Here is code I have used for Capturing and Saving Camera Image then display it to imageview. You can use according to your need.
You have to save Camera image to specific location then fetch from that location then convert it to byte-array.
Here is method for opening capturing camera image activity.
private static final int CAMERA_PHOTO = 111;
private Uri imageToUploadUri;
private void captureCameraImage() {
Intent chooserIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
File f = new File(Environment.getExternalStorageDirectory(), "POST_IMAGE.jpg");
chooserIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(f));
imageToUploadUri = Uri.fromFile(f);
startActivityForResult(chooserIntent, CAMERA_PHOTO);
}
then your onActivityResult() method should be like this.
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == CAMERA_PHOTO && resultCode == Activity.RESULT_OK) {
if(imageToUploadUri != null){
Uri selectedImage = imageToUploadUri;
getContentResolver().notifyChange(selectedImage, null);
Bitmap reducedSizeBitmap = getBitmap(imageToUploadUri.getPath());
if(reducedSizeBitmap != null){
ImgPhoto.setImageBitmap(reducedSizeBitmap);
Button uploadImageButton = (Button) findViewById(R.id.uploadUserImageButton);
uploadImageButton.setVisibility(View.VISIBLE);
}else{
Toast.makeText(this,"Error while capturing Image",Toast.LENGTH_LONG).show();
}
}else{
Toast.makeText(this,"Error while capturing Image",Toast.LENGTH_LONG).show();
}
}
}
Here is getBitmap() method used in onActivityResult(). I have done all performance improvement that can be possible while getting camera capture image bitmap.
private Bitmap getBitmap(String path) {
Uri uri = Uri.fromFile(new File(path));
InputStream in = null;
try {
final int IMAGE_MAX_SIZE = 1200000; // 1.2MP
in = getContentResolver().openInputStream(uri);
// Decode image size
BitmapFactory.Options o = new BitmapFactory.Options();
o.inJustDecodeBounds = true;
BitmapFactory.decodeStream(in, null, o);
in.close();
int scale = 1;
while ((o.outWidth * o.outHeight) * (1 / Math.pow(scale, 2)) >
IMAGE_MAX_SIZE) {
scale++;
}
Log.d("", "scale = " + scale + ", orig-width: " + o.outWidth + ", orig-height: " + o.outHeight);
Bitmap b = null;
in = getContentResolver().openInputStream(uri);
if (scale > 1) {
scale--;
// scale to max possible inSampleSize that still yields an image
// larger than target
o = new BitmapFactory.Options();
o.inSampleSize = scale;
b = BitmapFactory.decodeStream(in, null, o);
// resize to desired dimensions
int height = b.getHeight();
int width = b.getWidth();
Log.d("", "1th scale operation dimenions - width: " + width + ", height: " + height);
double y = Math.sqrt(IMAGE_MAX_SIZE
/ (((double) width) / height));
double x = (y / height) * width;
Bitmap scaledBitmap = Bitmap.createScaledBitmap(b, (int) x,
(int) y, true);
b.recycle();
b = scaledBitmap;
System.gc();
} else {
b = BitmapFactory.decodeStream(in);
}
in.close();
Log.d("", "bitmap size - width: " + b.getWidth() + ", height: " +
b.getHeight());
return b;
} catch (IOException e) {
Log.e("", e.getMessage(), e);
return null;
}
}
Hope it helps!
I needed to snapshot a div on the page (for a webapp I wrote) that is protected by JWT's and makes very heavy use of Angular.
I had no luck with any of the above methods.
I ended up taking the outerHTML of the div I needed, cleaning it up a little (*) and then sending it to the server where I run wkhtmltopdf against it.
This is working very well for me.
(*) various input devices in my pages didn't render as checked or have their text values when viewed in the pdf... So I run a little bit of jQuery on the html before I send it up for rendering. ex: for text input items -- I copy their .val()'s into 'value' attributes, which then can be seen by wkhtmlpdf
You can try Marvin Framework. It provides an interface to work with cameras. Moreover, it also provides a set of real-time video processing features, like object tracking and filtering.
Take a look!
Real-time Video Processing Demo:
http://www.youtube.com/watch?v=D5mBt0kRYvk
You can use the source below. Just save a frame using MarvinImageIO.saveImage() every 5 second.
Webcam video demo:
public class SimpleVideoTest extends JFrame implements Runnable{
private MarvinVideoInterface videoAdapter;
private MarvinImage image;
private MarvinImagePanel videoPanel;
public SimpleVideoTest(){
super("Simple Video Test");
videoAdapter = new MarvinJavaCVAdapter();
videoAdapter.connect(0);
videoPanel = new MarvinImagePanel();
add(videoPanel);
new Thread(this).start();
setSize(800,600);
setVisible(true);
}
@Override
public void run() {
while(true){
// Request a video frame and set into the VideoPanel
image = videoAdapter.getFrame();
videoPanel.setImage(image);
}
}
public static void main(String[] args) {
SimpleVideoTest t = new SimpleVideoTest();
t.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
}
For those who just want to take a single picture:
WebcamPicture.java
public class WebcamPicture {
public static void main(String[] args) {
try{
MarvinVideoInterface videoAdapter = new MarvinJavaCVAdapter();
videoAdapter.connect(0);
MarvinImage image = videoAdapter.getFrame();
MarvinImageIO.saveImage(image, "./res/webcam_picture.jpg");
} catch(MarvinVideoInterfaceException e){
e.printStackTrace();
}
}
}
My solution below is in es6 because I made use of const
if you prefer es5 you can replace all const
with var
.
const str = " Hello World! ";_x000D_
// const str = " ";_x000D_
_x000D_
checkForWhiteSpaces(str);_x000D_
_x000D_
function checkForWhiteSpaces(args) {_x000D_
const trimmedString = args.trim().length;_x000D_
console.log(checkStringLength(trimmedString)) _x000D_
return checkStringLength(trimmedString) _x000D_
}_x000D_
_x000D_
// If the browser doesn't support the trim function_x000D_
// you can make use of the regular expression below_x000D_
_x000D_
checkForWhiteSpaces2(str);_x000D_
_x000D_
function checkForWhiteSpaces2(args) {_x000D_
const trimmedString = args.replace(/^\s+|\s+$/gm, '').length;_x000D_
console.log(checkStringLength(trimmedString)) _x000D_
return checkStringLength(trimmedString)_x000D_
}_x000D_
_x000D_
function checkStringLength(args) {_x000D_
return args > 0 ? "not empty" : "empty string";_x000D_
}
_x000D_
If you want to create a "desired" Guid you can do
var tempGuid = Guid.Parse("<guidValue>");
where <guidValue>
would be something like 1A3B944E-3632-467B-A53A-206305310BAE
.
If we are directly use data from csv it will give combine data based on comma separation value as it is .csv file.
user1 = pd.read_csv('dataset/1.csv')
If you want to add column names using pandas, you have to do something like this. But below code will not show separate header for your columns.
col_names=['TIME', 'X', 'Y', 'Z']
user1 = pd.read_csv('dataset/1.csv', names=col_names)
To solve above problem we have to add extra filled which is supported by pandas, It is header=None
user1 = pd.read_csv('dataset/1.csv', names=col_names, header=None)
Change the and
s to or
s.
public static void main(String[] args)
{
int [] [] ar=
{
{12,33,23},
{34,56,75},
{14,76,89},
{45,87,20}
};
I prefer using enhanced loop in Java
Since our ar
is an array of array [2D]. So, when you iterate over it, you will first get an array, and then you can iterate over that array
to get individual elements.
for(int[] num: ar)
{
for(int ele : num)
{
System.out.print(" " +ele);
}
System.out.println(" " );
}
}
You just need to update the AngularCli
npm install --save-dev @angular/cli@latest
This worked for me:
$("#searchField").focus(function()
{
this.value = '';
});
create external table table_name(
Year int,
Month int,
column_name data_type )
row format delimited fields terminated by ','
location '/user/user_name/example_data' TBLPROPERTIES('serialization.null.format'='', 'skip.header.line.count'='1');
Refer this,
boolean check = false;
Button backward_img;
Button backward_img1;
backward_img = (Button) findViewById(R.id.bars_footer_backward);
backward_img1 = (Button) findViewById(R.id.bars_footer_backward1);
backward_img.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
check = true;
backward_img.setBackgroundColor(Color.BLUE);
}
});
if (check == true) {
backward_img1.setBackgroundColor(Color.RED);
backward_img.setBackgroundColor(Color.BLUE);
}
I wouldn't use function from one controller into another. A better approach would be to move the common function to a service and then inject the service in both controllers.
I will use collection.save(the_changed_dict)
this way. I've just tested this, and it still works for me. The following is quoted directly from pymongo doc.
:
save(to_save[, manipulate=True[, safe=False[, **kwargs]]])
Save a document in this collection.
If to_save already has an "_id" then an update() (upsert) operation is performed and any existing document with that "_id" is overwritten. Otherwise an insert() operation is performed. In this case if manipulate is True an "_id" will be added to to_save and this method returns the "_id" of the saved document. If manipulate is False the "_id" will be added by the server but this method will return None.
Wrong gradle file. The right one is build.gradle in your 'app' folder.
I use a personnal blend of the phantomjs waitfor.js
example.
This is my main.js
file:
'use strict';
var wasSuccessful = phantom.injectJs('./lib/waitFor.js');
var page = require('webpage').create();
page.open('http://foo.com', function(status) {
if (status === 'success') {
page.includeJs('https://cdnjs.cloudflare.com/ajax/libs/jquery/3.1.1/jquery.min.js', function() {
waitFor(function() {
return page.evaluate(function() {
if ('complete' === document.readyState) {
return true;
}
return false;
});
}, function() {
var fooText = page.evaluate(function() {
return $('#foo').text();
});
phantom.exit();
});
});
} else {
console.log('error');
phantom.exit(1);
}
});
And the lib/waitFor.js
file (which is just a copy and paste of the waifFor()
function from the phantomjs waitfor.js
example):
function waitFor(testFx, onReady, timeOutMillis) {
var maxtimeOutMillis = timeOutMillis ? timeOutMillis : 3000, //< Default Max Timout is 3s
start = new Date().getTime(),
condition = false,
interval = setInterval(function() {
if ( (new Date().getTime() - start < maxtimeOutMillis) && !condition ) {
// If not time-out yet and condition not yet fulfilled
condition = (typeof(testFx) === "string" ? eval(testFx) : testFx()); //< defensive code
} else {
if(!condition) {
// If condition still not fulfilled (timeout but condition is 'false')
console.log("'waitFor()' timeout");
phantom.exit(1);
} else {
// Condition fulfilled (timeout and/or condition is 'true')
// console.log("'waitFor()' finished in " + (new Date().getTime() - start) + "ms.");
typeof(onReady) === "string" ? eval(onReady) : onReady(); //< Do what it's supposed to do once the condi>
clearInterval(interval); //< Stop this interval
}
}
}, 250); //< repeat check every 250ms
}
This method is not asynchronous but at least am I assured that all the resources were loaded before I try using them.
TextView rowTextView = (TextView)getLayoutInflater().inflate(R.layout.yourTextView, null);
rowTextView.setText(text);
layout.addView(rowTextView);
This is how I'm using this:
private List<Tag> tags = new ArrayList<>();
if(tags.isEmpty()){
Gson gson = new Gson();
Type listType = new TypeToken<List<Tag>>() {
}.getType();
tags = gson.fromJson(tour.getTagsJSONArray(), listType);
}
if (flowLayout != null) {
if(!tags.isEmpty()) {
Log.e(TAG, "setTags: "+ flowLayout.getChildCount() );
flowLayout.removeAllViews();
for (Tag tag : tags) {
FlowLayout.LayoutParams lparams = new FlowLayout.LayoutParams(FlowLayout.LayoutParams.WRAP_CONTENT, FlowLayout.LayoutParams.WRAP_CONTENT);
lparams.setMargins(PixelUtil.dpToPx(this, 0), PixelUtil.dpToPx(this, 5), PixelUtil.dpToPx(this, 10), PixelUtil.dpToPx(this, 5));// llp.setMargins(left, top, right, bottom);
TextView rowTextView = (TextView) getLayoutInflater().inflate(R.layout.tag, null);
rowTextView.setText(tag.getLabel());
rowTextView.setLayoutParams(lparams);
flowLayout.addView(rowTextView);
}
}
Log.e(TAG, "setTags: after "+ flowLayout.getChildCount() );
}
And this is my custom TextView named tag:
<?xml version="1.0" encoding="utf-8"?><TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="10dp"
android:textAllCaps="true"
fontPath="@string/font_light"
android:background="@drawable/tag_shape"
android:paddingLeft="11dp"
android:paddingTop="6dp"
android:paddingRight="11dp"
android:paddingBottom="6dp">
this is my tag_shape:
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<solid android:color="#f2f2f2" />
<corners android:radius="15dp" />
</shape>
efect:
In other place I'm adding textviews with language names from dialog with listview:
For a <input type='text'>
element:
input { font-size: 18px; }
or for a <textarea>
:
textarea { font-size: 18px; }
or for a <select>
:
select { font-size: 18px; }
you get the drift.
