jQuery - replace all instances of a character in a string

You need to use a regular expression, so that you can specify the global (g) flag:

var s = 'some+multi+word+string'.replace(/\+/g, ' ');

(I removed the $() around the string, as replace is not a jQuery method, so that won't work at all.)

C#: Looping through lines of multiline string

I know this has been answered, but I'd like to add my own answer:

using (var reader = new StringReader(multiLineString))
{
    for (string line = reader.ReadLine(); line != null; line = reader.ReadLine())
    {
        // Do something with the line
    }
}

Matching a space in regex

In Perl the switch is \s (whitespace).

Error: Selection does not contain a main type

The entry point for Java programs is the method:

public static void main(String[] args) {
    //Code
}

If you do not have this, your program will not run.

How to connect to remote Oracle DB with PL/SQL Developer?

In the "database" section of the logon dialog box, enter //hostname.domain:port/database, in your case //123.45.67.89:1521/TEST - this assumes that you don't want to set up a tnsnames.ora file/entry for some reason.

Also make sure the firewall settings on your server are not blocking port 1521.

Avoiding "resource is out of sync with the filesystem"

Just right click on the file or on the project and click Refresh. The error will vanish. I also faced the same issue and it worked for me.

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

Shortest One Liner (also extremely fast):

 text.replace(/(^\w|\s\w)/g, m => m.toUpperCase());

Explanation:

^\w : first character of the string
| : or
\s\w : first character after whitespace
(^\w|\s\w) Capture the pattern.
g Flag: Match all occurrences.

If you want to make sure the rest is in lowercase:

text.replace(/(^\w|\s\w)(\S*)/g, (_,m1,m2) => m1.toUpperCase()+m2.toLowerCase())

Python vs Bash - In which kind of tasks each one outruns the other performance-wise?

Performance wise both can do equally the same, so the question becomes which saves more development time?

Bash relies on calling other commands, and piping them for creating new ones. This has the advantage that you can quickly create new programs just with the code borrowed from other people, no matter what programming language they used.

This also has the side effect of resisting change in sub-commands pretty well, as the interface between them is just plain text.

Additionally Bash is very permissive on how you can write on it. This means it will work well for a wider variety of context, but it also relies on the programmer having the intention of coding in a clean safe manner. Otherwise Bash won't stop you from building a mess.

Python is more structured on style, so a messy programmer won't be as messy. It will also work on operating systems outside Linux, making it instantly more appropriate if you need that kind of portability.

But it isn't as simple for calling other commands. So if your operating system is Unix most likely you will find that developing on Bash is the fastest way to develop.

When to use Bash:

It's a non graphical program, or the engine of a graphical one.
It's only for Unix.

When to use Python:

It's a graphical program.
It shall work on Windows.

To check if string contains particular word

Not as complicated as they say, check this you will not regret.

String sentence = "Check this answer and you can find the keyword with this code";
String search  = "keyword";

if ( sentence.toLowerCase().indexOf(search.toLowerCase()) != -1 ) {

   System.out.println("I found the keyword");

} else {

   System.out.println("not found");

}

You can change the toLowerCase() if you want.

Lombok added but getters and setters not recognized in Intellij IDEA

It is a combination of

Ticking the "Enable annotation processing" checkbox in Settings->Compiler->Annotation Processors.

and
Install the plugin of Lombok for idea and restart for change to take effect.

What is an example of the simplest possible Socket.io example?

Edit: I feel it's better for anyone to consult the excellent chat example on the Socket.IO getting started page. The API has been quite simplified since I provided this answer. That being said, here is the original answer updated small-small for the newer API.

Just because I feel nice today:

index.html

<!doctype html>
<html>
    <head>
        <script src='/socket.io/socket.io.js'></script>
        <script>
            var socket = io();

            socket.on('welcome', function(data) {
                addMessage(data.message);

                // Respond with a message including this clients' id sent from the server
                socket.emit('i am client', {data: 'foo!', id: data.id});
            });
            socket.on('time', function(data) {
                addMessage(data.time);
            });
            socket.on('error', console.error.bind(console));
            socket.on('message', console.log.bind(console));

            function addMessage(message) {
                var text = document.createTextNode(message),
                    el = document.createElement('li'),
                    messages = document.getElementById('messages');

                el.appendChild(text);
                messages.appendChild(el);
            }
        </script>
    </head>
    <body>
        <ul id='messages'></ul>
    </body>
</html>

app.js

var http = require('http'),
    fs = require('fs'),
    // NEVER use a Sync function except at start-up!
    index = fs.readFileSync(__dirname + '/index.html');

// Send index.html to all requests
var app = http.createServer(function(req, res) {
    res.writeHead(200, {'Content-Type': 'text/html'});
    res.end(index);
});

// Socket.io server listens to our app
var io = require('socket.io').listen(app);

// Send current time to all connected clients
function sendTime() {
    io.emit('time', { time: new Date().toJSON() });
}

// Send current time every 10 secs
setInterval(sendTime, 10000);

// Emit welcome message on connection
io.on('connection', function(socket) {
    // Use socket to communicate with this particular client only, sending it it's own id
    socket.emit('welcome', { message: 'Welcome!', id: socket.id });

    socket.on('i am client', console.log);
});

app.listen(3000);

Defining Z order of views of RelativeLayout in Android

If you want to do this in code you can do

View.bringToFront();

see docs

Math operations from string

You could use this function which is doing the same as the eval() function, but in a simple manner, using a function.

def numeric(equation):
    if '+' in equation:
        y = equation.split('+')
        x = int(y[0])+int(y[1])
    elif '-' in equation:
        y = equation.split('-')
        x = int(y[0])-int(y[1])
    return x

What is the difference between Java RMI and RPC?

RPC is an old protocol based on C.It can invoke a remote procedure and make it look like a local call.RPC handles the complexities of passing that remote invocation to the server and getting the result to client.

Java RMI also achieves the same thing but slightly differently.It uses references to remote objects.So, what it does is that it sends a reference to the remote object alongwith the name of the method to invoke.It is better because it results in cleaner code in case of large programs and also distribution of objects over the network enables multiple clients to invoke methods in the server instead of establishing each connection individually.

What is the `data-target` attribute in Bootstrap 3?

The toggle tells Bootstrap what to do and the target tells Bootstrap which element is going to open. So whenever a link like that is clicked, a modal with an id of “basicModal” will appear.

How do I determine file encoding in OS X?

You can try loading the file into a firefox window then go to View - Character Encoding. There should be a check mark next to the file's encoding type.

Forward host port to docker container

Your docker host exposes an adapter to all the containers. Assuming you are on recent ubuntu, you can run

ip addr

This will give you a list of network adapters, one of which will look something like

3: docker0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP
link/ether 22:23:6b:28:6b:e0 brd ff:ff:ff:ff:ff:ff
inet 172.17.42.1/16 scope global docker0
inet6 fe80::a402:65ff:fe86:bba6/64 scope link
   valid_lft forever preferred_lft forever

You will need to tell rabbit/mongo to bind to that IP (172.17.42.1). After that, you should be able to open connections to 172.17.42.1 from within your containers.

In Perl, how do I create a hash whose keys come from a given array?

You could also use Perl6::Junction.

use Perl6::Junction qw'any';

my @arr = ( 1, 2, 3 );

if( any(@arr) == 1 ){ ... }

how to assign a block of html code to a javascript variable

Just for reference, here is a benchmark of different technique rendering performances,

http://jsperf.com/zp-string-concatenation/6

I can’t find the Android keytool

Ok I did this in Windows 7 32-bit system.

step 1: go to - C:\Program Files\Java\jdk1.6.0_26\bin - and run jarsigner.exe first ( double click)

step2: locate debug.keystore, in my case it was - C:\Users\MyPcName\.android

step3: open command prompt and go to dir - C:\Program Files\Java\jdk1.6.0_26\bin and give the following command: keytool -list -keystore "C:\Users\MyPcName\.android\debug.keystore"

step4: it will ask for Keystore password now. ( which I am figuring out... :-? )

update: OK in my case password was ´ android ´. - (I am using Eclipse for android, so I found it here) Follow the steps in eclipse: Windows>preferences>android>build>..
( Look in `default Debug Keystore´ field.)

Command to change the keystore password (look here): Keystore change passwords

How do I convert a double into a string in C++?

The problem with lexical_cast is the inability to define precision. Normally if you are converting a double to a string, it is because you want to print it out. If the precision is too much or too little, it would affect your output.

Set timeout for webClient.DownloadFile()

My answer comes from here

You can make a derived class, which will set the timeout property of the base WebRequest class:

using System;
using System.Net;

public class WebDownload : WebClient
{
    /// <summary>
    /// Time in milliseconds
    /// </summary>
    public int Timeout { get; set; }

    public WebDownload() : this(60000) { }

    public WebDownload(int timeout)
    {
        this.Timeout = timeout;
    }

    protected override WebRequest GetWebRequest(Uri address)
    {
        var request = base.GetWebRequest(address);
        if (request != null)
        {
            request.Timeout = this.Timeout;
        }
        return request;
    }
}

and you can use it just like the base WebClient class.

add scroll bar to table body

If you don't want to wrap a table under any div:

table{
  table-layout: fixed;
}
tbody{
      display: block;
    overflow: auto;
}

Hiding table data using <div style="display:none">

Unfortuantely, as div elements can't be direct descendants of table elements, the way I know to do this is to apply the CSS rules you want to each tr element that you want to apply it to.

<table>
<tr><th>Test Table</th><tr>
<tr><td>123456789</td><tr>
<tr style="display: none; other-property: value;"><td>123456789</td><tr>
<tr style="display: none; other-property: value;"><td>123456789</td><tr>
<tr><td>123456789</td><tr>
<tr><td>123456789</td><tr>
</table>

If you have more than one CSS rule to apply to the rows in question, give the applicable rows a class instead and offload the rules to external CSS.

<table>
<tr><th>Test Table</th><tr>
<tr><td>123456789</td><tr>
<tr class="something"><td>123456789</td><tr>
<tr class="something"><td>123456789</td><tr>
<tr><td>123456789</td><tr>
<tr><td>123456789</td><tr>
</table>

How to declare a vector of zeros in R

replicate is another option:

replicate(10, 0)
# [1] 0 0 0 0 0 0 0 0 0 0

replicate(5, 1)
# [1] 1 1 1 1 1

To create a matrix:

replicate( 5, numeric(3) )

#     [,1] [,2] [,3] [,4] [,5]
#[1,]    0    0    0    0    0
#[2,]    0    0    0    0    0
#[3,]    0    0    0    0    0

How to calculate 1st and 3rd quartiles?

By using pandas:

df.time_diff.quantile([0.25,0.5,0.75])


Out[793]: 
0.25    0.483333
0.50    0.500000
0.75    0.516667
Name: time_diff, dtype: float64

Java 8, Streams to find the duplicate elements

Basic example. First-half builds the frequency-map, second-half reduces it to a filtered list. Probably not as efficient as Dave's answer, but more versatile (like if you want to detect exactly two etc.)

List<Integer> duplicates = IntStream.of( 1, 2, 3, 2, 1, 2, 3, 4, 2, 2, 2 )
   .boxed()
   .collect( Collectors.groupingBy( Function.identity(), Collectors.counting() ) )
   .entrySet()
   .stream()
   .filter( p -> p.getValue() > 1 )
   .map( Map.Entry::getKey )
   .collect( Collectors.toList() );

Java "?" Operator for checking null - What is it? (Not Ternary!)

Java does not have the exact syntax but as of JDK-8, we have the Optional API with various methods at our disposal. So, the C# version with the use of null conditional operator:

return person?.getName()?.getGivenName();

can be written as follows in Java with the Optional API:

 return Optional.ofNullable(person)
                .map(e -> e.getName())
                .map(e -> e.getGivenName())
                .orElse(null);

if any of person, getName or getGivenName is null then null is returned.

Best way to use multiple SSH private keys on one client

I had run into this issue a while back, when I had two Bitbucket accounts and wanted to had to store separate SSH keys for both. This is what worked for me.

I created two separate ssh configurations as follows.

Host personal.bitbucket.org
    HostName bitbucket.org
    User git
    IdentityFile /Users/username/.ssh/personal
Host work.bitbucket.org
    HostName bitbucket.org
    User git
    IdentityFile /Users/username/.ssh/work

Now when I had to clone a repository from my work account - the command was as follows.

git clone [email protected]:teamname/project.git

I had to modify this command to:

git clone git@**work**.bitbucket.org:teamname/project.git

Similarly the clone command from my personal account had to be modified to

git clone git@personal.bitbucket.org:name/personalproject.git

Refer this link for more information.

Difference between variable declaration syntaxes in Javascript (including global variables)?

Keeping it simple :

a = 0

The code above gives a global scope variable

var a = 0;

This code will give a variable to be used in the current scope, and under it

window.a = 0;

This generally is same as the global variable.

JavaFX Location is not set error message

The answer below by CsPeitch and others is on the right track. Just make sure that the fxml file is being copied over to your class output target, or the runtime will not see it. Check the generated class file directory and see if the fxml is there

How to recover closed output window in netbeans?

Go to window tab - reset windows - run your program. - then right click on bottom of the tab where program running

C++ where to initialize static const

In a translation unit within the same namespace, usually at the top:

// foo.h
struct foo
{
    static const std::string s;
};

// foo.cpp
const std::string foo::s = "thingadongdong"; // this is where it lives

// bar.h
namespace baz
{
    struct bar
    {
        static const float f;
    };
}

// bar.cpp
namespace baz
{
    const float bar::f = 3.1415926535;
}

UIScrollView not scrolling

I made it working at my first try. With auto layout and everything, no additional code. Then a collection view went banana, crashing at run time, I couldn't find what was wrong, so I deleted and recreated it (I am using Xcode 10 Beta 4. It felt like a bug) and then the scrolling was gone. The Collection view worked again, though!

Many hours later.. this is what fixed it for me. I had the following layout:

UIView

Safe Area
Scroll view
- Content view

It's all in the constraints. Safe Area is automatically defined by the system. In the worst case remove all constraints for scroll and content views and do not have IB resetting/creating them for you. Make them manually, it works.

For Scroll view I did: Align Trailing/Top to Safe Area. Equal Width/Height to Safe area.
For Content view I did: Align Trailing/Leading/Top/Bottom to Superview (the scroll view)

basically the concept is to have Content view fitting Scrollview, which is fitting Safe Area.

But as such it didn't work. Content view missed the height. I tried all I could and the only one doing the trick has been a Content view height created control-dragging Content view.. to itself. That defined a fixed height, which value has been computed from the Size of the the view controller (defined as freeform, longer than the real display, to containing all my subviews) and finally it worked again!

