You haven't declared returnImage as any kind of variable :)

This should help:

public Image byteArrayToImage(byte[] byteArrayIn)
{
    try
    {
        MemoryStream ms = new MemoryStream(byteArrayIn,0,byteArrayIn.Length);
        ms.Write(byteArrayIn, 0, byteArrayIn.Length);
        Image returnImage = Image.FromStream(ms,true);
    }
    catch { }
    return returnImage;
}

The ByteBuffer class is important because it forms a basis for the use of channels in Java. ByteBuffer class defines six categories of operations upon byte buffers, as stated in the Java 7 documentation:

• Absolute and relative get and put methods that read and write single bytes;

• Relative bulk get methods that transfer contiguous sequences of bytes from this buffer into an array;

• Relative bulk put methods that transfer contiguous sequences of bytes from a byte array or some other byte buffer into this buffer;

• Absolute and relative get and put methods that read and write values of other primitive types, translating them to and from sequences of bytes in a particular byte order;

• Methods for creating view buffers, which allow a byte buffer to be viewed as a buffer containing values of some other primitive type; and

• Methods for compacting, duplicating, and slicing a byte buffer.

Example code : Putting Bytes into a buffer.

    // Create an empty ByteBuffer with a 10 byte capacity
    ByteBuffer bbuf = ByteBuffer.allocate(10);

    // Get the buffer's capacity
    int capacity = bbuf.capacity(); // 10

    // Use the absolute put(int, byte).
    // This method does not affect the position.
    bbuf.put(0, (byte)0xFF); // position=0

    // Set the position
    bbuf.position(5);

    // Use the relative put(byte)
    bbuf.put((byte)0xFF);

    // Get the new position
    int pos = bbuf.position(); // 6

    // Get remaining byte count
    int rem = bbuf.remaining(); // 4

    // Set the limit
    bbuf.limit(7); // remaining=1

    // This convenience method sets the position to 0
    bbuf.rewind(); // remaining=7

As simple as that

  private static byte[] getByteArrayFromByteBuffer(ByteBuffer byteBuffer) {
    byte[] bytesArray = new byte[byteBuffer.remaining()];
    byteBuffer.get(bytesArray, 0, bytesArray.length);
    return bytesArray;
}

Answer by Adamski is a good one and describes the steps in an encoding operation when using the general encode method (that takes a byte buffer as one of the inputs)

However, the method in question (in this discussion) is a variant of encode - encode(CharBuffer in). This is a convenience method that implements the entire encoding operation. (Please see java docs reference in P.S.)

As per the docs, This method should therefore not be invoked if an encoding operation is already in progress (which is what is happening in ZenBlender's code -- using static encoder/decoder in a multi threaded environment).

Personally, I like to use convenience methods (over the more general encode/decode methods) as they take away the burden by performing all the steps under the covers.

ZenBlender and Adamski have already suggested multiple ways options to safely do this in their comments. Listing them all here:

• Create a new encoder/decoder object when needed for each operation (not efficient as it could lead to a large number of objects). OR,
• Use a ThreadLocal to avoid creating new encoder/decoder for each operation. OR,
• Synchronize the entire encoding/decoding operation (this might not be preferred unless sacrificing some concurrency is ok for your program)

P.S.

java docs references:

1. Encode (convenience) method: http://docs.oracle.com/javase/6/docs/api/java/nio/charset/CharsetEncoder.html#encode%28java.nio.CharBuffer%29
2. General encode method: http://docs.oracle.com/javase/6/docs/api/java/nio/charset/CharsetEncoder.html#encode%28java.nio.CharBuffer,%20java.nio.ByteBuffer,%20boolean%29

CompressFormat is too slow...

Try ByteBuffer.

???Bitmap to byte???

width = bitmap.getWidth();
height = bitmap.getHeight();

int size = bitmap.getRowBytes() * bitmap.getHeight();
ByteBuffer byteBuffer = ByteBuffer.allocate(size);
bitmap.copyPixelsToBuffer(byteBuffer);
byteArray = byteBuffer.array();

???byte to bitmap???

Bitmap.Config configBmp = Bitmap.Config.valueOf(bitmap.getConfig().name());
Bitmap bitmap_tmp = Bitmap.createBitmap(width, height, configBmp);
ByteBuffer buffer = ByteBuffer.wrap(byteArray);
bitmap_tmp.copyPixelsFromBuffer(buffer);

General idea

Option 1: Load both images as arrays (scipy.misc.imread) and calculate an element-wise (pixel-by-pixel) difference. Calculate the norm of the difference.

Option 2: Load both images. Calculate some feature vector for each of them (like a histogram). Calculate distance between feature vectors rather than images.

However, there are some decisions to make first.

Questions

You should answer these questions first:

• Are images of the same shape and dimension?

  If not, you may need to resize or crop them. PIL library will help to do it in Python.

  If they are taken with the same settings and the same device, they are probably the same.

• Are images well-aligned?

  If not, you may want to run cross-correlation first, to find the best alignment first. SciPy has functions to do it.

  If the camera and the scene are still, the images are likely to be well-aligned.

• Is exposure of the images always the same? (Is lightness/contrast the same?)

  If not, you may want to normalize images.

  But be careful, in some situations this may do more wrong than good. For example, a single bright pixel on a dark background will make the normalized image very different.

• Is color information important?

  If you want to notice color changes, you will have a vector of color values per point, rather than a scalar value as in gray-scale image. You need more attention when writing such code.

• Are there distinct edges in the image? Are they likely to move?

  If yes, you can apply edge detection algorithm first (e.g. calculate gradient with Sobel or Prewitt transform, apply some threshold), then compare edges on the first image to edges on the second.

• Is there noise in the image?

  All sensors pollute the image with some amount of noise. Low-cost sensors have more noise. You may wish to apply some noise reduction before you compare images. Blur is the most simple (but not the best) approach here.

• What kind of changes do you want to notice?

  This may affect the choice of norm to use for the difference between images.

  Consider using Manhattan norm (the sum of the absolute values) or zero norm (the number of elements not equal to zero) to measure how much the image has changed. The former will tell you how much the image is off, the latter will tell only how many pixels differ.

Example

I assume your images are well-aligned, the same size and shape, possibly with different exposure. For simplicity, I convert them to grayscale even if they are color (RGB) images.

You will need these imports:

import sys

from scipy.misc import imread
from scipy.linalg import norm
from scipy import sum, average

Main function, read two images, convert to grayscale, compare and print results:

def main():
    file1, file2 = sys.argv[1:1+2]
    # read images as 2D arrays (convert to grayscale for simplicity)
    img1 = to_grayscale(imread(file1).astype(float))
    img2 = to_grayscale(imread(file2).astype(float))
    # compare
    n_m, n_0 = compare_images(img1, img2)
    print "Manhattan norm:", n_m, "/ per pixel:", n_m/img1.size
    print "Zero norm:", n_0, "/ per pixel:", n_0*1.0/img1.size

How to compare. img1 and img2 are 2D SciPy arrays here:

def compare_images(img1, img2):
    # normalize to compensate for exposure difference, this may be unnecessary
    # consider disabling it
    img1 = normalize(img1)
    img2 = normalize(img2)
    # calculate the difference and its norms
    diff = img1 - img2  # elementwise for scipy arrays
    m_norm = sum(abs(diff))  # Manhattan norm
    z_norm = norm(diff.ravel(), 0)  # Zero norm
    return (m_norm, z_norm)

If the file is a color image, imread returns a 3D array, average RGB channels (the last array axis) to obtain intensity. No need to do it for grayscale images (e.g. .pgm):

def to_grayscale(arr):
    "If arr is a color image (3D array), convert it to grayscale (2D array)."
    if len(arr.shape) == 3:
        return average(arr, -1)  # average over the last axis (color channels)
    else:
        return arr

Normalization is trivial, you may choose to normalize to [0,1] instead of [0,255]. arr is a SciPy array here, so all operations are element-wise:

def normalize(arr):
    rng = arr.max()-arr.min()
    amin = arr.min()
    return (arr-amin)*255/rng

Run the main function:

if __name__ == "__main__":
    main()

Now you can put this all in a script and run against two images. If we compare image to itself, there is no difference:

$ python compare.py one.jpg one.jpg
Manhattan norm: 0.0 / per pixel: 0.0
Zero norm: 0 / per pixel: 0.0

If we blur the image and compare to the original, there is some difference:

$ python compare.py one.jpg one-blurred.jpg 
Manhattan norm: 92605183.67 / per pixel: 13.4210411116
Zero norm: 6900000 / per pixel: 1.0

P.S. Entire compare.py script.

Update: relevant techniques

As the question is about a video sequence, where frames are likely to be almost the same, and you look for something unusual, I'd like to mention some alternative approaches which may be relevant:

• background subtraction and segmentation (to detect foreground objects)
• sparse optical flow (to detect motion)
• comparing histograms or some other statistics instead of images

I strongly recommend taking a look at “Learning OpenCV” book, Chapters 9 (Image parts and segmentation) and 10 (Tracking and motion). The former teaches to use Background subtraction method, the latter gives some info on optical flow methods. All methods are implemented in OpenCV library. If you use Python, I suggest to use OpenCV = 2.3, and its cv2 Python module.

The most simple version of the background subtraction:

• learn the average value µ and standard deviation s for every pixel of the background
• compare current pixel values to the range of (µ-2s,µ+2s) or (µ-s,µ+s)

More advanced versions make take into account time series for every pixel and handle non-static scenes (like moving trees or grass).

The idea of optical flow is to take two or more frames, and assign velocity vector to every pixel (dense optical flow) or to some of them (sparse optical flow). To estimate sparse optical flow, you may use Lucas-Kanade method (it is also implemented in OpenCV). Obviously, if there is a lot of flow (high average over max values of the velocity field), then something is moving in the frame, and subsequent images are more different.

Comparing histograms may help to detect sudden changes between consecutive frames. This approach was used in Courbon et al, 2010:

Similarity of consecutive frames. The distance between two consecutive frames is measured. If it is too high, it means that the second frame is corrupted and thus the image is eliminated. The Kullback–Leibler distance, or mutual entropy, on the histograms of the two frames:

where p and q are the histograms of the frames is used. The threshold is fixed on 0.2.

For me, ctrl + m is used to save the webpage as png, so it does not work properly. But I find another way.

On the toolbar, there is a bottom named open the command paletee, you can click it and type in the line, and you can see the toggle cell line number here.

Addition to Mark Byers answer :

Sometimes you also want to insert Hardcoded details else there may be Unique constraint fail etc. So use following in such situation where you override some values of the columns.

INSERT INTO matrimony_domain_details (domain, type, logo_path)
SELECT 'www.example.com', type, logo_path
FROM matrimony_domain_details
WHERE id = 367

Here domain value is added by me me in Hardcoded way to get rid from Unique constraint.

Works in Python 2.7 and higher including python3:

result = bytearray.fromhex('deadbeef')

Note: There seems to be a bug with the bytearray.fromhex() function in Python 2.6. The python.org documentation states that the function accepts a string as an argument, but when applied, the following error is thrown:

>>> bytearray.fromhex('B9 01EF')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: fromhex() argument 1 must be unicode, not str`

You can change the format using the date() and the strtotime().

$date = '9/18/2019';

echo date('d-m-y',strtotime($date));

Result:

18-09-19

We can change the format by changing the ( d-m-y ).

1. About onCreate() and onUpgrade()

onCreate(..) is called whenever the app is freshly installed. onUpgrade is called whenever the app is upgraded and launched and the database version is not the same.

2. Incrementing the db version

You need a constructor like:

MyOpenHelper(Context context) {
   super(context, "dbname", null, 2); // 2 is the database version
}

IMPORTANT: Incrementing the app version alone is not enough for onUpgrade to be called!

3. Don't forget your new users!

Don't forget to add

database.execSQL(DATABASE_CREATE_color);

to your onCreate() method as well or newly installed apps will lack the table.

4. How to deal with multiple database changes over time

When you have successive app upgrades, several of which have database upgrades, you want to be sure to check oldVersion:

onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
   switch(oldVersion) {
   case 1:
       db.execSQL(DATABASE_CREATE_color);
       // we want both updates, so no break statement here...
   case 2:
       db.execSQL(DATABASE_CREATE_someothertable); 
   }
}

This way when a user upgrades from version 1 to version 3, they get both updates. When a user upgrades from version 2 to 3, they just get the revision 3 update... After all, you can't count on 100% of your user base to upgrade each time you release an update. Sometimes they skip an update or 12 :)

5. Keeping your revision numbers under control while developing

And finally... calling

adb uninstall <yourpackagename>

totally uninstalls the app. When you install again, you are guaranteed to hit onCreate which keeps you from having to keep incrementing the database version into the stratosphere as you develop...

\d*\.\d*

Explanation:

\d* - any number of digits

\. - a dot

\d* - more digits.

This will match 123.456, .123, 123., but not 123

If you want the dot to be optional, in most languages (don't know about jquery) you can use

\d*\.?\d*

To expand on what @JoshuaMaddox said, in the MDN Learning Area, under the "Introduction to HTML" section, the Document and website structure sub-section says (bold/emphasis is by me):

Header

Usually a big strip across the top with a big heading and/or logo. This is where the main common information about a website usually stays from one webpage to another.

Navigation bar

Links to the site's main sections; usually represented by menu buttons, links, or tabs. Like the header, this content usually remains consistent from one webpage to another — having an inconsistent navigation on your website will just lead to confused, frustrated users. Many web designers consider the navigation bar to be part of the header rather than a individual component, but that's not a requirement; in fact some also argue that having the two separate is better for accessibility, as screen readers can read the two features better if they are separate.

Very close! In your select expression, you have to use a pipe (|) before contains.

This filter produces the expected output.

. - map(select(.Names[] | contains ("data"))) | .[] .Id

The jq Cookbook has an example of the syntax.

Filter objects based on the contents of a key

E.g., I only want objects whose genre key contains "house".

$ json='[{"genre":"deep house"}, {"genre": "progressive house"}, {"genre": "dubstep"}]'
$ echo "$json" | jq -c '.[] | select(.genre | contains("house"))'
{"genre":"deep house"}
{"genre":"progressive house"}

Colin D asks how to preserve the JSON structure of the array, so that the final output is a single JSON array rather than a stream of JSON objects.

The simplest way is to wrap the whole expression in an array constructor:

$ echo "$json" | jq -c '[ .[] | select( .genre | contains("house")) ]'
[{"genre":"deep house"},{"genre":"progressive house"}]

You can also use the map function:

$ echo "$json" | jq -c 'map(select(.genre | contains("house")))'
[{"genre":"deep house"},{"genre":"progressive house"}]

map unpacks the input array, applies the filter to every element, and creates a new array. In other words, map(f) is equivalent to [.[]|f].

I had input type text field in a table row field. I am targeting it with code

.admin_table input[type=text]:focus
{
    background-color: #FEE5AC;
}

Another alternative is to re-run the JRE setup. It typically installs a default JRE by placing java.exe, javaw.exe, etc. in your system folder. That would place the executables in your path, which should be sufficient, based on the note in the error message that it searched your path for javaw.exe

Ideally the pivot should be the middle value in the entire array. This will reduce the chances of getting worst case performance.

@(ViewContext.RouteData.Values["parameterName"])

worked with ROUTE PARAM.

Request.Params["paramName"]

did not work with ROUTE PARAM.

It's entirely possible in browser-side javascript.

The easy way:

The readAsDataURL() method might already encode it as base64 for you. You'll probably need to strip out the beginning stuff (up to the first ,), but that's no biggie. This would take all the fun out though.

The hard way:

If you want to try it the hard way (or it doesn't work), look at readAsArrayBuffer(). This will give you a Uint8Array and you can use the method specified. This is probably only useful if you want to mess with the data itself, such as manipulating image data or doing other voodoo magic before you upload.

There are two methods:

• Convert to string and use the built-in btoa or similar
  • I haven't tested all cases, but works for me- just get the char-codes
• Convert directly from a Uint8Array to base64

I recently implemented tar in the browser. As part of that process, I made my own direct Uint8Array->base64 implementation. I don't think you'll need that, but it's here if you want to take a look; it's pretty neat.

What I do now:

The code for converting to string from a Uint8Array is pretty simple (where buf is a Uint8Array):

function uint8ToString(buf) {
    var i, length, out = '';
    for (i = 0, length = buf.length; i < length; i += 1) {
        out += String.fromCharCode(buf[i]);
    }
    return out;
}

From there, just do:

var base64 = btoa(uint8ToString(yourUint8Array));

Base64 will now be a base64-encoded string, and it should upload just peachy. Try this if you want to double check before pushing:

window.open("data:application/octet-stream;base64," + base64);

This will download it as a file.

