Count characters in textarea

U can use :

    $(document).ready(function () {
  $('#ID').keyup(function () {
   var val = $(this).val();
   len = val.length;
   if (len >= 140) {
    $(this).text(val.substring(0, 140));
   } else {
    console.log(140 - len);
    $('#charNum').empty().append(140 - len);
   }
  });
 });

What are the options for (keyup) in Angular2?

One like with events

(keydown)="$event.keyCode != 32 ? $event:$event.preventDefault()"

CSS/HTML: Create a glowing border around an Input Field

_x000D_

$('.form-fild input,.form-fild textarea').focus(function() {_x000D_
    $(this).parent().addClass('open');_x000D_
});_x000D_
_x000D_
$('.form-fild input,.form-fild textarea').blur(function() {_x000D_
    $(this).parent().removeClass('open');_x000D_
});

_x000D_

.open {_x000D_
  color:red;   _x000D_
}_x000D_
.form-fild {_x000D_
 position: relative;_x000D_
 margin: 30px 0;_x000D_
}_x000D_
.form-fild label {_x000D_
 position: absolute;_x000D_
 top: 5px;_x000D_
 left: 10px;_x000D_
 padding:5px;_x000D_
}_x000D_
_x000D_
.form-fild.open label {_x000D_
 top: -25px;_x000D_
 left: 10px;_x000D_
 /*background: #ffffff;*/_x000D_
}_x000D_
.form-fild input[type="text"] {_x000D_
 padding-left: 80px;_x000D_
}_x000D_
.form-fild textarea {_x000D_
 padding-left: 80px;_x000D_
}_x000D_
.form-fild.open textarea, _x000D_
.form-fild.open input[type="text"] {_x000D_
 padding-left: 10px;_x000D_
}_x000D_
textarea,_x000D_
input[type="text"] {_x000D_
 padding: 10px;_x000D_
 width: 100%;_x000D_
}_x000D_
textarea,_x000D_
input,_x000D_
.form-fild.open label,_x000D_
.form-fild label {_x000D_
 -webkit-transition: all 0.2s ease-in-out;_x000D_
       -moz-transition: all 0.2s ease-in-out;_x000D_
         -o-transition: all 0.2s ease-in-out;_x000D_
            transition: all 0.2s ease-in-out;_x000D_
}

_x000D_

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>_x000D_
<div class="container">_x000D_
 <div class="row">_x000D_
     <form>_x000D_
        <div class="form-fild">_x000D_
            <label>Name :</label>_x000D_
            <input type="text">_x000D_
        </div>_x000D_
        <div class="form-fild">_x000D_
            <label>Email :</label>_x000D_
            <input type="text">_x000D_
        </div>_x000D_
        <div class="form-fild">_x000D_
            <label>Number :</label>_x000D_
            <input type="text">_x000D_
        </div>_x000D_
        <div class="form-fild">_x000D_
            <label>Message :</label>_x000D_
            <textarea cols="10" rows="5"></textarea>_x000D_
        </div>_x000D_
    </form>_x000D_
    </div>_x000D_
</div>

_x000D_

PermGen elimination in JDK 8

Oracle's JVM implementation for Java 8 got rid of the PermGen model and replaced it with Metaspace.

How to set-up a favicon?

<!DOCTYPE html 
      PUBLIC "-//W3C//DTD HTML 4.01//EN"
      "http://www.w3.org/TR/html4/strict.dtd">
<html lang="en-US">
<head profile="http://www.w3.org/2005/10/profile">
<link rel="icon" 
      type="image/png" 
      href="http://example.com/myicon.png">
</head>
<body>
...
</body>
</html>

rel="shortcut icon" should be rel="icon"

Source: W3C

Given a DateTime object, how do I get an ISO 8601 date in string format?

You have a few options including the "Round-trip ("O") format specifier".

var date1 = new DateTime(2008, 3, 1, 7, 0, 0);
Console.WriteLine(date1.ToString("O"));
Console.WriteLine(date1.ToString("s", System.Globalization.CultureInfo.InvariantCulture));

Output

2008-03-01T07:00:00.0000000
2008-03-01T07:00:00

However, DateTime + TimeZone may present other problems as described in the blog post DateTime and DateTimeOffset in .NET: Good practices and common pitfalls:

DateTime has countless traps in it that are designed to give your code bugs:

1.- DateTime values with DateTimeKind.Unspecified are bad news.

2.- DateTime doesn't care about UTC/Local when doing comparisons.

3.- DateTime values are not aware of standard format strings.

4.- Parsing a string that has a UTC marker with DateTime does not guarantee a UTC time.

force client disconnect from server with socket.io and nodejs

This didn't work for me:

`socket.disconnect()`

This did work for me:

socket.disconnect(true)

Handing over true will close the underlaying connection to the client and not just the namespace the client is connected to Socket IO Documentation.

An example use case: Client did connect to web socket server with invalid access token (access token handed over to web socket server with connection params). Web socket server notifies the client that it is going to close the connection, because of his invalid access token:

// (1) the server code emits
socket.emit('invalidAccessToken', function(data) {
    console.log(data);       // (4) server receives 'invalidAccessTokenEmitReceived' from client
    socket.disconnect(true); // (5) force disconnect client 
});

// (2) the client code listens to event
// client.on('invalidAccessToken', (name, fn) => { 
//     // (3) the client ack emits to server
//     fn('invalidAccessTokenEmitReceived');
// });

How to install PyQt5 on Windows?

If you have python installed completely, it can save you the hassle. All you need to do is enter the following command in your respective shell:

pip install pyqt5

And contrary to popular belief, AS LONG AS YOU HAVE PIP INSTALLED, you can do this on virtually any OS... Hope this helped!

How to install python modules without root access?

If you have to use a distutils setup.py script, there are some commandline options for forcing an installation destination. See http://docs.python.org/install/index.html#alternate-installation. If this problem repeats, you can setup a distutils configuration file, see http://docs.python.org/install/index.html#inst-config-files.

Setting the PYTHONPATH variable is described in tihos post.

How to declare a static const char* in your header file?

class A{
public:
   static const char* SOMETHING() { return "something"; }
};

I do it all the time - especially for expensive const default parameters.

class A{
   static
   const expensive_to_construct&
   default_expensive_to_construct(){
      static const expensive_to_construct xp2c(whatever is needed);
      return xp2c;
   }
};

how to update the multiple rows at a time using linq to sql?

This is what I did:

EF:

using (var context = new SomeDBContext())
{
    foreach (var item in model.ShopItems)  // ShopItems is a posted list with values 
    {    
        var feature = context.Shop
                             .Where(h => h.ShopID == 123 && h.Type == item.Type).ToList();

        feature.ForEach(a => a.SortOrder = item.SortOrder);
    }

    context.SaveChanges();
}

Hope helps someone.

Android Completely transparent Status Bar?

To draw your layout under statusbar:

values/styles.xml

<item name="android:windowTranslucentStatus">true</item>

values-v21/styles.xml

<item name="android:windowDrawsSystemBarBackgrounds">true</item>
<item name="android:statusBarColor">@color/colorPrimaryDark</item>

Use CoordinatorLayout/DrawerLayout which already take care of the fitsSystemWindows parameter or create your own layout to like this:

public class FitsSystemWindowConstraintLayout extends ConstraintLayout {

    private Drawable mStatusBarBackground;
    private boolean mDrawStatusBarBackground;

    private WindowInsetsCompat mLastInsets;

    private Map<View, int[]> childsMargins = new HashMap<>();

    public FitsSystemWindowConstraintLayout(Context context) {
        this(context, null);
    }

    public FitsSystemWindowConstraintLayout(Context context, AttributeSet attrs) {
        this(context, attrs, 0);
    }

    public FitsSystemWindowConstraintLayout(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);

        if (ViewCompat.getFitsSystemWindows(this)) {
            ViewCompat.setOnApplyWindowInsetsListener(this, new android.support.v4.view.OnApplyWindowInsetsListener() {
                @Override
                public WindowInsetsCompat onApplyWindowInsets(View view, WindowInsetsCompat insets) {
                    FitsSystemWindowConstraintLayout layout = (FitsSystemWindowConstraintLayout) view;
                    layout.setChildInsets(insets, insets.getSystemWindowInsetTop() > 0);
                    return insets.consumeSystemWindowInsets();
                }
            });
            setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_STABLE
                    | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
            TypedArray typedArray = context.obtainStyledAttributes(new int[]{android.R.attr.colorPrimaryDark});
            try {
                mStatusBarBackground = typedArray.getDrawable(0);
            } finally {
                typedArray.recycle();
            }
        } else {
            mStatusBarBackground = null;
        }
    }

    public void setChildInsets(WindowInsetsCompat insets, boolean draw) {
        mLastInsets = insets;
        mDrawStatusBarBackground = draw;
        setWillNotDraw(!draw && getBackground() == null);

        for (int i = 0; i < getChildCount(); i++) {
            View child = getChildAt(i);
            if (child.getVisibility() != GONE) {
                if (ViewCompat.getFitsSystemWindows(this)) {
                    ConstraintLayout.LayoutParams layoutParams = (ConstraintLayout.LayoutParams) child.getLayoutParams();

                    if (ViewCompat.getFitsSystemWindows(child)) {
                        ViewCompat.dispatchApplyWindowInsets(child, insets);
                    } else {
                        int[] childMargins = childsMargins.get(child);
                        if (childMargins == null) {
                            childMargins = new int[]{layoutParams.leftMargin, layoutParams.topMargin, layoutParams.rightMargin, layoutParams.bottomMargin};
                            childsMargins.put(child, childMargins);
                        }
                        if (layoutParams.leftToLeft == LayoutParams.PARENT_ID) {
                            layoutParams.leftMargin = childMargins[0] + insets.getSystemWindowInsetLeft();
                        }
                        if (layoutParams.topToTop == LayoutParams.PARENT_ID) {
                            layoutParams.topMargin = childMargins[1] + insets.getSystemWindowInsetTop();
                        }
                        if (layoutParams.rightToRight == LayoutParams.PARENT_ID) {
                            layoutParams.rightMargin = childMargins[2] + insets.getSystemWindowInsetRight();
                        }
                        if (layoutParams.bottomToBottom == LayoutParams.PARENT_ID) {
                            layoutParams.bottomMargin = childMargins[3] + insets.getSystemWindowInsetBottom();
                        }
                    }
                }
            }
        }

        requestLayout();
    }

    public void setStatusBarBackground(Drawable bg) {
        mStatusBarBackground = bg;
        invalidate();
    }

    public Drawable getStatusBarBackgroundDrawable() {
        return mStatusBarBackground;
    }

    public void setStatusBarBackground(int resId) {
        mStatusBarBackground = resId != 0 ? ContextCompat.getDrawable(getContext(), resId) : null;
        invalidate();
    }

    public void setStatusBarBackgroundColor(@ColorInt int color) {
        mStatusBarBackground = new ColorDrawable(color);
        invalidate();
    }

    @Override
    public void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        if (mDrawStatusBarBackground && mStatusBarBackground != null) {
            int inset = mLastInsets != null ? mLastInsets.getSystemWindowInsetTop() : 0;
            if (inset > 0) {
                mStatusBarBackground.setBounds(0, 0, getWidth(), inset);
                mStatusBarBackground.draw(canvas);
            }
        }
    }
}

main_activity.xml

<FitsSystemWindowConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fitsSystemWindows="true">

    <ImageView
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:fitsSystemWindows="true"
        android:scaleType="centerCrop"
        android:src="@drawable/toolbar_background"
        app:layout_constraintBottom_toBottomOf="@id/toolbar"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <android.support.v7.widget.Toolbar
        android:id="@+id/toolbar"
        android:layout_width="0dp"
        android:layout_height="?attr/actionBarSize"
        android:background="@android:color/transparent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <LinearLayout
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:gravity="center"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toBottomOf="@id/toolbar">

        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:text="Content"
            android:textSize="48sp" />
    </LinearLayout>
</FitsSystemWindowConstraintLayout>

Result:

Screenshot:

Datetime in where clause

First of all, I'd recommend using the ISO-8601 standard format for date/time - it works regardless of the language and regional settings on your SQL Server. ISO-8601 is the YYYYMMDD format - no spaces, no dashes - just the data:

select * from tblErrorLog
where errorDate = '20081220'

Second of all, you need to be aware that SQL Server 2005 DATETIME always includes a time. If you check for exact match with just the date part, you'll get only rows that match with a time of 0:00:00 - nothing else.

You can either use any of the recommend range queries mentioned, or in SQL Server 2008, you could use the DATE only date time - or you could do a check something like:

select * from tblErrorLog
where DAY(errorDate) = 20 AND MONTH(errorDate) = 12 AND YEAR(errorDate) = 2008

Whichever works best for you.

If you need to do this query often, you could either try to normalize the DATETIME to include only the date, or you could add computed columns for DAY, MONTH and YEAR:

ALTER TABLE tblErrorLog
   ADD ErrorDay AS DAY(ErrorDate) PERSISTED
ALTER TABLE tblErrorLog
   ADD ErrorMonth AS MONTH(ErrorDate) PERSISTED
ALTER TABLE tblErrorLog
   ADD ErrorYear AS YEAR(ErrorDate) PERSISTED

and then you could query more easily:

select * from tblErrorLog
where ErrorMonth = 5 AND ErrorYear = 2009

and so forth. Since those fields are computed and PERSISTED, they're always up to date and always current, and since they're peristed, you can even index them if needed.

Incrementing in C++ - When to use x++ or ++x?

You explained the difference correctly. It just depends on if you want x to increment before every run through a loop, or after that. It depends on your program logic, what is appropriate.

An important difference when dealing with STL-Iterators (which also implement these operators) is, that it++ creates a copy of the object the iterator points to, then increments, and then returns the copy. ++it on the other hand does the increment first and then returns a reference to the object the iterator now points to. This is mostly just relevant when every bit of performance counts or when you implement your own STL-iterator.

Edit: fixed the mixup of prefix and suffix notation

Notice: Array to string conversion in

One of reasons why you will get this Notice: Array to string conversion in… is that you are combining group of arrays. Example, sorting out several first and last names.

To echo elements of array properly, you can use the function, implode(separator, array) Example:

implode(' ', $var)

result:

first name[1], last name[1]
first name[2], last name[2]

More examples from W3C.

Make a table fill the entire window

This works fine for me:

_x000D_

<style type="text/css">_x000D_
#table {_x000D_
 position: absolute;_x000D_
 top: 0;_x000D_
 bottom: 0;_x000D_
 left: 0;_x000D_
 right: 0;_x000D_
 height: 100%;_x000D_
 width: 100%;_x000D_
}_x000D_
</style>

_x000D_

For me, just changing Height and Width to 100% doesn’t do it for me, and neither do setting left, right, top and bottom to 0, but using them both together will do the trick.

Margin while printing html page

I also recommend pt versus cm or mm as it's more precise. Also, I cannot get @page to work in Chrome (version 30.0.1599.69 m) It ignores anything I put for the margins, large or small. But, you can get it to work with body margins on the document, weird.

Programmatically Hide/Show Android Soft Keyboard

Did you try InputMethodManager.SHOW_IMPLICIT in first window.

and for hiding in second window use InputMethodManager.HIDE_IMPLICIT_ONLY

EDIT :

If its still not working then probably you are putting it at the wrong place. Override onFinishInflate() and show/hide there.

@override
public void onFinishInflate() {
     /* code to show keyboard on startup */
    InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
    imm.showSoftInput(mUserNameEdit, InputMethodManager.SHOW_IMPLICIT);
}

Make $JAVA_HOME easily changable in Ubuntu

Traditionally, if you only want to change the variable in your terminal windows, set it in .bashrc file, which is sourced each time a new terminal is opened. .profile file is not sourced each time you open a new terminal.

See the difference between .profile and .bashrc in question: What's the difference between .bashrc, .bash_profile, and .environment?

.bashrc should solve your problem. However, it is not the proper solution since you are using Ubuntu. See the relevant Ubuntu help page "Session-wide environment variables". Thus, no wonder that .profile does not work for you. I use Ubuntu 12.04 and xfce. I set up my .profile and it is simply not taking effect even if I log out and in. Similar experience here. So you may have to use .pam_environment file and totally forget about .profile, and .bashrc. And NOTE that .pam_environment is not a script file.

Is there any way to set environment variables in Visual Studio Code?

In the VSCode launch.json you can use "env" and configure all your environment variables there:

{
    "version": "0.2.0",
    "configurations": [
        {           
            "env": {
                "NODE_ENV": "development",
                "port":"1337"
            },
            ...
        }
    ]
}

Specifying width and height as percentages without skewing photo proportions in HTML

Given the lack of information regarding the original image size, specifying percentages for the width and height would result in highly erratic results. If you are trying to ensure that an image will fit within a specific location on your page then you'll need to use some server side code to manage that rescaling.

