity, elegance and stability is that the guys of SpringSource have programmed many many POJOs that help to integrate Spring with many other common frameworks without being intrusive in your application. Also, Spring has several good subprojects like Spring MVC, Spring WebFlow, Spring Security and again a loooong list of etceteras.

Hope this helps. Anyway, I encourage you to read Martin Fowler's article about Dependency Injection and Inversion of Control because he does it better than me. ~~After understanding the basics take a look at Spring Documentation~~, in my opinion, it is used to be the best Spring book ever.

Scheduling Python Script to run every hour accurately

For apscheduler < 3.0, see Unknown's answer.

For apscheduler > 3.0

from apscheduler.schedulers.blocking import BlockingScheduler

sched = BlockingScheduler()

@sched.scheduled_job('interval', seconds=10)
def timed_job():
    print('This job is run every 10 seconds.')

@sched.scheduled_job('cron', day_of_week='mon-fri', hour=10)
def scheduled_job():
    print('This job is run every weekday at 10am.')

sched.configure(options_from_ini_file)
sched.start()

Update:

apscheduler documentation.

This for apscheduler-3.3.1 on Python 3.6.2.

"""
Following configurations are set for the scheduler:

 - a MongoDBJobStore named “mongo”
 - an SQLAlchemyJobStore named “default” (using SQLite)
 - a ThreadPoolExecutor named “default”, with a worker count of 20
 - a ProcessPoolExecutor named “processpool”, with a worker count of 5
 - UTC as the scheduler’s timezone
 - coalescing turned off for new jobs by default
 - a default maximum instance limit of 3 for new jobs
"""

from pytz import utc
from apscheduler.schedulers.blocking import BlockingScheduler
from apscheduler.jobstores.sqlalchemy import SQLAlchemyJobStore
from apscheduler.executors.pool import ProcessPoolExecutor

"""
Method 1:
"""
jobstores = {
    'mongo': {'type': 'mongodb'},
    'default': SQLAlchemyJobStore(url='sqlite:///jobs.sqlite')
}
executors = {
    'default': {'type': 'threadpool', 'max_workers': 20},
    'processpool': ProcessPoolExecutor(max_workers=5)
}
job_defaults = {
    'coalesce': False,
    'max_instances': 3
}

"""
Method 2 (ini format):
"""
gconfig = {
    'apscheduler.jobstores.mongo': {
        'type': 'mongodb'
    },
    'apscheduler.jobstores.default': {
        'type': 'sqlalchemy',
        'url': 'sqlite:///jobs.sqlite'
    },
    'apscheduler.executors.default': {
        'class': 'apscheduler.executors.pool:ThreadPoolExecutor',
        'max_workers': '20'
    },
    'apscheduler.executors.processpool': {
        'type': 'processpool',
        'max_workers': '5'
    },
    'apscheduler.job_defaults.coalesce': 'false',
    'apscheduler.job_defaults.max_instances': '3',
    'apscheduler.timezone': 'UTC',
}

sched_method1 = BlockingScheduler() # uses overrides from Method1
sched_method2 = BlockingScheduler() # uses same overrides from Method2 but in an ini format


@sched_method1.scheduled_job('interval', seconds=10)
def timed_job():
    print('This job is run every 10 seconds.')


@sched_method2.scheduled_job('cron', day_of_week='mon-fri', hour=10)
def scheduled_job():
    print('This job is run every weekday at 10am.')


sched_method1.configure(jobstores=jobstores, executors=executors, job_defaults=job_defaults, timezone=utc)
sched_method1.start()

sched_method2.configure(gconfig=gconfig)
sched_method2.start()

How to open a new HTML page using jQuery?

Use window.open("file2.html");

Syntax

var windowObjectReference = window.open(strUrl, strWindowName[, strWindowFeatures]);

Return value and parameters

windowObjectReference

A reference to the newly created window. If the call failed, it will be null. The reference can be used to access properties and methods of the new window provided it complies with Same origin policy security requirements.

strUrl

The URL to be loaded in the newly opened window. strUrl can be an HTML document on the web, image file or any resource supported by the browser.

strWindowName

A string name for the new window. The name can be used as the target of links and forms using the target attribute of an <a> or <form> element. The name should not contain any blank space. Note that strWindowName does not specify the title of the new window.

strWindowFeatures

Optional parameter listing the features (size, position, scrollbars, etc.) of the new window. The string must not contain any blank space, each feature name and value must be separated by a comma.

wp-admin shows blank page, how to fix it?

I also had a blank screen for my blog. The solution was to copy up a backup copy of wp-config,php somehow the 'live' wp-config.php had been replaced with a file size of zero.

In my case I had the same problem. Helped remove the wp-config.php file. Wordpress created new wp-config.php file and wp-admin is working flawlessly now. Rename plugins, themes folder does not help.

How to set background image in Java?

<script>
function SetBack(dir) {
    document.getElementById('body').style.backgroundImage=dir;
}
SetBack('url(myniftybg.gif)');
</script>

SQL Server equivalent to Oracle's CREATE OR REPLACE VIEW

For reference from SQL Server 2016 SP1+ you could use CREATE OR ALTER VIEW syntax.

MSDN CREATE VIEW:
CREATE [ OR ALTER ] VIEW [ schema_name . ] view_name [ (column [ ,...n ] ) ]   
[ WITH <view_attribute> [ ,...n ] ]   
AS select_statement   
[ WITH CHECK OPTION ]   
[ ; ]
OR ALTER

Conditionally alters the view only if it already exists.

db<>fiddle demo

Changing tab bar item image and text color iOS

Year: 2020 iOS 13.3

Copy below codes to AppDelegate.swift -> func didFinishLaunchingWithOptions

//Set Tab bar text/item fonts and size
let fontAttributes = [NSAttributedString.Key.font: UIFont(name: "YourFontName", size: 12.0)!]
UITabBarItem.appearance().setTitleTextAttributes(fontAttributes, for: .normal)
//Set Tab bar text/item color
UITabBar.appearance().tintColor = UIColor.init(named: "YourColorName")

Adding a collaborator to my free GitHub account?

Go to Manage Access page under settings (https://github.com/user/repo/settings/access) and add the collaborators as needed.

Screenshot:

How to read data from a zip file without having to unzip the entire file

Here is how a UTF8 text file can be read from a zip archive into a string variable (.NET Framework 4.5 and up):

string zipFileFullPath = "{{TypeYourZipFileFullPathHere}}";
string targetFileName = "{{TypeYourTargetFileNameHere}}";
string text = new string(
            (new System.IO.StreamReader(
             System.IO.Compression.ZipFile.OpenRead(zipFileFullPath)
             .Entries.Where(x => x.Name.Equals(targetFileName,
                                          StringComparison.InvariantCulture))
             .FirstOrDefault()
             .Open(), Encoding.UTF8)
             .ReadToEnd())
             .ToArray());

How do I make Visual Studio pause after executing a console application in debug mode?

Try to run the application with the Ctrl + F5 combination.

How to get list of dates between two dates in mysql select query

Try:

select * from 
(select adddate('1970-01-01',t4.i*10000 + t3.i*1000 + t2.i*100 + t1.i*10 + t0.i) selected_date from
 (select 0 i union select 1 union select 2 union select 3 union select 4 union select 5 union select 6 union select 7 union select 8 union select 9) t0,
 (select 0 i union select 1 union select 2 union select 3 union select 4 union select 5 union select 6 union select 7 union select 8 union select 9) t1,
 (select 0 i union select 1 union select 2 union select 3 union select 4 union select 5 union select 6 union select 7 union select 8 union select 9) t2,
 (select 0 i union select 1 union select 2 union select 3 union select 4 union select 5 union select 6 union select 7 union select 8 union select 9) t3,
 (select 0 i union select 1 union select 2 union select 3 union select 4 union select 5 union select 6 union select 7 union select 8 union select 9) t4) v
where selected_date between '2012-02-10' and '2012-02-15'

-for date ranges up to nearly 300 years in the future.

[Corrected following a suggested edit by UrvishAtSynapse.]

When does socket.recv(recv_size) return?

Yes, your conclusion is correct. socket.recv is a blocking call.

socket.recv(1024) will read at most 1024 bytes, blocking if no data is waiting to be read. If you don't read all data, an other call to socket.recv won't block.

socket.recv will also end with an empty string if the connection is closed or there is an error.

If you want a non-blocking socket, you can use the select module (a bit more complicated than just using sockets) or you can use socket.setblocking.

I had issues with socket.setblocking in the past, but feel free to try it if you want.

extract digits in a simple way from a python string

Without using regex, you can just do:

def get_num(x):
    return int(''.join(ele for ele in x if ele.isdigit()))

Result:

>>> get_num(x)
120
>>> get_num(y)
90
>>> get_num(banana)
200
>>> get_num(orange)
300

EDIT :

Answering the follow up question.

If we know that the only period in a given string is the decimal point, extracting a float is quite easy:

def get_num(x):
    return float(''.join(ele for ele in x if ele.isdigit() or ele == '.'))

Result:

>>> get_num('dfgd 45.678fjfjf')
45.678

How do I monitor all incoming http requests?

What you need to do is configure Fiddler to work as a "reverse proxy"

There are instructions on 2 different ways you can do this on Fiddler's website. Here is a copy of the steps:

Step #0

Before either of the following options will work, you must enable other computers to connect to Fiddler. To do so, click Tools > Fiddler Options > Connections and tick the "Allow remote computers to connect" checkbox. Then close Fiddler.

Option #1: Configure Fiddler as a Reverse-Proxy

Fiddler can be configured so that any traffic sent to http://127.0.0.1:8888 is automatically sent to a different port on the same machine. To set this configuration:

Start REGEDIT
Create a new DWORD named ReverseProxyForPort inside HKCU\SOFTWARE\Microsoft\Fiddler2.
Set the DWORD to the local port you'd like to re-route inbound traffic to (generally port 80 for a standard HTTP server)
Restart Fiddler
Navigate your browser to http://127.0.0.1:8888

Option #2: Write a FiddlerScript rule

Alternatively, you can write a rule that does the same thing.

Say you're running a website on port 80 of a machine named WEBSERVER. You're connecting to the website using Internet Explorer Mobile Edition on a Windows SmartPhone device for which you cannot configure the web proxy. You want to capture the traffic from the phone and the server's response.

