How to shutdown my Jenkins safely?
You can kill Jenkins safely. It will catch SIGTERM and SIGINT and perform an orderly shutdown. However, if Jenkins was in the middle of building something, it will abort the builds and they will show up gray in the status display.
If you want to avoid this, you must put Jenkins into shutdown mode to prevent it from starting new builds and wait until currently running builds are done before killing Jenkins.
You can also use the Jenkins command line interface and tell Jenkins to safe-shutdown, which does the same. You can find more info on Jenkins cli at http://YOURJENKINS/cli
Load text file as strings using numpy.loadtxt()
There is also read_csv in Pandas, which is fast and supports non-comma column separators and automatic typing by column:
import pandas as pd
df = pd.read_csv('your_file',sep='\t')
It can be converted to a NumPy array if you prefer that type with:
import numpy as np
arr = np.array(df)
This is by far the easiest and most mature text import approach I've come across.
What does "atomic" mean in programming?
In Java reading and writing fields of all types except long and double occurs atomically, and if the field is declared with the volatile modifier, even long and double are atomically read and written. That is, we get 100% either what was there, or what happened there, nor can there be any intermediate result in the variables.
Regular expression for address field validation
Just to add to Serzas' answer(since don't have enough reps. to comment).
alphabets and numbers can effectively be replaced by \w for words.
Additionally apostrophe,comma,period and hyphen doesn't necessarily need a backslash.
My requirement also involved front and back slashes so \/ and finally whitespaces with \s. The working regex for me ,as such was :
pattern: "[\w',-\\/.\s]"
Hibernate Criteria Query to get specific columns
You can use multiselect function for this.
CriteriaBuilder cb=session.getCriteriaBuilder();
CriteriaQuery<Object[]> cquery=cb.createQuery(Object[].class);
Root<Car> root=cquery.from(User.class);
cquery.multiselect(root.get("id"),root.get("Name"));
Query<Object[]> q=session.createQuery(cquery);
List<Object[]> list=q.getResultList();
System.out.println("id Name");
for (Object[] objects : list) {
System.out.println(objects[0]+" "+objects[1]);
}
This is supported by hibernate 5. createCriteria is deprecated in further version of hibernate. So you can use criteria builder instead.
Emulator error: This AVD's configuration is missing a kernel file
I tried what ChrLipp suggested, but that wasn't the problem, as the image was already installed. What I did was run:
android avd
to start the emulator manually. Then I stopped the emulator, and form that point on the
cca emulate android
app started working, without the "missing a kernel file" error.
How to get the bluetooth devices as a list?
I tried the below code,
main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/hello"
/>
<TextView
android:id="@+id/bluetoothstate"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
<Button
android:id="@+id/listpaireddevices"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="List Paired Devices"
android:enabled="false"
/>
<TextView
android:id="@+id/bluetoothstate"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
ListPairedDevicesActivity.java
import java.util.Set;
import android.app.ListActivity;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothClass;
import android.bluetooth.BluetoothDevice;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.ListView;
public class ListPairedDevicesActivity extends ListActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
ArrayAdapter<String> btArrayAdapter
= new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_1);
BluetoothAdapter bluetoothAdapter
= BluetoothAdapter.getDefaultAdapter();
Set<BluetoothDevice> pairedDevices
= bluetoothAdapter.getBondedDevices();
if (pairedDevices.size() > 0) {
for (BluetoothDevice device : pairedDevices) {
String deviceBTName = device.getName();
String deviceBTMajorClass
= getBTMajorDeviceClass(device
.getBluetoothClass()
.getMajorDeviceClass());
btArrayAdapter.add(deviceBTName + "\n"
+ deviceBTMajorClass);
}
}
setListAdapter(btArrayAdapter);
}
private String getBTMajorDeviceClass(int major){
switch(major){
case BluetoothClass.Device.Major.AUDIO_VIDEO:
return "AUDIO_VIDEO";
case BluetoothClass.Device.Major.COMPUTER:
return "COMPUTER";
case BluetoothClass.Device.Major.HEALTH:
return "HEALTH";
case BluetoothClass.Device.Major.IMAGING:
return "IMAGING";
case BluetoothClass.Device.Major.MISC:
return "MISC";
case BluetoothClass.Device.Major.NETWORKING:
return "NETWORKING";
case BluetoothClass.Device.Major.PERIPHERAL:
return "PERIPHERAL";
case BluetoothClass.Device.Major.PHONE:
return "PHONE";
case BluetoothClass.Device.Major.TOY:
return "TOY";
case BluetoothClass.Device.Major.UNCATEGORIZED:
return "UNCATEGORIZED";
case BluetoothClass.Device.Major.WEARABLE:
return "AUDIO_VIDEO";
default: return "unknown!";
}
}
@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
// TODO Auto-generated method stub
super.onListItemClick(l, v, position, id);
Intent intent = new Intent();
setResult(RESULT_OK, intent);
finish();
}
}
AndroidBluetooth.java
import android.app.Activity;
import android.bluetooth.BluetoothAdapter;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
public class AndroidBluetooth extends Activity {
private static final int REQUEST_ENABLE_BT = 1;
private static final int REQUEST_PAIRED_DEVICE = 2;
/** Called when the activity is first created. */
Button btnListPairedDevices;
TextView stateBluetooth;
BluetoothAdapter bluetoothAdapter;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
btnListPairedDevices = (Button)findViewById(R.id.listpaireddevices);
stateBluetooth = (TextView)findViewById(R.id.bluetoothstate);
bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
CheckBlueToothState();
btnListPairedDevices.setOnClickListener(btnListPairedDevicesOnClickListener);
}
private void CheckBlueToothState(){
if (bluetoothAdapter == null){
stateBluetooth.setText("Bluetooth NOT support");
}else{
if (bluetoothAdapter.isEnabled()){
if(bluetoothAdapter.isDiscovering()){
stateBluetooth.setText("Bluetooth is currently in device discovery process.");
}else{
stateBluetooth.setText("Bluetooth is Enabled.");
btnListPairedDevices.setEnabled(true);
}
}else{
stateBluetooth.setText("Bluetooth is NOT Enabled!");
Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
startActivityForResult(enableBtIntent, REQUEST_ENABLE_BT);
}
}
}
private Button.OnClickListener btnListPairedDevicesOnClickListener
= new Button.OnClickListener(){
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
Intent intent = new Intent();
intent.setClass(AndroidBluetooth.this, ListPairedDevicesActivity.class);
startActivityForResult(intent, REQUEST_PAIRED_DEVICE);
}};
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// TODO Auto-generated method stub
if(requestCode == REQUEST_ENABLE_BT){
CheckBlueToothState();
}if (requestCode == REQUEST_PAIRED_DEVICE){
if(resultCode == RESULT_OK){
}
}
}
}
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.test.AndroidBluetooth"
android:versionCode="1"
android:versionName="1.0">
<uses-sdk android:minSdkVersion="7" />
<uses-permission android:name="android.permission.BLUETOOTH"></uses-permission>
<application android:icon="@drawable/icon" android:label="@string/app_name">
<activity android:name=".AndroidBluetooth"
android:label="@string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".ListPairedDevicesActivity"
android:label="AndroidBluetooth: List of Paired Devices"/>
</application>
</manifest>
Java get String CompareTo as a comparator object
You may write your own comparator
public class ExampleComparator implements Comparator<String> {
public int compare(String obj1, String obj2) {
if (obj1 == obj2) {
return 0;
}
if (obj1 == null) {
return -1;
}
if (obj2 == null) {
return 1;
}
return obj1.compareTo(obj2);
}
}
Specify the date format in XMLGregorianCalendar
Yeah Got it...
Date dob=null;
DateFormat df=new SimpleDateFormat("dd/MM/yyyy");
dob=df.parse( "13/06/1983" );
GregorianCalendar cal = new GregorianCalendar();
cal.setTime(dob);
XMLGregorianCalendar xmlDate = DatatypeFactory.newInstance().newXMLGregorianCalendarDate(cal.get(Calendar.YEAR), cal.get(Calendar.MONTH)+1, cal.get(Calendar.DAY_OF_MONTH), DatatypeConstants.FIELD_UNDEFINED);
This will give it in correct format.
How to POST the data from a modal form of Bootstrap?
You need to handle it via ajax submit.
Something like this:
$(function(){
$('#subscribe-email-form').on('submit', function(e){
e.preventDefault();
$.ajax({
url: url, //this is the submit URL
type: 'GET', //or POST
data: $('#subscribe-email-form').serialize(),
success: function(data){
alert('successfully submitted')
}
});
});
});
A better way would be to use a django form, and then render the following snippet:
<form>
<div class="modal-body">
<input type="email" placeholder="email"/>
<p>This service will notify you by email should any issue arise that affects your plivo service.</p>
</div>
<div class="modal-footer">
<input type="submit" value="SUBMIT" class="btn"/>
</div>
</form>
via the context - example : {{form}}.
How do you use https / SSL on localhost?
This question is really old, but I came across this page when I was looking for the easiest and quickest way to do this. Using Webpack is much simpler:
install webpack-dev-server
npm i -g webpack-dev-server
start webpack-dev-server with https
webpack-dev-server --https
Validation for 10 digit mobile number and focus input field on invalid
Above code is correct but mobile validation is not perfect.
i modified as
$('#enquiry_form').validate({
rules:{
name:"required",
email:{
required:true,
email:true
},
mobile:{
required:true,
minlength:9,
maxlength:10,
number: true
},
messages:{
name:"Please enter your username..!",
email:"Please enter your email..!",
mobile:"Enter your mobile no"
},
submitHandler: function(form) {alert("working");
//write your success code here
}
});
Filling a List with all enum values in Java
There is a constructor for ArrayList which is
ArrayList(Collection<? extends E> c)
Now, EnumSet extends AbstractCollection so you can just do
ArrayList<Something> all = new ArrayList<Something>(enumSet)
iOS Detection of Screenshot?
Latest SWIFT 3:
func detectScreenShot(action: @escaping () -> ()) {
let mainQueue = OperationQueue.main
NotificationCenter.default.addObserver(forName: .UIApplicationUserDidTakeScreenshot, object: nil, queue: mainQueue) { notification in
// executes after screenshot
action()
}
}
In viewDidLoad, call this function
detectScreenShot { () -> () in
print("User took a screen shot")
}
However,
NotificationCenter.default.addObserver(self, selector: #selector(test), name: .UIApplicationUserDidTakeScreenshot, object: nil)
func test() {
//do stuff here
}
works totally fine. I don't see any points of mainQueue...
Round to 5 (or other number) in Python
Sorry, I wanted to comment on Alok Singhai's answer, but it won't let me due to a lack of reputation =/
Anyway, we can generalize one more step and go:
def myround(x, base=5):
return base * round(float(x) / base)
This allows us to use non-integer bases, like .25 or any other fractional base.
Array vs. Object efficiency in JavaScript
It's not really a performance question at all, since arrays and objects work very differently (or are supposed to, at least). Arrays have a continuous index 0..n, while objects map arbitrary keys to arbitrary values. If you want to supply specific keys, the only choice is an object. If you don't care about the keys, an array it is.
If you try to set arbitrary (numeric) keys on an array, you really have a performance loss, since behaviourally the array will fill in all indexes in-between:
> foo = [];
[]
> foo[100] = 'a';
"a"
> foo
[undefined, undefined, undefined, ..., "a"]
(Note that the array does not actually contain 99 undefined values, but it will behave this way since you're [supposed to be] iterating the array at some point.)
The literals for both options should make it very clear how they can be used:
var arr = ['foo', 'bar', 'baz']; // no keys, not even the option for it
var obj = { foo : 'bar', baz : 42 }; // associative by its very nature
Convert base-2 binary number string to int
If you wanna know what is happening behind the scene, then here you go.
class Binary():
def __init__(self, binNumber):
self._binNumber = binNumber
self._binNumber = self._binNumber[::-1]
self._binNumber = list(self._binNumber)
self._x = [1]
self._count = 1
self._change = 2
self._amount = 0
print(self._ToNumber(self._binNumber))
def _ToNumber(self, number):
self._number = number
for i in range (1, len (self._number)):
self._total = self._count * self._change
self._count = self._total
self._x.append(self._count)
self._deep = zip(self._number, self._x)
for self._k, self._v in self._deep:
if self._k == '1':
self._amount += self._v
return self._amount
mo = Binary('101111110')
Converting Secret Key into a String and Vice Versa
Converting SecretKeySpec to String and vice-versa:
you can use getEncoded() method in SecretKeySpec which will give byteArray, from that you can use encodeToString() to get string value of SecretKeySpec in Base64 object.
While converting SecretKeySpec to String: use decode() in Base64 will give byteArray, from that you can create instance for SecretKeySpec with the params as the byteArray to reproduce your SecretKeySpec.
String mAesKey_string;
SecretKeySpec mAesKey= new SecretKeySpec(secretKey.getEncoded(), "AES");
//SecretKeySpec to String
byte[] byteaes=mAesKey.getEncoded();
mAesKey_string=Base64.encodeToString(byteaes,Base64.NO_WRAP);
//String to SecretKeySpec
byte[] aesByte = Base64.decode(mAesKey_string, Base64.NO_WRAP);
mAesKey= new SecretKeySpec(aesByte, "AES");
Determine whether a key is present in a dictionary
My answer is "neither one".
I believe the most "Pythonic" way to do things is to NOT check beforehand if the key is in a dictionary and instead just write code that assumes it's there and catch any KeyErrors that get raised because it wasn't.
This is usually done with enclosing the code in a try...except clause and is a well-known idiom usually expressed as "It's easier to ask forgiveness than permission" or with the acronym EAFP, which basically means it is better to try something and catch the errors instead for making sure everything's OK before doing anything. Why validate what doesn't need to be validated when you can handle exceptions gracefully instead of trying to avoid them? Because it's often more readable and the code tends to be faster if the probability is low that the key won't be there (or whatever preconditions there may be).
Of course, this isn't appropriate in all situations and not everyone agrees with the philosophy, so you'll need to decide for yourself on a case-by-case basis. Not surprisingly the opposite of this is called LBYL for "Look Before You Leap".
As a trivial example consider:
if 'name' in dct:
value = dct['name'] * 3
else:
logerror('"%s" not found in dictionary, using default' % name)
value = 42
vs
try:
value = dct['name'] * 3
except KeyError:
logerror('"%s" not found in dictionary, using default' % name)
value = 42
Although in the case it's almost exactly the same amount of code, the second doesn't spend time checking first and is probably slightly faster because of it (try...except block isn't totally free though, so it probably doesn't make that much difference here).
Generally speaking, testing in advance can often be much more involved and the savings gain from not doing it can be significant. That said, if 'name' in dict: is better for the reasons stated in the other answers.
If you're interested in the topic, this message titled "EAFP vs LBYL (was Re: A little disappointed so far)" from the Python mailing list archive probably explains the difference between the two approached better than I have here. There's also a good discussion about the two approaches in the book Python in a Nutshell, 2nd Ed by Alex Martelli in chapter 6 on Exceptions titled Error-Checking Strategies. (I see there's now a newer 3rd edition, publish in 2017, which covers both Python 2.7 and 3.x).
ExecutorService that interrupts tasks after a timeout
After ton of time to survey,
Finally, I use invokeAll method of ExecutorService to solve this problem.