Other info:

To get the data as a Uint8Array, look at the MDN docs:

• https://developer.mozilla.org/en/DOM/FileReader

Use make (chan int) instead of nil. The first value has to be the same type that your map holds.

package main

import "fmt"

func main() {

    var sessions = map[string] chan int{}
    sessions["somekey"] = make(chan int)

    fmt.Printf ("%d\n", len(sessions)) // 1

    // Remove somekey's value from sessions
    delete(sessions, "somekey")

    fmt.Printf ("%d\n", len(sessions)) // 0
}

UPDATE: Corrected my answer.

You can use canActive in your routes, like so:

import { Injectable } from '@angular/core';
import { Router } from '@angular/router';
import { CanActivate } from '@angular/router';
import { AuthService } from './auth.service';

@Injectable()
export class AuthGuard implements CanActivate {

  constructor(private auth: AuthService, private router: Router) {}

  canActivate() {
    // If user is not logged in we'll send them to the homepage 
    if (!this.auth.loggedIn()) {
      this.router.navigate(['']);
      return false;
    }
    return true;
  }

}

const appRoutes: Routes = [
  {
    path: '', redirectTo: '/deals', pathMatch: 'full'
  },
  {
    path: 'special',
    component: PrivateDealsComponent,
    /* We'll use the canActivate API and pass in our AuthGuard.
       Now any time the /special route is hit, the AuthGuard will run
       first to make sure the user is logged in before activating and
       loading this route. */
    canActivate: [AuthGuard]
  }
];

Taken from: https://auth0.com/blog/angular-2-authentication

Sharing my methods in case someone needs them:

 /** Determines if the context calling has the required permission
 * @param context - the IPC context
 * @param permissions - The permissions to check
 * @return true if the IPC has the granted permission
 */
public static boolean hasPermission(Context context, String permission) {

    int res = context.checkCallingOrSelfPermission(permission);

    Log.v(TAG, "permission: " + permission + " = \t\t" + 
    (res == PackageManager.PERMISSION_GRANTED ? "GRANTED" : "DENIED"));

    return res == PackageManager.PERMISSION_GRANTED;

}

/** Determines if the context calling has the required permissions
 * @param context - the IPC context
 * @param permissions - The permissions to check
 * @return true if the IPC has the granted permission
 */
public static boolean hasPermissions(Context context, String... permissions) {

    boolean hasAllPermissions = true;

    for(String permission : permissions) {
        //you can return false instead of assigning, but by assigning you can log all permission values
        if (! hasPermission(context, permission)) {hasAllPermissions = false; }
    }

    return hasAllPermissions;

}

And to call it:

boolean hasAndroidPermissions = SystemUtils.hasPermissions(mContext, new String[] {
                android.Manifest.permission.ACCESS_WIFI_STATE,
                android.Manifest.permission.READ_PHONE_STATE,
                android.Manifest.permission.ACCESS_NETWORK_STATE,
                android.Manifest.permission.INTERNET,
        });

Generally it's not recommended to gather statistics so frequent on the whole database unless you have a strong justification for that, such as a bulk insert or big data change happen frequently on the database. gathering statistics on the database in this frequency MAY change the queries execution plan to a new poor execution plans, the thing may cost you much time trying to tune every query affected by the new poor plans, this is why you should test the impact of gathering new statistics on a test database, or in case you don't have the time or the man power for that, at least you should keep a fallback plan by backing up the original statics before you gather new ones, so in case you gather a new statistics and then the queries didn't perform as expected, you can easily restore back the original statistics.

There is a very useful script can help you backup original statistics and gather new ones and provide you with SQL command you can use to restore back the original statics in case the thing didn't go as expected after gathering new statistics. You can find the script in this link: http://dba-tips.blogspot.com/2014/09/script-to-ease-gathering-statistics-on.html

By using FusedLocationProviderApi which is the latest API and the best among the available possibilities to get location in Android. add this in build.gradle file

dependencies {
    compile 'com.google.android.gms:play-services:6.5.87'
}

you can get full source code by this url http://javapapers.com/android/android-location-fused-provider/

By default, Button in android provides all caps keyword. If you want button text to be in lower case or mixed case you can disable textAllCaps flag using android:textAllCaps="false"

Taken from this answer.

1. Close your packages.config file.
2. Build
3. Warning is gone!

This is the first time I see ignoring a problem actually makes it go away...

Edit in 2020: if you are viewing this warning, consider upgrading to PackageReference if you can

 .navbar-nav > li > a {padding-top:7px !important; padding-bottom:7px !important;}
.navbar {min-height:32px !important;} 
.navbar-brand{padding-top:7px !important; max-height: 24px;  }
.navbar .navbar-toggle {  margin-top: 0px; margin-bottom: 0px; padding: 8px 9px; }

Full Example (Python 3):
For Python 2.x look into Note below

import re

mylist = ["dog", "cat", "wildcat", "thundercat", "cow", "hooo"]
r = re.compile(".*cat")
newlist = list(filter(r.match, mylist)) # Read Note
print(newlist)

Prints:

['cat', 'wildcat', 'thundercat']

Note:

For Python 2.x developers, filter returns a list already. In Python 3.x filter was changed to return an iterator so it has to be converted to list (in order to see it printed out nicely).

Python 3 code example
Python 2.x code example

Here is the utility I wrote to generate a simple setup.py file (template) with useful comments and links. I hope, it will be useful.

Installation

sudo pip install setup-py-cli

Usage

To generate setup.py file just type in the terminal.

setup-py

Now setup.py file should occur in the current directory.

Generated setup.py

from distutils.core import setup
from setuptools import find_packages
import os


# User-friendly description from README.md
current_directory = os.path.dirname(os.path.abspath(__file__))
try:
    with open(os.path.join(current_directory, 'README.md'), encoding='utf-8') as f:
        long_description = f.read()
except Exception:
    long_description = ''

setup(
    # Name of the package
    name=<name of current directory>,

    # Packages to include into the distribution
    packages=find_packages('.'), 

    # Start with a small number and increase it with every change you make
    # https://semver.org
    version='1.0.0',

    # Chose a license from here: https://help.github.com/articles/licensing-a-repository
    # For example: MIT
    license='',

    # Short description of your library
    description='',

    # Long description of your library
    long_description = long_description,
    long_description_context_type = 'text/markdown',

    # Your name
    author='', 

    # Your email
    author_email='',     

    # Either the link to your github or to your website
    url='',

    # Link from which the project can be downloaded
    download_url='',

    # List of keyword arguments
    keywords=[],

    # List of packages to install with this one
    install_requires=[],

    # https://pypi.org/classifiers/
    classifiers=[]  
)

Content of the generated setup.py:

• automatically fulfilled package name based on the name of the current directory.
• some basic fields to fulfill.
• clarifying comments and links to useful resources.
• automatically inserted description from README.md or an empty string if there is no README.md.

Here is the link to the repository. Fill free to enhance the solution.

I've been using some simple CSS and it seems to remove them and work fine.

input[type=number]::-webkit-inner-spin-button, _x000D_
input[type=number]::-webkit-outer-spin-button { _x000D_
    -webkit-appearance: none;_x000D_
    -moz-appearance: none;_x000D_
    appearance: none;_x000D_
    margin: 0; _x000D_
}

<input type="number" step="0.01"/>

This tutorial from CSS Tricks explains in detail & also shows how to style them

One way is to use the multiple class selector (no space as that is the descendant selector):

.reMode_hover:not(.reMode_selected):hover _x000D_
{_x000D_
   background-color: #f0ac00;_x000D_
}

<a href="" title="Design" class="reMode_design  reMode_hover">_x000D_
    <span>Design</span>_x000D_
</a>_x000D_
_x000D_
<a href="" title="Design" _x000D_
 class="reMode_design  reMode_hover reMode_selected">_x000D_
    <span>Design</span>_x000D_
</a>

Try changing your Content Type (media type) to application/x-download and your Content-Disposition to: attachment;filename=" + fileName;

response.setContentType("application/x-download");
response.setHeader("Content-disposition", "attachment; filename=" + fileName);

Make sure if your table doesn't already have rows whose Primary Key values are same as the the Primary Key Id in your Query.

super.MyMethod() should be called inside the MyMethod() of the class B. So it should be as follows

class A {
    public void myMethod() { /* ... */ }
}

class B extends A {
    public void myMethod() { 
        super.MyMethod();
        /* Another code */ 
    }
}

If you kept default configurations when running hadoop the port for the namenode would be 50070. You will need to find any processes running on this port and kill them first.

• Stop all running hadoop with : bin/stop-all.sh

  check all processes running in port 50070

• sudo netstat -tulpn | grep :50070 #check any processes running in port 50070, if there are any the / will appear at the RHS of the output.

• sudo kill -9 <process_id> #kill_the_process.

• sudo rm -r /app/hadoop/tmp #delete the temp folder

• sudo mkdir /app/hadoop/tmp #recreate it

• sudo chmod 777 –R /app/hadoop/tmp (777 is given for this example purpose only)

• bin/hadoop namenode –format #format hadoop namenode

• bin/start-all.sh #start-all hadoop services

Refer this blog

Okay, first a few terms slightly oversimplified.

In git, a tag (like many other things) is what's called a treeish. It's a way of referring to a point in in the history of the project. Treeishes can be a tag, a commit, a date specifier, an ordinal specifier or many other things.

Now a branch is just like a tag but is movable. When you are "on" a branch and make a commit, the branch is moved to the new commit you made indicating it's current position.

Your HEAD is pointer to a branch which is considered "current". Usually when you clone a repository, HEAD will point to master which in turn will point to a commit. When you then do something like git checkout experimental, you switch the HEAD to point to the experimental branch which might point to a different commit.

Now the explanation.

When you do a git checkout v2.0, you are switching to a commit that is not pointed to by a branch. The HEAD is now "detached" and not pointing to a branch. If you decide to make a commit now (as you may), there's no branch pointer to update to track this commit. Switching back to another commit will make you lose this new commit you've made. That's what the message is telling you.

Usually, what you can do is to say git checkout -b v2.0-fixes v2.0. This will create a new branch pointer at the commit pointed to by the treeish v2.0 (a tag in this case) and then shift your HEAD to point to that. Now, if you make commits, it will be possible to track them (using the v2.0-fixes branch) and you can work like you usually would. There's nothing "wrong" with what you've done especially if you just want to take a look at the v2.0 code. If however, you want to make any alterations there which you want to track, you'll need a branch.

You should spend some time understanding the whole DAG model of git. It's surprisingly simple and makes all the commands quite clear.

This is the simple version, obviously you'll want to add some error checking:

var obj = {};
var pairs = queryString.split('&');
for(i in pairs){
    var split = pairs[i].split('=');
    obj[decodeURIComponent(split[0])] = decodeURIComponent(split[1]);
}

A string can be escaped comprehensively and compactly using JSON.stringify. It is part of JavaScript as of ECMAScript 5 and supported by major newer browser versions.

str = JSON.stringify(String(str));
str = str.substring(1, str.length-1);

Using this approach, also special chars as the null byte, unicode characters and line breaks \r and \n are escaped properly in a relatively compact statement.

Since I don't find a simple answer just adding more this will be JSP page. save this content to a jsp file once you run you can see the values of the selected displayed.

Update: save the file as test.jsp and run it on any web/app server

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
<%@ page import="java.lang.*" %>
<%@ page import="java.io.*" %>
<% String[] a = request.getParameterValues("multiple");
if(a!=null)
{
for(int i=0;i<a.length;i++){
//out.println(Integer.parseInt(a[i])); //If integer
out.println(a[i]);
}}
%>
<html>
<body>
<form action="test.jsp" method="get">
<select name="multiple" multiple="multiple"><option value="1">1</option><option value="2">2</option><option value="3">3</option></select>
<input type="submit">
</form>
</body>
</html>

// variable declaration
TextToSpeech tts;

// TextToSpeech initialization, must go within the onCreate method
tts = new TextToSpeech(getActivity(), new TextToSpeech.OnInitListener() {
 @Override
 public void onInit(int i) {
  if (i == TextToSpeech.SUCCESS) {
   int result = tts.setLanguage(Locale.US);
   if (result == TextToSpeech.LANG_MISSING_DATA ||
    result == TextToSpeech.LANG_NOT_SUPPORTED) {
    Log.e("TTS", "Lenguage not supported");
   }
  } else {
   Log.e("TTS", "Initialization failed");
  }
 }
});

// method call
public void buttonSpeak().setOnClickListener(new View.OnClickListener() {
 @Override
 public void onClick(View view) {
  speak();
 }
});
}

private void speak() {
 tts.speak("Text to Speech Test", TextToSpeech.QUEUE_ADD, null);
}

@Override
public void onDestroy() {
 if (tts != null) {
  tts.stop();
  tts.shutdown();
 }
 super.onDestroy();
}

taken from: Text to Speech Youtube Tutorial

You could have simply replaced

names[i] = in.nextLine(); with names[i] = in.next();

Using next() will only return what comes before a space. nextLine() automatically moves the scanner down after returning the current line.

I created small tool called luster for downloading list of "likers" and "followers" of your Facebook page.

After download and unpack archive for your platform you can run it from terminal as

luster fans my-page-name

Where my-page-name is string identifier of your Facebook page.

You will be asked for email and password to your Facebook account. Note that this account need to have one of available page roles. Even Analyst is enough.

After while you should receive output similar to following

TIME,KIND,ID,NAME,LINK
1581665652,Like,111111111,John Doe,https://www.facebook.com/111111111
1581663355,Like,222222222,Kal Peterson,https://www.facebook.com/222222222
1581661970,Follow,333333333,Nikol Kus,https://www.facebook.com/333333333

This tool is based on reading table which can be found in Settings -> People and Other Pages section of your Facebook page.

Be aware that there is some limit up to 7k results from Facebook side. I tested it on two pages with more than 20k of fans and didn't get more then 7k results.

See https://github.com/zladovan/luster for details.

Yes, it is. Compute the Fast Fourier Transform and analyse the result. The Fourier transform tells you which frequencies are present in the image. If there is a low amount of high frequencies, then the image is blurry.

Defining the terms 'low' and 'high' is up to you.

Edit:

As stated in the comments, if you want a single float representing the blurryness of a given image, you have to work out a suitable metric.

nikie's answer provide such a metric. Convolve the image with a Laplacian kernel:

   1
1 -4  1
   1

And use a robust maximum metric on the output to get a number which you can use for thresholding. Try to avoid smoothing too much the images before computing the Laplacian, because you will only find out that a smoothed image is indeed blurry :-).

CouchDB 0.11 (released at the end of March) is a feature-freeze release for 1.0. This means we'll be maintaining compatibility with the current API for 1.0, so now is a good time to take another look at CouchDB if you haven't in a while.

The CouchDB 0.11 source code release is available here. There are binary installers and other goodies linked here.

Well, just do what the error message tells you.

Don't call setContentView() before requestFeature().

Note:

As said in comments, for both ActionBarSherlock and AppCompat library, it's necessary to call requestFeature() before super.onCreate()

Crescent Fresh's answer highly-voted answer is misleading. Though his warnings are invalid, there are other limitations that he doesn't address.

First, the reasoning in Crescent's "Caveats:" paragraph doesn't make sense. The explanation implies that coding "a bunch of if (error instanceof MyError) else ..." is somehow burdensome or verbose compared to multiple catch statements. Multiple instanceof statements in a single catch block are just as concise as multiple catch statements-- clean and concise code without any tricks. This is a great way to emulate Java's great throwable-subtype-specific error handling.

WRT "appears the message property of the subclass does not get set", that is not the case if you use a properly constructed Error subclass. To make your own ErrorX Error subclass, just copy the code block beginning with "var MyError =", changing the one word "MyError" to "ErrorX". (If you want to add custom methods to your subclass, follow the sample text).

The real and significant limitation of JavaScript error subclassing is that for JavaScript implementations or debuggers that track and report on stack trace and location-of-instantiation, like FireFox, a location in your own Error subclass implementation will be recorded as the instantiation point of the class, whereas if you used a direct Error, it would be the location where you ran "new Error(...)"). IE users would probably never notice, but users of Fire Bug on FF will see useless file name and line number values reported alongside these Errors, and will have to drill down on the stack trace to element #1 to find the real instantiation location.

You can use += to concatenate strings, for example:

declare @test nvarchar(max)
set @test = ''
select @test += name from names

if you select @test, it will give you all names concatenated

As the following answer describes: Does pandas/scipy/numpy provide a cumulative standard deviation function? The Python Pandas module contains a method to calculate the running or cumulative standard deviation. For that you'll have to convert your data into a pandas dataframe (or a series if it is 1D), but there are functions for that.