It would be more correct to say that stdin
, stdout
, and stderr
are "I/O streams" rather
than files. As you've noticed, these entities do not live in the filesystem. But the
Unix philosophy, as far as I/O is concerned, is "everything is a file". In practice,
that really means that you can use the same library functions and interfaces (printf
,
scanf
, read
, write
, select
, etc.) without worrying about whether the I/O stream
is connected to a keyboard, a disk file, a socket, a pipe, or some other I/O abstraction.
Most programs need to read input, write output, and log errors, so stdin
, stdout
,
and stderr
are predefined for you, as a programming convenience. This is only
a convention, and is not enforced by the operating system.
If you have the DLL added to your project, you can open the csproj file and see the Reference tag.
Example:
<Reference Include="System.Web.Mvc, Version=3.0.0.1, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL" />
Another reason this could be happening is if you are using an iframe that has the sandbox attribute and allow-same-origin
isn't set e.g.:
// page.html
<iframe id="f" src="http://localhost:8000/iframe.html" sandbox="allow-scripts"></iframe>
<script type="text/javascript">
var f = document.getElementById("f").contentWindow;
// will throw exception
f.postMessage("hello world!", 'http://localhost:8000');
</script>
// iframe.html
<script type="text/javascript">
window.addEventListener("message", function(event) {
console.log(event);
}, false);
</script>
I haven't found a solution other than:
f.postMessage("hello world!", '*');
As Quentin and other suggested this cannot totally be done with css(partially done with content attribute of css). Instead you should use javascript/jQuery to achieve this,
JS:
document.getElementsByClassName("mandatory")[0].title = "mandatory";
or using jQuery:
$('.mandatory').attr('title','mandatory');
document.getElementsByClassName('mandatory')[0].setAttribute('title', 'mandatory');_x000D_
_x000D_
$('.jmandatory').attr('title', 'jmandatory');
_x000D_
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>_x000D_
Place the Mouse Over the following elements to see the title,_x000D_
<br/><br/>_x000D_
<b><label class="mandatory">->Javascript Mandatory</label></b>_x000D_
<br/><br/>_x000D_
<b><label class="jmandatory">->jQuery Mandatory</label></b>
_x000D_
ack works well on Windows (if you've got Perl). I find it better than grep for many uses.
pls try this,
$('#select_id option[value="'+value+'"]').attr("disabled", true);
You can escape it by preceding it with a \
(making it \/
), or you could use new RegExp('/')
to avoid escaping the regex.
See example in JSFiddle.
'/'.match(/\//) // matches /
'/'.match(new RegExp('/') // matches /
Peg the pattern to find "\\.dbf"
at the end of the string using the $
character:
list.files(pattern = "\\.dbf$")
If you only want to match "" as an empty string
WHERE DATALENGTH(COLUMN) > 0
If you want to count any string consisting entirely of spaces as empty
WHERE COLUMN <> ''
Both of these will not return NULL
values when used in a WHERE
clause. As NULL
will evaluate as UNKNOWN
for these rather than TRUE
.
CREATE TABLE T
(
C VARCHAR(10)
);
INSERT INTO T
VALUES ('A'),
(''),
(' '),
(NULL);
SELECT *
FROM T
WHERE C <> ''
Returns just the single row A
. I.e. The rows with NULL
or an empty string or a string consisting entirely of spaces are all excluded by this query.
You can do it using the scrollTop method on DOM ready:
$(document).ready(function(){
$(this).scrollTop(0);
});
There is a new possible error for this one related to the latest Android Wear technology. I was trying to get an emulator started for the wear SDK in preparation for next week. The API level only supports it in the latest build of 4.4.2 KitKat.
So if you are using something such as the wearable, it starts the default off still in Eclipse as 2.3.3 Gingerbread. Be sure that your target matches the lowest possible supported target. For the wearables its the latest 19 KitKat.
A full fledged jQuery plugin is available. It supports non-breaking layout and keyboard interactions, check out the demo page: http://powerkiki.github.com/ie_expand_select_width/
disclaimer: I coded that thing, patches welcome
AMD:
CommonJS:
AMD
enforces. <?php
list($year) = explode("-", "2068-06-15");
echo $year;
?>
For Mac User Please Go to As Below:
(First of all you must have installed bitbucket plugin)
Android Studio -> Preference -> Other Settings -> Bitbucket
Now change your password and click on Test for verify it. Will also able to add SSH Key for login.
Also its depend on which plugin you used. Some have direct like
Android Studio -> Preference -> Bitbucket linky
This worked for me, I had 3-4 more PDF to Text extractor and if one doesnot work the other one will ... tesseract in particular this code can be used on Windows 7, 8, Server 2008 . Hope this is helpful to you
do
{
// Sleep or Pause the Thread for 1 sec, if service is running too fast...
Thread.Sleep(millisecondsTimeout: 1000);
Guid tempGuid = ToSeqGuid();
string newFileName = tempGuid.ToString().Split('-')[0];
string outputFileName = appPath + "\\pdf2png\\" + fileNameithoutExtension + "-" + newFileName +
".png";
extractor.SaveCurrentImageToFile(outputFileName, ImageFormat.Png);
// Create text file here using Tesseract
foreach (var file in Directory.GetFiles(appPath + "\\pdf2png"))
{
try
{
var pngFileName = Path.GetFileNameWithoutExtension(file);
string[] myArguments =
{
"/C tesseract ", file,
" " + appPath + "\\png2text\\" + pngFileName
}; // /C for closing process automatically whent completes
string strParam = String.Join(" ", myArguments);
var myCmdProcess = new Process();
var theProcess = new ProcessStartInfo("cmd.exe", strParam)
{
CreateNoWindow = true,
UseShellExecute = false,
RedirectStandardOutput = true,
RedirectStandardError = true,
WindowStyle = ProcessWindowStyle.Minimized
}; // Keep the cmd.exe window minimized
myCmdProcess.StartInfo = theProcess;
myCmdProcess.Exited += myCmdProcess_Exited;
myCmdProcess.Start();
//if (process)
{
/*
MessageBox.Show("cmd.exe process started: " + Environment.NewLine +
"Process Name: " + myCmdProcess.ProcessName +
Environment.NewLine + " Process Id: " + myCmdProcess.Id
+ Environment.NewLine + "process.Handle: " +
myCmdProcess.Handle);
*/
Process.EnterDebugMode();
//ShowWindow(hWnd: process.Handle, nCmdShow: 2);
/*
MessageBox.Show("After EnterDebugMode() cmd.exe process Exited: " +
Environment.NewLine +
"Process Name: " + myCmdProcess.ProcessName +
Environment.NewLine + " Process Id: " + myCmdProcess.Id
+ Environment.NewLine + "process.Handle: " +
myCmdProcess.Handle);
*/
myCmdProcess.WaitForExit(60000);
/*
MessageBox.Show("After WaitForExit() cmd.exe process Exited: " +
Environment.NewLine +
"Process Name: " + myCmdProcess.ProcessName +
Environment.NewLine + " Process Id: " + myCmdProcess.Id
+ Environment.NewLine + "process.Handle: " +
myCmdProcess.Handle);
*/
myCmdProcess.Refresh();
Process.LeaveDebugMode();
//myCmdProcess.Dispose();
/*
MessageBox.Show("After LeaveDebugMode() cmd.exe process Exited: " +
Environment.NewLine);
*/
}
//process.Kill();
// Waits for the process to complete task and exites automatically
Thread.Sleep(millisecondsTimeout: 1000);
// This works fine in Windows 7 Environment, and not in Windows 8
// Try following code block
// Check, if process is not comletey exited
if (!myCmdProcess.HasExited)
{
//process.WaitForExit(2000); // Try to wait for exit 2 more seconds
/*
MessageBox.Show(" Process of cmd.exe was exited by WaitForExit(); Method " +
Environment.NewLine);
*/
try
{
// If not, then Kill the process
myCmdProcess.Kill();
//myCmdProcess.Dispose();
//if (!myCmdProcess.HasExited)
//{
// myCmdProcess.Kill();
//}
MessageBox.Show(" Process of cmd.exe exited ( Killed ) successfully " +
Environment.NewLine);
}
catch (System.ComponentModel.Win32Exception ex)
{
MessageBox.Show(
" Exception: System.ComponentModel.Win32Exception " +
ex.ErrorCode + Environment.NewLine);
}
catch (NotSupportedException notSupporEx)
{
MessageBox.Show(" Exception: NotSupportedException " +
notSupporEx.Message +
Environment.NewLine);
}
catch (InvalidOperationException invalidOperation)
{
MessageBox.Show(
" Exception: InvalidOperationException " +
invalidOperation.Message + Environment.NewLine);
foreach (
var textFile in Directory.GetFiles(appPath + "\\png2text", "*.txt",
SearchOption.AllDirectories))
{
loggingInfo += textFile +
" In Reading Text from generated text file by Tesseract " +
Environment.NewLine;
strBldr.Append(File.ReadAllText(textFile));
}
// Delete text file after reading text here
Directory.GetFiles(appPath + "\\pdf2png").ToList().ForEach(File.Delete);
Directory.GetFiles(appPath + "\\png2text").ToList().ForEach(File.Delete);
}
}
}
catch (Exception exception)
{
MessageBox.Show(
" Cought Exception in Generating image do{...}while{...} function " +
Environment.NewLine + exception.Message + Environment.NewLine);
}
}
// Delete png image here
Directory.GetFiles(appPath + "\\pdf2png").ToList().ForEach(File.Delete);
Thread.Sleep(millisecondsTimeout: 1000);
// Read text from text file here
foreach (var textFile in Directory.GetFiles(appPath + "\\png2text", "*.txt",
SearchOption.AllDirectories))
{
loggingInfo += textFile +
" In Reading Text from generated text file by Tesseract " +
Environment.NewLine;
strBldr.Append(File.ReadAllText(textFile));
}
// Delete text file after reading text here
Directory.GetFiles(appPath + "\\png2text").ToList().ForEach(File.Delete);
} while (extractor.GetNextImage()); // Advance image enumeration...
git apply --reject --whitespace=fix mychanges.patch
worked for me.
The --reject
option will instruct git to not fail if it cannot determine how to apply a patch, but instead to apply indivdual hunks it can apply and create reject files (.rej
) for hunks it cannot apply. Wiggle can "apply [these] rejected patches and perform word-wise diffs".
Additionally, --whitespace=fix
will warn about whitespace errors and try to fix them, rather than refusing to apply an otherwise applicable hunk.
Both options together make the application of a patch more robust against failure, but they require additional attention with respect to the result.
For the whole documentation, see https://git-scm.com/docs/git-apply.
If you place the dollar sign before the letter, you will affect only the column, not the row. If you want to have it affect only a row, place the dollar before the number.
You may want to use =isblank() rather than =""
I'm also confused by your comment "no values throughout spreadsheet - just text" - text is a value.
One more hint - excel has a habit of rewriting rules - I don't know how many rules I've written only to discover that excel has changed the values in the "apply to" or formula entry fields.
If you could post an example, I'll revise the answer. Conditional formatting is very finicky.
I'm not sure it's a standard construct, but I think you should have a look on "negative lookahead" (which writes : "?!", without the quotes). It's far easier than all answers in this thread, including the accepted one.
Example : Regex : "^(?!123)[0-9]*\w" Captures any string beginning by digits followed by letters, UNLESS if "these digits" are 123.
http://msdn.microsoft.com/en-us/library/az24scfc%28v=vs.110%29.aspx#grouping_constructs (microsoft page, but quite comprehensive) for lookahead / lookbehind
PS : it works well for me (.Net). But if I'm wrong on something, please let us know. I find this construct very simple and effective, so I'm surprised of the accepted answer.