Start Fiddler on the WEBSERVER machine, running on the default port of 8888.
Click Tools | Fiddler Options, and ensure the "Allow remote clients to connect" checkbox is checked. Restart if needed.
Choose Rules | Customize Rules.
Inside the OnBeforeRequest handler, add a new line of code:
if (oSession.host.toLowerCase() == "webserver:8888") oSession.host = "webserver:80";
On the SmartPhone, navigate to http://webserver:8888

Requests from the SmartPhone will appear in Fiddler. The requests are forwarded from port 8888 to port 80 where the webserver is running. The responses are sent back through Fiddler to the SmartPhone, which has no idea that the content originally came from port 80.

Error related to only_full_group_by when executing a query in MySql

If you don't want to make any changes in your current query then follow the below steps -

vagrant ssh into your box
Type: sudo vim /etc/mysql/my.cnf
Scroll to the bottom of file and type A to enter insert mode

Copy and paste

[mysqld]
sql_mode = STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION

Type esc to exit input mode
Type :wq to save and close vim.
Type sudo service mysql restart to restart MySQL.

Repeating a function every few seconds

There are lot of different Timers in the .NET BCL:

When to use which?

System.Timers.Timer, which fires an event and executes the code in one or more event sinks at regular intervals. The class is intended for use as a server-based or service component in a multithreaded environment; it has no user interface and is not visible at runtime.
System.Threading.Timer, which executes a single callback method on a thread pool thread at regular intervals. The callback method is defined when the timer is instantiated and cannot be changed. Like the System.Timers.Timer class, this class is intended for use as a server-based or service component in a multithreaded environment; it has no user interface and is not visible at runtime.
System.Windows.Forms.Timer (.NET Framework only), a Windows Forms component that fires an event and executes the code in one or more event sinks at regular intervals. The component has no user interface and is designed for use in a single-threaded environment; it executes on the UI thread.
System.Web.UI.Timer (.NET Framework only), an ASP.NET component that performs asynchronous or synchronous web page postbacks at a regular interval.
System.Windows.Threading.DispatcherTimer, a timer that's integrated into the Dispatcher queue. This timer is processed with a specified priority at a specified time interval.

Source

Some of them needs explicit Start call to begin ticking (for example System.Timers, System.Windows.Forms). And an explicit Stop to finish ticking.

using TimersTimer = System.Timers.Timer;

static void Main(string[] args)
{
    var timer = new TimersTimer(1000);
    timer.Elapsed += (s, e) => Console.WriteLine("Beep");
    Thread.Sleep(1000); //1 second delay
    timer.Start();
    Console.ReadLine();
    timer.Stop();

}

While on the other hand there are some Timers (like: System.Threading) where you don't need explicit Start and Stop calls. (The provided delegate will run a background thread.) Your timer will tick until you or the runtime dispose it.

So, the following two versions will work in the same way:

using ThreadingTimer = System.Threading.Timer;

static void Main(string[] args)
{
    var timer = new ThreadingTimer(_ => Console.WriteLine("Beep"), null, TimeSpan.FromSeconds(1), TimeSpan.FromSeconds(1));
    Console.ReadLine();
}

using ThreadingTimer = System.Threading.Timer;
static void Main(string[] args)
{
    StartTimer();
    Console.ReadLine();
}

static void StartTimer()
{
    var timer = new ThreadingTimer(_ => Console.WriteLine("Beep"), null, TimeSpan.FromSeconds(1), TimeSpan.FromSeconds(1));
}

But if your timer disposed then it will stop ticking obviously.

using ThreadingTimer = System.Threading.Timer; 

static void Main(string[] args)
{
    StartTimer();
    GC.Collect(0);
    Console.ReadLine();
}

static void StartTimer()
{
    var timer = new ThreadingTimer(_ => Console.WriteLine("Beep"), null, TimeSpan.FromSeconds(1), TimeSpan.FromSeconds(1));
}

How to add the JDBC mysql driver to an Eclipse project?

You can paste the .jar file of the driver in the Java setup instead of adding it to each project that you create. Paste it in C:\Program Files\Java\jre7\lib\ext or wherever you have installed java.

After this you will find that the .jar driver is enlisted in the library folder of your created project(JRE system library) in the IDE. No need to add it repetitively.

Android : How to set onClick event for Button in List item of ListView

Try This,

public View getView(final int position, View convertView,ViewGroup parent) 
{
   if(convertView == null)
   {
        LayoutInflater inflater = getLayoutInflater();
        convertView  = (LinearLayout)inflater.inflate(R.layout.YOUR_LAYOUT, null);
   }

   Button Button1= (Button)  convertView  .findViewById(R.id.BUTTON1_ID);

   Button1.setOnClickListener(new OnClickListener() 
   { 
       @Override
       public void onClick(View v) 
       {
           // Your code that you want to execute on this button click
       }

   });


   return convertView ;
}

It may help you....

Formula px to dp, dp to px android

// for getting in terms of Decimal/Float

public static float convertPixelsToDp(float px, Context context) {

    Resources resources = context.getResources();
    DisplayMetrics metrics = resources.getDisplayMetrics();
    float dp = px / (metrics.densityDpi / 160f);
    return Math.round(dp);
}



public static float convertDpToPixel(float dp, Context context) {
    DisplayMetrics metrics = Resources.getSystem().getDisplayMetrics();
    float px = dp * (metrics.densityDpi / 160f);
    return Math.round(px);
}


// for  getting in terms of Integer

private int convertPxToDp(int px, Context context) {
    Resources resources = context.getResources();
    return Math.round(px / (resources.getDisplayMetrics().xdpi / DisplayMetrics.DENSITY_DEFAULT));
}


private int convertDpToPx(int dp, Context context) {
    Resources resources = context.getResources();

    return Math.round(dp * (resources.getDisplayMetrics().xdpi / DisplayMetrics.DENSITY_DEFAULT));

}

________________________________________________________________________________

public static float convertPixelsToDp(float px){
    DisplayMetrics metrics = Resources.getSystem().getDisplayMetrics();
    float dp = px / (metrics.densityDpi / 160f);
    return Math.round(dp);
}

public static float convertDpToPixel(float dp){
    DisplayMetrics metrics = Resources.getSystem().getDisplayMetrics();
    float px = dp * (metrics.densityDpi / 160f);
    return Math.round(px);
}


private int convertDpToPx(int dp){
    return Math.round(dp*(getResources().getDisplayMetrics().xdpi/DisplayMetrics.DENSITY_DEFAULT));

}

private int convertPxToDp(int px){
    return Math.round(px/(Resources.getSystem().getDisplayMetrics().xdpi/DisplayMetrics.DENSITY_DEFAULT));
}

How to make a great R reproducible example

(Here's my advice from How to write a reproducible example. I've tried to make it short but sweet).

How to write a reproducible example

You are most likely to get good help with your R problem if you provide a reproducible example. A reproducible example allows someone else to recreate your problem by just copying and pasting R code.

You need to include four things to make your example reproducible: required packages, data, code, and a description of your R environment.

Packages should be loaded at the top of the script, so it's easy to see which ones the example needs.
The easiest way to include data in an email or Stack Overflow question is to use dput() to generate the R code to recreate it. For example, to recreate the mtcars dataset in R, I'd perform the following steps:
1. Run dput(mtcars) in R
2. Copy the output
3. In my reproducible script, type mtcars <- then paste.
Spend a little bit of time ensuring that your code is easy for others to read:
- Make sure you've used spaces and your variable names are concise, but informative
- Use comments to indicate where your problem lies
- Do your best to remove everything that is not related to the problem.
  The shorter your code is, the easier it is to understand.
Include the output of sessionInfo() in a comment in your code. This summarises your R environment and makes it easy to check if you're using an out-of-date package.

You can check you have actually made a reproducible example by starting up a fresh R session and pasting your script in.

Before putting all of your code in an email, consider putting it on Gist github. It will give your code nice syntax highlighting, and you don't have to worry about anything getting mangled by the email system.

Bootstrap 3 with remote Modal

Here is the method I use. It does not require any hidden DOM elements on the page, and only requires an anchor tag with the href of the modal partial, and a class of 'modalTrigger'. When the modal is closed (hidden) it is removed from the DOM.

  (function(){
        // Create jQuery body object
        var $body = $('body'),

        // Use a tags with 'class="modalTrigger"' as the triggers
        $modalTriggers = $('a.modalTrigger'),

        // Trigger event handler
        openModal = function(evt) {
              var $trigger = $(this),                  // Trigger jQuery object

              modalPath = $trigger.attr('href'),       // Modal path is href of trigger

              $newModal,                               // Declare modal variable

              removeModal = function(evt) {            // Remove modal handler
                    $newModal.off('hidden.bs.modal');  // Turn off 'hide' event
                    $newModal.remove();                // Remove modal from DOM
              },

              showModal = function(data) {             // Ajax complete event handler
                    $body.append(data);                // Add to DOM
                    $newModal = $('.modal').last();    // Modal jQuery object
                    $newModal.modal('show');           // Showtime!
                    $newModal.on('hidden.bs.modal',removeModal); // Remove modal from DOM on hide
              };

              $.get(modalPath,showModal);             // Ajax request

              evt.preventDefault();                   // Prevent default a tag behavior
        };

        $modalTriggers.on('click',openModal);         // Add event handlers
  }());

To use, just create an a tag with the href of the modal partial:

<a href="path/to/modal-partial.html" class="modalTrigger">Open Modal</a>

How to convert Moment.js date to users local timezone?

Here's what I did:

var timestamp = moment.unix({{ time }});
var utcOffset = moment().utcOffset();
var local_time = timestamp.add(utcOffset, "minutes");
var dateString = local_time.fromNow();

Where {{ time }} is the utc timestamp.