That will strictly interrupt the task while task running.
Here is example
ExecutorService executorService = Executors.newCachedThreadPool();
try {
List<Callable<Object>> callables = new ArrayList<>();
// Add your long time task (callable)
callables.add(new VaryLongTimeTask());
// Assign tasks for specific execution timeout (e.g. 2 sec)
List<Future<Object>> futures = executorService.invokeAll(callables, 2000, TimeUnit.MILLISECONDS);
for (Future<Object> future : futures) {
// Getting result
}
} catch (InterruptedException e) {
e.printStackTrace();
}
executorService.shutdown();
The pro is you can also submit ListenableFuture at the same ExecutorService.
Just slightly change the first line of code.
ListeningExecutorService executorService = MoreExecutors.listeningDecorator(Executors.newCachedThreadPool());
ListeningExecutorService is the Listening feature of ExecutorService at google guava project (com.google.guava) )
How can I reorder my divs using only CSS?
I have a much better code, made by me, it is so big, just to show both things... create a 4x4 table and vertical align more than just one cell.
It does not use any IE hack, no vertical-align:middle; at all...
It does not use for vertical centering display-table, display:table-rom; display:table-cell;
It uses the trick of a container that has two divs, one hidden (position is not the correct but makes parent have the correct variable size), one visible just after the hidden but with top:-50%; so it is mover to correct position.
See div classes that make the trick:
BloqueTipoContenedor
BloqueTipoContenedor_VerticalmenteCentrado
BloqueTipoContenido_VerticalmenteCentrado_Oculto
BloqueTipoContenido_VerticalmenteCentrado_Visible
Please sorry for using Spanish on classes names (it is because i speak spanish and this is so tricky that if i use English i get lost).
The full code:
<?xml version="1.0" encoding="iso-8859-1"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<meta http-equiv="Content-Language" content="en" />
<meta name="language" content="en" />
<title>Vertical Centering in CSS2 - Example (IE, FF & Chrome tested) - This is so tricky!!!</title>
<style type="text/css">
html,body{
margin:0px;
padding:0px;
width:100%;
height:100%;
}
div.BloqueTipoTabla{
display:table;margin:0px;border:0px;padding:0px;width:100%;height:100%;
}
div.BloqueTipoFila_AltoAjustadoAlContenido{
display:table-row;margin:0px;border:0px;padding:0px;width:100%;height:auto;
}
div.BloqueTipoFila_AltoRestante{
display:table-row;margin:0px;border:0px;padding:0px;width:100%;height:100%;
}
div.BloqueTipoCelda_AjustadoAlContenido{
display:table-cell;margin:0px;border:0px;padding:0px;width:auto;height:auto;
}
div.BloqueTipoCelda_RestanteAncho{
display:table-cell;margin:0px;border:0px;padding:0px;width:100%;height:auto;
}
div.BloqueTipoCelda_RestanteAlto{
display:table-cell;margin:0px;border:0px;padding:0px;width:auto;height:100%;
}
div.BloqueTipoCelda_RestanteAnchoAlto{
display:table-cell;margin:0px;border:0px;padding:0px;width:100%;height:100%;
}
div.BloqueTipoContenedor{
display:block;margin:0px;border:0px;padding:0px;width:100%;height:100%;position:relative;
}
div.BloqueTipoContenedor_VerticalmenteCentrado{
display:block;margin:0px;border:0px;padding:0px;width:100%;height:auto;position:relative;top:50%;
}
div.BloqueTipoContenido_VerticalmenteCentrado_Oculto{
display:block;margin:0px;border:0px;padding:0px;width:100%;height:auto;visibility:hidden;position:relative;top:50%;
}
div.BloqueTipoContenido_VerticalmenteCentrado_Visible{
display:block;margin:0px;border:0px;padding:0px;width:100%;height:auto;visibility:visible;position:absolute;top:-50%;
}
</style>
</head>
<body>
<h1>Vertical Centering in CSS2 - Example<br />(IE, FF & Chrome tested)<br />This is so tricky!!!</h1>
<div class="BloqueTipoTabla" style="margin:0px 0px 0px 25px;width:75%;height:66%;border:1px solid blue;">
<div class="BloqueTipoFila_AltoAjustadoAlContenido">
<div class="BloqueTipoCelda_AjustadoAlContenido">
[1,1]
</div>
<div class="BloqueTipoCelda_AjustadoAlContenido">
[1,2]
</div>
<div class="BloqueTipoCelda_RestanteAncho">
[1,3]
</div>
<div class="BloqueTipoCelda_AjustadoAlContenido">
[1,4]
</div>
</div>
<div class="BloqueTipoFila_AltoAjustadoAlContenido">
<div class="BloqueTipoCelda_AjustadoAlContenido">
[2,1]
</div>
<div class="BloqueTipoCelda_AjustadoAlContenido">
[2,2]
</div>
<div class="BloqueTipoCelda_RestanteAncho">
[2,3]
</div>
<div class="BloqueTipoCelda_AjustadoAlContenido">
[2,4]
</div>
</div>
<div class="BloqueTipoFila_AltoRestante">
<div class="BloqueTipoCelda_RestanteAlto">
<div class="BloqueTipoContenedor" style="border:1px solid lime;">
<div class="BloqueTipoContenedor_VerticalmenteCentrado" style="border:1px dotted red;">
<div class="BloqueTipoContenido_VerticalmenteCentrado_Oculto">
The cell [3,1]
<br />
* * * *
<br />
* * * *
<br />
* * * *
<br />
Now is the highest one
</div>
<div class="BloqueTipoContenido_VerticalmenteCentrado_Visible" style="border:1px dotted blue;">
The cell [3,1]
<br />
* * * *
<br />
* * * *
<br />
* * * *
<br />
Now is the highest one
</div>
</div>
</div>
</div>
<div class="BloqueTipoCelda_RestanteAlto">
<div class="BloqueTipoContenedor" style="border:1px solid lime;">
<div class="BloqueTipoContenedor_VerticalmenteCentrado" style="border:1px dotted red;">
<div class="BloqueTipoContenido_VerticalmenteCentrado_Oculto">
This is<br />cell [3,2]
</div>
<div class="BloqueTipoContenido_VerticalmenteCentrado_Visible" style="border:1px dotted blue;">
This is<br />cell [3,2]
</div>
</div>
</div>
</div>
<div class="BloqueTipoCelda_RestanteAnchoAlto">
<div class="BloqueTipoContenedor" style="border:1px solid lime;">
<div class="BloqueTipoContenedor_VerticalmenteCentrado" style="border:1px dotted red;">
<div class="BloqueTipoContenido_VerticalmenteCentrado_Oculto">
This is cell [3,3]
<br/>
It is duplicated on source to make the trick to know its variable height
<br />
First copy is hidden and second copy is visible
<br/>
Other cells of this row are not correctly aligned only on IE!!!
</div>
<div class="BloqueTipoContenido_VerticalmenteCentrado_Visible" style="border:1px dotted blue;">
This is cell [3,3]
<br/>
It is duplicated on source to make the trick to know its variable height
<br />
First copy is hidden and second copy is visible
<br/>
Other cells of this row are not correctly aligned only on IE!!!
</div>
</div>
</div>
</div>
<div class="BloqueTipoCelda_RestanteAlto">
<div class="BloqueTipoContenedor" style="border:1px solid lime;">
<div class="BloqueTipoContenedor_VerticalmenteCentrado" style="border:1px dotted red;">
<div class="BloqueTipoContenido_VerticalmenteCentrado_Oculto">
This other is<br />the cell [3,4]
</div>
<div class="BloqueTipoContenido_VerticalmenteCentrado_Visible" style="border:1px dotted blue;">
This other is<br />the cell [3,4]
</div>
</div>
</div>
</div>
</div>
<div class="BloqueTipoFila_AltoAjustadoAlContenido">
<div class="BloqueTipoCelda_AjustadoAlContenido">
[4,1]
</div>
<div class="BloqueTipoCelda_AjustadoAlContenido">
[4,2]
</div>
<div class="BloqueTipoCelda_RestanteAncho">
[4,3]
</div>
<div class="BloqueTipoCelda_AjustadoAlContenido">
[4,4]
</div>
</div>
</div>
</body>
</html>
How to delete all files from a specific folder?
string[] filePaths = Directory.GetFiles(@"c:\MyDir\");
foreach (string filePath in filePaths)
File.Delete(filePath);
Or in a single line:
Array.ForEach(Directory.GetFiles(@"c:\MyDir\"), File.Delete);
Fatal error: Can't open and lock privilege tables: Table 'mysql.host' doesn't exist
On CentOS EL 6 and perhaps on earlier versions there is one way to get into this same mess.
Install CentOS EL6 with a minimal installation. For example I used kickstart to install the following:
%packages
@core
acpid
bison
cmake
dhcp-common
flex
gcc
gcc-c++
git
libaio-devel
make
man
ncurses-devel
perl
ntp
ntpdate
pciutils
tar
tcpdump
wget
%end
You will find that one of the dependencies of the above list is mysql-libs. I found that my system has a default my.cnf in /etc and this contains:
[mysqld]
dataddir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
user=mysql
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
[mysqld_safe]
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
When you build from the Generic Linux (Architecture Independent), Compressed TAR Archive your default data directory is /usr/local/mysql/data which conflicts with the /etc/my.cnf already present which defines datadir=/var/lib/mysql. Also the pid-file defined in the same file does not have permissions for the mysql user/group to write to it in /var/run/mysqld.
A quick remedy is to mv /etc/my.cnf /etc/my.cnf.old which should get your generic source procedure working.
Of course the experience is different of you use the source RPMs.
Generating random numbers with Swift
you can use this in specific rate:
let die = [1, 2, 3, 4, 5, 6]
let firstRoll = die[Int(arc4random_uniform(UInt32(die.count)))]
let secondRoll = die[Int(arc4random_uniform(UInt32(die.count)))]
Convert string to integer type in Go?
If you control the input data, you can use the mini version
package main
import (
"testing"
"strconv"
)
func Atoi (s string) int {
var (
n uint64
i int
v byte
)
for ; i < len(s); i++ {
d := s[i]
if '0' <= d && d <= '9' {
v = d - '0'
} else if 'a' <= d && d <= 'z' {
v = d - 'a' + 10
} else if 'A' <= d && d <= 'Z' {
v = d - 'A' + 10
} else {
n = 0; break
}
n *= uint64(10)
n += uint64(v)
}
return int(n)
}
func BenchmarkAtoi(b *testing.B) {
for i := 0; i < b.N; i++ {
in := Atoi("9999")
_ = in
}
}
func BenchmarkStrconvAtoi(b *testing.B) {
for i := 0; i < b.N; i++ {
in, _ := strconv.Atoi("9999")
_ = in
}
}
the fastest option (write your check if necessary). Result :
Path>go test -bench=. atoi_test.go
goos: windows
goarch: amd64
BenchmarkAtoi-2 100000000 14.6 ns/op
BenchmarkStrconvAtoi-2 30000000 51.2 ns/op
PASS
ok path 3.293s
How to form tuple column from two columns in Pandas
Get comfortable with zip. It comes in handy when dealing with column data.
df['new_col'] = list(zip(df.lat, df.long))
It's less complicated and faster than using apply or map. Something like np.dstack is twice as fast as zip, but wouldn't give you tuples.
How to use getJSON, sending data with post method?
I just used post and an if:
data = getDataObjectByForm(form);
var jqxhr = $.post(url, data, function(){}, 'json')
.done(function (response) {
if (response instanceof Object)
var json = response;
else
var json = $.parseJSON(response);
// console.log(response);
// console.log(json);
jsonToDom(json);
if (json.reload != undefined && json.reload)
location.reload();
$("body").delay(1000).css("cursor", "default");
})
.fail(function (jqxhr, textStatus, error) {
var err = textStatus + ", " + error;
console.log("Request Failed: " + err);
alert("Fehler!");
});
Sending email with gmail smtp with codeigniter email library
send html email via codeiginater
$this->load->library('email');
$this->load->library('parser');
$this->email->clear();
$config['mailtype'] = "html";
$this->email->initialize($config);
$this->email->set_newline("\r\n");
$this->email->from('[email protected]', 'Website');
$list = array('[email protected]', '[email protected]');
$this->email->to($list);
$data = array();
$htmlMessage = $this->parser->parse('messages/email', $data, true);
$this->email->subject('This is an email test');
$this->email->message($htmlMessage);
if ($this->email->send()) {
echo 'Your email was sent, thanks chamil.';
} else {
show_error($this->email->print_debugger());
}
How to have multiple CSS transitions on an element?
Here's a LESS mixin for transitioning two properties at once:
.transition-two(@transition1, @transition1-duration, @transition2, @transition2-duration) {
-webkit-transition: @transition1 @transition1-duration, @transition2 @transition2-duration;
-moz-transition: @transition1 @transition1-duration, @transition2 @transition2-duration;
-o-transition: @transition1 @transition1-duration, @transition2 @transition2-duration;
transition: @transition1 @transition1-duration, @transition2 @transition2-duration;
}
What's the difference between process.cwd() vs __dirname?
Knowing the scope of each can make things easier to remember.
process is node's global object, and .cwd() returns where node is running.
__dirname is module's property, and represents the file path of the module. In node, one module resides in one file.
Similarly, __filename is another module's property, which holds the file name of the module.
Unique random string generation
I simplified @Michael Kropats solution and made a LINQ-esque version.
string RandomString(int length, string alphabet = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789")
{
var outOfRange = byte.MaxValue + 1 - (byte.MaxValue + 1) % alphabet.Length;
return string.Concat(
Enumerable
.Repeat(0, int.MaxValue)
.Select(e => RandomByte())
.Where(randomByte => randomByte < outOfRange)
.Take(length)
.Select(randomByte => alphabet[randomByte % alphabet.Length])
);
}
byte RandomByte()
{
using (var randomizationProvider = new RNGCryptoServiceProvider())
{
var randomBytes = new byte[1];
randomizationProvider.GetBytes(randomBytes);
return randomBytes.Single();
}
}
Finding first blank row, then writing to it
I know this is an older thread however I needed to write a function that returned the first blank row WITHIN a range. All of the code I found online actually searches the entire row (even the cells outside of the range) for a blank row. Data in ranges outside the search range was triggering a used row. This seemed to me to be a simple solution:
Function FirstBlankRow(ByVal rngToSearch As Range) As Long
Dim R As Range
Dim C As Range
Dim RowIsBlank As Boolean
For Each R In rngToSearch.Rows
RowIsBlank = True
For Each C In R.Cells
If IsEmpty(C.Value) = False Then RowIsBlank = False
Next C
If RowIsBlank Then
FirstBlankRow = R.Row
Exit For
End If
Next R
End Function
Java heap terminology: young, old and permanent generations?
What is the young generation?
The Young Generation is where all new objects are allocated and aged. When the young generation fills up, this causes a minor garbage collection. A young generation full of dead objects is collected very quickly. Some survived objects are aged and eventually move to the old generation.
What is the old generation?
The Old Generation is used to store long surviving objects. Typically, a threshold is set for young generation object and when that age is met, the object gets moved to the old generation. Eventually the old generation needs to be collected. This event is called a major garbage collection
What is the permanent generation?
