The BrightCloud web service API is perfect for this. It's a REST API for doing website lookups just like this. It contains a very large and very accurate web filtering DB and one of the categories, Adult, has over 10M porn sites identified!
Disabling and Enabling All Foreign Keys
CREATE PROCEDURE pr_Disable_Triggers_v2
@disable BIT = 1
AS
DECLARE @sql VARCHAR(500)
, @tableName VARCHAR(128)
, @tableSchema VARCHAR(128)
-- List of all tables
DECLARE triggerCursor CURSOR FOR
SELECT t.TABLE_NAME AS TableName
, t.TABLE_SCHEMA AS TableSchema
FROM INFORMATION_SCHEMA.TABLES t
ORDER BY t.TABLE_NAME, t.TABLE_SCHEMA
OPEN triggerCursor
FETCH NEXT FROM triggerCursor INTO @tableName, @tableSchema
WHILE ( @@FETCH_STATUS = 0 )
BEGIN
SET @sql = 'ALTER TABLE ' + @tableSchema + '.[' + @tableName + '] '
IF @disable = 1
SET @sql = @sql + ' DISABLE TRIGGER ALL'
ELSE
SET @sql = @sql + ' ENABLE TRIGGER ALL'
PRINT 'Executing Statement - ' + @sql
EXECUTE ( @sql )
FETCH NEXT FROM triggerCursor INTO @tableName, @tableSchema
END
CLOSE triggerCursor
DEALLOCATE triggerCursor
First, the foreignKeyCursor cursor is declared as the SELECT statement that gathers the list of foreign keys and their table names. Next, the cursor is opened and the initial FETCH statement is executed. This FETCH statement will read the first row's data into the local variables @foreignKeyName and @tableName. When looping through a cursor, you can check the @@FETCH_STATUS for a value of 0, which indicates that the fetch was successful. This means the loop will continue to move forward so it can get each successive foreign key from the rowset. @@FETCH_STATUS is available to all cursors on the connection. So if you are looping through multiple cursors, it is important to check the value of @@FETCH_STATUS in the statement immediately following the FETCH statement. @@FETCH_STATUS will reflect the status for the most recent FETCH operation on the connection. Valid values for @@FETCH_STATUS are:
0 = FETCH was successful
-1 = FETCH was unsuccessful
-2 = the row that was fetched is missingInside the loop, the code builds the ALTER TABLE command differently depending on whether the intention is to disable or enable the foreign key constraint (using the CHECK or NOCHECK keyword). The statement is then printed as a message so its progress can be observed and then the statement is executed. Finally, when all rows have been iterated through, the stored procedure closes and deallocates the cursor.
As per https://msdn.microsoft.com/en-us/library/ms180065.aspx, "DBCC USEROPTIONS reports an isolation level of 'read committed snapshot' when the database option READ_COMMITTED_SNAPSHOT is set to ON and the transaction isolation level is set to 'read committed'. The actual isolation level is read committed."
Also in SQL Server Management Studio, in database properties under Options->Miscellaneous there is "Is Read Committed Snapshot On" option status
Look for "poi-3.17.jar"!!!
Problem solved and errors disappeared.
One thing that should be considered is licensing.
Notepad++ is free (as in speech and as in beer) for perpetual use, released under the GPL license, whereas Sublime Text 2 requires a license.
To quote the Sublime Text 2 website:
..a license must be purchased for continued use. There is currently no enforced time limit for the evaluation.
The same is now true of Sublime Text 3, and a paid upgrade will be needed for future versions.
Upgrade Policy A license is valid for Sublime Text 3, and includes all point updates, as well as access to prior versions (e.g., Sublime Text 2). Future major versions, such as Sublime Text 4, will be a paid upgrade.
This licensing requirement is still correct as of Dec 2019.
Supplement for doing so with matplotlib. I found it handy doing computer vision tasks. Let's say you got data with dtype = int32
from matplotlib import pyplot as plot
import numpy as np
fig = plot.figure()
ax = fig.add_subplot(1, 1, 1)
# make sure your data is in H W C, otherwise you can change it by
# data = data.transpose((_, _, _))
data = np.zeros((512,512,3), dtype=np.int32)
data[256,256] = [255,0,0]
ax.imshow(data.astype(np.uint8))
InetAddress.isReachable
sometime return false if internet connection exist.
An alternative method to check internet availability in java is : This function make a real ICMP ECHO
ping.
public static boolean isReachableByPing(String host) {
try{
String cmd = "";
if(System.getProperty("os.name").startsWith("Windows")) {
// For Windows
cmd = "ping -n 1 " + host;
} else {
// For Linux and OSX
cmd = "ping -c 1 " + host;
}
Process myProcess = Runtime.getRuntime().exec(cmd);
myProcess.waitFor();
if(myProcess.exitValue() == 0) {
return true;
} else {
return false;
}
} catch( Exception e ) {
e.printStackTrace();
return false;
}
}
You are calling DoDownloadAsync() but you don't wait it. So your program going to the next line. But there is another problem, Async methods should return Task
or Task<T>
, if you return nothing and you want your method will be run asyncronously you should define your method like this:
private static async Task DoDownloadAsync() { WebClient w = new WebClient(); string txt = await w.DownloadStringTaskAsync("http://www.google.com/"); Debug.WriteLine(txt); }
And in Main method you can't await for DoDownloadAsync
, because you can't use await keyword in non-async function, and you can't make Main
async. So consider this:
var result = DoDownloadAsync(); Debug.WriteLine("DoDownload done"); result.Wait();
Use the same XML file format from Evan's answer, but one drawable file is all you need for formatting.
<RadioButton
android:id="@+id/radio0"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/custom_button_background"
android:button="@android:color/transparent"
android:checked="true"
android:text="RadioButton1" />
And your separate drawable file:
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android" >
<item android:state_pressed="true" >
<shape android:shape="rectangle" >
<corners android:radius="3dip" />
<stroke android:width="1dip" android:color="#333333" />
<solid android:color="#cccccc" />
</shape>
</item>
<item android:state_checked="true">
<shape android:shape="rectangle" >
<corners android:radius="3dip" />
<stroke android:width="1dip" android:color="#333333" />
<solid android:color="#cccccc" />
</shape>
</item>
<item>
<shape android:shape="rectangle" >
<corners android:radius="3dip" />
<stroke android:width="1dip" android:color="#cccccc" />
<solid android:color="#ffffff" />
</shape>
</item>
</selector>
Excel has a little known feature called "Web queries" which let you retrieve data from almost every web page without additional programming.
A web query basicly runs a HTTP request directly from within Excel and copies some or all of the received data (and optionally formatting) into the worksheet.
After you've defined the web query you can refresh it at any time without even leaving excel. So you don't have to actually "export" data and save it to a file - you'd rather refresh the data just like from a database.