<?php
$con = mysql_connect("server.com","user","pswd");
if (!$con) {
die('Could not connect: ' . mysql_error());
}
mysql_select_db("db", $con);
$result = mysql_query("select count(1) FROM table");
$row = mysql_fetch_array($result);
$total = $row[0];
echo "Total rows: " . $total;
mysql_close($con);
?>
To check if variable is null or empty use this:
IF LEN(ISNULL(@var, '')) = 0
-- Is empty or NULL
ELSE
-- Is not empty and is not NULL
Non-empty secondary constructor for data class in Kotlin:
data class ChemicalElement(var name: String,
var symbol: String,
var atomicNumber: Int,
var atomicWeight: Double,
var nobleMetal: Boolean?) {
constructor(): this("Silver",
"Ag",
47,
107.8682,
true)
}
fun main() {
var chemicalElement = ChemicalElement()
println("RESULT: ${chemicalElement.symbol} means ${chemicalElement.name}")
println(chemicalElement)
}
// RESULT: Ag means Silver
// ChemicalElement(name=Silver, symbol=Ag, atomicNumber=47, atomicWeight=107.8682, nobleMetal=true)
Empty secondary constructor for data class in Kotlin:
data class ChemicalElement(var name: String,
var symbol: String,
var atomicNumber: Int,
var atomicWeight: Double,
var nobleMetal: Boolean?) {
constructor(): this("",
"",
-1,
0.0,
null)
}
fun main() {
var chemicalElement = ChemicalElement()
println(chemicalElement)
}
// ChemicalElement(name=, symbol=, atomicNumber=-1, atomicWeight=0.0, nobleMetal=null)
I'll try and explain it as simple as possible. So there is no guarantee of the accuracy of the actual terms.
Session is where to initiate the connectivity to AWS services. E.g. following is default session that uses the default credential profile(e.g. ~/.aws/credentials, or assume your EC2 using IAM instance profile )
sqs = boto3.client('sqs')
s3 = boto3.resource('s3')
Because default session is limit to the profile or instance profile used, sometimes you need to use the custom session to override the default session configuration (e.g. region_name, endpoint_url, etc. ) e.g.
# custom resource session must use boto3.Session to do the override
my_west_session = boto3.Session(region_name = 'us-west-2')
my_east_session = boto3.Session(region_name = 'us-east-1')
backup_s3 = my_west_session.resource('s3')
video_s3 = my_east_session.resource('s3')
# you have two choices of create custom client session.
backup_s3c = my_west_session.client('s3')
video_s3c = boto3.client("s3", region_name = 'us-east-1')
Resource : This is the high-level service class recommended to be used. This allows you to tied particular AWS resources and passes it along, so you just use this abstraction than worry which target services are pointed to. As you notice from the session part, if you have a custom session, you just pass this abstract object than worrying about all custom regions,etc to pass along. Following is a complicated example E.g.
import boto3
my_west_session = boto3.Session(region_name = 'us-west-2')
my_east_session = boto3.Session(region_name = 'us-east-1')
backup_s3 = my_west_session.resource("s3")
video_s3 = my_east_session.resource("s3")
backup_bucket = backup_s3.Bucket('backupbucket')
video_bucket = video_s3.Bucket('videobucket')
# just pass the instantiated bucket object
def list_bucket_contents(bucket):
for object in bucket.objects.all():
print(object.key)
list_bucket_contents(backup_bucket)
list_bucket_contents(video_bucket)
Client is a low level class object. For each client call, you need to explicitly specify the targeting resources, the designated service target name must be pass long. You will lose the abstraction ability.
For example, if you only deal with the default session, this looks similar to boto3.resource.
import boto3
s3 = boto3.client('s3')
def list_bucket_contents(bucket_name):
for object in s3.list_objects_v2(Bucket=bucket_name) :
print(object.key)
list_bucket_contents('Mybucket')
However, if you want to list objects from a bucket in different regions, you need to specify the explicit bucket parameter required for the client.
import boto3
backup_s3 = my_west_session.client('s3',region_name = 'us-west-2')
video_s3 = my_east_session.client('s3',region_name = 'us-east-1')
# you must pass boto3.Session.client and the bucket name
def list_bucket_contents(s3session, bucket_name):
response = s3session.list_objects_v2(Bucket=bucket_name)
if 'Contents' in response:
for obj in response['Contents']:
print(obj['key'])
list_bucket_contents(backup_s3, 'backupbucket')
list_bucket_contents(video_s3 , 'videobucket')
xmltodict (full disclosure: I wrote it) can help you convert your XML to a dict+list+string structure, following this "standard". It is Expat-based, so it's very fast and doesn't need to load the whole XML tree in memory.
Once you have that data structure, you can serialize it to JSON:
import xmltodict, json
o = xmltodict.parse('<e> <a>text</a> <a>text</a> </e>')
json.dumps(o) # '{"e": {"a": ["text", "text"]}}'
You can do it using jQuery. Example:
<script src="https://code.jquery.com/jquery-1.11.2.min.js"></script>
<script>
$.ajax({
url : "next.php",
type: "POST",
data : "name=Denniss",
success: function(data)
{
//data - response from server
$('#response_div').html(data);
}
});
</script>
Or create a function that creates an element including attributes from parameters
function elemCreate(elType){
var element = document.createElement(elType);
if (arguments.length>1){
var props = [].slice.call(arguments,1), key = props.shift();
while (key){
element.setAttribute(key,props.shift());
key = props.shift();
}
}
return element;
}
// usage
var img = elemCreate('img',
'width','100',
'height','100',
'src','http://example.com/something.jpeg');
FYI: height/width='100%'
would not work using attributes. For a height/width of 100% you need the elements style.height/style.width
This is reviving an old question, but in Python 3, you can just use bytes
directly:
>>> bytes([17, 24, 121, 1, 12, 222, 34, 76])
b'\x11\x18y\x01\x0c\xde"L'
In this state:
The thread is reading and processing rows for a SELECT statement, and sending data to the client.
Because operations occurring during this this state tend to perform large amounts of disk access (reads).
That's why it takes more time to complete and so is the longest-running state over the lifetime of a given query.
Here's how you would do it in Kotlin
fun <T> myMethod(item: T) where T : ClassA, T : InterfaceB {
//your code here
}
Alamofire.request(URL).responseJSON { response in let status = response.response?.statusCode print("STATUS \(status)") }
How does Scrum fit into Agile Development?
While the Agile methodology can be applied to product development not only in the software industry but in other industries as well, Scrum is specific to software development.
Scrum is not a methodology. It simply provides structure, discipline and a framework for Agile development. The whole project is made up of a series of Sprints or Sprint Cycles (1 to n) where each Sprint is of the same duration. If ‘time’ is denoted by T, then T1 = T2 = T3 =… Tn. Sprints could be anywhere between 2 to 4 weeks. Sprints shorter than 2 weeks are not ideal and are used less frequently. At the end of each Sprint, a functional / working piece of software is produced that the users can actually test.
Original article is here...
Android comes with Apache's Commons Codec - or you add it as dependency. Then do:
String myHexHash = DigestUtils.shaHex(myFancyInput);
That is the old deprecated method you get with Android 4 by default. The new versions of DigestUtils bring all flavors of shaHex() methods like sha256Hex() and also overload the methods with different argument types.
if you are looking for something speedy, here's a method I've been using that's worked for years:
from array import array
with open( path, 'rb' ) as file:
data = array( 'B', file.read() ) # buffer the file
# evaluate it's data
for byte in data:
v = byte # int value
c = chr(byte)
if you want to iterate chars instead of ints, you can simply use data = file.read()
, which should be a bytes() object in py3.
You can either set with ngModel either with [checked] attribute. ngModel binded property should be set to 'true':
1.
<mat-checkbox class = "example-margin" [(ngModel)] = "myModel">
<label>Printer </label>
</mat-checkbox>
2.
<mat-checkbox [checked]= "myModel" class = "example-margin" >
<label>Printer </label>
</mat-checkbox>
3.
<mat-checkbox [ngModel]="myModel" class="example-margin">
<label>Printer </label>
</mat-checkbox>
Dim strPath As String = System.IO.Path.GetDirectoryName( _
System.Reflection.Assembly.GetExecutingAssembly().CodeBase)
Taken from HOW TO: Determine the Executing Application's Path (MSDN)
For apache2 server:
AddType application/octect-stream .ova
File location will depend on particular version of Apache2 -- ours is in /etc/apache2/mods-available/mime.conf
Reference:
https://askubuntu.com/questions/610645/how-to-configure-apache2-to-download-files-directly
docker image tag #imageId myname/server:latest
This works for me
I've covered this in a pet project.. use what you want.
Note that the ListEx implements the IDataReader interface.
people = new ListExCommand(command)
.Map(p=> new ContactPerson()
{
Age = p.GetInt32(p.GetOrdinal("Age")),
FirstName = p.GetString(p.GetOrdinal("FirstName")),
IdNumber = p.GetInt64(p.GetOrdinal("IdNumber")),
Surname = p.GetString(p.GetOrdinal("Surname")),
Email = "[email protected]"
})
.ToListEx()
.Where("FirstName", "Peter");
Or use object mapping like in the following example.
people = new ListExAutoMap(personList)
.Map(p => new ContactPerson()
{
Age = p.Age,
FirstName = p.FirstName,
IdNumber = p.IdNumber,
Surname = p.Surname,
Email = "[email protected]"
})
.ToListEx()
.Where(contactPerson => contactPerson.FirstName == "Zack");
Have a look at http://caprisoft.codeplex.com
It's called dependency injection via constructor injection: class A
gets the dependency as an argument to its constructor and saves the reference to dependent class as a private variable.
There's an interesting introduction on wikipedia.
For const-correctness I'd write:
using T = int;
class A
{
public:
A(const T &thing) : m_thing(thing) {}
// ...
private:
const T &m_thing;
};
but a problem with this class is that it accepts references to temporary objects:
T t;
A a1{t}; // this is ok, but...
A a2{T()}; // ... this is BAD.
It's better to add (requires C++11 at least):
class A
{
public:
A(const T &thing) : m_thing(thing) {}
A(const T &&) = delete; // prevents rvalue binding
// ...
private:
const T &m_thing;
};
Anyway if you change the constructor:
class A
{
public:
A(const T *thing) : m_thing(*thing) { assert(thing); }
// ...
private:
const T &m_thing;
};
it's pretty much guaranteed that you won't have a pointer to a temporary.
Also, since the constructor takes a pointer, it's clearer to users of A
that they need to pay attention to the lifetime of the object they pass.
Somewhat related topics are:
You just need to write the first query as a subquery (derived table), inside parentheses, pick an alias for it (t
below) and alias the columns as well.
The DISTINCT
can also be safely removed as the internal GROUP BY
makes it redundant:
SELECT DATE(`date`) AS `date` , COUNT(`player_name`) AS `player_count`
FROM (
SELECT MIN(`date`) AS `date`, `player_name`
FROM `player_playtime`
GROUP BY `player_name`
) AS t
GROUP BY DATE( `date`) DESC LIMIT 60 ;
Since the COUNT
is now obvious that is only counting rows of the derived table, you can replace it with COUNT(*)
and further simplify the query:
SELECT t.date , COUNT(*) AS player_count
FROM (
SELECT DATE(MIN(`date`)) AS date
FROM player_playtime
GROUP BY player_name
) AS t
GROUP BY t.date DESC LIMIT 60 ;
Swift 4.1
Create a "Character Set" based on the option you want (urlQueryAllowed). Then remove the additional characters you do not want (+&). Then pass that character set to "addingPercentEncoding".
var address = "American Tourister, Abids Road, Bogulkunta, Hyderabad, Andhra Pradesh, India"
var queryCharSet = NSCharacterSet.urlQueryAllowed
queryCharSet.remove(charactersIn: "+&")
let escapedAddress = address.addingPercentEncoding(withAllowedCharacters: queryCharSet)!
let urlpath = String(format: "http://maps.googleapis.com/maps/api/geocode/json?address=\(escapedAddress)")
You could use sp_executesql
instead of exec
. That allows you to specify an output parameter.
declare @out_var varchar(max);
execute sp_executesql
N'select @out_var = ''hello world''',
N'@out_var varchar(max) OUTPUT',
@out_var = @out_var output;
select @out_var;
This prints "hello world".
I don't think that notation is available because—unlike say PHP or C—everything in Ruby is an object.