The Permanent generation contains metadata required by the JVM to describe the classes and methods used in the application. The permanent generation is populated by the JVM at runtime based on classes in use by the application.
PermGen has been replaced with Metaspace since Java 8 release.
PermSize & MaxPermSize parameters will be ignored now
How does the three generations interact/relate to each other?
Image source & oracle technetwork tutorial article: http://www.oracle.com/webfolder/technetwork/tutorials/obe/java/gc01/index.html
"The General Garbage Collection Process" in above article explains the interactions between them with many diagrams.
Have a look at summary diagram:
Using the AND and NOT Operator in Python
Use the keyword and, not & because & is a bit operator.
Be careful with this... just so you know, in Java and C++, the & operator is ALSO a bit operator. The correct way to do a boolean comparison in those languages is &&. Similarly | is a bit operator, and || is a boolean operator. In Python and and or are used for boolean comparisons.
Another git process seems to be running in this repository
This happened to me and while sourcetree kept telling me the lock file exists, there was no such a file there for me to remove. So I just checked out another branch and then returned to the original branch and noticed this change fixed the issue.
ADB - Android - Getting the name of the current activity
Here is a solution that is easier than the command line adb solution (which does work). It is easier because it is more graphical and can be done from within Eclipse.
In Eclipse with Android device attached go to Window menu > Show View > Other ... use filter text "Windows" to pull up Android > Windows ... show this. The top item in the list is the current activity.
Another way to pull this up is by showing the "Hierarchy View" perspective, which by default will show the Windows window.
XML Error: There are multiple root elements
Wrap the xml in another element
<wrapper>
<parent>
<child>
Text
</child>
</parent>
<parent>
<child>
<grandchild>
Text
</grandchild>
<grandchild>
Text
</grandchild>
</child>
<child>
Text
</child>
</parent>
</wrapper>
Calling a function every 60 seconds
You can simply call setTimeout at the end of the function. This will add it again to the event queue. You can use any kind of logic to vary the delay values. For example,
function multiStep() {
// do some work here
blah_blah_whatever();
var newtime = 60000;
if (!requestStop) {
setTimeout(multiStep, newtime);
}
}
How to write subquery inside the OUTER JOIN Statement
You need the "correlation id" (the "AS SS" thingy) on the sub-select to reference the fields in the "ON" condition. The id's assigned inside the sub select are not usable in the join.
SELECT
cs.CUSID
,dp.DEPID
FROM
CUSTMR cs
LEFT OUTER JOIN (
SELECT
DEPID
,DEPNAME
FROM
DEPRMNT
WHERE
dp.DEPADDRESS = 'TOKYO'
) ss
ON (
ss.DEPID = cs.CUSID
AND ss.DEPNAME = cs.CUSTNAME
)
WHERE
cs.CUSID != ''
Update ViewPager dynamically?
for those who still face the same problem which i faced before when i have a ViewPager with 7 fragments. the default for these fragments to load the English content from API service but the problem here that i want to change the language from settings activity and after finish
settings activity i want ViewPager in main activity to refresh the fragments to match the language selection from the user and load the Arabic content if user chooses Arabic here what i did to work from the first time
1- You must use FragmentStatePagerAdapter as mentioned above.
2- on mainActivity i override the onResume and did the following
if (!(mPagerAdapter == null)) {
mPagerAdapter.notifyDataSetChanged();
}
3-i overrided the getItemPosition() in mPagerAdapter and make it return POSITION_NONE.
@Override
public int getItemPosition(Object object) {
return POSITION_NONE;
}
works like charm
How to completely hide the navigation bar in iPhone / HTML5
The problem with all of the answers given so far is that on the something borrowed site, the Mac bar remains totally hidden when scrolling up, and the provided answers don't accomplish that.
If you just use scrollTo and then the user later scrolls up, the nav bar is revealed again, so it seems you have to put the whole site inside of a div and force scrolling to happen inside of that div rather than on the body which keeps the nav bar hidden during scrolling in any direction.
You can, however, still reveal the nav bar by touching near the top of the screen on apple devices.
History or log of commands executed in Git
If you use Windows PowerShell, you could type "git" and the press F8. Continue to press F8 to cycle through all your git commands.
Or, if you use cygwin, you could do the same thing with ^R.
Undefined symbols for architecture armv7
I had this issue, when installing shareKit. It worked in the simulator, but not on the device. I removed -all_load from the Other Linker Flag and everything works fine in both simulator and iphone device.
Get row-index values of Pandas DataFrame as list?
To get the index values as a list/list of tuples for Index/MultiIndex do:
df.index.values.tolist() # an ndarray method, you probably shouldn't depend on this
or
list(df.index.values) # this will always work in pandas
How can I parse a YAML file from a Linux shell script?
If you need a single value you could a tool which converts your YAML document to JSON and feed to jq, for example yq.
Content of sample.yaml:
---
bob:
item1:
cats: bananas
item2:
cats: apples
thing:
cats: oranges
Example:
$ yq -r '.bob["thing"]["cats"]' sample.yaml
oranges
App.settings - the Angular way?
I figured out how to do this with InjectionTokens (see example below), and if your project was built using the Angular CLI you can use the environment files found in /environments for static application wide settings like an API endpoint, but depending on your project's requirements you will most likely end up using both since environment files are just object literals, while an injectable configuration using InjectionToken's can use the environment variables and since it's a class can have logic applied to configure it based on other factors in the application, such as initial http request data, subdomain, etc.
Injection Tokens Example
/app/app-config.module.ts
import { NgModule, InjectionToken } from '@angular/core';
import { environment } from '../environments/environment';
export let APP_CONFIG = new InjectionToken<AppConfig>('app.config');
export class AppConfig {
apiEndpoint: string;
}
export const APP_DI_CONFIG: AppConfig = {
apiEndpoint: environment.apiEndpoint
};
@NgModule({
providers: [{
provide: APP_CONFIG,
useValue: APP_DI_CONFIG
}]
})
export class AppConfigModule { }
/app/app.module.ts
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppConfigModule } from './app-config.module';
@NgModule({
declarations: [
// ...
],
imports: [
// ...
AppConfigModule
],
bootstrap: [AppComponent]
})
export class AppModule { }
Now you can just DI it into any component, service, etc:
/app/core/auth.service.ts
import { Injectable, Inject } from '@angular/core';
import { Http, Response } from '@angular/http';
import { Router } from '@angular/router';
import { Observable } from 'rxjs/Observable';
import 'rxjs/add/operator/map';
import 'rxjs/add/operator/catch';
import 'rxjs/add/observable/throw';
import { APP_CONFIG, AppConfig } from '../app-config.module';
import { AuthHttp } from 'angular2-jwt';
@Injectable()
export class AuthService {
constructor(
private http: Http,
private router: Router,
private authHttp: AuthHttp,
@Inject(APP_CONFIG) private config: AppConfig
) { }
/**
* Logs a user into the application.
* @param payload
*/
public login(payload: { username: string, password: string }) {
return this.http
.post(`${this.config.apiEndpoint}/login`, payload)
.map((response: Response) => {
const token = response.json().token;
sessionStorage.setItem('token', token); // TODO: can this be done else where? interceptor
return this.handleResponse(response); // TODO: unset token shouldn't return the token to login
})
.catch(this.handleError);
}
// ...
}
You can then also type check the config using the exported AppConfig.
New xampp security concept: Access Forbidden Error 403 - Windows 7 - phpMyAdmin
Require all granted seemed a bit to far for me. Looking at the documentation I used: Require ip 192.168 to allow all internal access.
<LocationMatch "^/(?i:(?:xampp|security|licenses|phpmyadmin|webalizer|server-status|server-info))">
Require local
Require ip 192.168
ErrorDocument 403 /error/XAMPP_FORBIDDEN.html.var
</LocationMatch>
Facebook OAuth "The domain of this URL isn't included in the app's domain"
first step:
use all https://example.in or ssl certificate URL ,
dont use http://example.in
second step:
faceboook application setting->basic setting->add your domain or subdomain
third step:
faceboook application login setting->Valid OAuth Redirect URIs->add your all redirect url after login
fourth step:
faceboook application setting->advance setting->Domain Manager->add your domain name
do all this step then use your application id, application version ,app secret for setup
Days between two dates?
Referencing my comments on other answers. This is how I would work out the difference in days based on 24 hours and calender days. the days attribute works well for 24 hours and the function works best for calendar checks.
from datetime import timedelta, datetime
def cal_days_diff(a,b):
A = a.replace(hour = 0, minute = 0, second = 0, microsecond = 0)
B = b.replace(hour = 0, minute = 0, second = 0, microsecond = 0)
return (A - B).days
if __name__ == '__main__':
x = datetime(2013, 06, 18, 16, 00)
y = datetime(2013, 06, 19, 2, 00)
print (y - x).days # 0
print cal_days_diff(y, x) # 1
z = datetime(2013, 06, 20, 2, 00)
print (z - x).days # 1
print cal_days_diff(z, x) # 2
c++ string array initialization
In C++11 and above, you can also initialize std::vector with an initializer list. For example:
using namespace std; // for example only
for (auto s : vector<string>{"one","two","three"} )
cout << s << endl;
So, your example would become:
void foo(vector<string> strArray){
// some code
}
vector<string> s {"hi", "there"}; // Works
foo(s); // Works
foo(vector<string> {"hi", "there"}); // also works
How do I pass data between Activities in Android application?
Create new Intent inside your current activity
String myData="Your string/data here";
Intent intent = new Intent(this, SecondActivity.class);
intent.putExtra("your_key",myData);
startActivity(intent);
Inside your SecondActivity.java onCreate() Retrieve those value using key your_key
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Bundle extras = getIntent().getExtras();
if (extras != null) {
String myData = extras.getString("your_key");
}
}
The SELECT permission was denied on the object 'sysobjects', database 'mssqlsystemresource', schema 'sys'
Execute this code on a good server which will provide you the complete rights for PUBLIC role. Copy the output and paste to the server with the issue. Execute. Try logging in again. It fixed our problem.
SELECT SDP.state_desc ,
SDP.permission_name ,
SSU.[name] AS "Schema" ,
SSO.[name] ,
SSO.[type]
FROM sys.sysobjects SSO
INNER JOIN sys.database_permissions SDP ON SSO.id = SDP.major_id
INNER JOIN sys.sysusers SSU ON SSO.uid = SSU.uid
ORDER BY SSU.[name] ,
SSO.[name]
Handling JSON Post Request in Go
There are two reasons why json.Decoder should be preferred over json.Unmarshal - that are not addressed in the most popular answer from 2013:
- February 2018,
go 1.10 introduced a new method json.Decoder.DisallowUnknownFields() which addresses the concern of detecting unwanted JSON-input
req.Body is already an io.Reader. Reading its entire contents and then performing json.Unmarshal wastes resources if the stream was, say a 10MB block of invalid JSON. Parsing the request body, with json.Decoder, as it streams in would trigger an early parse error if invalid JSON was encountered. Processing I/O streams in realtime is the preferred go-way.
Addressing some of the user comments about detecting bad user input:
To enforce mandatory fields, and other sanitation checks, try:
d := json.NewDecoder(req.Body)
d.DisallowUnknownFields() // catch unwanted fields
// anonymous struct type: handy for one-time use
t := struct {
Test *string `json:"test"` // pointer so we can test for field absence
}{}
err := d.Decode(&t)
if err != nil {
// bad JSON or unrecognized json field
http.Error(rw, err.Error(), http.StatusBadRequest)
return
}
if t.Test == nil {
http.Error(rw, "missing field 'test' from JSON object", http.StatusBadRequest)
return
}
// optional extra check
if d.More() {
http.Error(rw, "extraneous data after JSON object", http.StatusBadRequest)
return
}
// got the input we expected: no more, no less
log.Println(*t.Test)
Playground
Typical output:
$ curl -X POST -d "{}" http://localhost:8082/strict_test
expected json field 'test'
$ curl -X POST -d "{\"Test\":\"maybe?\",\"Unwanted\":\"1\"}" http://localhost:8082/strict_test
json: unknown field "Unwanted"
$ curl -X POST -d "{\"Test\":\"oops\"}g4rB4g3@#$%^&*" http://localhost:8082/strict_test
extraneous data after JSON
$ curl -X POST -d "{\"Test\":\"Works\"}" http://localhost:8082/strict_test
log: 2019/03/07 16:03:13 Works
How to get current url in view in asp.net core 1.0
The accepted answer helped me, as did the comment for it from @padigan but if you want to include the query-string parameters as was the case for me then try this:
@[email protected]()
And you will need to add @using Microsoft.AspNetCore.Http.Extensions in the view in order for the GetEncodedPathAndQuery() method to be available.
PHP strtotime +1 month adding an extra month
This should be
$endOfCycle=date('Y-m-d', strtotime("+30 days"));
strtotime
expects to be given a string containing a US English date format and will try to parse that format into a Unix timestamp (the number of seconds since January 1 1970 00:00:00 UTC), relative to the timestamp given in now, or the current time if now is not supplied.
while
date
Returns a string formatted according to the given format string using the given integer timestamp or the current time if no timestamp is given.
See the manual pages for:
AngularJS : How to watch service variables?
Here's my generic approach.
mainApp.service('aService',[function(){
var self = this;
var callbacks = {};
this.foo = '';
this.watch = function(variable, callback) {
if (typeof(self[variable]) !== 'undefined') {
if (!callbacks[variable]) {
callbacks[variable] = [];
}
callbacks[variable].push(callback);
}
}
this.notifyWatchersOn = function(variable) {
if (!self[variable]) return;
if (!callbacks[variable]) return;
angular.forEach(callbacks[variable], function(callback, key){
callback(self[variable]);
});
}
this.changeFoo = function(newValue) {
self.foo = newValue;
self.notifyWatchersOn('foo');
}
}]);
In Your Controller
function FooCtrl($scope, aService) {
$scope.foo;
$scope._initWatchers = function() {
aService.watch('foo', $scope._onFooChange);
}
$scope._onFooChange = function(newValue) {
$scope.foo = newValue;
}
$scope._initWatchers();
}
FooCtrl.$inject = ['$scope', 'aService'];
In Java, can you modify a List while iterating through it?
Java 8's stream() interface provides a great way to update a list in place.
To safely update items in the list, use map():
List<String> letters = new ArrayList<>();
// add stuff to list
letters = letters.stream().map(x -> "D").collect(Collectors.toList());
To safely remove items in place, use filter():
letters.stream().filter(x -> !x.equals("A")).collect(Collectors.toList());
How can I get zoom functionality for images?
Adding to @Mike's answer. I also needed double tap to restore the image to the original dimensions when first viewed. So I added a whole heap of "orig..." instance variables and added the SimpleOnGestureListener which did the trick.