If you haven't commit the local changes yet since the last pull/clone, you can use:

git checkout *
git pull

checkout will clear your local changes with the last local commit, and pull will sincronize it to the remote repository

The <video> tag is meant to load in a video of a supported format (which may differ by browser).

YouTube embed links are not just videos, they are typically webpages that contain logic to detect what your user supports and how they can play the youtube video, using HTML5, or flash, or some other plugin based on what is available on the users PC. This is why you are having a difficult time using the video tag with youtube videos.

YouTube does offer a developer API to embed a youtube video into your page.

I made a JSFiddle as a live example: http://jsfiddle.net/zub16fgt/

And you can read more about the YouTube API here: https://developers.google.com/youtube/iframe_api_reference#Getting_Started

The Code can also be found below

In your HTML:

<div id="player"></div>

In your Javascript:

var onPlayerReady = function(event) {
    event.target.playVideo();  
};

// The first argument of YT.Player is an HTML element ID. 
// YouTube API will replace my <div id="player"> tag 
// with an iframe containing the youtube video.

var player = new YT.Player('player', {
    height: 320,
    width: 400,
    videoId : '6Dc1C77nra4',
    events : {
        'onReady' : onPlayerReady
    }
});

Each YouTube video has four generated images. They are predictably formatted as follows:

https://img.youtube.com/vi/<insert-youtube-video-id-here>/0.jpg
https://img.youtube.com/vi/<insert-youtube-video-id-here>/1.jpg
https://img.youtube.com/vi/<insert-youtube-video-id-here>/2.jpg
https://img.youtube.com/vi/<insert-youtube-video-id-here>/3.jpg

The first one in the list is a full size image and others are thumbnail images. The default thumbnail image (i.e., one of 1.jpg, 2.jpg, 3.jpg) is:

https://img.youtube.com/vi/<insert-youtube-video-id-here>/default.jpg

For the high quality version of the thumbnail use a URL similar to this:

https://img.youtube.com/vi/<insert-youtube-video-id-here>/hqdefault.jpg

There is also a medium quality version of the thumbnail, using a URL similar to the HQ:

https://img.youtube.com/vi/<insert-youtube-video-id-here>/mqdefault.jpg

For the standard definition version of the thumbnail, use a URL similar to this:

https://img.youtube.com/vi/<insert-youtube-video-id-here>/sddefault.jpg

For the maximum resolution version of the thumbnail use a URL similar to this:

https://img.youtube.com/vi/<insert-youtube-video-id-here>/maxresdefault.jpg

All of the above URLs are available over HTTP too. Additionally, the slightly shorter hostname i3.ytimg.com works in place of img.youtube.com in the example URLs above.

Alternatively, you can use the YouTube Data API (v3) to get thumbnail images.

I have recently been wrestling with this. My issue was the solutions posted above using the heightForRowAtIndexPath: method would work for iOS 7.1 in the Simulator but then have completely screwed up results by simply switching to iOS 8.1.

I began reading more about self-sizing cells (introduced in iOS 8, read here). It was apparent that the use of UITableViewAutomaticDimension would help in iOS 8. I tried using that technique and deleted the use of heightForRowAtIndexPath: and voila, it was working perfect in iOS 8 now. But then iOS 7 wasn't. What was I to do? I needed heightForRowAtIndexPath: for iOS 7 and not for iOS 8.

Here is my solution (trimmed up for brevity's sake) which borrow's from the answer @JosephH posted above:

- (void)viewDidLoad {
    [super viewDidLoad];

    self.tableView.estimatedRowHeight = 50.;
    self.tableView.rowHeight = UITableViewAutomaticDimension;

    // ...
}

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
    if (SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"8.0")) {
        return UITableViewAutomaticDimension;

    } else {
        NSString *cellIdentifier = [self reuseIdentifierForCellAtIndexPath:indexPath];
        static NSMutableDictionary *heightCache;
        if (!heightCache)
            heightCache = [[NSMutableDictionary alloc] init];
        NSNumber *cachedHeight = heightCache[cellIdentifier];
        if (cachedHeight)
            return cachedHeight.floatValue;

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier];
    CGFloat height = cell.bounds.size.height;
    heightCache[cellIdentifier] = @(height);
    return height;
    }
}

- (NSString *)reuseIdentifierForCellAtIndexPath:(NSIndexPath *)indexPath {
    NSString * reuseIdentifier;
    switch (indexPath.row) {
        case 0:
            reuseIdentifier = EventTitleCellIdentifier;
            break;
        case 2:
            reuseIdentifier = EventDateTimeCellIdentifier;
            break;
        case 4:
            reuseIdentifier = EventContactsCellIdentifier;
            break;
        case 6:
            reuseIdentifier = EventLocationCellIdentifier;
            break;
        case 8:
            reuseIdentifier = NotesCellIdentifier;
            break;
        default:
            reuseIdentifier = SeparatorCellIdentifier;
            break;
    }

    return reuseIdentifier;
}

SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"8.0") is actually from a set of macro definitions I am using which I found somewhere (very helpful). They are defined as:

#define SYSTEM_VERSION_EQUAL_TO(v)                  ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] == NSOrderedSame)
#define SYSTEM_VERSION_GREATER_THAN(v)              ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] == NSOrderedDescending)
#define SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(v)  ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] != NSOrderedAscending)
#define SYSTEM_VERSION_LESS_THAN(v)                 ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] == NSOrderedAscending)
#define SYSTEM_VERSION_LESS_THAN_OR_EQUAL_TO(v)     ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] != NSOrderedDescending)

Use codecs.open with the encoding parameter.

import codecs
f = codecs.open("test.html", 'r', 'utf-8')

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

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

Alexander Abakumov's answer is the correct one. It solved every binding issue I had updating the underlying data and having the grid update.

Its easy to implement and modify any existing source code you have.

grdDetails.DataSource = new System.Windows.Forms.BindingSource { DataSource = OrderDetails };

It can be handle by using transition timing functions step-end and step-start

For example: https://jsfiddle.net/y72h8Lky/

$(".run").on("click", function() {_x000D_
    $(".popup").addClass("show");_x000D_
});_x000D_
$(".popup").on("click", function() {_x000D_
    $(".popup").removeClass("show");_x000D_
})

.popup {_x000D_
    opacity: 0;_x000D_
    display: block;_x000D_
    position: absolute;_x000D_
    top: 100%;_x000D_
    bottom: 0;_x000D_
    left: 0;_x000D_
    right: 0;_x000D_
    z-index: 1450;_x000D_
    background-color: rgba(0, 175, 236, 0.6);_x000D_
    transition: opacity 0.3s ease-out, top 0.3s step-end;_x000D_
}_x000D_
.popup.show {_x000D_
    transition: opacity 0.3s ease-out, top 0.3s step-start;_x000D_
    opacity: 1;_x000D_
    top: 0;_x000D_
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>_x000D_
<div class="popup"></div>_x000D_
<button class="run" style="font-size: 24px;">Click on me</button>

@CarlosLanderas is correct depending on where you've placed the DIV control. The DIV by the way is not technically an ASP control, which is why you cannot find it directly like other controls. But the best way around this is to turn it into an ASP control.

Use asp:Panel instead. It is rendered into a <div> tag anyway...

<asp:Panel id="divSubmitted" runat="server" style="text-align:center" visible="false">
   <asp:Label ID="labSubmitted" runat="server" Text="Roll Call Submitted"></asp:Label>
</asp:Panel>

And in code behind, simply find the Panel control as per normal...

Panel DivCtl1 = (Panel)gvRollCall.FooterRow.FindControl("divSubmitted");
if (DivCtl1 != null)
    DivCtl1.Visible = true;

Please note that I've used FooterRow, as my "psuedo div" is inside the footer row of a Gridview control.

Good coding!

just use abs for converting unsigned to signed in python

 a=-12
b=abs(a)
print(b)

Output: 12

There are all kinds of wonderful ways to specify commits - see the specifying revisions section of man git-rev-parse for more details. In this case, you probably want:

git diff HEAD@{1}

The @{1} means "the previous position of the ref I've specified", so that evaluates to what you had checked out previously - just before the pull. You can tack HEAD on the end there if you also have some changes in your work tree and you don't want to see the diffs for them.

I'm not sure what you're asking for with "the commit ID of my latest version of the file" - the commit "ID" (SHA1 hash) is that 40-character hex right at the top of every entry in the output of git log. It's the hash for the entire commit, not for a given file. You don't really ever need more - if you want to diff just one file across the pull, do

git diff HEAD@{1} filename

This is a general thing - if you want to know about the state of a file in a given commit, you specify the commit and the file, not an ID/hash specific to the file.

if you are coding in jupyter notebook, and want to check which cuda version tf is using, run the follow command directly into jupyter cell:

!conda list cudatoolkit

!conda list cudnn

and to check if the gpu is visible to tf:

tf.test.is_gpu_available(
    cuda_only=False, min_cuda_compute_capability=None
)

I think the answers here are great, but I would like to add a scenario.

Several times I've wanted to take a certain amount of characters off the front of a string, without worrying about it's length. There are several ways of doing this with RIGHT() and SUBSTRING(), but they all need to know the length of the string which can sometimes slow things down.

I've use the STUFF() function instead:

SET @Result = STUFF(@Result, 1, @LengthToRemove, '')

This replaces the length of unneeded string with an empty string.

It's there because all controls in ASP .NET inherit from System.Web.UI.Control which has the "runat" attribute.

in the class System.Web.UI.HTMLControl, the attribute is not required, however, in the class System.Web.UI.WebControl the attribute is required.

edit: let me be more specific. since asp.net is pretty much an abstract of HTML, the compiler needs some sort of directive so that it knows that specific tag needs to run server-side. if that attribute wasn't there then is wouldn't know to process it on the server first. if it isn't there it assumes it is regular markup and passes it to the client.

public void saveUrl(final String filename, final String urlString)
        throws MalformedURLException, IOException {
    BufferedInputStream in = null;
    FileOutputStream fout = null;
    try {
        in = new BufferedInputStream(new URL(urlString).openStream());
        fout = new FileOutputStream(filename);

        final byte data[] = new byte[1024];
        int count;
        while ((count = in.read(data, 0, 1024)) != -1) {
            fout.write(data, 0, count);
        }
    } finally {
        if (in != null) {
            in.close();
        }
        if (fout != null) {
            fout.close();
        }
    }
}

You'll need to handle exceptions, probably external to this method.

try {
    File img = new File("somefile.png");
    BufferedImage image = ImageIO.read(img ); 
    System.out.println(image);
} catch (IOException e) { 
    e.printStackTrace(); 
}

Example output for my image file:

BufferedImage@5d391d: type = 5 ColorModel: #pixelBits = 24 
numComponents = 3 color 
space = java.awt.color.ICC_ColorSpace@50a649 
transparency = 1 
has alpha = false 
isAlphaPre = false 
ByteInterleavedRaster: 
width = 800 
height = 600 
#numDataElements 3 
dataOff[0] = 2

You can run System.out.println(object); on just about any object and get some information about it.

Try quoting the argument list:

Start-Process -FilePath "C:\Program Files\MSBuild\test.exe" -ArgumentList "/genmsi/f $MySourceDirectory\src\Deployment\Installations.xml"

You can also provide the argument list as an array (comma separated args) but using a string is usually easier.

Generally this problem occurs when you are modifying the keys very oftenly. Based on the server it might take some time to update the new key that you have generated and pasted in the server. So after generating the key and pasting in the server, wait for 3 to 4 hours and then try. The problem should be solved. It happened with me.

So, I tested above themes and found out none of them are showing proper color combination when using Productivity Power Tools in Visual Studio.
Ultimately, being a fan of dark themes, I created one myself which is fully supported from VS2005 to VS2013.
Here's the screenshot

Download this dark theme from here: Obsidian Meets Visual Studio

To use this theme go to Tools -> Import and Export Setting... -> import selected environment settings -> (optional to save current settings) -> Browse select and then Finish.

Have you tried Hammerjs? It supports swipe gestures by using the velocity of the touch. http://eightmedia.github.com/hammer.js/

I know this is and old question, but i was faced with the same problem recently and none of the answers worked for me:

• Couldn't find an old Foxit Reader version
• As @pilkch said 2Printer adds a report page
• Adobe Reader opens a gui

After searching a little more i found this: http://www.columbia.edu/~em36/pdftoprinter.html.

It's a simple exe that you call with the filename and it prints to the default printer (or one that you specify). From the site:

PDFtoPrinter is a program for printing PDF files from the Windows command line. The program is designed generally for the Windows command line and also for use with the vDos DOS emulator.

To print a PDF file to the default Windows printer, use this command:

PDFtoPrinter.exe filename.pdf

To print to a specific printer, add the name of the printer in quotation marks:

PDFtoPrinter.exe filename.pdf "Name of Printer"

If you want to print to a network printer, use the name that appears in Windows print dialogs, like this (and be careful to note the two backslashes at the start of the name and the single backslash after the servername):

PDFtoPrinter.exe filename.pdf "\\SERVER\PrinterName"

You don't want to use .toString().

Notice that SecretKey inherits from java.security.Key, which itself inherits from Serializable. So the key here (no pun intended) is to serialize the key into a ByteArrayOutputStream, get the byte[] array and store it into the db. The reverse process would be to get the byte[] array off the db, create a ByteArrayInputStream offf the byte[] array, and deserialize the SecretKey off it...

... or even simpler, just use the .getEncoded() method inherited from java.security.Key (which is a parent interface of SecretKey). This method returns the encoded byte[] array off Key/SecretKey, which you can store or retrieve from the database.

This is all assuming your SecretKey implementation supports encoding. Otherwise, getEncoded() will return null.

edit:

You should look at the Key/SecretKey javadocs (available right at the start of a google page):

http://download.oracle.com/javase/6/docs/api/java/security/Key.html

Or this from CodeRanch (also found with the same google search):

http://www.coderanch.com/t/429127/java/java/Convertion-between-SecretKey-String-or

Right from the PHP Docs: PHP 5.3 Windows binaries uses the static version of the MCrypt library, no DLL are needed.

http://php.net/manual/en/mcrypt.requirements.php

But if you really want to download it, just go to the mcrypt sourceforge page

http://sourceforge.net/projects/mcrypt/files/?source=navbar

You need to give the body and the html a height too. Otherwise, the body will only be as high as its contents (the single div), and 50% of that will be half the height of this div.

Updated fiddle: http://jsfiddle.net/j8bsS/5/

As Tushar mentioned, you can keep a dummy div at the bottom of your chat:

render () {
  return (
    <div>
      <div className="MessageContainer" >
        <div className="MessagesList">
          {this.renderMessages()}
        </div>
        <div style={{ float:"left", clear: "both" }}
             ref={(el) => { this.messagesEnd = el; }}>
        </div>
      </div>
    </div>
  );
}

and then scroll to it whenever your component is updated (i.e. state updated as new messages are added):

scrollToBottom = () => {
  this.messagesEnd.scrollIntoView({ behavior: "smooth" });
}

componentDidMount() {
  this.scrollToBottom();
}

componentDidUpdate() {
  this.scrollToBottom();
}

I'm using the standard Element.scrollIntoView method here.

You can use ORDER BY clause to sort data rows by values in columns. Something like

=QUERY(responses!A1:K; "Select C, D, E where B contains '2nd Web Design' Order By C, D")

If you’d like to order by some columns descending, others ascending, you can add desc/asc, ie:

=QUERY(responses!A1:K; "Select C, D, E where B contains '2nd Web Design' Order By C desc, D")

For anyone using entity framework core ending up here. This is how you do it.

# Powershell / Package manager console
Script-Migration

# Cli 
dotnet ef migrations script

You can use the -From and -To parameter to generate an update script to update a database to a specific version.

Script-Migration -From 20190101011200_Initial-Migration -To 20190101021200_Migration-2

https://docs.microsoft.com/en-us/ef/core/managing-schemas/migrations/#generate-sql-scripts

There are several options to this command.

The from migration should be the last migration applied to the database before running the script. If no migrations have been applied, specify 0 (this is the default).

The to migration is the last migration that will be applied to the database after running the script. This defaults to the last migration in your project.

An idempotent script can optionally be generated. This script only applies migrations if they haven't already been applied to the database. This is useful if you don't exactly know what the last migration applied to the database was or if you are deploying to multiple databases that may each be at a different migration.