Sure you could use $var=0; $var++
in PHP, but that's because it's a variable and not an object. Therefore, $var = new stdClass(); $var++
would probably throw an error.
I'm not a Ruby or RoR programmer, so I'm sure someone can verify the above or rectify it if it's inaccurate.
Store the Thread-objects into some collection (like a List or a Set), then loop through the collection once the threads are started and call join() on the Threads.
I am using Angular v11 and was facing this error while trying to lazy load a component (await import('./my-component.component')
) and even if import
and export
were correctly set.
I finally figured out that the solution was deleting the separate dedicated module's file and move the module content inside the component file itself.
rm -r my-component.module.ts
and add module inside my-component.ts
(same file)
@Component({
selector: 'app-my-component',
templateUrl: './my-component.page.html',
styleUrls: ['./my-component.page.scss'],
})
export class MyComponent {
}
@NgModule({
imports: [CommonModule],
declarations: [MyComponent],
})
export class MyComponentModule {}
you have to iterate gridview Rows
for (int count = 0; count < grd.Rows.Count; count++)
{
if (((CheckBox)grd.Rows[count].FindControl("yourCheckboxID")).Checked)
{
((Label)grd.Rows[count].FindControl("labelID")).Text
}
}
Here is a function I wrote to accomplish this based off of the previous answers.
CREATE FUNCTION dbo.RepetitiveReplace
(
@P_String VARCHAR(MAX),
@P_Pattern VARCHAR(MAX),
@P_ReplaceString VARCHAR(MAX),
@P_ReplaceLength INT = 1
)
RETURNS VARCHAR(MAX)
BEGIN
DECLARE @Index INT;
-- Get starting point of pattern
SET @Index = PATINDEX(@P_Pattern, @P_String);
while @Index > 0
begin
--replace matching charactger at index
SET @P_String = STUFF(@P_String, PATINDEX(@P_Pattern, @P_String), @P_ReplaceLength, @P_ReplaceString);
SET @Index = PATINDEX(@P_Pattern, @P_String);
end
RETURN @P_String;
END;
Originally I had a recursive function here which does not play well with sql server as it has a 32 nesting level limit which would result in an error like the below any time you attempt to make 32+ replacements with the function. Instead of trying to make a server level change to allow more nesting (which could be dangerous like allow never ending loops) switching to a while loop makes a lot more sense.
Maximum stored procedure, function, trigger, or view nesting level exceeded (limit 32).
I use this to avoid negative interval.
var seconds = (date1< date2)? (date2- date1).TotalSeconds: (date1 - date2).TotalSeconds;
You can use urllib2
import urllib2
content = urllib2.urlopen(some_url).read()
print content
Also you can use httplib
import httplib
conn = httplib.HTTPConnection("www.python.org")
conn.request("HEAD","/index.html")
res = conn.getresponse()
print res.status, res.reason
# Result:
200 OK
or the requests library
import requests
r = requests.get('https://api.github.com/user', auth=('user', 'pass'))
r.status_code
# Result:
200
Just to add to the existing answers, I don't see anyone mentioning that python requests is not a native library. If you are ok with adding dependencies, then requests is fine. However, if you are trying to avoid adding dependencies, urllib is a native python library that is already available to you.
CREATE DATABASE hindi_test
CHARACTER SET utf8
COLLATE utf8_unicode_ci;
USE hindi_test;
CREATE TABLE `hindi` (`data` varchar(200) COLLATE utf8_unicode_ci NOT NULL) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
INSERT INTO `hindi` (`data`) VALUES('????????');
Both .container
and .container-fluid
are responsive (i.e. they change the layout based on the screen width), but in different ways (I know, the naming doesn't make it sound that way).
Short Answer:
.container
is jumpy / choppy resizing, and
.container-fluid
is continuous / fine resizing at width: 100%.
From a functionality perspective:
.container-fluid
continuously resizes as you change the width of your window/browser by any amount, leaving no extra empty space on the sides ever, unlike how .container
does. (Hence the naming: "fluid" as opposed to "digital", "discrete", "chunked", or "quantized").
.container
resizes in chunks at several certain widths. In other words, it will be different specific aka "fixed" widths different ranges of screen widths.
Semantics: "fixed width"
You can see how naming confusion can arise. Technically, we can say .container
is "fixed width", but it is fixed only in the sense that it doesn't resize at every granular width. It's actually not "fixed" in the sense that it's always stays at a specific pixel width, since it actually can change size.
From a fundamental perspective:
.container-fluid
has the CSS property width: 100%;
, so it continually readjusts at every screen width granularity.
.container-fluid {
width: 100%;
}
.container
has something like "width = 800px" (or em, rem etc.), a specific pixel width value at different screen widths. This of course is what causes the element width to abruptly jump to a different width when the screen width crosses a screen width threshold. And that threshold is governed by CSS3 media queries, which allow you to apply different styles for different conditions, such as screen width ranges.
@media screen and (max-width: 400px){
.container {
width: 123px;
}
}
@media screen and (min-width: 401px) and (max-width: 800px){
.container {
width: 456px;
}
}
@media screen and (min-width: 801px){
.container {
width: 789px;
}
}
Beyond
You can make any fixed widths element responsive via media queries, not just .container
elements, since media queries is exactly how .container
is implemented by bootstrap in the background (see JKillian's answer for the code).
Old question but i find out how to do it faster. For my example: i have about 10k data in my table so i need some fast search machine.
Here is what i did:
$('input[name="search"]').on('keyup', function() {
var input, filter, tr, td, i;
input = $(this);
filter = input.val().toUpperCase();
tr = $("table tr");
for (i = 0; i < tr.length; i++) {
td = tr[i].getElementsByTagName("td")[0]; // <-- change number if you want other column to search
if (td) {
if (td.innerHTML.toUpperCase().indexOf(filter) > -1) {
tr[i].style.display = "";
} else {
tr[i].style.display = "none";
}
}
}
})
Hope it helps somebody.
If you don't want to show the series names in the legend you can disable them by setting showInLegend:false
.
example:
series: [{
showInLegend: false,
name: "<b><?php echo $title; ?></b>",
data: [<?php echo $yaxis; ?>],
}]
You get other options here.
The current answer is incomplete. Installing libv4l-dev
creates a /usr/include/linux/videodev2.h
but doesn't solve the stated problem of not being able to find linux/videodev.h
. The library does ship header files for compatibility, but fails to put them where applications will look for them.
sudo apt-get install libv4l-dev
cd /usr/include/linux
sudo ln -s ../libv4l1-videodev.h videodev.h
This provides a linux/videodev.h
, and of the right version (1).
Use img.Convert(), supports “L”, “RGB” and “CMYK.” mode
import numpy as np
from PIL import Image
img = Image.open("IMG/center_2018_02_03_00_34_32_784.jpg")
img.convert('L')
print np.array(img)
Output:
[[135 123 134 ..., 30 3 14]
[137 130 137 ..., 9 20 13]
[170 177 183 ..., 14 10 250]
...,
[112 99 91 ..., 90 88 80]
[ 95 103 111 ..., 102 85 103]
[112 96 86 ..., 182 148 114]]
Can't you just use a javascript formatter (http://javascript.about.com/library/blformat.htm) ?
Use this CSS (jsFiddle example):
input:disabled.btn:hover,
input:disabled.btn:active,
input:disabled.btn:focus {
color: green
}
You have to write the most outer element on the left and the most inner element on the right.
.btn:hover input:disabled
would select any disabled input elements contained in an element with a class btn
which is currently hovered by the user.
I would prefer :disabled
over [disabled]
, see this question for a discussion: Should I use CSS :disabled pseudo-class or [disabled] attribute selector or is it a matter of opinion?
By the way, Laravel (PHP) generates the HTML - not the browser.
you can use:
$('body').ready(function(){
$(document).on('change', '#elemID', function(){
// do something
});
});
It works with me.
:goto 21490
will take you to the 21490th byte in the buffer.
for image write this
<input type=file accept="image/*">
For other, You can use the accept attribute on your form to suggest to the browser to restrict certain types. However, you'll want to re-validate in your server-side code to make sure. Never trust what the client sends you
You have to placed this code in application.rb
config.action_dispatch.default_headers = {
'Access-Control-Allow-Origin' => '*',
'Access-Control-Request-Method' => %w{GET POST OPTIONS}.join(",")
}
Take care with some of the examples; $0 may include some leading path as well as the name of the program. Eg save this two line script as ./mytry.sh and the execute it.
#!/bin/bash
echo "parameter 0 --> $0" ; exit 0
Output:
parameter 0 --> ./mytry.sh
This is on a current (year 2016) version of Bash, via Slackware 14.2
problem in %time:~0,2%
can't set to 24 hrs format, ended with space(1-9), instead of 0(1-9)
go around with:
set HR=%time:~0,2%
set HR=%Hr: =0% (replace space with 0 if any <has a space in between : =0>)
then replace %time:~0,2%
with %HR%
good luck
Ubuntu defaults to the OpenJDK packages. If you want to install Oracle's JDK, then you need to visit their download page, and grab the package from there.
Once you've installed the Oracle JDK, you also need to update the following (system defaults will point to OpenJDK):
export JAVA_HOME=/my/path/to/oracle/jdk
export PATH=$JAVA_HOME/bin:$PATH
If you want the Oracle JDK to be the default for your system, you will need to remove the OpenJDK packages, and update your profile environment variables.
Since python is installed on nearly every non-Windows OS by default now, the only thing you really need to make sure of is that all of the non-standard libraries you use are installed.
Having said that, it is possible to build executables that include the python interpreter, and any libraries you use. This is likely to create a large executable, however.
MacOS X even includes support in the Xcode IDE for creating full standalone GUI apps. These can be run by any user running OS X.
I simple gave below in all my browsers. I got image IIS7
http://localhost/
to get every unique value from your customer table, use
SELECT DISTINCT CName FROM customertable;
more in-depth of w3schools: https://www.w3schools.com/sql/sql_distinct.asp
#button {
line-height: 12px;
width: 18px;
font-size: 8pt;
font-family: tahoma;
margin-top: 1px;
margin-right: 2px;
position: absolute;
top: 0;
right: 0;
}
Uff! what is static initializer?
The static initializer is a static {}
block of code inside java class, and run only one time before the constructor or main method is called.
OK! Tell me more...
static { ... }
inside any java class. and executed by virtual machine when class is called.return
statements are supported.this
or super
are supported.Hmm where can I use it?
Can be used anywhere you feel ok :) that simple. But I see most of the time it is used when doing database connection, API init, Logging and etc.
Don't just bark! where is example?
package com.example.learnjava;
import java.util.ArrayList;
public class Fruit {
static {
System.out.println("Inside Static Initializer.");
// fruits array
ArrayList<String> fruits = new ArrayList<>();
fruits.add("Apple");
fruits.add("Orange");
fruits.add("Pear");
// print fruits
for (String fruit : fruits) {
System.out.println(fruit);
}
System.out.println("End Static Initializer.\n");
}
public static void main(String[] args) {
System.out.println("Inside Main Method.");
}
}
Output???
Inside Static Initializer.
Apple
Orange
Pear
End Static Initializer.
Inside Main Method.
Hope this helps!
Using -replace
$string = '% O0033(SUB RAD MSD 50R III) G91G1X-6.4Z-2.F500 G3I6.4Z-8.G3I6.4 G3R3.2X6.4F500 G91G0Z5. G91G1X-10.4 G3I10.4 G3R5.2X10.4 G90G0Z2. M99 %'
$program = $string -replace '^%\sO\d{4}\((.+?)\).+$','$1'
$program
SUB RAD MSD 50R III
It appears you no longer need toggleButton.setTextOff(textOff); and toggleButton.setTextOn(textOn);. The text for each toggled state will change by merely including the relevant xml characteristics. This will override the default ON/OFF text.
<ToggleButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/toggleText"
android:textOff="ADD TEXT"
android:textOn="CLOSE TEXT"
android:layout_centerHorizontal="true"
android:layout_marginTop="10dp"
android:visibility="gone"/>
If you simply want to check for permissions (rather than request for permissions), I wrote a simple extension like so:
fun BaseActivity.checkPermission(permissionName: String): Boolean {
return if (Build.VERSION.SDK_INT >= 23) {
val granted =
ContextCompat.checkSelfPermission(this, permissionName)
granted == PackageManager.PERMISSION_GRANTED
} else {
val granted =
PermissionChecker.checkSelfPermission(this, permissionName)
granted == PermissionChecker.PERMISSION_GRANTED
}
}
Now, if I want to check for a permission I can simply pass in a permission like so:
checkPermission(Manifest.permission.READ_CONTACTS)
var json = jQuery.parseJSON(s); //If you have jQuery.