How to store a datetime in MySQL with timezone info

I once also faced such an issue where i needed to save data which was used by different collaborators and i ended up storing the time in unix timestamp form which represents the number of seconds since january 1970 which is an integer format. Example todays date and time in tanzania is Friday, September 13, 2019 9:44:01 PM which when store in unix timestamp would be 1568400241

Now when reading the data simply use something like php or any other language and extract the date from the unix timestamp. An example with php will be

echo date('m/d/Y', 1568400241);

This makes it easier even to store data with other collaborators in different locations. They can simply convert the date to unix timestamp with their own gmt offset and store it in a integer format and when outputting this simply convert with a

Distinct in Linq based on only one field of the table

Daniel Hilgarth's answer above leads to a System.NotSupported exception With Entity-Framework. With Entity-Framework, it has to be:

table1.GroupBy(x => x.Text).Select(x => x.FirstOrDefault());

Returning a C string from a function

char* myFunction()
{
    return "My String";
}

In C, string literals are arrays with the static constant memory class, so returning a pointer to this array is safe. More details are in Stack Overflow question "Life-time" of a string literal in C

"The page has expired due to inactivity" - Laravel 5.5

I ran into the same issue in Laravel 5.5. In my case, it happened after changing a route from GET to POST. The issue was because I forgot to pass a CSRF token when I switched to POST.

You can either post a CSRF token in your form by calling:

 {{ csrf_field() }}

Or exclude your route in app/Http/Middleware/VerifyCsrfToken.php

 protected $except = [
        'your/route'
    ];

How to change default timezone for Active Record in Rails?

for Chinese user, just add two lines below to you config/application.rb :

config.active_record.default_timezone = :local
config.time_zone = 'Beijing'

Most efficient way to find smallest of 3 numbers Java?

Simply use this math function

System.out.println(Math.min(a,b,c));

You will get the answer in single line.

How do I display ? Play (Forward) or Solid right arrow symbol in html?

ImportError: No module named pip

After installing ez_setup, you should have easy_install available. To install pip just do:

easy_install pip

Print array to a file

Quick and simple do this:

file_put_contents($filename, var_export($myArray, true));

How to use shared memory with Linux in C

Here's a mmap example:

#include <sys/mman.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>

/*
 * pvtmMmapAlloc - creates a memory mapped file area.  
 * The return value is a page-aligned memory value, or NULL if there is a failure.
 * Here's the list of arguments:
 * @mmapFileName - the name of the memory mapped file
 * @size - the size of the memory mapped file (should be a multiple of the system page for best performance)
 * @create - determines whether or not the area should be created.
 */
void* pvtmMmapAlloc (char * mmapFileName, size_t size, char create)  
{      
  void * retv = NULL;                                                                                              
  if (create)                                                                                         
  {                                                                                                   
    mode_t origMask = umask(0);                                                                       
    int mmapFd = open(mmapFileName, O_CREAT|O_RDWR, 00666);                                           
    umask(origMask);                                                                                  
    if (mmapFd < 0)                                                                                   
    {                                                                                                 
      perror("open mmapFd failed");                                                                   
      return NULL;                                                                                    
    }                                                                                                 
    if ((ftruncate(mmapFd, size) == 0))               
    {                                                                                                 
      int result = lseek(mmapFd, size - 1, SEEK_SET);               
      if (result == -1)                                                                               
      {                                                                                               
        perror("lseek mmapFd failed");                                                                
        close(mmapFd);                                                                                
        return NULL;                                                                                  
      }                                                                                               

      /* Something needs to be written at the end of the file to                                      
       * have the file actually have the new size.                                                    
       * Just writing an empty string at the current file position will do.                           
       * Note:                                                                                        
       *  - The current position in the file is at the end of the stretched                           
       *    file due to the call to lseek().  
              *  - The current position in the file is at the end of the stretched                    
       *    file due to the call to lseek().                                                          
       *  - An empty string is actually a single '\0' character, so a zero-byte                       
       *    will be written at the last byte of the file.                                             
       */                                                                                             
      result = write(mmapFd, "", 1);                                                                  
      if (result != 1)                                                                                
      {                                                                                               
        perror("write mmapFd failed");                                                                
        close(mmapFd);                                                                                
        return NULL;                                                                                  
      }                                                                                               
      retv  =  mmap(NULL, size,   
                  PROT_READ | PROT_WRITE, MAP_SHARED, mmapFd, 0);                                     

      if (retv == MAP_FAILED || retv == NULL)                                                         
      {                                                                                               
        perror("mmap");                                                                               
        close(mmapFd);                                                                                
        return NULL;                                                                                  
      }                                                                                               
    }                                                                                                 
  }                                                                                                   
  else                                                                                                
  {                                                                                                   
    int mmapFd = open(mmapFileName, O_RDWR, 00666);                                                   
    if (mmapFd < 0)                                                                                   
    {                                                                                                 
      return NULL;                                                                                    
    }                                                                                                 
    int result = lseek(mmapFd, 0, SEEK_END);                                                          
    if (result == -1)                                                                                 
    {                                                                                                 
      perror("lseek mmapFd failed");                  
      close(mmapFd);                                                                                  
      return NULL;                                                                                    
    }                                                                                                 
    if (result == 0)                                                                                  
    {                                                                                                 
      perror("The file has 0 bytes");                           
      close(mmapFd);                                                                                  
      return NULL;                                                                                    
    }                                                                                              
    retv  =  mmap(NULL, size,     
                PROT_READ | PROT_WRITE, MAP_SHARED, mmapFd, 0);                                       

    if (retv == MAP_FAILED || retv == NULL)                                                           
    {                                                                                                 
      perror("mmap");                                                                                 
      close(mmapFd);                                                                                  
      return NULL;                                                                                    
    }                                                                                                 

    close(mmapFd);                                                                                    

  }                                                                                                   
  return retv;                                                                                        
}

Could not load file or assembly 'System.Net.Http.Formatting' or one of its dependencies. The system cannot find the path specified

As originally suggested in a comment by GeoMac and documented on NuGet's docs the following worked for me when none of the other answers worked:

Tools / NuGet Package Manager / Package Manager Console

Update-Package -ProjectName MyProjectName -reinstall

SQL Statement using Where clause with multiple values

SELECT PersonName, songName, status
FROM table
WHERE name IN ('Holly', 'Ryan')

If you are using parametrized Stored procedure:

Pass in comma separated string
Use special function to split comma separated string into table value variable
Use INNER JOIN ON t.PersonName = newTable.PersonName using a table variable which contains passed in names

SQL Server date format yyyymmdd

In SQL Server, you can do:

select coalesce(format(try_convert(date, col, 112), 'yyyyMMdd'), col)

This attempts the conversion, keeping the previous value if available.

Note: I hope you learned a lesson about storing dates as dates and not strings.

How to get the path of the batch script in Windows?

%cd% will give you the path of the directory from where the script is running.

Just run:

echo %cd%

Multiple queries executed in java in single statement

I was wondering if it is possible to execute something like this using JDBC.

"SELECT FROM * TABLE;INSERT INTO TABLE;"

Yes it is possible. There are two ways, as far as I know. They are

By setting database connection property to allow multiple queries, separated by a semi-colon by default.
By calling a stored procedure that returns cursors implicit.

Following examples demonstrate the above two possibilities.

Example 1: ( To allow multiple queries ):

While sending a connection request, you need to append a connection property allowMultiQueries=true to the database url. This is additional connection property to those if already exists some, like autoReConnect=true, etc.. Acceptable values for allowMultiQueries property are true, false, yes, and no. Any other value is rejected at runtime with an SQLException.

String dbUrl = "jdbc:mysql:///test?allowMultiQueries=true";

Unless such instruction is passed, an SQLException is thrown.

You have to use execute( String sql ) or its other variants to fetch results of the query execution.

boolean hasMoreResultSets = stmt.execute( multiQuerySqlString );

To iterate through and process results you require following steps:

READING_QUERY_RESULTS: // label  
    while ( hasMoreResultSets || stmt.getUpdateCount() != -1 ) {  
        if ( hasMoreResultSets ) {  
            Resultset rs = stmt.getResultSet();
            // handle your rs here
        } // if has rs
        else { // if ddl/dml/...
            int queryResult = stmt.getUpdateCount();  
            if ( queryResult == -1 ) { // no more queries processed  
                break READING_QUERY_RESULTS;  
            } // no more queries processed  
            // handle success, failure, generated keys, etc here
        } // if ddl/dml/...

        // check to continue in the loop  
        hasMoreResultSets = stmt.getMoreResults();  
    } // while results

Example 2: Steps to follow:

Create a procedure with one or more select, and DML queries.
Call it from java using CallableStatement.
You can capture multiple ResultSets executed in procedure.
DML results can't be captured but can issue another select
to find how the rows are affected in the table.

Sample table and procedure:

mysql> create table tbl_mq( i int not null auto_increment, name varchar(10), primary key (i) );
Query OK, 0 rows affected (0.16 sec)

mysql> delimiter //
mysql> create procedure multi_query()
    -> begin
    ->  select count(*) as name_count from tbl_mq;
    ->  insert into tbl_mq( names ) values ( 'ravi' );
    ->  select last_insert_id();
    ->  select * from tbl_mq;
    -> end;
    -> //
Query OK, 0 rows affected (0.02 sec)
mysql> delimiter ;
mysql> call multi_query();
+------------+
| name_count |
+------------+
|          0 |
+------------+
1 row in set (0.00 sec)

+------------------+
| last_insert_id() |
+------------------+
|                3 |
+------------------+
1 row in set (0.00 sec)

+---+------+
| i | name |
+---+------+
| 1 | ravi |
+---+------+
1 row in set (0.00 sec)

Query OK, 0 rows affected (0.00 sec)

Call Procedure from Java:

CallableStatement cstmt = con.prepareCall( "call multi_query()" );  
boolean hasMoreResultSets = cstmt.execute();  
READING_QUERY_RESULTS:  
    while ( hasMoreResultSets ) {  
        Resultset rs = stmt.getResultSet();
        // handle your rs here
    } // while has more rs

What are the alternatives now that the Google web search API has been deprecated?

Gigablast offers a cheap web search API: http://www.gigablast.com/searchfeed.html

MVC Redirect to View from jQuery with parameters

If your click handler is successfully called then this should work:

$('#results').on('click', '.item', function () {
            var NestId = $(this).data('id');
            var url = "/Artists/Details?NestId=" + NestId; 
            window.location.href = url; 
        })

EDIT: In this particular case given that the action method parameter is a string which is nullable, then if NestId == null, won't cause any exception at all, given that the ModelBinder won't complain about it.