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Matrix;
import android.graphics.PointF;
import android.view.GestureDetector;
import android.view.MotionEvent;
import android.view.ScaleGestureDetector;
import android.view.View;
import android.widget.ImageView;
public class TouchImageView extends ImageView {
Matrix matrix = new Matrix();
// We can be in one of these 3 states
static final int NONE = 0;
static final int DRAG = 1;
static final int ZOOM = 2;
int mode = NONE;
// Remember some things for zooming
PointF last = new PointF();
PointF start = new PointF();
float minScale = 1f;
float maxScale = 3f;
float[] m;
float redundantXSpace, redundantYSpace, origRedundantXSpace, origRedundantYSpace;;
float width, height;
static final int CLICK = 3;
static final float SAVE_SCALE = 1f;
float saveScale = SAVE_SCALE;
float right, bottom, origWidth, origHeight, bmWidth, bmHeight, origScale, origBottom,origRight;
ScaleGestureDetector mScaleDetector;
GestureDetector mGestureDetector;
Context context;
public TouchImageView(Context context) {
super(context);
super.setClickable(true);
this.context = context;
mScaleDetector = new ScaleGestureDetector(context, new ScaleListener());
matrix.setTranslate(1f, 1f);
m = new float[9];
setImageMatrix(matrix);
setScaleType(ScaleType.MATRIX);
setOnTouchListener(new OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
boolean onDoubleTapEvent = mGestureDetector.onTouchEvent(event);
if (onDoubleTapEvent) {
// Reset Image to original scale values
mode = NONE;
bottom = origBottom;
right = origRight;
last = new PointF();
start = new PointF();
m = new float[9];
saveScale = SAVE_SCALE;
matrix = new Matrix();
matrix.setScale(origScale, origScale);
matrix.postTranslate(origRedundantXSpace, origRedundantYSpace);
setImageMatrix(matrix);
invalidate();
return true;
}
mScaleDetector.onTouchEvent(event);
matrix.getValues(m);
float x = m[Matrix.MTRANS_X];
float y = m[Matrix.MTRANS_Y];
PointF curr = new PointF(event.getX(), event.getY());
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
last.set(event.getX(), event.getY());
start.set(last);
mode = DRAG;
break;
case MotionEvent.ACTION_MOVE:
if (mode == DRAG) {
float deltaX = curr.x - last.x;
float deltaY = curr.y - last.y;
float scaleWidth = Math.round(origWidth * saveScale);
float scaleHeight = Math.round(origHeight * saveScale);
if (scaleWidth < width) {
deltaX = 0;
if (y + deltaY > 0)
deltaY = -y;
else if (y + deltaY < -bottom)
deltaY = -(y + bottom);
} else if (scaleHeight < height) {
deltaY = 0;
if (x + deltaX > 0)
deltaX = -x;
else if (x + deltaX < -right)
deltaX = -(x + right);
} else {
if (x + deltaX > 0)
deltaX = -x;
else if (x + deltaX < -right)
deltaX = -(x + right);
if (y + deltaY > 0)
deltaY = -y;
else if (y + deltaY < -bottom)
deltaY = -(y + bottom);
}
matrix.postTranslate(deltaX, deltaY);
last.set(curr.x, curr.y);
}
break;
case MotionEvent.ACTION_UP:
mode = NONE;
int xDiff = (int) Math.abs(curr.x - start.x);
int yDiff = (int) Math.abs(curr.y - start.y);
if (xDiff < CLICK && yDiff < CLICK)
performClick();
break;
case MotionEvent.ACTION_POINTER_UP:
mode = NONE;
break;
}
setImageMatrix(matrix);
invalidate();
return true; // indicate event was handled
}
});
mGestureDetector = new GestureDetector(context, new GestureDetector.SimpleOnGestureListener() {
@Override
public boolean onDoubleTapEvent(MotionEvent e) {
return true;
}
});
}
@Override
public void setImageBitmap(Bitmap bm) {
super.setImageBitmap(bm);
bmWidth = bm.getWidth();
bmHeight = bm.getHeight();
}
public void setMaxZoom(float x) {
maxScale = x;
}
private class ScaleListener extends
ScaleGestureDetector.SimpleOnScaleGestureListener {
@Override
public boolean onScaleBegin(ScaleGestureDetector detector) {
mode = ZOOM;
return true;
}
@Override
public boolean onScale(ScaleGestureDetector detector) {
float mScaleFactor = (float) Math.min(
Math.max(.95f, detector.getScaleFactor()), 1.05);
float origScale = saveScale;
saveScale *= mScaleFactor;
if (saveScale > maxScale) {
saveScale = maxScale;
mScaleFactor = maxScale / origScale;
} else if (saveScale < minScale) {
saveScale = minScale;
mScaleFactor = minScale / origScale;
}
right = width * saveScale - width
- (2 * redundantXSpace * saveScale);
bottom = height * saveScale - height
- (2 * redundantYSpace * saveScale);
if (origWidth * saveScale <= width
|| origHeight * saveScale <= height) {
matrix.postScale(mScaleFactor, mScaleFactor, width / 2,
height / 2);
if (mScaleFactor < 1) {
matrix.getValues(m);
float x = m[Matrix.MTRANS_X];
float y = m[Matrix.MTRANS_Y];
if (mScaleFactor < 1) {
if (Math.round(origWidth * saveScale) < width) {
if (y < -bottom)
matrix.postTranslate(0, -(y + bottom));
else if (y > 0)
matrix.postTranslate(0, -y);
} else {
if (x < -right)
matrix.postTranslate(-(x + right), 0);
else if (x > 0)
matrix.postTranslate(-x, 0);
}
}
}
} else {
matrix.postScale(mScaleFactor, mScaleFactor,
detector.getFocusX(), detector.getFocusY());
matrix.getValues(m);
float x = m[Matrix.MTRANS_X];
float y = m[Matrix.MTRANS_Y];
if (mScaleFactor < 1) {
if (x < -right)
matrix.postTranslate(-(x + right), 0);
else if (x > 0)
matrix.postTranslate(-x, 0);
if (y < -bottom)
matrix.postTranslate(0, -(y + bottom));
else if (y > 0)
matrix.postTranslate(0, -y);
}
}
return true;
}
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
width = MeasureSpec.getSize(widthMeasureSpec);
height = MeasureSpec.getSize(heightMeasureSpec);
// Fit to screen.
float scale;
float scaleX = (float) width / (float) bmWidth;
float scaleY = (float) height / (float) bmHeight;
scale = Math.min(scaleX, scaleY);
matrix.setScale(scale, scale);
setImageMatrix(matrix);
saveScale = SAVE_SCALE;
origScale = scale;
// Center the image
redundantYSpace = (float) height - (scale * (float) bmHeight);
redundantXSpace = (float) width - (scale * (float) bmWidth);
redundantYSpace /= (float) 2;
redundantXSpace /= (float) 2;
origRedundantXSpace = redundantXSpace;
origRedundantYSpace = redundantYSpace;
matrix.postTranslate(redundantXSpace, redundantYSpace);
origWidth = width - 2 * redundantXSpace;
origHeight = height - 2 * redundantYSpace;
right = width * saveScale - width - (2 * redundantXSpace * saveScale);
bottom = height * saveScale - height
- (2 * redundantYSpace * saveScale);
origRight = right;
origBottom = bottom;
setImageMatrix(matrix);
}
}
How can I build multiple submit buttons django form?
It's an old question now, nevertheless I had the same issue and found a solution that works for me: I wrote MultiRedirectMixin.
from django.http import HttpResponseRedirect
class MultiRedirectMixin(object):
"""
A mixin that supports submit-specific success redirection.
Either specify one success_url, or provide dict with names of
submit actions given in template as keys
Example:
In template:
<input type="submit" name="create_new" value="Create"/>
<input type="submit" name="delete" value="Delete"/>
View:
MyMultiSubmitView(MultiRedirectMixin, forms.FormView):
success_urls = {"create_new": reverse_lazy('create'),
"delete": reverse_lazy('delete')}
"""
success_urls = {}
def form_valid(self, form):
""" Form is valid: Pick the url and redirect.
"""
for name in self.success_urls:
if name in form.data:
self.success_url = self.success_urls[name]
break
return HttpResponseRedirect(self.get_success_url())
def get_success_url(self):
"""
Returns the supplied success URL.
"""
if self.success_url:
# Forcing possible reverse_lazy evaluation
url = force_text(self.success_url)
else:
raise ImproperlyConfigured(
_("No URL to redirect to. Provide a success_url."))
return url
Calling one Activity from another in Android
The following code demonstrates how you can start another activity via an intent.
Start the activity with an intent connected to the specified class
Intent i = new Intent(this, ActivityTwo.class);
startActivity(i);
Activities which are started by other Android activities are called sub-activities. This wording makes it easier to describe which activity is meant.
Handling Enter Key in Vue.js
In vue 2, You can catch enter event with v-on:keyup.enter check the documentation:
https://vuejs.org/v2/guide/events.html#Key-Modifiers
I leave a very simple example:
_x000D_
_x000D_
var vm = new Vue({_x000D_
el: '#app',_x000D_
data: {msg: ''},_x000D_
methods: {_x000D_
onEnter: function() {_x000D_
this.msg = 'on enter event';_x000D_
}_x000D_
}_x000D_
});
_x000D_
<script src="https://cdn.jsdelivr.net/npm/vue"></script>_x000D_
_x000D_
<div id="app">_x000D_
<input v-on:keyup.enter="onEnter" />_x000D_
<h1>{{ msg }}</h1>_x000D_
</div>
_x000D_
_x000D_
_x000D_
Good luck
What Process is using all of my disk IO
To find out which processes in state 'D' (waiting for disk response) are currently running:
while true; do date; ps aux | awk '{if($8=="D") print $0;}'; sleep 1; done
or
watch -n1 -d "ps axu | awk '{if (\$8==\"D\") {print \$0}}'"
Wed Aug 29 13:00:46 CLT 2012
root 321 0.0 0.0 0 0 ? D May28 4:25 \_ [jbd2/dm-0-8]
Wed Aug 29 13:00:47 CLT 2012
Wed Aug 29 13:00:48 CLT 2012
Wed Aug 29 13:00:49 CLT 2012
Wed Aug 29 13:00:50 CLT 2012
root 321 0.0 0.0 0 0 ? D May28 4:25 \_ [jbd2/dm-0-8]
Wed Aug 29 13:00:51 CLT 2012
Wed Aug 29 13:00:52 CLT 2012
Wed Aug 29 13:00:53 CLT 2012
Wed Aug 29 13:00:55 CLT 2012
Wed Aug 29 13:00:56 CLT 2012
root 321 0.0 0.0 0 0 ? D May28 4:25 \_ [jbd2/dm-0-8]
Wed Aug 29 13:00:57 CLT 2012
root 302 0.0 0.0 0 0 ? D May28 3:07 \_ [kdmflush]
root 321 0.0 0.0 0 0 ? D May28 4:25 \_ [jbd2/dm-0-8]
Wed Aug 29 13:00:58 CLT 2012
root 302 0.0 0.0 0 0 ? D May28 3:07 \_ [kdmflush]
root 321 0.0 0.0 0 0 ? D May28 4:25 \_ [jbd2/dm-0-8]
Wed Aug 29 13:00:59 CLT 2012
root 302 0.0 0.0 0 0 ? D May28 3:07 \_ [kdmflush]
root 321 0.0 0.0 0 0 ? D May28 4:25 \_ [jbd2/dm-0-8]
Wed Aug 29 13:01:00 CLT 2012
root 302 0.0 0.0 0 0 ? D May28 3:07 \_ [kdmflush]
root 321 0.0 0.0 0 0 ? D May28 4:25 \_ [jbd2/dm-0-8]
Wed Aug 29 13:01:01 CLT 2012
root 302 0.0 0.0 0 0 ? D May28 3:07 \_ [kdmflush]
root 321 0.0 0.0 0 0 ? D May28 4:25 \_ [jbd2/dm-0-8]
Wed Aug 29 13:01:02 CLT 2012
Wed Aug 29 13:01:03 CLT 2012
root 321 0.0 0.0 0 0 ? D May28 4:25 \_ [jbd2/dm-0-8]
As you can see from the result, the jdb2/dm-0-8 (ext4 journal process), and kdmflush are constantly block your Linux.
For more details this URL could be helpful: Linux Wait-IO Problem
How to merge remote changes at GitHub?
You probably have changes on github that you never merged. Try git pull to fetch and merge the changes, then you should be able to push. Sorry if I misunderstood your question.
How do I tell if an object is a Promise?
it('should return a promise', function() {
var result = testedFunctionThatReturnsPromise();
expect(result).toBeDefined();
// 3 slightly different ways of verifying a promise
expect(typeof result.then).toBe('function');
expect(result instanceof Promise).toBe(true);
expect(result).toBe(Promise.resolve(result));
});
Using Alert in Response.Write Function in ASP.NET
Try using RegisterScriptBlock. Example from the link:
public void Page_Load(Object sender, EventArgs e)
{
// Define the name and type of the client scripts on the page.
String csname1 = "PopupScript";
String csname2 = "ButtonClickScript";
Type cstype = this.GetType();
// Get a ClientScriptManager reference from the Page class.
ClientScriptManager cs = Page.ClientScript;
// Check to see if the startup script is already registered.
if (!cs.IsStartupScriptRegistered(cstype, csname1))
{
String cstext1 = "alert('Hello World');";
cs.RegisterStartupScript(cstype, csname1, cstext1, true);
}
// Check to see if the client script is already registered.
if (!cs.IsClientScriptBlockRegistered(cstype, csname2))
{
StringBuilder cstext2 = new StringBuilder();
cstext2.Append("<script type=\"text/javascript\"> function DoClick() {");
cstext2.Append("Form1.Message.value='Text from client script.'} </");
cstext2.Append("script>");
cs.RegisterClientScriptBlock(cstype, csname2, cstext2.ToString(), false);
}
}
<modules runAllManagedModulesForAllRequests="true" /> Meaning
Modules Preconditions:
The IIS core engine uses preconditions to determine when to enable a particular module. Performance reasons, for example, might determine that you only want to execute managed modules for requests that also go to a managed handler. The precondition in the following example (precondition="managedHandler") only enables the forms authentication module for requests that are also handled by a managed handler, such as requests to .aspx or .asmx files:
<add name="FormsAuthentication" type="System.Web.Security.FormsAuthenticationModule" preCondition="managedHandler" />
If you remove the attribute precondition="managedHandler", Forms Authentication also applies to content that is not served by managed handlers, such as .html, .jpg, .doc, but also for classic ASP (.asp) or PHP (.php) extensions. See "How to Take Advantage of IIS Integrated Pipeline" for an example of enabling ASP.NET modules to run for all content.
You can also use a shortcut to enable all managed (ASP.NET) modules to run for all requests in your application, regardless of the "managedHandler" precondition.
To enable all managed modules to run for all requests without configuring each module entry to remove the "managedHandler" precondition, use the runAllManagedModulesForAllRequests property in the <modules> section:
<modules runAllManagedModulesForAllRequests="true" />
When you use this property, the "managedHandler" precondition has no effect and all managed modules run for all requests.
Copied from IIS Modules Overview: Preconditions
Git merge is not possible because I have unmerged files
Another potential cause for this (Intellij was involved in my case, not sure that mattered though): trying to merge in changes from a main branch into a branch off of a feature branch.
In other words, merging "main" into "current" in the following arrangement:
main
|
--feature
|
--current
I resolved all conflicts and GiT reported unmerged files and I was stuck until I merged from main into feature, then feature into current.
Use tab to indent in textarea
There is a library on Github for tab support in your textareas by wjbryant: Tab Override
This is how it works:
// get all the textarea elements on the page
var textareas = document.getElementsByTagName('textarea');
// enable Tab Override for all textareas
tabOverride.set(textareas);
How can I get input radio elements to horizontally align?