You can even make use of URL parameters by having excel prompt you for certain filter criteria etc...
However the cons I've noticed so far are:
Here is a question about how to create web queries in Excel. It links to a Microsoft Help site about How-To Get external data from a Web page
This property exists : TreeView.SelectedItem
But it is readonly, so you cannot assign it through a binding, only retrieve it
According to the GF Administration Guide:
For a valid JVM installation, locations are checked in the following order: a. domain.xml (java-home inside java-config) b. asenv.conf (setting AS_JAVA="path to java home")
I had to add both these settings to make it work. Otherwise 'asadmin stop-domain domain1' wouldn't work. I guess that GF uses a. and asadmin uses b.
(On Windows: b. asenv.bat)
you can just simply using the oninvalid=" attribute, with the bingding the this.setCustomValidity() eventListener!
Here is my demo codes!(you can run it to check out!)
<!DOCTYPE html>_x000D_
<html lang="en">_x000D_
<head>_x000D_
<meta charset="UTF-8">_x000D_
<title>oninvalid</title>_x000D_
</head>_x000D_
<body>_x000D_
<form action="https://www.google.com.hk/webhp?#safe=strict&q=" method="post" >_x000D_
<input type="email" placeholder="[email protected]" required="" autocomplete="" autofocus="" oninvalid="this.setCustomValidity(`This is a customlised invalid warning info!`)">_x000D_
<input type="submit" value="Submit">_x000D_
</form>_x000D_
</body>_x000D_
</html>
_x000D_
http://caniuse.com/#feat=form-validation
https://www.w3.org/TR/html51/sec-forms.html#sec-constraint-validation
Summary: the C++ Standard could specify a notation and behaviour for "virtual constructor"s that's reasonably intuitive and not too hard for compilers to support, but why make a Standard change for this specifically when the functionality can already be cleanly implemented using create()
/ clone()
(see below)? It's not nearly as useful as many other language proposal in the pipeline.
Let's postulate a "virtual constructor" mechanism:
Base* p = new Derived(...);
Base* p2 = new p->Base(); // possible syntax???
In the above, the first line constructs a Derived
object, so *p
's virtual dispatch table can reasonably supply a "virtual constructor" for use in the second line. (Dozens of answers on this page stating "the object doesn't yet exist so virtual construction is impossible" are unnecessarily myopically focused on the to-be-constructed object.)
The second line postulates the notation new p->Base()
to request dynamic allocation and default construction of another Derived
object.
Notes:
the compiler must orchestrate memory allocation before calling the constructor - constructors normally support automatic (informally "stack") allocation, static (for global/namespace scope and class-/function-static
objects), and dynamic (informally "heap") when new
is used
the size of object to be constructed by p->Base()
can't generally be known at compile-time, so dynamic allocation is the only approach that makes sense
alloca()
- but leads to significant inefficiencies and complexities (e.g. here and here respectively)for dynamic allocation it must return a pointer so memory can be delete
d later.
the postulated notation explicitly lists new
to emphasise dynamic allocation and the pointer result type.
The compiler would need to:
Derived
needed, either by calling an implicit virtual
sizeof
function or having such information available via RTTIoperator new(size_t)
to allocate memoryDerived()
with placement new
.OR
So - it doesn't seem insurmountable to specify and implement virtual constructors, but the million-dollar question is: how would it be better than what's possible using existing C++ language features...? Personally, I see no benefit over the solution below.
The C++ FAQ documents a "virtual constructor" idiom, containing virtual
create()
and clone()
methods to default-construct or copy-construct a new dynamically-allocated object:
class Shape {
public:
virtual ~Shape() { } // A virtual destructor
virtual void draw() = 0; // A pure virtual function
virtual void move() = 0;
// ...
virtual Shape* clone() const = 0; // Uses the copy constructor
virtual Shape* create() const = 0; // Uses the default constructor
};
class Circle : public Shape {
public:
Circle* clone() const; // Covariant Return Types; see below
Circle* create() const; // Covariant Return Types; see below
// ...
};
Circle* Circle::clone() const { return new Circle(*this); }
Circle* Circle::create() const { return new Circle(); }
It's also possible to change or overload create()
to accept arguments, though to match the base class / interface's virtual
function signature, arguments to overrides must exactly match one of the base class overloads. With these explicit user-provided facilities, it's easy to add logging, instrumentation, alter memory allocation etc..
var mydate = "2017-06-28T00:00:00";
var weekDayName = moment(mydate).format('ddd');
console.log(weekDayName);
Result: Wed
var mydate = "2017-06-28T00:00:00";
var weekDayName = moment(mydate).format('dddd');
console.log(weekDayName);
Result: Wednesday
You can use either TASKSCHD.MSC
or CONTROL SCHEDTASKS
Here are some more such commands.
Another option of course is to use Javascript (Jquery here):
$('.box1,.box2').each(function(){
$(this).height($(this).parent().height());
})
You have two typing errors in your code:
struct timeval,
should be
struct timeval
and after the printf()
parenthesis you need a semicolon.
Also, depending on the compiler, so simple a cycle might just be optimized out, giving you a time of 0 microseconds whatever you do.
Finally, the time calculation is wrong. You only take into accounts the seconds, ignoring the microseconds. You need to get the difference between seconds, multiply by one million, then add "after" tv_usec
and subtract "before" tv_usec
. You gain nothing by casting an integer number of seconds to a float.
I'd suggest checking out the man page for struct timeval
.
This is the code:
#include <stdio.h>
#include <sys/time.h>
int main (int argc, char** argv) {
struct timeval tvalBefore, tvalAfter; // removed comma
gettimeofday (&tvalBefore, NULL);
int i =0;
while ( i < 10000) {
i ++;
}
gettimeofday (&tvalAfter, NULL);
// Changed format to long int (%ld), changed time calculation
printf("Time in microseconds: %ld microseconds\n",
((tvalAfter.tv_sec - tvalBefore.tv_sec)*1000000L
+tvalAfter.tv_usec) - tvalBefore.tv_usec
); // Added semicolon
return 0;
}
This is how I got an AspNetUser Id and displayed it on my home page
I placed the following code in my HomeController Index() method
ViewBag.userId = User.Identity.GetUserId();
In the view page just call
ViewBag.userId
Run the project and you will be able to see your userId
__construct
was introduced in PHP5 and it is the right way to define your, well, constructors (in PHP4 you used the name of the class for a constructor).
You are not required to define a constructor in your class, but if you wish to pass any parameters on object construction then you need one.