Pass props to parent component in React.js

This is an example without using the onClick event. I simply pass a callback function to the child by props. With that callback the child call also send data back. I was inspired by the examples in the docs.

Small example (this is in a tsx files, so props and states must be declared fully, I deleted some logic out of the components, so it is less code).

*Update: Important is to bind this to the callback, otherwise the callback has the scope of the child and not the parent. Only problem: it is the "old" parent...

SymptomChoser is the parent:

interface SymptomChooserState {
  // true when a symptom was pressed can now add more detail
  isInDetailMode: boolean
  // since when user has this symptoms
  sinceDate: Date,
}

class SymptomChooser extends Component<{}, SymptomChooserState> {

  state = {
    isInDetailMode: false,
    sinceDate: new Date()
  }

  helloParent(symptom: Symptom) {
    console.log("This is parent of: ", symptom.props.name);
    // TODO enable detail mode
  }

  render() {
    return (
      <View>
        <Symptom name='Fieber' callback={this.helloParent.bind(this)} />
      </View>
    );
  }
}

Symptom is the child (in the props of the child I declared the callback function, in the function selectedSymptom the callback is called):

interface SymptomProps {
  // name of the symptom
  name: string,
  // callback to notify SymptomChooser about selected Symptom.
  callback: (symptom: Symptom) => void
}

class Symptom extends Component<SymptomProps, SymptomState>{

  state = {
    isSelected: false,
    severity: 0
  }

  selectedSymptom() {
    this.setState({ isSelected: true });
    this.props.callback(this);
  }

  render() {
    return (
      // symptom is not selected
      <Button
        style={[AppStyle.button]}
        onPress={this.selectedSymptom.bind(this)}>
        <Text style={[AppStyle.textButton]}>{this.props.name}</Text>
      </Button>
    );
  }
}

Returning a file to View/Download in ASP.NET MVC

FileVirtualPath --> Research\Global Office Review.pdf

public virtual ActionResult GetFile()
{
    return File(FileVirtualPath, "application/force-download", Path.GetFileName(FileVirtualPath));
}

Reading and writing binary file

It can be done with simple commands in the following snippet.

Copies the whole file of any size. No size constraint!

Just use this. Tested And Working!!

#include<iostream>
#include<fstream>
using namespace std;
int main()
{
  ifstream infile;
  infile.open("source.pdf",ios::binary|ios::in);

  ofstream outfile;
  outfile.open("temppdf.pdf",ios::binary|ios::out);

  int buffer[2];
  while(infile.read((char *)&buffer,sizeof(buffer)))
  {
      outfile.write((char *)&buffer,sizeof(buffer));
  }

  infile.close();
  outfile.close();
  return 0;
}

Having a smaller buffer size would be helpful in copying tiny files. Even "char buffer[2]" would do the job.

How do I check if the user is pressing a key?

You have to implement KeyListener,take a look here: http://docs.oracle.com/javase/7/docs/api/java/awt/event/KeyListener.html

More details on how to use it: http://docs.oracle.com/javase/tutorial/uiswing/events/keylistener.html

How to handle ETIMEDOUT error?

In case if you are using node js, then this could be the possible solution

const express = require("express");
const app = express();
const server = app.listen(8080);
server.keepAliveTimeout = 61 * 1000;

https://medium.com/hk01-tech/running-eks-in-production-for-2-years-the-kubernetes-journey-at-hk01-68130e603d76

Could not load file or assembly for Oracle.DataAccess in .NET

I was facing the same issue for a couple of days then I figure out that the Oracle.DataAccess is available in the references list of the project, but in the bin folder is missing. So I removed it from the references list and readded again.

Node.js Error: connect ECONNREFUSED

Check with starting mysql in terminal. Use below command

mysql-ctl start

In my case its worked

Pretty print in MongoDB shell as default

Oh so i guess .pretty() is equal to:

db.collection.find().forEach(printjson);

What is property in hasOwnProperty in JavaScript?

Finding the path of the program that will execute from the command line in Windows

As the thread mentioned in the comment, get-command in powershell can also work it out. For example, you can type get-command npm and the output is as below:

Getting the source HTML of the current page from chrome extension

Inject a script into the page you want to get the source from and message it back to the popup....

manifest.json

{
  "name": "Get pages source",
  "version": "1.0",
  "manifest_version": 2,
  "description": "Get pages source from a popup",
  "browser_action": {
    "default_icon": "icon.png",
    "default_popup": "popup.html"
  },
  "permissions": ["tabs", "<all_urls>"]
}

popup.html

<!DOCTYPE html>
<html style=''>
<head>
<script src='popup.js'></script>
</head>
<body style="width:400px;">
<div id='message'>Injecting Script....</div>
</body>
</html>

popup.js

chrome.runtime.onMessage.addListener(function(request, sender) {
  if (request.action == "getSource") {
    message.innerText = request.source;
  }
});

function onWindowLoad() {

  var message = document.querySelector('#message');

  chrome.tabs.executeScript(null, {
    file: "getPagesSource.js"
  }, function() {
    // If you try and inject into an extensions page or the webstore/NTP you'll get an error
    if (chrome.runtime.lastError) {
      message.innerText = 'There was an error injecting script : \n' + chrome.runtime.lastError.message;
    }
  });

}

window.onload = onWindowLoad;

getPagesSource.js

// @author Rob W <http://stackoverflow.com/users/938089/rob-w>
// Demo: var serialized_html = DOMtoString(document);

function DOMtoString(document_root) {
    var html = '',
        node = document_root.firstChild;
    while (node) {
        switch (node.nodeType) {
        case Node.ELEMENT_NODE:
            html += node.outerHTML;
            break;
        case Node.TEXT_NODE:
            html += node.nodeValue;
            break;
        case Node.CDATA_SECTION_NODE:
            html += '<![CDATA[' + node.nodeValue + ']]>';
            break;
        case Node.COMMENT_NODE:
            html += '<!--' + node.nodeValue + '-->';
            break;
        case Node.DOCUMENT_TYPE_NODE:
            // (X)HTML documents are identified by public identifiers
            html += "<!DOCTYPE " + node.name + (node.publicId ? ' PUBLIC "' + node.publicId + '"' : '') + (!node.publicId && node.systemId ? ' SYSTEM' : '') + (node.systemId ? ' "' + node.systemId + '"' : '') + '>\n';
            break;
        }
        node = node.nextSibling;
    }
    return html;
}

chrome.runtime.sendMessage({
    action: "getSource",
    source: DOMtoString(document)
});

Can CSS detect the number of children an element has?

yes we can do this using nth-child like so

div:nth-child(n + 8) {
    background: red;
}

This will make the 8th div child onwards become red. Hope this helps...

Also, if someone ever says "hey, they can't be done with styled using css, use JS!!!" doubt them immediately. CSS is extremely flexible nowadays

Example :: http://jsfiddle.net/uWrLE/1/

In the example the first 7 children are blue, then 8 onwards are red...

How to get user's high resolution profile picture on Twitter?

for me the "workaround" solution was to remove the "_normal" from the end of the string

Check it out below:

Low res image: https://pbs.twimg.com/profile_images/636894769742897152/frlgaWB8_normal.jpg
Hi res image: https://pbs.twimg.com/profile_images/636894769742897152/frlgaWB8.jpg

Simulate limited bandwidth from within Chrome?

If you are running Linux, the following command is really useful for this:

trickle -s -d 50 -w 100 firefox

The -s tells the command to run standalone, the -d 50 tells it to limit bandwidth to 50 KB/s, the -w 100 set the peak detection window size to 100 KB. firefox tells the command to start firefox with all of this rate limiting applied to any sites it attempts to load.

Update

Chrome 38 is out now and includes throttling. To find it, bring up the Developer Tools: Ctrl+Shift+I does it on my machine, otherwise Menu->More Tools->Developer Tools will bring you there.

Then Toggle Device Mode by clicking the phone in the upper left of the Developer Tools Panel (see the tooltip below).

Toggle device mode

Then activate throttling like so.

Activate Chrome throttling

If you find this a bit clunky, my suggestion above works for both Chrome and Firefox.

Convert php array to Javascript

If you need a multidimensional PHP array to be printed directly into the html page source code, and in an indented human-readable Javascript Object Notation (aka JSON) fashion, use this nice function I found in http://php.net/manual/en/function.json-encode.php#102091 coded by somebody nicknamed "bohwaz".

<?php

function json_readable_encode($in, $indent = 0, $from_array = false)
{
    $_myself = __FUNCTION__;
    $_escape = function ($str)
    {
        return preg_replace("!([\b\t\n\r\f\"\\'])!", "\\\\\\1", $str);
    };

    $out = '';

    foreach ($in as $key=>$value)
    {
        $out .= str_repeat("\t", $indent + 1);
        $out .= "\"".$_escape((string)$key)."\": ";

        if (is_object($value) || is_array($value))
        {
            $out .= "\n";
            $out .= $_myself($value, $indent + 1);
        }
        elseif (is_bool($value))
        {
            $out .= $value ? 'true' : 'false';
        }
        elseif (is_null($value))
        {
            $out .= 'null';
        }
        elseif (is_string($value))
        {
            $out .= "\"" . $_escape($value) ."\"";
        }
        else
        {
            $out .= $value;
        }

        $out .= ",\n";
    }

    if (!empty($out))
    {
        $out = substr($out, 0, -2);
    }

    $out = str_repeat("\t", $indent) . "{\n" . $out;
    $out .= "\n" . str_repeat("\t", $indent) . "}";

    return $out;
}

?>

ActiveXObject in Firefox or Chrome (not IE!)

ActiveX is only supported by IE - the other browsers use a plugin architecture called NPAPI. However, there's a cross-browser plugin framework called Firebreath that you might find useful.

Javascript to Select Multiple options

Based on @Peter Baley answer, I created a more generic function:

   @objectId: HTML object ID
   @values: can be a string or an array. String is less "secure" (should not contain repeated value).
   function checkMultiValues(objectId, values){
        selectMultiObject=document.getElementById(objectId);
        for ( var i = 0, l = selectMultiObject.options.length, o; i < l; i++ )
        {
          o = selectMultiObject.options[i];
          if ( values.indexOf( o.value ) != -1 )
          {
            o.selected = true;
          } else {
            o.selected = false;
          }
        }
    }

Example: checkMultiValues('thisMultiHTMLObject','a,b,c,d');

How do you kill all current connections to a SQL Server 2005 database?