This also works like a charm
_x000D_
_x000D_
<form>_x000D_
<label class="radio-inline">_x000D_
<input type="radio" name="optradio" checked>Option 1_x000D_
</label>_x000D_
<label class="radio-inline">_x000D_
<input type="radio" name="optradio">Option 2_x000D_
</label>_x000D_
<label class="radio-inline">_x000D_
<input type="radio" name="optradio">Option 3_x000D_
</label>_x000D_
</form>
_x000D_
_x000D_
_x000D_
bower command not found
This turned out to NOT be a bower problem, though it showed up for me with bower.
It seems to be a node-which problem.
If a file is in the path, but has the setuid/setgid bit set, which will not find it.
Here is a files with the s bit set: (unix 'which' will find it with no problems).
ls -al /usr/local/bin
-rwxrwsr-- 110 root nmt 5535636 Jul 17 2012 git
Here is a node-which attempt:
> which.sync('git')
Error: not found: git
I change the permissions (chomd 755 git).
Now node-which can find it.
> which.sync('git')
'/usr/local/bin/git'
Hope this helps.
How to use onResume()?
The best way to understand would be to have all the LifeCycle methods overridden in your activity and placing a breakpoint(if checking in emulator) or a Log in each one of them. You'll get to know which one gets called when.
Just as an spoiler, onCreate() gets called first, then if you paused the activity by either going to home screen or by launching another activity, onPause() gets called. If the OS destroys the activity in the meantime, onDestroy() gets called. If you resume the app and the app already got destroyed, onCreate() will get called, or else onResume() will get called.
Edit: I forgot about onStop(), it gets called before onDestroy().
Do the exercise I mentioned and you'll be having a better understanding.
Creating all possible k combinations of n items in C++
If the number of the set would be within 32, 64 or a machine native primitive size, then you can do it with a simple bit manipulation.
template<typename T>
void combo(const T& c, int k)
{
int n = c.size();
int combo = (1 << k) - 1; // k bit sets
while (combo < 1<<n) {
pretty_print(c, combo);
int x = combo & -combo;
int y = combo + x;
int z = (combo & ~y);
combo = z / x;
combo >>= 1;
combo |= y;
}
}
this example calls pretty_print() function by the dictionary order.
For example. You want to have 6C3 and assuming the current 'combo' is 010110.
Obviously the next combo MUST be 011001.
011001 is :
010000 | 001000 | 000001
010000 : deleted continuously 1s of LSB side.
001000 : set 1 on the next of continuously 1s of LSB side.
000001 : shifted continuously 1s of LSB to the right and remove LSB bit.
int x = combo & -combo;
this obtains the lowest 1.
int y = combo + x;
this eliminates continuously 1s of LSB side and set 1 on the next of it (in the above case, 010000 | 001000)
int z = (combo & ~y)
this gives you the continuously 1s of LSB side (000110).
combo = z / x;
combo >> =1;
this is for 'shifted continuously 1s of LSB to the right and remove LSB bit'.
So the final job is to OR y to the above.
combo |= y;
Some simple concrete example :
#include <bits/stdc++.h>
using namespace std;
template<typename T>
void pretty_print(const T& c, int combo)
{
int n = c.size();
for (int i = 0; i < n; ++i) {
if ((combo >> i) & 1)
cout << c[i] << ' ';
}
cout << endl;
}
template<typename T>
void combo(const T& c, int k)
{
int n = c.size();
int combo = (1 << k) - 1; // k bit sets
while (combo < 1<<n) {
pretty_print(c, combo);
int x = combo & -combo;
int y = combo + x;
int z = (combo & ~y);
combo = z / x;
combo >>= 1;
combo |= y;
}
}
int main()
{
vector<char> c0 = {'1', '2', '3', '4', '5'};
combo(c0, 3);
vector<char> c1 = {'a', 'b', 'c', 'd', 'e', 'f', 'g'};
combo(c1, 4);
return 0;
}
result :
1 2 3
1 2 4
1 3 4
2 3 4
1 2 5
1 3 5
2 3 5
1 4 5
2 4 5
3 4 5
a b c d
a b c e
a b d e
a c d e
b c d e
a b c f
a b d f
a c d f
b c d f
a b e f
a c e f
b c e f
a d e f
b d e f
c d e f
a b c g
a b d g
a c d g
b c d g
a b e g
a c e g
b c e g
a d e g
b d e g
c d e g
a b f g
a c f g
b c f g
a d f g
b d f g
c d f g
a e f g
b e f g
c e f g
d e f g
Pandas: drop a level from a multi-level column index?
I have struggled with this problem since I don’t know why my droplevel() function does not work. Work through several and learn that ‘a’ in your table is columns name and ‘b’, ‘c’ are index. Do like this will help
df.columns.name = None
df.reset_index() #make index become label
How to get hex color value rather than RGB value?
Just to add to @Justin's answer above..
it should be
var rgb = document.querySelector('#selector').style['background-color'];
return '#' + rgb.substr(4, rgb.indexOf(')') - 4).split(',').map((color) => String("0" + parseInt(color).toString(16)).slice(-2)).join('');
As the above parse int functions truncates leading zeroes, thus produces incorrect color codes of 5 or 4 letters may be... i.e. for rgb(216, 160, 10) it produces #d8a0a while it should be #d8a00a.
Thanks
Apache VirtualHost 403 Forbidden
This may be a permissions problem.
every single parent path to the virtual document root must be Readable, Writable, and Executable by the web server httpd user
according to this page about Apache 403 errors.
Since you're using Allow from all, your order shouldn't matter, but you might try switching it to Deny,Allow to set the default behavior to "allowing."
Get name of current class?
PEP 3155 introduced __qualname__, which was implemented in Python 3.3.
For top-level functions and classes, the __qualname__ attribute is equal to the __name__ attribute. For nested classes, methods, and nested functions, the __qualname__ attribute contains a dotted path leading to the object from the module top-level.
It is accessible from within the very definition of a class or a function, so for instance:
class Foo:
print(__qualname__)
will effectively print Foo.
You'll get the fully qualified name (excluding the module's name), so you might want to split it on the . character.
However, there is no way to get an actual handle on the class being defined.
>>> class Foo:
... print('Foo' in globals())
...
False
What is App.config in C#.NET? How to use it?
At its simplest, the app.config is an XML file with many predefined configuration sections available and support for custom configuration sections. A "configuration section" is a snippet of XML with a schema meant to store some type of information.
Settings can be configured using built-in configuration sections such as connectionStrings or appSettings. You can add your own custom configuration sections; this is an advanced topic, but very powerful for building strongly-typed configuration files.
Web applications typically have a web.config, while Windows GUI/service applications have an app.config file.
Application-level config files inherit settings from global configuration files, e.g. the machine.config.
Reading from the App.Config
Connection strings have a predefined schema that you can use. Note that this small snippet is actually a valid app.config (or web.config) file:
<?xml version="1.0"?>
<configuration>
<connectionStrings>
<add name="MyKey"
connectionString="Data Source=localhost;Initial Catalog=ABC;"
providerName="System.Data.SqlClient"/>
</connectionStrings>
</configuration>
Once you have defined your app.config, you can read it in code using the ConfigurationManager class. Don't be intimidated by the verbose MSDN examples; it's actually quite simple.
string connectionString = ConfigurationManager.ConnectionStrings["MyKey"].ConnectionString;
Writing to the App.Config
Frequently changing the *.config files is usually not a good idea, but it sounds like you only want to perform one-time setup.
See: Change connection string & reload app.config at run time which describes how to update the connectionStrings section of the *.config file at runtime.
Note that ideally you would perform such configuration changes from a simple installer.
Location of the App.Config at Runtime
Q: Suppose I manually change some <value> in app.config, save it and then close it. Now when I go to my bin folder and launch the .exe file from here, why doesn't it reflect the applied changes?
A: When you compile an application, its app.config is copied to the bin directory1 with a name that matches your exe. For example, if your exe was named "test.exe", there should be a "text.exe.config" in your bin directory. You can change the configuration without a recompile, but you will need to edit the config file that was created at compile time, not the original app.config.
1: Note that web.config files are not moved, but instead stay in the same location at compile and deployment time. One exception to this is when a web.config is transformed.
.NET Core
New configuration options were introduced with .NET Core. The way that *.config files works does not appear to have changed, but developers are free to choose new, more flexible configuration paradigms.
Using Keras & Tensorflow with AMD GPU
Theano does have support for OpenCL but it is still in its early stages. Theano itself is not interested in OpenCL and relies on community support.
Most of the operations are already implemented and it is mostly a matter of tuning and optimizing the given operations.
To use the OpenCL backend you have to build libgpuarray yourself.
From personal experience I can tell you that you will get CPU performance if you are lucky. The memory allocation seems to be very naively implemented (therefore computation will be slow) and will crash when it runs out of memory. But I encourage you to try and maybe even optimize the code or help reporting bugs.
How can I transform string to UTF-8 in C#?
Use the below code snippet to get bytes from csv file
protected byte[] GetCSVFileContent(string fileName)
{
StringBuilder sb = new StringBuilder();
using (StreamReader sr = new StreamReader(fileName, Encoding.Default, true))
{
String line;
// Read and display lines from the file until the end of
// the file is reached.
while ((line = sr.ReadLine()) != null)
{
sb.AppendLine(line);
}
}
string allines = sb.ToString();
UTF8Encoding utf8 = new UTF8Encoding();
var preamble = utf8.GetPreamble();
var data = utf8.GetBytes(allines);
return data;
}
Call the below and save it as an attachment
Encoding csvEncoding = Encoding.UTF8;
//byte[] csvFile = GetCSVFileContent(FileUpload1.PostedFile.FileName);
byte[] csvFile = GetCSVFileContent("Your_CSV_File_NAme");
string attachment = String.Format("attachment; filename={0}.csv", "uomEncoded");
Response.Clear();
Response.ClearHeaders();
Response.ClearContent();
Response.ContentType = "text/csv";
Response.ContentEncoding = csvEncoding;
Response.AppendHeader("Content-Disposition", attachment);
//Response.BinaryWrite(csvEncoding.GetPreamble());
Response.BinaryWrite(csvFile);
Response.Flush();
Response.End();
How to access child's state in React?
As the previous answers saids, try to move the state to a top component and modify the state through callbacks passed to it's children.
In case that you really need to access to a child state that is declared as a functional component (hooks) you can declare a ref in the parent component, then pass it as a ref attribute to the child but you need to use React.forwardRef and then the hook useImperativeHandle to declare a function you can call in the parent component.
Take a look at the following example:
const Parent = () => {
const myRef = useRef();
return <Child ref={myRef} />;
}
const Child = React.forwardRef((props, ref) => {
const [myState, setMyState] = useState('This is my state!');
useImperativeHandle(ref, () => ({getMyState: () => {return myState}}), [myState]);
})
Then you should be able to get myState in the Parent component by calling:
myRef.current.getMyState();
How do I clear inner HTML
The h1 tags unfortunately do not receive the onmouseout events.
The simple Javascript snippet below will work for all elements and uses only 1 mouse event.
Note: "The borders in the snippet are applied to provide a visual demarcation of the elements."
_x000D_
_x000D_
document.body.onmousemove = function(){ move("The dog is in its shed"); };_x000D_
_x000D_
document.body.style.border = "2px solid red";_x000D_
document.getElementById("h1Tag").style.border = "2px solid blue";_x000D_
_x000D_
function move(what) {_x000D_
if(event.target.id == "h1Tag"){ document.getElementById("goy").innerHTML = "what"; } else { document.getElementById("goy").innerHTML = ""; }_x000D_
}
_x000D_
<h1 id="h1Tag">lalala</h1>_x000D_
<div id="goy"></div>
_x000D_
_x000D_
_x000D_
This can also be done in pure CSS by adding the hover selector css property to the h1 tag.
LINQ Where with AND OR condition
from item in db.vw_Dropship_OrderItems
where (listStatus != null ? listStatus.Contains(item.StatusCode) : true) &&
(listMerchants != null ? listMerchants.Contains(item.MerchantId) : true)
select item;
Might give strange behavior if both listMerchants and listStatus are both null.
HTML input field hint
I have the same problem, and I have add this code to my application and its work fine for me.
step -1 : added the jquery.placeholder.js plugin
step -2 :write the below code in your area.
$(function () {
$('input, textarea').placeholder();
});
And now I can see placeholders on the input boxes!
Failed to build gem native extension (installing Compass)
You could need to install Apple's Command Line Tools, which probably aren't installed on your system by default. I was getting the same error, but before following any of the instructions here I installed Command Line Tools (due to an unrelated issue) and lo and behold compass installed without issue when I tried again. YMMV.
jQuery ui datepicker with Angularjs
angular.module('elnApp')
.directive('jqdatepicker', function() {
return {
restrict: 'A',
require: 'ngModel',
link: function(scope, element, attrs, ctrl) {
$(element).datepicker({
dateFormat: 'dd.mm.yy',
onSelect: function(date) {
ctrl.$setViewValue(date);
ctrl.$render();
scope.$apply();
}
});
}
};
});
Compare two dates in Java
I would use JodaTime for this. Here is an example - lets say you want to find the difference in days between 2 dates.
DateTime startDate = new DateTime(some_date);
DateTime endDate = new DateTime(); //current date
Days diff = Days.daysBetween(startDate, endDate);
System.out.println(diff.getDays());
JodaTime can be downloaded from here.
How to get list of dates between two dates in mysql select query
Try:
select * from
(select adddate('1970-01-01',t4.i*10000 + t3.i*1000 + t2.i*100 + t1.i*10 + t0.i) selected_date from
(select 0 i union select 1 union select 2 union select 3 union select 4 union select 5 union select 6 union select 7 union select 8 union select 9) t0,
(select 0 i union select 1 union select 2 union select 3 union select 4 union select 5 union select 6 union select 7 union select 8 union select 9) t1,
(select 0 i union select 1 union select 2 union select 3 union select 4 union select 5 union select 6 union select 7 union select 8 union select 9) t2,
(select 0 i union select 1 union select 2 union select 3 union select 4 union select 5 union select 6 union select 7 union select 8 union select 9) t3,
(select 0 i union select 1 union select 2 union select 3 union select 4 union select 5 union select 6 union select 7 union select 8 union select 9) t4) v
where selected_date between '2012-02-10' and '2012-02-15'
-for date ranges up to nearly 300 years in the future.
[Corrected following a suggested edit by UrvishAtSynapse.]
How to run .jar file by double click on Windows 7 64-bit?
Your problem might also be inside your Java code setting, I mean, if your program somehow could not realize the main class/main file (entry point), it will not launch the the program/.jar (specially application built on IDE's). To solve that on an IDE :
- Right Click the project > Properties > Run > Browse Main Class > OK.
- Clean and Rebuild
Try running it now. Hope it helps
CSS @font-face not working with Firefox, but working with Chrome and IE
I had a similar problem. The fontsquirel demo page was working in FF but not my own page even though all files were coming from the same domain!
It turned out that I was linking my stylesheet with an absolute URL (http://example.com/style.css) so FF thought it was coming from a different domain. Changing my stylesheet link href to /style.css instead fixed things for me.