An example could go like this:
class Database {
protected $userName;
protected $password;
protected $dbName;
public function __construct ( $UserName, $Password, $DbName ) {
$this->userName = $UserName;
$this->password = $Password;
$this->dbName = $DbName;
}
}
// and you would use this as:
$db = new Database ( 'user_name', 'password', 'database_name' );
Everything else is explained in the PHP manual: click here
I followed approach as shown in code below to return a dictionary. Created a class and declared dictionary as global and created a function to add value corresponding to some keys in dictionary.
**Note have used Python 2.7 so some minor modification might be required for Python 3+
class a:
global d
d={}
def get_config(self,x):
if x=='GENESYS':
d['host'] = 'host name'
d['port'] = '15222'
return d
Calling get_config method using class instance in a separate python file:
from constant import a
class b:
a().get_config('GENESYS')
print a().get_config('GENESYS').get('host')
print a().get_config('GENESYS').get('port')
You didn't bind all your bindings here
$sql = "SELECT SQL_CALC_FOUND_ROWS *, UNIX_TIMESTAMP(publicationDate) AS publicationDate FROM comments WHERE articleid = :art
ORDER BY " . mysqli_escape_string($order) . " LIMIT :numRows";
$st = $conn->prepare( $sql );
$st->bindValue( ":art", $art, PDO::PARAM_INT );
You've declared a binding called :numRows but you never actually bind anything to it.
UPDATE 2019: I keep getting upvotes on this and that reminded me of another suggestion
Double quotes are string interpolation in PHP, so if you're going to use variables in a double quotes string, it's pointless to use the concat operator. On the flip side, single quotes are not string interpolation, so if you've only got like one variable at the end of a string it can make sense, or just use it for the whole string.
In fact, there's a micro op available here since the interpreter doesn't care about parsing the string for variables. The boost is nearly unnoticable and totally ignorable on a small scale. However, in a very large application, especially good old legacy monoliths, there can be a noticeable performance increase if strings are used like this. (and IMO, it's easier to read anyway)
I recommend using json format, it's easier for parsing
ffprobe -i your-input-file.mp4 -v quiet -print_format json -show_format -show_streams -hide_banner
{
"streams": [
{
"index": 0,
"codec_name": "aac",
"codec_long_name": "AAC (Advanced Audio Coding)",
"profile": "HE-AACv2",
"codec_type": "audio",
"codec_time_base": "1/44100",
"codec_tag_string": "[0][0][0][0]",
"codec_tag": "0x0000",
"sample_fmt": "fltp",
"sample_rate": "44100",
"channels": 2,
"channel_layout": "stereo",
"bits_per_sample": 0,
"r_frame_rate": "0/0",
"avg_frame_rate": "0/0",
"time_base": "1/28224000",
"duration_ts": 305349201,
"duration": "10.818778",
"bit_rate": "27734",
"disposition": {
"default": 0,
"dub": 0,
"original": 0,
"comment": 0,
"lyrics": 0,
"karaoke": 0,
"forced": 0,
"hearing_impaired": 0,
"visual_impaired": 0,
"clean_effects": 0,
"attached_pic": 0
}
}
],
"format": {
"filename": "your-input-file.mp4",
"nb_streams": 1,
"nb_programs": 0,
"format_name": "aac",
"format_long_name": "raw ADTS AAC (Advanced Audio Coding)",
"duration": "10.818778",
"size": "37506",
"bit_rate": "27734",
"probe_score": 51
}
}
you can find the duration information in format section, works both for video and audio
For anyone trying to create a fresh db connection not on laravel but bumped here seeking for answers to run PDO from the Terminal. This would be of help to you. And you can refactor it to work best for you.
<?php
class db
{
private $DBHOST = 'localhost'; // you don't need 127.0.0.1
private $DRIVER = 'mysql';
private $PORT = '8888'; // database port. 8888 is mine
private $DB = 'example-db';
private $PASS = 'example-pass';
private $USER = 'root';
private $SOCKS = ''; // can fill this or leave blank.
// - connect (dummy connection)
private function con()
{
if ($this->SOCKS == '')
{
// run shell command to get
$socks = shell_exec('netstat -ln | grep mysql');
$socks = trim(substr($socks, strpos($socks, '/')));
$this->SOCKS = strlen($socks) > 0 ? ';unix_socket='.$socks : '';
}
else
{
$this->SOCKS = ';unix_socket='.$this->SOCKS;
}
$dsn = $this->DRIVER.':host='.$this->DBHOST.';dbname='.$this->DB;
// add socks
$dsn .= $this->SOCKS;
// add port
$dsn .= (strlen($this->PORT) > 0) ? ';port='.$this->PORT : '';
// extablish connection
$con = new PDO($dsn, $user, $pass);
// return PDO instance.
return $con;
}
// - ends here
// now you can call $this->con() within class to use connection
// would run fine on any terminal
}
hope it helps!
Use gist.github.com. There is a multi-language support(java, c, c++, c#, vb, haskell, ruby, javascript, lua, HTML, SQL, Tcl, Perl, JSON, groovy...)
Here is a sample "Generate LiquiBase changeLogs using Groovy"
The Spinner class implements DialogInterface.OnClickListener
, thereby effectively hijacking the standard View.OnClickListener
.
If you are not using a sub-classed Spinner or don't intend to, choose another answer.
Otherwise just add the following code to your custom Spinner:
@Override
/** Override triggered on 'tap' of closed Spinner */
public boolean performClick() {
// [ Do anything you like here ]
return super.performClick();
}
Example: Display a pre-supplied hint via Snackbar whenever the Spinner is opened:
private String sbMsg=null; // Message seen by user when Spinner is opened.
public void setSnackbarMessage(String msg) { sbMsg=msg; }
@Override
/** Override triggered on 'tap' of closed Spinner */
public boolean performClick() {
if (sbMsg!=null && !sbMsg.isEmpty()) { /* issue Snackbar */ }
return super.performClick();
}
A custom Spinner is a terrific starting point for programmatically standardising Spinner appearance throughout your project.
If interested, looky here
Are you also validating server-side? This is very important.
Using regular expressions for e-mail isn't considered best practice since it's almost impossible to properly encapsulate all of the standards surrounding email. If you do have to use regular expressions I'll usually go down the route of something like:
^.+@.+$
which basically checks you have a value that contains an @. You would then back that up with verification by sending an e-mail to that address.
Any other kind of regex means you risk turning down completely valid e-mail addresses, other than that I agree with the answer provided by @Ben.
I faced the same issue. I tried to read an image from IDLE and tried to display it using cv2.imshow()
, but the display window freezes and shows pythonw.exe
is not responding when trying to close the window.
The post below gives a possible explanation for why this is happening
"Basically, don't do this from IDLE. Write a script and run it from the shell or the script directly if in windows, by naming it with a .pyw extension and double clicking it. There is apparently a conflict between IDLE's own event loop and the ones from GUI toolkits."