PHP fopen() Error: failed to open stream: Permission denied

You may need to change the permissions as an administrator. Open up terminal on your Mac and then open the directory that markers.xml is located in. Then type:

sudo chmod 777 markers.xml

You may be prompted for a password. Also, it could be the directories that don't allow full access. I'm not familiar with WordPress, so you may have to change the permission of each directory moving upward to the mysite directory.

Fastest way to copy a file in Node.js

If you don't care about it being async, and aren't copying gigabyte-sized files, and would rather not add another dependency just for a single function:

function copySync(src, dest) {
  var data = fs.readFileSync(src);
  fs.writeFileSync(dest, data);
}

How to know if other threads have finished?

Here's a solution that is simple, short, easy to understand, and works perfectly for me. I needed to draw to the screen when another thread ends; but couldn't because the main thread has control of the screen. So:

(1) I created the global variable: boolean end1 = false; The thread sets it to true when ending. That is picked up in the mainthread by "postDelayed" loop, where it is responded to.

(2) My thread contains:

void myThread() {
    end1 = false;
    new CountDownTimer(((60000, 1000) { // milliseconds for onFinish, onTick
        public void onFinish()
        {
            // do stuff here once at end of time.
            end1 = true; // signal that the thread has ended.
        }
        public void onTick(long millisUntilFinished)
        {
          // do stuff here repeatedly.
        }
    }.start();

}

(3) Fortunately, "postDelayed" runs in the main thread, so that's where in check the other thread once each second. When the other thread ends, this can begin whatever we want to do next.

Handler h1 = new Handler();

private void checkThread() {
   h1.postDelayed(new Runnable() {
      public void run() {
         if (end1)
            // resond to the second thread ending here.
         else
            h1.postDelayed(this, 1000);
      }
   }, 1000);
}

(4) Finally, start the whole thing running somewhere in your code by calling:

void startThread()
{
   myThread();
   checkThread();
}

Convert a PHP script into a stand-alone windows executable

I tried most of solution given in the 1st answer, the only one that worked for me and is non-commercial is php-desktop.

I simply put my php files in the www/ folder, changed the name of .exe and was able to run my php as an exe !!

Also there is a complete documentation, up to date support, windows and linux (and soon mac) compatibility and options can easily be changed.

Oracle SQL Query for listing all Schemas in a DB

Below sql lists all the schema in oracle that are created after installation ORACLE_MAINTAINED='N' is the filter. This column is new in 12c.

select distinct username,ORACLE_MAINTAINED from dba_users where ORACLE_MAINTAINED='N';

Can you force Vue.js to reload/re-render?

I found a way. It's a bit hacky but works.

vm.$set("x",0);
vm.$delete("x");

Where vm is your view-model object, and x is a non-existent variable.

Vue.js will complain about this in the console log but it does trigger a refresh for all data. Tested with version 1.0.26.

How do you fade in/out a background color using jquery?

I wrote a super simple jQuery plugin to accomplish something similar to this. I wanted something really light weight (it's 732 bytes minified), so including a big plugin or UI was out of the question for me. It's still a little rough around the edges, so feedback is welcome.

You can checkout the plugin here: https://gist.github.com/4569265.

Using the plugin, it would be a simple matter to create a highlight effect by changing the background color and then adding a setTimeout to fire the plugin to fade back to the original background color.

Java Mouse Event Right Click

To avoid any ambiguity, use the utilities methods from SwingUtilities :

SwingUtilities.isLeftMouseButton(MouseEvent anEvent) SwingUtilities.isRightMouseButton(MouseEvent anEvent) SwingUtilities.isMiddleMouseButton(MouseEvent anEvent)

Convert Pandas Column to DateTime

raw_data['Mycol'] =  pd.to_datetime(raw_data['Mycol'], format='%d%b%Y:%H:%M:%S.%f')

works, however it results in a Python warning of A value is trying to be set on a copy of a slice from a DataFrame. Try using .loc[row_indexer,col_indexer] = value instead

I would guess this is due to some chaining indexing.

default select option as blank

In order to show please select a value in drop down and hide it after some value is selected . please use the below code.

it will also support required validation.

_x000D_

<select class="form-control" required>_x000D_
<option disabled selected value style="display:none;">--Please select a value</option>_x000D_
              <option >Data 1</option>_x000D_
              <option >Data 2</option>_x000D_
              <option >Data 3</option>_x000D_
</select>

_x000D_

Difference between malloc and calloc?

calloc is generally malloc+memset to 0

It is generally slightly better to use malloc+memset explicitly, especially when you are doing something like:

ptr=malloc(sizeof(Item));
memset(ptr, 0, sizeof(Item));

That is better because sizeof(Item) is know to the compiler at compile time and the compiler will in most cases replace it with the best possible instructions to zero memory. On the other hand if memset is happening in calloc, the parameter size of the allocation is not compiled in in the calloc code and real memset is often called, which would typically contain code to do byte-by-byte fill up until long boundary, than cycle to fill up memory in sizeof(long) chunks and finally byte-by-byte fill up of the remaining space. Even if the allocator is smart enough to call some aligned_memset it will still be a generic loop.

One notable exception would be when you are doing malloc/calloc of a very large chunk of memory (some power_of_two kilobytes) in which case allocation may be done directly from kernel. As OS kernels will typically zero out all memory they give away for security reasons, smart enough calloc might just return it withoud additional zeroing. Again - if you are just allocating something you know is small, you may be better off with malloc+memset performance-wise.

Creating a triangle with for loops

  for (int i=0; i<6; i++)
  {
     for (int k=0; k<6-i; k++)
     {
        System.out.print(" ");
     }
     for (int j=0; j<i*2+1; j++)
     {
        System.out.print("*");
     }
     System.out.println("");
  }

opening html from google drive

Create a new folder in Drive and share it as "Public on the web."
Upload your HTML, JS & CSS files to this folder.
Open the HTML file & you will see "Preview" button in the toolbar.
Share the URL that looks like www.googledrive.com/host/... from the preview window and anyone can view your web page.

Android overlay a view ontop of everything?

Simply use RelativeLayout or FrameLayout. The last child view will overlay everything else.

Android supports a pattern which Cocoa Touch SDK doesn't: Layout management.
Layout for iPhone means to position everything absolute (besides some strech factors). Layout in android means that children will be placed in relation to eachother.

Example (second EditText will completely cover the first one):

<FrameLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:id="@+id/root_view">

    <EditText
        android:layout_width="fill_parent"
        android:id="@+id/editText1"
        android:layout_height="fill_parent">
    </EditText>

    <EditText
        android:layout_width="fill_parent"
        android:id="@+id/editText2"
        android:layout_height="fill_parent">
        <requestFocus></requestFocus>
    </EditText>

</FrameLayout>

FrameLayout is some kind of view stack. Made for special cases.

RelativeLayout is pretty powerful. You can define rules like View A has to align parent layout bottom, View B has to align A bottom to top, etc

Update based on comment

Usually you set the content with setContentView(R.layout.your_layout) in onCreate (it will inflate the layout for you). You can do that manually and call setContentView(inflatedView), there's no difference.

The view itself might be a single view (like TextView) or a complex layout hierarchy (nested layouts, since all layouts are views themselves).

After calling setContentView your activity knows what its content looks like and you can use (FrameLayout) findViewById(R.id.root_view) to retrieve any view int this hierarchy (General pattern (ClassOfTheViewWithThisId) findViewById(R.id.declared_id_of_view)).

Difference Between $.getJSON() and $.ajax() in jQuery

There is lots of confusion in some of the function of jquery like $.ajax, $.get, $.post, $.getScript, $.getJSON that what is the difference among them which is the best, which is the fast, which to use and when so below is the description of them to make them clear and to get rid of this type of confusions.

$.getJSON() function is a shorthand Ajax function (internally use $.get() with data type script), which is equivalent to below expression, Uses some limited criteria like Request type is GET and data Type is json.

Moment Js UTC to Local Time

To convert UTC time to Local you have to use moment.local().

For more info see docs

Example:

var date = moment.utc().format('YYYY-MM-DD HH:mm:ss');

console.log(date); // 2015-09-13 03:39:27

var stillUtc = moment.utc(date).toDate();
var local = moment(stillUtc).local().format('YYYY-MM-DD HH:mm:ss');

console.log(local); // 2015-09-13 09:39:27

Demo:

_x000D_

var date = moment.utc().format();_x000D_
console.log(date, "- now in UTC"); _x000D_
_x000D_
var local = moment.utc(date).local().format();_x000D_
console.log(local, "- UTC now to local");

_x000D_

<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.22.2/moment.min.js"></script>

_x000D_

What are the sizes used for the iOS application splash screen?

You can make them 1024 x 768. You can also check "Status bar is initially hidden" in the plist file.

What does it mean when Statement.executeUpdate() returns -1?

As the statement executed is not actually DML (eg UPDATE, INSERT or EXECUTE), but a piece of T-SQL which contains DML, I suspect it is not treated as an update-query.

Section 13.1.2.3 of the JDBC 4.1 specification states something (rather hard to interpret btw):

When the method execute returns true, the method getResultSet is called to retrieve the ResultSet object. When execute returns false, the method getUpdateCount returns an int. If this number is greater than or equal to zero, it indicates the update count returned by the statement. If it is -1, it indicates that there are no more results.

Given this information, I guess that executeUpdate() internally does an execute(), and then - as execute() will return false - it will return the value of getUpdateCount(), which in this case - in accordance with the JDBC spec - will return -1.

This is further corroborated by the fact 1) that the Javadoc for Statement.executeUpdate() says:

Returns: either (1) the row count for SQL Data Manipulation Language (DML) statements or (2) 0 for SQL statements that return nothing

And 2) that the Javadoc for Statement.getUpdateCount() specifies:

the current result as an update count; -1 if the current result is a ResultSet object or there are no more results

Just to clarify: given the Javadoc for executeUpdate() the behavior is probably wrong, but it can be explained.

Also as I commented elsewhere, the -1 might just indicate: maybe something was changed, but we simply don't know, or we can't give an accurate number of changes (eg because in this example it is a piece of T-SQL that is executed).

Posting parameters to a url using the POST method without using a form

it can be done with CURL or AJAX. The response is equally cryptic as the answer.

ldap query for group members

The query should be:

(&(objectCategory=user)(memberOf=CN=Distribution Groups,OU=Mybusiness,DC=mydomain.local,DC=com))

You missed & and ()

2 "style" inline css img tags?

You should use :

<img src="http://img705.imageshack.us/img705/119/original120x75.png" style="height:100px;width:100px;" alt="25"/>

That should work!!

If you want to create class then :

.size {
width:100px;
height:100px;
}

and then apply it like :

<img src="http://img705.imageshack.us/img705/119/original120x75.png" class="size" alt="25"/>

by creating a class you can use it at multiple places.

If you want to use only at one place then use inline CSS. Also Inline CSS overrides other CSS.

Java: Static Class?

You can use @UtilityClass annotation from lombok https://projectlombok.org/features/experimental/UtilityClass

Can I replace groups in Java regex?

Sorry to beat a dead horse, but it is kind-of weird that no-one pointed this out - "Yes you can, but this is the opposite of how you use capturing groups in real life".

If you use Regex the way it is meant to be used, the solution is as simple as this:

"6 example input 4".replaceAll("(?:\\d)(.*)(?:\\d)", "number$11");

Or as rightfully pointed out by shmosel below,

"6 example input 4".replaceAll("\d(.*)\d", "number$11");

...since in your regex there is no good reason to group the decimals at all.

You don't usually use capturing groups on the parts of the string you want to discard, you use them on the part of the string you want to keep.

If you really want groups that you want to replace, what you probably want instead is a templating engine (e.g. moustache, ejs, StringTemplate, ...).

As an aside for the curious, even non-capturing groups in regexes are just there for the case that the regex engine needs them to recognize and skip variable text. For example, in

(?:abc)*(capture me)(?:bcd)*

you need them if your input can look either like "abcabccapture mebcdbcd" or "abccapture mebcd" or even just "capture me".

Or to put it the other way around: if the text is always the same, and you don't capture it, there is no reason to use groups at all.

Display images in asp.net mvc

It is possible to use a handler to do this, even in MVC4. Here's an example from one i made earlier:

public class ImageHandler : IHttpHandler
{
    byte[] bytes;

    public void ProcessRequest(HttpContext context)
    {
        int param;
        if (int.TryParse(context.Request.QueryString["id"], out param))
        {
            using (var db = new MusicLibContext())
            {
                if (param == -1)
                {
                    bytes = File.ReadAllBytes(HttpContext.Current.Server.MapPath("~/Images/add.png"));

                    context.Response.ContentType = "image/png";
                }
                else
                {
                    var data = (from x in db.Images
                                where x.ImageID == (short)param
                                select x).FirstOrDefault();

                    bytes = data.ImageData;

                    context.Response.ContentType = "image/" + data.ImageFileType;
                }

                context.Response.Cache.SetCacheability(HttpCacheability.NoCache);
                context.Response.BinaryWrite(bytes);
                context.Response.Flush();
                context.Response.End();
            }
        }
        else
        {
            //image not found
        }
    }

    public bool IsReusable
    {
        get
        {
            return false;
        }
    }
}

In the view, i added the ID of the photo to the query string of the handler.

Get the generated SQL statement from a SqlCommand object?

Extended Kon's code to help debug a stored procedure:

    private void ExtractSqlCommandForDebugging(SqlCommand cmd)
    {
        string sql = "exec " + cmd.CommandText;
        bool first = true;
        foreach (SqlParameter p in cmd.Parameters)
        {
            string value = ((p.Value == DBNull.Value) ? "null"
                            : (p.Value is string) ? "'" + p.Value + "'"
                            : p.Value.ToString());
            if (first)
            {
                sql += string.Format(" {0}={1}", p.ParameterName, value);
                first = false;
            }
            else
            {
                sql += string.Format("\n , {0}={1}", p.ParameterName, value);
            }
        }
        sql += "\nGO";
        Debug.WriteLine(sql);
    }

In my first test case, it generated:

exec dbo.MyStoredProcName @SnailMail=False
 , @Email=True
 , @AcceptSnailMail=False
 , @AcceptEmail=False
 , @DistanceMiles=-1
 , @DistanceLocationList=''
 , @ExcludeDissatisfied=True
 , @ExcludeCodeRed=True
 , @MinAge=null
 , @MaxAge=18
 , @GenderTypeID=-1
 , @NewThisYear=-1
 , @RegisteredThisYear=-1
 , @FormersTermGroupList=''
 , @RegistrationStartDate=null
 , @RegistrationEndDate=null
 , @DivisionList='25'
 , @LocationList='29,30'
 , @OneOnOneOPL=-1
 , @JumpStart=-1
 , @SmallGroup=-1
 , @PurchasedEAP=-1
 , @RedeemedEAP=-1
 , @ReturnPlanYes=False
 , @MinNetPromoter=-1
 , @MinSurveyScore=-1
 , @VIPExclusionTypes='-2'
 , @FieldSelectionMask=65011584
 , @DisplayType=0
GO

You will probably need to add some more conditional "..is..." type assignments, e.g. for dates and times.