Since the comment looks cluttered, please use the parse function after enclosing those square brackets inside the quotes.
var s=['{"Select":"11","PhotoCount":"12"}','{"Select":"21","PhotoCount":"22"}'];
Change the above code to
var s='[{"Select":"11","PhotoCount":"12"},{"Select":"21","PhotoCount":"22"}]';
Eg:
$(document).ready(function() {
var s= '[{"Select":"11","PhotoCount":"12"},{"Select":"21","PhotoCount":"22"}]';
s = jQuery.parseJSON(s);
alert( s[0]["Select"] );
});
And then use the parse function. It'll surely work.
EDIT :Extremely sorry that I gave the wrong function name. it's jQuery.parseJSON
Edit (30 April 2020):
Editing since I got an upvote for this answer. There's a browser native function available instead of JQuery (for nonJQuery users), JSON.parse("<json string here>")
$($("li").get().reverse()).each(function() { /* ... */ });
Or place the image in a location relative to a class and you don't need all that package/path info in the string itself.
com.xyz.SomeClassInThisPackage.class.getResource( "resources/camera.png" );
That way if you move the class to a different package, you dont have to find all the strings, you just move the class and its resources directory.
More precise:
$.each($('.testimonal'), function(index, value) {
console.log(index + ':' + value);
});
They mean different things.
If you use var
the variable is declared within the scope you are in (e.g. of the function). If you don't use var
, the variable bubbles up through the layers of scope until it encounters a variable by the given name or the global object (window, if you are doing it in the browser), where it then attaches. It is then very similar to a global variable. However, it can still be deleted with delete
(most likely by someone else's code who also failed to use var
). If you use var
in the global scope, the variable is truly global and cannot be deleted.
This is, in my opinion, one of the most dangerous issues with javascript, and should be deprecated, or at least raise warnings over warnings. The reason is, it's easy to forget var
and have by accident a common variable name bound to the global object. This produces weird and difficult to debug behavior.
just use abs for converting unsigned to signed in python
a=-12
b=abs(a)
print(b)
Output: 12
I had the same issue. The following steps solved the problem for me:
If the project is maven placed it in src/main/resources
, in the package phase it will copy it in ../WEB-INF/classes/hibernate.cfg.xml
Good solutions explained pretty well here. But Here is one more.
Create your own CustomContextWrapper
class extending ContextWrapper
and use it to change Locale setting for the complete application.
Here is a GIST with usage.
And then call the CustomContextWrapper
with saved locale identifier e.g. 'hi'
for Hindi language in activity lifecycle method attachBaseContext
. Usage here:
@Override
protected void attachBaseContext(Context newBase) {
// fetch from shared preference also save the same when applying. Default here is en = English
String language = MyPreferenceUtil.getInstance().getString("saved_locale", "en");
super.attachBaseContext(MyContextWrapper.wrap(newBase, language));
}
Normally there's no need for that. First of all
echo $CLASSPATH
If there's something in there, you probably want to check Applications -> Utilites -> Java.
in your css :
#txtComputer {
font-size: 24px;
}
You can style an input entirely (background, color, etc.) and even use the hover event.
QEMU has a fantastic utility called qmeu-img that will translate between all manner of disk image formats. An article on this process is at http://thedarkmaster.wordpress.com/2007/03/12/vmware-virtual-machine-to-virtual-box-conversion-how-to/
I recall in my head that I used qemu-img to roll multiple VMDKs into one, but I don't have that computer with me to retest the process. Even if I'm wrong, the article above includes a section that describes how to convert them with your VMWare tools.
LENGTH()
returns the length of the string measured in bytes.
CHAR_LENGTH()
returns the length of the string measured in characters.
This is especially relevant for Unicode, in which most characters are encoded in two bytes. Or UTF-8, where the number of bytes varies. For example:
select length(_utf8 '€'), char_length(_utf8 '€')
--> 3, 1
As you can see the Euro sign occupies 3 bytes (it's encoded as 0xE282AC
in UTF-8) even though it's only one character.
pygame
is not distributed via pip
. See this link which provides windows binaries ready for installation.
Finally, use these commands to install pygame wheel with pip
Python 2 (usually called pip)
pip install file.whl
Python 3 (usually called pip3)
pip3 install file.whl
Another tutorial for installing pygame for windows can be found here. Although the instructions are for 64bit windows, it can still be applied to 32bit
What about 1.1E10, +1, -0, etc? Parsing all possible numbers is trickier than many people think. If you want to include as many numbers are possible you should use the to_number function in a PL/SQL function. From http://www.oracle-developer.net/content/utilities/is_number.sql:
CREATE OR REPLACE FUNCTION is_number (str_in IN VARCHAR2) RETURN NUMBER IS
n NUMBER;
BEGIN
n := TO_NUMBER(str_in);
RETURN 1;
EXCEPTION
WHEN VALUE_ERROR THEN
RETURN 0;
END;
/
I have had to unpack a .ab
-file, too and found this post while looking for an answer. My suggested solution is Android Backup Extractor, a free Java tool for Windows, Linux and Mac OS.
Make sure to take a look at the README, if you encounter a problem. You might have to download further files, if your .ab
-file is password-protected.
Usage:java -jar abe.jar [-debug] [-useenv=yourenv] unpack <backup.ab> <backup.tar> [password]
Example:
Let's say, you've got a file test.ab
, which is not password-protected, you're using Windows and want the resulting .tar
-Archive to be called test.tar
. Then your command should be:
java.exe -jar abe.jar unpack test.ab test.tar ""
Move the config files from src/main/java
to src/main/resources
.
Here is one approach. ifelse
is vectorized and it checks all rows for zero values of b
and replaces est
with (a - 5)/2.53
if that is the case.
df <- transform(df, est = ifelse(b == 0, (a - 5)/2.53, est))
Try this method to get path of original
image captured by camera.
public String getOriginalImagePath() {
String[] projection = { MediaStore.Images.Media.DATA };
Cursor cursor = getActivity().managedQuery(
MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
projection, null, null, null);
int column_index_data = cursor
.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToLast();
return cursor.getString(column_index_data);
}
This method will return path of the last image captured by camera. So this path would be of original image not of thumbnail bitmap.
A JavaScript accordion does the trick.
This fiddle by W3Schools makes a simple task even more simple using nothing but javascript, which i partially reproduce below.
<head>
<style>
button.accordion {
background-color: #eee;
color: #444;
font-size: 15px;
cursor: pointer;
}
button.accordion.active, button.accordion:hover {
background-color: #ddd;
}
div.panel {
padding: 0 18px;
display: none;
background-color: white;
}
div.panel.show {
display: block;
}
</style>
</head><body>
<script>
var acc = document.getElementsByClassName("accordion");
var i;
for (i = 0; i < acc.length; i++) {
acc[i].onclick = function(){
this.classList.toggle("active");
this.nextElementSibling.classList.toggle("show");
}
}
</script>
...
<button class="accordion">Section 1</button>
<div class="panel">
<p>Lorem ipsum dolor sit amet</p>
</div>
...
<button class="accordion">Table</button>
<div class="panel">
<p><table name="detail_table">...</table></p>
</div>
...
<button class="accordion"><table name="button_table">...</table></button>
<div class="panel">
<p>Lorem ipsum dolor sit amet</p>
<table name="detail_table">...</table>
<img src=...></img>
</div>
...
</body></html>
if using php, don't forget to convert "
to '
. You can also use tables of data inside the button and it will still work.
Even though answers to this question are long overdue, but I'm still posting a nice solution that I came with some time ago and makes it really simple to send complex JSON to Asp.net MVC controller actions so they are model bound to whatever strong type parameters.
This plugin supports dates just as well, so they get converted to their DateTime
counterpart without a problem.
You can find all the details in my blog post where I examine the problem and provide code necessary to accomplish this.
All you have to do is to use this plugin on the client side. An Ajax request would look like this:
$.ajax({
type: "POST",
url: "SomeURL",
data: $.toDictionary(yourComplexJSONobject),
success: function() { ... },
error: function() { ... }
});
But this is just part of the whole problem. Now we are able to post complex JSON back to server, but since it will be model bound to a complex type that may have validation attributes on properties things may fail at that point. I've got a solution for it as well. My solution takes advantage of jQuery Ajax functionality where results can be successful or erroneous (just as shown in the upper code). So when validation would fail, error
function would get called as it's supposed to be.
This depends upon scenarios.
Let's say you have some business functionality and you need to process something with that value further but having null
value at time of processing would impact it.
Then, in that case, you can use Optional<?>
.
String nullName = null;
String name = Optional.ofNullable(nullName)
.map(<doSomething>)
.orElse("Default value in case of null");
Yes, you can have it on multiple lines using the white-space css property :)
input[type="submit"] {_x000D_
white-space: normal;_x000D_
width: 100px;_x000D_
}
_x000D_
<input type="submit" value="Some long text that won't fit." />
_x000D_
add this to your element
white-space: normal;
width: 100px;
Now that the Android 5.0 docs are available, we have the official documentation for the Toolbar widget:
A standard toolbar for use within application content.
A Toolbar is a generalization of action bars for use within application layouts. While an action bar is traditionally part of an Activity's opaque window decor controlled by the framework, a Toolbar may be placed at any arbitrary level of nesting within a view hierarchy.
A Toolbar
widget can also be used to replace the action bar:
An application may choose to designate a Toolbar as the action bar for an Activity using the
setActionBar()
method.
The deprecation of tabs in the action bar is most probably due to this, since toolbars cannot contain tab themselves.
Also, it's available for previous Android verions via the appcompat library. See this post by Chris Banes for more information. An excerpt:
Android 5.0 introduces a new Toolbar widget. This is a generalization of the ActionBar pattern but gives you much more control and flexibility in using it. Toolbar is a view in your hierarchy just like any other, making it easier to interleave with the rest of your views, animate, react to scroll events.
It would probably be easier to add the multi values to a table first and then you can join or whatever you'd like (even with wildcards) or save the data to another table for later use (or even add the values to another table).
Set the Parameter value via expression in the dataset:
="SELECT DISTINCT * FROM (VALUES('" & JOIN(Parameters!SearchValue.Value, "'),('") & "'))
AS tbl(Value)"
The query itself:
DECLARE @Table AS TABLE (Value nvarchar(max))
INSERT INTO @Table EXEC sp_executeSQL @SearchValue
Wildcard example:
SELECT * FROM YOUR_TABLE yt
INNER JOIN @Table rt ON yt.[Join_Value] LIKE '%' + rt.[Value] + '%'
I'd love to figure out a way to do it without dynamic SQL but I don't think it'll work due to the way SSRS passes the parameters to the actual query. If someone knows better, please let me know.
As you say, local variables and references are stored on the stack. When a method returns, the stack pointer is simply moved back to where it was before the method started, that is, all local data is "removed from the stack". Therefore, there is no garbage collection needed on the stack, that only happens in the heap.
To answer your specific questions:
You can use .issubset() as well
>>> {"key1", "key2"}.issubset({"key1":1, "key2":2, "key3": 3})
True
>>> {"key4", "key2"}.issubset({"key1":1, "key2":2, "key3": 3})
False
>>>
python compile on the fly when you run it.
Run a .py file by(linux): python abc.py
To control the precision of floating point arithmetic, you should use java.math.BigDecimal. Read The need for BigDecimal by John Zukowski for more information.
Given your example, the last line would be as following using BigDecimal.
import java.math.BigDecimal;
BigDecimal premium = BigDecimal.valueOf("1586.6");
BigDecimal netToCompany = BigDecimal.valueOf("708.75");
BigDecimal commission = premium.subtract(netToCompany);
System.out.println(commission + " = " + premium + " - " + netToCompany);
This results in the following output.
877.85 = 1586.6 - 708.75
This should get you started:
set datafile separator ","
plot 'infile' using 0:1
The documentation is your friend, NSString
supports a call substringWithRange
that can shorten the string that you have an return the shortened String. You cannot modify an instance of NSString
it is immutable. If you have an NSMutableString
is has a method called deleteCharactersInRange
that can modify the string in place
...
NSRange r;
r.location = 0;
r.size = [mutable length]-1;
NSString* shorted = [stringValue substringWithRange:r];
...