When I used imshow()
in a script and execute it rather than running it directly over IDLE, it worked.
Instead of calling /usr/bin/gcc
, use /usr/bin/c99
. This is the Single-Unix-approved way of invoking a C99 compiler. On an Ubuntu system, this points to a script which invokes gcc
after having added the -std=c99
flag, which is precisely what you want.
After hours of searching and looking for answer, finally I made it!!!!! Code is below :))))
HTML:
<form id="fileinfo" enctype="multipart/form-data" method="post" name="fileinfo">
<label>File to stash:</label>
<input type="file" name="file" required />
</form>
<input type="button" value="Stash the file!"></input>
<div id="output"></div>
jQuery:
$(function(){
$('#uploadBTN').on('click', function(){
var fd = new FormData($("#fileinfo"));
//fd.append("CustomField", "This is some extra data");
$.ajax({
url: 'upload.php',
type: 'POST',
data: fd,
success:function(data){
$('#output').html(data);
},
cache: false,
contentType: false,
processData: false
});
});
});
In the upload.php
file you can access the data passed with $_FILES['file']
.
Thanks everyone for trying to help:)
I took the answer from here (with some changes) MDN
I know this is old, but came across it looking for a simpler way, and this is how i do it, just create a new list of the same object and add it to the one you want to use e.g.
Subject[] subjectsList = {new Subject1{....}, new Subject2{....}, new Subject3{....}}
univStudent.subjects = subjectsList ;
You could also do this:
#!/usr/bin/perl
use strict;
use warnings;
$^I = '.bak'; # create a backup copy
while (<>) {
s/<PREF>/ABCD/g; # do the replacement
print; # print to the modified file
}
Invoke the script with by
./script.pl input_file
You will get a file named input_file
, containing your changes, and a file named input_file.bak
, which is simply a copy of the original file.
I am providing the proper method to do this one
/**
* Method to get the index of the given item from the list
* @param stringArray
* @param name
* @return index of the item if item exists else return -1
*/
public static int getIndexOfItemInArray(String[] stringArray, String name) {
if (stringArray != null && stringArray.length > 0) {
ArrayList<String> list = new ArrayList<String>(Arrays.asList(stringArray));
int index = list.indexOf(name);
list.clear();
return index;
}
return -1;
}
MYSQL (This is my preferred way for restoring all specific column reasonId
values, based on primary key id
equivalence)
UPDATE `site` AS destination
INNER JOIN `site_copy` AS backupOnTuesday
ON backupOnTuesday.`id` = destination.`id`
SET destdestination.`reasonId` = backupOnTuesday.`reasonId`
If it works fine on your local environment, probably your remote server's IP is being blocked by the server at the target URL you've set for cURL to use. You need to verify that your remote server is allowed to access the URL you've set for CURLOPT_URL.
The following should work for any struct type. It is based off code by Matt Manela from MSDN forums. As Murph points out the exception handling could be expensive compared to using the Types dedicated TryParse method.
public static bool TryParseStruct<T>(this string value, out Nullable<T> result)
where T: struct
{
if (string.IsNullOrEmpty(value))
{
result = new Nullable<T>();
return true;
}
result = default(T);
try
{
IConvertible convertibleString = (IConvertible)value;
result = new Nullable<T>((T)convertibleString.ToType(typeof(T), System.Globalization.CultureInfo.CurrentCulture));
}
catch(InvalidCastException)
{
return false;
}
catch (FormatException)
{
return false;
}
return true;
}
These were the basic test cases I used.
string parseOne = "1";
int? resultOne;
bool successOne = parseOne.TryParseStruct<int>(out resultOne);
Assert.IsTrue(successOne);
Assert.AreEqual(1, resultOne);
string parseEmpty = string.Empty;
int? resultEmpty;
bool successEmpty = parseEmpty.TryParseStruct<int>(out resultEmpty);
Assert.IsTrue(successEmpty);
Assert.IsFalse(resultEmpty.HasValue);
string parseNull = null;
int? resultNull;
bool successNull = parseNull.TryParseStruct<int>(out resultNull);
Assert.IsTrue(successNull);
Assert.IsFalse(resultNull.HasValue);
string parseInvalid = "FooBar";
int? resultInvalid;
bool successInvalid = parseInvalid.TryParseStruct<int>(out resultInvalid);
Assert.IsFalse(successInvalid);
tldr; jsFiddle Demo
This functionality is not possible with an alert. However, you could use a div
function tempAlert(msg,duration)
{
var el = document.createElement("div");
el.setAttribute("style","position:absolute;top:40%;left:20%;background-color:white;");
el.innerHTML = msg;
setTimeout(function(){
el.parentNode.removeChild(el);
},duration);
document.body.appendChild(el);
}
Use this like this:
tempAlert("close",5000);
I do not think document fires the click event. Try using the body element to capture the click event. Might need to check on that...
I think it will be easier using syntax-based query:
var entryPoint = (from ep in dbContext.tbl_EntryPoint
join e in dbContext.tbl_Entry on ep.EID equals e.EID
join t in dbContext.tbl_Title on e.TID equals t.TID
where e.OwnerID == user.UID
select new {
UID = e.OwnerID,
TID = e.TID,
Title = t.Title,
EID = e.EID
}).Take(10);
And you should probably add orderby
clause, to make sure Top(10)
returns correct top ten items.
If you are a fan of having very flat models, just to support the view, you should create a model specific to this particular view...
public class EditViewModel
public int PersonID { get; set; }
public string PersonName { get; set; }
public int OrderID { get; set; }
public int TotalSum { get; set; }
}
Many people use AutoMapper to map from their domain objects to their flat views.
The idea of the view model is that it just supports the view - nothing else. You have one per view to ensure that it only contains what is required for that view - not loads of properties that you want for other views.
To set a background image without shrinking after adding the child, use this code.
body: Container(
constraints: BoxConstraints.expand(),
decoration: BoxDecoration(
image: DecorationImage(
image: AssetImage("assets/aaa.jpg"),
fit: BoxFit.cover,
)
),
//You can use any widget
child: Column(
children: <Widget>[],
),
),
All you need to do is use the file object as an iterator.
for line in open("log.txt"):
do_something_with(line)
Even better is using context manager in recent Python versions.
with open("log.txt") as fileobject:
for line in fileobject:
do_something_with(line)
This will automatically close the file as well.
Give a try to this
@Override
public void destroyItem(ViewGroup container, int position, Object object) {
// TODO Auto-generated method stub
FragmentManager manager = ((Fragment) object).getFragmentManager();
FragmentTransaction trans = manager.beginTransaction();
trans.remove((Fragment) object);
trans.commit();
super.destroyItem(container, position, object);
}
//As an HTTP redirect (back button will not work )
window.location.replace("http://www.google.com");
//like if you click on a link (it will be saved in the session history,
//so the back button will work as expected)
window.location.href = "http://www.google.com";
The variables/parameters within the class
definition requires { get; set; }
I was using like a variable declaration (stupid of me, because it was working for other scenarios) without
{ get; set; }
Because of which, whatever I send from the JavaScript, it was not being received in the Action method. It was always getting null or empty model.