Troubleshooting "Illegal mix of collations" error in mysql
Adding my 2c to the discussion for future googlers.
I was investigating a similar issue where I got the following error when using custom functions that recieved a varchar parameter:
Illegal mix of collations (utf8_unicode_ci,IMPLICIT) and
(utf8_general_ci,IMPLICIT) for operation '='
Using the following query:
mysql> show variables like "collation_database";
+--------------------+-----------------+
| Variable_name | Value |
+--------------------+-----------------+
| collation_database | utf8_general_ci |
+--------------------+-----------------+
I was able to tell that the DB was using utf8_general_ci, while the tables were defined using utf8_unicode_ci:
mysql> show table status;
+--------------+-----------------+
| Name | Collation |
+--------------+-----------------+
| my_view | NULL |
| my_table | utf8_unicode_ci |
...
Notice that the views have NULL collation. It appears that views and functions have collation definitions even though this query shows null for one view. The collation used is the DB collation that was defined when the view/function were created.
The sad solution was to both change the db collation and recreate the views/functions to force them to use the current collation.
Changing the db's collation:
ALTER DATABASE mydb DEFAULT COLLATE utf8_unicode_ci;
Changing the table collation:
ALTER TABLE mydb CONVERT TO CHARACTER SET utf8 COLLATE utf8_unicode_ci;
I hope this will help someone.
How to access parent scope from within a custom directive *with own scope* in AngularJS?
Having tried everything, I finally came up with a solution.
Just place the following in your template:
{{currentDirective.attr = parentDirective.attr; ''}}
It just writes the parent scope attribute/variable you want to access to the current scope.
Also notice the ; '' at the end of the statement, it's to make sure there's no output in your template. (Angular evaluates every statement, but only outputs the last one).
It's a bit hacky, but after a few hours of trial and error, it does the job.
Connect Bluestacks to Android Studio
In my case I didn't needed start adb.exe. I only started the BlueStacks before android studio.
After that when I press "Run" in android studio, bluestacks is detected as a new emulator.
Regards.
How to use (install) dblink in PostgreSQL?
Since PostgreSQL 9.1, installation of additional modules is simple. Registered extensions like dblink can be installed with CREATE EXTENSION:
CREATE EXTENSION dblink;
Installs into your default schema, which is public by default. Make sure your search_path is set properly before you run the command. The schema must be visible to all roles who have to work with it. See:
Alternatively, you can install to any schema of your choice with:
CREATE EXTENSION dblink SCHEMA extensions;
See:
Run once per database. Or run it in the standard system database template1 to add it to every newly created DB automatically. Details in the manual.
You need to have the files providing the module installed on the server first. For Debian and derivatives this would be the package postgresql-contrib-9.1 - for PostgreSQL 9.1, obviously. Since Postgres 10, there is just a postgresql-contrib metapackage.
Return positions of a regex match() in Javascript?
var str = "The rain in SPAIN stays mainly in the plain";
function searchIndex(str, searchValue, isCaseSensitive) {
var modifiers = isCaseSensitive ? 'gi' : 'g';
var regExpValue = new RegExp(searchValue, modifiers);
var matches = [];
var startIndex = 0;
var arr = str.match(regExpValue);
[].forEach.call(arr, function(element) {
startIndex = str.indexOf(element, startIndex);
matches.push(startIndex++);
});
return matches;
}
console.log(searchIndex(str, 'ain', true));
Tracking Google Analytics Page Views with AngularJS
I found the gtag() function worked, instead of the ga() function.
In the index.html file, within the <head> section:
<script async src="https://www.googletagmanager.com/gtag/js?id=TrackingId"></script>
<script>
window.dataLayer = window.dataLayer || [];
function gtag(){dataLayer.push(arguments);}
gtag('js', new Date());
gtag('config', 'TrackingId');
</script>
In the AngularJS code:
app.run(function ($rootScope, $location) {
$rootScope.$on('$routeChangeSuccess', function() {
gtag('config', 'TrackingId', {'page_path': $location.path()});
});
});
Replace TrackingId with your own Tracking Id.
How to connect Bitbucket to Jenkins properly
I had this problem and it turned out the issue was that I had named my repository with CamelCase. Bitbucket automatically changes the URL of your repository to be all lower case and that gets sent to Jenkins in the webhook. Jenkins then searches for projects with a matching repository. If you, like me, have CamelCase in your repository URL in your project configuration you will be able to check out code, but the pattern matching on the webhook request will fail.
Just change your repo URL to be all lower case instead of CamelCase and the pattern match should find your project.
Cron job every three days
* * */3 * * that says, every minute of every hour on every three days.
0 0 */3 * * says at 00:00 (midnight) every three days.
Warning: mysqli_query() expects parameter 1 to be mysqli, resource given
You are mixing mysqli and mysql extensions, which will not work.
You need to use
$myConnection= mysqli_connect("$db_host","$db_username","$db_pass") or die ("could not connect to mysql");
mysqli_select_db($myConnection, "mrmagicadam") or die ("no database");
mysqli has many improvements over the original mysql extension, so it is recommended that you use mysqli.
How to set focus on input field?
I edit Mark Rajcok's focusMe directive to work for multiple focus in one element.
HTML:
<input focus-me="myInputFocus" type="text">
in AngularJs Controller:
$scope.myInputFocus= true;
AngulaJS Directive:
app.directive('focusMe', function ($timeout, $parse) {
return {
link: function (scope, element, attrs) {
var model = $parse(attrs.focusMe);
scope.$watch(model, function (value) {
if (value === true) {
$timeout(function () {
scope.$apply(model.assign(scope, false));
element[0].focus();
}, 30);
}
});
}
};
});
Compare and contrast REST and SOAP web services?
In day to day, practical programming terms, the biggest difference is in the fact that with SOAP you are working with static and strongly defined data exchange formats where as with REST and JSON data exchange formatting is very loose by comparison. For example with SOAP you can validate that exchanged data matches an XSD schema. The XSD therefore serves as a 'contract' on how the client and the server are to understand how the data being exchanged must be structured.
JSON data is typically not passed around according to a strongly defined format (unless you're using a framework that supports it .. e.g. http://msdn.microsoft.com/en-us/library/jj870778.aspx or implementing json-schema).
In-fact, some (many/most) would argue that the "dynamic" secret sauce of JSON goes against the philosophy/culture of constraining it by data contracts (Should JSON RESTful web services use data contract)
People used to working in dynamic loosely typed languages tend to feel more comfortable with the looseness of JSON while developers from strongly typed languages prefer XML.
http://www.mnot.net/blog/2012/04/13/json_or_xml_just_decide
Ant if else condition?
The if attribute does not exist for <copy>. It should be applied to the <target>.
Below is an example of how you can use the depends attribute of a target and the if and unless attributes to control execution of dependent targets. Only one of the two should execute.
<target name="prepare-copy" description="copy file based on condition"
depends="prepare-copy-true, prepare-copy-false">
</target>
<target name="prepare-copy-true" description="copy file based on condition"
if="copy-condition">
<echo>Get file based on condition being true</echo>
<copy file="${some.dir}/true" todir="." />
</target>
<target name="prepare-copy-false" description="copy file based on false condition"
unless="copy-condition">
<echo>Get file based on condition being false</echo>
<copy file="${some.dir}/false" todir="." />
</target>
If you are using ANT 1.8+, then you can use property expansion and it will evaluate the value of the property to determine the boolean value. So, you could use if="${copy-condition}" instead of if="copy-condition".
In ANT 1.7.1 and earlier, you specify the name of the property. If the property is defined and has any value (even an empty string), then it will evaluate to true.
How do you split a list into evenly sized chunks?
At this point, I think we need the obligatory anonymous-recursive function.
Y = lambda f: (lambda x: x(x))(lambda y: f(lambda *args: y(y)(*args)))
chunks = Y(lambda f: lambda n: [n[0][:n[1]]] + f((n[0][n[1]:], n[1])) if len(n[0]) > 0 else [])
Get a pixel from HTML Canvas?
If you want to extract a particular color of pixel by passing the coordinates of pixel into the function, this will come in handy:
var canvas = document.getElementById("canvas");
var ctx = canvas.getContext("2d");
function detectColor(x, y){
data=ctx.getImageData(x, y, 1, 1).data;
col={
r:data[0],
g:data[1],
b:data[2]
};
return col;
}
x, y is the coordinate you want to filter out color.
var color = detectColor(x, y)
The color is the object, you will get the RGB value by color.r, color.g, color.b.
.NET Format a string with fixed spaces
This will give you exactly the strings that you asked for:
string s = "String goes here";
string lineAlignedRight = String.Format("{0,27}", s);
string lineAlignedCenter = String.Format("{0,-27}",
String.Format("{0," + ((27 + s.Length) / 2).ToString() + "}", s));
string lineAlignedLeft = String.Format("{0,-27}", s);
Understanding slice notation
My brain seems happy to accept that lst[start:end] contains the start-th item. I might even say that it is a 'natural assumption'.
But occasionally a doubt creeps in and my brain asks for reassurance that it does not contain the end-th element.
In these moments I rely on this simple theorem:
for any n, lst = lst[:n] + lst[n:]
This pretty property tells me that lst[start:end] does not contain the end-th item because it is in lst[end:].
Note that this theorem is true for any n at all. For example, you can check that
lst = range(10)
lst[:-42] + lst[-42:] == lst
returns True.
Drop a temporary table if it exists
What you asked for is:
IF OBJECT_ID('tempdb..##CLIENTS_KEYWORD') IS NOT NULL
BEGIN
DROP TABLE ##CLIENTS_KEYWORD
CREATE TABLE ##CLIENTS_KEYWORD(client_id int)
END
ELSE
CREATE TABLE ##CLIENTS_KEYWORD(client_id int)
IF OBJECT_ID('tempdb..##TEMP_CLIENTS_KEYWORD') IS NOT NULL
BEGIN
DROP TABLE ##TEMP_CLIENTS_KEYWORD
CREATE TABLE ##TEMP_CLIENTS_KEYWORD(client_id int)
END
ELSE
CREATE TABLE ##TEMP_CLIENTS_KEYWORD(client_id int)
Since you're always going to create the table, regardless of whether the table is deleted or not; a slightly optimised solution is:
IF OBJECT_ID('tempdb..##CLIENTS_KEYWORD') IS NOT NULL
DROP TABLE ##CLIENTS_KEYWORD
CREATE TABLE ##CLIENTS_KEYWORD(client_id int)
IF OBJECT_ID('tempdb..##TEMP_CLIENTS_KEYWORD') IS NOT NULL
DROP TABLE ##TEMP_CLIENTS_KEYWORD
CREATE TABLE ##TEMP_CLIENTS_KEYWORD(client_id int)
Notepad++ Multi editing
You can add/edit content on multiple lines by using control button. This is multi edit feature in Notepad++, we need to enable it from settings. Press and hold control, select places where you want to enter text, release control and start typing, this will update the text at all the places selected previously.
Ref: http://notepad-plus-plus.org/features/multi-editing.html
Detect application heap size in Android
Do you mean programatically, or just while you're developing and debugging? If the latter, you can see that info from the DDMS perspective in Eclipse. When your emulator (possibly even physical phone that is plugged in) is running, it will list the active processes in a window on the left. You can select it and there's an option to track the heap allocations.
Redirect HTTP to HTTPS on default virtual host without ServerName
This is the complete way to omit unneeded redirects, too ;)
These rules are intended to be used in .htaccess files, as a RewriteRule in a *:80 VirtualHost entry needs no Conditions.
RewriteEngine on
RewriteCond %{HTTPS} off [OR]
RewriteCond %{HTTP:X-Forwarded-Proto} !https
RewriteRule ^/(.*) https://%{HTTP_HOST}/$1 [NC,R=301,L]
Eplanations:
RewriteEngine on
==> enable the engine at all
RewriteCond %{HTTPS} off [OR]
==> match on non-https connections, or (not setting [OR] would cause an implicit AND !)
RewriteCond %{HTTP:X-Forwarded-Proto} !https
==> match on forwarded connections (proxy, loadbalancer, etc.) without https
RewriteRule ^/(.*) https://%{HTTP_HOST}/$1 [NC,R=301,L]
==> if one of both Conditions match, do the rewrite of the whole URL, sending a 301 to have this 'learned' by the client (some do, some don't) and the L for the last rule.
How to count total lines changed by a specific author in a Git repository?
The question asked for information on a specific author, but many of the answers were solutions that returned ranked lists of authors based on their lines of code changed.
This was what I was looking for, but the existing solutions were not quite perfect. In the interest of people that may find this question via Google, I've made some improvements on them and made them into a shell script, which I display below.
There are no dependencies on either Perl or Ruby. Furthermore, whitespace, renames, and line movements are taken into account in the line change count. Just put this into a file and pass your Git repository as the first parameter.
#!/bin/bash
git --git-dir="$1/.git" log > /dev/null 2> /dev/null
if [ $? -eq 128 ]
then
echo "Not a git repository!"
exit 128
else
echo -e "Lines | Name\nChanged|"
git --work-tree="$1" --git-dir="$1/.git" ls-files -z |\
xargs -0n1 git --work-tree="$1" --git-dir="$1/.git" blame -C -M -w |\
cut -d'(' -f2 |\
cut -d2 -f1 |\
sed -e "s/ \{1,\}$//" |\
sort |\
uniq -c |\
sort -nr
fi
How to append binary data to a buffer in node.js
Buffers are always of fixed size, there is no built in way to resize them dynamically, so your approach of copying it to a larger Buffer is the only way.
However, to be more efficient, you could make the Buffer larger than the original contents, so it contains some "free" space where you can add data without reallocating the Buffer. That way you don't need to create a new Buffer and copy the contents on each append operation.
How to have PHP display errors? (I've added ini_set and error_reporting, but just gives 500 on errors)
To people using Codeigniter (i'm on C3):
The index.php file overwrite php.ini configuration, so on index.php file, line 68:
case 'development':
error_reporting(-1);
ini_set('display_errors', 1);
break;
You can change this option to set what you need. Here's the complete list:
1 E_ERROR
2 E_WARNING
4 E_PARSE
8 E_NOTICE
16 E_CORE_ERROR
32 E_CORE_WARNING
64 E_COMPILE_ERROR
128 E_COMPILE_WARNING
256 E_USER_ERROR
512 E_USER_WARNING
1024 E_USER_NOTICE
6143 E_ALL
2048 E_STRICT
4096 E_RECOVERABLE_ERROR
Hope it helps.
How can bcrypt have built-in salts?
I believe that phrase should have been worded as follows:
bcrypt has salts built into the generated hashes to prevent rainbow table attacks.
The bcrypt utility itself does not appear to maintain a list of salts. Rather, salts are generated randomly and appended to the output of the function so that they are remembered later on (according to the Java implementation of bcrypt). Put another way, the "hash" generated by bcrypt is not just the hash. Rather, it is the hash and the salt concatenated.
Compiling php with curl, where is curl installed?
If you're going to compile a 64bit version(x86_64) of php use: /usr/lib64/
For architectures (i386 ... i686) use /usr/lib/
I recommend compiling php to the same architecture as apache. As you're using a 64bit linux i asume your apache is also compiled for x86_64.