A way to do this without Linq & Lambdas
string source = "a,b, b, c";
string[] items = source.Split(new char[] { ',', ' ' }, StringSplitOptions.RemoveEmptyEntries);
Just backgrounding your script (./myscript &
) will not daemonize it. See http://www.faqs.org/faqs/unix-faq/programmer/faq/, section 1.7, which describes what's necessary to become a daemon. You must disconnect it from the terminal so that SIGHUP
does not kill it. You can take a shortcut to make a script appear to act like a daemon;
nohup ./myscript 0<&- &>/dev/null &
will do the job. Or, to capture both stderr and stdout to a file:
nohup ./myscript 0<&- &> my.admin.log.file &
However, there may be further important aspects that you need to consider. For example:
chdir("/")
(or cd /
inside your script), and fork so that the parent exits, and thus the original descriptor is closed.umask 0
. You may not want to depend on the umask of the caller of the daemon.For an example of a script that takes all of these aspects into account, see Mike S' answer.
One more way without explicit route:
async reload(url: string): Promise<boolean> {
await this.router.navigateByUrl('.', { skipLocationChange: true });
return this.router.navigateByUrl(url);
}
The best way to get rid on it is adding or modifying the data-interval attribute like this:
<div data-ride="carousel" class="carousel slide" data-interval="10000" id="myCarousel">
It's specified on ms like it's usually on js, so 1000 = 1s, 3000 = 3s... 10000 = 10s.
By the way you can also specify it at 0 for not sliding automatically. It's useful when showing product images on mobile for example.
<div data-ride="carousel" class="carousel slide" data-interval="0" id="myCarousel">
Sticky footer solutions that rely upon fixed-height footers are falling out of favour in with responsive approaches (where the height of the footer often changes at different break points). The simplest responsive sticky footer solution I've seen involves using display: table
on a top-level container, e.g.:
http://galengidman.com/2014/03/25/responsive-flexible-height-sticky-footers-in-css/
http://timothy-long.com/responsive-sticky-footer/
http://www.visualdecree.co.uk/posts/2013/12/17/responsive-sticky-footers/
You can call view.setVisibility(View.GONE)
if you want to remove it from the layout.
Or view.setVisibility(View.INVISIBLE)
if you just want to hide it.
From Android Docs:
INVISIBLE
This view is invisible, but it still takes up space for layout purposes. Use with
setVisibility(int)
andandroid:visibility
.GONE
This view is invisible, and it doesn't take any space for layout purposes. Use with
setVisibility(int)
andandroid:visibility
.
Add:
fastcgi_buffers 16 16k;
fastcgi_buffer_size 32k;
proxy_buffer_size 128k;
proxy_buffers 4 256k;
proxy_busy_buffers_size 256k;
To server{} in nginx.conf
Works for me.
From Files and Filegroups Architecture
Secondary data files
Secondary data files make up all the data files, other than the primary data file. Some databases may not have any secondary data files, while others have several secondary data files. The recommended file name extension for secondary data files is .ndf.
Also from file extension NDF - Microsoft SQL Server secondary data file
See Understanding Files and Filegroups
Secondary data files are optional, are user-defined, and store user data. Secondary files can be used to spread data across multiple disks by putting each file on a different disk drive. Additionally, if a database exceeds the maximum size for a single Windows file, you can use secondary data files so the database can continue to grow.
The recommended file name extension for secondary data files is .ndf.
/
For example, three files, Data1.ndf, Data2.ndf, and Data3.ndf, can be created on three disk drives, respectively, and assigned to the filegroup fgroup1. A table can then be created specifically on the filegroup fgroup1. Queries for data from the table will be spread across the three disks; this will improve performance. The same performance improvement can be accomplished by using a single file created on a RAID (redundant array of independent disks) stripe set. However, files and filegroups let you easily add new files to new disks.
The constructor is called only once, so you can safely do what you want, however the disadvantage of calling methods from within the constructor, rather than directly, is that you don't get direct feedback if the method fails. This gets more difficult the more methods you call.
One solution is to provide methods that you can call to query the 'health' of the object once it's been constructed. For example the method isConfigOK()
can be used to see if the config read operation was OK.
Another solution is to throw exceptions in the constructor upon failure, but it really depends on how 'fatal' these failures are.
class A
{
Map <String,String> config = null;
public A()
{
readConfig();
}
protected boolean readConfig()
{
...
}
public boolean isConfigOK()
{
// Check config here
return true;
}
};
If you are using spring-boot, this is the best answer.
I feel that @PostConstruct
and other various life cycle interjections are round-about ways. These can lead directly to runtime issues or cause less than obvious defects due to unexpected bean/context lifecycle events. Why not just directly invoke your bean using plain Java? You still invoke the bean the 'spring way' (eg: through the spring AoP proxy). And best of all, it's plain java, can't get any simpler than that. No need for context listeners or odd schedulers.
@SpringBootApplication
public class DemoApplication {
public static void main(String[] args) {
ConfigurableApplicationContext app = SpringApplication.run(DemoApplication.class, args);
MyBean myBean = (MyBean)app.getBean("myBean");
myBean.invokeMyEntryPoint();
}
}
It is indeed possible with the following code
<div href="#" id='a'>
Hover me
</div>
<div id='b'>
Show me
</div>
and css
#a {
display: block;
}
#a:hover + #b {
display:block;
}
#b {
display:none;
}
Now by hovering on element #a shows element #b.
you can use below code to get email address after ? in the URL
<?php_x000D_
if (isset($_GET['email'])) {_x000D_
echo $_GET['email'];_x000D_
}
_x000D_
http_get_request_body()
was explicitly made for getting the body of PUT
and POST
requests as per the documentation http://php.net/manual/fa/function.http-get-request-body.php
-Filter only accepts a single string. -Include accepts multiple values, but qualifies the -Path argument. The trick is to append \*
to the end of the path, and then use -Include to select multiple extensions. BTW, quoting strings is unnecessary in cmdlet arguments unless they contain spaces or shell special characters.
Get-ChildItem $originalPath\* -Include *.gif, *.jpg, *.xls*, *.doc*, *.pdf*, *.wav*, .ppt*
Note that this will work regardless of whether $originalPath ends in a backslash, because multiple consecutive backslashes are interpreted as a single path separator. For example, try:
Get-ChildItem C:\\\\\Windows
Adding to @Joe Johnston's answer, this will also accept:
+16444444444,,241119933
(Required for Apple's special character support for dial-ins - https://support.apple.com/kb/PH18551?locale=en_US)
\(?\+[0-9]{1,3}\)? ?-?[0-9]{1,3} ?-?[0-9]{3,5} ?-?[0-9]{4}( ?-?[0-9]{3})? ?([\w\,\@\^]{1,10}\s?\d{1,10})?
Note: Accepts upto 10 digits for extension code
In .Net 2.0, you can use Console.Beep().
// Default beep
Console.Beep();
You can also specify the frequency and length of the beep in milliseconds.
// Beep at 5000 Hz for 1 second
Console.Beep(5000, 1000);
For more information refer http://msdn.microsoft.com/en-us/library/8hftfeyw%28v=vs.110%29.aspx
I use Router and < Button/>. No < Link/>
<Button onClick={()=> {this.props.history.replace('/mypage')}}>
HERE
</Button>
This little function I made has always worked for me :)
String.prototype.deleteWord = function (searchTerm) {
var str = this;
var n = str.search(searchTerm);
while (str.search(searchTerm) > -1) {
n = str.search(searchTerm);
str = str.substring(0, n) + str.substring(n + searchTerm.length, str.length);
}
return str;
}
// Use it like this:
var string = "text is the cool!!";
string.deleteWord('the'); // Returns text is cool!!
I know it is not the best, but It has always worked for me :)
How can I display these open transactions and commit or cancel them?
There is no open transaction, MySQL will rollback the transaction upon disconnect.
You cannot commit the transaction (IFAIK).
You display threads using
SHOW FULL PROCESSLIST
See: http://dev.mysql.com/doc/refman/5.1/en/thread-information.html
It will not help you, because you cannot commit a transaction from a broken connection.
What happens when a connection breaks
From the MySQL docs: http://dev.mysql.com/doc/refman/5.0/en/mysql-tips.html
4.5.1.6.3. Disabling mysql Auto-Reconnect
If the mysql client loses its connection to the server while sending a statement, it immediately and automatically tries to reconnect once to the server and send the statement again. However, even if mysql succeeds in reconnecting, your first connection has ended and all your previous session objects and settings are lost: temporary tables, the autocommit mode, and user-defined and session variables. Also, any current transaction rolls back.
This behavior may be dangerous for you, as in the following example where the server was shut down and restarted between the first and second statements without you knowing it:
Also see: http://dev.mysql.com/doc/refman/5.0/en/auto-reconnect.html
How to diagnose and fix this
To check for auto-reconnection:
If an automatic reconnection does occur (for example, as a result of calling mysql_ping()), there is no explicit indication of it. To check for reconnection, call
mysql_thread_id()
to get the original connection identifier before callingmysql_ping()
, then callmysql_thread_id()
again to see whether the identifier has changed.
Make sure you keep your last query (transaction) in the client so that you can resubmit it if need be.
And disable auto-reconnect mode, because that is dangerous, implement your own reconnect instead, so that you know when a drop occurs and you can resubmit that query.
Jenkins does not show coverage results as it is a problem of version compatibilities between jenkins jacoco plugin and maven jacoco plugin. On my side I have fixed it by using a more recent version of maven jacoco plugin
<build>
<pluginManagement>
<plugins>
<plugin>
<groupId>org.jacoco</groupId>
<artifactId>jacoco-maven-plugin</artifactId>
<version>0.7.9</version>
</plugin>
<plugins>
<pluginManagement>
<build>
i found this in procmail package dependencies:
apt install liblockfile-bin
To run:
dotlockfile -l file.lock
file.lock will be created.
To unlock:
dotlockfile -u file.lock
Use this to list this package files / command:
dpkg-query -L liblockfile-bin
You can accomplish this using the function FILL to create filled polygons under the sections of your plots. You will want to plot the lines and polygons in the order you want them to be stacked on the screen, starting with the bottom-most one. Here's an example with some sample data:
x = 1:100; %# X range
y1 = rand(1,100)+1.5; %# One set of data ranging from 1.5 to 2.5
y2 = rand(1,100)+0.5; %# Another set of data ranging from 0.5 to 1.5
baseLine = 0.2; %# Baseline value for filling under the curves
index = 30:70; %# Indices of points to fill under
plot(x,y1,'b'); %# Plot the first line
hold on; %# Add to the plot
h1 = fill(x(index([1 1:end end])),... %# Plot the first filled polygon
[baseLine y1(index) baseLine],...
'b','EdgeColor','none');
plot(x,y2,'g'); %# Plot the second line
h2 = fill(x(index([1 1:end end])),... %# Plot the second filled polygon
[baseLine y2(index) baseLine],...
'g','EdgeColor','none');
plot(x(index),baseLine.*ones(size(index)),'r'); %# Plot the red line
And here's the resulting figure:
You can also change the stacking order of the objects in the figure after you've plotted them by modifying the order of handles in the 'Children'
property of the axes object. For example, this code reverses the stacking order, hiding the green polygon behind the blue polygon:
kids = get(gca,'Children'); %# Get the child object handles
set(gca,'Children',flipud(kids)); %# Set them to the reverse order
Finally, if you don't know exactly what order you want to stack your polygons ahead of time (i.e. either one could be the smaller polygon, which you probably want on top), then you could adjust the 'FaceAlpha'
property so that one or both polygons will appear partially transparent and show the other beneath it. For example, the following will make the green polygon partially transparent:
set(h2,'FaceAlpha',0.5);
If you're using Perl, download a module to parse the XML: XML::Simple, XML::Twig, or XML::LibXML. Don't re-invent the wheel.
%reset
seems to clear defined variables.
get_meta_tags
did not work with title.
Only meta tags with name attributes like
<meta name="description" content="the description">
will be parsed.
It works for me:
File imgFile = new File("/sdcard/Images/test_image.jpg");
if(imgFile.exists()){
Bitmap myBitmap = BitmapFactory.decodeFile(imgFile.getAbsolutePath());
//Drawable d = new BitmapDrawable(getResources(), myBitmap);
ImageView myImage = (ImageView) findViewById(R.id.imageviewTest);
myImage.setImageBitmap(myBitmap);
}
Edit:
If above hard-coded sdcard directory is not working in your case, you can fetch the sdcard path:
String sdcardPath = Environment.getExternalStorageDirectory().toString();
File imgFile = new File(sdcardPath);
This is not a bug but PHP normal behavior. It happens because the ==
operator in PHP doesn't check for type.