Once the {get; set;} is added, it worked like charm.
I hope it helps someone who is coming from VB6 style of programming line.
In my case these lines of code added to Web.config
helped a lot:
<system.web>
...
<globalization uiCulture="cs" culture="cs-CZ" />
...
<system.web>
Together with Build action: Embedded Resource
and Custom Tool: PublicResXFileCodeGenerator
.
mylist[c(5,7,9)]
should do it.
You want the sublists returned as sublists of the result list; you don't use [[]]
(or rather, the function is [[
) for that -- as Dason mentions in comments, [[
grabs the element.
I use this to open a workbook and then copy that workbook's data to the template.
Private Sub CommandButton24_Click()
Set Template = ActiveWorkbook
With Application.FileDialog(msoFileDialogOpen)
.InitialFileName = "I:\Group - Finance" ' Yu can select any folder you want
.Filters.Clear
.Title = "Your Title"
If Not .Show Then
MsgBox "No file selected.": Exit Sub
End If
Workbooks.OpenText .SelectedItems(1)
'The below is to copy the file into a new sheet in the workbook and paste those values in sheet 1
Set myfile = ActiveWorkbook
ActiveWorkbook.Sheets(1).Copy after:=ThisWorkbook.Sheets(1)
myfile.Close
Template.Activate
ActiveSheet.Cells.Select
Selection.Copy
Sheets("Sheet1").Select
Cells.Select
ActiveSheet.Paste
End With
I couldn't get it to work with a hardware device. I kept getting the same error, but...
For your emulator you have to choose the IntelX86 Atom System image. Then ADB will connect to your emulator and it will properly install the installDebug.apk.
This is what I had to do.
Also look at this tutorial. It helped me immensely.
I think that in answer should be pointed which type of object do you get in all methods suggested above: is it Series or DataFrame.
When you get column by w.female.
or w[[2]]
(where, suppose, 2 is number of your column) you'll get back DataFrame.
So in this case you can use DataFrame methods like .replace
.
When you use .loc
or iloc
you get back Series, and Series don't have .replace
method, so you should use methods like apply
, map
and so on.
For negative numToRound:
It should be really easy to do this but the standard modulo % operator doesn't handle negative numbers like one might expect. For instance -14 % 12 = -2 and not 10. First thing to do is to get modulo operator that never returns negative numbers. Then roundUp is really simple.
public static int mod(int x, int n)
{
return ((x % n) + n) % n;
}
public static int roundUp(int numToRound, int multiple)
{
return numRound + mod(-numToRound, multiple);
}
inline-styles
in a document have the highest priority, so for example say if you want to change the color of a div
element to blue
, but you've an inline style
with a color
property set to red
<div style="font-size: 18px; color: red;">
Hello World, How Can I Change The Color To Blue?
</div>
div {
color: blue;
/* This Won't Work, As Inline Styles Have Color Red And As
Inline Styles Have Highest Priority, We Cannot Over Ride
The Color Using An Element Selector */
}
So, Should I Use jQuery/Javascript? - Answer Is NO
We can use element-attr
CSS Selector with !important
, note, !important
is important here, else it won't over ride the inline styles..
<div style="font-size: 30px; color: red;">
This is a test to see whether the inline styles can be over ridden with CSS?
</div>
div[style] {
font-size: 12px !important;
color: blue !important;
}
Note: Using
!important
ONLY will work here, but I've useddiv[style]
selector to specifically selectdiv
havingstyle
attribute
Here we go... just copy the code to a module, it's ready to use
Private Type hashtable
key As Variant
value As Variant
End Type
Private GetErrMsg As String
Private Function CreateHashTable(htable() As hashtable) As Boolean
GetErrMsg = ""
On Error GoTo CreateErr
ReDim htable(0)
CreateHashTable = True
Exit Function
CreateErr:
CreateHashTable = False
GetErrMsg = Err.Description
End Function
Private Function AddValue(htable() As hashtable, key As Variant, value As Variant) As Long
GetErrMsg = ""
On Error GoTo AddErr
Dim idx As Long
idx = UBound(htable) + 1
Dim htVal As hashtable
htVal.key = key
htVal.value = value
Dim i As Long
For i = 1 To UBound(htable)
If htable(i).key = key Then Err.Raise 9999, , "Key [" & CStr(key) & "] is not unique"
Next i
ReDim Preserve htable(idx)
htable(idx) = htVal
AddValue = idx
Exit Function
AddErr:
AddValue = 0
GetErrMsg = Err.Description
End Function
Private Function RemoveValue(htable() As hashtable, key As Variant) As Boolean
GetErrMsg = ""
On Error GoTo RemoveErr
Dim i As Long, idx As Long
Dim htTemp() As hashtable
idx = 0
For i = 1 To UBound(htable)
If htable(i).key <> key And IsEmpty(htable(i).key) = False Then
ReDim Preserve htTemp(idx)
AddValue htTemp, htable(i).key, htable(i).value
idx = idx + 1
End If
Next i
If UBound(htable) = UBound(htTemp) Then Err.Raise 9998, , "Key [" & CStr(key) & "] not found"
htable = htTemp
RemoveValue = True
Exit Function
RemoveErr:
RemoveValue = False
GetErrMsg = Err.Description
End Function
Private Function GetValue(htable() As hashtable, key As Variant) As Variant
GetErrMsg = ""
On Error GoTo GetValueErr
Dim found As Boolean
found = False
For i = 1 To UBound(htable)
If htable(i).key = key And IsEmpty(htable(i).key) = False Then
GetValue = htable(i).value
Exit Function
End If
Next i
Err.Raise 9997, , "Key [" & CStr(key) & "] not found"
Exit Function
GetValueErr:
GetValue = ""
GetErrMsg = Err.Description
End Function
Private Function GetValueCount(htable() As hashtable) As Long
GetErrMsg = ""
On Error GoTo GetValueCountErr
GetValueCount = UBound(htable)
Exit Function
GetValueCountErr:
GetValueCount = 0
GetErrMsg = Err.Description
End Function
To use in your VB(A) App:
Public Sub Test()
Dim hashtbl() As hashtable
Debug.Print "Create Hashtable: " & CreateHashTable(hashtbl)
Debug.Print ""
Debug.Print "ID Test Add V1: " & AddValue(hashtbl, "Hallo_0", "Testwert 0")
Debug.Print "ID Test Add V2: " & AddValue(hashtbl, "Hallo_0", "Testwert 0")
Debug.Print "ID Test 1 Add V1: " & AddValue(hashtbl, "Hallo.1", "Testwert 1")
Debug.Print "ID Test 2 Add V1: " & AddValue(hashtbl, "Hallo-2", "Testwert 2")
Debug.Print "ID Test 3 Add V1: " & AddValue(hashtbl, "Hallo 3", "Testwert 3")
Debug.Print ""
Debug.Print "Test 1 Removed V1: " & RemoveValue(hashtbl, "Hallo_1")
Debug.Print "Test 1 Removed V2: " & RemoveValue(hashtbl, "Hallo_1")
Debug.Print "Test 2 Removed V1: " & RemoveValue(hashtbl, "Hallo-2")
Debug.Print ""
Debug.Print "Value Test 3: " & CStr(GetValue(hashtbl, "Hallo 3"))
Debug.Print "Value Test 1: " & CStr(GetValue(hashtbl, "Hallo_1"))
Debug.Print ""
Debug.Print "Hashtable Content:"
For i = 1 To UBound(hashtbl)
Debug.Print CStr(i) & ": " & CStr(hashtbl(i).key) & " - " & CStr(hashtbl(i).value)
Next i
Debug.Print ""
Debug.Print "Count: " & CStr(GetValueCount(hashtbl))
End Sub
No, there is no way to do this yet. I wish they add a future like this in browsers.