Change color and appearance of drop down arrow

The <select> element is generated by the application and styling is not part of the CSS/HTML spec.

You would have to fake it with your own DIV and overlay it on top of the existing one, or build your own control emulating the same functionality.

How do I mount a remote Linux folder in Windows through SSH?

I don't think you can mount a Linux folder as a network drive under windows having only access to ssh. I can suggest you to use WinSCP that allows you to transfer file through ssh and it's free.

EDIT: well, sorry. Vinko posted before me and now i've learned a new thing :)

Auto height of div

Here is the Latest solution of the problem:

In your CSS file write the following class called .clearfix along with the pseudo selector :after

.clearfix:after {
content: "";
display: table;
clear: both;
}

Then, in your HTML, add the .clearfix class to your parent Div. For example:

<div class="clearfix">
    <div></div>
    <div></div>
</div>

It should work always. You can call the class name as .group instead of .clearfix , as it will make the code more semantic. Note that, it is Not necessary to add the dot or even a space in the value of Content between the double quotation "".

Source: http://css-snippets.com/page/2/

No server in Eclipse; trying to install Tomcat

Steps to follow:

1.Goto Help -> Install new Software
2.Give address http://download.eclipse.org/releases/oxygen and name as your choice.
3.Search for Java EE and choose 1.Eclipse Java EE Developer Tools 
4.Search for JST and choose 2.JST Server Adapters 3.JST Server Adapters Extensions
5.Click next and accept the license agreement.

Find the server option in the window-->preferences and add server as you need

Expected response code 250 but got code "530", with message "530 5.7.1 Authentication required

I believe this has been answered in some sections already, just test with gmail for your "MAIL_HOST" instead and don't forget to clear cache. Setup like below: Firstly, you need to setup 2 step verification here google security. An App Password link will appear and you can get your App Password to insert into below "MAIL_PASSWORD". More info on getting App Password here

MAIL_DRIVER=smtp
[email protected]
MAIL_FROM_NAME=DomainName
MAIL_HOST=smtp.gmail.com
MAIL_PORT=587
[email protected]
MAIL_PASSWORD=YOUR_GMAIL_CREATED_APP_PASSWORD
MAIL_ENCRYPTION=tls

Clear cache with:

php artisan config:cache

groovy.lang.MissingPropertyException: No such property: jenkins for class: groovy.lang.Binding

Please double check that jenkins is not blocking this import. Go to script approvals and check to see if it is blocking it. If it is click allow.

https://jenkins.io/doc/book/managing/script-approval/

Store output of sed into a variable

To store the third line into a variable, use below syntax:

variable=`echo "$1" | sed '3q;d' urfile`

To store the changed line into a variable, use below syntax: variable=echo 'overflow' | sed -e "s/over/"OVER"/g" output:OVERflow

jQuery Datepicker localization

If you want to include some options besides regional localization, you have to use $.extend, like this:

$(function() {
   $('#Date').datepicker($.extend({
      showMonthAfterYear: false,
      dateFormat:'d MM, y'
    },
    $.datepicker.regional['fr']
  ));
});

Fit image to table cell [Pure HTML]

if you want to do it with pure HTML solution ,you can delete the border in the table if you want...or you can add align="center" attribute to your img tag like this:

<img align="center" width="100%" height="100%" src="http://dummyimage.com/68x68/000/fff" />

see the fiddle : http://jsfiddle.net/Lk2Rh/27/

but still it better to handling this with CSS, i suggest you that.

I hope this help.

Increasing nesting function calls limit

Personally I would suggest this is an error as opposed to a setting that needs adjusting. In my code it was because I had a class that had the same name as a library within one of my controllers and it seemed to trip it up.

Output errors and see where this is being triggered.

getting the screen density programmatically in android?

Actualy if you want to have the real display dpi the answer is somewhere in between if you query for display metrics:

DisplayMetrics dm = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(dm);
int dpiClassification = dm.densityDpi;
float xDpi = dm.xdpi;
float yDpi = dm.ydpi;

densityDpi * 160 will give you the values/suggestion which density you should use

0.75 - ldpi - 120 dpi
1.0 - mdpi - 160 dpi
1.5 - hdpi - 240 dpi
2.0 - xhdpi - 320 dpi
3.0 - xxhdpi - 480 dpi
4.0 - xxxhdpi - 640 dpi

as specified in previous posts

but dm.xdpi won't give you always the REAL dpi of given display: Example:

Device: Sony ericsson xperia mini pro (SK17i)
Density: 1.0 (e.g. suggests you use 160dpi resources)
xdpi: 193.5238
Real device ppi is arround 193ppi


Device: samsung GT-I8160 (Samsung ace 2)
Density 1.5 (e.g. suggests you use 240dpi resources)
xdpi 160.42105
Real device ppi is arround 246ppi

so maybe real dpi of the display should be Density*xdpi .. but i'm not sure if this is the correct way to do!

Credentials for the SQL Server Agent service are invalid

Use the credential that you use to login to PC. Username can be searched by Clicking in sequence

Advanced -> Find -> Choose your Username -> (e.g. JOHNSMITH_HP/John)

Password must be same as your windows login password

There you go !!

Set UITableView content inset permanently

Probably it was some sort of my mistake because of me messing with autolayouts and storyboard but I found an answer.

You have to take care of this little guy in View Controller's Attribute Inspector asvi

It must be unchecked so the default contentInset wouldn't be set after any change. After that it is just adding one-liner to viewDidLoad:

[self.tableView setContentInset:UIEdgeInsetsMake(108, 0, 0, 0)]; // 108 is only example

iOS 11, Xcode 9 update

Looks like the previous solution is no longer a correct one if it comes to iOS 11 and Xcode 9. automaticallyAdjustsScrollViewInsets has been deprecated and right now to achieve similar effect you have to go to Size Inspector where you can find this:
Also, you can achieve the same in code:

if #available(iOS 11.0, *) {
    scrollView.contentInsetAdjustmentBehavior = .never
} else {
    automaticallyAdjustsScrollViewInsets = false
}

CSS center display inline block?

The accepted solution wouldn't work for me as I need a child element with display: inline-block to be both horizontally and vertically centered within a 100% width parent.

I used Flexbox's justify-content and align-items properties, which respectively allow you to center elements horizontally and vertically. By setting both to center on the parent, the child element (or even multiple elements!) will be perfectly in the middle.

This solution does not require fixed width, which would have been unsuitable for me as my button's text will change.

Here is a CodePen demo and a snippet of the relevant code below:

_x000D_

.parent {
  display: flex;
  justify-content: center;
  align-items: center;
}

_x000D_

<div class="parent">
  <a class="child" href="#0">Button</a>
</div>

_x000D_

Reading an integer from user input

int op = 0;
string in = string.Empty;
do
{
    Console.WriteLine("enter choice");
    in = Console.ReadLine();
} while (!int.TryParse(in, out op));

Validation error: "No validator could be found for type: java.lang.Integer"

As the question is asked simply use @Min(1) instead of @size on integer fields and it will work.

Get HTML5 localStorage keys

You can use the localStorage.key(index) function to return the string representation, where index is the nth object you want to retrieve.

How to use Python requests to fake a browser visit a.k.a and generate User Agent?

Answer

You need to create a header with a proper formatted User agent String, it server to communicate client-server.

You can check your own user agent Here.

Example

Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:47.0) Gecko/20100101 Firefox/47.0
Mozilla/5.0 (Macintosh; Intel Mac OS X x.y; rv:42.0) Gecko/20100101 Firefox/42.0

Third party Package user_agent 0.1.9

I found this module very simple to use, in one line of code it randomly generates a User agent string.

from user_agent import generate_user_agent, generate_navigator
from pprint import pprint

print(generate_user_agent())
# 'Mozilla/5.0 (compatible; MSIE 8.0; Windows NT 6.3; Win64; x64)'

print(generate_user_agent(os=('mac', 'linux')))
# 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8; rv:36.0) Gecko/20100101 Firefox/36.0'

pprint(generate_navigator())

# {'app_code_name': 'Mozilla',
#  'app_name': 'Netscape',
#  'appversion': '5.0',
#  'name': 'firefox',
#  'os': 'linux',
#  'oscpu': 'Linux i686 on x86_64',
#  'platform': 'Linux i686 on x86_64',
#  'user_agent': 'Mozilla/5.0 (X11; Ubuntu; Linux i686 on x86_64; rv:41.0) Gecko/20100101 Firefox/41.0',
#  'version': '41.0'}

pprint(generate_navigator_js())

# {'appCodeName': 'Mozilla',
#  'appName': 'Netscape',
#  'appVersion': '38.0',
#  'platform': 'MacIntel',
#  'userAgent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9; rv:38.0) Gecko/20100101 Firefox/38.0'}

Using a SELECT statement within a WHERE clause

This is a correlated sub-query.

(It is a "nested" query - this is very non-technical term though)

The inner query takes values from the outer-query (WHERE st.Date = ScoresTable.Date) thus it is evaluated once for each row in the outer query.

There is also a non-correlated form in which the inner query is independent as as such is only executed once.

e.g.

 SELECT * FROM ScoresTable WHERE Score = 
   (SELECT MAX(Score) FROM Scores)

There is nothing wrong with using subqueries, except where they are not needed :)

Your statement may be rewritable as an aggregate function depending on what columns you require in your select statement.

SELECT Max(score), Date FROM ScoresTable 
Group By Date

Interfaces — What's the point?

To me an advantage/benefit of an interface is that it is more flexible than an abstract class. Since you can only inherit 1 abstract class but you can implement multiple interfaces, changes to a system that inherits an abstract class in many places becomes problematic. If it is inherited in 100 places, a change requires changes to all 100. But, with the interface, you can place the new change in a new interface and just use that interface where its needed (Interface Seq. from SOLID). Additionally, the memory usage seems like it would be less with the interface as an object in the interface example is used just once in memory despite how many places implement the interface.

PHP parse/syntax errors; and how to solve them

Unexpected T_LNUMBER

The token T_LNUMBER refers to a "long" / number.

Invalid variable names

In PHP, and most other programming languages, variables cannot start with a number. The first character must be alphabetic or an underscore.
```
$1   // Bad
$_1  // Good
```
- Quite often comes up for using preg_replace-placeholders "$1" in PHP context:
```
#                         ?            ?  ?
preg_replace("/#(\w+)/e",  strtopupper($1) )
```
  Where the callback should have been quoted. (Now the /e regex flag has been deprecated. But it's sometimes still misused in preg_replace_callback functions.)
- The same identifier constraint applies to object properties, btw.
```
       ?
$json->0->value
```
- While the tokenizer/parser does not allow a literal $1 as variable name, one could use ${1} or ${"1"}. Which is a syntactic workaround for non-standard identifiers. (It's best to think of it as a local scope lookup. But generally: prefer plain arrays for such cases!)
- Amusingly, but very much not recommended, PHPs parser allows Unicode-identifiers; such that $? would be valid. (Unlike a literal 1).
Stray array entry

An unexpected long can also occur for array declarations - when missing , commas:
```
#            ? ?
$xy = array(1 2 3);
```
Or likewise function calls and declarations, and other constructs:
- func(1, 2 3);
- function xy($z 2);
- for ($i=2 3<$z)
So usually there's one of ; or , missing for separating lists or expressions.
Misquoted HTML

And again, misquoted strings are a frequent source of stray numbers:
```
#                 ? ?          
echo "<td colspan="3">something bad</td>";
```
Such cases should be treated more or less like Unexpected T_STRING errors.
Other identifiers

Neither functions, classes, nor namespaces can be named beginning with a number either:
```
         ?
function 123shop() {
```
Pretty much the same as for variable names.

How to auto-reload files in Node.js?

I am working on making a rather tiny node "thing" that is able to load/unload modules at-will (so, i.e. you could be able to restart part of your application without bringing the whole app down). I am incorporating a (very stupid) dependency management, so that if you want to stop a module, all the modules that depends on that will be stopped too.

So far so good, but then I stumbled into the issue of how to reload a module. Apparently, one could just remove the module from the "require" cache and have the job done. Since I'm not keen to change directly the node source code, I came up with a very hacky-hack that is: search in the stack trace the last call to the "require" function, grab a reference to it's "cache" field and..well, delete the reference to the node:

var args = arguments while(!args['1'] || !args['1'].cache) { args = args.callee.caller.arguments } var cache = args['1'].cache util.log('remove cache ' + moduleFullpathAndExt) delete( cache[ moduleFullpathAndExt ] )

Even easier, actually:

var deleteCache = function(moduleFullpathAndExt) {
  delete( require.cache[ moduleFullpathAndExt ] )
}

Apparently, this works just fine. I have absolutely no idea of what that arguments["1"] means, but it's doing its job. I believe that the node guys will implement a reload facility someday, so I guess that for now this solution is acceptable too. (btw. my "thing" will be here: https://github.com/cheng81/wirez , go there in a couple of weeks and you should see what I'm talking about)

Getting the last element of a split string array

var title = 'fdfdsg dsgdfh dgdh dsgdh tyu hjuk yjuk uyk hjg fhjg hjj tytutdfsf sdgsdg dsfsdgvf dfgfdhdn dfgilkj,n, jhk jsu wheiu sjldsf dfdsf hfdkdjf dfhdfkd hsfd ,dsfk dfjdf ,yier djsgyi kds';
var shortText = $.trim(title).substring(1000, 150).split(" ").slice(0, -1).join(" ") + "...More >>";

Java 8 stream map on entry set

On Java 9 or later, Map.entry can be used, so long as you know that neither the key nor value will be null. If either value could legitimately be null, AbstractMap.SimpleEntry (as suggested in another answer) or AbstractMap.SimpleImmutableEntry would be the way to go.

private Map<String, AttributeType> mapConfig(Map<String, String> input, String prefix) {
   int subLength = prefix.length();
   return input.entrySet().stream().map(e -> 
      Map.entry(e.getKey().substring(subLength), AttributeType.GetByName(e.getValue())));
   }).collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue));
}

How do I use .woff fonts for my website?