How to compare 2 dataTables
/// <summary>
/// https://stackoverflow.com/a/45620698/2390270
/// Compare a source and target datatables and return the row that are the same, different, added, and removed
/// </summary>
/// <param name="dtOld">DataTable to compare</param>
/// <param name="dtNew">DataTable to compare to dtOld</param>
/// <param name="dtSame">DataTable that would give you the common rows in both</param>
/// <param name="dtDifferences">DataTable that would give you the difference</param>
/// <param name="dtAdded">DataTable that would give you the rows added going from dtOld to dtNew</param>
/// <param name="dtRemoved">DataTable that would give you the rows removed going from dtOld to dtNew</param>
public static void GetTableDiff(DataTable dtOld, DataTable dtNew, ref DataTable dtSame, ref DataTable dtDifferences, ref DataTable dtAdded, ref DataTable dtRemoved)
{
try
{
dtAdded = dtOld.Clone();
dtAdded.Clear();
dtRemoved = dtOld.Clone();
dtRemoved.Clear();
dtSame = dtOld.Clone();
dtSame.Clear();
if (dtNew.Rows.Count > 0) dtDifferences.Merge(dtNew.AsEnumerable().Except(dtOld.AsEnumerable(), DataRowComparer.Default).CopyToDataTable<DataRow>());
if (dtOld.Rows.Count > 0) dtDifferences.Merge(dtOld.AsEnumerable().Except(dtNew.AsEnumerable(), DataRowComparer.Default).CopyToDataTable<DataRow>());
if (dtOld.Rows.Count > 0 && dtNew.Rows.Count > 0) dtSame = dtOld.AsEnumerable().Intersect(dtNew.AsEnumerable(), DataRowComparer.Default).CopyToDataTable<DataRow>();
foreach (DataRow row in dtDifferences.Rows)
{
if (dtOld.AsEnumerable().Any(r => Enumerable.SequenceEqual(r.ItemArray, row.ItemArray))
&& !dtNew.AsEnumerable().Any(r => Enumerable.SequenceEqual(r.ItemArray, row.ItemArray)))
{
dtRemoved.Rows.Add(row.ItemArray);
}
else if (dtNew.AsEnumerable().Any(r => Enumerable.SequenceEqual(r.ItemArray, row.ItemArray))
&& !dtOld.AsEnumerable().Any(r => Enumerable.SequenceEqual(r.ItemArray, row.ItemArray)))
{
dtAdded.Rows.Add(row.ItemArray);
}
}
}
catch (Exception ex)
{
Debug.WriteLine(ex.ToString());
}
}
JavaScript variable assignments from tuples
I made a tuple implementation that works quite well. This solution allows for array destructuring, as well as basic type-cheking.
const Tuple = (function() {
function Tuple() {
// Tuple needs at least one element
if (arguments.length < 1) {
throw new Error('Tuple needs at least one element');
}
const args = { ...arguments };
// Define a length property (equal to the number of arguments provided)
Object.defineProperty(this, 'length', {
value: arguments.length,
writable: false
});
// Assign values to enumerable properties
for (let i in args) {
Object.defineProperty(this, i, {
enumerable: true,
get() {
return args[+i];
},
// Checking if the type of the provided value matches that of the existing value
set(value) {
if (typeof value !== typeof args[+i]) {
throw new Error('Cannot assign ' + typeof value + ' on ' + typeof args[+i]);
}
args[+i] = value;
}
});
}
// Implementing iteration with Symbol.iterator (allows for array destructuring as well for...of loops)
this[Symbol.iterator] = function() {
const tuple = this;
return {
current: 0,
last: tuple.length - 1,
next() {
if (this.current <= this.last) {
let val = { done: false, value: tuple[this.current] };
this.current++;
return val;
} else {
return { done: true };
}
}
};
};
// Sealing the object to make sure no more values can be added to tuple
Object.seal(this);
}
// check if provided object is a tuple
Tuple.isTuple = function(obj) {
return obj instanceof Tuple;
};
// Misc. for making the tuple more readable when printing to the console
Tuple.prototype.toString = function() {
const copyThis = { ...this };
const values = Object.values(copyThis);
return `(${values.join(', ')})`;
};
// conctat two instances of Tuple
Tuple.concat = function(obj1, obj2) {
if (!Tuple.isTuple(obj1) || !Tuple.isTuple(obj2)) {
throw new Error('Cannot concat Tuple with ' + typeof (obj1 || obj2));
}
const obj1Copy = { ...obj1 };
const obj2Copy = { ...obj2 };
const obj1Items = Object.values(obj1Copy);
const obj2Items = Object.values(obj2Copy);
return new Tuple(...obj1Items, ...obj2Items);
};
return Tuple;
})();
const SNAKE_COLOR = new Tuple(0, 220, 10);
const [red, green, blue] = SNAKE_COLOR;
console.log(green); // => 220
How to add Python to Windows registry
I had the same issue while trying to install bots on a Windows Server. Took me a while to find a solution, but this is what worked for me:
- Open Command Prompt as Administrator
- Copy this:
reg add HKLM\SOFTWARE\Python\PythonCore\2.7\InstallPath /ve /t REG_SZ /d "C:\Python27" /f and tailor for your specifications.
- Right click and paste the tailored version into Command Prompt and hit Enter!
Anyway, I hope that this can help someone in the future.
Nesting optgroups in a dropdownlist/select
I needed clean and lightweight solution (so no jQuery and alike), which will look exactly like plain HTML, would also continue working when only plain HTML is preset (so javascript will only enhance it), and which will allow searching by starting letters (including national UTF-8 letters) if possible where it does not add extra weight. It also must work fast on very slow browsers (think rPi - so preferably no javascript executing after page load).
In firefox it uses CSS identing and thus allow searching by letters, and in other browsers it will use prepending (but there it does not support quick search by letters). Anyway, I'm quite happy with results.
You can try it in action here
It goes like this:
CSS:
.i0 { }
.i1 { margin-left: 1em; }
.i2 { margin-left: 2em; }
.i3 { margin-left: 3em; }
.i4 { margin-left: 4em; }
.i5 { margin-left: 5em; }
HTML (class "i1", "i2" etc denote identation level):
<form action="/filter/" method="get">
<select name="gdje" id="gdje">
<option value=1 class="i0">Svugdje</option>
<option value=177 class="i1">Bosna i Hercegovina</option>
<option value=190 class="i2">Babin Do</option>
<option value=258 class="i2">Banja Luka</option>
<option value=181 class="i2">Tuzla</option>
<option value=307 class="i1">Crna Gora</option>
<option value=308 class="i2">Podgorica</option>
<option value=2 SELECTED class="i1">Hrvatska</option>
<option value=5 class="i2">Bjelovarsko-bilogorska županija</option>
<option value=147 class="i3">Bjelovar</option>
<option value=79 class="i3">Daruvar</option>
<option value=94 class="i3">Garešnica</option>
<option value=329 class="i3">Grubišno Polje</option>
<option value=368 class="i3">Cazma</option>
<option value=6 class="i2">Brodsko-posavska županija</option>
<option value=342 class="i3">Gornji Bogicevci</option>
<option value=158 class="i3">Klakar</option>
<option value=140 class="i3">Nova Gradiška</option>
</select>
</form>
<script>
<!--
window.onload = loadFilter;
// -->
</script>
JavaScript:
function loadFilter() {
'use strict';
// indents all options depending on "i" CSS class
function add_nbsp() {
var opt = document.getElementsByTagName("option");
for (var i = 0; i < opt.length; i++) {
if (opt[i].className[0] === 'i') {
opt[i].innerHTML = Array(3*opt[i].className[1]+1).join(" ") + opt[i].innerHTML; // this means " " x (3*$indent)
}
}
}
// detects browser
navigator.sayswho= (function() {
var ua= navigator.userAgent, tem,
M= ua.match(/(opera|chrome|safari|firefox|msie|trident(?=\/))\/?\s*([\d\.]+)/i) || [];
if(/trident/i.test(M[1])){
tem= /\brv[ :]+(\d+(\.\d+)?)/g.exec(ua) || [];
return 'IE '+(tem[1] || '');
}
M= M[2]? [M[1], M[2]]:[navigator.appName, navigator.appVersion, '-?'];
if((tem= ua.match(/version\/([\.\d]+)/i))!= null) M[2]= tem[1];
return M.join(' ');
})();
// quick detection if browser is firefox
function isFirefox() {
var ua= navigator.userAgent,
M= ua.match(/firefox\//i);
return M;
}
// indented select options support for non-firefox browsers
if (!isFirefox()) {
add_nbsp();
}
}
Difference between Visual Basic 6.0 and VBA
VB (Visual Basic only up to 6.0) is a superset of VBA (Visual Basic for Applications). I know that others have sort of eluded to this but my understanding is that the semantics (i.e. the vocabulary) of VBA is included in VB6 (except for objects specific to Office products), therefore, VBA is a subset of VB6. The syntax (i.e. the order in which the words are written) is exactly the same in VBA as it would be in VB6, but the difference is the objects available to VBA or VB6 are different because they have different purposes. Specifically VBA's purpose is to programatically automate tasks that can be done in MS Office, whereas VB6's purpose is to create standard EXE, ActiveX Controls, ActiveX DLLs and ActiveX EXEs which can either work stand alone or in other programs such as MS Office or Windows.
C# Convert List<string> to Dictionary<string, string>
EDIT
another way to deal with duplicate is you can do like this
var dic = slist.Select((element, index)=> new{element,index} )
.ToDictionary(ele=>ele.index.ToString(), ele=>ele.element);
or
easy way to do is
var res = list.ToDictionary(str => str, str=> str);
but make sure that there is no string is repeating...again otherewise above code will not work for you
if there is string is repeating than its better to do like this
Dictionary<string,string> dic= new Dictionary<string,string> ();
foreach(string s in Stringlist)
{
if(!dic.ContainsKey(s))
{
// dic.Add( value to dictionary
}
}
Adding rows dynamically with jQuery
I have Tried something like this and its works fine;
this is the html part :
<table class="dd" width="100%" id="data">
<tr>
<td>Year</td>
<td>:</td>
<td><select name="year1" id="year1" >
<option value="2012">2012</option>
<option value="2011">2011</option>
</select></td>
<td>Month</td>
<td>:</td>
<td width="17%"><select name="month1" id="month1">
<option value="1">January</option>
<option value="2">February</option>
<option value="3">March</option>
<option value="4">April</option>
<option value="5">May</option>
<option value="6">June</option>
<option value="7">July</option>
<option value="8">August</option>
<option value="9">September</option>
<option value="10">October</option>
<option value="11">November</option>
<option value="12">December</option>
</select></td>
<td width="7%">Week</td>
<td width="3%">:</td>
<td width="17%"><select name="week1" id="week1" >
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
<option value="4">4</option>
</select></td>
<td width="8%"> </td>
<td colspan="2"> </td>
</tr>
<tr>
<td>Actual</td>
<td>:</td>
<td width="17%"><input name="actual1" id="actual1" type="text" /></td>
<td width="7%">Max</td>
<td width="3%">:</td>
<td><input name="max1" id="max1" type="text" /></td>
<td>Target</td>
<td>:</td>
<td><input name="target1" id="target1" type="text" /></td>
</tr>
this is Javascript part;
<script src="http://code.jquery.com/jquery-latest.js"></script>
<script type='text/javascript'>
//<![CDATA[
$(document).ready(function() {
var currentItem = 1;
$('#addnew').click(function(){
currentItem++;
$('#items').val(currentItem);
var strToAdd = '<tr><td>Year</td><td>:</td><td><select name="year'+currentItem+'" id="year'+currentItem+'" ><option value="2012">2012</option><option value="2011">2011</option></select></td><td>Month</td><td>:</td><td width="17%"><select name="month'+currentItem+'" id="month'+currentItem+'"><option value="1">January</option><option value="2">February</option><option value="3">March</option><option value="4">April</option><option value="5">May</option><option value="6">June</option><option value="7">July</option><option value="8">August</option><option value="9">September</option><option value="10">October</option><option value="11">November</option><option value="12">December</option></select></td><td width="7%">Week</td><td width="3%">:</td><td width="17%"><select name="week'+currentItem+'" id="week'+currentItem+'" ><option value="1">1</option><option value="2">2</option><option value="3">3</option><option value="4">4</option></select></td><td width="8%"></td><td colspan="2"></td></tr><tr><td>Actual</td><td>:</td><td width="17%"><input name="actual'+currentItem+'" id="actual'+currentItem+'" type="text" /></td><td width="7%">Max</td> <td width="3%">:</td><td><input name="max'+currentItem+'" id ="max'+currentItem+'"type="text" /></td><td>Target</td><td>:</td><td><input name="target'+currentItem+'" id="target'+currentItem+'" type="text" /></td></tr>';
$('#data').append(strToAdd);
});
});
//]]>
</script>
Finaly PHP submit part:
for( $i = 1; $i <= $count; $i++ )
{
$year = $_POST['year'.$i];
$month = $_POST['month'.$i];
$week = $_POST['week'.$i];
$actual = $_POST['actual'.$i];
$max = $_POST['max'.$i];
$target = $_POST['target'.$i];
$extreme = $_POST['extreme'.$i];
$que = "insert INTO table_name(id,year,month,week,actual,max,target) VALUES ('".$_POST['type']."','".$year."','".$month."','".$week."','".$actual."','".$max."','".$target."')";
mysql_query($que);
}
you can find more details via Dynamic table row inserter
Find duplicate values in R
Here, I summarize a few ways which may return different results to your question, so be careful:
# First assign your "id"s to an R object.
# Here's a hypothetical example:
id <- c("a","b","b","c","c","c","d","d","d","d")
#To return ALL MINUS ONE duplicated values:
id[duplicated(id)]
## [1] "b" "c" "c" "d" "d" "d"
#To return ALL duplicated values by specifying fromLast argument:
id[duplicated(id) | duplicated(id, fromLast=TRUE)]
## [1] "b" "b" "c" "c" "c" "d" "d" "d" "d"
#Yet another way to return ALL duplicated values, using %in% operator:
id[ id %in% id[duplicated(id)] ]
## [1] "b" "b" "c" "c" "c" "d" "d" "d" "d"
Hope these help. Good luck.
Count number of vector values in range with R
There are also the %<% and %<=% comparison operators in the TeachingDemos package which allow you to do this like:
sum( 2 %<% x %<% 5 )
sum( 2 %<=% x %<=% 5 )
which gives the same results as:
sum( 2 < x & x < 5 )
sum( 2 <= x & x <= 5 )
Which is better is probably more a matter of personal preference.
How to loop through each and every row, column and cells in a GridView and get its value
The easiest would be using a foreach:
foreach(GridViewRow row in GridView2.Rows)
{
// here you'll get all rows with RowType=DataRow
// others like Header are omitted in a foreach
}
Edit: According to your edits, you are accessing the column incorrectly, you should start with 0:
foreach(GridViewRow row in GridView2.Rows)
{
for(int i = 0; i < GridView2.Columns.Count; i++)
{
String header = GridView2.Columns[i].HeaderText;
String cellText = row.Cells[i].Text;
}
}
Android Studio - Gradle sync project failed
Each version of the Android Gradle Plugin now has a default version of the build tools. For the best performance, you should use the latest possible version of both Gradle and the plugin.