'' == null == 0 == false
If you want also to check if the values have the same type, use ===
instead. To study in deep this difference, please read the official documentation.
I think what you need is the below prototype
$(element).on('input',function(){code})
On both Operation Systems, must turnoff firewall. I using MS SERVER 2012 R2 & MS WIN-7 as a client. First of all call "RUN BOX" window logo button+ R, once RUN box appeared type "firewall.cpl" at Window Firewall setting you will see "Turn Window Firewall On or Off" like this you click it & chose "turn off window firewall" on both Private and Public Setting then OK. Ping again on guests OS. GOOD-LUCK Aungkokokhant
Do you have times associated with your dates? BETWEEN is inclusive, but when you convert 2013-10-18 to a date it becomes 2013-10-18 00:00:000.00. Anything that is logged after the first second of the 18th will not shown using BETWEEN, unless you include a time value.
Try:
SELECT * FROM LOGS WHERE CHECK_IN BETWEEN CONVERT(datetime,'2013-10-17') AND CONVERT(datetime,'2013-10-18 23:59:59:999')
if you want to search the entire day of the 18th.
SQL DATETIME fields have milliseconds. So I added 999 to the field.
Elaboration of @Thierry's answer with example.
There is no inbuilt pipe or method to get key and value
from the *ngFor loop. so we have to create custom pipe for the same. as thierry said here is the answer with code.
** The pipe class implements the PipeTransform interface's transform method that takes an input value and an optional array of parameter strings and returns the transformed value.
** The transform method is essential to a pipe. The PipeTransform interface defines that method and guides both tooling and the compiler. It is optional; Angular looks for and executes the transform method regardless. for more info regards pipe refer here
import {Component, Pipe, PipeTransform} from 'angular2/core';
import {CORE_DIRECTIVES, NgClass, FORM_DIRECTIVES, Control, ControlGroup, FormBuilder, Validators} from 'angular2/common';
@Component({
selector: 'my-app',
templateUrl: 'mytemplate.html',
directives: [CORE_DIRECTIVES, FORM_DIRECTIVES],
pipes: [KeysPipe]
})
export class AppComponent {
demo = {
'key1': 'ANGULAR 2',
'key2': 'Pardeep',
'key3': 'Jain',
}
}
@Pipe({name: 'keys'})
export class KeysPipe implements PipeTransform {
transform(value, args:string[]) : any {
let keys = [];
for (let key in value) {
keys.push({key: key, value: value[key]});
}
return keys;
}
}
and HTML part is:
<ul>
<li *ngFor='#key of demo | keys'>
Key: {{key.key}}, value: {{key.value}}
</li>
</ul>
Working Plnkr http://plnkr.co/edit/50LlK0k6OnMnkc2kNHM2?p=preview
as suggested by user6123723(thanks) in comment here is update.
<ul>
<li *ngFor='let key of demo | keys'>
Key: {{key.key}}, value: {{key.value}}
</li>
</ul>
Hibernate queries are case sensitive with property names (because they end up relying on getter/setter methods on the @Entity
).
Make sure you refer to the property as fileName
in the Criteria query, not filename
.
Specifically, Hibernate will call the getter method of the filename
property when executing that Criteria query, so it will look for a method called getFilename()
. But the property is called FileName
and the getter getFileName()
.
So, change the projection like so:
criteria.setProjection(Projections.property("fileName"));
I've tried to gather the best of other peoples answers into a step by step list of things to try in order:
gen
folder, including the R.java
file mentioned in some peoples answersJAVA_HOME
is set correctly. Follow the steps in this articleIf you complete the above list, and still haven't solved the issue, please leave a comment, or if you find something else that works, feel free to edit the answer and add your thing in.
For simple IE detection I tend to use:
(/msie|trident/i).test(navigator.userAgent)
Visit the Microsoft Developer Network to learn about the IE useragent: http://msdn.microsoft.com/library/ms537503.aspx
-- Applicable for SQL 2005+
USE YOUR_DATABASE_NAME //;
GO
SELECT [Scehma] = schema_name(o.schema_id)
,o.NAME
,o.type
FROM sys.sql_modules m
INNER JOIN sys.objects o ON o.object_id = m.object_id
WHERE m.DEFINITION LIKE '%YOUR SEARCH KEYWORDS%'
GO
$ rails server -b $IP -p $PORT - that solved the same problem for me
If you'd like to use CSS3, you can do it pretty simply using background-size, like so:
background-size: 100%;
It is supported by all major browsers (including IE9+). If you'd like to get it working in IE8 and before, check out the answers to this question.
PowerShell 3 has the $PSScriptRoot
automatic variable:
Contains the directory from which a script is being run.
In Windows PowerShell 2.0, this variable is valid only in script modules (.psm1). Beginning in Windows PowerShell 3.0, it is valid in all scripts.
Don't be fooled by the poor wording. PSScriptRoot
is the directory of the current file.
In PowerShell 2, you can calculate the value of $PSScriptRoot
yourself:
# PowerShell v2
$PSScriptRoot = Split-Path -Parent -Path $MyInvocation.MyCommand.Definition
You can do this assignment easily by using jquery. In this way, you can define number of row limitation. Furthermore, you can regular breakpoints height that want adding vertical scrolling. I must say that more than 3 rows get modify class and also height is 76px.
$(document).ready(function() {_x000D_
var length = $(this).find('li').length;_x000D_
if (length > 3) {_x000D_
$(".parent").addClass('modify');_x000D_
}_x000D_
})
_x000D_
/*for beauty*/_x000D_
_x000D_
ul {_x000D_
margin: 0 auto;_x000D_
width: 50%;_x000D_
border: 1px solid #ccc;_x000D_
padding: 3px;_x000D_
}_x000D_
_x000D_
ul li {_x000D_
padding: 3px;_x000D_
background: #ccc;_x000D_
margin: 2px 0;_x000D_
list-style: none;_x000D_
}_x000D_
_x000D_
/*main class*/_x000D_
_x000D_
.modify {_x000D_
overflow-y: scroll;_x000D_
height: 76px;_x000D_
}
_x000D_
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>_x000D_
_x000D_
<ul class="parent">_x000D_
<li>item 1</li>_x000D_
<li>item 2</li>_x000D_
<li>item 3</li>_x000D_
<li>item 4</li>_x000D_
</ul>
_x000D_
Use assets like a filesystem to dump any kind of files. And use res to store what it is made for, layouts, images, values.
you can also use Path from scala io to read and process files.
import scalax.file.Path
Now you can get file path using this:-
val filePath = Path("path_of_file_to_b_read", '/')
val lines = file.lines(includeTerminator = true)
You can also Include terminators but by default it is set to false..
use jQuery.noConflict()
var j = jQuery.noConflict();
j(document).ready(function(){
j('#datetimepicker').datepicker();
})
put this in your "head" of your index.html
<style>
html body{
left: 0;
right: 0;
bottom: 0;
top: 0;
margin: 0;
}
</style>
$('.block').scrollTop($('.block')[0].scrollHeight);
I use this code to scroll the chat when new messages arrive.
To summarize the excellent detailed explanations above, and in the simplest way I can think of, this is due to the limitations of the JVM built-in monitor, which 1) is acquired on the entire synchronization unit (block or object) and 2) does not discriminate about the specific condition being waited/notified on/about.
This means that if multiple threads are waiting on different conditions and notify() is used, the selected thread may not be the one which would make progress on the newly fulfilled condition - causing that thread (and other currently still waiting threads which would be able to fulfill the condition, etc..) not to be able to make progress, and eventually starvation or program hangup.
In contrast, notifyAll() enables all waiting threads to eventually re-acquire the lock and check for their respective condition, thereby eventually allowing progress to be made.
So notify() can be used safely only if any waiting thread is guaranteed to allow progress to be made should it be selected, which in general is satisfied when all threads within the same monitor check for only one and the same condition - a fairly rare case in real world applications.
private void listView1_MouseDown(object sender, MouseEventArgs e)
{
li = listView1.GetItemAt(e.X, e.Y);
X = e.X;
Y = e.Y;
}
private void listView1_MouseUp(object sender, MouseEventArgs e)
{
int nStart = X;
int spos = 0;
int epos = listView1.Columns[1].Width;
for (int i = 0; i < listView1.Columns.Count; i++)
{
if (nStart > spos && nStart < epos)
{
subItemSelected = i;
break;
}
spos = epos;
epos += listView1.Columns[i].Width;
}
li.SubItems[subItemSelected].Text = "9";
}
Basically, root volume (your entire virtual system disk) is ephemeral, but only if you choose to create AMI backed by Amazon EC2 instance store.
If you choose to create AMI backed by EBS then your root volume is backed by EBS and everything you have on your root volume will be saved between reboots.
If you are not sure what type of volume you have, look under EC2->Elastic Block Store->Volumes in your AWS console and if your AMI root volume is listed there then you are safe. Also, if you go to EC2->Instances and then look under column "Root device type" of your instance and if it says "ebs", then you don't have to worry about data on your root device.
More details here: http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/RootDeviceStorage.html
From what I've learned with Alex Cowan in the course Continuous Delivery & DevOps, CI and CD is part of a product pipeline that consists in the time it goes from an Observations to a Released Product.
From Observations to Designs the goal is to get high quality testable ideas. This part of the process is considered Continuous Design.
What happens after, when we go from the Code onwards, it's considered a Continuous Delivery capability whose aim is to execute the ideas and release to the customer very fast (you can read Jez Humble's book Continuous Delivery: Reliable Software Releases through Build, Test, and Deployment Automation for more details). The following pipeline explains which steps Continuous Integration (CI) and Continuous Delivery (CD) consist of.
Continuous Integration, as Mattias Petter Johansson explains,
is when a software team has habit of doing multiple merges per day and they have an automated verification system in place to check those merges for problems.
(you can watch the following two videos for a more pratical overview using CircleCI - Getting started with CircleCI - Continuous Integration P2 and Running CircleCI on Pull Request).
One can specify the CI/CD pipeline as following, that goes from New Code to a released Product.
The first three steps have to do with Tests, extending the boundary of what's being tested.
Continuous Deployment, on the other hand, is to handle the Deployment automatically. So, any code commit that passes the automated testing phase is automatically released into the production.
Note: This isn't necessarily what your pipelines should look like, yet they can serve as reference.
Java's parser in java.net.URI
is going to fail if the URI isn't fully encoded to its standards. For example, try to parse: http://www.google.com/search?q=cat|dog
. An exception will be thrown for the vertical bar.
urllib makes it easy to convert a string to a java.net.URI
. It will pre-process and escape the URL.
assertEquals("http://www.google.com/search?q=cat%7Cdog",
Urls.createURI("http://www.google.com/search?q=cat|dog").toString());
No. The only you can do is to add content (and not an element) using :before
or :after
pseudo-element.
More information: http://www.w3.org/TR/CSS2/generate.html#before-after-content
It also can be done using CSS and without tables or floats or fixed lengths by changing the content direction to rtl
and then back to ltr
, but the labels must go after each input.
To avoid this markup reordering, just set the label's text in a data-*
attribute and show it using an ::after
pseudo-element. I think it becomes much clearer.
Here is an example setting the label's text in a custom attribute called data-text
and showing them using the ::after
pseudo-element, so we don't mess with markup while changing direction
to rtl
and ltr
:
form
{
display: inline-block;
background-color: gold;
padding: 6px;
}
label{
display: block;
direction: rtl;
}
input{
direction: ltr;
}
label::after{
content: attr(data-text);
}
_x000D_
<form>
<label data-text="First Name">
<input type="text" />
</label>
<label data-text="Last Name">
<input type="text" />
</label>
<label data-text="E-mail">
<input type="text" />
</label>
</form>
_x000D_
When inserting the generated ID is saved into the instance of the object being saved (see below):
protected void btnInsertProductCategory_Click(object sender, EventArgs e)
{
ProductCategory productCategory = new ProductCategory();
productCategory.Name = “Sample Category”;
productCategory.ModifiedDate = DateTime.Now;
productCategory.rowguid = Guid.NewGuid();
int id = InsertProductCategory(productCategory);
lblResult.Text = id.ToString();
}
//Insert a new product category and return the generated ID (identity value)
private int InsertProductCategory(ProductCategory productCategory)
{
ctx.ProductCategories.InsertOnSubmit(productCategory);
ctx.SubmitChanges();
return productCategory.ProductCategoryID;
}
reference: http://blog.jemm.net/articles/databases/how-to-common-data-patterns-with-linq-to-sql/#4
Use sudo pip install scipy
to install the library so It cannot ask for permissions later
presentModalViewController:
MainViewController *mainViewController=[[MainViewController alloc]init];
[self.navigationController presentModalViewController:mainViewController animated:YES];
dismissModalViewController:
[self dismissModalViewControllerAnimated:YES];
You sure can.