These didn't work for me (SQL2008 Enterprise), I also couldn't see any running processes or users connected to the DB. Restarting the server (Right click on Sql Server in Management Studio and pick Restart) allowed me to restore the DB.

How to check if bootstrap modal is open, so I can use jquery validate?

You can also directly use jQuery.

$('#myModal').is(':visible');

Javascript : calling function from another file

Why don't you take a look to this answer

Including javascript files inside javascript files

In short you can load the script file with AJAX or put a script tag on the HTML to include it( before the script that uses the functions of the other script). The link I posted is a great answer and has multiple examples and explanations of both methods.

Using G++ to compile multiple .cpp and .h files

If you want to use #include <myheader.hpp> inside your cpp files you can use:

g++ *.cpp -I. -o out

convert string array to string

Try:

String.Join("", test);

which should return a string joining the two elements together. "" indicates that you want the strings joined together without any separators.

Sequelize OR condition object

Seems there is another format now

where: {
    LastName: "Doe",
    $or: [
        {
            FirstName: 
            {
                $eq: "John"
            }
        }, 
        {
            FirstName: 
            {
                $eq: "Jane"
            }
        }, 
        {
            Age: 
            {
                $gt: 18
            }
        }
    ]
}

Will generate

WHERE LastName='Doe' AND (FirstName = 'John' OR FirstName = 'Jane' OR Age > 18)

See the doc: http://docs.sequelizejs.com/en/latest/docs/querying/#where

Import pfx file into particular certificate store from command line

Here is the complete code, import pfx, add iis website, add ssl binding:

$SiteName = "MySite"
$HostName = "localhost"
$CertificatePassword = '1234'
$SiteFolder = Join-Path -Path 'C:\inetpub\wwwroot' -ChildPath $SiteName
$certPath = 'c:\cert.pfx'


Write-Host 'Import pfx certificate' $certPath
$certRootStore = “LocalMachine”
$certStore = "My"
$pfx = New-Object System.Security.Cryptography.X509Certificates.X509Certificate2
$pfx.Import($certPath,$CertificatePassword,"Exportable,PersistKeySet") 
$store = New-Object System.Security.Cryptography.X509Certificates.X509Store($certStore,$certRootStore) 
$store.Open('ReadWrite')
$store.Add($pfx) 
$store.Close() 
$certThumbprint = $pfx.Thumbprint


Write-Host 'Add website' $SiteName
New-WebSite -Name $SiteName -PhysicalPath $SiteFolder -Force
$IISSite = "IIS:\Sites\$SiteName"
Set-ItemProperty $IISSite -name  Bindings -value @{protocol="https";bindingInformation="*:443:$HostName"}
if($applicationPool) { Set-ItemProperty $IISSite -name  ApplicationPool -value $IISApplicationPool }


Write-Host 'Bind certificate with Thumbprint' $certThumbprint
$obj = get-webconfiguration "//sites/site[@name='$SiteName']"
$binding = $obj.bindings.Collection[0]
$method = $binding.Methods["AddSslCertificate"]
$methodInstance = $method.CreateInstance()
$methodInstance.Input.SetAttributeValue("certificateHash", $certThumbprint)
$methodInstance.Input.SetAttributeValue("certificateStoreName", $certStore)
$methodInstance.Execute()

oracle diff: how to compare two tables?

In addition to some of the other answers provided, if you wanted to look at the differences in table structure with a table that might have the similar but differing structure, you could do this in multiple ways:

First - If using Oracle SQL Developer, you could run a describe on both tables to compare them:

descr TABLE_NAME1
descr TABLE_NAME2

Second - The first solution may not be ideal for larger tables with a lot of columns. If you only want to see the differences in the data between the two tables, then as mentioned by several others, using the SQL Minus operator should do the job.

Third - If you are using Oracle SQL Developer, and you want to compare the table structure of two tables using different schemas you can do the following:

Select "Tools"
Select "Database Diff"
Select "Source Connection"
Select "Destination Connection"
Select the "Standard Object Types" you want to compare
Enter the "Table Name"
Click "Next" until you reach "Finish"
Click "Finish"
NOTE: In steps 3 & 4 is where you would select the differing schemas in which the objects exist that you want to compare.

Fourth - If the tables two tables you wish to compare have more columns, are in the same schema, have no need to compare more than two tables and are unappealing to compare visually using the DESCR command you can use the following to compare the differences in the table structure:

select 
     a.column_name    || ' | ' || b.column_name, 
     a.data_type      || ' | ' || b.data_type, 
     a.data_length    || ' | ' || b.data_length, 
     a.data_scale     || ' | ' || b.data_scale, 
     a.data_precision || ' | ' || b.data_precision
from 
     user_tab_columns a,
     user_tab_columns b
where 
     a.table_name = 'TABLE_NAME1' 
and  b.table_name = 'TABLE_NAME2'
and  ( 
       a.data_type      <> b.data_type     or 
       a.data_length    <> b.data_length   or 
       a.data_scale     <> b.data_scale    or 
       a.data_precision <> b.data_precision
     )
and a.column_name = b.column_name;

What does "if (rs.next())" mean?

I'm presuming you're using Java 6 and that the ResultSet that you're using is a java.sql.ResultSet.

The JavaDoc for the ResultSet.next() method states:

Moves the cursor froward one row from its current position. A ResultSet cursor is initially positioned before the first row; the first call to the method next makes the first row the current row; the second call makes the second row the current row, and so on.

When a call to the next method returns false, the cursor is positioned after the last row. Any invocation of a ResultSet method which requires a current row will result in a SQLException being thrown.

So, if(rs.next(){ //do something } means "If the result set still has results, move to the next result and do something".

As BalusC pointed out, you need to replace

ResultSet rs = stmt.executeQuery(sql);

with

ResultSet rs = stmt.executeQuery();

Because you've already set the SQL to use in the statement with your previous line

PreparedStatement stmt = conn.prepareStatement(sql);

If you weren't using the PreparedStatement, then ResultSet rs = stmt.executeQuery(sql); would work.

Draw horizontal rule in React Native

import {Dimensions} from 'react-native'

const { width, height } = Dimensions.get('window')

<View
  style={{
         borderBottomColor: '#1D3E5E',
         borderBottomWidth: 1,
         width : width , 
  }}
/>

byte array to pdf

Usually this happens if something is wrong with the byte array.

File.WriteAllBytes("filename.PDF", Byte[]);

This creates a new file, writes the specified byte array to the file, and then closes the file. If the target file already exists, it is overwritten.

Asynchronous implementation of this is also available.

public static System.Threading.Tasks.Task WriteAllBytesAsync 
(string path, byte[] bytes, System.Threading.CancellationToken cancellationToken = null);

Using ConfigurationManager to load config from an arbitrary location

I provided the configuration values to word hosted .nET Compoent as follows.

A .NET Class Library component being called/hosted in MS Word. To provide configuration values to my component, I created winword.exe.config in C:\Program Files\Microsoft Office\OFFICE11 folder. You should be able to read configurations values like You do in Traditional .NET.

string sMsg = System.Configuration.ConfigurationManager.AppSettings["WSURL"];

How to create a GUID in Excel?

The formula for Dutch Excel:

=KLEINE.LETTERS(
    TEKST.SAMENVOEGEN(
        DEC.N.HEX(ASELECTTUSSEN(0;MACHT(16;8));8);"-";
        DEC.N.HEX(ASELECTTUSSEN(0;MACHT(16;4));4);"-";"4";
        DEC.N.HEX(ASELECTTUSSEN(0;MACHT(16;3));3);"-";
        DEC.N.HEX(ASELECTTUSSEN(8;11));
        DEC.N.HEX(ASELECTTUSSEN(0;MACHT(16;3));3);"-";
        DEC.N.HEX(ASELECTTUSSEN(0;MACHT(16;8));8);
        DEC.N.HEX(ASELECTTUSSEN(0;MACHT(16;4));4)
    )
)

Is there an alternative sleep function in C to milliseconds?

You can use this cross-platform function:

#ifdef WIN32
#include <windows.h>
#elif _POSIX_C_SOURCE >= 199309L
#include <time.h>   // for nanosleep
#else
#include <unistd.h> // for usleep
#endif

void sleep_ms(int milliseconds){ // cross-platform sleep function
#ifdef WIN32
    Sleep(milliseconds);
#elif _POSIX_C_SOURCE >= 199309L
    struct timespec ts;
    ts.tv_sec = milliseconds / 1000;
    ts.tv_nsec = (milliseconds % 1000) * 1000000;
    nanosleep(&ts, NULL);
#else
    if (milliseconds >= 1000)
      sleep(milliseconds / 1000);
    usleep((milliseconds % 1000) * 1000);
#endif
}

Placeholder in IE9

I searched on the internet and found a simple jquery code to handle this problem. In my side, it was solved and worked on ie 9.

$("input[placeholder]").each(function () {
        var $this = $(this);
        if($this.val() == ""){
            $this.val($this.attr("placeholder")).focus(function(){
                if($this.val() == $this.attr("placeholder")) {
                    $this.val("");
                }
            }).blur(function(){
                if($this.val() == "") {
                    $this.val($this.attr("placeholder"));
                }
            });
        }
    });

How to implement debounce in Vue2?

Option 1: Re-usable, no deps

- Recommended if needed more than once in your project

/helpers.js

export function debounce (fn, delay) {
  var timeoutID = null
  return function () {
    clearTimeout(timeoutID)
    var args = arguments
    var that = this
    timeoutID = setTimeout(function () {
      fn.apply(that, args)
    }, delay)
  }
}

/Component.vue

<script>
  import {debounce} from './helpers'

  export default {
    data () {
      return {
        input: '',
        debouncedInput: ''
      }
    },
    watch: {
      input: debounce(function (newVal) {
        this.debouncedInput = newVal
      }, 500)
    }
  }
</script>

Codepen

Option 2: In-component, also no deps

- Recommended if using once or in small project

/Component.vue

<template>
    <input type="text" v-model="input" />
</template>

<script>
  export default {
    data: {
        timeout: null,
        debouncedInput: ''
    },
    computed: {
     input: {
        get() {
          return this.debouncedInput
        },
        set(val) {
          if (this.timeout) clearTimeout(this.timeout)
          this.timeout = setTimeout(() => {
            this.debouncedInput = val
          }, 300)
        }
      }
    }
  }
</script>

Codepen

How to change Navigation Bar color in iOS 7?