JQuery addclass to selected div, remove class if another div is selected

In this mode you can find all element which has class active and remove it

try this

$(document).ready(function() {
        $(this.attr('id')).click(function () {
           $(document).find('.active').removeClass('active');
           var DivId = $(this).attr('id');
           alert(DivId);
           $(this).addClass('active');
        });
  });

Tomcat base URL redirection

What i did:

I added the following line inside of ROOT/index.jsp

 <meta http-equiv="refresh" content="0;url=/somethingelse/index.jsp"/>

Is there a way to cache GitHub credentials for pushing commits?

You can also have Git store your credentials permanently using the following:

git config credential.helper store

Note: While this is convenient, Git will store your credentials in clear text in a local file (.git-credentials) under your project directory (see below for the "home" directory). If you don't like this, delete this file and switch to using the cache option.

If you want Git to resume to asking you for credentials every time it needs to connect to the remote repository, you can run this command:

git config --unset credential.helper

To store the passwords in .git-credentials in your %HOME% directory as opposed to the project directory: use the --global flag

git config --global credential.helper store

Show row number in row header of a DataGridView

you can do this :

private void setRowNumber(DataGridView dgv)
{
    foreach (DataGridViewRow row in dgv.Rows)
    {
        row.HeaderCell.Value = row.Index + 1;
    }

    dgv.AutoResizeRowHeadersWidth(DataGridViewRowHeadersWidthSizeMode.AutoSizeToAllHeaders);

}

Finding the max value of an attribute in an array of objects

Find the object whose property "Y" has the greatest value in an array of objects

One way would be to use Array reduce..

const max = data.reduce(function(prev, current) {
    return (prev.y > current.y) ? prev : current
}) //returns object

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/Reduce http://caniuse.com/#search=reduce (IE9 and above)

If you don't need to support IE (only Edge), or can use a pre-compiler such as Babel you could use the more terse syntax.

const max = data.reduce((prev, current) => (prev.y > current.y) ? prev : current)

How to use SVN, Branch? Tag? Trunk?

As others have said, the SVN Book is the best place to start and a great reference once you've gotten your sea legs. Now, to your questions ...

How often do you commit? As often as one would press ctrl + s?

Often, but not as often as you press ctrl + s. It's a matter of personal taste and/or team policy. Personally I would say commit when you complete a functional piece of code, however small.

What is a Branch and what is a Tag and how do you control them?

First, trunk is where you do your active development. It is the mainline of your code. A branch is some deviation from the mainline. It could be a major deviation, like a previous release, or just a minor tweak you want to try out. A tag is a snapshot of your code. It's a way to attach a label or bookmark to a particular revision.

It's also worth mentioning that in subversion, trunk, branches and tags are only convention. Nothing stops you from doing work in tags or having branches that are your mainline, or disregarding the tag-branch-trunk scheme all together. But, unless you have a very good reason, it's best to stick with convention.

What goes into the SVN? Only Source Code or do you share other files here aswell?

Also a personal or team choice. I prefer to keep anything related to the build in my repository. That includes config files, build scripts, related media files, docs, etc. You should not check in files that need to be different on each developer's machine. Nor do you need to check in by-products of your code. I'm thinking mostly of build folders, object files, and the like.

Which version of CodeIgniter am I currently using?

You should try :

<?php
echo CI_VERSION;
?>

Or check the file system/core/CodeIgniter.php

How to test multiple variables against a value?

Without dict, try this solution:

x, y, z = 0, 1, 3    
offset = ord('c')
[chr(i + offset) for i in (x,y,z)]

and gives:

['c', 'd', 'f']

rsync error: failed to set times on "/foo/bar": Operation not permitted

The problem in my case was that the "receiver mountpoint" was incorrectly mounted. It was in read-only mode (for some extrange reason). It looked like rsync was copying the files, but it was not. I checked my fstab file and changed mount options to default, re-mount file system and execute rsync again. All fine then.

'pip' is not recognized as an internal or external command

For Mac, run the below command in a terminal window:

echo  export "PATH=$HOME/Library/Python/2.7/bin:$PATH"

CSS container div not getting height

It is not that easier?

.c {
    overflow: auto;
}

What is the meaning of "$" sign in JavaScript

In addition to the above answers, $ has no special meaning in javascript,it is free to be used in object naming. In jQuery, it is simply used as an alias for the jQuery object and jQuery() function. However, you may encounter situations where you want to use it in conjunction with another JS library that also uses $, which would result a naming conflict. There is a method in JQuery just for this reason, jQuery.noConflict().

Here is a sample from jQuery doc's:

<script src="other_lib.js"></script>
<script src="jquery.js"></script>
<script>
$.noConflict();
// Code that uses other library's $ can follow here.
</script>

Alternatively, you can also use a like this

(function ($) {
// Code in which we know exactly what the meaning of $ is
} (jQuery));

Ref:https://api.jquery.com/jquery.noconflict/

gpg: no valid OpenPGP data found

export https_proxy=http://user:pswd@host:port
                   ^^^^

Use http for https_proxy instead of https

What's the difference between next() and nextLine() methods from Scanner class?

What I have noticed apart from next() scans only upto space where as nextLine() scans the entire line is that next waits till it gets a complete token where as nextLine() does not wait for complete token, when ever '\n' is obtained(i.e when you press enter key) the scanner cursor moves to the next line and returns the previous line skipped. It does not check for the whether you have given complete input or not, even it will take an empty string where as next() does not take empty string

public class ScannerTest {

    public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);
        int cases = sc.nextInt();
        String []str = new String[cases];
        for(int i=0;i<cases;i++){
            str[i]=sc.next();
        }
     }

}

Try this program by changing the next() and nextLine() in for loop, go on pressing '\n' that is enter key without any input, you can find that using nextLine() method it terminates after pressing given number of cases where as next() doesnot terminate untill you provide and input to it for the given number of cases.

RunAs A different user when debugging in Visual Studio

This works (I feel so idiotic):

C:\Windows\System32\cmd.exe /C runas /savecred /user:OtherUser DebugTarget.Exe

The above command will ask for your password everytime, so for less frustration, you can use /savecred. You get asked only once. (but works only for Home Edition and Starter, I think)

Use own username/password with git and bitbucket

The prompt:

Password for 'https://[email protected]':

suggests, that you are using https not ssh. SSH urls start with git@, for example:

[email protected]:beginninggit/alias.git

Even if you work alone, with a single repo that you own, the operation:

git push

will cause:

Password for 'https://[email protected]':

if the remote origin starts with https.

Check your remote with:

git remote -v

The remote depends on git clone. If you want to use ssh clone the repo using its ssh url, for example:

git clone [email protected]:user/repo.git

I suggest you to start with git push and git pull for your private repo.

If that works, you have two joices suggested by Lazy Badger:

Pull requests
Team work

Using ConfigurationManager to load config from an arbitrary location

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

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

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

Video streaming over websockets using JavaScript

Is WebSockets over TCP a fast enough protocol to stream a video of, say, 30fps?

Yes.. it is, take a look at this project. Websockets can easily handle HD videostreaming.. However, you should go for Adaptive Streaming. I explain here how you could implement it.

Currently we're working on a webbased instant messaging application with chat, filesharing and video/webcam support. With some bits and tricks we got streaming media through websockets (used HTML5 Media Capture to get the stream from our webcams).

You need to build a stream API and a Media Stream Transceiver to control the related media processing and transport.

jQuery first child of "this"

If you want immediate first child you need

    $(element).first();

If you want particular first element in the dom from your element then use below

    var spanElement = $(elementId).find(".redClass :first");
    $(spanElement).addClass("yourClassHere");

try out : http://jsfiddle.net/vgGbc/2/

npm not working after clearing cache

Try npm cache clean --force if it doesn't work then manually delete %appdata%\npm-cache folder.

and install npm install npm@latest -g

It worked for me.

visit this link

How to change Named Range Scope

The code of JS20'07'11 is really incredible simple and direct. One suggestion that I would like to give is to put a exclamation mark in the conditions:

InStr(1, objName.RefersTo, sWsName+"!", vbTextCompare)

Because this will prevent adding a NamedRange in an incorrect Sheet. Eg: If the NamedRange refers to a Sheet named Plan11 and you have another Sheet named Plan1 the code can do some mess when add the ranges if you don't use the exclamation mark.

UPDATE

A correction: It's best to use a regular expression evaluate the name of the Sheet. A simple function that you can use is the following (adapted by http://blog.malcolmp.com/2010/regular-expressions-excel-add-in, enable Microsoft VBScript Regular Expressions 5.5):

Function xMatch(pattern As String, searchText As String, Optional matchIndex As Integer = 1, Optional ignoreCase As Boolean = True) As String
On Error Resume Next
Dim RegEx As New RegExp
RegEx.Global = True
RegEx.MultiLine = True
RegEx.pattern = pattern
RegEx.ignoreCase = ignoreCase
Dim matches As MatchCollection
Set matches = RegEx.Execute(searchText)
Dim i As Integer
i = 1
For Each Match In matches
    If i = matchIndex Then
        xMatch = Match.Value
    End If
    i = i + 1
Next
End Function

So, You can use something like that:

xMatch("'?" +sWsName + "'?" + "!", objName.RefersTo, 1) <> ""

instead of

InStr(1, objName.RefersTo, sWsName+"!", vbTextCompare)

This will cover Plan1 and 'Plan1' (when the range refers to more than one cell) variations

TIP: Avoid Sheet names with single quotes ('), :) .

Hibernate: hbm2ddl.auto=update in production?

It's not safe, not recommended, but it's possible.

I have experience in an application using the auto-update option in production.

Well, the main problems and risks found in this solution are:

Deploy in the wrong database. If you commit the mistake to run the application server with a old version of the application (EAR/WAR/etc) in the wrong database... You will have a lot of new columns, tables, foreign keys and errors. The same problem can occur with a simple mistake in the datasource file, (copy/paste file and forgot to change the database). In resume, the situation can be a disaster in your database.
Application server takes too long to start. This occur because the Hibernate try to find all created tables/columns/etc every time you start the application. He needs to know what (table, column, etc) needs to be created. This problem will only gets worse as the database tables grows up.
Database tools it's almost impossible to use. To create database DDL or DML scripts to run with a new version, you need to think about what will be created by the auto-update after you start the application server. Per example, If you need to fill a new column with some data, you need to start the application server, wait to Hibernate crete the new column and run the SQL script only after that. As can you see, database migration tools (like Flyway, Liquibase, etc) it's almost impossible to use with auto-update enabled.
Database changes is not centralized. With the possibility of the Hibernate create tables and everything else, it's hard to watch the changes on database in each version of the application, because most of them are made automatically.
Encourages garbage on database. Because of the "easy" use of auto-update, there is a chance your team neglecting to drop old columns and old tables, because the hibernate auto-update can't do that.
Imminent disaster. The imminent risk of some disaster to occur in production (like some people mentioned in other answers). Even with an application running and being updated for years, I don't think it's a safe choice. I never felt safe with this option being used.

So, I will not recommend to use auto-update in production.

If you really want to use auto-update in production, I recommend:

Separated networks. Your test environment cannot access the homolog environment. This helps prevent a deployment that was supposed to be in the Test environment change the Homologation database.
Manage scripts order. You need to organize your scripts to run before your deploy (structure table change, drop table/columns) and script after the deploy (fill information for the new columns/tables).

And, different of the another posts, I don't think the auto-update enabled it's related with "very well paid" DBAs (as mentioned in other posts). DBAs have more important things to do than write SQL statements to create/change/delete tables and columns. These simple everyday tasks can be done and automated by developers and only passed for DBA team to review, not needing Hibernate and DBAs "very well paid" to write them.

Making Enter key on an HTML form submit instead of activating button

You don't need JavaScript to choose your default submit button or input. You just need to mark it up with type="submit", and the other buttons mark them with type="button". In your example:

<button type="button" onclick="return myFunc1()">Button 1</button>
<input type="submit" name="go" value="Submit"/>

shorthand If Statements: C#

Yes. Use the ternary operator.

condition ? true_expression : false_expression;

Installing Git on Eclipse

Try with this link: http://download.eclipse.org/egit/github/updates

1)Go to Help-> Install new Software

2)Click on Add...

3)Name: eGit Location:http://download.eclipse.org/egit/github/updates

4)Click on OK

5)Accept the licence.

You are good to go

Passing parameter to controller action from a Html.ActionLink

Addition to the accepted answer:

if you are going to use

 @Html.ActionLink("LinkName", "ActionName", "ControllerName", new { @id = idValue, @secondParam= = 2 },null)

this will create actionlink where you can't create new custom attribute or style for the link.

However, the 4th parameter in ActionLink extension will solve that problem. Use the 4th parameter for customization in your way.

 @Html.ActionLink("LinkName", "ActionName", "ControllerName", new { @id = idValue, @secondParam= = 2 }, new { @class = "btn btn-info", @target = "_blank" })

Updating the list view when the adapter data changes

substitute:

mMyListView.invalidate();

for:

((BaseAdapter) mMyListView.getAdapter()).notifyDataSetChanged();

If that doesnt work, refer to this thread: Android List view refresh

Decimal values in SQL for dividing results

There may be other ways to get your desired result.

Declare @a int
Declare @b int
SET @a = 3
SET @b=2
SELECT cast((cast(@a as float)/ cast(@b as float)) as float)

How to print spaces in Python?

Here's a short answer

x=' ';

This will print one white space

print(x);

This will print 10 white spaces

print(10*x)

Print 10 whites spaces between Hello & World

print("Hello"+10*x+"world");

jquery - How to determine if a div changes its height or any css attribute?

Another simple example.

For this sample we can use 100x100 DIV-box:

<div id="box" style="width: 100px; height: 100px; border: solid 1px red;">
 // Red box contents here...
</div>

And small jQuery trick:

<script type="text/javascript">
  jQuery("#box").bind("resize", function() {
    alert("Box was resized from 100x100 to 200x200");
  });
  jQuery("#box").width(200).height(200).trigger("resize");
</script>

Steps:

We created DIV block element for resizing operatios
Add simple JavaScript code with:
- jQuery bind
- jQuery resizer with trigger action "resize" - trigger is most important thing in my example
After resize you can check the browser alert information

That's all. ;-)

How to use a WSDL file to create a WCF service (not make a call)

Using the "Add Service Reference" tool in Visual Studio, you can insert the address as:

file:///path/to/wsdl/file.wsdl

And it will load properly.