Here is the Fluent API syntax.

http://blogs.msdn.com/b/adonet/archive/2010/12/06/ef-feature-ctp5-fluent-api-samples.aspx

class Person
{
    public string FirstName { get; set; }
    public string LastName { get; set; }
    public string FullName { 
        get {
            return this.FirstName + " " + this.LastName;
        }
    }
}

class PersonViewModel : Person
{
    public bool UpdateProfile { get; set; }
}


protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
    // ignore a type that is not mapped to a database table
    modelBuilder.Ignore<PersonViewModel>();

    // ignore a property that is not mapped to a database column
    modelBuilder.Entity<Person>()
        .Ignore(p => p.FullName);

}

I was having the same problem on a Ubuntu ec2 instance. I was following this amazon article on page 7:

http://d36cz9buwru1tt.cloudfront.net/AWS_NoSQL_MongoDB.pdf

Mongodb path in /etc/mongodb.conf was set to /var/lib/mongodb (primary install location and working). When I changed to /data/db (EBS volume) I was getting 'errno:13 Permission denied'.

1. First I ran sudo service mongodb stop.
2. Then I used ls -la to see what group & owner mongodb assigned to /var/lib/mongodb (existing path) and I changed the /data/db (new path) with chown and chgrp to match. (example: sudo chown -R mongodb:mongodb /data/db)
3. Then I updated the path in etc/mongodb.conf to /data/db and deleted the old mongo files in /var/lib/mongodb directory.
4. Then I ran sudo service mongodb start and waited about a minute. If you try to connect to 27017 immediately you won't be able to.
5. After a minute check /data/db (EBS volume) and mongo should have placed a journal, mongod.lock, local.ns, local.0, etc. If not try sudo service mongodb restart and check a minute later.

I just spent over a hour with this. Changing the group and deleting the old files is probably not necessary, but that's what worked for me.

This is a great video about mounting a ebs volume to ec2 instance:

http://www.youtube.com/watch?v=gBII3o3BofU

you should be able to use

• "c:\Program Files" (note the quotes)
• c:\PROGRA~1 (the short name notation)

Try c:\> dir /x (in dos shell)

This displays the short names generated for non-8dot3 file names. The format is that of /N with the short name inserted before the long name. If no short name is present, blanks are displayed in its place.

Rule of thumb: Use -a and -o inside square brackets, && and || outside.

It's important to understand the difference between shell syntax and the syntax of the [ command.

• && and || are shell operators. They are used to combine the results of two commands. Because they are shell syntax, they have special syntactical significance and cannot be used as arguments to commands.

• [ is not special syntax. It's actually a command with the name [, also known as test. Since [ is just a regular command, it uses -a and -o for its and and or operators. It can't use && and || because those are shell syntax that commands don't get to see.

But wait! Bash has a fancier test syntax in the form of [[ ]]. If you use double square brackets, you get access to things like regexes and wildcards. You can also use shell operators like &&, ||, <, and > freely inside the brackets because, unlike [, the double bracketed form is special shell syntax. Bash parses [[ itself so you can write things like [[ $foo == 5 && $bar == 6 ]].

Lets try to answer this question, with a good and simple scenario, with 3 MySQL tables i.e. datetable, colortable and jointable.

first see values of table datetable with primary key assigned to column dateid:

mysql> select * from datetable;
+--------+------------+
| dateid | datevalue  |
+--------+------------+
|    101 | 2015-01-01 |
|    102 | 2015-05-01 |
|    103 | 2016-01-01 |
+--------+------------+
3 rows in set (0.00 sec)

now move to our second table values colortable with primary key assigned to column colorid:

mysql> select * from colortable;
+---------+------------+
| colorid | colorvalue |
+---------+------------+
|      11 | blue       |
|      12 | yellow     |
+---------+------------+
2 rows in set (0.00 sec)

and our final third table jointable have no primary keys and values are:

mysql> select * from jointable;
+--------+---------+
| dateid | colorid |
+--------+---------+
|    101 |      11 |
|    102 |      12 |
|    101 |      12 |
+--------+---------+
3 rows in set (0.00 sec)

Now our condition is to find the dateid's, which have both color values blue and yellow.

So, our query is:

mysql> SELECT t1.dateid FROM jointable AS t1 INNER JOIN jointable t2
    -> ON t1.dateid = t2.dateid
    -> WHERE
    -> (t1.colorid IN (SELECT colorid FROM colortable WHERE colorvalue = 'blue'))
    -> AND
    -> (t2.colorid IN (SELECT colorid FROM colortable WHERE colorvalue = 'yellow'));
+--------+
| dateid |
+--------+
|    101 |
+--------+
1 row in set (0.00 sec)

Hope, this would help many one.

Very similar to previous responses, but the is from the current directory, looks at any file and only for ones that are 4 days old. This is what I needed for my research and the above answers were all very helpful. Thanks.

Get-ChildItem -Path . -Recurse| ? {$_.LastWriteTime -gt (Get-Date).AddDays(-4)}

I am adding this answer since programmers coming to VBA from more modern languages and searching Stack Overflow for multithreading in VBA might be unaware of a couple of native VBA approaches which sometimes help to compensate for VBA's lack of true multithreading.

If the motivation of multithreading is to have a more responsive UI that doesn't hang when long-running code is executing, VBA does have a couple of low-tech solutions that often work in practice:

1) Userforms can be made to display modelessly - which allows the user to interact with Excel while the form is open. This can be specified at runtime by setting the Userform's ShowModal property to false or can be done dynamically as the from loads by putting the line

UserForm1.Show vbModeless

in the user form's initialize event.

2) The DoEvents statement. This causes VBA to cede control to the OS to execute any events in the events queue - including events generated by Excel. A typical use-case is updating a chart while code is executing. Without DoEvents the chart won't be repainted until after the macro is run, but with Doevents you can create animated charts. A variation of this idea is the common trick of creating a progress meter. In a loop which is to execute 10,000,000 times (and controlled by the loop index i ) you can have a section of code like:

If i Mod 10000 = 0 Then
    UpdateProgressBar(i) 'code to update progress bar display
    DoEvents
End If

None of this is multithreading -- but it might be an adequate kludge in some cases.

You can't. A redirect requires a webserver to accept the first request and send back the redirect. The "hosts" file just lets you set your own DNS records.

Have you considered using Javascript for this?

$('input').val($('input').val().replace(',', '.'));

Note that sort() operates on the array in place, so you only need to call

sort($a);
doSomething($a);

This will not work;

$a = sort($a);
doSomething($a);

Chrome and Opera browsers do not support thead {display: table-header-group;} but rest of others support properly..

I think use this is better:

os.path.realpath(__file__).rsplit('/', X)[0]


In [1]: __file__ = "/aParent/templates/blog1/page.html"

In [2]: os.path.realpath(__file__).rsplit('/', 3)[0]
Out[3]: '/aParent'

In [4]: __file__ = "/aParent/templates/blog1/page.html"

In [5]: os.path.realpath(__file__).rsplit('/', 1)[0]
Out[6]: '/aParent/templates/blog1'

In [7]: os.path.realpath(__file__).rsplit('/', 2)[0]
Out[8]: '/aParent/templates'

In [9]: os.path.realpath(__file__).rsplit('/', 3)[0]
Out[10]: '/aParent'

Future googlers, on MySQL, try this:

select date_sub(ref_date, interval day(ref_date)-1 day) as day1;

If you do this a lot, NumPy is the way to go.

If for some reason you can't use NumPy:

>>> map(lambda x:sum(x)/float(len(x)), zip(*a))
[45.0, 10.5]

Maybe it's is completely possible with only CSS but I prefer to avoid "float" as much as I can because it interferes with it's parent's height.

If you are using jQuery, you can create a simple `wrapN` plugin that is similar to `wrapAll` except it only wraps "N" elements and then breaks and wraps the next "N" elements using a loop. Then set your wrappers class to `display: block;`.

(function ($) {
    $.fn.wrapN = function (wrapper, n, start) {
        if (wrapper === undefined || n === undefined) return false;
        if (start === undefined) start = 0;
        for (var i = start; i < $(this).size(); i += n)
           $(this).slice(i, i + n).wrapAll(wrapper);
        return this;
    };
}(jQuery));

$(document).ready(function () {
    $("li").wrapN("<span class='break' />", 3);
});

Here is a JSFiddle of the finished product:

http://jsfiddle.net/dustinpoissant/L79ahLoz/

The simplest way is to edit .git/config

Here is an example file

[core]
        repositoryformatversion = 0
        filemode = true
        bare = false
        logallrefupdates = true
        ignorecase = true
[remote "origin"]
        url = [email protected]:repo-name
        fetch = +refs/heads/*:refs/remotes/origin/*
[branch "test1"]
        remote = origin
        merge = refs/heads/test1
[branch "master"]
        remote = origin
        merge = refs/heads/master

Delete the line merge = refs/heads/test1 in the test1 branch section

The next syntax can be used as well.

background: <background-color> 
            url('../assets/icons/my-icon.svg')
            <background-position-x background-position-y>
            <background-repeat>;

It allows you combining background-color, background-image, background-position and background-repeat properties.

Example

background: #696969 url('../assets/icons/my-icon.svg') center center no-repeat;

Your Fragment can subclass ListFragment.
And onCreateView() from ListFragment will return a ListView you can then populate.

I solve this problem by mixing the solutions above.

sink("/Users/my/myTest.dat")
writeLines(unlist(lapply(k, paste, collapse=" ")))
sink()

I think it works well

Don't bother with open/readdir and use glob instead:

foreach(glob($log_directory.'/*.*') as $file) {
    ...
}

Mutable means that it can change/mutate. Immutable the opposite.

Some Python data types are mutable, others not.

Let's find what are the types that fit in each category and see some examples.

Mutable

In Python there are various mutable types:

• lists

• dict

• set

Let's see the following example for lists.

list = [1, 2, 3, 4, 5]

If I do the following to change the first element

list[0] = '!'
#['!', '2', '3', '4', '5']

It works just fine, as lists are mutable.

If we consider that list, that was changed, and assign a variable to it

y = list

And if we change an element from the list such as

list[0] = 'Hello'
#['Hello', '2', '3', '4', '5']

And if one prints y it will give

['Hello', '2', '3', '4', '5']

As both list and y are referring to the same list, and we have changed the list.

Immutable

In some programming languages one can define a constant such as the following

const a = 10

And if one calls, it would give an error

a = 20

However, that doesn't exist in Python.

In Python, however, there are various immutable types:

• None

• bool

• int

• float

• str

• tuple

Let's see the following example for strings.

Taking the string a

a = 'abcd'

We can get the first element with

a[0]
#'a'

If one tries to assign a new value to the element in the first position

a[0] = '!'

It will give an error

'str' object does not support item assignment

When one says += to a string, such as

a += 'e'
#'abcde'

It doesn't give an error, because it is pointing a to a different string.

It would be the same as the following

a = a + 'f'

And not changing the string.

Some Pros and Cons of being immutable

• The space in memory is known from the start. It would not require extra space.

• Usually, it makes things more efficiently. Finding, for example, the len() of a string is much faster, as it is part of the string object.

You should use :first-child instead of :first:

Sounds like you're wanting to iterate through them. You can do this using .each().

Example:

$('td:first-child').each(function() {
    console.log($(this).text());
});

Result:

nonono
nonono2
nonono3

Alernatively if you're not wanting to iterate:

$('td:first-child').css('background', '#000');

JSFiddle demo.

Confusing messages

These messages are rather misleading and understandably a source of confusion. Older Ubuntu versions used Libav which is a fork of the FFmpeg project. FFmpeg returned in Ubuntu 15.04 "Vivid Vervet".

The fork was basically a non-amicable result of conflicting personalities and development styles within the FFmpeg community. It is worth noting that the maintainer for Debian/Ubuntu switched from FFmpeg to Libav on his own accord due to being involved with the Libav fork.

The real ffmpeg vs the fake one

For a while both Libav and FFmpeg separately developed their own version of ffmpeg.

Libav then renamed their bizarro ffmpeg to avconv to distance themselves from the FFmpeg project. During the transition period the "not developed anymore" message was displayed to tell users to start using avconv instead of their counterfeit version of ffmpeg. This confused users into thinking that FFmpeg (the project) is dead, which is not true. A bad choice of words, but I can't imagine Libav not expecting such a response by general users.

This message was removed upstream when the fake "ffmpeg" was finally removed from the Libav source, but, depending on your version, it can still show up in Ubuntu because the Libav source Ubuntu uses is from the ffmpeg-to-avconv transition period.

In June 2012, the message was re-worded for the package libav - 4:0.8.3-0ubuntu0.12.04.1. Unfortunately the new "deprecated" message has caused additional user confusion.

Starting with Ubuntu 15.04 "Vivid Vervet", FFmpeg's ffmpeg is back in the repositories again.

libav vs Libav

To further complicate matters, Libav chose a name that was historically used by FFmpeg to refer to its libraries (libavcodec, libavformat, etc). For example the libav-user mailing list, for questions and discussions about using the FFmpeg libraries, is unrelated to the Libav project.

How to tell the difference

If you are using avconv then you are using Libav. If you are using ffmpeg you could be using FFmpeg or Libav. Refer to the first line in the console output to tell the difference: the copyright notice will either mention FFmpeg or Libav.

Secondly, the version numbering schemes differ. Each of the FFmpeg or Libav libraries contains a version.h header which shows a version number. FFmpeg will end in three digits, such as 57.67.100, and Libav will end in one digit such as 57.67.0. You can also view the library version numbers by running ffmpeg or avconv and viewing the console output.

If you want to use the real ffmpeg

Ubuntu 15.04 "Vivid Vervet" or newer

The real ffmpeg is in the repository, so you can install it with:

apt-get install ffmpeg

For older Ubuntu versions

Your options are:

• Download a recent Linux build of ffmpeg,
• follow a step-by-step guide to compile ffmpeg,
• or use Doug McMahon's PPA (for Ubuntu 14.04 LTS "Trusty Tahr")

These methods are non-intrusive, reversible, and will not interfere with the system or any repository packages.

Another possible option is to upgrade to Ubuntu 15.04 "Vivid Vervet" or newer and just use ffmpeg from the repository.

Also see

For an interesting blog article on the situation, as well as a discussion about the main technical differences between the projects, see The FFmpeg/Libav situation.

/**
 * Generates an array with numbers between
 * min and max randomly positioned.
 */
function genArr(min, max, numOfSwaps){
  var size = (max-min) + 1;
  numOfSwaps = numOfSwaps || size;
  var arr = Array.apply(null, Array(size));

  for(var i = 0, j = min; i < size & j <= max; i++, j++) {
    arr[i] = j;
  }

  for(var i = 0; i < numOfSwaps; i++) {
    var idx1 = Math.round(Math.random() * (size - 1));
    var idx2 = Math.round(Math.random() * (size - 1));

    var temp = arr[idx1];
    arr[idx1] = arr[idx2];
    arr[idx2] = temp;
  }

  return arr;
}

/* generating the array and using it to get 3 uniques numbers */
var arr = genArr(1, 10);
for(var i = 0; i < 3; i++) {
  console.log(arr.pop());
}

Considering that you are using OpenCV, the best way to convert between data types is to use normalize function.

img_n = cv2.normalize(src=img, dst=None, alpha=0, beta=255, norm_type=cv2.NORM_MINMAX, dtype=cv2.CV_8U)

However, if you don't want to use OpenCV, you can do this in numpy

def convert(img, target_type_min, target_type_max, target_type):
    imin = img.min()
    imax = img.max()

    a = (target_type_max - target_type_min) / (imax - imin)
    b = target_type_max - a * imax
    new_img = (a * img + b).astype(target_type)
    return new_img

And then use it like this

imgu8 = convert(img16u, 0, 255, np.uint8)

This is based on the answer that I found on crossvalidated board in comments under this solution https://stats.stackexchange.com/a/70808/277040

There are several levels of managing persistent data, depending on your needs:

• Store it on your host
  • Use the flag -v host-path:container-path to persist container directory data to a host directory.
  • Backups/restores happen by running a backup/restore container (such as tutumcloud/dockup) mounted to the same directory.
• Create a data container and mount its volumes to your application container
  • Create a container that exports a data volume, use --volumes-from to mount that data into your application container.
  • Backup/restore the same as the above solution.
• Use a Docker volume plugin that backs an external/third-party service
  • Docker volume plugins allow your datasource to come from anywhere - NFS, AWS (S3, EFS, and EBS)
  • Depending on the plugin/service, you can attach single or multiple containers to a single volume.
  • Depending on the service, backups/restores may be automated for you.
  • While this can be cumbersome to do manually, some orchestration solutions - such as Rancher - have it baked in and simple to use.
  • Convoy is the easiest solution for doing this manually.

String st = "UPDATE supplier SET supplier_id = " + textBox1.Text + ", supplier_name = " + textBox2.Text
            + "WHERE supplier_id = " + textBox1.Text;

        SqlCommand sqlcom = new SqlCommand(st, myConnection);
        try
        {
            sqlcom.ExecuteNonQuery();
            MessageBox.Show("update successful");
        }
        catch (SqlException ex)
        {
            MessageBox.Show(ex.Message);
        }

Simpler, shorter, faster: EXISTS.