Doing what the original question asked—to get the old Twitter's Nav Bar look, blue background with white text—is very easy to do just using the Interface Builder in Xcode.

Using the Document Outline, select your Navigation Bar.
In the Attributes Inspector, in the Navigation Bar group, change the Style from Default to Black. This changes the background colour of the Navigation and Status bars to black, and their text to white. So the battery and other icons and text in the status bar will look white when the app is running.
In the same Navigation Bar group, change the Bar Tint to the colour of your liking.
If you have Bar Button items in your Navigation Bar, those will still show their text in the default blue colour, so in the Attributes Inspector, View group, change the Tint to White Colour.

That should get you what you want. Here is a screenshot that would make it easier to see where to make the changes.

Where to make the necessary changes, including the result in iOS Simulator

Note that changing only the Bar Tint doesn't change the text colour in the Navigation Bar or the Status Bar. The Style also needs to be changed.

Online Internet Explorer Simulators

You could try Firebug Lite

It's a pure JavaScript-implementation of Firebug that runs directly in any browser (at least in all major ones: IE6+, Firefox, Opera, Safari and Chrome)

You'll still need the VM to actually run IE, but at least you'll get a quicker testing cycle.

R Language: How to print the first or last rows of a data set?

If you want to print the last 10 lines, use

tail(dataset, 10)

for the first 10, you could also do

head(dataset, 10)

Correct way to detach from a container without stopping it

You can use the --detach-keys option when you run docker attach to override the default CTRL+P, CTRL + Q sequence (that doesn't always work).

For example, when you run docker attach --detach-keys="ctrl-a" test and you press CTRL+A you will exit the container, without killing it.

Other examples:

docker attach --detach-keys="ctrl-a,x" test - press CTRL+A and then X to exit
docker attach --detach-keys="a,b,c" test - press A, then B, then C to exit

Extract from the official documentation:

If you want, you can configure an override the Docker key sequence for detach. This is useful if the Docker default sequence conflicts with key sequence you use for other applications. There are two ways to define your own detach key sequence, as a per-container override or as a configuration property on your entire configuration.

To override the sequence for an individual container, use the --detach-keys="<sequence>" flag with the docker attach command. The format of the <sequence> is either a letter [a-Z], or the ctrl- combined with any of the following:

a-z (a single lowercase alpha character )
@ (at sign)
[ (left bracket)
\ (two backward slashes)
_ (underscore)
^ (caret)

These a, ctrl-a, X, or ctrl-\\ values are all examples of valid key sequences. To configure a different configuration default key sequence for all containers, see Configuration file section.

Note: This works since docker version 1.10+ (at the time of this answer, the current version is 18.03)

Launching a website via windows commandline

Using a CLI, the easiest way (cross-platform) I've found is to use the NPM package https://github.com/sindresorhus/open-cli

npm install --global open-cli

Installing it globally allows running something like open-cli https://unlyed.github.io/next-right-now/.

You can also install it locally (e.g: in a project) and run npx open-cli https://unlyed.github.io/next-right-now/

Or, using a NPM script (which is how I actually use it): "doc:online": "open-cli https://unlyed.github.io/next-right-now/",

Running yarn doc:online will open the webpage, and this works on any platform (windows, mac, linux).

Laravel-5 how to populate select box from database with id value and name value

Laravel >= 5.3 method lists() is deprecated use pluck()

$items = Items::pluck('name', 'id');

{!! Form::select('items', $items, null, ['class' => 'some_css_class']) !!}

This will give you a select box with same select options as id numbers in DB

for example if you have this in your DB table:

id name
1  item1
2  item2
3  item3
4  item4

in select box it will be like this

<select>
<option value="1">item1</option>
<option value="2">item2</option>
<option value="3">item3</option>
<option value="4">item4</option>
</select>

I found out that pluck now returns a collection, and you need to add ->toArray() at the end of pluck...so like this: pluck('name', 'id')->toArray();

Reverse a comparator in Java 8

Java 8 Comparator interface has a reversed method : https://docs.oracle.com/javase/8/docs/api/java/util/Comparator.html#reversed--

Android Writing Logs to text File

This variant is much shorter

try {
    final File path = new File(
            Environment.getExternalStorageDirectory(), "DBO_logs5");
    if (!path.exists()) {
        path.mkdir();
    }
    Runtime.getRuntime().exec(
            "logcat  -d -f " + path + File.separator
                    + "dbo_logcat"
                    + ".txt");
} catch (IOException e) {
    e.printStackTrace();
}

How to append data to div using JavaScript?

you can use jQuery. which make it very simple.

just download the jQuery file add jQuery into your HTML
or you can user online link:

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>

and try this:

 $("#divID").append(data);

Detect if a NumPy array contains at least one non-numeric value?

This should be faster than iterating and will work regardless of shape.

numpy.isnan(myarray).any()

Edit: 30x faster:

import timeit
s = 'import numpy;a = numpy.arange(10000.).reshape((100,100));a[10,10]=numpy.nan'
ms = [
    'numpy.isnan(a).any()',
    'any(numpy.isnan(x) for x in a.flatten())']
for m in ms:
    print "  %.2f s" % timeit.Timer(m, s).timeit(1000), m

Results:

  0.11 s numpy.isnan(a).any()
  3.75 s any(numpy.isnan(x) for x in a.flatten())

Bonus: it works fine for non-array NumPy types:

>>> a = numpy.float64(42.)
>>> numpy.isnan(a).any()
False
>>> a = numpy.float64(numpy.nan)
>>> numpy.isnan(a).any()
True

Xlib: extension "RANDR" missing on display ":21". - Trying to run headless Google Chrome

jeues answer helped me nothing :-( after hours I finally found the solution for my system and I think this will help other people too. I had to set the LD_LIBRARY_PATH like this:

   export LD_LIBRARY_PATH=/usr/lib/x86_64-linux-gnu/

after that everything worked very well, even without any "-extension RANDR" switch.

What is stdClass in PHP?

php.net manual has a few solid explanation and examples contributed by users of what stdClass is, I especially like this one http://php.net/manual/en/language.oop5.basic.php#92123, https://stackoverflow.com/a/1434375/2352773.

stdClass is the default PHP object. stdClass has no properties, methods or parent. It does not support magic methods, and implements no interfaces.

When you cast a scalar or array as Object, you get an instance of stdClass. You can use stdClass whenever you need a generic object instance.

stdClass is NOT a base class! PHP classes do not automatically inherit from any class. All classes are standalone, unless they explicitly extend another class. PHP differs from many object-oriented languages in this respect.

You could define a class that extends stdClass, but you would get no benefit, as stdClass does nothing.

Parsing HTML using Python

So that I can ask it to get me the content/text in the div tag with class='container' contained within the body tag, Or something similar.

try: 
    from BeautifulSoup import BeautifulSoup
except ImportError:
    from bs4 import BeautifulSoup
html = #the HTML code you've written above
parsed_html = BeautifulSoup(html)
print(parsed_html.body.find('div', attrs={'class':'container'}).text)

You don't need performance descriptions I guess - just read how BeautifulSoup works. Look at its official documentation.

npm throws error without sudo

For me, execute only

sudo chown -R $(whoami) ~/.npm

doesn't work. Then, I execute too

sudo chown -R $(whoami) /usr/lib/node_modules/
sudo chown -R $(whoami) /usr/bin/node
sudo chown -R $(whoami) /usr/bin/npm

And all works fine!

Seeing the underlying SQL in the Spring JdbcTemplate?

I use this line for Spring Boot applications:

logging.level.org.springframework.jdbc.core = TRACE

This approach pretty universal and I usually use it for any other classes inside my application.

google map API zoom range

Available Zoom Levels

Zoom level 0 is the most zoomed out zoom level available and each integer step in zoom level halves the X and Y extents of the view and doubles the linear resolution.

Google Maps was built on a 256x256 pixel tile system where zoom level 0 was a 256x256 pixel image of the whole earth. A 256x256 tile for zoom level 1 enlarges a 128x128 pixel region from zoom level 0.

As correctly stated by bkaid, the available zoom range depends on where you are looking and the kind of map you are using:

Road maps - seem to go up to zoom level 22 everywhere
Hybrid and satellite maps - the max available zoom levels depend on location. Here are some examples:
Remote regions of Antarctica: 13
Gobi Desert: 17
Much of the U.S. and Europe: 21
"Deep zoom" locations: 22-23 (see bkaid's link)

Note that these values are for the Google Static Maps API which seems to give one more zoom level than the Javascript API. It appears that the extra zoom level available for Static Maps is just an upsampled version of the max-resolution image from the Javascript API.

Map Scale at Various Zoom Levels

Google Maps uses a Mercator projection so the scale varies substantially with latitude. A formula for calculating the correct scale based on latitude is:

meters_per_pixel = 156543.03392 * Math.cos(latLng.lat() * Math.PI / 180) / Math.pow(2, zoom)

Formula is from Chris Broadfoot's comment.

Google Maps basics

Zoom Level - zoom

0 - 19

0 lowest zoom (whole world)

19 highest zoom (individual buildings, if available) Retrieve current zoom level using mapObject.getZoom()

What you're looking for are the scales for each zoom level. Use these:

20 : 1128.497220
19 : 2256.994440
18 : 4513.988880
17 : 9027.977761
16 : 18055.955520
15 : 36111.911040
14 : 72223.822090
13 : 144447.644200
12 : 288895.288400
11 : 577790.576700
10 : 1155581.153000
9  : 2311162.307000
8  : 4622324.614000
7  : 9244649.227000
6  : 18489298.450000
5  : 36978596.910000
4  : 73957193.820000
3  : 147914387.600000
2  : 295828775.300000
1  : 591657550.500000

How do I download a package from apt-get without installing it?

There are a least these apt-get extension packages that can help:

apt-offline - offline apt package manager
apt-zip - Update a non-networked computer using apt and removable media

This is specifically for the case of wanting to download where you have network access but to install on another machine where you do not.