Set color of text in a Textbox/Label to Red and make it bold in asp.net C#

TextBox1.ForeColor = Color.Red;
TextBox1.Font.Bold = True;

Or this can be done using a CssClass (recommended):

.highlight
{
  color:red;
  font-weight:bold;
}

TextBox1.CssClass = "highlight";

Or the styles can be added inline:

TextBox1.Attributes["style"] = "color:red; font-weight:bold;";

How to create Select List for Country and States/province in MVC

So many ways to do this... for #NetCore use Lib..

    using System;
    using System.Collections.Generic;
    using System.Linq; // only required when .AsEnumerable() is used
    using System.ComponentModel.DataAnnotations;
    using Microsoft.AspNetCore.Mvc.Rendering;

Model...

namespace MyProject.Models
{
  public class MyModel
  {
    [Required]
    [Display(Name = "State")]
    public string StatePick { get; set; }
    public string state { get; set; }
    [StringLength(35, ErrorMessage = "State cannot be longer than 35 characters.")]
    public SelectList StateList { get; set; }
  }
}

Controller...

namespace MyProject.Controllers
{
    /// <summary>
    /// create SelectListItem from strings
    /// </summary>
    /// <param name="isValue">defaultValue is SelectListItem.Value is true, SelectListItem.Text if false</param>
    /// <returns></returns>
    private SelectListItem newItem(string value, string text, string defaultValue = "", bool isValue = false)
    {
        SelectListItem ss = new SelectListItem();
        ss.Text = text;
        ss.Value = value;

        // select default by Value or Text
        if (isValue && ss.Value == defaultValue || !isValue && ss.Text == defaultValue)
        {
            ss.Selected = true;
        }

        return ss;
    }

    /// <summary>
    /// this pulls the state name from _context and sets it as the default for the selectList
    /// </summary>
    /// <param name="myState">sets default value for list of states</param>
    /// <returns></returns>
    private SelectList getStateList(string myState = "")
    {
        List<SelectListItem> states = new List<SelectListItem>();
        SelectListItem chosen = new SelectListItem();

        // set default selected state to OHIO
        string defaultValue = "OH";
        if (!string.IsNullOrEmpty(myState))
        {
            defaultValue = myState;
        }

        try
        {
            states.Add(newItem("AL", "Alabama", defaultValue, true));
            states.Add(newItem("AK", "Alaska", defaultValue, true));
            states.Add(newItem("AZ", "Arizona", defaultValue, true));
            states.Add(newItem("AR", "Arkansas", defaultValue, true));
            states.Add(newItem("CA", "California", defaultValue, true));
            states.Add(newItem("CO", "Colorado", defaultValue, true));
            states.Add(newItem("CT", "Connecticut", defaultValue, true));
            states.Add(newItem("DE", "Delaware", defaultValue, true));
            states.Add(newItem("DC", "District of Columbia", defaultValue, true));
            states.Add(newItem("FL", "Florida", defaultValue, true));
            states.Add(newItem("GA", "Georgia", defaultValue, true));
            states.Add(newItem("HI", "Hawaii", defaultValue, true));
            states.Add(newItem("ID", "Idaho", defaultValue, true));
            states.Add(newItem("IL", "Illinois", defaultValue, true));
            states.Add(newItem("IN", "Indiana", defaultValue, true));
            states.Add(newItem("IA", "Iowa", defaultValue, true));
            states.Add(newItem("KS", "Kansas", defaultValue, true));
            states.Add(newItem("KY", "Kentucky", defaultValue, true));
            states.Add(newItem("LA", "Louisiana", defaultValue, true));
            states.Add(newItem("ME", "Maine", defaultValue, true));
            states.Add(newItem("MD", "Maryland", defaultValue, true));
            states.Add(newItem("MA", "Massachusetts", defaultValue, true));
            states.Add(newItem("MI", "Michigan", defaultValue, true));
            states.Add(newItem("MN", "Minnesota", defaultValue, true));
            states.Add(newItem("MS", "Mississippi", defaultValue, true));
            states.Add(newItem("MO", "Missouri", defaultValue, true));
            states.Add(newItem("MT", "Montana", defaultValue, true));
            states.Add(newItem("NE", "Nebraska", defaultValue, true));
            states.Add(newItem("NV", "Nevada", defaultValue, true));
            states.Add(newItem("NH", "New Hampshire", defaultValue, true));
            states.Add(newItem("NJ", "New Jersey", defaultValue, true));
            states.Add(newItem("NM", "New Mexico", defaultValue, true));
            states.Add(newItem("NY", "New York", defaultValue, true));
            states.Add(newItem("NC", "North Carolina", defaultValue, true));
            states.Add(newItem("ND", "North Dakota", defaultValue, true));
            states.Add(newItem("OH", "Ohio", defaultValue, true));
            states.Add(newItem("OK", "Oklahoma", defaultValue, true));
            states.Add(newItem("OR", "Oregon", defaultValue, true));
            states.Add(newItem("PA", "Pennsylvania", defaultValue, true));
            states.Add(newItem("RI", "Rhode Island", defaultValue, true));
            states.Add(newItem("SC", "South Carolina", defaultValue, true));
            states.Add(newItem("SD", "South Dakota", defaultValue, true));
            states.Add(newItem("TN", "Tennessee", defaultValue, true));
            states.Add(newItem("TX", "Texas", defaultValue, true));
            states.Add(newItem("UT", "Utah", defaultValue, true));
            states.Add(newItem("VT", "Vermont", defaultValue, true));
            states.Add(newItem("VA", "Virginia", defaultValue, true));
            states.Add(newItem("WA", "Washington", defaultValue, true));
            states.Add(newItem("WV", "West Virginia", defaultValue, true));
            states.Add(newItem("WI", "Wisconsin", defaultValue, true));
            states.Add(newItem("WY", "Wyoming", defaultValue, true));

            foreach (SelectListItem state in states)
            {
                if (state.Selected)
                {
                    chosen = state;
                    break;
                }
            }
        }
        catch (Exception err)
        {
            string ss = "ERR!   " + err.Source + "   " + err.GetType().ToString() + "\r\n" + err.Message.Replace("\r\n", "   ");
            ss = this.sendError("Online getStateList Request", ss, _errPassword);
            // return error
        }

        // .AsEnumerable() is not required in the pass.. it is an extension of Linq
        SelectList myList = new SelectList(states.AsEnumerable(), "Value", "Text", chosen);

        object val = myList.SelectedValue;

        return myList;
    }

    public ActionResult pickState(MyModel pData)
    {
        if (pData.StateList == null)
        {
            if (String.IsNullOrEmpty(pData.StatePick)) // state abbrev, value collected onchange
            {
                pData.StateList = getStateList();
            }
            else
            {
                pData.StateList = getStateList(pData.StatePick);
            }

            // assign values to state list items
            try
            {
                SelectListItem si = (SelectListItem)pData.StateList.SelectedValue;
                pData.state = si.Value;
                pData.StatePick = si.Value;
            }
            catch { }
        } 
    return View(pData);
    }
}

pickState.cshtml...

@model MyProject.Models.MyModel

@{
ViewBag.Title = "United States of America";
Layout = "~/Views/Shared/_Layout.cshtml";
}
<h2>@ViewBag.Title - Where are you...</h2>

@using (Html.BeginForm()) {
@Html.AntiForgeryToken()
@Html.ValidationSummary(true)

<fieldset>

    <div class="editor-label">
        @Html.DisplayNameFor(model => model.state)
    </div>
    <div class="display-field">            
        @Html.DropDownListFor(m => m.StatePick, Model.StateList, new { OnChange = "state.value = this.value;" })
        @Html.EditorFor(model => model.state)
        @Html.ValidationMessageFor(model => model.StateList)
    </div>         
</fieldset>
}

<div>
@Html.ActionLink("Back to List", "Index")
</div>

What is dynamic programming?

I am also very much new to Dynamic Programming (a powerful algorithm for particular type of problems)

In most simple words, just think dynamic programming as a recursive approach with using the previous knowledge

Previous knowledge is what matters here the most, Keep track of the solution of the sub-problems you already have.

Consider this, most basic example for dp from Wikipedia

Finding the fibonacci sequence

function fib(n)   // naive implementation
    if n <=1 return n
    return fib(n - 1) + fib(n - 2)

Lets break down the function call with say n = 5

fib(5)
fib(4) + fib(3)
(fib(3) + fib(2)) + (fib(2) + fib(1))
((fib(2) + fib(1)) + (fib(1) + fib(0))) + ((fib(1) + fib(0)) + fib(1))
(((fib(1) + fib(0)) + fib(1)) + (fib(1) + fib(0))) + ((fib(1) + fib(0)) + fib(1))

In particular, fib(2) was calculated three times from scratch. In larger examples, many more values of fib, or sub-problems, are recalculated, leading to an exponential time algorithm.

Now, lets try it by storing the value we already found out in a data-structure say a Map

var m := map(0 ? 0, 1 ? 1)
function fib(n)
    if key n is not in map m 
        m[n] := fib(n - 1) + fib(n - 2)
    return m[n]

Here we are saving the solution of sub-problems in the map, if we don't have it already. This technique of saving values which we already had calculated is termed as Memoization.

At last, For a problem, first try to find the states (possible sub-problems and try to think of the better recursion approach so that you can use the solution of previous sub-problem into further ones).

Convert NULL to empty string - Conversion failed when converting from a character string to uniqueidentifier

SELECT Id   'PatientId',
       ISNULL(CONVERT(varchar(50),ParentId),'')  'ParentId'
FROM Patients

ISNULL always tries to return a result that has the same data type as the type of its first argument. So, if you want the result to be a string (varchar), you'd best make sure that's the type of the first argument.

COALESCE is usually a better function to use than ISNULL, since it considers all argument data types and applies appropriate precedence rules to determine the final resulting data type. Unfortunately, in this case, uniqueidentifier has higher precedence than varchar, so that doesn't help.

(It's also generally preferred because it extends to more than two arguments)

How to convert number of minutes to hh:mm format in TSQL?

declare function dbo.minutes2hours (
    @minutes int
)
RETURNS varchar(10)
as
begin
    return format(dateadd(minute,@minutes,'00:00:00'), N'HH\:mm','FR-fr')
end

decompiling DEX into Java sourcecode

Android Reverse Engineering is possible . Follow these steps to get .java file from apk file.

Step1 . Using dex2jar

Generate .jar file from .apk file
command : dex2jar sampleApp.apk

Step2 . Decompiling .jar using JD-GUI

it decompiles the .class files i.e., we'll get obfuscated .java back from the apk.

How to remove all namespaces from XML with C#?

I know this question is supposedly solved, but I wasn't totally happy with the way it was implemented. I found another source over here on the MSDN blogs that has an overridden XmlTextWriter class that strips out the namespaces. I tweaked it a bit to get some other things I wanted in such as pretty formatting and preserving the root element. Here is what I have in my project at the moment.

http://blogs.msdn.com/b/kaevans/archive/2004/08/02/206432.aspx

Class

/// <summary>
/// Modified XML writer that writes (almost) no namespaces out with pretty formatting
/// </summary>
/// <seealso cref="http://blogs.msdn.com/b/kaevans/archive/2004/08/02/206432.aspx"/>
public class XmlNoNamespaceWriter : XmlTextWriter
{
    private bool _SkipAttribute = false;
    private int _EncounteredNamespaceCount = 0;

    public XmlNoNamespaceWriter(TextWriter writer)
        : base(writer)
    {
        this.Formatting = System.Xml.Formatting.Indented;
    }

    public override void WriteStartElement(string prefix, string localName, string ns)
    {
        base.WriteStartElement(null, localName, null);
    }

    public override void WriteStartAttribute(string prefix, string localName, string ns)
    {
        //If the prefix or localname are "xmlns", don't write it.
        //HOWEVER... if the 1st element (root?) has a namespace we will write it.
        if ((prefix.CompareTo("xmlns") == 0
                || localName.CompareTo("xmlns") == 0)
            && _EncounteredNamespaceCount++ > 0)
        {
            _SkipAttribute = true;
        }
        else
        {
            base.WriteStartAttribute(null, localName, null);
        }
    }

    public override void WriteString(string text)
    {
        //If we are writing an attribute, the text for the xmlns
        //or xmlns:prefix declaration would occur here.  Skip
        //it if this is the case.
        if (!_SkipAttribute)
        {
            base.WriteString(text);
        }
    }

    public override void WriteEndAttribute()
    {
        //If we skipped the WriteStartAttribute call, we have to
        //skip the WriteEndAttribute call as well or else the XmlWriter
        //will have an invalid state.
        if (!_SkipAttribute)
        {
            base.WriteEndAttribute();
        }
        //reset the boolean for the next attribute.
        _SkipAttribute = false;
    }

    public override void WriteQualifiedName(string localName, string ns)
    {
        //Always write the qualified name using only the
        //localname.
        base.WriteQualifiedName(localName, null);
    }
}

Usage

//Save the updated document using our modified (almost) no-namespace XML writer
using(StreamWriter sw = new StreamWriter(this.XmlDocumentPath))
using(XmlNoNamespaceWriter xw = new XmlNoNamespaceWriter(sw))
{
    //This variable is of type `XmlDocument`
    this.XmlDocumentRoot.Save(xw);
}

How to delete SQLite database from Android programmatically

Once you have your Context and know the name of the database, use:

context.deleteDatabase(DATABASE_NAME);

When this line gets run, the database should be deleted.

How to split a file into equal parts, without breaking individual lines?

The script isn't even necessary, split(1) supports the wanted feature out of the box:
split -l 75 auth.log auth.log. The above command splits the file in chunks of 75 lines a piece, and outputs file on the form: auth.log.aa, auth.log.ab, ...

wc -l on the original file and output gives:

  321 auth.log
   75 auth.log.aa
   75 auth.log.ab
   75 auth.log.ac
   75 auth.log.ad
   21 auth.log.ae
  642 total

How to remove duplicate values from an array in PHP

<?php
$a=array("1"=>"302","2"=>"302","3"=>"276","4"=>"301","5"=>"302");
print_r(array_values(array_unique($a)));
?>//`output -> Array ( [0] => 302 [1] => 276 [2] => 301 )`

What is the difference between spark.sql.shuffle.partitions and spark.default.parallelism?

spark.default.parallelism is the default number of partition set by spark which is by default 200. and if you want to increase the number of partition than you can apply the property spark.sql.shuffle.partitions to set number of partition in the spark configuration or while running spark SQL.

Normally this spark.sql.shuffle.partitions it is being used when we have a memory congestion and we see below error: spark error:java.lang.IllegalArgumentException: Size exceeds Integer.MAX_VALUE

so set your can allocate a partition as 256 MB per partition and that you can use to set for your processes.

also If number of partitions is near to 2000 then increase it to more than 2000. As spark applies different logic for partition < 2000 and > 2000 which will increase your code performance by decreasing the memory footprint as data default is highly compressed if >2000.

Java regex email

Regex : ^[\\w!#$%&’*+/=?{|}~^-]+(?:\.[\w!#$%&’*+/=?{|}~^-]+)*@(?:[a-zA-Z0-9-]+\\.)+[a-zA-Z]{2,6}$

public static boolean isValidEmailId(String email) {
        String emailPattern = "^[\\w!#$%&’*+/=?`{|}~^-]+(?:\\.[\\w!#$%&’*+/=?`{|}~^-]+)*@(?:[a-zA-Z0-9-]+\\.)+[a-zA-Z]{2,6}$";
        Pattern p = Pattern.compile(emailPattern);
        Matcher m = p.matcher(email);
        return m.matches();
    }

Java: How To Call Non Static Method From Main Method?

You can't call a non-static method from a static method, because the definition of "non-static" means something that is associated with an instance of the class. You don't have an instance of the class in a static context.

Unable to establish SSL connection upon wget on Ubuntu 14.04 LTS

If you trust the host, either add the valid certificate, specify --no-check-certificate or add:

check_certificate = off

into your ~/.wgetrc.

In some rare cases, your system time could be out-of-sync therefore invalidating the certificates.

How to output oracle sql result into a file in windows?

spool "D:\test\test.txt"

select  
  a.ename  
from  
  employee a  
inner join department b  
on  
(  
  a.dept_id = b.dept_id  
)  
;  
spool off

This query will spool the sql result in D:\test\test.txt

How to clear basic authentication details in chrome

Shortest way: Click lock icon in address bar. Then click Site settings, then click Reset permissions

What is the 'dynamic' type in C# 4.0 used for?

The best use case of 'dynamic' type variables for me was when, recently, I was writing a data access layer in ADO.NET (using SQLDataReader) and the code was invoking the already written legacy stored procedures. There are hundreds of those legacy stored procedures containing bulk of the business logic. My data access layer needed to return some sort of structured data to the business logic layer, C# based, to do some manipulations (although there are almost none). Every stored procedures returns different set of data (table columns). So instead of creating dozens of classes or structs to hold the returned data and pass it to the BLL, I wrote the below code which looks quite elegant and neat.

public static dynamic GetSomeData(ParameterDTO dto)
        {
            dynamic result = null;
            string SPName = "a_legacy_stored_procedure";
            using (SqlConnection connection = new SqlConnection(DataConnection.ConnectionString))
            {
                SqlCommand command = new SqlCommand(SPName, connection);
                command.CommandType = System.Data.CommandType.StoredProcedure;                
                command.Parameters.Add(new SqlParameter("@empid", dto.EmpID));
                command.Parameters.Add(new SqlParameter("@deptid", dto.DeptID));
                connection.Open();
                using (SqlDataReader reader = command.ExecuteReader())
                {
                    while (reader.Read())
                    {
                        dynamic row = new ExpandoObject();
                        row.EmpName = reader["EmpFullName"].ToString();
                        row.DeptName = reader["DeptName"].ToString();
                        row.AnotherColumn = reader["AnotherColumn"].ToString();                        
                        result = row;
                    }
                }
            }
            return result;
        }

Pass arguments to Constructor in VBA

I use one Factory module that contains one (or more) constructor per class which calls the Init member of each class.

For example a Point class:

Class Point
Private X, Y
Sub Init(X, Y)
  Me.X = X
  Me.Y = Y
End Sub

A Line class

Class Line
Private P1, P2
Sub Init(Optional P1, Optional P2, Optional X1, Optional X2, Optional Y1, Optional Y2)
  If P1 Is Nothing Then
    Set Me.P1 = NewPoint(X1, Y1)
    Set Me.P2 = NewPoint(X2, Y2)
  Else
    Set Me.P1 = P1
    Set Me.P2 = P2
  End If
End Sub

And a Factory module:

Module Factory
Function NewPoint(X, Y)
  Set NewPoint = New Point
  NewPoint.Init X, Y
End Function

Function NewLine(Optional P1, Optional P2, Optional X1, Optional X2, Optional Y1, Optional Y2)
  Set NewLine = New Line
  NewLine.Init P1, P2, X1, Y1, X2, Y2
End Function

Function NewLinePt(P1, P2)
  Set NewLinePt = New Line
  NewLinePt.Init P1:=P1, P2:=P2
End Function

Function NewLineXY(X1, Y1, X2, Y2)
  Set NewLineXY = New Line
  NewLineXY.Init X1:=X1, Y1:=Y1, X2:=X2, Y2:=Y2
End Function

One nice aspect of this approach is that makes it easy to use the factory functions inside expressions. For example it is possible to do something like:

D = Distance(NewPoint(10, 10), NewPoint(20, 20)

or:

D = NewPoint(10, 10).Distance(NewPoint(20, 20))

It's clean: the factory does very little and it does it consistently across all objects, just the creation and one Init call on each creator.