IF EXISTS (SELECT 1 FROM people p WHERE p.person_id = my_person_id) THEN
  -- do something
END IF;

The query planner can stop at the first row found - as opposed to count(), which will scan all matching rows regardless. Makes a difference with big tables. Hardly matters with a condition on a unique column - only one row qualifies anyway (and there is an index to look it up quickly).

^{Improved with input from @a_horse_with_no_name in the comments below.}

You could even use an empty SELECT list:

IF EXISTS (SELECT FROM people p WHERE p.person_id = my_person_id) THEN ...

Since the SELECT list is not relevant to the outcome of EXISTS. Only the existence of at least one qualifying row matters.

I had the same problem. I installed Eclipse 3.7 into a new folder, and created a new workspace. I launch Eclipse with a -data argument to reference the new workspace.

When I attempt to connect to the marketplace to get the SVN and Maven plugins, I get the same issues described in OP.

After a few more tries, I cleared the proxy settings for SOCKS protocol, and I was able to connect to the marketplace.

So the solution for me was to configure the manual settings for HTTP and HTTPS proxy, clear the settings for SOCKS, and restart Eclipse.

You want reorder(). Here is an example with dummy data

set.seed(42)
df <- data.frame(Category = sample(LETTERS), Count = rpois(26, 6))

require("ggplot2")

p1 <- ggplot(df, aes(x = Category, y = Count)) +
         geom_bar(stat = "identity")

p2 <- ggplot(df, aes(x = reorder(Category, -Count), y = Count)) +
         geom_bar(stat = "identity")

require("gridExtra")
grid.arrange(arrangeGrob(p1, p2))

Giving:

Use reorder(Category, Count) to have Category ordered from low-high.

Incomplete information: we need to know which line is throwing the NullReferenceException in order to tell precisely where the problem lies.

Obviously, you are using an uninitialized variable (i.e., a variable that has been declared but not initialized) and try to access one of its non-static method/property/whatever.

Solution: - Find the line that is throwing the exception from the exception details - In this line, check that every variable you are using has been correctly initialized (i.e., it is not null)

Good luck.

Only pass name of the image, no need of 0:

img=cv2.imread('sample.jpg')

In your example propertyInfo.GetValue(this, null) should work. Consider altering GetNamesAndTypesAndValues() as follows:

public void GetNamesAndTypesAndValues()
{
  foreach (PropertyInfo propertyInfo in allClassProperties)
  {
    Console.WriteLine("{0} [type = {1}] [value = {2}]",
      propertyInfo.Name,
      propertyInfo.PropertyType,
      propertyInfo.GetValue(this, null));
  }
}

In some case NTLM authentication still won't work if given the correct credential.

There's a mechanism which will void NTLM auth within WebClient, see here for more information: System.Net.WebClient doesn't work with Windows Authentication

If you're trying above answer and it's still not working, follow the above link to add registry to make the domain whitelisted.

Post this here to save other's time ;)

For ClickHouse, the nothing is system.one

SELECT 1 FROM system.one

You cannot use the Directory directive in .htaccess. However if you create a .htaccess file in the /system directory and place the following in it, you will get the same result

#place this in /system/.htaccess as you had before
deny from all

There is a ProcessHelper Class in PublicDomain open source code which might interest you.

use <meta http-equiv="X-Frame-Options" content="allow"> in the one to show in the iframe to allow it.

When I was to get yesterday with just the date in the format Year/Month/Day I use:

$Variable = Get-Date((get-date ).AddDays(-1))  -Format "yyyy-MM-dd"

Redgate's SQL Search is a great tool for doing this, it's a free plugin for SSMS.

It's not clear exactly what you want to do with the index of a substring [update: it is clearer now - thanks] but you may be able to use the function substring-after or substring-before:

substring-before('My name is Fred', 'Fred')

returns 'My name is '.

If you need more detailed control, the substring() function can take two or three arguments: string, starting-index, length. Omit length to get the whole rest of the string.

There is no index-of() function for strings in XPath (only for sequences, in XPath 2.0). You can use string-length(substring-before($string, $substring))+1 if you specifically need the position.

There is also contains($string, $substring). These are all documented here. In XPath 2.0 you can use regular expression matching.

(XSLT mostly uses XPath for selecting nodes and processing values, so this is actually more of an XPath question. I tagged it thus.)

For a search routine you should look to use Find, AutoFilter or variant array approaches. Range loops are nomally too slow, worse again if they use Select

The code below will look for the strText variable in a user selected range, it then adds any matches to a range variable rng2 which you can then further process

Option Explicit

Const strText As String = "%"

Sub ColSearch_DelRows()
    Dim rng1 As Range
    Dim rng2 As Range
    Dim rng3 As Range
    Dim cel1 As Range
    Dim cel2 As Range
    Dim strFirstAddress As String
    Dim lAppCalc As Long


    'Get working range from user
    On Error Resume Next
    Set rng1 = Application.InputBox("Please select range to search for " & strText, "User range selection", Selection.Address(0, 0), , , , , 8)
    On Error GoTo 0
    If rng1 Is Nothing Then Exit Sub

    With Application
        lAppCalc = .Calculation
        .ScreenUpdating = False
        .Calculation = xlCalculationManual
    End With

    Set cel1 = rng1.Find(strText, , xlValues, xlPart, xlByRows, , False)

    'A range variable - rng2 - is used to store the range of cells that contain the string being searched for
    If Not cel1 Is Nothing Then
        Set rng2 = cel1
        strFirstAddress = cel1.Address
        Do
            Set cel1 = rng1.FindNext(cel1)
            Set rng2 = Union(rng2, cel1)
        Loop While strFirstAddress <> cel1.Address
    End If

    If Not rng2 Is Nothing Then
        For Each cel2 In rng2
            Debug.Print cel2.Address & " contained " & strText
        Next
    Else
        MsgBox "No " & strText
    End If

    With Application
        .ScreenUpdating = True
        .Calculation = lAppCalc
    End With

End Sub

I'm working on a similar problem right now. We have a hierarchichal directory structure and use image ids as filenames. For example, an image with id=1234567 is placed in

..../45/67/1234567_<...>.jpg

using last 4 digits to determine where the file goes.

With a few thousand images, you could use a one-level hierarchy. Our sysadmin suggested no more than couple of thousand files in any given directory (ext3) for efficiency / backup / whatever other reasons he had in mind.

len(queue) should give you the result, 3 in this case.

Specifically, len(object) function will call object.__len__ method [reference link]. And the object in this case is deque, which implements __len__ method (you can see it by dir(deque)).

queue= deque([])   #is this length 0 queue?

Yes it will be 0 for empty deque.

This error can be due to many many things.

The key here seems the hint about error reading. I see you are working on a flash drive or something similar? Try to run the install on a local folder owned by your current user.

You could also try with sudo, that might solve a permission problem if that's the case.

Another reason why it cannot read could be because it has not downloaded correctly, or saved correctly. A little problem in your network could have caused that, and the cache clean would remove the files and force a refetch but that does not solve your problem. That means it would be more on the save part, maybe it didn't save because of permissions, maybe it didn't not save correctly because it was lacking disk space...

To expand a bit on Hossein Narimani Rad's answer, you can rename both a table and columns using System.ComponentModel.DataAnnotations.Schema.TableAttribute and System.ComponentModel.DataAnnotations.Schema.ColumnAttribute respectively.

This has a couple benefits:

1. Not only will this create the the name migrations automatically, but
2. it will also deliciously delete any foreign keys and recreate them against the new table and column names, giving the foreign keys and constaints proper names.
3. All this without losing any table data

For example, adding [Table("Staffs")]:

[Table("Staffs")]
public class AccountUser
{
    public long Id { get; set; }

    public long AccountId { get; set; }

    public string ApplicationUserId { get; set; }

    public virtual Account Account { get; set; }

    public virtual ApplicationUser User { get; set; }
}

Will generate the migration:

    protected override void Up(MigrationBuilder migrationBuilder)
    {
        migrationBuilder.DropForeignKey(
            name: "FK_AccountUsers_Accounts_AccountId",
            table: "AccountUsers");

        migrationBuilder.DropForeignKey(
            name: "FK_AccountUsers_AspNetUsers_ApplicationUserId",
            table: "AccountUsers");

        migrationBuilder.DropPrimaryKey(
            name: "PK_AccountUsers",
            table: "AccountUsers");

        migrationBuilder.RenameTable(
            name: "AccountUsers",
            newName: "Staffs");

        migrationBuilder.RenameIndex(
            name: "IX_AccountUsers_ApplicationUserId",
            table: "Staffs",
            newName: "IX_Staffs_ApplicationUserId");

        migrationBuilder.RenameIndex(
            name: "IX_AccountUsers_AccountId",
            table: "Staffs",
            newName: "IX_Staffs_AccountId");

        migrationBuilder.AddPrimaryKey(
            name: "PK_Staffs",
            table: "Staffs",
            column: "Id");

        migrationBuilder.AddForeignKey(
            name: "FK_Staffs_Accounts_AccountId",
            table: "Staffs",
            column: "AccountId",
            principalTable: "Accounts",
            principalColumn: "Id",
            onDelete: ReferentialAction.Cascade);

        migrationBuilder.AddForeignKey(
            name: "FK_Staffs_AspNetUsers_ApplicationUserId",
            table: "Staffs",
            column: "ApplicationUserId",
            principalTable: "AspNetUsers",
            principalColumn: "Id",
            onDelete: ReferentialAction.Restrict);
    }

    protected override void Down(MigrationBuilder migrationBuilder)
    {
        migrationBuilder.DropForeignKey(
            name: "FK_Staffs_Accounts_AccountId",
            table: "Staffs");

        migrationBuilder.DropForeignKey(
            name: "FK_Staffs_AspNetUsers_ApplicationUserId",
            table: "Staffs");

        migrationBuilder.DropPrimaryKey(
            name: "PK_Staffs",
            table: "Staffs");

        migrationBuilder.RenameTable(
            name: "Staffs",
            newName: "AccountUsers");

        migrationBuilder.RenameIndex(
            name: "IX_Staffs_ApplicationUserId",
            table: "AccountUsers",
            newName: "IX_AccountUsers_ApplicationUserId");

        migrationBuilder.RenameIndex(
            name: "IX_Staffs_AccountId",
            table: "AccountUsers",
            newName: "IX_AccountUsers_AccountId");

        migrationBuilder.AddPrimaryKey(
            name: "PK_AccountUsers",
            table: "AccountUsers",
            column: "Id");

        migrationBuilder.AddForeignKey(
            name: "FK_AccountUsers_Accounts_AccountId",
            table: "AccountUsers",
            column: "AccountId",
            principalTable: "Accounts",
            principalColumn: "Id",
            onDelete: ReferentialAction.Cascade);

        migrationBuilder.AddForeignKey(
            name: "FK_AccountUsers_AspNetUsers_ApplicationUserId",
            table: "AccountUsers",
            column: "ApplicationUserId",
            principalTable: "AspNetUsers",
            principalColumn: "Id",
            onDelete: ReferentialAction.Restrict);
    }

I updated my requirements.txt to have psycopg2==2.7.4 --no-binary=psycopg2 So that it build binaries on source

you need to do something like this,

SELECT * FROM buckets WHERE bucketname RLIKE 'Stylus.*2100';

or

SELECT * FROM buckets WHERE bucketname RLIKE '(Stylus)+.*(2100)+';

These are compact methods to encrypt / decrypt strings with PHP using AES256 CBC:

function encryptString($plaintext, $password, $encoding = null) {
    $iv = openssl_random_pseudo_bytes(16);
    $ciphertext = openssl_encrypt($plaintext, "AES-256-CBC", hash('sha256', $password, true), OPENSSL_RAW_DATA, $iv);
    $hmac = hash_hmac('sha256', $ciphertext.$iv, hash('sha256', $password, true), true);
    return $encoding == "hex" ? bin2hex($iv.$hmac.$ciphertext) : ($encoding == "base64" ? base64_encode($iv.$hmac.$ciphertext) : $iv.$hmac.$ciphertext);
}

function decryptString($ciphertext, $password, $encoding = null) {
    $ciphertext = $encoding == "hex" ? hex2bin($ciphertext) : ($encoding == "base64" ? base64_decode($ciphertext) : $ciphertext);
    if (!hash_equals(hash_hmac('sha256', substr($ciphertext, 48).substr($ciphertext, 0, 16), hash('sha256', $password, true), true), substr($ciphertext, 16, 32))) return null;
    return openssl_decrypt(substr($ciphertext, 48), "AES-256-CBC", hash('sha256', $password, true), OPENSSL_RAW_DATA, substr($ciphertext, 0, 16));
}

Usage:

$enc = encryptString("mysecretText", "myPassword");
$dec = decryptString($enc, "myPassword");

Thanks for the info, think I see the problem. This is a bug in hive-go that only shows up when you add a host. The last lines of it are:

app.listen(3001);
console.log("... port %d in %s mode", app.address().port, app.settings.env);

When you add the host on the first line, it is crashing when it calls app.address().port.

The problem is the potentially asynchronous nature of .listen(). Really it should be doing that console.log call inside a callback passed to listen. When you add the host, it tries to do a DNS lookup, which is async. So when that line tries to fetch the address, there isn't one yet because the DNS request is running, so it crashes.

Try this:

app.listen(3001, 'localhost', function() {
  console.log("... port %d in %s mode", app.address().port, app.settings.env);
});

The name of the inputs must be the same to belong to the same group. Then the others will be automatically deselected when one is clicked.

Despite that the other answers are correct and thoroughly explained, I found some difficulties understanding them. Here is the method I used (Taken from here):

First case: To convert a PFX file to a PEM file that contains both the certificate and private key:

openssl pkcs12 -in filename.pfx -out cert.pem -nodes

Second case: To convert a PFX file to separate public and private key PEM files:

Extracts the private key form a PFX to a PEM file:

openssl pkcs12 -in filename.pfx -nocerts -out key.pem

Exports the certificate (includes the public key only):

openssl pkcs12 -in filename.pfx -clcerts -nokeys -out cert.pem

Removes the password (paraphrase) from the extracted private key (optional):

openssl rsa -in key.pem -out server.key

Wrapping Richy's code I created a custom UIScrollView class that automates content resizing completely!

SBScrollView.h

@interface SBScrollView : UIScrollView
@end

SBScrollView.m:

@implementation SBScrollView
- (void) layoutSubviews
{
    CGFloat scrollViewHeight = 0.0f;
    self.showsHorizontalScrollIndicator = NO;
    self.showsVerticalScrollIndicator = NO;
    for (UIView* view in self.subviews)
    {
        if (!view.hidden)
        {
            CGFloat y = view.frame.origin.y;
            CGFloat h = view.frame.size.height;
            if (y + h > scrollViewHeight)
            {
                scrollViewHeight = h + y;
            }
        }
    }
    self.showsHorizontalScrollIndicator = YES;
    self.showsVerticalScrollIndicator = YES;
    [self setContentSize:(CGSizeMake(self.frame.size.width, scrollViewHeight))];
}
@end

How to use:
Simply import the .h file to your view controller and declare a SBScrollView instance instead of the normal UIScrollView one.

In your css add a class:

.fa-clickable {
    cursor:pointer;
    outline:none;
}

Then add the class to the clickable fontawesome icons (also an id so you can differentiate the clicks):

 <i class="fa fa-dribbble fa-4x fa-clickable" id="epd-dribble"></i>
 <i class="fa fa-behance-square fa-4x fa-clickable" id="epd-behance"></i>
 <i class="fa fa-linkedin-square fa-4x fa-clickable" id="epd-linkedin"></i>
 <i class="fa fa-twitter-square fa-4x fa-clickable" id="epd-twitter"></i>
 <i class="fa fa-facebook-square fa-4x fa-clickable" id="epd-facebook"></i>

Then add a handler in your jQuery

$(document).on("click", "i", function(){
    switch (this.id) {
        case "epd-dribble":
            // do stuff
            break;
        // add additional cases
    }
});

Besides, you can use VS for Android development too, because in the end, the IDE is nothing but a fancy text editor with shortcuts to command line tools, so most popular IDE's can be used.

However, if you want to develop fully native without restrictions, you'll have all kinds of issues, such as those related to file system case insensitivity and missing libraries on Windows platform..

If you try to build windows mobile apps on Linux platform, you'll have bigger problems than other way around, but still makes most sense to use Linux with Eclipse for Android OS.

Firstly, you should read this page thoroughly http://codex.wordpress.org/AJAX_in_Plugins

Secondly, ajax_script is not defined so you should change to: url: ajaxurl. I don't see your function1() in the above code but you might already define it in other file.

And finally, learn how to debug ajax call using Firebug, network and console tab will be your friends. On the PHP side, print_r() or var_dump() will be your friends.