You recive this warning in case if you use latest gradle plugin but not use latest SDK version. For example for Gradle plugin 3.2.0 (September 2018) you requires Gradle 4.6 or higher and SDK Build Tools 28.0.3 or higher.
Although you typically don't need to specify the build tools version, when using Android Gradle plugin 3.2.0 with renderscriptSupportModeEnabled set to true, you need to include the following in each module's build.gradle file: android.buildToolsVersion "28.0.3"
see more https://developer.android.com/studio/releases/gradle-plugin
Calculating width from percent to pixel then minus by pixel in LESS CSS
You can escape the calc arguments in order to prevent them from being evaluated on compilation.
Using your example, you would simply surround the arguments, like this:
calc(~'100% - 10px')
Demo : http://jsfiddle.net/c5aq20b6/
I find that I use this in one of the following three ways:
Basic Escaping
Everything inside the calc arguments is defined as a string, and is totally static until it's evaluated by the client:
LESS Input
div {
> span {
width: calc(~'100% - 10px');
}
}
CSS Output
div > span {
width: calc(100% - 10px);
}
Interpolation of Variables
You can insert a LESS variable into the string:
LESS Input
div {
> span {
@pad: 10px;
width: calc(~'100% - @{pad}');
}
}
CSS Output
div > span {
width: calc(100% - 10px);
}
Mixing Escaped and Compiled Values
You may want to escape a percentage value, but go ahead and evaluate something on compilation:
LESS Input
@btnWidth: 40px;
div {
> span {
@pad: 10px;
width: calc(~'(100% - @{pad})' - (@btnWidth * 2));
}
}
CSS Output
div > span {
width: calc((100% - 10px) - 80px);
}
Source: http://lesscss.org/functions/#string-functions-escape.
Python Prime number checker
After you determine that a number is composite (not prime), your work is done. You can exit the loop with break.
while num > a :
if num%a==0 & a!=num:
print('not prime')
break # not going to update a, going to quit instead
else:
print('prime')
a=(num)+1
Also, you might try and become more familiar with some constructs in Python. Your loop can be shortened to a one-liner that still reads well in my opinion.
any(num % a == 0 for a in range(2, num))
angularjs directive call function specified in attribute and pass an argument to it
Here's what worked for me.
Html using the directive
<tr orderitemdirective remove="vm.removeOrderItem(orderItem)" order-item="orderitem"></tr>
Html of the directive: orderitem.directive.html
<md-button type="submit" ng-click="remove({orderItem:orderItem})">
(...)
</md-button>
Directive's scope:
scope: {
orderItem: '=',
remove: "&",
Should you choose the MONEY or DECIMAL(x,y) datatypes in SQL Server?
Never ever should you use money. It is not precise, and it is pure garbage; always use decimal/numeric.
Run this to see what I mean:
DECLARE
@mon1 MONEY,
@mon2 MONEY,
@mon3 MONEY,
@mon4 MONEY,
@num1 DECIMAL(19,4),
@num2 DECIMAL(19,4),
@num3 DECIMAL(19,4),
@num4 DECIMAL(19,4)
SELECT
@mon1 = 100, @mon2 = 339, @mon3 = 10000,
@num1 = 100, @num2 = 339, @num3 = 10000
SET @mon4 = @mon1/@mon2*@mon3
SET @num4 = @num1/@num2*@num3
SELECT @mon4 AS moneyresult,
@num4 AS numericresult
Output: 2949.0000 2949.8525
To some of the people who said that you don't divide money by money:
Here is one of my queries to calculate correlations, and changing that to money gives wrong results.
select t1.index_id,t2.index_id,(avg(t1.monret*t2.monret)
-(avg(t1.monret) * avg(t2.monret)))
/((sqrt(avg(square(t1.monret)) - square(avg(t1.monret))))
*(sqrt(avg(square(t2.monret)) - square(avg(t2.monret))))),
current_timestamp,@MaxDate
from Table1 t1 join Table1 t2 on t1.Date = traDate
group by t1.index_id,t2.index_id
Connection attempt failed with "ECONNREFUSED - Connection refused by server"
For me, I was receiving this error when connecting to the new IP Address I had configured FileZilla to bind to and saved the configuration. After trying all of the other answers unsuccessfully, I decided to connect to the old IP Address to see what came up; lo and behold it responded.
I restarted the FileZilla Windows Service and it immediately came back listening on the correct IP. Pretty elementary, but it cost me some time today as a noob to FZ.
Hopefully this helps someone out in the same predicament.
Use a.any() or a.all()
If you take a look at the result of valeur <= 0.6, you can see what’s causing this ambiguity:
>>> valeur <= 0.6
array([ True, False, False, False], dtype=bool)
So the result is another array that has in this case 4 boolean values. Now what should the result be? Should the condition be true when one value is true? Should the condition be true only when all values are true?
That’s exactly what numpy.any and numpy.all do. The former requires at least one true value, the latter requires that all values are true:
>>> np.any(valeur <= 0.6)
True
>>> np.all(valeur <= 0.6)
False
How do I remove duplicates from a C# array?
NOTE : NOT tested!
string[] test(string[] myStringArray)
{
List<String> myStringList = new List<string>();
foreach (string s in myStringArray)
{
if (!myStringList.Contains(s))
{
myStringList.Add(s);
}
}
return myStringList.ToString();
}
Might do what you need...
EDIT Argh!!! beaten to it by rob by under a minute!
Shell Script: Execute a python program from within a shell script
This works for me:
Create a new shell file job. So let's say:
touch job.sh and add command to run python script (you can even add command line arguments to that python, I usually predefine my command line arguments).
chmod +x job.sh
Inside job.sh add the following py files, let's say:
python_file.py argument1 argument2 argument3 >> testpy-output.txt && echo "Done with python_file.py"
python_file1.py argument1 argument2 argument3 >> testpy-output.txt && echo "Done with python_file1.py"
Output of job.sh should look like this:
Done with python_file.py
Done with python_file1.py
I use this usually when I have to run multiple python files with different arguments, pre defined.
Note: Just a quick heads up on what's going on here:
python_file.py argument1 argument2 argument3 >> testpy-output.txt && echo "completed with python_file.py" .
- Here shell script will run the file python_file.py and add multiple command-line arguments at run time to the python file.
- This does not necessarily means, you have to pass command line arguments as well.
- You can just use it like:
python python_file.py, plain and simple.
Next up, the >> will print and store the output of this .py file in the testpy-output.txt file.
- && is a logical operator that will run only after the above is executed successfully and as an optional echo "completed with python_file.py" will be echoed on to your cli/terminal at run time.
PHPExcel Make first row bold
$objPHPExcel->getActiveSheet()->getStyle('1:1')->getFont()->setBold(true);
That way you get the complete first row
Add a border outside of a UIView (instead of inside)
I liked solution of @picciano & @Maksim Kniazev. We can also create annular border with following:
func addExternalAnnularBorder(borderWidth: CGFloat = 2.0, borderColor: UIColor = UIColor.white) {
let externalBorder = CALayer()
externalBorder.frame = CGRect(x: -borderWidth*2, y: -borderWidth*2, width: frame.size.width + 4 * borderWidth, height: frame.size.height + 4 * borderWidth)
externalBorder.borderColor = borderColor.cgColor
externalBorder.borderWidth = borderWidth
externalBorder.cornerRadius = (frame.size.width + 4 * borderWidth) / 2
externalBorder.name = Constants.ExternalBorderName
layer.insertSublayer(externalBorder, at: 0)
layer.masksToBounds = false
}
What is href="#" and why is it used?
About hyperlinks:
The main use of anchor tags - <a></a> - is as hyperlinks. That basically means that they take you somewhere. Hyperlinks require the href property, because it specifies a location.
Hash:
A hash - # within a hyperlink specifies an html element id to which the window should be scrolled.
href="#some-id" would scroll to an element on the current page such as <div id="some-id">.
href="//site.com/#some-id" would go to site.com and scroll to the id on that page.
Scroll to Top:
href="#" doesn't specify an id name, but does have a corresponding location - the top of the page. Clicking an anchor with href="#" will move the scroll position to the top.
See this demo.
This is the expected behavior according to the w3 documentation.
Hyperlink placeholders:
An example where a hyperlink placeholder makes sense is within template previews. On single page demos for templates, I have often seen <a href="#"> so that the anchor tag is a hyperlink, but doesn't go anywhere. Why not leave the href property blank? A blank href property is actually a hyperlink to the current page. In other words, it will cause a page refresh. As I discussed, href="#" is also a hyperlink, and causes scrolling. Therefore, the best solution for hyperlink placeholders is actually href="#!" The idea here is that there hopefully isn't an element on the page with id="!" (who does that!?) and the hyperlink therefore refers to nothing - so nothing happens.
About anchor tags:
Another question that you may be wondering is, "Why not just leave the href property off?". A common response I've heard is that the href property is required, so it "should" be present on anchors. This is FALSE! The href property is required only for an anchor to actually be a hyperlink! Read this from w3. So, why not just leave it off for placeholders? Browsers render default styles for elements and will change the default style of an anchor tag that doesn't have the href property. Instead, it will be considered like regular text. It even changes the browser's behavior regarding the element. The status bar (bottom of the screen) will not be displayed when hovering on an anchor without the href property. It is best to use a placeholder href value on an anchor to ensure it is treated as a hyperlink.
See this demo demonstrating style and behavior differences.
How do I use T-SQL's Case/When?
As soon as a WHEN statement is true the break is implicit.
You will have to concider which WHEN Expression is the most likely to happen. If you put that WHEN at the end of a long list of WHEN statements, your sql is likely to be slower. So put it up front as the first.
More information here: break in case statement in T-SQL
Make anchor link go some pixels above where it's linked to
Even better solution:
<p style="position:relative;">
<a name="anchor" style="position:absolute; top:-100px;"></a>
I should be 100px below where I currently am!
</p>
Just position the <a> tag with absolute positioning inside of a relatively positioned object.
Works when entering the page or through a hash change within page.
How to test abstract class in Java with JUnit?
I would create a jUnit inner class that inherits from the abstract class. This can be instantiated and have access to all the methods defined in the abstract class.
public class AbstractClassTest {
public void testMethod() {
...
}
}
class ConcreteClass extends AbstractClass {
}
Count multiple columns with group by in one query
One solution is to wrap it in a subquery
SELECT *
FROM
(
SELECT COUNT(column1),column1 FROM table GROUP BY column1
UNION ALL
SELECT COUNT(column2),column2 FROM table GROUP BY column2
UNION ALL
SELECT COUNT(column3),column3 FROM table GROUP BY column3
) s
Regex to validate date format dd/mm/yyyy
((((0[13578]|1[02])\/(0[1-9]|1[0-9]|2[0-9]|3[01]))|((0[469]|11)\/(0[1-9]|1[0-9]|2[0-9]|3[0]))|((02)(\/(0[1-9]|1[0-9]|2[0-8]))))\/(19([6-9][0-9])|20([0-9][0-9])))|((02)\/(29)\/(19(6[048]|7[26]|8[048]|9[26])|20(0[048]|1[26]|2[048])))
will validate MM/DD/YYYY format with 1960 to 2028
if you need to extend leap year support then add
19(6[048]|7[26]|8[048]|9[26])|20(0[048]|1[26]|2[048]|3[26]|4[048])))
this is also work
^((((0[13578]|1[02])[/](0[1-9]|1[0-9]|2[0-9]|3[01]))|((0[469]|11)[/](0[1-9]|1[0-9]|2[0-9]|3[0]))|((02)([/](0[1-9]|1[0-9]|2[0-8]))))[/](19([6-9][0-9])|20([0-9][0-9])))|((02)[/](29)[/](19(6[048]|7[26]|8[048]|9[26])|20(0[048]|1[26]|2[048])))
if you can change format mm-dd-yyyy than replace [/] to [-]
also check online http://regexr.com/
JS: Failed to execute 'getComputedStyle' on 'Window': parameter is not of type 'Element'
I had the same error on my Angular6 project. none of those solutions seemed to work out for me. turned out that the problem was due to an element which was specified as dropdown but it didn't have dropdown options in it. take a look at code below:
<span class="nav-link" id="navbarDropdownMenuLink" data-toggle="dropdown"
aria-haspopup="true" aria-expanded="false">
<i class="material-icons "
style="font-size: 2rem">notifications</i>
<span class="notification"></span>
<p>
<span class="d-lg-none d-md-block">Some Actions</span>
</p>
</span>
<div class="dropdown-menu dropdown-menu-left"
*ngIf="global.localStorageItem('isInSadHich')"
aria-labelledby="navbarDropdownMenuLink">
<a class="dropdown-item" href="#">You have 5 new tasks</a>
<a class="dropdown-item" href="#">You're now friend with Andrew</a>
<a class="dropdown-item" href="#">Another Notification</a>
<a class="dropdown-item" href="#">Another One</a>
</div>
removing the code data-toggle="dropdown" aria-haspopup="true" aria-expanded="false" solved the problem.
I myself think that by each click on the first span element, the scope expected to set style for dropdown children which did not existed in the parent span, so it threw error.
ElasticSearch: Unassigned Shards, how to fix?
I was having this issue as well, and I found an easy way to resolve it.
Get the index of unassigned shards
$ curl -XGET http://172.16.4.140:9200/_cat/shards
Install curator Tools, and use it to delete index
$ curator --host 172.16.4.140 delete indices --older-than 1 \
--timestring '%Y.%m.%d' --time-unit days --prefix logstash
NOTE: In my case, the index is logstash of the day 2016-04-21
- Then check the shards again, all the unassigned shards go away!
Closing Twitter Bootstrap Modal From Angular Controller
Here's a reusable Angular directive that will hide and show a Bootstrap modal.
app.directive("modalShow", function () {
return {
restrict: "A",
scope: {
modalVisible: "="
},
link: function (scope, element, attrs) {
//Hide or show the modal
scope.showModal = function (visible) {
if (visible)
{
element.modal("show");
}
else
{
element.modal("hide");
}
}
//Check to see if the modal-visible attribute exists
if (!attrs.modalVisible)
{
//The attribute isn't defined, show the modal by default
scope.showModal(true);
}
else
{
//Watch for changes to the modal-visible attribute
scope.$watch("modalVisible", function (newValue, oldValue) {
scope.showModal(newValue);
});
//Update the visible value when the dialog is closed through UI actions (Ok, cancel, etc.)
element.bind("hide.bs.modal", function () {
scope.modalVisible = false;
if (!scope.$$phase && !scope.$root.$$phase)
scope.$apply();
});
}
}
};
});
Usage Example #1 - this assumes you want to show the modal - you could add ng-if as a condition
<div modal-show class="modal fade"> ...bootstrap modal... </div>
Usage Example #2 - this uses an Angular expression in the modal-visible attribute
<div modal-show modal-visible="showDialog" class="modal fade"> ...bootstrap modal... </div>
Another Example - to demo the controller interaction, you could add something like this to your controller and it will show the modal after 2 seconds and then hide it after 5 seconds.
$scope.showDialog = false;
$timeout(function () { $scope.showDialog = true; }, 2000)
$timeout(function () { $scope.showDialog = false; }, 5000)
I'm late to contribute to this question - created this directive for another question here. Simple Angular Directive for Bootstrap Modal
Hope this helps.