EDIT:
Now there is a Full Screen API for the web You can requestFullscreen
on an Video or Canvas element to ask user to give you permisions and make it full screen.
Let's consider this element:
<video controls id="myvideo">
<source src="somevideo.webm"></source>
<source src="somevideo.mp4"></source>
</video>
We can put that video into fullscreen mode with script like this:
var elem = document.getElementById("myvideo");
if (elem.requestFullscreen) {
elem.requestFullscreen();
} else if (elem.mozRequestFullScreen) {
elem.mozRequestFullScreen();
} else if (elem.webkitRequestFullscreen) {
elem.webkitRequestFullscreen();
} else if (elem.msRequestFullscreen) {
elem.msRequestFullscreen();
}
External fragmentation
Total memory space is enough to satisfy a request or to reside a process in it, but it is not contiguous so it can not be used.
Internal fragmentation
Memory block assigned to process is bigger. Some portion of memory is left unused as it can not be used by another process.
Use backticks for system commands, which helps to store their results into Perl variables.
my $pid = 5892;
my $not = ``top -H -p $pid -n 1 | grep myprocess | wc -l`;
print "not = $not\n";
Return 0 on success and non-zero for error. This is the standard used by UNIX and DOS scripting to find out what happened with your program.
I suggest to use Google Guava Throwables class
propagate(Throwable throwable)
Propagates throwable as-is if it is an instance of RuntimeException or Error, or else as a last resort, wraps it in a RuntimeException and then propagates.**
void bar() {
Stream<A> as = ...
as.forEach(a -> {
try {
a.foo()
} catch(Exception e) {
throw Throwables.propagate(e);
}
});
}
UPDATE:
Now that it is deprecated use:
void bar() {
Stream<A> as = ...
as.forEach(a -> {
try {
a.foo()
} catch(Exception e) {
Throwables.throwIfUnchecked(e);
throw new RuntimeException(e);
}
});
}
This is where jQuery really shines for ASP.Net developers. Lets say you have this ASP button:
When that renders, you can look at the source of the page and the id on it won't be btnAwesome, but $ctr001_btnAwesome or something like that. This makes it a pain in the butt to find in javascript. Enter jQuery.
$(document).ready(function() { $("input[id$='btnAwesome']").click(function() { // Do client side button click stuff here. }); });
The id$= is doing a regex match for an id ENDING with btnAwesome.
Edit:
Did you want the ajax call being called from the button click event on the client side? What did you want to call? There are a lot of really good articles on using jQuery to make ajax calls to ASP.Net code behind methods.
The gist of it is you create a static method marked with the WebMethod attribute. You then can make a call to it using jQuery by using $.ajax.
$.ajax({ type: "POST", url: "PageName.aspx/MethodName", data: "{}", contentType: "application/json; charset=utf-8", dataType: "json", success: function(msg) { // Do something interesting here. } });
I learned my WebMethod stuff from: http://encosia.com/2008/05/29/using-jquery-to-directly-call-aspnet-ajax-page-methods/
A lot of really good ASP.Net/jQuery stuff there. Make sure you read up about why you have to use msg.d in the return on .Net 3.5 (maybe since 3.0) stuff.
Is using System.Threading.Timer
mandatory?
If not, System.Timers.Timer
has handy Start()
and Stop()
methods (and an AutoReset
property you can set to false, so that the Stop()
is not needed and you simply call Start()
after executing).
$('element[id$=txtTitle]')
It's not strictly necessary to quote the text fragment you are matching against
I use the following vba code where filename is a string containing the filename I want, and Function RemoveSpecialCharactersAndTruncate is defined below:
worksheet1.Name = RemoveSpecialCharactersAndTruncate(filename)
'Function to remove special characters from file before saving
Private Function RemoveSpecialCharactersAndTruncate$(ByVal FormattedString$)
Dim IllegalCharacterSet$
Dim i As Integer
'Set of illegal characters
IllegalCharacterSet$ = "*." & Chr(34) & "//\[]:;|=,"
'Iterate through illegal characters and replace any instances
For i = 1 To Len(IllegalCharacterSet) - 1
FormattedString$ = Replace(FormattedString$, Mid(IllegalCharacterSet, i, 1), "")
Next
'Return the value capped at 31 characters (Excel limit)
RemoveSpecialCharactersAndTruncate$ = Left(FormattedString$, _
Application.WorksheetFunction.Min(Len(FormattedString), 31))
End Function
Most of the time, you will use them like this:
For example:
In both cases, the request body contains the data for the resource to be created or updated. It should be obvious from the route names that POST is not idempotent (if you call it 3 times it will create 3 objects), but PUT is idempotent (if you call it 3 times the result is the same). PUT is often used for "upsert" operation (create or update), but you can always return a 404 error if you only want to use it to modify.
Note that POST "creates" a new element in the collection, and PUT "replaces" an element at a given URL, but it is a very common practice to use PUT for partial modifications, that is, use it only to update existing resources and only modify the included fields in the body (ignoring the other fields). This is technically incorrect, if you want to be REST-purist, PUT should replace the whole resource and you should use PATCH for the partial update. I personally don't care much as far as the behavior is clear and consistent across all your API endpoints.
Remember, REST is a set of conventions and guidelines to keep your API simple. If you end up with a complicated work-around just to check the "RESTfull" box then you are defeating the purpose ;)
Since everyone else already gave the answer, I'll add a bit of additional context. % the "modulus" operator is actually performing the remainder operation. The difference between mod and rem is subtle, but important.