Network communication Host -> Guest

Connect to the Guest and find out the ip address:

ifconfig 

example of result (ip address is 10.0.2.15):

eth0      Link encap:Ethernet  HWaddr 08:00:27:AE:36:99
          inet addr:10.0.2.15  Bcast:10.0.2.255  Mask:255.255.255.0

Go to Vbox instance window -> Menu -> Network adapters:

• adapter should be NAT
• click on "port forwarding"
• insert new record (+ icon)
  • for host ip enter 127.0.0.1, and for guest ip address you got from prev. step (in my case it is 10.0.2.15)
  • in your case port is 8000 - put it on both, but you can change host port if you prefer

Go to host system and try it in browser:

http://127.0.0.1:8000

or your network ip address (find out on the host machine by running: ipconfig).

Network communication Guest -> Host

In this case port forwarding is not needed, the communication goes over the LAN back to the host.

On the host machine - find out your netw ip address:

ipconfig

example of result:

IP Address. . . . . . . . . . . . : 192.168.5.1

On the guest machine you can communicate directly with the host, e.g. check it with ping:

# ping 192.168.5.1
PING 192.168.5.1 (192.168.5.1) 56(84) bytes of data.
64 bytes from 192.168.5.1: icmp_seq=1 ttl=128 time=2.30 ms
...

Firewall issues?

@Stranger suggested that in some cases it would be necessary to open used port (8000 or whichever is used) in firewall like this (example for ufw firewall, I haven't tested):

sudo ufw allow 8000 

As Jordan already said you have to post back the javascript variable to your server before the server can handle the value. To do this you can either program a javascript function that submits a form - or you can use ajax / jquery. jQuery.post

Maybe the most easiest approach for you is something like this

function myJavascriptFunction() { 
  var javascriptVariable = "John";
  window.location.href = "myphpfile.php?name=" + javascriptVariable; 
}

On your myphpfile.php you can use $_GET['name'] after your javascript was executed.

Regards

using bootstrap 4 and SCSS check out this link here for full details

https://getbootstrap.com/docs/4.0/getting-started/theming/

in a nutshell...

open up lib/bootstrap/scss/_navbar.scss and find the statements that create these variables

  .navbar-nav {
    .nav-link {
      color: $navbar-light-color;

      @include hover-focus() {
        color: $navbar-light-hover-color;
      }

      &.disabled {
        color: $navbar-light-disabled-color;
      }
    }

so now you need to override

$navbar-light-color
$navbar-light-hover-color
$navbar-light-disabled-color

create a new scss file _localVariables.scss and add the following (with your colors)

$navbar-light-color : #520b71
$navbar-light-hover-color: #F3EFE6;
$navbar-light-disabled-color: #F3EFE6;

@import "../lib/bootstrap/scss/functions";
@import "../lib/bootstrap/scss/variables";
@import "../lib/bootstrap/scss/mixins/_breakpoints";

and on your other scss pages just add

@import "_localVariables";

instead of

@import "../lib/bootstrap/scss/functions";
@import "../lib/bootstrap/scss/variables";
@import "../lib/bootstrap/scss/mixins/_breakpoints";

Necromancing.
Just posting because all solutions so far fall a bit short of completeness.

SELECT 
     sch.name AS trigger_table_schema 
    ,systbl.name AS trigger_table_name 
    ,systrg.name AS trigger_name 
    ,sysm.definition AS trigger_definition 
    ,systrg.is_instead_of_trigger



    -- https://stackoverflow.com/questions/5340638/difference-between-a-for-and-after-triggers
    -- Difference between a FOR and AFTER triggers?
    -- CREATE TRIGGER trgTable on dbo.Table FOR INSERT,UPDATE,DELETE
    -- Is the same as
    -- CREATE TRIGGER trgTable on dbo.Table AFTER INSERT,UPDATE,DELETE
    -- An INSTEAD OF trigger is different, and fires before and instead of the insert 
    -- and can be used on views, in order to insert the appropriate values into the underlying tables.
    -- AFTER specifies that the DML trigger is fired only when all operations 
    -- specified in the triggering SQL statement have executed successfully. 
    -- All referential cascade actions and constraint checks also must succeed before this trigger fires. 
    -- AFTER is the default when FOR is the only keyword specified.
    ,CASE WHEN systrg.is_instead_of_trigger = 1 THEN 0 ELSE 1 END AS is_after_trigger 

    ,systrg.is_not_for_replication 
    ,systrg.is_disabled
    ,systrg.create_date 
    ,systrg.modify_date

    ,CASE WHEN systrg.parent_class = 1 THEN 'TABLE' WHEN systrg.parent_class = 0 THEN 'DATABASE' END trigger_class 


    ,CASE 
        WHEN systrg.[type] = 'TA' then 'Assembly (CLR) trigger'
        WHEN systrg.[type] = 'TR' then 'SQL trigger' 
        ELSE '' 
    END AS trigger_type 

    -- https://dataedo.com/kb/query/sql-server/list-triggers 
    -- ,(CASE WHEN objectproperty(systrg.object_id, 'ExecIsUpdateTrigger') = 1
    --      THEN 'UPDATE ' ELSE '' END 
    -- + CASE WHEN objectproperty(systrg.object_id, 'ExecIsDeleteTrigger') = 1
    --      THEN 'DELETE ' ELSE '' END
    -- + CASE WHEN objectproperty(systrg.object_id, 'ExecIsInsertTrigger') = 1
    --      THEN 'INSERT' ELSE '' END
    -- ) AS trigger_event 

    ,
    ( 
        STUFF 
        ( 
            ( 
                SELECT 
                    ', ' + type_desc AS [text()]
                    -- STRING_AGG(type_desc, ', ') AS foo 
                FROM sys.events AS syse 
                WHERE syse.object_id = systrg.object_id
                FOR XML PATH(''), TYPE 
                -- GROUP BY syse.object_id 
            ).value('.[1]', 'nvarchar(MAX)') 
            , 1, 2, '' 
        ) 
    ) AS trigger_event_groups 

    -- ,CASE WHEN systrg.parent_class = 1 THEN 'TABLE' WHEN systrg.parent_class = 0 THEN 'DATABASE' END trigger_class  

    ,'DROP TRIGGER "' + sch.name + '"."' + systrg.name + '"; ' AS sql 
    -- ,systrg.*
FROM sys.triggers AS systrg 

LEFT JOIN sys.sql_modules AS sysm 
    ON sysm.object_id = systrg.object_id 

-- sys.objects for view triggers 
-- LEFT JOIN sys.objects AS systbl ON systbl.object_id = systrg.object_id 

-- inner join if you only want table-triggers 
LEFT JOIN sys.tables AS systbl ON systbl.object_id = systrg.parent_id 

LEFT JOIN sys.schemas AS sch 
    ON sch.schema_id = systbl.schema_id 

WHERE (1=1) 

-- AND sch.name IS NOT NULL 
-- AND sch.name IS NULL 
-- AND sch.name = 'dbo' 
-- And here, exclude some triggers with a certain naming schema 
/*  
AND 
(
    -- systbl.name IS NULL 
    -- OR 
    NOT 
    (
        systrg.name = 'TRG_' + systbl.name  + '_INSERT_History'
        OR 
        systrg.name = 'TRG_' + systbl.name  + '_UPDATE_History'
        OR 
        systrg.name = 'TRG_' + systbl.name  + '_DELETE_History'
    )
)
*/

ORDER BY 
     sch.name 
    ,systbl.name 
    ,systrg.name 

In the HTML source provided, the element #tfl has an inline style "display:block". Inline style will always override stylesheets styles…

Then, you have some options (while as you said you can't modify the html code nor using javascript):

• force display:none with !important rule (not recommended)

• put the div offscreen with theses rules :

  #tfl {
      position: absolute;
      left: -9999px;
  }
  

i post something into an iframe then read back the contents of the iframe with json parse...so sometimes it's not a json string

Try this:

if(response) {
    try {
        a = JSON.parse(response);
    } catch(e) {
        alert(e); // error in the above string (in this case, yes)!
    }
}

If you don't need to initiate a post back when you press this button, then making the overhead of a server control isn't necesary.

<input id="addButton" type="button" value="Add" />

<script type="text/javascript" language="javascript">
     $(document).ready(function()
     {
         $('#addButton').click(function() 
         { 
             showDialog('#addPerson'); 
         });
     });
</script>

If you still need to be able to do a post back, you can conditionally stop the rest of the button actions with a little different code:

<asp:Button ID="buttonAdd" runat="server" Text="Add" />

<script type="text/javascript" language="javascript">
     $(document).ready(function()
     {
         $('#<%= buttonAdd.ClientID %>').click(function(e) 
         { 
             showDialog('#addPerson');

             if(/*Some Condition Is Not Met*/) 
                return false;
         });
     });
</script>

I have one quick remedy for this. In fact I got this error because I had not set my web page as start page. When I did my web page(html /aspx) as set start page as shown below I got this error corrected.

I don't know whether this solution will help others.

var consolidatedChildren =
    from c in children
    group c by new
    {
        c.School,
        c.Friend,
        c.FavoriteColor,
    } into gcs
    select new ConsolidatedChild()
    {
        School = gcs.Key.School,
        Friend = gcs.Key.Friend,
        FavoriteColor = gcs.Key.FavoriteColor,
        Children = gcs.ToList(),
    };

var consolidatedChildren =
    children
        .GroupBy(c => new
        {
            c.School,
            c.Friend,
            c.FavoriteColor,
        })
        .Select(gcs => new ConsolidatedChild()
        {
            School = gcs.Key.School,
            Friend = gcs.Key.Friend,
            FavoriteColor = gcs.Key.FavoriteColor,
            Children = gcs.ToList(),
        });

In ionic 4.6 I use the following technique and it works. I am adding this answer so that if anybody is facing similar issues in newer ionic version app, it may help them.

i) Open app.module.ts and add the following code block to import HttpModule and HttpClientModule

import { HttpModule } from '@angular/http';
import {   HttpClientModule } from '@angular/common/http';

ii) In @NgModule import sections add below lines:

HttpModule,
HttpClientModule,

So, in my case @NgModule, looks like this:

@NgModule({
  declarations: [AppComponent ],
  entryComponents: [ ],
  imports: [
    BrowserModule,
    HttpModule,
    HttpClientModule,
    IonicModule.forRoot(),
    AppRoutingModule, 
  ],
  providers: [
    StatusBar,
    SplashScreen,
    { provide: RouteReuseStrategy, useClass: IonicRouteStrategy }
  ],
  bootstrap: [AppComponent]
})

That's it!

ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '<

Very simple question that you can solved it easily ,

Please follow my step : change < to ( and >; to );

Just use: (

     );

enter code here

` CREATE TABLE information (
-> id INT(11) NOT NULL AUTO_INCREMENT,
-> name VARCHAR(30) NOT NULL,
-> age INT(10) NOT NULL,
-> salary INT(100) NOT NULL,
-> address VARCHAR(100) NOT NULL,
-> PRIMARY KEY(id)
-> );`

Another solution, should work on any RDBMS:

WHERE EXISTS (SELECT 1
                FROM (SELECT 'bla%' pattern FROM dual UNION ALL
                      SELECT '%foo%'        FROM dual UNION ALL
                      SELECT 'batz%'        FROM dual)
               WHERE something LIKE pattern)

The inner select can be replaced by another source of patterns like a table (or a view) in this way:

WHERE EXISTS (SELECT 1
                FROM table_of_patterns t
               WHERE something LIKE t.pattern)

table_of_patterns should contain at least a column pattern, and can be populated like this:

INSERT INTO table_of_patterns(pattern) VALUES ('bla%');
INSERT INTO table_of_patterns(pattern) VALUES ('%foo%');
INSERT INTO table_of_patterns(pattern) VALUES ('batz%');

setInterval(function()
{ 
    $.ajax({
      type:"post",
      url:"myurl.html",
      datatype:"html",
      success:function(data)
      {
          //do something with response data
      }
    });
}, 10000);//time in milliseconds 

You can use awk with a system call readlink to get the equivalent of an ls output with full symlink paths. For example:

ls | awk '{printf("%s ->", $1); system("readlink -f " $1)}'

Will display e.g.

thin_repair ->/home/user/workspace/boot/usr/bin/pdata_tools
thin_restore ->/home/user/workspace/boot/usr/bin/pdata_tools
thin_rmap ->/home/user/workspace/boot/usr/bin/pdata_tools
thin_trim ->/home/user/workspace/boot/usr/bin/pdata_tools
touch ->/home/user/workspace/boot/usr/bin/busybox
true ->/home/user/workspace/boot/usr/bin/busybox

(I'm not allowed to comment yet.) I would suggest the following improvements to the already great answer of James McNellis:

template <typename Enumeration>
constexpr auto as_integer(Enumeration const value)
    -> typename std::underlying_type<Enumeration>::type
{
    static_assert(std::is_enum<Enumeration>::value, "parameter is not of type enum or enum class");
    return static_cast<typename std::underlying_type<Enumeration>::type>(value);
}

with

• constexpr: allowing me to use an enum member value as compile-time array size
• static_assert+is_enum: to 'ensure' compile-time that the function does sth. with enumerations only, as suggested

By the way I'm asking myself: Why should I ever use enum class when I would like to assign number values to my enum members?! Considering the conversion effort.

Perhaps I would then go back to ordinary enum as I suggested here: How to use enums as flags in C++?

Yet another (better) flavor of it without static_assert, based on a suggestion of @TobySpeight:

template <typename Enumeration>
constexpr std::enable_if_t<std::is_enum<Enumeration>::value,
std::underlying_type_t<Enumeration>> as_number(const Enumeration value)
{
    return static_cast<std::underlying_type_t<Enumeration>>(value);
}

The error is here:

hasLetter("a",words[]);

You are passing the first item of words, instead of the array.

Instead, pass the array to the function:

hasLetter("a",words);

Problem solved!

Here's a breakdown of what the problem was:

I'm guessing in your browser (chrome throws a different error), words[] == words[0], so when you call hasLetter("a",words[]);, you are actually calling hasLetter("a",words[0]);. So, in essence, you are passing the first item of words to your function, not the array as a whole.

Of course, because words is just an empty array, words[0] is undefined. Therefore, your function call is actually:

hasLetter("a", undefined);

which means that, when you try to access d[ascii], you are actually trying to access undefined[0], hence the error.

If try to print the f object, then you will see that there is f.object that can be probed for getting the selected item (applicable for all rails version > 2.3)

logger.warn("f #{f.object.inspect}")

so, use the following script to get the proper selected option:

:selected => f.object.your_field 

There isn't a direct way to do this like you've attempted.

The usual approach is to use "varargs" and check against the number of arguments. Something like:

function f(arg1, arg2, arg3)

  if nargin < 3
    arg3 =   'some default'
  end

end

There are a few fancier things you can do with isempty, etc., and you might want to look at Matlab central for some packages that bundle these sorts of things.

You might have a look at varargin, nargchk, etc. They're useful functions for this sort of thing. varargs allow you to leave a variable number of final arguments, but this doesn't get you around the problem of default values for some/all of them.

It turns out that the solution is to stop all the related services and solve the “Another daemon is already running” issue.

The commands i used to solve the issue are as follows:

sudo /opt/lampp/lampp stop              
sudo /etc/init.d/apache2 stop    
sudo /etc/init.d/mysql stop

Or, you can also type instead:

sudo service apache2 stop
sudo service mysql stop

After that, we again start the lampp services:

sudo /opt/lampp/lampp start

Now, there must be no problems while opening:

http://localhost                  
http://localhost/phpmyadmin

Array.prototype.map() index:

One can access the index Array.prototype.map() via the second argument of the callback function. Here is an example:

const array = [1, 2, 3, 4];_x000D_
_x000D_
_x000D_
const map = array.map((x, index) => {_x000D_
  console.log(index);_x000D_
  return x + index;_x000D_
});_x000D_
_x000D_
console.log(map);

Other arguments of Array.prototype.map():

• The third argument of the callback function exposes the array on which map was called upon
• The second argument of Array.map() is a object which will be the this value for the callback function. Keep in mind that you have to use the regular function keyword in order to declare the callback since an arrow function doesn't have its own binding to the this keyword.

For example:

const array = [1, 2, 3, 4];_x000D_
_x000D_
const thisObj = {prop1: 1}_x000D_
_x000D_
_x000D_
const map = array.map( function (x, index, array) {_x000D_
  console.log(array);_x000D_
  console.log(this)_x000D_
}, thisObj);

To run Android envirorment on low configuration machine.