The easiest way to see how you might do this is to browse to the aspx page you want to post to. Then save the source of that page as HTML. Change the action of the form on your new html page to point back to the aspx page you originally copied it from.
Add value tags to your form fields and put the data you want in there, then open the page and hit the submit button.
I could not use localStorage
directly in the Firefox (v27) console. I got the error:
[Exception... "Component is not available" nsresult: "0x80040111 (NS_ERROR_NOT_AVAILABLE)" location: "JS frame :: debugger eval code :: :: line 1" data: no]
What worked was:
window.content.localStorage
Short function to remove all non-numeric characters but keep the decimal (and return the number):
parseNum = str => +str.replace(/[^.\d]/g, '');_x000D_
let str = 'a1b2c.d3e';_x000D_
console.log(parseNum(str));
_x000D_
import user
u=user.User() #error on this line
Because of the lack of __init__ mentioned above, you would expect an ImportError which would make the problem clearer.
You don't get one because 'user' is also an existing module in the standard library. Your import statement grabs that one and tries to find the User class inside it; that doesn't exist and only then do you get the error.
It is generally a good idea to make your import absolute:
import Server.Models.user
to avoid this kind of ambiguity. Indeed from Python 2.7 'import user' won't look relative to the current module at all.
If you really want relative imports, you can have them explicitly in Python 2.5 and up using the somewhat ugly syntax:
from .user import User
What I have done in this situation is that I put in the option elements OnClick event like this:
<option onClick="something();">Option Name</option>
Then just create a script function like this:
function something(){
alert("Hello");
}
UPDATE:
Unfortunately I can't comment so I'm updating here
TrueBlueAussie apparently jsfiddle is having some issues, check here if it works or not: http://js.do/code/klm
It looks to me like the background images aren't actually background images...the site has the background images and the quotes in sibling divs with the children of the div containing the images having been assigned position: fixed; The quotes div is also given a transparent background.
wrapper div{
image wrapper div{
div for individual image{ <--- Fixed position
image <--- relative position
}
}
quote wrapper div{
div for individual quote{
quote
}
}
}
In order to get current date as integer(10 digit number), you need to divide the long returned from new Date().getTime() by 1000.
This will be in int range and is good until 18 Jan 2038.
Here is a complete list of steps - you may not need steps 1-3 but am including them for completeness:-
vscode:extension/vscjava.vscode-java-pack
and then clicking on the green Install button after it opens in VS Code.mvn archetype:generate -DgroupId=
com.companyname.appname-DartifactId=
appname-DarchetypeArtifactId=maven-archetype-quickstart -DinteractiveMode=false
. This will create an appname folder with Maven's Standard Directory Layout (i.e. src/main/java/com/companyname/appname
and src/main/test/com/companyname/appname
to begin with and a sample "Hello World!" Java file named appname.java
and associated unit test named appnameTest.java
).*Tasks: Configure task
then select Create tasks.json from template
.Choose maven ("Executes common Maven commands"). This creates a tasks.json file with "verify" and "test" tasks. More can be added corresponding to other Maven Build Lifecycle phases. To specifically address your requirement for classes to be built without a JAR file, a "compile" task would need to be added as follows:
{
"label": "compile",
"type": "shell",
"command": "mvn -B compile",
"group": "build"
},
Save the above changes and then open the Command Palette and select "Tasks: Run Build Task" then pick "compile" and then "Continue without scanning the task output". This invokes Maven, which creates a target
folder at the same level as the src
folder with the compiled class files in the target\classes
folder.
Addendum: How to run/debug a class
Following a question in the comments, here are some steps for running/debugging:-
In addition to the CSS you just added, remember you need to add the push div before closing the wrap div
The basic structure for the HTML is
<div id="wrap">
page content here
<div id="push"></div>
</div> <!-- end wrap -->
<div id="footer">
footer content here
</div> <!-- end footer -->
To expand upon Mr. Eels comment, you can do it like this:
File file = new File("C:\\A.txt");
FileWriter writer;
try {
writer = new FileWriter(file, true);
PrintWriter printer = new PrintWriter(writer);
printer.append("Sue");
printer.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
Don't say we ain't good to ya!
Without VBA...
If you can use a helper column, you can use the MATCH
function to test if a value in one column exists in another column (or in another column on another worksheet). It will return an Error if there is no match
To simply identify duplicates, use a helper column
Assume data in Sheet1, Column A, and another list in Sheet2, Column A. In your helper column, row 1, place the following formula:
=If(IsError(Match(A1, 'Sheet2'!A:A,False)),"","Duplicate")
Drag/copy this forumla down, and it should identify the duplicates.
To highlight cells, use conditional formatting:
With some tinkering, you can use this MATCH
function in a Conditional Formatting rule which would highlight duplicate values. I would probably do this instead of using a helper column, although the helper column is a great way to "see" results before you make the conditional formatting rule.
Something like:
=NOT(ISERROR(MATCH(A1, 'Sheet2'!A:A,FALSE)))
For Excel 2007 and prior, you cannot use conditional formatting rules that reference other worksheets. In this case, use the helper column and set your formatting rule in column A like:
=B1="Duplicate"
This screenshot is from the 2010 UI, but the same rule should work in 2007/2003 Excel.
This blog post is a great little cheat-sheet to keep handy when trying to format strings to a variety of formats.
link to trojan removed
Edit
The link was removed because Google temporarily warned that the site (or related site) may have been spreading malicious software. It is now off the list an no longer reported as problematic. Google "SteveX String Formatting" you'll find the search result and you can visit it at your discretion.
You can also use the option_context
, with one or more options:
with pd.option_context('display.max_rows', None, 'display.max_columns', None): # more options can be specified also
print(df)
This will automatically return the options to their previous values.
If you are working on jupyter-notebook, using display(df)
instead of print(df)
will use jupyter rich display logic (like so).
You can just use the fmt package fmt.Printf() method, more information: https://golang.org/pkg/fmt/
Another neat option is to use the Directive
as an element and not as an attribute.
@Directive({
selector: 'app-directive'
})
export class InformativeDirective implements AfterViewInit {
@Input()
public first: string;
@Input()
public second: string;
ngAfterViewInit(): void {
console.log(`Values: ${this.first}, ${this.second}`);
}
}
And this directive can be used like that:
<app-someKindOfComponent>
<app-directive [first]="'first 1'" [second]="'second 1'">A</app-directive>
<app-directive [first]="'First 2'" [second]="'second 2'">B</app-directive>
<app-directive [first]="'First 3'" [second]="'second 3'">C</app-directive>
</app-someKindOfComponent>`
Simple, neat and powerful.
Based on your requirements you can also do the following without libraries like jQuery:
Add this to your head:
window.onload = function () {
document.getElementById("frmSubmit").onsubmit = function onSubmit(form) {
var isValid = true;
//validate your elems here
isValid = false;
if (!isValid) {
alert("Please check your fields!");
return false;
}
else {
//you are good to go
return true;
}
}
}
And your form may still look something like:
<form id="frmSubmit" action="/Submit">
<input type="submit" value="Submit" />
</form>
rtrim(lastname)+','+rtrim(firstname) as [Person Name]
from Table
the result will show lastname,firstname as one column header !
import java.io.*;
public class FileRead {
public static void main(String[] args) throws IOException {
File f=new File("C:\\Documents and Settings\\abc\\Desktop\\abc.pdf");
OutputStream oos = new FileOutputStream("test.pdf");
byte[] buf = new byte[8192];
InputStream is = new FileInputStream(f);
int c = 0;
while ((c = is.read(buf, 0, buf.length)) > 0) {
oos.write(buf, 0, c);
oos.flush();
}
oos.close();
System.out.println("stop");
is.close();
}
}
The easiest way so far. Hope this helps.
Or you can use the fetch API
fetch(URL.createObjectURL(myBlob)).then(res => res.arrayBuffer())
I don't know what the performance difference is, and this will show up on your network tab in DevTools as well.
To plot just a selection of your columns you can select the columns of interest by passing a list to the subscript operator:
ax = df[['V1','V2']].plot(kind='bar', title ="V comp", figsize=(15, 10), legend=True, fontsize=12)
What you tried was df['V1','V2']
this will raise a KeyError
as correctly no column exists with that label, although it looks funny at first you have to consider that your are passing a list hence the double square brackets [[]]
.
import matplotlib.pyplot as plt
ax = df[['V1','V2']].plot(kind='bar', title ="V comp", figsize=(15, 10), legend=True, fontsize=12)
ax.set_xlabel("Hour", fontsize=12)
ax.set_ylabel("V", fontsize=12)
plt.show()
To cater for the schema as well, use this format in SQL 2014
if exists(select 1 from sys.views V inner join sys.[schemas] S on v.schema_id = s.schema_id where s.name='dbo' and v.name = 'someviewname' and v.type = 'v')
drop view [dbo].[someviewname];
go
And just throwing it out there, to do stored procedures, because I needed that too:
if exists(select 1
from sys.procedures p
inner join sys.[schemas] S on p.schema_id = s.schema_id
where
s.name='dbo' and p.name = 'someprocname'
and p.type in ('p', 'pc')
drop procedure [dbo].[someprocname];
go
qnd: use
read VARNAME
echo $VARNAME
for a one line response without readline support. Then test $VARNAME however you want.
This batch file can help, but it has some limitations. The filename characters = and % cannot be replaced (going from memory here) and an ^ in the filenames might be a problem too.
In this portion %newname: =_%
on every line in the lower block it replaces the character after :
with the character after =
so as it stands the bunch of characters are going to be replaced with an underscore.
Remove the echo
to activate the ren command as it will merely print the commands to the console window until you do.
It will only process the current folder, unless you add /s
to the DIR command portion and then it will process all folders under the current one too.
To delete a certain character, remove the character from after the = sign. In %newname:z=%
an entry like this would remove all z characters (case insensitive).
@echo off
for /f "delims=" %%a in ('dir /a:-d /o:n /b') do call :next "%%a"
pause
GOTO:EOF
:next
set "newname=%~nx1"
set "newname=%newname: =_%"
set "newname=%newname:)=_%"
set "newname=%newname:(=_%"
set "newname=%newname:&=_%"
set "newname=%newname:^=_%"
set "newname=%newname:$=_%"
set "newname=%newname:#=_%"
set "newname=%newname:@=_%"
set "newname=%newname:!=_%"
set "newname=%newname:-=_%"
set "newname=%newname:+=_%"
set "newname=%newname:}=_%"
set "newname=%newname:{=_%"
set "newname=%newname:]=_%"
set "newname=%newname:[=_%"
set "newname=%newname:;=_%"
set "newname=%newname:'=_%"
set "newname=%newname:`=_%"
set "newname=%newname:,=_%"
echo ren %1 "%newname%
For PHP
//Setup Array like so
$memcachedConfig = array(
"host" => "127.0.0.1",
"port" => "11211"
);
//Always a good practice to check if empty
if(isset($memcachedConfig['host']) && isset($memcachedConfig['port'])){
//Some codes
print_r ($memcachedConfig['host']);
print_r ($memcachedConfig['port']);
}
Just make sure to check that the value returning is not empty. So this example was for PHP so find out how to check if an array is empty in other languages.
USE MyDatabase
SELECT Count(*)
FROM INFORMATION_SCHEMA.TABLES
WHERE TABLE_TYPE = 'BASE TABLE';
to get table counts
SELECT COUNT(*)
FROM information_schema.tables
WHERE table_schema = 'dbName';
this also works
USE databasename;
SHOW TABLES;
SELECT FOUND_ROWS();
You can not test whole abstract class. In this case you have abstract methods, this mean that they should be implemented by class that extend given abstract class.
In that class programmer have to write the source code that is dedicated for logic of his.
In other words there is no sens of testing abstract class because you are not able to check the final behavior of it.
If you have major functionality not related to abstract methods in some abstract class, just create another class where the abstract method will throw some exception.