After generation of woff files, you have to define font-family, which can be used later in all your css styles. Below is the code to define font families (for normal, bold, bold-italic, italic) typefaces. It is assumed, that there are 4 *.woff files (for mentioned typefaces), placed in fonts subdirectory.

In CSS code:

@font-face {
    font-family: "myfont";
    src: url("fonts/awesome-font.woff") format('woff');
}

@font-face {
    font-family: "myfont";
    src: url("fonts/awesome-font-bold.woff") format('woff');
    font-weight: bold;
}

@font-face {
    font-family: "myfont";
    src: url("fonts/awesome-font-boldoblique.woff") format('woff');
    font-weight: bold;
    font-style: italic;
}

@font-face {
    font-family: "myfont";
    src: url("fonts/awesome-font-oblique.woff") format('woff');
    font-style: italic;
}

After having that definitions, you can just write, for example,

In HTML code:

<div class="mydiv">
    <b>this will be written with awesome-font-bold.woff</b>
    <br/>
    <b><i>this will be written with awesome-font-boldoblique.woff</i></b>
    <br/>
    <i>this will be written with awesome-font-oblique.woff</i>
    <br/>
    this will be written with awesome-font.woff
</div>

In CSS code:

.mydiv {
    font-family: myfont
}

The good tool for generation woff files, which can be included in CSS stylesheets is located here. Not all woff files work correctly under latest Firefox versions, and this generator produces 'correct' fonts.

Where can I view Tomcat log files in Eclipse?

Go to the "Server" view, then double-click the Tomcat server you're running. The access log files are stored relative to the path in the "Server path" field, which itself is relative to the workspace path.

How to check if an integer is in a given range?

You could add spacing ;)

if (i > 0 && i < 100)

How to identify if a webpage is being loaded inside an iframe or directly into the browser window?

I'm not sure how this example works for older Web browsers but I use this for IE, Firefox and Chrome without an issue:

var iFrameDetection = (window === window.parent) ? false : true;

How to throw RuntimeException ("cannot find symbol")

throw new RuntimeException(msg);

unlike any other Exceptions I think RuntimeException is the only one that will not stall the program but it can still keep running and recover just print out a bunch of Exception lines? correct me if I am wrong.

What is difference between INNER join and OUTER join

Inner join matches tables on keys, but outer join matches keys just for one side. For example when you use left outer join the query brings the whole left side table and matches the right side to the left table primary key and where there is not matched places null.

How to utilize date add function in Google spreadsheet?

You can just add the number to the cell with the date.

so if A1: 12/3/2012 and A2: =A1+7 then A2 would display 12/10/2012

How to set default values for Angular 2 component properties?

That is interesting subject. You can play around with two lifecycle hooks to figure out how it works: ngOnChanges and ngOnInit.

Basically when you set default value to Input that's mean it will be used only in case there will be no value coming on that component. And the interesting part it will be changed before component will be initialized.

Let's say we have such components with two lifecycle hooks and one property coming from input.

@Component({
  selector: 'cmp',
})
export class Login implements OnChanges, OnInit {
  @Input() property: string = 'default';

  ngOnChanges(changes) {
    console.log('Changed', changes.property.currentValue, changes.property.previousValue);
  }

  ngOnInit() {
    console.log('Init', this.property);
  }

}

Situation 1

Component included in html without defined property value

As result we will see in console: Init default

That's mean onChange was not triggered. Init was triggered and property value is default as expected.

Situation 2

Component included in html with setted property <cmp [property]="'new value'"></cmp>

As result we will see in console:

Changed new value Object {}

Init new value

And this one is interesting. Firstly was triggered onChange hook, which setted property to new value, and previous value was empty object! And only after that onInit hook was triggered with new value of property.

Refer to a cell in another worksheet by referencing the current worksheet's name?

Unless you want to go the VBA route to work out the Tab name, the Excel formula is fairly ugly based upon Mid functions, etc. But both these methods can be found here if you want to go that way.

Rather, the way I would do it is:

1) Make one cell on your sheet named, for example, Reference_Sheet and put in that cell the value "Jan Item" for example.

2) Now, use the Indirect function like:

=INDIRECT(Reference_Sheet&"!J3")

3) Now, for each month's sheet, you just have to change that one Reference_Sheet cell.

Hope this gives you what you're looking for!

How to disable phone number linking in Mobile Safari?

Solution for Webview!

For PhoneGap-iPhone / PhoneGap-iOS applications, you can disable telephone number detection by adding the following to your project’s application delegate:

// ...

- (void)webViewDidStartLoad:(UIWebView *)theWebView 
{
    // disable telephone detection, basically <meta name="format-detection" content="telephone=no" />
    theWebView.dataDetectorTypes = UIDataDetectorTypeAll ^ UIDataDetectorTypePhoneNumber;

    return [ super webViewDidStartLoad:theWebView ];
}

// ...

source: Disable Telephone Detection in PhoneGap-iOS.

How to implement an STL-style iterator and avoid common pitfalls?

I was trying to solve the problem of being able to iterate over several different text arrays all of which are stored within a memory resident database that is a large struct.

The following was worked out using Visual Studio 2017 Community Edition on an MFC test application. I am including this as an example as this posting was one of several that I ran across that provided some help yet were still insufficient for my needs.

The struct containing the memory resident data looked something like the following. I have removed most of the elements for the sake of brevity and have also not included the Preprocessor defines used (the SDK in use is for C as well as C++ and is old).

What I was interested in doing is having iterators for the various WCHAR two dimensional arrays which contained text strings for mnemonics.

typedef struct  tagUNINTRAM {
    // stuff deleted ...
    WCHAR   ParaTransMnemo[MAX_TRANSM_NO][PARA_TRANSMNEMO_LEN]; /* prog #20 */
    WCHAR   ParaLeadThru[MAX_LEAD_NO][PARA_LEADTHRU_LEN];   /* prog #21 */
    WCHAR   ParaReportName[MAX_REPO_NO][PARA_REPORTNAME_LEN];   /* prog #22 */
    WCHAR   ParaSpeMnemo[MAX_SPEM_NO][PARA_SPEMNEMO_LEN];   /* prog #23 */
    WCHAR   ParaPCIF[MAX_PCIF_SIZE];            /* prog #39 */
    WCHAR   ParaAdjMnemo[MAX_ADJM_NO][PARA_ADJMNEMO_LEN];   /* prog #46 */
    WCHAR   ParaPrtModi[MAX_PRTMODI_NO][PARA_PRTMODI_LEN];  /* prog #47 */
    WCHAR   ParaMajorDEPT[MAX_MDEPT_NO][PARA_MAJORDEPT_LEN];    /* prog #48 */
    //  ... stuff deleted
} UNINIRAM;

The current approach is to use a template to define a proxy class for each of the arrays and then to have a single iterator class that can be used to iterate over a particular array by using a proxy object representing the array.

A copy of the memory resident data is stored in an object that handles reading and writing the memory resident data from/to disk. This class, CFilePara contains the templated proxy class (MnemonicIteratorDimSize and the sub class from which is it is derived, MnemonicIteratorDimSizeBase) and the iterator class, MnemonicIterator.

The created proxy object is attached to an iterator object which accesses the necessary information through an interface described by a base class from which all of the proxy classes are derived. The result is to have a single type of iterator class which can be used with several different proxy classes because the different proxy classes all expose the same interface, the interface of the proxy base class.

The first thing was to create a set of identifiers which would be provided to a class factory to generate the specific proxy object for that type of mnemonic. These identifiers are used as part of the user interface to identify the particular provisioning data the user is interested in seeing and possibly modifying.

const static DWORD_PTR dwId_TransactionMnemonic = 1;
const static DWORD_PTR dwId_ReportMnemonic = 2;
const static DWORD_PTR dwId_SpecialMnemonic = 3;
const static DWORD_PTR dwId_LeadThroughMnemonic = 4;

The Proxy Class

The templated proxy class and its base class are as follows. I needed to accommodate several different kinds of wchar_t text string arrays. The two dimensional arrays had different numbers of mnemonics, depending on the type (purpose) of the mnemonic and the different types of mnemonics were of different maximum lengths, varying between five text characters and twenty text characters. Templates for the derived proxy class was a natural fit with the template requiring the maximum number of characters in each mnemonic. After the proxy object is created, we then use the SetRange() method to specify the actual mnemonic array and its range.

// proxy object which represents a particular subsection of the
// memory resident database each of which is an array of wchar_t
// text arrays though the number of array elements may vary.
class MnemonicIteratorDimSizeBase
{
    DWORD_PTR  m_Type;

public:
    MnemonicIteratorDimSizeBase(DWORD_PTR x) { }
    virtual ~MnemonicIteratorDimSizeBase() { }

    virtual wchar_t *begin() = 0;
    virtual wchar_t *end() = 0;
    virtual wchar_t *get(int i) = 0;
    virtual int ItemSize() = 0;
    virtual int ItemCount() = 0;

    virtual DWORD_PTR ItemType() { return m_Type; }
};

template <size_t sDimSize>
class MnemonicIteratorDimSize : public MnemonicIteratorDimSizeBase
{
    wchar_t    (*m_begin)[sDimSize];
    wchar_t    (*m_end)[sDimSize];

public:
    MnemonicIteratorDimSize(DWORD_PTR x) : MnemonicIteratorDimSizeBase(x), m_begin(0), m_end(0) { }
    virtual ~MnemonicIteratorDimSize() { }

    virtual wchar_t *begin() { return m_begin[0]; }
    virtual wchar_t *end() { return m_end[0]; }
    virtual wchar_t *get(int i) { return m_begin[i]; }

    virtual int ItemSize() { return sDimSize; }
    virtual int ItemCount() { return m_end - m_begin; }

    void SetRange(wchar_t (*begin)[sDimSize], wchar_t (*end)[sDimSize]) {
        m_begin = begin; m_end = end;
    }

};

The Iterator Class

The iterator class itself is as follows. This class provides just basic forward iterator functionality which is all that is needed at this time. However I expect that this will change or be extended when I need something additional from it.

class MnemonicIterator
{
private:
    MnemonicIteratorDimSizeBase   *m_p;  // we do not own this pointer. we just use it to access current item.
    int      m_index;                    // zero based index of item.
    wchar_t  *m_item;                    // value to be returned.

public:
    MnemonicIterator(MnemonicIteratorDimSizeBase *p) : m_p(p) { }
    ~MnemonicIterator() { }

    // a ranged for needs begin() and end() to determine the range.
    // the range is up to but not including what end() returns.
    MnemonicIterator & begin() { m_item = m_p->get(m_index = 0); return *this; }                 // begining of range of values for ranged for. first item
    MnemonicIterator & end() { m_item = m_p->get(m_index = m_p->ItemCount()); return *this; }    // end of range of values for ranged for. item after last item.
    MnemonicIterator & operator ++ () { m_item = m_p->get(++m_index); return *this; }            // prefix increment, ++p
    MnemonicIterator & operator ++ (int i) { m_item = m_p->get(m_index++); return *this; }       // postfix increment, p++
    bool operator != (MnemonicIterator &p) { return **this != *p; }                              // minimum logical operator is not equal to
    wchar_t * operator *() const { return m_item; }                                              // dereference iterator to get what is pointed to
};

The proxy object factory determines which object to created based on the mnemonic identifier. The proxy object is created and the pointer returned is the standard base class type so as to have a uniform interface regardless of which of the different mnemonic sections are being accessed. The SetRange() method is used to specify to the proxy object the specific array elements the proxy represents and the range of the array elements.

CFilePara::MnemonicIteratorDimSizeBase * CFilePara::MakeIterator(DWORD_PTR x)
{
    CFilePara::MnemonicIteratorDimSizeBase  *mi = nullptr;

    switch (x) {
    case dwId_TransactionMnemonic:
        {
            CFilePara::MnemonicIteratorDimSize<PARA_TRANSMNEMO_LEN> *mk = new CFilePara::MnemonicIteratorDimSize<PARA_TRANSMNEMO_LEN>(x);
            mk->SetRange(&m_Para.ParaTransMnemo[0], &m_Para.ParaTransMnemo[MAX_TRANSM_NO]);
            mi = mk;
        }
        break;
    case dwId_ReportMnemonic:
        {
            CFilePara::MnemonicIteratorDimSize<PARA_REPORTNAME_LEN> *mk = new CFilePara::MnemonicIteratorDimSize<PARA_REPORTNAME_LEN>(x);
            mk->SetRange(&m_Para.ParaReportName[0], &m_Para.ParaReportName[MAX_REPO_NO]);
            mi = mk;
        }
        break;
    case dwId_SpecialMnemonic:
        {
            CFilePara::MnemonicIteratorDimSize<PARA_SPEMNEMO_LEN> *mk = new CFilePara::MnemonicIteratorDimSize<PARA_SPEMNEMO_LEN>(x);
            mk->SetRange(&m_Para.ParaSpeMnemo[0], &m_Para.ParaSpeMnemo[MAX_SPEM_NO]);
            mi = mk;
        }
        break;
    case dwId_LeadThroughMnemonic:
        {
            CFilePara::MnemonicIteratorDimSize<PARA_LEADTHRU_LEN> *mk = new CFilePara::MnemonicIteratorDimSize<PARA_LEADTHRU_LEN>(x);
            mk->SetRange(&m_Para.ParaLeadThru[0], &m_Para.ParaLeadThru[MAX_LEAD_NO]);
            mi = mk;
        }
        break;
    }

    return mi;
}

Using the Proxy Class and Iterator

The proxy class and its iterator are used as shown in the following loop to fill in a CListCtrl object with a list of mnemonics. I am using std::unique_ptr so that when the proxy class i not longer needed and the std::unique_ptr goes out of scope, the memory will be cleaned up.

What this source code does is to create a proxy object for the array within the struct which corresponds to the specified mnemonic identifier. It then creates an iterator for that object, uses a ranged for to fill in the CListCtrl control and then cleans up. These are all raw wchar_t text strings which may be exactly the number of array elements so we copy the string into a temporary buffer in order to ensure that the text is zero terminated.

    std::unique_ptr<CFilePara::MnemonicIteratorDimSizeBase> pObj(pFile->MakeIterator(m_IteratorType));
    CFilePara::MnemonicIterator pIter(pObj.get());  // provide the raw pointer to the iterator who doesn't own it.

    int i = 0;    // CListCtrl index for zero based position to insert mnemonic.
    for (auto x : pIter)
    {
        WCHAR szText[32] = { 0 };     // Temporary buffer.

        wcsncpy_s(szText, 32, x, pObj->ItemSize());
        m_mnemonicList.InsertItem(i, szText);  i++;
    }

MVC Razor Hidden input and passing values

First of all ASP.NET MVC does not work the same way WebForms does. You don't have the whole runat="server" thing. MVC does not offer the abstraction layer that WebForms offered. Probabaly you should try to understand what controllers and actions are and then you should look at model binding. Any beginner level tutorial about MVC shows how you can pass data between the client and the server.