And it's fairly object oriented: the Init functions are defined inside the objects.

EDIT

I forgot to add that this allows me to create static methods. For example I can do something like (after making the parameters optional):

NewLine.DeleteAllLinesShorterThan 10

Unfortunately a new instance of the object is created every time, so any static variable will be lost after the execution. The collection of lines and any other static variable used in this pseudo-static method must be defined in a module.

Percentage Height HTML 5/CSS

bobince's answer will let you know in which cases "height: XX%;" will or won't work.

If you want to create an element with a set ratio (height: % of it's own width), the best way to do that is by effectively setting the height using padding-bottom. Example for square:

<div class="square-container">
  <div class="square-content">
    <!-- put your content in here -->
  </div>
</div>

.square-container {  /* any display: block; element */
  position: relative;
  height: 0;
  padding-bottom: 100%; /* of parent width */
}
.square-content {
  position: absolute;
  left: 0;
  top: 0;
  height: 100%;
  width: 100%;
}

The square container will just be made of padding, and the content will expand to fill the container. Long article from 2009 on this subject: http://alistapart.com/article/creating-intrinsic-ratios-for-video

How do I use HTML as the view engine in Express?

I recommend using https://www.npmjs.com/package/express-es6-template-engine - extremely lightwave and blazingly fast template engine. The name is a bit misleading as it can work without expressjs too.

The basics required to integrate express-es6-template-engine in your app are pretty simple and quite straight forward to implement:

_x000D_

const express = require('express'),_x000D_
  es6Renderer = require('express-es6-template-engine'),_x000D_
  app = express();_x000D_
  _x000D_
app.engine('html', es6Renderer);_x000D_
app.set('views', 'views');_x000D_
app.set('view engine', 'html');_x000D_
 _x000D_
app.get('/', function(req, res) {_x000D_
  res.render('index', {locals: {title: 'Welcome!'}});_x000D_
});_x000D_
 _x000D_
app.listen(3000);

_x000D_

_x000D_ Here is the content of the index.html file locate inside your 'views' directory:

<!DOCTYPE html>
<html>
<body>
    <h1>${title}</h1>
</body>
</html>

Why does JPA have a @Transient annotation?

For Kotlin developers, remember the Java transient keyword becomes the built-in Kotlin @Transient annotation. Therefore, make sure you have the JPA import if you're using JPA @Transient in your entity:

import javax.persistence.Transient

Installing Apache Maven Plugin for Eclipse

Eclipse > Help > Eclipse Marketplace...

Search for m2e

Install Maven Integration for Eclipse (Juno and newer). [It works for Indigo also]

Property getters and setters

Update: Swift 4

In the below class setter and getter is applied to variable sideLength

class Triangle: {
    var sideLength: Double = 0.0

    init(sideLength: Double, name: String) { //initializer method
        self.sideLength = sideLength
        super.init(name: name)
        numberOfSides = 3
    }

    var perimeter: Double {
        get { // getter
            return 3.0 * sideLength
        }
        set(newValue) { //setter
            sideLength = newValue / 4.0
        }
   }

Creating object

var triangle = Triangle(sideLength: 3.9, name: "a triangle")

Getter

print(triangle.perimeter) // invoking getter

Setter

triangle.perimeter = 9.9 // invoking setter

Implementing IDisposable correctly

The following example shows the general best practice to implement IDisposable interface. Reference

Keep in mind that you need a destructor(finalizer) only if you have unmanaged resources in your class. And if you add a destructor you should suppress Finalization in the Dispose, otherwise it will cause your objects resides in memory for two garbage cycles (Note: Read how Finalization works). Below example elaborate all above.

public class DisposeExample
{
    // A base class that implements IDisposable. 
    // By implementing IDisposable, you are announcing that 
    // instances of this type allocate scarce resources. 
    public class MyResource: IDisposable
    {
        // Pointer to an external unmanaged resource. 
        private IntPtr handle;
        // Other managed resource this class uses. 
        private Component component = new Component();
        // Track whether Dispose has been called. 
        private bool disposed = false;

        // The class constructor. 
        public MyResource(IntPtr handle)
        {
            this.handle = handle;
        }

        // Implement IDisposable. 
        // Do not make this method virtual. 
        // A derived class should not be able to override this method. 
        public void Dispose()
        {
            Dispose(true);
            // This object will be cleaned up by the Dispose method. 
            // Therefore, you should call GC.SupressFinalize to 
            // take this object off the finalization queue 
            // and prevent finalization code for this object 
            // from executing a second time.
            GC.SuppressFinalize(this);
        }

        // Dispose(bool disposing) executes in two distinct scenarios. 
        // If disposing equals true, the method has been called directly 
        // or indirectly by a user's code. Managed and unmanaged resources 
        // can be disposed. 
        // If disposing equals false, the method has been called by the 
        // runtime from inside the finalizer and you should not reference 
        // other objects. Only unmanaged resources can be disposed. 
        protected virtual void Dispose(bool disposing)
        {
            // Check to see if Dispose has already been called. 
            if(!this.disposed)
            {
                // If disposing equals true, dispose all managed 
                // and unmanaged resources. 
                if(disposing)
                {
                    // Dispose managed resources.
                    component.Dispose();
                }

                // Call the appropriate methods to clean up 
                // unmanaged resources here. 
                // If disposing is false, 
                // only the following code is executed.
                CloseHandle(handle);
                handle = IntPtr.Zero;

                // Note disposing has been done.
                disposed = true;

            }
        }

        // Use interop to call the method necessary 
        // to clean up the unmanaged resource.
        [System.Runtime.InteropServices.DllImport("Kernel32")]
        private extern static Boolean CloseHandle(IntPtr handle);

        // Use C# destructor syntax for finalization code. 
        // This destructor will run only if the Dispose method 
        // does not get called. 
        // It gives your base class the opportunity to finalize. 
        // Do not provide destructors in types derived from this class.
        ~MyResource()
        {
            // Do not re-create Dispose clean-up code here. 
            // Calling Dispose(false) is optimal in terms of 
            // readability and maintainability.
            Dispose(false);
        }
    }
    public static void Main()
    {
        // Insert code here to create 
        // and use the MyResource object.
    }
}

Shell Script — Get all files modified after <date>

You can get a list of files last modified later than x days ago with:

find . -mtime -x

Then you just have to tar and zip files in the resulting list, e.g.:

tar czvf mytarfile.tgz `find . -mtime -30`

for all files modified during last month.

How to read input with multiple lines in Java

 public class Sol {

   public static void main(String[] args) {

   Scanner sc = new Scanner(System.in); 

   while(sc.hasNextLine()){

   System.out.println(sc.nextLine());

  }
 }
}

Can I use CASE statement in a JOIN condition?

A CASE expression returns a value from the THEN portion of the clause. You could use it thusly:

SELECT  * 
FROM    sys.indexes i 
    JOIN sys.partitions p 
        ON i.index_id = p.index_id  
    JOIN sys.allocation_units a 
        ON CASE 
           WHEN a.type IN (1, 3) AND a.container_id = p.hobt_id THEN 1
           WHEN a.type IN (2) AND a.container_id = p.partition_id THEN 1
           ELSE 0
           END = 1

Note that you need to do something with the returned value, e.g. compare it to 1. Your statement attempted to return the value of an assignment or test for equality, neither of which make sense in the context of a CASE/THEN clause. (If BOOLEAN was a datatype then the test for equality would make sense.)

Posting JSON Data to ASP.NET MVC

BeRecursive's answer is the one I used, so that we could standardize on Json.Net (we have MVC5 and WebApi 5 -- WebApi 5 already uses Json.Net), but I found an issue. When you have parameters in your route to which you're POSTing, MVC tries to call the model binder for the URI values, and this code will attempt to bind the posted JSON to those values.

Example:

[HttpPost]
[Route("Customer/{customerId:int}/Vehicle/{vehicleId:int}/Policy/Create"]
public async Task<JsonNetResult> Create(int customerId, int vehicleId, PolicyRequest policyRequest)

The BindModel function gets called three times, bombing on the first, as it tries to bind the JSON to customerId with the error: Error reading integer. Unexpected token: StartObject. Path '', line 1, position 1.

I added this block of code to the top of BindModel:

if (bindingContext.ValueProvider.GetValue(bindingContext.ModelName) != null) {
    return base.BindModel(controllerContext, bindingContext);
}

The ValueProvider, fortunately, has route values figured out by the time it gets to this method.

How to redirect verbose garbage collection output to a file?

If in addition you want to pipe the output to a separate file, you can do:

On a Sun JVM:

-Xloggc:C:\whereever\jvm.log -verbose:gc -XX:+PrintGCDateStamps

ON an IBM JVM:

-Xverbosegclog:C:\whereever\jvm.log

Differences between Lodash and Underscore.js

Underscore vs Lo-Dash by Ben McCormick is the latest article comparing the two:

Lodash's API is a superset of Underscore.js's.

Under the hood, Lodash has been completely rewritten.

Lodash is definitely not slower than Underscore.js.

What has Lodash added?

Usability improvements

Extra functionality

Performance gains

Shorthand syntaxes for chaining

Custom builds to only use what you need

Semantic versioning and 100% code coverage

How does `scp` differ from `rsync`?

There's a distinction to me that scp is always encrypted with ssh (secure shell), while rsync isn't necessarily encrypted. More specifically, rsync doesn't perform any encryption by itself; it's still capable of using other mechanisms (ssh for example) to perform encryption.

In addition to security, encryption also has a major impact on your transfer speed, as well as the CPU overhead. (My experience is that rsync can be significantly faster than scp.)

Check out this post for when rsync has encryption on.

What is a predicate in c#?

The following code can help you to understand some real world use of predicates (Combined with named iterators).

namespace Predicate
{
    class Person
    {
        public int Age { get; set; }
    }
    class Program
    {
        static void Main(string[] args)
        {
            foreach (Person person in OlderThan(18))
            {
                Console.WriteLine(person.Age);
            }
        }

        static IEnumerable<Person> OlderThan(int age)
        {
            Predicate<Person> isOld = x => x.Age > age;
            Person[] persons = { new Person { Age = 10 }, new Person { Age = 20 }, new Person { Age = 19 } };

            foreach (Person person in persons)
                if (isOld(person)) yield return person;
        }
    }
}

Code for best fit straight line of a scatter plot in python

A one-line version of this excellent answer to plot the line of best fit is:

plt.plot(np.unique(x), np.poly1d(np.polyfit(x, y, 1))(np.unique(x)))

Using np.unique(x) instead of x handles the case where x isn't sorted or has duplicate values.

Disable EditText blinking cursor

You can use following code for enabling and disabling edit text cursor by programmatically.

To Enable cursor

    editText.requestFocus();
    editText.setCursorVisible(true);

To Disable cursor

    editText.setCursorVisible(false);

Using XML enable disable cursor

   android:cursorVisible="false/true"
   android:focusable="false/true"

To make edit_text Selectable to (copy/cut/paste/select/select all)

   editText.setTextIsSelectable(true);

To focus on touch mode write following lines in XML

  android:focusableInTouchMode="true"
  android:clickable="true"
  android:focusable="true"

programmatically

  editText.requestFocusFromTouch();

To clear focus on touch mode

  editText.clearFocus()

Dark theme in Netbeans 7 or 8

There is no more plugin in netbeans 12. In case someone comes to this page. Tools->Options->Appearance->Look and feel->Flatlaf Dark

Java error: Comparison method violates its general contract

        if (card1.getRarity() < card2.getRarity()) {
            return 1;

However, if card2.getRarity() is less than card1.getRarity() you might not return -1.

You similarly miss other cases. I would do this, you can change around depending on your intent:

public int compareTo(Object o) {    
    if(this == o){
        return 0;
    }

    CollectionItem item = (CollectionItem) o;

    Card card1 = CardCache.getInstance().getCard(cardId);
    Card card2 = CardCache.getInstance().getCard(item.getCardId());
    int comp=card1.getSet() - card2.getSet();
    if (comp!=0){
        return comp;
    }
    comp=card1.getRarity() - card2.getRarity();
    if (comp!=0){
        return comp;
    }
    comp=card1.getSet() - card2.getSet();
    if (comp!=0){
        return comp;
    }   
    comp=card1.getId() - card2.getId();
    if (comp!=0){
        return comp;
    }   
    comp=card1.getCardType() - card2.getCardType();

    return comp;

    }
}

Overcoming "Display forbidden by X-Frame-Options"

<form target="_parent" ... />

Using Kevin Vella's idea, I tried using the above on the form element made by PayPal's button generator. Worked for me so that Paypal does not open in a new browser window/tab.

Update

Here's an example:

Generating a button as of today (01-19-2021), PayPal automatically includes target="_top" on the form element, but if that doesn't work for your context, try a different target value. I suggest _parent -- at least that worked when I was using this PayPal button.

See Form Target Values for more info.

<form action="https://www.paypal.com/cgi-bin/webscr" method="post" target="_parent">
  <input type="hidden" name="cmd" value="_xclick">
  <input type="hidden" name="business" value="[email protected]">
  <input type="hidden" name="lc" value="US">
  <input type="hidden" name="button_subtype" value="services">
  <input type="hidden" name="no_note" value="0">
  <input type="hidden" name="currency_code" value="USD">
  <input type="hidden" name="bn" value="PP-BuyNowBF:btn_buynowCC_LG.gif:NonHostedGuest">
  <input type="image" src="https://www.paypalobjects.com/en_US/i/btn/btn_buynowCC_LG.gif" border="0" name="submit" alt="PayPal - The safer, easier way to pay online!">
  <img alt="" border="0" src="https://www.paypalobjects.com/en_US/i/scr/pixel.gif" width="1" height="1">
</form>

jQuery UI Dialog OnBeforeUnload

this works for me

$(window).bind('beforeunload', function() {
      return 'Do you really want to leave?' ;
});

Using sed, how do you print the first 'N' characters of a line?

Strictly with sed:

grep ... | sed -e 's/^\(.\{N\}\).*$/\1/'

PHP DateTime __construct() Failed to parse time string (xxxxxxxx) at position x

change your code to this

$start_date = new DateTime( "@" . $dbResult->db_timestamp );

and it will work fine

How to make full screen background in a web page

Use the following code in your CSS

_x000D_

html { _x000D_
  background: url(images/bg.jpg) no-repeat center center fixed; _x000D_
  -webkit-background-size: cover;_x000D_
  -moz-background-size: cover;_x000D_
  -o-background-size: cover;_x000D_
  background-size: cover;_x000D_
}

_x000D_

_x000D_ here's the link where i found it:

How to create an integer-for-loop in Ruby?

x.times do |i|
    something(i+1)
end

How to get summary statistics by group

First, it depends on your version of R. If you've passed 2.11, you can use aggreggate with multiple results functions(summary, by instance, or your own function). If not, you can use the answer made by Justin.

Adding 30 minutes to time formatted as H:i in PHP

echo date( "Y-m-d H:i:s", strtotime("2016-10-10 15:00:00")+(60*30) );//2016-10-10 15:30:00

echo date( "H:i:s", strtotime("15:00:00")+(60*30) ); // 15:30:00

echo date( "H:i:s", strtotime(date("H:i:s"))+(60*30) ); // 15:30:00

What does 'low in coupling and high in cohesion' mean

In software design high cohesion means that class should do one thing and one thing very well. High cohesion is closely related to Single responsibility principle.

Low coupling suggest that class should have least possible dependencies. Also, dependencies that must exist should be weak dependencies - prefer dependency on interface rather than dependency on concrete class, or prefer composition over inheritance .

High Cohesion and low coupling give us better designed code that is easier to maintain.

Error : getaddrinfo ENOTFOUND registry.npmjs.org registry.npmjs.org:443

You can use this command

npm config delete proxy

It happens because formidable is prone to severity vulnerability. So, you need to override that by running the above command.

How long will my session last?