(-1 mod 2) would normally give 1. More specifically given two integers, X and Y, the operation (X mod Y) tends to return a value in the range [0, Y). Said differently, the modulus of X and Y is always greater than or equal to zero, and less than Y.
Performing the same operation with the "%" or rem operator maintains the sign of the X value. If X is negative you get a result in the range (-Y, 0]. If X is positive you get a result in the range [0, Y).
Often this subtle distinction doesn't matter. Going back to your code question, though, there are multiple ways of solving for "evenness".
The first approach is good for beginners, because it is especially verbose.
// Option 1: Clearest way for beginners
boolean isEven;
if ((a % 2) == 0)
{
isEven = true
}
else
{
isEven = false
}
The second approach takes better advantage of the language, and leads to more succinct code. (Don't forget that the == operator returns a boolean.)
// Option 2: Clear, succinct, code
boolean isEven = ((a % 2) == 0);
The third approach is here for completeness, and uses the ternary operator. Although the ternary operator is often very useful, in this case I consider the second approach superior.
// Option 3: Ternary operator
boolean isEven = ((a % 2) == 0) ? true : false;
The fourth and final approach is to use knowledge of the binary representation of integers. If the least significant bit is 0 then the number is even. This can be checked using the bitwise-and operator (&). While this approach is the fastest (you are doing simple bit masking instead of division), it is perhaps a little advanced/complicated for a beginner.
// Option 4: Bitwise-and
boolean isEven = ((a & 1) == 0);
Here I used the bitwise-and operator, and represented it in the succinct form shown in option 2. Rewriting it in Option 1's form (and alternatively Option 3's) is left as an exercise to the reader. ;)
Hope that helps.
I don't know about determining height just now, but you can use this to put something on the bottom:
<html>
<head>
<title>CSS bottom test</title>
<style>
.bottom {
position: absolute;
bottom: 1em;
left: 1em;
}
</style>
</head>
<body>
<p>regular body stuff.</p>
<div class='bottom'>on the bottom</div>
</body>
</html>
I am getting this issue when using owl carousal and scrolling the images.
So get solved just adding below CSS in your page.
.owl-carousel {
-ms-touch-action: pan-y;
touch-action: pan-y;
}
or
.owl-carousel {
-ms-touch-action: none;
touch-action: none;
}
Finally, I have found a solution and it's a simple one:
document.getElementById("texens").value = "tinkumaster";
Works like a charm. No clue why jQuery does not fall back to this.
Use Callable
instead of Thread, then you can call Future#get()
which throws any exception that the Callable threw.
df <- data.frame(b = c(1, 1, 1), c = c(2, 2, 2), d = c(3, 3, 3))
df
## b c d
## 1 1 2 3
## 2 1 2 3
## 3 1 2 3
df <- data.frame(a = c(0, 0, 0), df)
df
## a b c d
## 1 0 1 2 3
## 2 0 1 2 3
## 3 0 1 2 3
If you are using Kotlin and Kotlin android extensions, then there is a beautiful way of doing this.
val uri = myUriString.toUri()
To add Kotlin extensions (KTX) to your project add the following to your app module's build.gradle
repositories {
google()
}
dependencies {
implementation 'androidx.core:core-ktx:1.0.0-rc01'
}
Cross-browser (old browsers too) and a simple solution:
var docLoaded = setInterval(function () {
if(document.readyState !== "complete") return;
clearInterval(docLoaded);
/*
Your code goes here i.e. init()
*/
}, 30);
export default class MyComponent extends React.Component {
onSubmit(e) {
e.preventDefault();
var title = this.title.value; //added .value
console.log(title);
}
render(){
return (
...
<form className="form-horizontal">
...
<input type="text" className="form-control" ref={input => this.title = input} name="title" />
...
</form>
...
<button type="button" onClick={this.onSubmit} className="btn">Save</button>
...
);
}
};
findAny
& orElse
By using findAny()
and orElse()
:
Person matchingObject = objects.stream().
filter(p -> p.email().equals("testemail")).
findAny().orElse(null);
Stops looking after finding an occurrence.
findAny
Optional<T>Â findAny()
Returns an Optional describing some element of the stream, or an empty Optional if the stream is empty. This is a short-circuiting terminal operation. The behavior of this operation is explicitly nondeterministic; it is free to select any element in the stream. This is to allow for maximal performance in parallel operations; the cost is that multiple invocations on the same source may not return the same result. (If a stable result is desired, use findFirst() instead.)
Use json.loads
not json.load
.
(load
loads from a file-like object, loads
from a string. So you could just as well omit the .read()
call instead.)
Two small contributions to Codo's answer:
' "recursive" version of GetObjectProperty
Public Function GetObjectProperty(ByVal JsonObject As Object, ByVal propertyName As String) As Object
Dim names() As String
Dim i As Integer
names = Split(propertyName, ".")
For i = 0 To UBound(names)
Set JsonObject = ScriptEngine.Run("getProperty", JsonObject, names(i))
Next
Set GetObjectProperty = JsonObject
End Function
' shortcut to object array
Public Function GetObjectArrayProperty(ByVal JsonObject As Object, ByVal propertyName As String) As Object()
Dim a() As Object
Dim i As Integer
Dim l As Integer
Set JsonObject = GetObjectProperty(JsonObject, propertyName)
l = GetProperty(JsonObject, "length") - 1
ReDim a(l)
For i = 0 To l
Set a(i) = GetObjectProperty(JsonObject, CStr(i))
Next
GetObjectArrayProperty = a
End Function
So now I can do stuff like:
Dim JsonObject As Object
Dim Value() As Object
Dim i As Integer
Dim Total As Double
Set JsonObject = DecodeJsonString(CStr(request.responseText))
Value = GetObjectArrayProperty(JsonObject, "d.Data")
For i = 0 To UBound(Value)
Total = Total + Value(i).Amount
Next
Hope this would help you:
public static object GetProperty(object o, string member)
{
if(o == null) throw new ArgumentNullException("o");
if(member == null) throw new ArgumentNullException("member");
Type scope = o.GetType();
IDynamicMetaObjectProvider provider = o as IDynamicMetaObjectProvider;
if(provider != null)
{
ParameterExpression param = Expression.Parameter(typeof(object));
DynamicMetaObject mobj = provider.GetMetaObject(param);
GetMemberBinder binder = (GetMemberBinder)Microsoft.CSharp.RuntimeBinder.Binder.GetMember(0, member, scope, new CSharpArgumentInfo[]{CSharpArgumentInfo.Create(0, null)});
DynamicMetaObject ret = mobj.BindGetMember(binder);
BlockExpression final = Expression.Block(
Expression.Label(CallSiteBinder.UpdateLabel),
ret.Expression
);
LambdaExpression lambda = Expression.Lambda(final, param);
Delegate del = lambda.Compile();
return del.DynamicInvoke(o);
}else{
return o.GetType().GetProperty(member, BindingFlags.Public | BindingFlags.Instance).GetValue(o, null);
}
}
Using !important
is not a good option, as you will most likely want to override your own styles in the future. That leaves us with CSS priorities.