MVC which submit button has been pressed

Name both your submit buttons the same

<input name="submit" type="submit" id="submit" value="Save" />
<input name="submit" type="submit" id="process" value="Process" />

Then in your controller get the value of submit. Only the button clicked will pass its value.

public ActionResult Index(string submit)
{
    Response.Write(submit);
    return View();
}

You can of course assess that value to perform different operations with a switch block.

public ActionResult Index(string submit)
{
    switch (submit)
    {
        case "Save":
            // Do something
            break;
        case "Process":
            // Do something
            break;
        default:
            throw new Exception();
            break;
    }

    return View();
}

Switch statement for string matching in JavaScript

Might be too late and all, but I liked this in case assignment :)

function extractParameters(args) {
    function getCase(arg, key) {
        return arg.match(new RegExp(`${key}=(.*)`)) || {};
    }

    args.forEach((arg) => {
        console.log("arg: " + arg);
        let match;
        switch (arg) {
            case (match = getCase(arg, "--user")).input:
            case (match = getCase(arg, "-u")).input:
                userName = match[1];
                break;

            case (match = getCase(arg, "--password")).input:
            case (match = getCase(arg, "-p")).input:
                password = match[1];
                break;

            case (match = getCase(arg, "--branch")).input:
            case (match = getCase(arg, "-b")).input:
                branch = match[1];
                break;
        }
    });
};

you could event take it further, and pass a list of option and handle the regex with |

Laravel is there a way to add values to a request array

You can access directly the request array with $request['key'] = 'value';

Laravel 4: how to "order by" using Eloquent ORM

This is how I would go about it.

$posts = $this->post->orderBy('id', 'DESC')->get();

Node.js - use of module.exports as a constructor

The example code is:

in main

square(width,function (data)
{
   console.log(data.squareVal);
});

using the following may works

exports.square = function(width,callback)
{
     var aa = new Object();
     callback(aa.squareVal = width * width);    
}

Replace non-numeric with empty string

Here's the extension method way of doing it.

public static class Extensions
{
    public static string ToDigitsOnly(this string input)
    {
        Regex digitsOnly = new Regex(@"[^\d]");
        return digitsOnly.Replace(input, "");
    }
}

I want to exception handle 'list index out of range.'

For anyone interested in a shorter way:

gotdata = len(dlist)>1 and dlist[1] or 'null'

But for best performance, I suggest using False instead of 'null', then a one line test will suffice:

gotdata = len(dlist)>1 and dlist[1]

Setting timezone in Python

>>> import os, time
>>> time.strftime('%X %x %Z')
'12:45:20 08/19/09 CDT'
>>> os.environ['TZ'] = 'Europe/London'
>>> time.tzset()
>>> time.strftime('%X %x %Z')
'18:45:39 08/19/09 BST'

To get the specific values you've listed:

>>> year = time.strftime('%Y')
>>> month = time.strftime('%m')
>>> day = time.strftime('%d')
>>> hour = time.strftime('%H')
>>> minute = time.strftime('%M')

See here for a complete list of directives. Keep in mind that the strftime() function will always return a string, not an integer or other type.

'Incorrect SET Options' Error When Building Database Project

According to BOL:

Indexed views and indexes on computed columns store results in the database for later reference. The stored results are valid only if all connections referring to the indexed view or indexed computed column can generate the same result set as the connection that created the index.

In order to create a table with a persisted, computed column, the following connection settings must be enabled:

SET ANSI_NULLS ON
SET ANSI_PADDING ON
SET ANSI_WARNINGS ON
SET ARITHABORT ON
SET CONCAT_NULL_YIELDS_NULL ON
SET NUMERIC_ROUNDABORT ON
SET QUOTED_IDENTIFIER ON

These values are set on the database level and can be viewed using:

SELECT 
    is_ansi_nulls_on,
    is_ansi_padding_on,
    is_ansi_warnings_on,
    is_arithabort_on,
    is_concat_null_yields_null_on,
    is_numeric_roundabort_on,
    is_quoted_identifier_on
FROM sys.databases

However, the SET options can also be set by the client application connecting to SQL Server.

A perfect example is SQL Server Management Studio which has the default values for SET ANSI_NULLS and SET QUOTED_IDENTIFIER both to ON. This is one of the reasons why I could not initially duplicate the error you posted.

Anyway, to duplicate the error, try this (this will override the SSMS default settings):

SET ANSI_NULLS ON
SET ANSI_PADDING OFF
SET ANSI_WARNINGS OFF
SET ARITHABORT OFF
SET CONCAT_NULL_YIELDS_NULL ON 
SET NUMERIC_ROUNDABORT OFF
SET QUOTED_IDENTIFIER ON
GO

CREATE TABLE T1 (
    ID INT NOT NULL,
    TypeVal AS ((1)) PERSISTED NOT NULL
)

You can fix the test case above by using:

SET ANSI_PADDING ON
SET ANSI_WARNINGS ON

I would recommend tweaking these two settings in your script before the creation of the table and related indexes.

Creating an instance of class

Allocates some dynamic memory from the free store, and creates an object in that memory using its default constructor. You never delete it, so the memory is leaked.
Does exactly the same as 1; in the case of user-defined types, the parentheses are optional.
Allocates some automatic memory, and creates an object in that memory using its default constructor. The memory is released automatically when the object goes out of scope.
Similar to 3. Notionally, the named object foo4 is initialised by default-constructing, copying and destroying a temporary object; usually, this is elided giving the same result as 3.
Allocates a dynamic object, then initialises a second by copying the first. Both objects are leaked; and there's no way to delete the first since you don't keep a pointer to it.
Does exactly the same as 5.
Does not compile. Foo foo5 is a declaration, not an expression; function (and constructor) arguments must be expressions.
Creates a temporary object, and initialises a dynamic object by copying it. Only the dynamic object is leaked; the temporary is destroyed automatically at the end of the full expression. Note that you can create the temporary with just Foo() rather than the equivalent Foo::Foo() (or indeed Foo::Foo::Foo::Foo::Foo())

When do I use each?

Don't, unless you like unnecessary decorations on your code.
When you want to create an object that outlives the current scope. Remember to delete it when you've finished with it, and learn how to use smart pointers to control the lifetime more conveniently.
When you want an object that only exists in the current scope.
Don't, unless you think 3 looks boring and what to add some unnecessary decoration.
Don't, because it leaks memory with no chance of recovery.
Don't, because it leaks memory with no chance of recovery.
Don't, because it won't compile
When you want to create a dynamic Bar from a temporary Foo.

You don't have write permissions for the /Library/Ruby/Gems/2.3.0 directory. (mac user)

If you have installed ruby separately and installed ruby using rbenv/rvm you budler might point to different versions.

try

gem env home

and

ruby -v

both should point to same version.check you have installed ruby using rbenv/rvm, If so delete the ruby version you installed separately.

In order for gem to work, you must invoke rbenv,

rbenv shell <ruby version>

and

rbenv global <ruby version>

I am not sure how RVM works. Let me know if this works.

Add class to <html> with Javascript?

document.documentElement.classList.add('myCssClass');

classList is supported since ie10: https://caniuse.com/#search=classlist

HTTP Error 500.30 - ANCM In-Process Start Failure

This publish profile setting fixed for me:

Configure Publish Profile -> Settings -> Site Extensions Options ->

[x] Install ASP.NET Core Site Extension.

How to pass a parameter to routerLink that is somewhere inside the URL?

In your particular example you'd do the following routerLink:

[routerLink]="['user', user.id, 'details']"

To do so in a controller, you can inject Router and use:

router.navigate(['user', user.id, 'details']);

More info in the Angular docs Link Parameters Array section of Routing & Navigation

Target WSGI script cannot be loaded as Python module

I was getting this error. I'm using python 3 in a virtual environment found this in my apache logs

[Fri Dec 21 08:01:43.471561 2018] [mpm_prefork:notice] [pid 21786] AH00163: Apache/2.4.6 (Red Hat Enterprise Linux) mod_wsgi/3.4 Python/2.7.5 configured -- resuming normal operations

I had installed wsgi using yum -y install mod_wsgi. This had installed mod_wsgi compiled for python 2. So I uninstalled it

yum remove mod_wsgi

and installed mod_wsgi compiled for python 3 using

yum install python35u-mod_wsgi

It worked after that

Excel VBA If cell.Value =... then

You can determine if as certain word is found in a cell by using

If InStr(cell.Value, "Word1") > 0 Then

If Word1 is found in the string the InStr() function will return the location of the first character of Word1 in the string.

SQL comment header examples

-------------------------------------------------------------------------------
-- Author       name
-- Created      date
-- Purpose      description of the business/technical purpose
--              using multiple lines as needed
-- Copyright © yyyy, Company Name, All Rights Reserved
-------------------------------------------------------------------------------
-- Modification History
--
-- 01/01/0000  developer full name  
--      A comprehensive description of the changes. The description may use as 
--      many lines as needed.
-------------------------------------------------------------------------------

HttpServletRequest - Get query string parameters, no form data

The servlet API lacks this feature because it was created in a time when many believed that the query string and the message body was just two different ways of sending parameters, not realizing that the purposes of the parameters are fundamentally different.

The query string parameters ?foo=bar are a part of the URL because they are involved in identifying a resource (which could be a collection of many resources), like "all persons aged 42":

GET /persons?age=42

The message body parameters in POST or PUT are there to express a modification to the target resource(s). Fx setting a value to the attribute "hair":

PUT /persons?age=42

hair=grey

So it is definitely RESTful to use both query parameters and body parameters at the same time, separated so that you can use them for different purposes. The feature is definitely missing in the Java servlet API.

Convert bytes to a string

def toString(string):    
    try:
        return v.decode("utf-8")
    except ValueError:
        return string

b = b'97.080.500'
s = '97.080.500'
print(toString(b))
print(toString(s))

Fixing slow initial load for IIS

Options A, B and D seem to be in the same category since they only influence the initial start time, they do warmup of the website like compilation and loading of libraries in memory.

Using C, setting the idle timeout, should be enough so that subsequent requests to the server are served fast (restarting the app pool takes quite some time - in the order of seconds).

As far as I know, the timeout exists to save memory that other websites running in parallel on that machine might need. The price being that one time slow load time.

Besides the fact that the app pool gets shutdown in case of user inactivity, the app pool will also recycle by default every 1740 minutes (29 hours).

From technet:

Internet Information Services (IIS) application pools can be periodically recycled to avoid unstable states that can lead to application crashes, hangs, or memory leaks.

As long as app pool recycling is left on, it should be enough. But if you really want top notch performance for most components, you should also use something like the Application Initialization Module you mentioned.

WARNING: Exception encountered during context initialization - cancelling refresh attempt

To closed ideas,
To remove all folder and file C:/Users/UserName/.m2/org/*,
Open ideas and update Maven project,(right click on project -> maven->update maven project)
After that update the project.

rails generate model

You need to create new rails application first. Run

rails new mebay
cd mebay
bundle install
rails generate model ...

And try to find Rails 3 tutorial, there are a lot of changes since 2.1 Guides (http://guides.rubyonrails.org/getting_started.html) are good start point.

sql query distinct with Row_Number

Use this:

SELECT *, ROW_NUMBER() OVER (ORDER BY id) AS RowNum FROM
    (SELECT DISTINCT id FROM table WHERE fid = 64) Base

and put the "output" of a query as the "input" of another.

Using CTE:

; WITH Base AS (
    SELECT DISTINCT id FROM table WHERE fid = 64
)

SELECT *, ROW_NUMBER() OVER (ORDER BY id) AS RowNum FROM Base

The two queries should be equivalent.

Technically you could

SELECT DISTINCT id, ROW_NUMBER() OVER (PARTITION BY id ORDER BY id) AS RowNum 
    FROM table
    WHERE fid = 64

but if you increase the number of DISTINCT fields, you have to put all these fields in the PARTITION BY, so for example

SELECT DISTINCT id, description,
    ROW_NUMBER() OVER (PARTITION BY id, description ORDER BY id) AS RowNum 
    FROM table
    WHERE fid = 64

I even hope you comprehend that you are going against standard naming conventions here, id should probably be a primary key, so unique by definition, so a DISTINCT would be useless on it, unless you coupled the query with some JOINs/UNION ALL...

Best approach to remove time part of datetime in SQL Server

For me the code below is always a winner:

SELECT CONVERT(DATETIME, FLOOR(CONVERT(FLOAT,GETDATE())));

How to download a Nuget package without nuget.exe or Visual Studio extension?

Either make an account on the Nuget.org website, then log in, browse to the package you want and click on the Download link on the left menu.

Or guess the URL. They have the following format:

https://www.nuget.org/api/v2/package/{packageID}/{packageVersion}

Then simply unzip the .nupkg file and extract the contents you need.

Processing $http response in service

I really don't like the fact that, because of the "promise" way of doing things, the consumer of the service that uses $http has to "know" about how to unpack the response.

I just want to call something and get the data out, similar to the old $scope.items = Data.getData(); way, which is now deprecated.

I tried for a while and didn't come up with a perfect solution, but here's my best shot (Plunker). It may be useful to someone.

app.factory('myService', function($http) {
  var _data;  // cache data rather than promise
  var myService = {};

  myService.getData = function(obj) { 
    if(!_data) {
      $http.get('test.json').then(function(result){
        _data = result.data;
        console.log(_data);  // prove that it executes once
        angular.extend(obj, _data);
      }); 
    } else {  
      angular.extend(obj, _data);
    }
  };

  return myService;
});

Then controller:

app.controller('MainCtrl', function( myService,$scope) {
  $scope.clearData = function() {
    $scope.data = Object.create(null);
  };
  $scope.getData = function() {
    $scope.clearData();  // also important: need to prepare input to getData as an object
    myService.getData($scope.data); // **important bit** pass in object you want to augment
  };
});

Flaws I can already spot are

You have to pass in the object which you want the data added to, which isn't an intuitive or common pattern in Angular
getData can only accept the obj parameter in the form of an object (although it could also accept an array), which won't be a problem for many applications, but it's a sore limitation
You have to prepare the input object $scope.data with = {} to make it an object (essentially what $scope.clearData() does above), or = [] for an array, or it won't work (we're already having to assume something about what data is coming). I tried to do this preparation step IN getData, but no luck.