Otherwise, the --download-only option to apt-get is your friend:

 -d, --download-only
     Download only; package files are only retrieved, not unpacked or installed.
     Configuration Item: APT::Get::Download-Only.

Confused about stdin, stdout and stderr?

A file with associated buffering is called a stream and is declared to be a pointer to a defined type FILE. The fopen() function creates certain descriptive data for a stream and returns a pointer to designate the stream in all further transactions. Normally there are three open streams with constant pointers declared in the header and associated with the standard open files. At program startup three streams are predefined and need not be opened explicitly: standard input (for reading conventional input), standard output (for writing conventional output), and standard error (for writing diagnostic output). When opened the standard error stream is not fully buffered; the standard input and standard output streams are fully buffered if and only if the stream can be determined not to refer to an interactive device

https://www.mkssoftware.com/docs/man5/stdio.5.asp

How do I loop through items in a list box and then remove those item?

while(listbox.Items.Remove(s)) ; should work, as well. However, I think the backwards solution is the fastest.

What is the bower (and npm) version syntax?

You can also use the latest keyword to install the most recent version available:

  "dependencies": {
    "fontawesome": "latest"
  }

Do Git tags only apply to the current branch?

CharlesB's answer and helmbert's answer are both helpful, but it took me a while to understand them. Here's another way of putting it:

A tag is a pointer to a commit, and commits exist independently of branches.
- It is important to understand that tags have no direct relationship with branches - they only ever identify a commit.
  - That commit can be pointed to from any number of branches - i.e., it can be part of the history of any number of branches - including none.
- Therefore, running git show <tag> to see a tag's details contains no reference to any branches, only the ID of the commit that the tag points to.
  - (Commit IDs (a.k.a. object names or SHA-1 IDs) are 40-character strings composed of hex. digits that are hashes over the contents of a commit; e.g.: 6f6b5997506d48fc6267b0b60c3f0261b6afe7a2)

Branches come into play only indirectly:
- At the time of creating a tag, by implying the commit that the tag will point to:
  - Not specifying a target for a tag defaults to the current branch's most recent commit (a.k.a. HEAD); e.g.:
    - git tag v0.1.0 # tags HEAD of *current* branch
  - Specifying a branch name as the tag target defaults to that branch's most recent commit; e.g.:
    - git tag v0.1.0 develop # tags HEAD of 'develop' branch
  - (As others have noted, you can also specify a commit ID explicitly as the tag's target.)
- When using git describe to describe the current branch:
  - git describe [--tags] describes the current branch in terms of the commits since the most recent [possibly lightweight] tag in this branch's history.
  - Thus, the tag referenced by git describe may NOT reflect the most recently created tag overall.

WebService Client Generation Error with JDK8

This works on jdk1.8.0_65

wsimport -J-Djavax.xml.accessExternalSchema=all -keep -verbose https://your webservice url?wsdl

How to collapse blocks of code in Eclipse?

You can do ( Ctrl + Numpad_Divide ) to enable folding.
Also if you Right Click on the area where the + or - was supposed to be, you can see there is a folding option.

Remove the last character from a string

You can use substr:

echo substr('a,b,c,d,e,', 0, -1);
# => 'a,b,c,d,e'

How to put text over images in html?

You need to use absolutely-positioned CSS over a relatively-positioned img tag. The article Text Blocks Over Image gives a step-by-step example for placing text over an image.

NameError: global name 'xrange' is not defined in Python 3

add xrange=range in your code :) It works to me.

How does Google calculate my location on a desktop?

So Google keep records of Wifi router location by using any cellphone GPS that connected to that router when you use Google maps or location on cellphone. then google knows every device that connected to that Wifi router uses the same location.
when GPS off or no cellphone connected to router Google uses IP geolocation

Check if a JavaScript string is a URL

One function that I have been using to validate a URL "string" is:

var matcher = /^(?:\w+:)?\/\/([^\s\.]+\.\S{2}|localhost[\:?\d]*)\S*$/;

function isUrl(string){
  return matcher.test(string);
}

This function will return a boolean whether the string is a URL.

Examples:

isUrl("https://google.com");     // true
isUrl("http://google.com");      // true
isUrl("http://google.de");       // true
isUrl("//google.de");            // true
isUrl("google.de");              // false
isUrl("http://google.com");      // true
isUrl("http://localhost");       // true
isUrl("https://sdfasd");         // false

What is "origin" in Git?

origin is the default alias to the URL of your remote repository.

java.lang.ClassCastException

According to the documentation:

Thrown to indicate that the code has attempted to cast an Object to a subclass of which it is not an instance. For example, the following code generates a ClassCastException:

Object x = new Integer(0);
System.out.println((String)x);

When should you use a class vs a struct in C++?

The only time I use a struct instead of a class is when declaring a functor right before using it in a function call and want to minimize syntax for the sake of clarity. e.g.:

struct Compare { bool operator() { ... } };
std::sort(collection.begin(), collection.end(), Compare());

How to watch and compile all TypeScript sources?

Technically speaking you have a few options here:

If you are using an IDE like Sublime Text and integrated MSN plugin for Typescript: http://blogs.msdn.com/b/interoperability/archive/2012/10/01/sublime-text-vi-emacs-typescript-enabled.aspx you can create a build system which compile the .ts source to .js automatically. Here is the explanation how you can do it: How to configure a Sublime Build System for TypeScript.

You can define even to compile the source code to destination .js file on file save. There is a sublime package hosted on github: https://github.com/alexnj/SublimeOnSaveBuild which make this happen, only you need to include the ts extension in the SublimeOnSaveBuild.sublime-settings file.

Another possibility would be to compile each file in the command line. You can compile even multiple files at once by separating them with spaces like so: tsc foo.ts bar.ts. Check this thread: How can I pass multiple source files to the TypeScript compiler?, but i think the first option is more handy.

Python spacing and aligning strings

@IronMensan's format method answer is the way to go. But in the interest of answering your question about ljust:

>>> def printit():
...     print 'Location: 10-10-10-10'.ljust(40) + 'Revision: 1'
...     print 'District: Tower'.ljust(40) + 'Date: May 16, 2012'
...     print 'User: LOD'.ljust(40) + 'Time: 10:15'
...
>>> printit()
Location: 10-10-10-10                   Revision: 1
District: Tower                         Date: May 16, 2012
User: LOD                               Time: 10:15

Edit to note this method doesn't require you to know how long your strings are. .format() may also, but I'm not familiar enough with it to say.

>>> uname='LOD'
>>> 'User: {}'.format(uname).ljust(40) + 'Time: 10:15'
'User: LOD                               Time: 10:15'
>>> uname='Tiddlywinks'
>>> 'User: {}'.format(uname).ljust(40) + 'Time: 10:15'
'User: Tiddlywinks                       Time: 10:15'

'react-scripts' is not recognized as an internal or external command

Try:

rm -rf node_modules && npm install

Wiping node_modules first, often tends to fix a lot of weird, package related issues like that in Node.

git pull while not in a git directory

This might be a similar problem, but you can also simply chain you commands. eg

On one line

cd ~/Sites/yourdir/web;git pull origin master

Or via SSH.

ssh [email protected] -t "cd ~/Sites/thedir/web;git pull origin master"

Warnings Your Apk Is Using Permissions That Require A Privacy Policy: (android.permission.READ_PHONE_STATE)

I was facing same issue and got the error while uploading apk to Google play. I used ads in my app, and I was not even mentioned READ_PHONE_STATE permission in my manifest file. but yet I got this error. Then I change dependencies for ads in build.gradle file. and then it solved my issue. They solved this issue in 12.0.1.

compile 'com.google.android.gms:play-services-ads:12.0.1'

How do I return a string from a regex match in python?

Considering there might be several img tags I would recommend re.findall:

import re

with open("sample.txt", 'r') as f_in, open('writetest.txt', 'w') as f_out:
    for line in f_in:
        for img in re.findall('<img[^>]+>', line):
            print >> f_out, "yo it's a {}".format(img)

IntelliJ inspection gives "Cannot resolve symbol" but still compiles code

If all my pom.xml files are configured correctly and I still have issues with Maven in IntelliJ I do the following steps

Read how to use maven in IntelliJ lately
Make sure IntelliJ is configured to use Bundled Maven 3
Find and TERMINATE actual java process that is executing Maven 3 repos indexing for IntelliJ(Termination can be done while IntelliJ is running). In case any problems with indices or dependencies not available(thought repositories were configured in pom.xml).
Forced Update for all repositories in "IntelliJ / Settings / Build Tools / Maven / Repositories / ". Takes most of the time, disk space and bandwidth! Took me 20+ minutes to update index for Maven central repo.
Hit Re-import all Maven project once again from IntelliJ
It is a good practice to do steps 1-4 to leave IntelliJ and its demon java processes running over night, if you have multiple repositories and a complex project, so you have everything in sync for the next day. You can in theory use all popular indexed repos out there and launch index update for all repos at the same time(I suppose IntelliJ creates a queue and runs updates one after another) then it can take hours to complete(you will need to increase heap space for that too).

P.S. I've spent hours to understand(step 3) that IntelliJ's java demon process that handles maven index update was doing something wrong and I simply need to make IntelliJ to start it from scratch. Problem was solved without even restarting IntelliJ itself.

Fastest way to find second (third...) highest/lowest value in vector or column

Here is an easy way to find the indices of N smallest/largest values in a vector(Example for N = 3):

N <- 3

N Smallest:

ndx <- order(x)[1:N]

N Largest:

ndx <- order(x, decreasing = T)[1:N]

So you can extract the values as:

x[ndx]

Init array of structs in Go

It looks like you are trying to use (almost) straight up C code here. Go has a few differences.

First off, you can't initialize arrays and slices as const. The term const has a different meaning in Go, as it does in C. The list should be defined as var instead.
Secondly, as a style rule, Go prefers basenameOpts as opposed to basename_opts.
There is no char type in Go. You probably want byte (or rune if you intend to allow unicode codepoints).
The declaration of the list must have the assignment operator in this case. E.g.: var x = foo.
Go's parser requires that each element in a list declaration ends with a comma. This includes the last element. The reason for this is because Go automatically inserts semi-colons where needed. And this requires somewhat stricter syntax in order to work.