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

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

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

What is the reason for a red exclamation mark next to my project in Eclipse?

i was having the same problem....the actual issue was missing .jar file which took palce coz of changing my workspace. i just deleted the appcompat folder(which has the".jar" file) from my new workspace and copied it from my old workspace. this solved my problem.

How to regex in a MySQL query

In my case (Oracle), it's WHERE REGEXP_LIKE(column, 'regex.*'). See here:

SQL Function

Description

REGEXP_LIKE

This function searches a character column for a pattern. Use this function in the WHERE clause of a query to return rows matching the regular expression you specify.

...

REGEXP_REPLACE

This function searches for a pattern in a character column and replaces each occurrence of that pattern with the pattern you specify.

...

REGEXP_INSTR

This function searches a string for a given occurrence of a regular expression pattern. You specify which occurrence you want to find and the start position to search from. This function returns an integer indicating the position in the string where the match is found.

...

REGEXP_SUBSTR

This function returns the actual substring matching the regular expression pattern you specify.

(Of course, REGEXP_LIKE only matches queries containing the search string, so if you want a complete match, you'll have to use '^$' for a beginning (^) and end ($) match, e.g.: '^regex.*$'.)

How do I redirect users after submit button click?

Your submission will cancel the redirect or vice versa.

I do not see the reason for the redirect in the first place since why do you have an order form that does nothing.

That said, here is how to do it. Firstly NEVER put code on the submit button but do it in the onsubmit, secondly return false to stop the submission

NOTE This code will IGNORE the action and ONLY execute the script due to the return false/preventDefault

function redirect() {
  window.location.replace("login.php");
  return false;
}

using

<form name="form1" id="form1" method="post" onsubmit="return redirect()">  
  <input type="submit" class="button4" name="order" id="order" value="Place Order" >
</form>

Or unobtrusively:

window.onload=function() {
  document.getElementById("form1").onsubmit=function() {
    window.location.replace("login.php");
    return false;
  }
}

using

<form id="form1" method="post">  
  <input type="submit" class="button4" value="Place Order" >
</form>

jQuery:

$("#form1").on("submit",function(e) {
   e.preventDefault(); // cancel submission
   window.location.replace("login.php");
});

-----

Example:

_x000D_

$("#form1").on("submit", function(e) {_x000D_
  e.preventDefault(); // cancel submission_x000D_
  alert("this could redirect to login.php"); _x000D_
});

_x000D_

<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>_x000D_
_x000D_
_x000D_
<form id="form1" method="post" action="javascript:alert('Action!!!')">_x000D_
  <input type="submit" class="button4" value="Place Order">_x000D_
</form>

_x000D_

A valid provisioning profile for this executable was not found for debug mode

I saw this problem because I had obtained a new Mac, and was still using my old Computer's certificate. I had created a new certificate for the new Mac, but had both certificates in my keychain.

In the Organizer, the profile warned that "XCode could not find a valid private-key/certificate pair for this profile in your keychain" even though the old certificate existed in my Keychain.

The solution was to delete the old certificate from my Keychain and delete/revoke of all the profiles which used this old certificate. Then create a new profile with the new certificate and use this.

Hope this helps!

Hibernate Error: a different object with the same identifier value was already associated with the session

One way to solve the above problem will be to override the hashcode().
Also flush the hibernate session before and after save.

getHibernateTemplate().flush();

Explicitly setting the detached object to null also helps.

nginx: connect() failed (111: Connection refused) while connecting to upstream

I had the same problem when I wrote two upstreams in NGINX conf

upstream php_upstream {
    server unix:/var/run/php/my.site.sock;
    server 127.0.0.1:9000;
}

...

fastcgi_pass php_upstream;

but in /etc/php/7.3/fpm/pool.d/www.conf I listened the socket only

listen = /var/run/php/my.site.sock

So I need just socket, no any 127.0.0.1:9000, and I just removed IP+port upstream

upstream php_upstream {
    server unix:/var/run/php/my.site.sock;
}

This could be rewritten without an upstream

fastcgi_pass unix:/var/run/php/my.site.sock;

"X does not name a type" error in C++

You must declare the prototype it before using it:

class User;

class MyMessageBox
{
public:
 void sendMessage(Message *msg, User *recvr);
 Message receiveMessage();
 vector<Message> *dataMessageList;
};

class User
{
public:
 MyMessageBox dataMsgBox;
};

edit: Swapped the types

How to download folder from putty using ssh client

If you need to download a folder via a Linux command try this out:

$ scp [email protected]:foobar.txt -r /some/local/directory

Sources:

Can't find android device using "adb devices" command

If adb devices does not list the device though you have plugged it in to the system, you need to ensure that USB debugging option is checked in the Developer Options tab under Settings. Under Android 4.2.2 and above (from what I have observed), the Developer Options are hidden unless explicitly revealed. To make Developer Options active, tap 7 times on the Settings > About device > Build number. Once done, go back to Settings > Developer Options and activate USB Debugging.

Using adb version 1.0.31, I was able to make the device visible.

Should composer.lock be committed to version control?

After doing it both ways for a few projects my stance is that composer.lock should not be committed as part of the project.

composer.lock is build metadata which is not part of the project. The state of dependencies should be controlled through how you're versioning them (either manually or as part of your automated build process) and not arbitrarily by the last developer to update them and commit the lock file.

If you are concerned about your dependencies changing between composer updates then you have a lack of confidence in your versioning scheme. Versions (1.0, 1.1, 1.2, etc) should be immutable and you should avoid "dev-" and "X.*" wildcards outside of initial feature development.

Committing the lock file is a regression for your dependency management system as the dependency version has now gone back to being implicitly defined.

Also, your project should never have to be rebuilt or have its dependencies reacquired in each environment, especially prod. Your deliverable (tar, zip, phar, a directory, etc) should be immutable and promoted through environments without changing.

How do I convert a string to a double in Python?

The decimal operator might be more in line with what you are looking for:

>>> from decimal import Decimal
>>> x = "234243.434"
>>> print Decimal(x)
234243.434

How do I check if a PowerShell module is installed?

IMHO, there is difference between checking if a module is:

1) installed, or 2) imported:

To check if installed:

Option 1: Using Get-Module with -ListAvailable parameter:

If(Get-Module -ListAvailable -Name "<ModuleName>"){'Module is installed'}
Else{'Module is NOT installed'}

Option 2: Using $error object:

$error.clear()
Import-Module "<ModuleName>" -ErrorAction SilentlyContinue
If($error){Write-Host 'Module is NOT installed'}
Else{Write-Host 'Module is installed'}

To check if imported:

Using Get-Module with -Name parameter (which you can omit as it is default anyway):

if ((Get-Module -Name "<ModuleName>")) {
   Write-Host "Module is already imported (i.e. its cmdlets are available to be used.)"
}
else {
   Write-Warning "Module is NOT imported (must be installed before importing)."
}

SQL - Update multiple records in one query

in my case I have to update the records which are more than 1000, for this instead of hitting the update query each time I preferred this,

   UPDATE mst_users 
   SET base_id = CASE user_id 
   WHEN 78 THEN 999 
   WHEN 77 THEN 88 
   ELSE base_id END WHERE user_id IN(78, 77)

78,77 are the user Ids and for those user id I need to update the base_id 999 and 88 respectively.This works for me.

How to copy a map?

You have to manually copy each key/value pair to a new map. This is a loop that people have to reprogram any time they want a deep copy of a map.

You can automatically generate the function for this by installing mapper from the maps package using

go get -u github.com/drgrib/maps/cmd/mapper

and running

mapper -types string:aStruct

which will generate the file map_float_astruct.go containing not only a (deep) Copy for your map but also other "missing" map functions ContainsKey, ContainsValue, GetKeys, and GetValues:

func ContainsKeyStringAStruct(m map[string]aStruct, k string) bool {
    _, ok := m[k]
    return ok
}

func ContainsValueStringAStruct(m map[string]aStruct, v aStruct) bool {
    for _, mValue := range m {
        if mValue == v {
            return true
        }
    }

    return false
}

func GetKeysStringAStruct(m map[string]aStruct) []string {
    keys := []string{}

    for k, _ := range m {
        keys = append(keys, k)
    }

    return keys
}

func GetValuesStringAStruct(m map[string]aStruct) []aStruct {
    values := []aStruct{}

    for _, v := range m {
        values = append(values, v)
    }

    return values
}

func CopyStringAStruct(m map[string]aStruct) map[string]aStruct {
    copyMap := map[string]aStruct{}

    for k, v := range m {
        copyMap[k] = v
    }

    return copyMap
}

Full disclosure: I am the creator of this tool. I created it and its containing package because I found myself constantly rewriting these algorithms for the Go map for different type combinations.

CSV with comma or semicolon?

1.> Change File format to .CSV (semicolon delimited)

To achieve the desired result we need to temporary change the delimiter setting in the Excel Options:

Move to File -> Options -> Advanced -> Editing Section

Uncheck the “Use system separators” setting and put a comma in the “Decimal Separator” field.

Now save the file in the .CSV format and it will be saved in the semicolon delimited format.

How to save and load cookies using Python + Selenium WebDriver

This is code I used in Windows. It works.

for item in COOKIES.split(';'):
    name,value = item.split('=', 1)
    name=name.replace(' ', '').replace('\r', '').replace('\n', '')
    value = value.replace(' ', '').replace('\r', '').replace('\n', '')
    cookie_dict={
            'name':name,
            'value':value,
            "domain": "",  # Google Chrome
            "expires": "",
            'path': '/',
            'httpOnly': False,
            'HostOnly': False,
            'Secure': False
        }
    self.driver_.add_cookie(cookie_dict)

Datetime BETWEEN statement not working in SQL Server

Does the second query return any results from the 17th, or just from the 18th?

The first query will only return results from the 17th, or midnight on the 18th.

Try this instead

select * 
from LOGS 
where check_in >= CONVERT(datetime,'2013-10-17') 
and check_in< CONVERT(datetime,'2013-10-19')

creating json object with variables

It's called on Object Literal

I'm not sure what you want your structure to be, but according to what you have above, where you put the values in variables try this.

var formObject =  {"formObject": [
                {"firstName": firstName, "lastName": lastName},
                {"phoneNumber": phone},
                {"address": address},
                ]}

Although this seems to make more sense (Why do you have an array in the above literal?):

var formObject = {
   firstName: firstName
   ...
}

Increase max_execution_time in PHP?

Add this to an htaccess file (and see edit notes added below):

<IfModule mod_php5.c>
   php_value post_max_size 200M
   php_value upload_max_filesize 200M
   php_value memory_limit 300M
   php_value max_execution_time 259200
   php_value max_input_time 259200
   php_value session.gc_maxlifetime 1200
</IfModule>

Additional resources and information:

2021 EDIT:

As PHP and Apache evolve and grow, I think it is important for me to take a moment to mention a few things to consider and possible "gotchas" to consider:

PHP can be run as a module or as CGI. It is not recommended to run as CGI as it creates a lot of opportunities for attack vectors [Read More]. Running as a module (the safer option) will trigger the settings to be used if the specific module from <IfModule is loaded.
The answer indicates to write mod_php5.c in the first line. If you are using PHP 7, you would replace that with mod_php7.c.
Sometimes after you make changes to your .htaccess file, restarting Apache or NGINX will not work. The most common reason for this is you are running PHP-FPM, which runs as a separate process. You need to restart that as well.
Remember these are settings that are normally defined in your php.ini config file(s). This method is usually only useful in the event your hosting provider does not give you access to change those files. In circumstances where you can edit the PHP configuration, it is recommended that you apply these settings there.
Finally, it's important to note that not all php.ini settings can be configured via an .htaccess file. A file list of php.ini directives can be found here, and the only ones you can change are the ones in the changeable column with the modes PHP_INI_ALL or PHP_INI_PERDIR.

PHP - Notice: Undefined index:

You're getting errors because you're attempting to read post variables that haven't been set, they only get set on form submission. Wrap your php code at the bottom in an

if ($_SERVER['REQUEST_METHOD'] === 'POST') { ... }

Also, your code is ripe for SQL injection. At the very least use mysql_real_escape_string on the post vars before using them in SQL queries. mysql_real_escape_string is not good enough for a production site, but should score you extra points in class.

indexOf and lastIndexOf in PHP?

You need the following functions to do this in PHP:

strpos Find the position of the first occurrence of a substring in a string

strrpos Find the position of the last occurrence of a substring in a string

substr Return part of a string

Here's the signature of the substr function:

string substr ( string $string , int $start [, int $length ] )

The signature of the substring function (Java) looks a bit different:

string substring( int beginIndex, int endIndex )

substring (Java) expects the end-index as the last parameter, but substr (PHP) expects a length.

It's not hard, to get the desired length by the end-index in PHP:

$sub = substr($str, $start, $end - $start);

Here is the working code

$start = strpos($message, '-') + 1;
if ($req_type === 'RMT') {
    $pt_password = substr($message, $start);
}
else {
    $end = strrpos($message, '-');
    $pt_password = substr($message, $start, $end - $start);
}

Python base64 data decode

import base64
coded_string = '''Q5YACgA...'''
base64.b64decode(coded_string)

worked for me. At the risk of pasting an offensively-long result, I got:

>>> base64.b64decode(coded_string)
2: 'C\x96\x00\n\x00\x00\x00\x00C\x96\x00\x1b\x00\x00\x00\x00C\x96\x00-\x00\x00\x00\x00C\x96\x00?\x00\x00\x00\x00C\x96\x07M\x00\x00\x00\x00C\x96\x07_\x00\x00\x00\x00C\x96\x07p\x00\x00\x00\x00C\x96\x07\x82\x00\x00\x00\x00C\x96\x07\x94\x00\x00\x00\x00C\x96\x07\xa6Cq\xf0\x7fC\x96\x07\xb8DJ\x81\xc7C\x96\x07\xcaD\xa5\x9dtC\x96\x07\xdcD\xb6\x97\x11C\x96\x07\xeeD\x8b\x8flC\x96\x07\xffD\x03\xd4\xaaC\x96\x08\x11B\x05&\xdcC\x96\x08#\x00\x00\x00\x00C\x96\x085C\x0c\xc9\xb7C\x96\x08GCy\xc0\xebC\x96\x08YC\x81\xa4xC\x96\x08kC\x0f@\x9bC\x96\x08}\x00\x00\x00\x00C\x96\x08\x8e\x00\x00\x00\x00C\x96\x08\xa0\x00\x00\x00\x00C\x96\x08\xb2\x00\x00\x00\x00C\x96\x86\xf9\x00\x00\x00\x00C\x96\x87\x0b\x00\x00\x00\x00C\x96\x87\x1d\x00\x00\x00\x00C\x96\x87/\x00\x00\x00\x00C\x96\x87AA\x0b\xe7PC\x96\x87SCI\xf5gC\x96\x87eC\xd4J\xeaC\x96\x87wD\r\x17EC\x96\x87\x89D\x00F6C\x96\x87\x9bC\x9cg\xdeC\x96\x87\xadB\xd56\x0cC\x96\x87\xbf\x00\x00\x00\x00C\x96\x87\xd1\x00\x00\x00\x00C\x96\x87\xe3\x00\x00\x00\x00C\x96\x87\xf5\x00\x00\x00\x00C\x9cY}\x00\x00\x00\x00C\x9cY\x90\x00\x00\x00\x00C\x9cY\xa4\x00\x00\x00\x00C\x9cY\xb7\x00\x00\x00\x00C\x9cY\xcbC\x1f\xbd\xa3C\x9cY\xdeCCz{C\x9cY\xf1CD\x02\xa7C\x9cZ\x05C+\x9d\x97C\x9cZ\x18C\x03R\xe3C\x9cZ,\x00\x00\x00\x00C\x9cZ?
[stuff omitted as it exceeded SO's body length limits]
\xbb\x00\x00\x00\x00D\xc5!7\x00\x00\x00\x00D\xc5!\xb2\x00\x00\x00\x00D\xc7\x14x\x00\x00\x00\x00D\xc7\x14\xf6\x00\x00\x00\x00D\xc7\x15t\x00\x00\x00\x00D\xc7\x15\xf2\x00\x00\x00\x00D\xc7\x16pC5\x9f\xf9D\xc7\x16\xeeC[\xb5\xf5D\xc7\x17lCG\x1b;D\xc7\x17\xeaB\xe3\x0b\xa6D\xc7\x18h\x00\x00\x00\x00D\xc7\x18\xe6\x00\x00\x00\x00D\xc7\x19d\x00\x00\x00\x00D\xc7\x19\xe2\x00\x00\x00\x00D\xc7\xfe\xb4\x00\x00\x00\x00D\xc7\xff3\x00\x00\x00\x00D\xc7\xff\xb2\x00\x00\x00\x00D\xc8\x001\x00\x00\x00\x00'

What problem are you having, specifically?