Nevertheless, it provides a pattern which removes controller "promise unwrap" boilerplate, and might be useful in cases when you want to use certain data obtained from $http in more than one place while keeping it DRY.

Automating the InvokeRequired code pattern

You could write an extension method:

public static void InvokeIfRequired(this Control c, Action<Control> action)
{
    if(c.InvokeRequired)
    {
        c.Invoke(new Action(() => action(c)));
    }
    else
    {
        action(c);
    }
}

And use it like this:

object1.InvokeIfRequired(c => { c.Visible = true; });

EDIT: As Simpzon points out in the comments you could also change the signature to:

public static void InvokeIfRequired<T>(this T c, Action<T> action) 
    where T : Control

Visual Studio 2017 - Could not load file or assembly 'System.Runtime, Version=4.1.0.0' or one of its dependencies

I resolved that error by referencing the NetStandard.Library and the following app.config File in the NUnit-Project.

<?xml version="1.0" encoding="utf-8"?>
<configuration>
<runtime>
    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
        <dependentAssembly>
            <assemblyIdentity name="System.Runtime" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
            <bindingRedirect oldVersion="0.0.0.0-4.1.1.0" newVersion="4.1.1.0" />
        </dependentAssembly>
        <dependentAssembly>
            <assemblyIdentity name="System.Reflection" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
            <bindingRedirect oldVersion="0.0.0.0-4.1.1.0" newVersion="4.1.1.0" />
        </dependentAssembly>
        <dependentAssembly>
            <assemblyIdentity name="System.Runtime.InteropServices" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
            <bindingRedirect oldVersion="0.0.0.0-4.1.0.0" newVersion="4.1.1.0" />
        </dependentAssembly>
    </assemblyBinding>
</runtime>

Edit

If anything other than System.Runtime, System.Reflection or System.Runtime.InteropServices is missing (e.g. System.Linq), then just add a new dependentAssembly node.

Edit 2

In new Visual Studio Versions (2017 15.8 I think) it's possible that Studio creates the app.config File. Just check the Auto-generate binding redirects Checkbox in Project-Properties - Application.

Edit 3

Auto-generate binding redirects does not work well with .NET Classlibraries. Adding the following lines to the csproj files solves this and a working .config file for the Classlibary will be generated.

<PropertyGroup>
  <AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
  <GenerateBindingRedirectsOutputType>true</GenerateBindingRedirectsOutputType>
</PropertyGroup>

How do I remove time part from JavaScript date?

Parse that string into a Date object:

var myDate = new Date('10/11/1955 10:40:50 AM');

Then use the usual methods to get the date's day of month (getDate) / month (getMonth) / year (getFullYear).

var noTime = new Date(myDate.getFullYear(), myDate.getMonth(), myDate.getDate());

Unable to resolve host "<insert URL here>" No address associated with hostname

I had the same issue with the Android 10 emulator and I was able to solve the problem by following the steps below:

Go to Settings ? Network & internet ? Advanced ? Private DNS
Select Private DNS provider hostname
Enter: dns.google
Click Save

With this setup, you URL should work as expected.

Spring Boot @Value Properties

I had the similar issue and the above examples doesn't help me to read properties. I have posted the complete class which will help you to read properties values from application.properties file in SpringBoot application in the below link.

Spring Boot - Environment @Autowired throws NullPointerException

Downloading and unzipping a .zip file without writing to disk

My suggestion would be to use a StringIO object. They emulate files, but reside in memory. So you could do something like this:

# get_zip_data() gets a zip archive containing 'foo.txt', reading 'hey, foo'

import zipfile
from StringIO import StringIO

zipdata = StringIO()
zipdata.write(get_zip_data())
myzipfile = zipfile.ZipFile(zipdata)
foofile = myzipfile.open('foo.txt')
print foofile.read()

# output: "hey, foo"

Or more simply (apologies to Vishal):

myzipfile = zipfile.ZipFile(StringIO(get_zip_data()))
for name in myzipfile.namelist():
    [ ... ]

In Python 3 use BytesIO instead of StringIO:

import zipfile
from io import BytesIO

filebytes = BytesIO(get_zip_data())
myzipfile = zipfile.ZipFile(filebytes)
for name in myzipfile.namelist():
    [ ... ]

What is the easiest way to install BLAS and LAPACK for scipy?

For Debian Jessie and Stretch installing the following packages resolves the issue:

sudo apt install libblas3 liblapack3 liblapack-dev libblas-dev

Your next issue is very likely going to be a missing Fortran compiler, resolve this by installing it like this:

sudo apt install gfortran

If you want an optimized scipy, you can also install the optional libatlas-base-dev package:

sudo apt install libatlas-base-dev

Source

If you have any issue with a missing Python.h file like this:

Python.h: No such file or directory

Then have a look at this post: https://stackoverflow.com/a/21530768/209532

how to put image in center of html page?

Put your image in a container div then use the following CSS (changing the dimensions to suit your image.

.imageContainer{
        position: absolute;
        width: 100px; /*the image width*/
        height: 100px; /*the image height*/
        left: 50%;
        top: 50%;
        margin-left: -50px; /*half the image width*/
        margin-top: -50px; /*half the image height*/
    }

Intercept a form submit in JavaScript and prevent normal submission

<form onSubmit="return captureForm()"> that should do. Make sure that your captureForm() method returns false.

how to remove key+value from hash in javascript

Why do you use new Array(); for hash? You need to use new Object() instead.

And i think you will get what you want.

How to determine whether a Pandas Column contains a particular value

Or use Series.tolist or Series.any:

>>> s = pd.Series(list('abc'))
>>> s
0    a
1    b
2    c
dtype: object
>>> 'a' in s.tolist()
True
>>> (s=='a').any()
True

Series.tolist makes a list about of a Series, and the other one i am just getting a boolean Series from a regular Series, then checking if there are any Trues in the boolean Series.

Enable CORS in fetch api

Browser have cross domain security at client side which verify that server allowed to fetch data from your domain. If Access-Control-Allow-Origin not available in response header, browser disallow to use response in your JavaScript code and throw exception at network level. You need to configure cors at your server side.

You can fetch request using mode: 'cors'. In this situation browser will not throw execption for cross domain, but browser will not give response in your javascript function.

So in both condition you need to configure cors in your server or you need to use custom proxy server.

Reset identity seed after deleting records in SQL Server

DBCC CHECKIDENT ('TestTable', RESEED, 0)
GO

Where 0 is identity Start value

How to create windows service from java jar?

Another option is winsw: https://github.com/kohsuke/winsw/

Configure an xml file to specify the service name, what to execute, any arguments etc. And use the exe to install. Example xml: https://github.com/kohsuke/winsw/tree/master/examples

I prefer this to nssm, because it is one lightweight exe; and the config xml is easy to share/commit to source code.

PS the service is installed by running your-service.exe install

Refresh/reload the content in Div using jquery/ajax

Try this

html code

 <div id="refresh">
    <input type="text" />
    <input type="button" id="click" />
 </div>

jQuery code

 <script>
    $('#click').click(function(){
    var div=$('#refresh').html();
    $.ajax({
        url: '/path/to/file.php',
        type: 'POST',
        dataType: 'json',
        data: {param1: 'value1'},
    })
    .done(function(data) {
if(data.success=='ok'){
        $('#refresh').html(div);
}else{
// show errors.
}
    })
    .fail(function() {
        console.log("error");
    })
    .always(function() {
        console.log("complete");
    });
    });

</script>

php page code path=/path/to/file.php

<?php
   header('Content-Type: application/json');
   $done=true;
   if($done){
       echo json_encode(['success'=>'ok']);
   }
?>

Why isn't textarea an input[type="textarea"]?

I realize this is an older post, but thought this might be helpful to anyone wondering the same question:

While the previous answers are no doubt valid, there is a more simple reason for the distinction between textarea and input.

As mentioned previously, HTML is used to describe and give as much semantic structure to web content as possible, including input forms. A textarea may be used for input, however a textarea can also be marked as read only via the readonly attribute. The existence of such an attribute would not make any sense for an input type, and thus the distinction.

HTTP headers in Websockets client API

Updated 2x

Short answer: No, only the path and protocol field can be specified.

Longer answer:

There is no method in the JavaScript WebSockets API for specifying additional headers for the client/browser to send. The HTTP path ("GET /xyz") and protocol header ("Sec-WebSocket-Protocol") can be specified in the WebSocket constructor.

The Sec-WebSocket-Protocol header (which is sometimes extended to be used in websocket specific authentication) is generated from the optional second argument to the WebSocket constructor:

var ws = new WebSocket("ws://example.com/path", "protocol");
var ws = new WebSocket("ws://example.com/path", ["protocol1", "protocol2"]);

The above results in the following headers:

Sec-WebSocket-Protocol: protocol

and

Sec-WebSocket-Protocol: protocol1, protocol2

A common pattern for achieving WebSocket authentication/authorization is to implement a ticketing system where the page hosting the WebSocket client requests a ticket from the server and then passes this ticket during WebSocket connection setup either in the URL/query string, in the protocol field, or required as the first message after the connection is established. The server then only allows the connection to continue if the ticket is valid (exists, has not been already used, client IP encoded in ticket matches, timestamp in ticket is recent, etc). Here is a summary of WebSocket security information: https://devcenter.heroku.com/articles/websocket-security

Basic authentication was formerly an option but this has been deprecated and modern browsers don't send the header even if it is specified.

Basic Auth Info (Deprecated - No longer functional):

NOTE: the following information is no longer accurate in any modern browsers.

The Authorization header is generated from the username and password (or just username) field of the WebSocket URI:

var ws = new WebSocket("ws://username:[email protected]")

The above results in the following header with the string "username:password" base64 encoded:

Authorization: Basic dXNlcm5hbWU6cGFzc3dvcmQ=

I have tested basic auth in Chrome 55 and Firefox 50 and verified that the basic auth info is indeed negotiated with the server (this may not work in Safari).

Thanks to Dmitry Frank's for the basic auth answer

How to provide a mysql database connection in single file in nodejs

try this

var express = require('express');

var mysql     =    require('mysql');

var path = require('path');
var favicon = require('serve-favicon');
var logger = require('morgan');
var cookieParser = require('cookie-parser');
var bodyParser = require('body-parser');

var routes = require('./routes/index');
var users = require('./routes/users');

var app = express();

// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'jade');

// uncomment after placing your favicon in /public
//app.use(favicon(path.join(__dirname, 'public', 'favicon.ico')));
app.use(logger('dev'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));

app.use('/', routes);
app.use('/users', users);

// catch 404 and forward to error handler
app.use(function(req, res, next) {
  var err = new Error('Not Found');
  err.status = 404;
  next(err);
});

// error handlers

// development error handler
// will print stacktrace
console.log(app);
if (app.get('env') === 'development') {
  app.use(function(err, req, res, next) {
    res.status(err.status || 500);
    res.render('error', {
      message: err.message,
      error: err
    });
  });
}

// production error handler
// no stacktraces leaked to user
app.use(function(err, req, res, next) {
  res.status(err.status || 500);
  res.render('error', {
    message: err.message,
    error: {}
  });
});

var con = mysql.createConnection({
  host: "localhost",
  user: "root",
  password: "admin123",
  database: "sitepoint"
});

con.connect(function(err){
  if(err){
    console.log('Error connecting to Db');
    return;
  }
  console.log('Connection established');
});



module.exports = app;

How do I create documentation with Pydoc?

pydoc is fantastic for generating documentation, but the documentation has to be written in the first place. You must have docstrings in your source code as was mentioned by RocketDonkey in the comments:

"""
This example module shows various types of documentation available for use
with pydoc.  To generate HTML documentation for this module issue the
command:

    pydoc -w foo

"""

class Foo(object):
    """
    Foo encapsulates a name and an age.
    """
    def __init__(self, name, age):
        """
        Construct a new 'Foo' object.

        :param name: The name of foo
        :param age: The ageof foo
        :return: returns nothing
        """
        self.name = name
        self.age = age

def bar(baz):
    """
    Prints baz to the display.
    """
    print baz

if __name__ == '__main__':
    f = Foo('John Doe', 42)
    bar("hello world")

The first docstring provides instructions for creating the documentation with pydoc. There are examples of different types of docstrings so you can see how they look when generated with pydoc.

Ansible: How to delete files and folders inside a directory?

I really didn't like the rm solution, also ansible gives you warnings about using rm. So here is how to do it without the need of rm and without ansible warnings.

- hosts: all
  tasks:
  - name: Ansible delete file glob
    find:
      paths: /etc/Ansible
      patterns: "*.txt"
    register: files_to_delete

  - name: Ansible remove file glob
    file:
      path: "{{ item.path }}"
      state: absent
    with_items: "{{ files_to_delete.files }}"

source: http://www.mydailytutorials.com/ansible-delete-multiple-files-directories-ansible/

pandas how to check dtype for all columns in a dataframe?

Suppose df is a pandas DataFrame then to get number of non-null values and data types of all column at once use:

df.info()

FirebaseInstanceIdService is deprecated

In KOTLIN:- If you want to save Token into DB or shared preferences then override onNewToken in FirebaseMessagingService

override fun onNewToken(token: String) {
        super.onNewToken(token)
    }

Get token at run-time,use

FirebaseInstanceId.getInstance().instanceId
                        .addOnSuccessListener(this@SplashActivity) { instanceIdResult ->
                            val mToken = instanceIdResult.token
                            println("printing  fcm token: $mToken")
                        }

Send response to all clients except sender

For namespaces within rooms looping the list of clients in a room (similar to Nav's answer) is one of only two approaches I've found that will work. The other is to use exclude. E.G.

socket.on('message',function(data) {
    io.of( 'namespace' ).in( data.roomID ).except( socket.id ).emit('message',data);
}

How to delete duplicate lines in a file without sorting it in Unix?

awk '!seen[$0]++' file.txt

seen is an associative-array that Awk will pass every line of the file to. If a line isn't in the array then seen[$0] will evaluate to false. The ! is the logical NOT operator and will invert the false to true. Awk will print the lines where the expression evaluates to true. The ++ increments seen so that seen[$0] == 1 after the first time a line is found and then seen[$0] == 2, and so on.
Awk evaluates everything but 0 and "" (empty string) to true. If a duplicate line is placed in seen then !seen[$0] will evaluate to false and the line will not be written to the output.

How do I implement a callback in PHP?

well... with 5.3 on the horizon, all will be better, because with 5.3, we'll get closures and with them anonymous functions

http://wiki.php.net/rfc/closures

How can I remove punctuation from input text in Java?