1. Close the uncessesory web tabs in browser
2. For Antivirus users, exclude the build folder which is auto generated

3. Android studio have 1.2 Gb default heap can decrease to 512 MB Help > Edit custom VM options studio.vmoptions -Xmx512m Layouts performace will be speed up

4. For Gradle one of the core component in Android studio Mkae sure like right now 3.0beta is latest one

Below tips can affect the code quality so please use with cautions:

1. Studio contain Power safe Mode when turned on it will close background operations that lint , code complelitions and so on.

2. You can run manually lintcheck when needed ./gradlew lint

3. Most of are using Android emulators on average it consume 2 GB RAM so if possible use actual Android device these will reduce your resource load on your computer. Alternatively you can reduce the RAM of the emulator and it will automatically reduce the virtual memory consumption on your computer. you can find this in virtual device configuration and advance setting.

4. Gradle offline mode is a feature for bandwidth limited users to disable the downloading of build dependencies. It will reduce the background operation that will help to increase the performance of Android studio.

5. Android studio offers an optimization to compile multiple modules in parallel. On low RAM machines this feature will likely have a negative impact on the performance. You can disable it in the compiler settings dialog.

Eclipse Juno, Indigo and Kepler when using the bundled maven version(m2e), are not suppressing the message SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder". This behaviour is present from the m2e version 1.1.0.20120530-0009 and onwards.

Although, this is indicated as an error your logs will be saved normally. The highlighted error will still be present until there is a fix of this bug. More about this in the m2e support site.

The current available solution is to use an external maven version rather than the bundled version of Eclipse. You can find about this solution and more details regarding this bug in the question below which i believe describes the same problem you are facing.

SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder". error

To checkout the branch via Jenkins scripts use:

stage('Checkout SCM') {
    git branch: 'branchName', credentialsId: 'your_credentials', url: "giturlrepo"
}

Just move the extra condition into the JOIN ON criteria, this way the existence of b is not required to return a result

SELECT a.* FROM a 
    LEFT JOIN b ON a.group_id=b.group_id AND b.user_id!=$_SESSION{['user_id']} 
    WHERE a.keyword LIKE '%".$keyword."%' 
    GROUP BY group_id

go to your angular project folder and open the command promt an type "ng g component header" where header is the new component that you want to create.As default the header component will be created inside the app component.You can create components inside a component .For example if you want to create a component inside he header that we made above then type"ng g component header/menu". This will create a menu component inside the header component

this worked for me:

text-align: center;
text-align-last: center;

Use CopyOnWriteArrayList
and if you want to remove it, do the following:

for (Iterator<String> it = userList.iterator(); it.hasNext() ;)
{
    if (wordsToRemove.contains(word))
    {
        it.remove();
    }
}

>>> a=$("#communitymode")[0]
<input id="communitymode" type="checkbox" name="communitymode">
>>> a.type
"checkbox"

Or, more of the style of jQuery:

$("#myinput").attr('type') == 'checkbox'

If you are not in the default availability zone the results from overthink would return empty.

ec2-describe-tags \
   --region \
     $(curl -s http://169.254.169.254/latest/meta-data/placement/availability-zone  | sed -e "s/.$//") \
   --filter \
     resource-id=$(curl --silent http://169.254.169.254/latest/meta-data/instance-id)

If you want to add a filter to get a specific tag (elasticbeanstalk:environment-name in my case) then you can do this.

ec2-describe-tags \
   --region \
     $(curl -s http://169.254.169.254/latest/meta-data/placement/availability-zone  | sed -e "s/.$//") \
   --filter \
     resource-id=$(curl --silent http://169.254.169.254/latest/meta-data/instance-id) \
   --filter \
     key=elasticbeanstalk:environment-name | cut -f5

And to get only the value for the tag that I filtered on, we pipe to cut and get the fifth field.

ec2-describe-tags \
  --region \
    $(curl -s http://169.254.169.254/latest/meta-data/placement/availability-zone  | sed -e "s/.$//") \
  --filter \
    resource-id=$(curl --silent http://169.254.169.254/latest/meta-data/instance-id) \
  --filter \
    key=elasticbeanstalk:environment-name | cut -f5

If you want a boolean value:

>>> a = [1, 2, 3, 4, 5]
>>> b = [9, 8, 7, 6, 5]
>>> set(b) == set(a)  & set(b) and set(a) == set(a) & set(b)
False
>>> a = [3,1,2]
>>> b = [1,2,3]
>>> set(b) == set(a)  & set(b) and set(a) == set(a) & set(b)
True

%d seems to be the norm for printing integers, I never figured out why, they behave identically.

//for pdf view

let pdfWindow = window.open("");
pdfWindow.document.write("<iframe width='100%' height='100%' src='data:application/pdf;base64," + data.data +"'></iframe>");

Before messing with too much things, please check the user the service is trying to run as. In my case it was NETWORK this one did not have write permissions to some locations where it was needed. Changing the user to Local System Account did the trick.

If the event viewer shows any error like "Can't create test file C:\Program Files\MySQL\MySQL Server 5.6\data\XXX.lower-test", there is a high probability for this solution to work. Good luck!

To deselect all rows and cells in a DataGridView, you can use the ClearSelection method:

myDataGridView.ClearSelection()

If you don't want even the first row/cell to appear selected, you can set the CurrentCell property to Nothing/null, which will temporarily hide the focus rectangle until the control receives focus again:

myDataGridView.CurrentCell = Nothing

To determine when the user has clicked on a blank part of the DataGridView, you're going to have to handle its MouseUp event. In that event, you can HitTest the click location and watch for this to indicate HitTestInfo.Nowhere. For example:

Private Sub myDataGridView_MouseUp(ByVal sender as Object, ByVal e as System.Windows.Forms.MouseEventArgs)
    ''# See if the left mouse button was clicked
    If e.Button = MouseButtons.Left Then
        ''# Check the HitTest information for this click location
        If myDataGridView.HitTest(e.X, e.Y) = DataGridView.HitTestInfo.Nowhere Then
            myDataGridView.ClearSelection()
            myDataGridView.CurrentCell = Nothing
        End If
    End If
End Sub

Of course, you could also subclass the existing DataGridView control to combine all of this functionality into a single custom control. You'll need to override its OnMouseUp method similar to the way shown above. I also like to provide a public DeselectAll method for convenience that both calls the ClearSelection method and sets the CurrentCell property to Nothing.

(Code samples are all arbitrarily in VB.NET because the question doesn't specify a language—apologies if this is not your native dialect.)

This is the simplest solution to solve horisontal scrolling in Safari.

html, body {
  position:relative;
  overflow-x:hidden;
}

Another way to accomplish this is with the jq "--arg" flag. Using the original example:

#!/bin/sh

#this works ***
projectID=$(cat file.json | jq -r '.resource[] | 
select(.username=="[email protected]") | .id')
echo "$projectID"

[email protected]

# Use --arg to pass the variable to jq. This should work:
projectID=$(cat file.json | jq --arg EMAILID $EMAILID -r '.resource[] 
| select(.username=="$EMAILID") | .id')
echo "$projectID"

See here, which is where I found this solution: https://github.com/stedolan/jq/issues/626

When posting form data with an HTML form, be sure the input tags have name attributes, otherwise they won't be present in request.form.

@app.route('/', methods=['GET', 'POST'])
def index():
    print(request.form)
    return """
<form method="post">
    <input type="text">
    <input type="text" id="txt2">
    <input type="text" name="txt3" id="txt3">  
    <input type="submit">
</form>
"""

ImmutableMultiDict([('txt3', 'text 3')])

Only the txt3 input had a name, so it's the only key present in request.form.

The book Java Generics and Collections has this information (pages: 188, 211, 222, 240).

List implementations:

                      get  add  contains next remove(0) iterator.remove
ArrayList             O(1) O(1) O(n)     O(1) O(n)      O(n)
LinkedList            O(n) O(1) O(n)     O(1) O(1)      O(1)
CopyOnWrite-ArrayList O(1) O(n) O(n)     O(1) O(n)      O(n)

Set implementations:

                      add      contains next     notes
HashSet               O(1)     O(1)     O(h/n)   h is the table capacity
LinkedHashSet         O(1)     O(1)     O(1) 
CopyOnWriteArraySet   O(n)     O(n)     O(1) 
EnumSet               O(1)     O(1)     O(1) 
TreeSet               O(log n) O(log n) O(log n)
ConcurrentSkipListSet O(log n) O(log n) O(1)

Map implementations:

                      get      containsKey next     Notes
HashMap               O(1)     O(1)        O(h/n)   h is the table capacity
LinkedHashMap         O(1)     O(1)        O(1) 
IdentityHashMap       O(1)     O(1)        O(h/n)   h is the table capacity 
EnumMap               O(1)     O(1)        O(1) 
TreeMap               O(log n) O(log n)    O(log n) 
ConcurrentHashMap     O(1)     O(1)        O(h/n)   h is the table capacity 
ConcurrentSkipListMap O(log n) O(log n)    O(1)

Queue implementations:

                      offer    peek poll     size
PriorityQueue         O(log n) O(1) O(log n) O(1)
ConcurrentLinkedQueue O(1)     O(1) O(1)     O(n)
ArrayBlockingQueue    O(1)     O(1) O(1)     O(1)
LinkedBlockingQueue   O(1)     O(1) O(1)     O(1)
PriorityBlockingQueue O(log n) O(1) O(log n) O(1)
DelayQueue            O(log n) O(1) O(log n) O(1)
LinkedList            O(1)     O(1) O(1)     O(1)
ArrayDeque            O(1)     O(1) O(1)     O(1)
LinkedBlockingDeque   O(1)     O(1) O(1)     O(1)

The bottom of the javadoc for the java.util package contains some good links:

• Collections Overview has a nice summary table.
• Annotated Outline lists all of the implementations on one page.

If you only want to clear the list box, you should use the Clear (winforms | wpf | asp.net) method:

ListBox2.Items.Clear()

agree to most answers except that in jupyter_notebook_config.py, you have to put

#c.NotebookApp.notebook_dir='c:\\test\\your_root'

double \\ is the key answer

myLabel.setHorizontalAlignment(SwingConstants.CENTER);
myLabel.setVerticalAlignment(SwingConstants.CENTER);

If you cannot reconstruct the label for some reason, this is how you edit these properties of a pre-existent JLabel.

Maybe try this:

<%= link_to "Add to cart", 
            :controller => "car", 
            :action => "add_to_cart", 
            :car => car.attributes %>

But I'd really like to see where the car object is getting setup for this page (i.e., the rest of the view).

Try this:

sed -i -e 's/\"//g' file.txt

You have to first declare delegate's type because delegates are strongly typed:

public void MyCallbackDelegate( string str );

public void DoRequest(string request, MyCallbackDelegate callback)
{
     // do stuff....
     callback("asdf");
}

Firstly, try / except are not functions, but statements.

To convert a string (or any other type that can be converted) to an integer in Python, simply call the int() built-in function. int() will raise a ValueError if it fails and you should catch this specifically:

In Python 2.x:

>>> for value in '12345', 67890, 3.14, 42L, 0b010101, 0xFE, 'Not convertible':
...     try:
...         print '%s as an int is %d' % (str(value), int(value))
...     except ValueError as ex:
...         print '"%s" cannot be converted to an int: %s' % (value, ex)
...
12345 as an int is 12345
67890 as an int is 67890
3.14 as an int is 3
42 as an int is 42
21 as an int is 21
254 as an int is 254
"Not convertible" cannot be converted to an int: invalid literal for int() with base 10: 'Not convertible'

In Python 3.x

the syntax has changed slightly:

>>> for value in '12345', 67890, 3.14, 42, 0b010101, 0xFE, 'Not convertible':
...     try:
...         print('%s as an int is %d' % (str(value), int(value)))
...     except ValueError as ex:
...         print('"%s" cannot be converted to an int: %s' % (value, ex))
...
12345 as an int is 12345
67890 as an int is 67890
3.14 as an int is 3
42 as an int is 42
21 as an int is 21
254 as an int is 254
"Not convertible" cannot be converted to an int: invalid literal for int() with base 10: 'Not convertible'

If any of the answers mentioned here doesn't work then go to File > Invalidate Catches/Restart

1. Go to the log view (to be able to go here go to View -> log view).
2. Double click on the line with the branch label stating that branch. Automatically, it will switch branch. (A prompt will dropdown and say switching branch.)
3. If you have two or more branches on the same line, it will ask you via prompt which branch you want to switch. Choose the specific branch from the dropdown and click ok.

To determine which branch you are now on, look at the side bar, under BRANCHES, you are in the branch that is in BOLD LETTERS.

Put this in the <head> section:

<link rel="icon" href="http://www.domain.com/favicon.ico" type="image/x-icon" />
<link rel="shortcut icon" href="http://www.domain.com/favicon.ico" type="image/x-icon" />

Keep the picture file named "favicon.ico". You'll have to look online to get a .ico file generator.

You might produce the wrong behavior because the File-Api fs.readdir does not return a promise. It only takes a callback. If you want to go with the async-await syntax you could 'promisify' the function like this:

function readdirAsync(path) {
  return new Promise(function (resolve, reject) {
    fs.readdir(path, function (error, result) {
      if (error) {
        reject(error);
      } else {
        resolve(result);
      }
    });
  });
}

and call it instead:

names = await readdirAsync('path/to/dir');

In Qt 4.7, there is the QDateTime::currentMSecsSinceEpoch() static function, which does exactly what you need, without any intermediary steps. Hence I'd recommend that for projects using Qt 4.7 or newer.

Example of single, double, heredoc, and nowdoc quotes

<?php

    $fname = "David";

    // Single quotes
    echo 'My name is $fname.'; // My name is $fname.

    // Double quotes
    echo "My name is $fname."; // My name is David.

    // Curly braces to isolate the name of the variable
    echo "My name is {$fname}."; // My name is David.

    // Example of heredoc
    echo $foo = <<<abc
    My name is {$fname}
    abc;

        // Example of nowdoc
        echo <<< 'abc'
        My name is "$name".
        Now, I am printing some
    abc;

?>

The question is answered already, but I want add more information about the causes.

Android app unable to start activity componentinfo

This error often comes with appropriate logs. You can read logs and can solve this issue easily.

Here is a sample log. In which you can see clearly ClassCastException. So this issue came because TextView cannot be cast to EditText.

Caused by: java.lang.ClassCastException: android.widget.TextView cannot be cast to android.widget.EditText