Address validation using Google Maps API

The answer depends upon the degree of confidence you place in the data and how your data is being used. For example, if you're using it for mailing or shipping, you'll want to be be confident that the data is correct. If you're just using it as another fraud-prevention mechanism then you could potentially allow a degree of error to creep into the data.

If you want any degree of real accuracy, you're need to go with a service that does real address verification and you're going to have to pay for it. As has been mentioned by Adam, address verification and validation at first seems simple and easy, but it's a black hole fraught with challenges and, unless you've some underlying data to work with, virtually impossible to do by yourself. Trust me, you're actually saving money by using a service. You're welcome to go down this road yourself to experience what I mean, but I can guarantee you'll see the light, so to speak, after even a few hours (or days) of spinning your wheels.

I should mention that I'm the founder of SmartyStreets. We do address validation and verification addresses and we offer this for the USA and international as well. I'm more than happy to personally answer any questions you have on the topic of address cleansing, standardization, and validation.

Is there any difference between a GUID and a UUID?

GUID is Microsoft's implementation of the UUID standard.

Per Wikipedia:

The term GUID usually refers to Microsoft's implementation of the Universally Unique Identifier (UUID) standard.

An updated quote from that same Wikipedia article:

RFC 4122 itself states that UUIDs "are also known as GUIDs". All this suggests that "GUID", while originally referring to a variant of UUID used by Microsoft, has become simply an alternative name for UUID…

How to add an existing folder with files to SVN?

Let's say I have code in the directory ~/local_dir/myNewApp, and I want to put it under 'https://svn.host/existing_path/myNewApp' (while being able to ignore some binaries, vendor libraries, etc.).

Create an empty folder in the repository svn mkdir https://svn.host/existing_path/myNewApp
Go to the parent directory of the project, cd ~/local_dir
Check out the empty directory over your local folder. Don't be afraid - the files you have locally will not be deleted. svn co https://svn.host/existing_path/myNewApp. If your folder has a different name locally than in the repository, you must specify it as an additional argument.
You can see that svn st will now show all your files as ?, which means that they are not currently under revision control
Perform svn add on files you want to add to the repository, and add others to svn:ignore. You may find some useful options with svn help add, for example --parents or --depth empty, when you want selectively add only some files/folders.
Commit with svn ci

How to do joins in LINQ on multiple fields in single join

var result = from x in entity
   join y in entity2 on new { x.field1, x.field2 } equals new { y.field1, y.field2 }

java.lang.OutOfMemoryError: Java heap space

1.- Yes, but it pretty much refers to the whole memory used by your program.

2.- Yes see Java VM options

-Xms<size>        set initial Java heap size
-Xmx<size>        set maximum Java heap size

java -Xmx2g assign 2 gigabytes of ram as maximum to your app

But you should see if you don't have a memory leak first.

3.- It depends on the program. Try spot memory leaks. This question would be to hard to answer. Lately you can profile using JConsole to try to find out where your memory is going to

MVC 3: How to render a view without its layout page when loaded via ajax?

With ASP.NET 5 there is no Request variable available anymore. You can access it now with Context.Request

Also there is no IsAjaxRequest() Method anymore, you have to write it by yourself, for example in Extensions\HttpRequestExtensions.cs

using System;
using Microsoft.AspNetCore.Http;

namespace Microsoft.AspNetCore.Mvc
{
    public static class HttpRequestExtensions
    {
        public static bool IsAjaxRequest(this HttpRequest request)
        {
            if (request == null)
            {
                throw new ArgumentNullException(nameof(request));
            }

            return (request.Headers != null) && (request.Headers["X-Requested-With"] == "XMLHttpRequest");
        }
    }
}

I searched for a while now on this and hope that will help some others too ;)

Resource: https://github.com/aspnet/AspNetCore/issues/2729

Environment Specific application.properties file in Spring Boot application

Spring Boot already has support for profile based properties.

Simply add an application-[profile].properties file and specify the profiles to use using the spring.profiles.active property.

-Dspring.profiles.active=local

This will load the application.properties and the application-local.properties with the latter overriding properties from the first.

Show message box in case of exception

If you want just the summary of the exception use:

    try
    {
        test();
    }
    catch (Exception ex)
    {
        MessageBox.Show(ex.Message);
    }

If you want to see the whole stack trace (usually better for debugging) use:

    try
    {
        test();
    }
    catch (Exception ex)
    {
        MessageBox.Show(ex.ToString());
    }

Another method I sometime use is:

    private DoSomthing(int arg1, int arg2, out string errorMessage)
    {
         int result ;
        errorMessage = String.Empty;
        try 
        {           
            //do stuff
            int result = 42;
        }
        catch (Exception ex)
        {

            errorMessage = ex.Message;//OR ex.ToString(); OR Free text OR an custom object
            result = -1;
        }
        return result;
    }

And In your form you will have something like:

    string ErrorMessage;
    int result = DoSomthing(1, 2, out ErrorMessage);
    if (!String.IsNullOrEmpty(ErrorMessage))
    {
        MessageBox.Show(ErrorMessage);
    }

How to get a div to resize its height to fit container?

Simple Way

You can achieve this with setting both the top and bottom attributes of the nav to 0 and the position: absolute. Set the container to position: relative.

See how this is done

Modern Way (Flexbox)

IE11+ and all modern browsers support flexbox.

.container {
  display: flex;
  flex-direction: column;
}

.child {
  flex-grow: 1;
}

how to get the one entry from hashmap without iterating

Get values, convert it to an array, get array's first element:

map.values().toArray()[0]

Adding up BigDecimals using Streams

If you don't mind a third party dependency, there is a class named Collectors2 in Eclipse Collections which contains methods returning Collectors for summing and summarizing BigDecimal and BigInteger. These methods take a Function as a parameter so you can extract a BigDecimal or BigInteger value from an object.

List<BigDecimal> list = mList(
        BigDecimal.valueOf(0.1),
        BigDecimal.valueOf(1.1),
        BigDecimal.valueOf(2.1),
        BigDecimal.valueOf(0.1));

BigDecimal sum =
        list.stream().collect(Collectors2.summingBigDecimal(e -> e));
Assert.assertEquals(BigDecimal.valueOf(3.4), sum);

BigDecimalSummaryStatistics statistics =
        list.stream().collect(Collectors2.summarizingBigDecimal(e -> e));
Assert.assertEquals(BigDecimal.valueOf(3.4), statistics.getSum());
Assert.assertEquals(BigDecimal.valueOf(0.1), statistics.getMin());
Assert.assertEquals(BigDecimal.valueOf(2.1), statistics.getMax());
Assert.assertEquals(BigDecimal.valueOf(0.85), statistics.getAverage());

Note: I am a committer for Eclipse Collections.

how to overwrite css style

You can create one more class naming

.flex-control-thumbs-without-width li {
width: auto;
float: initial; or none
}

Add this class whenever you need to override like below,

<li class="flex-control-thumbs flex-control-thumbs-without-width"> </li>

And do remove whenever you don't need for other <li>

python mpl_toolkits installation issue

It doesn't work on Ubuntu 16.04, it seems that some libraries have been forgotten in the python installation package on this one. You should use package manager instead.

Solution

Uninstall matplotlib from pip then install it again with apt-get

python 2:

sudo pip uninstall matplotlib
sudo apt-get install python-matplotlib

python 3:

sudo pip3 uninstall matplotlib
sudo apt-get install python3-matplotlib

Can we pass parameters to a view in SQL?

I realized this task for my needs as follows

set nocount on;

  declare @ToDate date = dateadd(month,datediff(month,0,getdate())-1,0)

declare @year varchar(4)  = year(@ToDate)
declare @month varchar(2) = month(@ToDate)

declare @sql nvarchar(max)
set @sql = N'
    create or alter view dbo.wTempLogs
    as
    select * from dbo.y2019
    where
        year(LogDate) = ''_year_''
        and 
        month(LogDate) = ''_month_''    '

select @sql = replace(replace(@sql,'_year_',@year),'_month_',@month)

execute sp_executesql @sql

declare @errmsg nvarchar(max)
    set @errMsg = @sql
    raiserror (@errMsg, 0,1) with nowait

Array.size() vs Array.length

The .size() method is deprecated as of jQuery 1.8. Use the .length property instead

See: https://api.jquery.com/size/

What is the javascript filename naming convention?

There is no official, universal, convention for naming JavaScript files.

There are some various options:

scriptName.js
script-name.js
script_name.js

are all valid naming conventions, however I prefer the jQuery suggested naming convention (for jQuery plugins, although it works for any JS)

jquery.pluginname.js

The beauty to this naming convention is that it explicitly describes the global namespace pollution being added.

foo.js adds window.foo
foo.bar.js adds window.foo.bar

Because I left out versioning: it should come after the full name, preferably separated by a hyphen, with periods between major and minor versions:

foo-1.2.1.js
foo-1.2.2.js
...
foo-2.1.24.js

git remove merge commit from history

To Just Remove a Merge Commit

If all you want to do is to remove a merge commit (2) so that it is like it never happened, the command is simply as follows

git rebase --onto <sha of 1> <sha of 2> <blue branch>

And now the purple branch isn't in the commit log of blue at all and you have two separate branches again. You can then squash the purple independently and do whatever other manipulations you want without the merge commit in the way.

This version of Android Studio cannot open this project, please retry with Android Studio 3.4 or newer

this issue occur for me after downgrade Java JDK, after upgrade JDK my problem resolved.

Android set bitmap to Imageview

this code works with me

 ImageView carView = (ImageView) v.findViewById(R.id.car_icon);

                            byte[] decodedString = Base64.decode(picture, Base64.NO_WRAP);
                            InputStream input=new ByteArrayInputStream(decodedString);
                            Bitmap ext_pic = BitmapFactory.decodeStream(input);
                            carView.setImageBitmap(ext_pic);

The term 'Get-ADUser' is not recognized as the name of a cmdlet

Check here for how to add the activedirectory module if not there by default. This can be done on any machine and then it will allow you to access your active directory "domain control" server.

EDIT

To prevent problems with stale links (I have found MSDN blogs to disappear for no reason in the past), in essence for Windows 7 you need to download and install Remote Server Administration Tools (KB958830). After installing do the following steps:

Open Control Panel -> Programs and Features -> Turn On/Off Windows Features
Find "Remote Server Administration Tools" and expand it
Find "Role Administration Tools" and expand it
Find "AD DS And AD LDS Tools" and expand it
Check the box next to "Active Directory Module For Windows PowerShell".
Click OK and allow Windows to install the feature

Windows server editions should already be OK but if not you need to download and install the Active Directory Management Gateway Service. If any of these links should stop working, you should still be able search for the KB article or download names and find them.

Simple PHP form: Attachment to email (code golf)

A combination of this http://www.webcheatsheet.com/PHP/send_email_text_html_attachment.php#attachment

with the php upload file example would work. In the upload file example instead of using move_uploaded_file to move it from the temporary folder you would just open it:

$attachment = chunk_split(base64_encode(file_get_contents($tmp_file)));

where $tmp_file = $_FILES['userfile']['tmp_name'];

and send it as an attachment like the rest of the example.

All in one file / self contained:

<? if(isset($_POST['submit'])){
//process and email
}else{
//display form
}
?>

I think its a quick exercise to get what you need working based on the above two available examples.

P.S. It needs to get uploaded somewhere before Apache passes it along to PHP to do what it wants with it. That would be your system's temp folder by default unless it was changed in the config file.

Convert from lowercase to uppercase all values in all character variables in dataframe

If you need to deal with data.frames that include factors you can use:

df = data.frame(v1=letters[1:5],v2=1:5,v3=letters[10:14],v4=as.factor(letters[1:5]),v5=runif(5),stringsAsFactors=FALSE)

df
    v1 v2 v3 v4        v5
    1  a  1  j  a 0.1774909
    2  b  2  k  b 0.4405019
    3  c  3  l  c 0.7042878
    4  d  4  m  d 0.8829965
    5  e  5  n  e 0.9702505


sapply(df,class)
         v1          v2          v3          v4          v5
"character"   "integer" "character"    "factor"   "numeric"

Use mutate_each_ to convert factors to character then convert all to uppercase

   upper_it = function(X){X %>% mutate_each_( funs(as.character(.)), names( .[sapply(., is.factor)] )) %>%
   mutate_each_( funs(toupper), names( .[sapply(., is.character)] ))}   # convert factor to character then uppercase

Gives

  upper_it(df)
      v1 v2 v3 v4
    1  A  1  J  A
    2  B  2  K  B
    3  C  3  L  C
    4  D  4  M  D
    5  E  5  N  E

While

sapply( upper_it(df),class)
         v1          v2          v3          v4          v5
"character"   "integer" "character" "character"   "numeric"

Scala best way of turning a Collection into a Map-by-key?

Scala 2.13+

instead of "breakOut"

c.map(t => (t.getP, t)).to(Mat)

Scroll to "View": https://www.scala-lang.org/blog/2017/02/28/collections-rework.html

'No database provider has been configured for this DbContext' on SignInManager.PasswordSignInAsync

This is the solution i found.

https://github.com/aspnet/EntityFramework.Docs/blob/master/entity-framework/core/miscellaneous/configuring-dbcontext.md

Configure DBContext via AddDbContext

public void ConfigureServices(IServiceCollection services)
{
    services.AddDbContext<BloggingContext>(options => options.UseSqlite("Data Source=blog.db"));
}

Add new constructor to your DBContext class

public class BloggingContext : DbContext
{
    public BloggingContext(DbContextOptions<BloggingContext> options)
      :base(options)
    { }

    public DbSet<Blog> Blogs { get; set; }
}

Inject context to your controllers

public class MyController
{
    private readonly BloggingContext _context;

    public MyController(BloggingContext context)
    {
      _context = context;
    }

    ...
}

Objective-C ARC: strong vs retain and weak vs assign

The differences between strong and retain:

In iOS4, strong is equal to retain
It means that you own the object and keep it in the heap until don’t point to it anymore
If you write retain it will automatically work just like strong

The differences between weak and assign:

A “weak” reference is a reference that you don’t retain and you keep it as long as someone else points to it strongly
When the object is “deallocated”, the weak pointer is automatically set to nil
A "assign" property attribute tells the compiler how to synthesize the property’s setter implementation

Searching for file in directories recursively

For file and directory search purpose I would want to offer use specialized multithreading .NET library that possess a wide search opportunities and works very fast.

All information about library you can find on GitHub: https://github.com/VladPVS/FastSearchLibrary

If you want to download it you can do it here: https://github.com/VladPVS/FastSearchLibrary/releases

If you have any questions please ask them.

It is one demonstrative example how you can use it:

class Searcher
{
    private static object locker = new object(); 

    private FileSearcher searcher;

    List<FileInfo> files;

    public Searcher()
    {
        files = new List<FileInfo>(); // create list that will contain search result
    }

    public void Startsearch()
    {
        CancellationTokenSource tokenSource = new CancellationTokenSource();
        // create tokenSource to get stop search process possibility

        searcher = new FileSearcher(@"C:\", (f) =>
        {
            return Regex.IsMatch(f.Name, @".*[Dd]ragon.*.jpg$");
        }, tokenSource);  // give tokenSource in constructor


        searcher.FilesFound += (sender, arg) => // subscribe on FilesFound event
        {
            lock (locker) // using a lock is obligatorily
            {
                arg.Files.ForEach((f) =>
                {
                    files.Add(f); // add the next received file to the search results list
                    Console.WriteLine($"File location: {f.FullName}, \nCreation.Time: {f.CreationTime}");
                });

                if (files.Count >= 10) // one can choose any stopping condition
                    searcher.StopSearch();
            }
        };

        searcher.SearchCompleted += (sender, arg) => // subscribe on SearchCompleted event
        {
            if (arg.IsCanceled) // check whether StopSearch() called
                Console.WriteLine("Search stopped.");
            else
                Console.WriteLine("Search completed.");

            Console.WriteLine($"Quantity of files: {files.Count}"); // show amount of finding files
        };

        searcher.StartSearchAsync();
        // start search process as an asynchronous operation that doesn't block the called thread
    }
}

Loading DLLs at runtime in C#

Activator.CreateInstance() returns an object, which doesn't have an Output method.

It looks like you come from dynamic programming languages? C# is definetly not that, and what you are trying to do will be difficult.

Since you are loading a specific dll from a specific location, maybe you just want to add it as a reference to your console application?

If you absolutely want to load the assembly via Assembly.Load, you will have to go via reflection to call any members on c

Something like type.GetMethod("Output").Invoke(c, null); should do it.