You can use following regular expression construct

Punctuation: One of !"#$%&'()*+,-./:;<=>?@[]^_`{|}~

inputString.replaceAll("\\p{Punct}", "");

.setAttribute("disabled", false); changes editable attribute to false

Try doing this instead:

function enable(id)
{
    var eleman = document.getElementById(id);
    eleman.removeAttribute("disabled");        
}

To enable an element you have to remove the disabled attribute. Setting it to false still means it is disabled.

http://jsfiddle.net/SRK2c/

How do MySQL indexes work?

Basically an index is a map of all your keys that is sorted in order. With a list in order, then instead of checking every key, it can do something like this:

1: Go to middle of list - is higher or lower than what I'm looking for?

2: If higher, go to halfway point between middle and bottom, if lower, middle and top

3: Is higher or lower? Jump to middle point again, etc.

Using that logic, you can find an element in a sorted list in about 7 steps, instead of checking every item.

Obviously there are complexities, but that gives you the basic idea.

Best data type to store money values in MySQL

Try using

Decimal(19,4)

this usually works with every other DB as well

How can I find script's directory?

I use:

import os
import sys

def get_script_path():
    return os.path.dirname(os.path.realpath(sys.argv[0]))

As aiham points out in a comment, you can define this function in a module and use it in different scripts.

C/C++ NaN constant (literal)?

This can be done using the numeric_limits in C++:

http://www.cplusplus.com/reference/limits/numeric_limits/

These are the methods you probably want to look at:

infinity()  T   Representation of positive infinity, if available.
quiet_NaN() T   Representation of quiet (non-signaling) "Not-a-Number", if available.
signaling_NaN() T   Representation of signaling "Not-a-Number", if available.

Jenkins / Hudson environment variables

The information on this answer is out of date. You need to go to Configure Jenkins > And you can then click to add an Environment Variable key-value pair from there.

eg: export MYVAR=test would be MYVAR is the key, and test is the value.

How many times a substring occurs

Depending what you really mean, I propose the following solutions:

You mean a list of space separated sub-strings and want to know what is the sub-string position number among all sub-strings:
```
s = 'sub1 sub2 sub3'
s.split().index('sub2')
>>> 1
```
You mean the char-position of the sub-string in the string:
```
s.find('sub2')
>>> 5
```
You mean the (non-overlapping) counts of appearance of a su-bstring:
```
s.count('sub2')
>>> 1
s.count('sub')
>>> 3
```

Connecting PostgreSQL 9.2.1 with Hibernate

This is the hibernate.cfg.xml file to connect postgresql 9.5 and this is help to you basic configuration.

 <?xml version='1.0' encoding='utf-8'?>

<!--
  ~ Hibernate, Relational Persistence for Idiomatic Java
  ~
  ~ License: GNU Lesser General Public License (LGPL), version 2.1 or later.
  ~ See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
  -->
<!DOCTYPE hibernate-configuration SYSTEM
        "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<hibernate-configuration
>
    <session-factory>
        <!-- Database connection settings -->
        <property name="connection.driver_class">org.postgresql.Driver</property>
        <property name="connection.url">jdbc:postgresql://localhost:5433/hibernatedb</property>
        <property name="connection.username">postgres</property>
        <property name="connection.password">password</property>

        <!-- JDBC connection pool (use the built-in) -->
        <property name="connection.pool_size">1</property>

        <!-- SQL dialect -->
        <property name="hibernate.dialect">org.hibernate.dialect.PostgreSQLDialect</property>

        <!-- Enable Hibernate's automatic session context management -->
        <property name="current_session_context_class">thread</property>

        <!-- Disable the second-level cache  -->
        <property name="cache.provider_class">org.hibernate.cache.internal.NoCacheProvider</property>

        <!-- Echo all executed SQL to stdout -->
        <property name="show_sql">true</property>

        <!-- Drop and re-create the database schema on startup -->
        <property name="hbm2ddl.auto">create</property>
        <mapping class="com.waseem.UserDetails"/>
    </session-factory>
</hibernate-configuration>

Make sure File Location should be under src/main/resources/hibernate.cfg.xml

Insert multiple lines into a file after specified pattern using shell script

if you want to do that with a bash script, that's useful.

echo $password | echo 'net.ipv4.ping_group_range=0 2147483647' |  sudo -S tee -a /etc/sysctl.conf

How to save a data frame as CSV to a user selected location using tcltk

write.csv([enter name of dataframe here],file = file.choose(new = T))

After running above script this window will open :

Type the new file name with extension in the File name field and click Open, it'll ask you to create a new file to which you should select Yes and the file will be created and saved in the desired location.

Angular2: child component access parent class variable/function

The main article in the Angular2 documentation on this subject is :

https://angular.io/docs/ts/latest/cookbook/component-communication.html#!#parent-to-child

It covers the following:

Pass data from parent to child with input binding
Intercept input property changes with a setter
Intercept input property changes with ngOnChanges
Parent listens for child event
Parent interacts with child via a local variable
Parent calls a ViewChild
Parent and children communicate via a service

find all unchecked checkbox in jquery

You can use like this :

$(":checkbox:not(:checked)")

How to install SQL Server Management Studio 2012 (SSMS) Express?

You can download the 32bit or 64bit version of "Express With Tools" or "SQL Server Management Studio Express" (SSMSE tools only) from:

https://web.archive.org/web/20170507040411/https://www.microsoft.com/betaexperience/pd/SQLEXPNOCTAV2/enus/default.aspx

This link is for SQL Server 2012 Express Service Pack 1 released 11/09/2012 (11.0.3000.00) The original RTM release was 11.0.2100.60 from March or May of 2012.

enter image description here

What does the 'static' keyword do in a class?

The static keyword means that something (a field, method or nested class) is related to the type rather than any particular instance of the type. So for example, one calls Math.sin(...) without any instance of the Math class, and indeed you can't create an instance of the Math class.

For more information, see the relevant bit of Oracle's Java Tutorial.

Sidenote

Java unfortunately allows you to access static members as if they were instance members, e.g.

// Bad code!
Thread.currentThread().sleep(5000);
someOtherThread.sleep(5000);

That makes it look as if sleep is an instance method, but it's actually a static method - it always makes the current thread sleep. It's better practice to make this clear in the calling code:

// Clearer
Thread.sleep(5000);

Remove last character of a StringBuilder?

since you know the character you want to remove you can use this

sb.TrimEnd(",");

How to update values in a specific row in a Python Pandas DataFrame?

So first of all, pandas updates using the index. When an update command does not update anything, check both left-hand side and right-hand side. If you don't update the indices to follow your identification logic, you can do something along the lines of

>>> df.loc[df.filename == 'test2.dat', 'n'] = df2[df2.filename == 'test2.dat'].loc[0]['n']
>>> df
Out[331]: 
    filename   m     n
0  test0.dat  12  None
1  test2.dat  13    16

If you want to do this for the whole table, I suggest a method I believe is superior to the previously mentioned ones: since your identifier is filename, set filename as your index, and then use update() as you wanted to. Both merge and the apply() approach contain unnecessary overhead:

>>> df.set_index('filename', inplace=True)
>>> df2.set_index('filename', inplace=True)
>>> df.update(df2)
>>> df
Out[292]: 
            m     n
filename           
test0.dat  12  None
test2.dat  13    16

How to find the difference in days between two dates?

Use the shell functions from http://cfajohnson.com/shell/ssr/ssr-scripts.tar.gz; they work in any standard Unix shell.

date1=2012-09-22
date2=2013-01-31
. date-funcs-sh
_date2julian "$date1"
jd1=$_DATE2JULIAN
_date2julian "$date2"
echo $(( _DATE2JULIAN - jd1 ))

See the documentation at http://cfajohnson.com/shell/ssr/08-The-Dating-Game.shtml

Get Absolute URL from Relative path (refactored method)

check the following code to retrieve absolute Url :

Page.Request.Url.AbsoluteUri

I hope to be useful.

Why is php not running?

Check out the apache config files. For Debian/Ubuntu theyre in /etc/apache2/sites-available/ for RedHat/CentOS/etc they're in /etc/httpd/conf.d/. If you've just installed it, the file in there is probably named default.

Make sure that the config file in there is pointing to the correct folder and then make sure your scripts are located there.

The line you're looking for in those files is DocumentRoot /path/to/directory.

For a blank install, your php files most likely needs to be in /var/www/.

What you'll also need to do is find your php.ini file, probably located at /etc/php5/apache2/php.ini or /etc/php.ini and find the entry for display_errors and switch it to On.

Generate GUID in MySQL for existing Data?

select @i:=uuid();
update some_table set guid = (@i:=uuid());

How to link html pages in same or different folders?

For ASP.NET, this worked for me on development and deployment:

<a runat="server" href="~/Subfolder/TargetPage">TargetPage</a>

Using runat="server" and the href="~/" are the keys for going to the root.

How to approach a "Got minus one from a read call" error when connecting to an Amazon RDS Oracle instance

I got this error message from using an oracle database in a docker despite the fact i had publish port to host option "-p 1521:1521". I was using jdbc url that was using ip address 127.0.0.1, i changed it to the host machine real ip address and everything worked then.

How to find a string inside a entire database?

I think you have to options:

Build a dynamic SQL using sys.tables and sys.columns to perform the search (example here).
Use any program that have this function. An example of this is SQL Workbench (free).

Find duplicate entries in a column

Try this query.. It uses the Analytic function SUM:

SELECT * FROM
(  
 SELECT SUM(1) OVER(PARTITION BY ctn_no) cnt, A.*
 FROM table1 a 
 WHERE s_ind ='Y'   
)
WHERE cnt > 2

Am not sure why you are identifying a record as a duplicate if the ctn_no repeats more than 2 times. FOr me it repeats more than once it is a duplicate. In this case change the las part of the query to WHERE cnt > 1

Determine if char is a num or letter

You can normally check for ASCII letters or numbers using simple conditions

if ((ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z'))
{
    /*This is an alphabet*/
}

For digits you can use

if (ch >= '0' && ch <= '9')
{
    /*It is a digit*/
}

But since characters in C are internally treated as ASCII values you can also use ASCII values to check the same.

How to check if a character is number or letter

How do I install pip on macOS or OS X?

?? TL;DR — One line solution.

All you have to do is:

sudo easy_install pip

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

I made a gif, coz. why not?

Details:

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

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

python --version

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

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

sudo easy_install pip

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

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

Cheers!

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

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

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

First of all download the get-pip file

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

Now run this file to install pip

python get-pip.py

That should do it.

Another gif you said? Here ya go!

Access blocked by CORS policy: Response to preflight request doesn't pass access control check

Since the originating port 4200 is different than 8080,So before angular sends a create (PUT) request,it will send an OPTIONS request to the server to check what all methods and what all access-controls are in place. Server has to respond to that OPTIONS request with list of allowed methods and allowed origins.

Since you are using spring boot, the simple solution is to add ".allowedOrigins("http://localhost:4200");"

In your spring config,class

@Configuration
@EnableWebMvc
public class SpringConfig implements WebMvcConfigurer {

    @Override
    public void addCorsMappings(CorsRegistry registry) {
        registry.addMapping("/**").allowedOrigins("http://localhost:4200");
    }
}

However a better approach will be to write a Filter(interceptor) which adds the necessary headers to each response.

Javascript - How to extract filename from a file input control

None of the above answers worked for me, here is my solution which updates a disabled input with the filename:

<script type="text/javascript"> 
  document.getElementById('img_name').onchange = function () {
  var filePath = this.value;
    if (filePath) {
      var fileName = filePath.replace(/^.*?([^\\\/]*)$/, '$1');
      document.getElementById('img_name_input').value = fileName;
    }
  };
</script>

MIT vs GPL license

IANAL but as I see it....

While you can combine GPL and MIT code, the GPL is tainting. Which means the package as a whole gets the limitations of the GPL. As that is more restrictive you can no longer use it in commercial (or rather closed source) software. Which also means if you have a MIT/BSD/ASL project you will not want to add dependencies to GPL code.

Adding a GPL dependency does not change the license of your code but it will limit what people can do with the artifact of your project. This is also why the ASF does not allow dependencies to GPL code for their projects.

http://www.apache.org/licenses/GPL-compatibility.html

How do you say not equal to in Ruby?

Yes. In Ruby the not equal to operator is:

!=

You can get a full list of ruby operators here: https://www.tutorialspoint.com/ruby/ruby_operators.htm.

How to change navbar/container width? Bootstrap 3

If you are dealing with more dynamic screen resolution/sizes, instead of hardcoding the size in pixels you can change the width to a percentage of the media width as such

@media (min-width: 1200px) {
    .container{
        max-width: 70%;
   }
}

Generating random strings with T-SQL

Using a guid

SELECT @randomString = CONVERT(varchar(255), NEWID())

very short ...

Clear dropdown using jQuery Select2

I found the answer (compliments to user780178) I was looking for in this other question:

Reset select2 value and show placeholdler

$("#customers_select").select2("val", "");

iOS 6 apps - how to deal with iPhone 5 screen size?

@interface UIDevice (Screen)
typedef enum
{
    iPhone          = 1 << 1,
    iPhoneRetina    = 1 << 2,
    iPhone5         = 1 << 3,
    iPad            = 1 << 4,
    iPadRetina      = 1 << 5

} DeviceType;

+ (DeviceType)deviceType;
@end

#import "UIDevice+Screen.h"
@implementation UIDevice (Screen)

+ (DeviceType)deviceType
{
    DeviceType thisDevice = 0;
    if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone)
    {
        thisDevice |= iPhone;
        if ([[UIScreen mainScreen] respondsToSelector: @selector(scale)])
        {
            thisDevice |= iPhoneRetina;
            if ([[UIScreen mainScreen] bounds].size.height == 568)
                thisDevice |= iPhone5;
        }
    }
    else
    {
        thisDevice |= iPad;
        if ([[UIScreen mainScreen] respondsToSelector: @selector(scale)])
            thisDevice |= iPadRetina;
    }
    return thisDevice;
}

@end

This way, if you want to detect whether it is just an iPhone or iPad (regardless of screen-size), you just use:

if ([UIDevice deviceType] & iPhone)

if ([UIDevice deviceType] & iPad)

If you want to detect just the iPhone 5, you can use

if ([UIDevice deviceType] & iPhone5)

As opposed to Malcoms answer where you would need to check just to figure out if it's an iPhone,

if ([UIDevice currentResolution] == UIDevice_iPhoneHiRes || 
    [UIDevice currentResolution] == UIDevice_iPhoneStandardRes || 
    [UIDevice currentResolution] == UIDevice_iPhoneTallerHiRes)`

Neither way has a major advantage over one another, it is just a personal preference.

How to deep copy a list?