11-04 01:24:10.403: D/AndroidRuntime(1050): Shutting down VM
11-04 01:24:10.403: W/dalvikvm(1050): threadid=1: thread exiting with uncaught exception (group=0x41465700)
11-04 01:24:10.543: E/AndroidRuntime(1050): FATAL EXCEPTION: main
11-04 01:24:10.543: E/AndroidRuntime(1050): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.troysantry.tipcalculator/com.troysantry.tipcalculator.TipCalc}: java.lang.ClassCastException: android.widget.TextView cannot be cast to android.widget.EditText
11-04 01:24:10.543: E/AndroidRuntime(1050):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2211)
11-04 01:24:10.543: E/AndroidRuntime(1050):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261)
11-04 01:24:10.543: E/AndroidRuntime(1050):     at android.app.ActivityThread.access$600(ActivityThread.java:141)
11-04 01:24:10.543: E/AndroidRuntime(1050):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256)
11-04 01:24:10.543: E/AndroidRuntime(1050):     at android.os.Handler.dispatchMessage(Handler.java:99)
11-04 01:24:10.543: E/AndroidRuntime(1050):     at android.os.Looper.loop(Looper.java:137)
11-04 01:24:10.543: E/AndroidRuntime(1050):     at android.app.ActivityThread.main(ActivityThread.java:5103)
11-04 01:24:10.543: E/AndroidRuntime(1050):     at java.lang.reflect.Method.invokeNative(Native Method)
11-04 01:24:10.543: E/AndroidRuntime(1050):     at java.lang.reflect.Method.invoke(Method.java:525)
11-04 01:24:10.543: E/AndroidRuntime(1050):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
11-04 01:24:10.543: E/AndroidRuntime(1050):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
11-04 01:24:10.543: E/AndroidRuntime(1050):     at dalvik.system.NativeStart.main(Native Method)
11-04 01:24:10.543: E/AndroidRuntime(1050): Caused by: java.lang.ClassCastException: android.widget.TextView cannot be cast to android.widget.EditText
11-04 01:24:10.543: E/AndroidRuntime(1050):     at com.troysantry.tipcalculator.TipCalc.onCreate(TipCalc.java:45)
11-04 01:24:10.543: E/AndroidRuntime(1050):     at android.app.Activity.performCreate(Activity.java:5133)
11-04 01:24:10.543: E/AndroidRuntime(1050):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
11-04 01:24:10.543: E/AndroidRuntime(1050):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2175)
11-04 01:24:10.543: E/AndroidRuntime(1050):     ... 11 more
11-04 01:29:11.177: I/Process(1050): Sending signal. PID: 1050 SIG: 9
11-04 01:31:32.080: D/AndroidRuntime(1109): Shutting down VM
11-04 01:31:32.080: W/dalvikvm(1109): threadid=1: thread exiting with uncaught exception (group=0x41465700)
11-04 01:31:32.194: E/AndroidRuntime(1109): FATAL EXCEPTION: main
11-04 01:31:32.194: E/AndroidRuntime(1109): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.troysantry.tipcalculator/com.troysantry.tipcalculator.TipCalc}: java.lang.ClassCastException: android.widget.TextView cannot be cast to android.widget.EditText
11-04 01:31:32.194: E/AndroidRuntime(1109):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2211)
11-04 01:31:32.194: E/AndroidRuntime(1109):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261)
11-04 01:31:32.194: E/AndroidRuntime(1109):     at android.app.ActivityThread.access$600(ActivityThread.java:141)
11-04 01:31:32.194: E/AndroidRuntime(1109):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256)
11-04 01:31:32.194: E/AndroidRuntime(1109):     at android.os.Handler.dispatchMessage(Handler.java:99)
11-04 01:31:32.194: E/AndroidRuntime(1109):     at android.os.Looper.loop(Looper.java:137)
11-04 01:31:32.194: E/AndroidRuntime(1109):     at android.app.ActivityThread.main(ActivityThread.java:5103)
11-04 01:31:32.194: E/AndroidRuntime(1109):     at java.lang.reflect.Method.invokeNative(Native Method)
11-04 01:31:32.194: E/AndroidRuntime(1109):     at java.lang.reflect.Method.invoke(Method.java:525)
11-04 01:31:32.194: E/AndroidRuntime(1109):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
11-04 01:31:32.194: E/AndroidRuntime(1109):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
11-04 01:31:32.194: E/AndroidRuntime(1109):     at dalvik.system.NativeStart.main(Native Method)
11-04 01:31:32.194: E/AndroidRuntime(1109): Caused by: java.lang.ClassCastException: android.widget.TextView cannot be cast to android.widget.EditText
11-04 01:31:32.194: E/AndroidRuntime(1109):     at com.troysantry.tipcalculator.TipCalc.onCreate(TipCalc.java:44)
11-04 01:31:32.194: E/AndroidRuntime(1109):     at android.app.Activity.performCreate(Activity.java:5133)
11-04 01:31:32.194: E/AndroidRuntime(1109):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
11-04 01:31:32.194: E/AndroidRuntime(1109):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2175)
11-04 01:31:32.194: E/AndroidRuntime(1109):     ... 11 more
11-04 01:36:33.195: I/Process(1109): Sending signal. PID: 1109 SIG: 9
11-04 02:11:09.684: D/AndroidRuntime(1167): Shutting down VM
11-04 02:11:09.684: W/dalvikvm(1167): threadid=1: thread exiting with uncaught exception (group=0x41465700)
11-04 02:11:09.855: E/AndroidRuntime(1167): FATAL EXCEPTION: main
11-04 02:11:09.855: E/AndroidRuntime(1167): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.troysantry.tipcalculator/com.troysantry.tipcalculator.TipCalc}: java.lang.ClassCastException: android.widget.TextView cannot be cast to android.widget.EditText
11-04 02:11:09.855: E/AndroidRuntime(1167):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2211)
11-04 02:11:09.855: E/AndroidRuntime(1167):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261)
11-04 02:11:09.855: E/AndroidRuntime(1167):     at android.app.ActivityThread.access$600(ActivityThread.java:141)
11-04 02:11:09.855: E/AndroidRuntime(1167):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256)
11-04 02:11:09.855: E/AndroidRuntime(1167):     at android.os.Handler.dispatchMessage(Handler.java:99)
11-04 02:11:09.855: E/AndroidRuntime(1167):     at android.os.Looper.loop(Looper.java:137)
11-04 02:11:09.855: E/AndroidRuntime(1167):     at android.app.ActivityThread.main(ActivityThread.java:5103)
11-04 02:11:09.855: E/AndroidRuntime(1167):     at java.lang.reflect.Method.invokeNative(Native Method)
11-04 02:11:09.855: E/AndroidRuntime(1167):     at java.lang.reflect.Method.invoke(Method.java:525)
11-04 02:11:09.855: E/AndroidRuntime(1167):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
11-04 02:11:09.855: E/AndroidRuntime(1167):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
11-04 02:11:09.855: E/AndroidRuntime(1167):     at dalvik.system.NativeStart.main(Native Method)
11-04 02:11:09.855: E/AndroidRuntime(1167): Caused by: java.lang.ClassCastException: android.widget.TextView cannot be cast to android.widget.EditText
11-04 02:11:09.855: E/AndroidRuntime(1167):     at com.troysantry.tipcalculator.TipCalc.onCreate(TipCalc.java:44)
11-04 02:11:09.855: E/AndroidRuntime(1167):     at android.app.Activity.performCreate(Activity.java:5133)
11-04 02:11:09.855: E/AndroidRuntime(1167):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
11-04 02:11:09.855: E/AndroidRuntime(1167):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2175)
11-04 02:11:09.855: E/AndroidRuntime(1167):     ... 11 more

Some Common Mistakes.

1.findViewById() of non existing view

Like when you use findViewById(R.id.button) when button id does not exist in layout XML.

2. Wrong cast.

If you wrong cast some class, then you get this error. Like you cast RelativeLayout to LinearLayout or EditText to TextView.

3. Activity not registered in manifest.xml

If you did not register Activity in manifest.xml then this error comes.

4. findViewById() with declaration at top level

Below code is incorrect. This will create error. Because you should do findViewById() after calling setContentView(). Because an View can be there after it is created.

public class MainActivity extends Activity {

  ImageView mainImage = (ImageView) findViewById(R.id.imageViewMain); //incorrect way

  @Override
  protected void onCreate(Bundle savedInstanceState){
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    mainImage = (ImageView) findViewById(R.id.imageViewMain); //correct way
    //...
  }
}

5. Starting abstract Activity class.

When you try to start an Activity which is abstract, you will will get this error. So just remove abstract keyword before activity class name.

6. Using kotlin but kotlin not configured.

If your activity is written in Kotlin and you have not setup kotlin in your app. then you will get error. You can follow simple steps as written in Android Link or Kotlin Link. You can check this answer too.

More information

Read about Downcast and Upcast

Read about findViewById() method of Activity class

Super keyword in Java

How to register activity in manifest

Another useful solution, you can work with this string as array of String

for (String s : "xyz".split("")) {
    System.out.println(s);
}

I faced same issue but now i am happy to resolve this issue.

1. npm i core-js
2. put this line into the first line of your index.js file. import core-js

When running Spring Boot + Freemarker if the page appears:

Whitelabel Error Page This application has no explicit mapping for / error, so you are seeing this as a fallback.

In spring-boot-starter-parent 2.2.1.RELEASE version freemarker does not work:

1. rename Freemarker files from .ftl to .ftlh
2. Add to application.properties: spring.freemarker.expose-request-attributes = true

spring.freemarker.suffix = .ftl

Reason of the error is wrong initialization of the mysqli object. True construction would be like this:

$DBConnect = new mysqli("localhost","root","","Ladle");

Ran into this similar issue while using iframe to logout of sub sites with different domains. The solution I used was to load the iframe first, then update the source after the frame is loaded.

var frame = document.createElement('iframe');_x000D_
frame.style.display = 'none';_x000D_
frame.setAttribute('src', 'about:blank');_x000D_
document.body.appendChild(frame);_x000D_
frame.addEventListener('load', () => {_x000D_
  frame.setAttribute('src', url);_x000D_
});

Based on Vikas answer but with a slight modification: The Uri is received by parameter:

private void showPhoto(Uri photoUri){
    Intent intent = new Intent();
    intent.setAction(Intent.ACTION_VIEW);
    intent.setDataAndType(photoUri, "image/*");
    startActivity(intent);
}

For people trying to grab the component instance inside a *ngIf or *ngSwitchCase, you can follow this trick.

Create an init directive.

import {
    Directive,
    EventEmitter,
    Output,
    OnInit,
    ElementRef
} from '@angular/core';

@Directive({
    selector: '[init]'
})
export class InitDirective implements OnInit {
    constructor(private ref: ElementRef) {}

    @Output() init: EventEmitter<ElementRef> = new EventEmitter<ElementRef>();

    ngOnInit() {
        this.init.emit(this.ref);
    }
}

Export your component with a name such as myComponent

@Component({
    selector: 'wm-my-component',
    templateUrl: 'my-component.component.html',
    styleUrls: ['my-component.component.css'],
    exportAs: 'myComponent'
})
export class MyComponent { ... }

Use this template to get the ElementRef AND MyComponent instance

<div [ngSwitch]="type">
    <wm-my-component
           #myComponent="myComponent"
           *ngSwitchCase="Type.MyType"
           (init)="init($event, myComponent)">
    </wm-my-component>
</div>

Use this code in TypeScript

init(myComponentRef: ElementRef, myComponent: MyComponent) {
}

I Know it is pretty late but it will be helpful for the other user, as we can do Job using three ways... as below
1)1. Atttach your source code using
i.e, Right click on the project then properties --> Java build path--> attach your source in the source tab or you can remove jar file and attach the source in the libraries tab
2. Using eclipse source Analyzer
In the eclipse market you can download the plugin java source analyzer which is used to attach the open source jar file's source code. we can achieve it after installing the plugin, by right click on the open source jar and select the attach source option.
3. Using Jadclipse in eclipse you can do it
last not the least, you can achieve the decompile your code using this plugin. it is similar way you can download the plugin from the eclipse market place and install in your eclipse. in jadclipse view you can see your .class file to decomplile source format note here you cannot see the comment and hidden things

I think in your scenario you can use the option one and option three, I prefer option three only if i want to the source code not for the debug the code. else i ll code the option 1, as i have the source already available with.

Only double quoted strings interpret the escape sequences \r and \n as '0x0D' and '0x0A' respectively, so you want:

"\r\n"

Single quoted strings, on the other hand, only know the escape sequences \\ and \'.

So unless you concatenate the single quoted string with a line break generated elsewhere (e. g., using double quoted string "\r\n" or using chr function chr(0x0D).chr(0x0A)), the only other way to have a line break within a single quoted string is to literally type it with your editor:

$s = 'some text before the line break
some text after';

Make sure to check your editor for its line break settings if you require some specific character sequence (\r\n for example).

Use Set

      ...
      Set<String> list = new HashSet<>();
      while (s.hasNext()){
         list.add(s.next());
      }
      ...

this was someone else's answer in the comments...but it should be a real answer:

$("#SomeValue").removeAttr("data-val-required")

tested on MVC 6 with a field having the [Required] attribute

answer stolen from https://stackoverflow.com/users/73382/rob above

If both columns can contain NULL, but you still want to merge them to a single string, the easiest solution is to use CONCAT_WS():

SELECT FirstName AS First_Name
     , LastName AS Last_Name
     , CONCAT_WS('', ContactPhoneAreaCode1, ContactPhoneNumber1) AS Contact_Phone 
  FROM TABLE1

This way you won't have to check for NULL-ness of each column separately.

Alternatively, if both columns are actually defined as NOT NULL, CONCAT() will be quite enough:

SELECT FirstName AS First_Name
     , LastName AS Last_Name
     , CONCAT(ContactPhoneAreaCode1, ContactPhoneNumber1) AS Contact_Phone 
  FROM TABLE1

As for COALESCE, it's a bit different beast: given the list of arguments, it returns the first that's not NULL.

Delete your source tree that was gunzipped or gzipped and extracted to folder and reextract again. Supply your options again

./configure --with-option=/path/etc ...

Then if all libs are present, your make should succeed.

1. Go to you package.json

2. Change "react-scripts": "3.x.x" to "react-scripts": "^3.4.0" in the dependencies

3. Reinstall react-scripts: npm I react-scripts

4. Start your project: npm start

Once focus of edit text is removed, it would not allow you to type even if you set it to focusable again.

Here is a way around it

if (someCondition)
   editTextField.setFocusable(false);
else
   editTextField.setFocusableInTouchMode(true);

Setting it true in setFocusableInTouchMode() seems to do the trick.

For utl_file.open(location,filename,mode) , we need to give directory name for location but not path. For Example:DATA_FILE_DIR , this is the directory name and check out the directory path for that particular directory name.

As seanizer said above, Apache StringUtils is fantastic for this, if you were to include guava you should do the following;

public List<Employee> findEmployees(String str, int dep) {
 Preconditions.checkState(StringUtils.isNotBlank(str), "Invalid input, input is blank or null");
 /** code here **/
}

May I also recommend that you refer to the columns in your result set by name rather than by index, this will make your code much easier to maintain.

1. In Eclipse, click on Windows > Preferences, and then choose Maven in the left side.
2. Check the box "Download repository index updates on startup".
   • Optionally, check the boxes Download Artifact Sources and Download Artifact JavaDoc.
3. Click OK. The warning won't appear anymore.
4. Restart Eclipse.

If you want to show the name of processes and kill them by the command of the kill, I recommended using this script to kill all python3 running process and set your ram memory free :

ps auxww | grep 'python3' | awk '{print $2}' | xargs kill -9

What exactly do you want to know? ActiveRecord has methods that serialize records into JSON. For instance, open up your rails console and enter ModelName.all.to_json and you will see JSON output. render :json essentially calls to_json and returns the result to the browser with the correct headers. This is useful for AJAX calls in JavaScript where you want to return JavaScript objects to use. Additionally, you can use the callback option to specify the name of the callback you would like to call via JSONP.

For instance, lets say we have a User model that looks like this: {name: 'Max', email:' [email protected]'}

We also have a controller that looks like this:

class UsersController < ApplicationController
    def show
        @user = User.find(params[:id])
        render json: @user
    end
end

Now, if we do an AJAX call using jQuery like this:

$.ajax({
    type: "GET",
    url: "/users/5",
    dataType: "json",
    success: function(data){
        alert(data.name) // Will alert Max
    }        
});

As you can see, we managed to get the User with id 5 from our rails app and use it in our JavaScript code because it was returned as a JSON object. The callback option just calls a JavaScript function of the named passed with the JSON object as the first and only argument.

To give an example of the callback option, take a look at the following:

class UsersController < ApplicationController
    def show
        @user = User.find(params[:id])
        render json: @user, callback: "testFunction"
    end
end

Now we can crate a JSONP request as follows:

function testFunction(data) {
    alert(data.name); // Will alert Max
};

var script = document.createElement("script");
script.src = "/users/5";

document.getElementsByTagName("head")[0].appendChild(script);

The motivation for using such a callback is typically to circumvent the browser protections that limit cross origin resource sharing (CORS). JSONP isn't used that much anymore, however, because other techniques exist for circumventing CORS that are safer and easier.

Laravel is not actually that slow. 500-1000ms is absurd; I got it down to 20ms in debug mode.

The problem was Vagrant/VirtualBox + shared folders. I didn't realize they incurred such a performance hit. I guess because Laravel has so many dependencies (loads ~280 files) and each of those file reads is slow, it adds up really quick.

kreeves pointed me in the right direction, this blog post describes a new feature in Vagrant 1.5 that lets you rsync your files into the VM rather than using a shared folder.

There's no native rsync client on Windows, so you'll have to use cygwin. Install it, and make sure to check off Net/rsync. Add C:\cygwin64\bin to your paths. [Or you can install it on Win10/Bash]

Vagrant introduces the new feature. I'm using Puphet, so my Vagrantfile looks a bit funny. I had to tweak it to look like this:

  data['vm']['synced_folder'].each do |i, folder|
    if folder['source'] != '' && folder['target'] != '' && folder['id'] != ''
      config.vm.synced_folder "#{folder['source']}", "#{folder['target']}", 
        id: "#{folder['id']}", 
        type: "rsync",
        rsync__auto: "true",
        rsync__exclude: ".hg/"
    end
  end

Once you're all set up, try vagrant up. If everything goes smoothly your machine should boot up and it should copy all the files over. You'll need to run vagrant rsync-auto in a terminal to keep the files up to date. You'll pay a little bit in latency, but for 30x faster page loads, it's worth it!

If you're using PhpStorm, it's auto-upload feature works even better than rsync. PhpStorm creates a lot of temporary files which can trip up file watchers, but if you let it handle the uploads itself, it works nicely.

One more option is to use lsyncd. I've had great success using this on Ubuntu host -> FreeBSD guest. I haven't tried it on a Windows host yet.

Starting with IPython 5.0 and matplotlib 2.0 you can avoid the use of IPython’s specific magic and use matplotlib.pyplot.ion()/matplotlib.pyplot.ioff() which have the advantages of working outside of IPython as well.

ipython docs