How to check for a Null value in VB.NET

If Not editTransactionRow.pay_id AndAlso String.IsNullOrEmpty(editTransactionRow.pay_id.ToString()) = False Then
    stTransactionPaymentID = editTransactionRow.pay_id 'Check for null value
End If

Android Fragment handle back button press

For Those Who Use Static Fragment

In a case if you have a static fragment then It would be preferable. Make an instance object of your fragment

private static MyFragment instance=null;

in onCreate() of MyFragment initialize that instance

  instance=this;

also make a function to get Instance

 public static MyFragment getInstance(){
   return instance;
}

also make functions

public boolean allowBackPressed(){
    if(allowBack==true){
        return true;
    }
    return false;
}


 //allowBack is a boolean variable that will be set to true at the action 
 //where you want that your backButton should not close activity. In my case I open 
 //Navigation Drawer then I set it to true. so when I press backbutton my 
 //drawer should be get closed

public void performSomeAction(){
    //.. Your code
    ///Here I have closed my drawer
}

In Your Activity You can do

@Override
public void onBackPressed() {

    if (MyFragment.getInstance().allowBackPressed()) { 
        MyFragment.getInstance().performSomeAction();
    }
    else{
        super.onBackPressed();
    }
}

Jenkins Git Plugin: How to build specific tag?

I was able to do that by using the "branches to build" parameter:

Branch Specifier (blank for default): tags/[tag-name]

Replace [tag-name] by the name of your tag.

Can you require two form fields to match with HTML5?

A simple solution with minimal javascript is to use the html attribute pattern (supported by most modern browsers). This works by setting the pattern of the second field to the value of the first field.

Unfortunately, you also need to escape the regex, for which no standard function exists.

<form>
    <input type="text" oninput="form.confirm.pattern = escapeRegExp(this.value)">
    <input name="confirm" pattern="" title="Fields must match" required>
</form>
<script>
    function escapeRegExp(str) {
      return str.replace(/[\-\[\]\/\{\}\(\)\*\+\?\.\\\^\$\|]/g, "\\$&");
    }
</script>

Create local maven repository

If maven is not creating Local Repository i.e .m2/repository folder then try below step.

In your Eclipse\Spring Tool Suite, Go to Window->preferences-> maven->user settings-> click on Restore Defaults-> Apply->Apply and close

how to initialize a char array?

The C-like method may not be as attractive as the other solutions to this question, but added here for completeness:

You can initialise with NULLs like this:

char msg[65536] = {0};

Or to use zeros consider the following:

char msg[65536] = {'0' another 65535 of these separated by comma};

But do not try it as not possible, so use memset!

In the second case, add the following after the memset if you want to use msg as a string.

msg[65536 - 1] =  '\0'

Answers to this question also provide further insight.

Attach a body onload event with JS

Why not using jQuery?

$(document).ready(function(){}))

As far as I know, this is the perfect solution.

How to change colors of a Drawable in Android?

I was able to do this with the following code, which is taken from an activity (the layout is a very simple one, just containing an ImageView, and is not posted here).

private static final int[] FROM_COLOR = new int[]{49, 179, 110};
private static final int THRESHOLD = 3;

public void onCreate(Bundle savedInstanceState)
{
    super.onCreate(savedInstanceState);
    setContentView(R.layout.test_colors);

    ImageView iv = (ImageView) findViewById(R.id.img);
    Drawable d = getResources().getDrawable(RES);
    iv.setImageDrawable(adjust(d));
}

private Drawable adjust(Drawable d)
{
    int to = Color.RED;

    //Need to copy to ensure that the bitmap is mutable.
    Bitmap src = ((BitmapDrawable) d).getBitmap();
    Bitmap bitmap = src.copy(Bitmap.Config.ARGB_8888, true);
    for(int x = 0;x < bitmap.getWidth();x++)
        for(int y = 0;y < bitmap.getHeight();y++)
            if(match(bitmap.getPixel(x, y))) 
                bitmap.setPixel(x, y, to);

    return new BitmapDrawable(bitmap);
}

private boolean match(int pixel)
{
    //There may be a better way to match, but I wanted to do a comparison ignoring
    //transparency, so I couldn't just do a direct integer compare.
    return Math.abs(Color.red(pixel) - FROM_COLOR[0]) < THRESHOLD &&
        Math.abs(Color.green(pixel) - FROM_COLOR[1]) < THRESHOLD &&
        Math.abs(Color.blue(pixel) - FROM_COLOR[2]) < THRESHOLD;
}

Assigning variables with dynamic names in Java

You don't. The closest thing you can do is working with Maps to simulate it, or defining your own Objects to deal with.

How do I find the difference between two values without knowing which is larger?

abs(x-y) will do exactly what you're looking for:

In [1]: abs(1-2)
Out[1]: 1

In [2]: abs(2-1)
Out[2]: 1

sqlplus how to find details of the currently connected database session

select * from v$session
where sid = to_number(substr(dbms_session.unique_session_id,1,4),'XXXX')

Java: Literal percent sign in printf statement

You can use StringEscapeUtils from Apache Commons Logging utility or escape manually using code for each character.

Using a Loop to add objects to a list(python)

Auto-incrementing the index in a loop:

myArr[(len(myArr)+1)]={"key":"val"}

Graphical DIFF programs for linux

I have used Meld once, which seemed very nice, and I may try more often. vimdiff works well, if you know vim well. Lastly I would mention I've found xxdiff does a reasonable job for a quick comparison. There are many diff programs out there which do a good job.

What is this CSS selector? [class*="span"]

It's an attribute wildcard selector. In the sample you've given, it looks for any child element under .show-grid that has a class that CONTAINS span.

So would select the <strong> element in this example:

<div class="show-grid">
    <strong class="span6">Blah blah</strong>
</div>

You can also do searches for 'begins with...'

div[class^="something"] { }

which would work on something like this:-

<div class="something-else-class"></div>

and 'ends with...'

div[class$="something"] { }

which would work on

<div class="you-are-something"></div>

Good references

Get bitcoin historical data

Scraping it to JSON with Node.js would be fun :)

https://github.com/f1lt3r/bitcoin-scraper

enter image description here

[
  [
    1419033600,  // Timestamp (1 for each minute of entire history)
    318.58,      // Open
    318.58,      // High
    318.58,      // Low
    318.58,      // Close
    0.01719605,  // Volume (BTC)
    5.478317609, // Volume (Currency)
    318.58       // Weighted Price (USD)
  ]
]

Error:java: invalid source release: 8 in Intellij. What does it mean?

As Andreas mentioned all about:

Error:java: invalid source release: 8 in IntelliJ
Error:java: invalid source release: 13 in IntelliJ
Error:java: invalid source release: 14 in IntelliJ...

OR whatever version you are using in Java...

The problem will exist if you do not have it matching inside the below code:

<properties>
    <maven.compiler.source>1.8</maven.compiler.source>
    <maven.compiler.target>1.8</maven.compiler.target>
</properties>

This 1.8 in my case, must be matching on your device through MAVEN project library, settings, preferences, project setting and SDK.

How to install xgboost in Anaconda Python (Windows platform)?

Download package from this website. I downloaded xgboost-0.6-cp36-cp36m-win_amd64.whl for anaconda 3 (python 3.6)
Put the package in directory C:\
Open anaconda 3 prompt
Type cd C:\
Type pip install C:\xgboost-0.6-cp36-cp36m-win_amd64.whl
Type conda update scikit-learn

How to remove any URL within a string in Python

The following regular expression in Python works well for detecting URL(s) in the text:

source_text = '''
text1
text2
http://url.com/bla1/blah1/
text3
text4
http://url.com/bla2/blah2/
text5
text6    '''

import re
url_reg  = r'[a-z]*[:.]+\S+'
result   = re.sub(url_reg, '', source_text)
print(result)

Output:

text1
text2

text3
text4

text5
text6

Count number of 1's in binary representation

I saw the following solution from another website:

int count_one(int x){
    x = (x & (0x55555555)) + ((x >> 1) & (0x55555555));
    x = (x & (0x33333333)) + ((x >> 2) & (0x33333333));
    x = (x & (0x0f0f0f0f)) + ((x >> 4) & (0x0f0f0f0f));
    x = (x & (0x00ff00ff)) + ((x >> 8) & (0x00ff00ff));
    x = (x & (0x0000ffff)) + ((x >> 16) & (0x0000ffff));
    return x;
}

How do I rename the android package name?

In addition to @Cristian's answer above, I had to do two more steps to get it working correctly. I will sum all of it here:

Change the package name manually in the manifest file.
Click on your R.java class and the press F6 (Refactor->Move...). It will allow you to move the class to another package, and all references to that class will be updated.
Change manually the application Id in the build.gradle file : android / defaultconfig / application ID [source].
Create a new package with the desired name by right clicking on the java folder -> new -> package and select and drag all your classes to the new package. Android Studio will refactor the package name everywhere [source].

Converting a double to an int in Javascript without rounding

Just use parseInt() and be sure to include the radix so you get predictable results:

parseInt(d, 10);

How to replace sql field value

Try this query it ll change the records ends with .com

 UPDATE tablename SET email = replace(email, '.com', '.org') WHERE  email LIKE '%.com';

How do I enumerate through a JObject?

For people like me, linq addicts, and based on svick's answer, here a linq approach:

using System.Linq;
//...
//make it linq iterable. 
var obj_linq = Response.Cast<KeyValuePair<string, JToken>>();

Now you can make linq expressions like:

JToken x = obj_linq
          .Where( d => d.Key == "my_key")
          .Select(v => v)
          .FirstOrDefault()
          .Value;
string y = ((JValue)x).Value;

Or just:

var y = obj_linq
       .Where(d => d.Key == "my_key")
       .Select(v => ((JValue)v.Value).Value)
       .FirstOrDefault();

Or this one to iterate over all data:

obj_linq.ToList().ForEach( x => { do stuff } );

How to add "on delete cascade" constraints?

Based off of @Mike Sherrill Cat Recall's answer, this is what worked for me:

ALTER TABLE "Children"
DROP CONSTRAINT "Children_parentId_fkey",
ADD CONSTRAINT "Children_parentId_fkey"
  FOREIGN KEY ("parentId")
  REFERENCES "Parent"(id)
  ON DELETE CASCADE;

Changing Shell Text Color (Windows)

Or about the best module I have found http://pypi.python.org/pypi/colorama

Ignore Duplicates and Create New List of Unique Values in Excel

=SORT(UNIQUE(A:A))

The above formula works best if you want to list unique values in a column.

UICollectionView Self Sizing Cells with Auto Layout

Update more information:

If you use flowLayout.estimatedItemSize, suggest use iOS8.3 later version. Before iOS8.3, it will crash [super layoutAttributesForElementsInRect:rect];. The error message is

*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[__NSArrayM insertObject:atIndex:]: object cannot be nil'
Second, in iOS8.x version, flowLayout.estimatedItemSize will cause different section inset setting did not work. i.e. function: (UIEdgeInsets)collectionView:layout:insetForSectionAtIndex:.

Pointers in Python?

There's no way you can do that changing only that line. You can do:

a = [1]
b = a
a[0] = 2
b[0]

That creates a list, assigns the reference to a, then b also, uses the a reference to set the first element to 2, then accesses using the b reference variable.

How to create EditText with rounded corners?

By my way of thinking, it already has rounded corners.

In case you want them more rounded, you will need to:

Clone all of the nine-patch PNG images that make up an EditText background (found in your SDK)
Modify each to have more rounded corners
Clone the XML StateListDrawable resource that combines those EditText backgrounds into a single Drawable, and modify it to point to your more-rounded nine-patch PNG files
Use that new StateListDrawable as the background for your EditText widget

Set colspan dynamically with jquery

How about

$([your selector]).attr('colspan',3);

I would imagine that to work but have no way to test at the moment. Using .attr() would be the usual jQuery way of setting attributes of elements in the wrapped set.

As has been mentioned in another answer, in order to get this to work would require removing the td elements that have no text in them from the DOM. It may be easier to do this all server side

EDIT:

As was mentioned in the comments, there is a bug in attempting to set colspan using attr() in IE, but the following works in IE6 and FireFox 3.0.13.

Working Demo

notice the use of the attribute colSpan and not colspan - the former works in both IE and Firefox, but the latter does not work in IE. Looking at jQuery 1.3.2 source, it would appear that attr() attempts to set the attribute as a property of the element if

it exists as a property on the element (colSpan exists as a property and defaults to 1 on <td> HTMLElements in IE and FireFox)
the document is not xml and
the attribute is none of href, src or style

using colSpan as opposed to colspan works with attr() because the former is a property defined on the element whereas the latter is not.

the fall-through for attr() is to attempt to use setAttribute() on the element in question, setting the value to a string, but this causes problems in IE (bug #1070 in jQuery)

// convert the value to a string (all browsers do this but IE) see #1070
elem.setAttribute( name, "" + value );

In the demo, for each row, the text in each cell is evaluated. If the text is a blank string, then the cell is removed and a counter incremented. The first cell in the row that does not have class="colTime" has a colspan attribute set to the value of the counter + 1 (for the span it occupies itself).

After this, for each row, the text in the cell with class="colspans" is set to the colspan attribute values of each cell in the row from left to right.

HTML

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
  "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js"></script>
<title>Sandbox</title>
<meta http-equiv="Content-type" content="text/html; charset=utf-8" />
<style type="text/css" media="screen">
body { background-color: #000; font: 16px Helvetica, Arial; color: #fff; }
td { text-align: center; }
</style>
</head>
<body>
<table  class="tblSimpleAgenda" cellpadding="5" cellspacing="0">
 <tbody>
        <tr>
            <th align="left">Time</th>
            <th align="left">Room 1</th>
            <th align="left">Room 2</th>
            <th align="left">Room 3</th> 
            <th align="left">Colspans (L -> R)</th>
        </tr>
        <tr valign="top">
            <td class="colTime">09:00 – 10:00</td>
            <td class="col1"></td>
            <td class="col2">Meeting 2</td>
            <td class="col3"></td>
            <td class="colspans">holder</td>
        </tr>

        <tr valign="top">
            <td class="colTime">10:00 – 10:45</td>
            <td class="col1">Meeting 1</td>
            <td class="col2">Meeting 2</td>
            <td class="col3">Meeting 3</td>    
             <td class="colspans">holder</td> 
        </tr>

        <tr valign="top">
            <td class="colTime">11:00 – 11:45</td>
            <td class="col1">Meeting 1</td>
            <td class="col2">Meeting 2</td>
            <td class="col3">Meeting 3</td>
            <td class="colspans">holder</td>     
        </tr>

        <tr valign="top">
            <td class="colTime">11:00 – 11:45</td>
            <td class="col1">Meeting 1</td>
            <td class="col2">Meeting 2</td>
            <td class="col3"></td>
            <td class="colspans">holder</td>     
        </tr>
</tbody>
</table>

</body>
</html>

jQuery code

$(function() {

  $('table.tblSimpleAgenda tr').each(function() {
    var tr = this;
    var counter = 0;

    $('td', tr).each(function(index, value) {
      var td = $(this);

      if (td.text() == "") {
        counter++;
        td.remove();
      }
    });

    if (counter !== 0) {
      $('td:not(.colTime):first', tr)
        .attr('colSpan', '' + parseInt(counter + 1,10) + '');
    }
  });

  $('td.colspans').each(function(){
    var td = $(this);
    var colspans = [];

    td.siblings().each(function() {
      colspans.push(($(this).attr('colSpan')) == null ? 1 : $(this).attr('colSpan'));
    });

    td.text(colspans.join(','));
  });

});

This is just a demonstration to show that attr() can be used, but to be aware of it's implementation and the cross-browser quirks that come with it. I've also made some assumptions about your table layout in the demo (i.e. apply the colspan to the first "non-Time" cell in each row), but hopefully you get the idea.

Pure CSS to make font-size responsive based on dynamic amount of characters

You might be interested in the calc approach:

font-size: calc(4vw + 4vh + 2vmin);

done. Tweak values till matches your taste.

Source: https://codepen.io/CrocoDillon/pen/fBJxu

Where is svn.exe in my machine?

I installed TortoiseSVN-1.12.2.28653-x64-svn-1.12.2 in Windows 10 with commandline tool enabled. Still it didn't have the svn.exe file inside the bin folder.

So I downloaded Apache Subversion commandline tools from https://www.visualsvn.com/files/Apache-Subversion-1.13.0.zip. After unzipping, I have put the following two locations into my PATH variable:

C:\Program Files\TortoiseSVN\bin
E:\Apache-Subversion-1.13.0\bin

Everything works fine for me after this configuration.I wanted to use SVN in VsCode IDE.

Circular (or cyclic) imports in Python

If you do import foo (inside bar.py) and import bar (inside foo.py), it will work fine. By the time anything actually runs, both modules will be fully loaded and will have references to each other.