E0_copy is not a deep copy. You don't make a deep copy using list() (Both list(...) and testList[:] are shallow copies).

You use copy.deepcopy(...) for deep copying a list.

deepcopy(x, memo=None, _nil=[])
    Deep copy operation on arbitrary Python objects.

See the following snippet -

>>> a = [[1, 2, 3], [4, 5, 6]]
>>> b = list(a)
>>> a
[[1, 2, 3], [4, 5, 6]]
>>> b
[[1, 2, 3], [4, 5, 6]]
>>> a[0][1] = 10
>>> a
[[1, 10, 3], [4, 5, 6]]
>>> b   # b changes too -> Not a deepcopy.
[[1, 10, 3], [4, 5, 6]]

Now see the deepcopy operation

>>> import copy
>>> b = copy.deepcopy(a)
>>> a
[[1, 10, 3], [4, 5, 6]]
>>> b
[[1, 10, 3], [4, 5, 6]]
>>> a[0][1] = 9
>>> a
[[1, 9, 3], [4, 5, 6]]
>>> b    # b doesn't change -> Deep Copy
[[1, 10, 3], [4, 5, 6]]

Angular 2: import external js file into component

Ideally you need to have .d.ts file for typings to let Linting work.

But It seems that d3gauge doesn't have one, you can Ask the developers to provide and hope they will listen.

Alternatively, you can solve this specific issue by doing this

declare var drawGauge: any;

import '../../../../js/d3gauge.js';
export class MemMonComponent {
    createMemGauge() {
        new drawGauge(this.opt);  //drawGauge() is a function inside d3gauge.js
    }
}

If you use it in multiple files, you can create a d3gauage.d.ts file with the content below

declare var drawGauge: any;

and reference it in your boot.ts (bootstrap) file at the top, like this

///<reference path="../path/to/d3gauage.d.ts"/>

What is the use of WPFFontCache Service in WPF? WPFFontCache_v0400.exe taking 100 % CPU all the time this exe is running, why?

From MSDN:

The WPF Font Cache service shares font data between WPF applications. The first WPF application you run starts this service if the service is not already running. If you are using Windows Vista, you can set the "Windows Presentation Foundation (WPF) Font Cache 3.0.0.0" service from "Manual" (the default) to "Automatic (Delayed Start)" to reduce the initial start-up time of WPF applications.

There's no harm in disabling it, but WPF apps tend to start faster and load fonts faster with it running.
It is supposed to be a performance optimization. The fact that it is not in your case makes me suspect that perhaps your font cache is corrupted. To clear it, follow these steps:

Stop the WPF Font Cache 4.0 service.
Delete all of the WPFFontCache_v0400* files. In Windows XP, you'll find them in your C:\Documents and Settings\LocalService\Local Settings\Application Data\ folder.
Start the service again.

PHP random string generator

Try this:

function generate_name ($length = LENGTH_IMG_PATH) {
    $image_name = "";
    $possible = "0123456789abcdefghijklmnopqrstuvwxyz";

    $i = 0;

    while ($i < $length) {

        $char = substr($possible, mt_rand(0, strlen($possible)-1), 1);

        if (!strstr($image_name, $char)) {
            $image_name .= $char;
            $i++;
        }
    }
    return $image_name;
}

How to use regex in file find

Use -regex:

From the man page:

-regex pattern
       File name matches regular expression pattern.  This is a match on the whole path, not a search.  For example, to match a file named './fubar3',  you  can  use  the
       regular expression '.*bar.' or '.*b.*3', but not 'b.*r3'.

Also, I don't believe find supports regex extensions such as \d. You need to use [0-9].

find . -regex '.*test\.log\.[0-9][0-9][0-9][0-9]-[0-9][0-9]-[0-9][0-9]\.zip'

error TS1086: An accessor cannot be declared in an ambient context in Angular 9

First please check in module.ts file that in @NgModule all properties are only one time. If any of are more than one time then also this error come. Because I had also occur this error but in module.ts file entryComponents property were two time that's why I was getting this error. I resolved this error by removing one time entryComponents from @NgModule. So, I recommend that first you check it properly.

How to get $(this) selected option in jQuery?

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

Since option is likely to be immediate child of select you can also use:

var cur_value = $(this).children('option:selected').text();

http://api.jquery.com/find/

Java Timestamp - How can I create a Timestamp with the date 23/09/2007?

By Timestamp, I presume you mean java.sql.Timestamp. You will notice that this class has a constructor that accepts a long argument. You can parse this using the DateFormat class:

DateFormat dateFormat = new SimpleDateFormat("dd/MM/yyyy");
Date date = dateFormat.parse("23/09/2007");
long time = date.getTime();
new Timestamp(time);

Android: How to handle right to left swipe gestures

If you want to display some buttons with actions when an list item is swipe are a lot of libraries on the internet that have this behavior. I implemented the library that I found on the internet and I am very satisfied. It is very simple to use and very quick. I improved the original library and I added a new click listener for item click. Also I added font awesome library (http://fortawesome.github.io/Font-Awesome/) and now you can simply add a new item title and specify the icon name from font awesome.

Here is the github link

Failed Apache2 start, no error log

Try to disable SElinux or configuration virtualhost for SElinux

to configuration with SElinux https://muchbits.com/apache-selinux-vhosts.html

to disable SElinux https://linuxize.com/post/how-to-disable-selinux-on-centos-7/

PHP, getting variable from another php-file

You could also use file_get_contents

 $url_a="http://127.0.0.1/get_value.php?line=a&shift=1&tgl=2017-01-01";
 $data_a=file_get_contents($url_a);

 echo $data_a;

Error when testing on iOS simulator: Couldn't register with the bootstrap server

Try quitting and restarting the simulator? If "worse comes to worst" you can always try restarting: in my experience this should fix it.

Is there a command like "watch" or "inotifywait" on the Mac?

I ended up doing this for macOS. I'm sure this is terrible in many ways:

#!/bin/sh
# watchAndRun
if [ $# -ne 2 ]; then
    echo "Use like this:"
    echo "   $0 filename-to-watch command-to-run"
    exit 1
fi
if which fswatch >/dev/null; then
    echo "Watching $1 and will run $2"
    while true; do fswatch --one-event $1 >/dev/null && $2; done
else
    echo "You might need to run: brew install fswatch"
fi

How to get the children of the $(this) selector?

You may have 0 to many <img> tags inside of your <div>.

To find an element, use a .find().

To keep your code safe, use a .each().

Using .find() and .each() together prevents null reference errors in the case of 0 <img> elements while also allowing for handling of multiple <img> elements.

_x000D_

// Set the click handler on your div_x000D_
$("body").off("click", "#mydiv").on("click", "#mydiv", function() {_x000D_
_x000D_
  // Find the image using.find() and .each()_x000D_
  $(this).find("img").each(function() {_x000D_
  _x000D_
        var img = this;  // "this" is, now, scoped to the image element_x000D_
        _x000D_
        // Do something with the image_x000D_
        $(this).animate({_x000D_
          width: ($(this).width() > 100 ? 100 : $(this).width() + 100) + "px"_x000D_
        }, 500);_x000D_
        _x000D_
  });_x000D_
  _x000D_
});

_x000D_

#mydiv {_x000D_
  text-align: center;_x000D_
  vertical-align: middle;_x000D_
  background-color: #000000;_x000D_
  cursor: pointer;_x000D_
  padding: 50px;_x000D_
  _x000D_
}

_x000D_

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>_x000D_
_x000D_
<div id="mydiv">_x000D_
  <img src="" width="100" height="100"/>_x000D_
</div>

_x000D_

Why can't I display a pound (£) symbol in HTML?

Educated guess: You have a ISO-8859-1 encoded pound sign in a UTF-8 encoded page.

Make sure your data is in the right encoding and everything will work fine.

Scheduling recurring task in Android

I am not sure but as per my knowledge I share my views. I always accept best answer if I am wrong .

Alarm Manager

The Alarm Manager holds a CPU wake lock as long as the alarm receiver's onReceive() method is executing. This guarantees that the phone will not sleep until you have finished handling the broadcast. Once onReceive() returns, the Alarm Manager releases this wake lock. This means that the phone will in some cases sleep as soon as your onReceive() method completes. If your alarm receiver called Context.startService(), it is possible that the phone will sleep before the requested service is launched. To prevent this, your BroadcastReceiver and Service will need to implement a separate wake lock policy to ensure that the phone continues running until the service becomes available.

Note: The Alarm Manager is intended for cases where you want to have your application code run at a specific time, even if your application is not currently running. For normal timing operations (ticks, timeouts, etc) it is easier and much more efficient to use Handler.

Timer

timer = new Timer();

    timer.scheduleAtFixedRate(new TimerTask() {

        synchronized public void run() {

            \\ here your todo;
            }

        }, TimeUnit.MINUTES.toMillis(1), TimeUnit.MINUTES.toMillis(1));

Timer has some drawbacks that are solved by ScheduledThreadPoolExecutor. So it's not the best choice

ScheduledThreadPoolExecutor.

You can use java.util.Timer or ScheduledThreadPoolExecutor (preferred) to schedule an action to occur at regular intervals on a background thread.

Here is a sample using the latter:

ScheduledExecutorService scheduler =
    Executors.newSingleThreadScheduledExecutor();

scheduler.scheduleAtFixedRate
      (new Runnable() {
         public void run() {
            // call service
         }
      }, 0, 10, TimeUnit.MINUTES);

So I preferred ScheduledExecutorService

But Also think about that if the updates will occur while your application is running, you can use a Timer, as suggested in other answers, or the newer ScheduledThreadPoolExecutor. If your application will update even when it is not running, you should go with the AlarmManager.

The Alarm Manager is intended for cases where you want to have your application code run at a specific time, even if your application is not currently running.

Take note that if you plan on updating when your application is turned off, once every ten minutes is quite frequent, and thus possibly a bit too power consuming.

How to automatically generate getters and setters in Android Studio

Use Ctrl+Enter on Mac to get list of options to generate setter, getter, constructor etc

Could not load file or assembly 'CrystalDecisions.ReportAppServer.CommLayer, Version=13.0.2000.0

If you already have the DLL copied to your project and the Copy Local flag is in true, the solution should be just rebuild the project. That will copy the DLL to the bin folder.

Lightweight workflow engine for Java

I agree with the guys that already posted responses here, or part of their responses anyway :P, but as here in the company where I am currently working we had a similar challenge I took the liberty of adding my opinion, based on our experience.

We needed to migrate an application that was using the jBPM workflow engine in a production related applications and as there were quite a few challenges in maintaining the application we decided to see if there are better options on the market. We came to the list already mentioned:

Activiti (planned to try it through a prototype)
Bonita (planned to try it through a prototype)
jBPM (disqualified due to past experience)

We decided not to use jBPM anymore as our initial experience with it was not the best, besides this the backwards compatibility was broken with every new version that was released.

Finally the solution that we used, was to develop a lightweight workflow engine, based on annotations having activities and processes as abstractions. It was more or less a state machine that did it's job.

Another point that is worth mentioning when discussing about workflow engine is the fact they are dependent on the backing DB - it was the case with the two workflow engines I have experience with (SAG webMethods and jPBM) - and from my experience that was a little bit of an overhead especially during migrations between versions.

So, I would say that using an workflow engine is entitled only for applications that would really benefit from it and where most of the workflow of the applications is spinning around the workflow itself otherwise there are better tools for the job:

wizards (Spring Web Flow)
self built state machines

Regarding state machines, I came across this response that contains a rather complete collection of state machine java frameworks.

Hope this helps.

Programs & Examples On #Tuple packing

jQuery - replace all instances of a character in a string

C#: Looping through lines of multiline string

Matching a space in regex

Error: Selection does not contain a main type

How to connect to remote Oracle DB with PL/SQL Developer?

Avoiding "resource is out of sync with the filesystem"

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

Python vs Bash - In which kind of tasks each one outruns the other performance-wise?

To check if string contains particular word

Lombok added but getters and setters not recognized in Intellij IDEA

What is an example of the simplest possible Socket.io example?

index.html

app.js

Defining Z order of views of RelativeLayout in Android

Math operations from string

What is the difference between Java RMI and RPC?

What is the `data-target` attribute in Bootstrap 3?

How do I determine file encoding in OS X?

Forward host port to docker container

In Perl, how do I create a hash whose keys come from a given array?

how to assign a block of html code to a javascript variable

I can’t find the Android keytool

How do I convert a double into a string in C++?

Set timeout for webClient.DownloadFile()

add scroll bar to table body

Hiding table data using <div style="display:none">

How to declare a vector of zeros in R

How to calculate 1st and 3rd quartiles?

Java 8, Streams to find the duplicate elements

Java "?" Operator for checking null - What is it? (Not Ternary!)

Best way to use multiple SSH private keys on one client

Difference between variable declaration syntaxes in Javascript (including global variables)?

JavaFX Location is not set error message

How to recover closed output window in netbeans?

C++ where to initialize static const

UIScrollView not scrolling

PHP fopen() Error: failed to open stream: Permission denied

Fastest way to copy a file in Node.js

How to know if other threads have finished?

Convert a PHP script into a stand-alone windows executable

Oracle SQL Query for listing all Schemas in a DB

Can you force Vue.js to reload/re-render?

How do you fade in/out a background color using jquery?

Java Mouse Event Right Click

Convert Pandas Column to DateTime

default select option as blank

Difference between malloc and calloc?

Creating a triangle with for loops

opening html from google drive

Android overlay a view ontop of everything?

Difference Between $.getJSON() and $.ajax() in jQuery

Moment Js UTC to Local Time

Example:

Demo:

What are the sizes used for the iOS application splash screen?

What does it mean when Statement.executeUpdate() returns -1?

Posting parameters to a url using the POST method without using a form

ldap query for group members

2 "style" inline css img tags?

Java: Static Class?

Can I replace groups in Java regex?

Display images in asp.net mvc

Get the generated SQL statement from a SqlCommand object?

Change color and appearance of drop down arrow

How do I mount a remote Linux folder in Windows through SSH?

Auto height of div

No server in Eclipse; trying to install Tomcat

Expected response code 250 but got code "530", with message "530 5.7.1 Authentication required

groovy.lang.MissingPropertyException: No such property: jenkins for class: groovy.lang.Binding

Store output of sed into a variable

jQuery Datepicker localization

Fit image to table cell [Pure HTML]

Increasing nesting function calls limit

getting the screen density programmatically in android?

Credentials for the SQL Server Agent service are invalid

Set UITableView content inset permanently

CSS center display inline block?

Reading an integer from user input

Validation error: "No validator could be found for type: java.lang.Integer"