For example:

type opt struct {
    shortnm      byte
    longnm, help string
    needArg      bool
}

var basenameOpts = []opt { 
    opt {
        shortnm: 'a', 
        longnm: "multiple", 
        needArg: false, 
        help: "Usage for a",
    },
    opt {
        shortnm: 'b', 
        longnm: "b-option", 
        needArg: false, 
        help: "Usage for b",
    },
}

An alternative is to declare the list with its type and then use an init function to fill it up. This is mostly useful if you intend to use values returned by functions in the data structure. init functions are run when the program is being initialized and are guaranteed to finish before main is executed. You can have multiple init functions in a package, or even in the same source file.

    type opt struct {
        shortnm      byte
        longnm, help string
        needArg      bool
    }

    var basenameOpts []opt

    func init() { 
        basenameOpts = []opt{
            opt {
                shortnm: 'a', 
                longnm: "multiple", 
                needArg: false, 
                help: "Usage for a",
            },
            opt {
                shortnm: 'b', 
                longnm: "b-option", 
                needArg: false, 
               help: "Usage for b",
            },
        }
    }

Since you are new to Go, I strongly recommend reading through the language specification. It is pretty short and very clearly written. It will clear a lot of these little idiosyncrasies up for you.

How to prevent going back to the previous activity?

My suggestion would be to finish the activity that you don't want the users to go back to. For instance, in your sign in activity, right after you call startActivity, call finish(). When the users hit the back button, they will not be able to go to the sign in activity because it has been killed off the stack.

react change class name on state change

Below is a fully functional example of what I believe you're trying to do (with a functional snippet).

Explanation

Based on your question, you seem to be modifying 1 property in state for all of your elements. That's why when you click on one, all of them are being changed.

In particular, notice that the state tracks an index of which element is active. When MyClickable is clicked, it tells the Container its index, Container updates the state, and subsequently the isActive property of the appropriate MyClickables.

Example

_x000D_

class Container extends React.Component {_x000D_
  state = {_x000D_
    activeIndex: null_x000D_
  }_x000D_
_x000D_
  handleClick = (index) => this.setState({ activeIndex: index })_x000D_
_x000D_
  render() {_x000D_
    return <div>_x000D_
      <MyClickable name="a" index={0} isActive={ this.state.activeIndex===0 } onClick={ this.handleClick } />_x000D_
      <MyClickable name="b" index={1} isActive={ this.state.activeIndex===1 } onClick={ this.handleClick }/>_x000D_
      <MyClickable name="c" index={2} isActive={ this.state.activeIndex===2 } onClick={ this.handleClick }/>_x000D_
    </div>_x000D_
  }_x000D_
}_x000D_
_x000D_
class MyClickable extends React.Component {_x000D_
  handleClick = () => this.props.onClick(this.props.index)_x000D_
  _x000D_
  render() {_x000D_
    return <button_x000D_
      type='button'_x000D_
      className={_x000D_
        this.props.isActive ? 'active' : 'album'_x000D_
      }_x000D_
      onClick={ this.handleClick }_x000D_
    >_x000D_
      <span>{ this.props.name }</span>_x000D_
    </button>_x000D_
  }_x000D_
}_x000D_
_x000D_
ReactDOM.render(<Container />, document.getElementById('app'))

_x000D_

button {_x000D_
  display: block;_x000D_
  margin-bottom: 1em;_x000D_
}_x000D_
_x000D_
.album>span:after {_x000D_
  content: ' (an album)';_x000D_
}_x000D_
_x000D_
.active {_x000D_
  font-weight: bold;_x000D_
}_x000D_
_x000D_
.active>span:after {_x000D_
  content: ' ACTIVE';_x000D_
}

_x000D_

<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.6.1/react.min.js"></script>_x000D_
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.6.1/react-dom.min.js"></script>_x000D_
<div id="app"></div>

_x000D_

Update: "Loops"

In response to a comment about a "loop" version, I believe the question is about rendering an array of MyClickable elements. We won't use a loop, but map, which is typical in React + JSX. The following should give you the same result as above, but it works with an array of elements.

// New render method for `Container`
render() {
  const clickables = [
    { name: "a" },
    { name: "b" },
    { name: "c" },
  ]

  return <div>
      { clickables.map(function(clickable, i) {
          return <MyClickable key={ clickable.name }
            name={ clickable.name }
            index={ i }
            isActive={ this.state.activeIndex === i }
            onClick={ this.handleClick }
          />
        } )
      }
  </div>
}

JQuery refresh select box

Read a zipped file as a pandas DataFrame

I think you want to open the ZipFile, which returns a file-like object, rather than read:

In [11]: crime2013 = pd.read_csv(z.open('crime_incidents_2013_CSV.csv'))

In [12]: crime2013
Out[12]:
<class 'pandas.core.frame.DataFrame'>
Int64Index: 24567 entries, 0 to 24566
Data columns (total 15 columns):
CCN                            24567  non-null values
REPORTDATETIME                 24567  non-null values
SHIFT                          24567  non-null values
OFFENSE                        24567  non-null values
METHOD                         24567  non-null values
LASTMODIFIEDDATE               24567  non-null values
BLOCKSITEADDRESS               24567  non-null values
BLOCKXCOORD                    24567  non-null values
BLOCKYCOORD                    24567  non-null values
WARD                           24563  non-null values
ANC                            24567  non-null values
DISTRICT                       24567  non-null values
PSA                            24567  non-null values
NEIGHBORHOODCLUSTER            24263  non-null values
BUSINESSIMPROVEMENTDISTRICT    3613  non-null values
dtypes: float64(4), int64(1), object(10)

How do I set a checkbox in razor view?

The syntax in your last line is correct.

 @Html.CheckBoxFor(x => x.Test, new { @checked = "checked" })

That should definitely work. It is the correct syntax. If you have an existing model and AllowRating is set to true then MVC will add the checked attribute automatically. If AllowRating is set to false MVC won't add the attribute however if desired you can using the above syntax.

String.equals versus ==

@Melkhiah66 You can use equals method instead of '==' method to check the equality. If you use intern() then it checks whether the object is in pool if present then returns equal else unequal. equals method internally uses hashcode and gets you the required result.


public class Demo
{
  public static void main(String[] args)
  {
              String str1 = "Jorman 14988611";
    String str2 = new StringBuffer("Jorman").append(" 14988611").toString();
    String str3 = str2.intern();
    System.out.println("str1 == str2 " + (str1 == str2));           //gives false
    System.out.println("str1 == str3 " + (str1 == str3));           //gives true
    System.out.println("str1 equals str2 " + (str1.equals(str2)));  //gives true
    System.out.println("str1 equals str3 " + (str1.equals(str3)));  //gives true
  }
}

Programs & Examples On #Cellular automata

Correct syntax to compare values in JSTL <c:if test="${values.type}=='object'">

See also:

See also:

document.body.appendChild(i)

Git push error pre-receive hook declined

"Not allowed to load local resource: file:///C:....jpg" Java EE Tomcat

mysql_connect(): The mysql extension is deprecated and will be removed in the future: use mysqli or PDO instead

Replace HTML page with contents retrieved via AJAX

How can I check if a view is visible or not in Android?

How do I change the ID of a HTML element with JavaScript?

indexOf and lastIndexOf in PHP?

CSS transition shorthand with multiple properties?

How to draw a filled circle in Java?

Read file from aws s3 bucket using node fs

How to generate random float number in C

Create a File object in memory from a string in Java

Laravel view not found exception

Setting DataContext in XAML in WPF

Keep only date part when using pandas.to_datetime

Excel how to fill all selected blank cells with text

ValueError: invalid literal for int () with base 10

Answer:

Previous guess at answer before we had the traceback:

Advice on code style:

OracleCommand SQL Parameters Binding

How do I set default terminal to terminator?

How to prevent colliders from passing through each other?

Run react-native application on iOS device directly from command line?

How to execute an action before close metro app WinJS

Creating csv file with php

"Series objects are mutable and cannot be hashed" error

How to solve npm error "npm ERR! code ELIFECYCLE"

PHP unable to load php_curl.dll extension

Is try-catch like error handling possible in ASP Classic?

Working around MySQL error "Deadlock found when trying to get lock; try restarting transaction"

Transport security has blocked a cleartext HTTP

Should I use @EJB or @Inject

What is the correct target for the JAVA_HOME environment variable for a Linux OpenJDK Debian-based distribution?

Xcode error "Could not find Developer Disk Image"

Passing multiple values for a single parameter in Reporting Services

How do I log a Python error with debug information?

Configuring angularjs with eclipse IDE

How to get a key in a JavaScript object by its value?

Xcode process launch failed: Security

Open Facebook Page in Facebook App (if installed) on Android

Convert UTF-8 with BOM to UTF-8 with no BOM in Python

Is there a jQuery unfocus method?

URL encode sees “&” (ampersand) as “&amp;” HTML entity

Shortcut to create properties in Visual Studio?

Sending SOAP request using Python Requests

How can I get date and time formats based on Culture Info?

No default constructor found; nested exception is java.lang.NoSuchMethodException with Spring MVC?

How to find a value in an excel column by vba code Cells.Find

What's the difference between primitive and reference types?

typesafe select onChange event using reactjs and typescript

Setting initial values on load with Select2 with Ajax

Loop through files in a folder using VBA?

How to take backup of a single table in a MySQL database?

Invoke or BeginInvoke cannot be called on a control until the window handle has been created

Android: adbd cannot run as root in production builds

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

how to check if string value is in the Enum list?

jQuery get the name of a select option

Installing lxml module in python

How to get height of Keyboard?

Is < faster than <=?

How to create a Multidimensional ArrayList in Java?

Good examples using java.util.logging

Adding quotes to a string in VBScript

Passing data between different controller action methods

T-SQL: Selecting rows to delete via joins

Git SSH error: "Connect to host: Bad file number"

switch case statement error: case expressions must be constant expression

Stop UIWebView from "bouncing" vertically?

How to get element-wise matrix multiplication (Hadamard product) in numpy?

Dynamic LINQ OrderBy on IEnumerable<T> / IQueryable<T>

Convert ASCII number to ASCII Character in C

How do I negate a test with regular expressions in a bash script?

Importing CommonCrypto in a Swift framework

URL encode sees “&” (ampersand) as “&” HTML entity