The problem is when instead you do from foo import abc (inside bar.py) and from bar import xyz (inside foo.py). Because now each module requires the other module to already be imported (so that the name we are importing exists) before it can be imported.

How can I implement the Iterable interface?

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

So I would at least change it to:

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

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

    ...

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

and this should work:

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

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

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

This is a pretty obscure corner case of Java generics.

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

Maven 3 and JUnit 4 compilation problem: package org.junit does not exist

@Dennis Roberts: You were absolutely right: My test class was located in src/main/java. Also the value of the "scope" element in the POM for JUnit was "test", although that is how it is supposed to be. The problem was that I had been sloppy when creating the test class in Eclipse, resulting in it being created in src/main/java insted of src/test/java. This became easier to see in Eclipse's Project Explorer view after running "mvn eclipse:eclipse", but your comment was what made me see it first. Thanks.

Please explain about insertable=false and updatable=false in reference to the JPA @Column annotation

According to Javax's persistence documentation:

Whether the column is included in SQL UPDATE statements generated by the persistence provider.

It would be best to understand from the official documentation here.

Cloud Firestore collection count

No, there is no built-in support for aggregation queries right now. However there are a few things you could do.

The first is documented here. You can use transactions or cloud functions to maintain aggregate information:

This example shows how to use a function to keep track of the number of ratings in a subcollection, as well as the average rating.

exports.aggregateRatings = firestore
  .document('restaurants/{restId}/ratings/{ratingId}')
  .onWrite(event => {
    // Get value of the newly added rating
    var ratingVal = event.data.get('rating');

    // Get a reference to the restaurant
    var restRef = db.collection('restaurants').document(event.params.restId);

    // Update aggregations in a transaction
    return db.transaction(transaction => {
      return transaction.get(restRef).then(restDoc => {
        // Compute new number of ratings
        var newNumRatings = restDoc.data('numRatings') + 1;

        // Compute new average rating
        var oldRatingTotal = restDoc.data('avgRating') * restDoc.data('numRatings');
        var newAvgRating = (oldRatingTotal + ratingVal) / newNumRatings;

        // Update restaurant info
        return transaction.update(restRef, {
          avgRating: newAvgRating,
          numRatings: newNumRatings
        });
      });
    });
});

The solution that jbb mentioned is also useful if you only want to count documents infrequently. Make sure to use the select() statement to avoid downloading all of each document (that's a lot of bandwidth when you only need a count). select() is only available in the server SDKs for now so that solution won't work in a mobile app.

Find document with array that contains a specific value

Incase of lookup_food_array is array.

match_stage["favoriteFoods"] = {'$elemMatch': {'$in': lookup_food_array}}

Incase of lookup_food_array is string.

match_stage["favoriteFoods"] = {'$elemMatch': lookup_food_string}

Call parent method from child class c#

One way to do this would be to pass the instance of ParentClass to the ChildClass on construction

public ChildClass
{
    private ParentClass parent;

    public ChildClass(ParentClass parent)
    {
        this.parent = parent;
    }

    public void LoadData(DateTable dt)
    {
       // do something
       parent.CurrentRow++; // or whatever.
       parent.UpdateProgressBar(); // Call the method
    }
}

Make sure to pass the reference to this when constructing ChildClass inside parent:

if(loadData){

     ChildClass childClass = new ChildClass(this); // here

     childClass.LoadData(this.Datatable);

}

Caveat: This is probably not the best way to organise your classes, but it directly answers your question.

EDIT: In the comments you mention that more than 1 parent class wants to use ChildClass. This is possible with the introduction of an interface, eg:

public interface IParentClass
{
    void UpdateProgressBar();
    int CurrentRow{get; set;}
}

Now, make sure to implement that interface on both (all?) Parent Classes and change child class to this:

public ChildClass
{
    private IParentClass parent;

    public ChildClass(IParentClass parent)
    {
        this.parent = parent;
    }

    public void LoadData(DateTable dt)
    {
       // do something
       parent.CurrentRow++; // or whatever.
       parent.UpdateProgressBar(); // Call the method
    }
}

Now anything that implements IParentClass can construct an instance of ChildClass and pass this to its constructor.

Exercises to improve my Java programming skills

I highly recommend reading the book 'Effective Java' from Joshua Bloch.

Excel VBA - How to Redim a 2D array?

I stumbled across this question while hitting this road block myself. I ended up writing a piece of code real quick to handle this ReDim Preserve on a new sized array (first or last dimension). Maybe it will help others who face the same issue.

So for the usage, lets say you have your array originally set as MyArray(3,5), and you want to make the dimensions (first too!) larger, lets just say to MyArray(10,20). You would be used to doing something like this right?

 ReDim Preserve MyArray(10,20) '<-- Returns Error

But unfortunately that returns an error because you tried to change the size of the first dimension. So with my function, you would just do something like this instead:

 MyArray = ReDimPreserve(MyArray,10,20)

Now the array is larger, and the data is preserved. Your ReDim Preserve for a Multi-Dimension array is complete. :)

And last but not least, the miraculous function: ReDimPreserve()

'redim preserve both dimensions for a multidimension array *ONLY
Public Function ReDimPreserve(aArrayToPreserve,nNewFirstUBound,nNewLastUBound)
    ReDimPreserve = False
    'check if its in array first
    If IsArray(aArrayToPreserve) Then       
        'create new array
        ReDim aPreservedArray(nNewFirstUBound,nNewLastUBound)
        'get old lBound/uBound
        nOldFirstUBound = uBound(aArrayToPreserve,1)
        nOldLastUBound = uBound(aArrayToPreserve,2)         
        'loop through first
        For nFirst = lBound(aArrayToPreserve,1) to nNewFirstUBound
            For nLast = lBound(aArrayToPreserve,2) to nNewLastUBound
                'if its in range, then append to new array the same way
                If nOldFirstUBound >= nFirst And nOldLastUBound >= nLast Then
                    aPreservedArray(nFirst,nLast) = aArrayToPreserve(nFirst,nLast)
                End If
            Next
        Next            
        'return the array redimmed
        If IsArray(aPreservedArray) Then ReDimPreserve = aPreservedArray
    End If
End Function

I wrote this in like 20 minutes, so there's no guarantees. But if you would like to use or extend it, feel free. I would've thought that someone would've had some code like this up here already, well apparently not. So here ya go fellow gearheads.

How to convert FileInputStream to InputStream?

InputStream is = new FileInputStream("c://filename");
return is;

Example JavaScript code to parse CSV data

Just use .split(','):

var str = "How are you doing today?";
var n = str.split(" ");

specifying goal in pom.xml

I've bumped into this question because I actually wanted to define a default goal in pom.xml. You can define a default goal under build:

<build>
    <defaultGoal>install</defaultGoal>
...
</build>

After that change, you can then simply run mvn which will do exactly the same as mvn install.

Note: I don't favor this as a default approach. My use case was to define a profile that downloaded a previous version of that project from Artifactory and wanted to tie that profile to a given phase. For convenience, I can run mvn -Pdownload-jar -Dversion=0.0.9 and don't need to specify a goal/phase there. I think it's reasonable to define a defaultGoal in a profile which has a very specific function for a particular phase.

Git says local branch is behind remote branch, but it's not

The solution is very simple and worked for me.

Try this :

git pull --rebase <url>

then

git push -u origin master

How to extract the decimal part from a floating point number in C?

I think that using string is the correct way to go in this case, since you don't know a priori the number of digits in the decimal part. But, it won't work for all cases (e.g. 1.005), as mentioned before by @SingleNegationElimination. Here is my take on this:

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

int main(void)
{
    char s_value[60], s_integral[60], s_fractional[60];
    int i, found = 0, count = 1, integral, fractional;

    scanf("%s", s_value);

    for (i = 0; s_value[i] != '\0'; i++)
    {
        if (!found)
        {
            if (s_value[i] == '.')
            {
                found = 1;
                s_integral[i] = '\0';
                continue;
            }
            s_integral[i] = s_value[i];
            count++;
        }
        else
            s_fractional[i - count] = s_value[i];
    }
    s_fractional[i - count] = '\0';

    integral = atoi(s_integral);
    fractional = atoi(s_fractional);
    printf("value = %s, integral = %d, fractional = %d\n",
        s_value, integral, fractional);

    return 0;
}

Python, TypeError: unhashable type: 'list'

The problem is that you can't use a list as the key in a dict, since dict keys need to be immutable. Use a tuple instead.

This is a list:

[x, y]

This is a tuple:

(x, y)

Note that in most cases, the ( and ) are optional, since , is what actually defines a tuple (as long as it's not surrounded by [] or {}, or used as a function argument).

You might find the section on tuples in the Python tutorial useful:

Though tuples may seem similar to lists, they are often used in different situations and for different purposes. Tuples are immutable, and usually contain an heterogeneous sequence of elements that are accessed via unpacking (see later in this section) or indexing (or even by attribute in the case of namedtuples). Lists are mutable, and their elements are usually homogeneous and are accessed by iterating over the list.

And in the section on dictionaries:

Unlike sequences, which are indexed by a range of numbers, dictionaries are indexed by keys, which can be any immutable type; strings and numbers can always be keys. Tuples can be used as keys if they contain only strings, numbers, or tuples; if a tuple contains any mutable object either directly or indirectly, it cannot be used as a key. You can’t use lists as keys, since lists can be modified in place using index assignments, slice assignments, or methods like append() and extend().

In case you're wondering what the error message means, it's complaining because there's no built-in hash function for lists (by design), and dictionaries are implemented as hash tables.

Android Studio doesn't recognize my device

In addition to the above configurations, I had to set deployment target to "Open Select Deployment Target Dialog", run once (choosing my device from the options listed), and from then on Android Studio was able to see my device even after changing the deployment setting back to "USB Device". My SWAG is that since Android Studio uses its own internal cache to find your device, it has to be initialized first.

Get Excel sheet name and use as variable in macro

in a Visual Basic Macro you would use

pName = ActiveWorkbook.Path      ' the path of the currently active file
wbName = ActiveWorkbook.Name     ' the file name of the currently active file
shtName = ActiveSheet.Name       ' the name of the currently selected worksheet

The first sheet in a workbook can be referenced by

ActiveWorkbook.Worksheets(1)

so after deleting the [Report] tab you would use

ActiveWorkbook.Worksheets("Report").Delete
shtName = ActiveWorkbook.Worksheets(1).Name

to "work on that sheet later on" you can create a range object like

Dim MySheet as Range
MySheet = ActiveWorkbook.Worksheets(shtName).[A1]

and continue working on MySheet(rowNum, colNum) etc. ...

shortcut creation of a range object without defining shtName:

Dim MySheet as Range
MySheet = ActiveWorkbook.Worksheets(1).[A1]

Create a unique number with javascript time

This can be achieved simply with the following code:

var date = new Date();
var components = [
    date.getYear(),
    date.getMonth(),
    date.getDate(),
    date.getHours(),
    date.getMinutes(),
    date.getSeconds(),
    date.getMilliseconds()
];

var id = components.join("");

Constructor overloading in Java - best practice

Well, here's an example for overloaded constructors.

public class Employee
{
   private String name;
   private int age;

   public Employee()
   {
      System.out.println("We are inside Employee() constructor");
   }

   public Employee(String name)
   {
      System.out.println("We are inside Employee(String name) constructor");
      this.name = name;
   }

   public Employee(String name, int age)
   {
      System.out.println("We are inside Employee(String name, int age) constructor");
      this.name = name;
      this.age = age;
   }

   public Employee(int age)
   {
      System.out.println("We are inside Employee(int age) constructor");
      this.age = age; 
   }

   public String getName()
   {
      return name;
   }

   public void setName(String name)
   {
      this.name = name;
   }

   public int getAge()
   {
      return age;
   }

   public void setAge(int age)
   {
      this.age = age;
   }
}

In the above example you can see overloaded constructors. Name of the constructors is same but each constructors has different parameters.

Here are some resources which throw more light on constructor overloading in java,

Constructors.

Constructor explanation.

how to remove pagination in datatable

Here is an alternative that is an incremental improvement on several other answers. Assuming settings.aLengthMenu is not multi-dimensional (it can be when DataTables has row lengths and labels) and the data will not change after page load (for simple DOM-loaded DataTables), this function can be inserted to eliminate paging. It hides several paging-related classes.

Perhaps more robust would be setting paging to false inside the function below, however I don't see an API call for that off-hand.

$('#myTable').on('init.dt', function(evt, settings) {
    if (settings && settings.aLengthMenu && settings.fnRecordsTotal && settings.fnRecordsTotal() < settings.aLengthMenu[0]) {
        // hide pagination controls, fewer records than minimum length
        $(settings.nTableWrapper).find('.dataTables_paginate, .dataTables_length, .dataTables_info').hide();
    }
}).DataTable();

What's the difference between console.dir and console.log?

None of the 7 prior answers mentioned that console.dir supports extra arguments: depth, showHidden, and whether to use colors.

Of particular interest is depth, which (in theory) allows travering objects into more than the default 2 levels that console.log supports.

I wrote "in theory" because in practice when I had a Mongoose object and ran console.log(mongoose) and console.dir(mongoose, { depth: null }), the output was the same. What actually recursed deeply into the mongoose object was using util.inspect:

import * as util from 'util';
console.log(util.inspect(myObject, {showHidden: false, depth: null}));

Programs & Examples On #Onkeyup

Count characters in textarea

What are the options for (keyup) in Angular2?

CSS/HTML: Create a glowing border around an Input Field

PermGen elimination in JDK 8

How to set-up a favicon?

Given a DateTime object, how do I get an ISO 8601 date in string format?

force client disconnect from server with socket.io and nodejs

How to install PyQt5 on Windows?

How to install python modules without root access?

How to declare a static const char* in your header file?

how to update the multiple rows at a time using linq to sql?

Android Completely transparent Status Bar?

Datetime in where clause

Incrementing in C++ - When to use x++ or ++x?

Notice: Array to string conversion in

Make a table fill the entire window

Margin while printing html page

Programmatically Hide/Show Android Soft Keyboard

Make $JAVA_HOME easily changable in Ubuntu

Is there any way to set environment variables in Visual Studio Code?

Specifying width and height as percentages without skewing photo proportions in HTML

JQuery addclass to selected div, remove class if another div is selected

Tomcat base URL redirection

Is there a way to cache GitHub credentials for pushing commits?

Show row number in row header of a DataGridView

Finding the max value of an attribute in an array of objects

Find the object whose property "Y" has the greatest value in an array of objects

How to use SVN, Branch? Tag? Trunk?

Which version of CodeIgniter am I currently using?

How to test multiple variables against a value?

rsync error: failed to set times on "/foo/bar": Operation not permitted

'pip' is not recognized as an internal or external command

CSS container div not getting height

What is the meaning of "$" sign in JavaScript

gpg: no valid OpenPGP data found

What's the difference between next() and nextLine() methods from Scanner class?

RunAs A different user when debugging in Visual Studio

Use own username/password with git and bitbucket

Using ConfigurationManager to load config from an arbitrary location

Video streaming over websockets using JavaScript

jQuery first child of "this"

npm not working after clearing cache

How to change Named Range Scope

Hibernate: hbm2ddl.auto=update in production?

Making Enter key on an HTML form submit instead of activating button

shorthand If Statements: C#

Installing Git on Eclipse

Passing parameter to controller action from a Html.ActionLink

Updating the list view when the adapter data changes

Decimal values in SQL for dividing results

How to print spaces in Python?

jquery - How to determine if a div changes its height or any css attribute?

How to use a WSDL file to create a WCF service (not make a call)

Set color of text in a Textbox/Label to Red and make it bold in asp.net C#

How to create Select List for Country and States/province in MVC

What is dynamic programming?

Convert NULL to empty string - Conversion failed when converting from a character string to uniqueidentifier

How to convert number of minutes to hh:mm format in TSQL?

decompiling DEX into Java sourcecode

How to remove all namespaces from XML with C#?

Class

Usage

How to delete SQLite database from Android programmatically

How to split a file into equal parts, without breaking individual lines?

How to remove duplicate values from an array in PHP

What is the difference between spark.sql.shuffle.partitions and spark.default.parallelism?

Java regex email

Java: How To Call Non Static Method From Main Method?

Unable to establish SSL connection upon wget on Ubuntu 14.04 LTS

How to output oracle sql result into a file in windows?

How to clear basic authentication details in chrome

What is the 'dynamic' type in C# 4.0 used for?

Pass arguments to Constructor in VBA

Percentage Height HTML 5/CSS

How do I use HTML as the view engine in Express?

Why does JPA have a @Transient annotation?

Installing Apache Maven Plugin for Eclipse

Property getters and setters

Update: Swift 4