Basically, every selector has its own numerical 'weight':
Among two selector styles browser will always choose the one with more weight. Order of your stylesheets only matters when priorities are even - that's why it is not easy to override Bootstrap.
Your option is to inspect Bootstrap sources, find out how exactly some specific style is defined, and copy that selector so your element has equal priority. But we kinda loose all Bootstrap sweetness in the process.
The easiest way to overcome this is to assign additional arbitrary ID to one of the root elements on your page, like this: <body id="bootstrap-overrides">
This way, you can just prefix any CSS selector with your ID, instantly adding 100 points of weight to the element, and overriding Bootstrap definitions:
/* Example selector defined in Bootstrap */
.jumbotron h1 { /* 10+1=11 priority scores */
line-height: 1;
color: inherit;
}
/* Your initial take at styling */
h1 { /* 1 priority score, not enough to override Bootstrap jumbotron definition */
line-height: 1;
color: inherit;
}
/* New way of prioritization */
#bootstrap-overrides h1 { /* 100+1=101 priority score, yay! */
line-height: 1;
color: inherit;
}
Collections.addAll
is a varargs method which allows us to add any number of items to a collection in a single statement:
List<Integer> list = new ArrayList<>();
Collections.addAll(list, 1, 2, 3, 4, 5);
It can also be used to add array elements to a collection:
Integer[] arr = ...;
Collections.addAll(list, arr);
Use ifelse
df %>%
mutate(g = ifelse(a == 2 | a == 5 | a == 7 | (a == 1 & b == 4), 2,
ifelse(a == 0 | a == 1 | a == 4 | a == 3 | c == 4, 3, NA)))
Added - if_else: Note that in dplyr 0.5 there is an if_else
function defined so an alternative would be to replace ifelse
with if_else
; however, note that since if_else
is stricter than ifelse
(both legs of the condition must have the same type) so the NA
in that case would have to be replaced with NA_real_
.
df %>%
mutate(g = if_else(a == 2 | a == 5 | a == 7 | (a == 1 & b == 4), 2,
if_else(a == 0 | a == 1 | a == 4 | a == 3 | c == 4, 3, NA_real_)))
Added - case_when Since this question was posted dplyr has added case_when
so another alternative would be:
df %>% mutate(g = case_when(a == 2 | a == 5 | a == 7 | (a == 1 & b == 4) ~ 2,
a == 0 | a == 1 | a == 4 | a == 3 | c == 4 ~ 3,
TRUE ~ NA_real_))
Added - arithmetic/na_if If the values are numeric and the conditions (except for the default value of NA at the end) are mutually exclusive, as is the case in the question, then we can use an arithmetic expression such that each term is multiplied by the desired result using na_if
at the end to replace 0 with NA.
df %>%
mutate(g = 2 * (a == 2 | a == 5 | a == 7 | (a == 1 & b == 4)) +
3 * (a == 0 | a == 1 | a == 4 | a == 3 | c == 4),
g = na_if(g, 0))
The main difference is: Web API is a service for any client, any devices, and MVC Controller only serve its client. The same because it is MVC platform.
You need to use \" for escaping " character (\ escape the following character
sed -i 's/\"http://www.fubar.com\"/URL_FUBAR/g'
I am using the InstallUtil.exe packed with .NET Framework.
The usage to uninstall is: InstallUtil '\path\to\assembly\with\the\installer\classes' /u so for example: installutil MyService.HostService.exe /u
The /u
switch stands for uninstall, without it the util performs normal installation of the service. The utility stops the service if it is running and I never had problems with Windows keeping lock on the service files. You can read about other options of InstallUtil on MSDN.
P.S.:if you don't have installutil in your path variable use full path like this: C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe "C:\MyServiceFolder\MyService.HostService.exe" /u
or if you need 64bit version it can be found in 'C:\Windows\Microsoft.NET\Framework64\v4.0.30319\' .The version number in path varies depending on .NET version.
As always, http://www.csszengarden.com/. Note that the images aren't public domain.
It happens because Build Tools revision x doesn't exist.
Today, the latest version is 23.0.2
(subject to change all the time).
The buildToolsVersion
s you want are included in the Android SDK, normally installed in the <sdk>/build-tools/<buildToolsVersion>
directory.
Don't confuse the Android SDK Tools with SDK Build Tools.
Change in your build.gradle
's buildToolsVersion
to some version installed in <sdk>/build-tools
android {
buildToolsVersion "23.0.2"
// ...
}
Someone posted this link to the MDN in a comment, and I think it was very helpful. It describes things like ErrorTypes very thoroughly.
EvalError --- Creates an instance representing an error that occurs regarding the global function eval().
InternalError --- Creates an instance representing an error that occurs when an internal error in the JavaScript engine is thrown. E.g. "too much recursion".
RangeError --- Creates an instance representing an error that occurs when a numeric variable or parameter is outside of its valid range.
ReferenceError --- Creates an instance representing an error that occurs when de-referencing an invalid reference.
SyntaxError --- Creates an instance representing a syntax error that occurs while parsing code in eval().
TypeError --- Creates an instance representing an error that occurs when a variable or parameter is not of a valid type.
URIError --- Creates an instance representing an error that occurs when encodeURI() or decodeURI() are passed invalid parameters.
I prepared following commands to find concise information about a Linux system:
clear
echo "\n----------OS Information------------"
hostnamectl | grep "Static hostname:"
hostnamectl | tail -n 3
echo "\n----------Memory Information------------"
cat /proc/meminfo | grep MemTotal
echo "\n----------CPU Information------------"
echo -n "Number of core(s): "
cat /proc/cpuinfo | grep "processor" | wc -l
cat /proc/cpuinfo | grep "model name" | head -n 1
echo "\n----------Disk Information------------"
echo -n "Total Size: "
df -h --total | tail -n 1| awk '{print $2}'
echo -n "Used: "
df -h --total | tail -n 1| awk '{print $3}'
echo -n "Available: "
df -h --total | tail -n 1| awk '{print $4}'
echo "\n-------------------------------------\n"
Copy and paste in an sh file like info.sh and then run it using command sh info.sh
just parse as an array:
Review[] reviews = new Gson().fromJson(jsonString, Review[].class);
then if you need you can also create a list in this way:
List<Review> asList = Arrays.asList(reviews);
P.S. your json string should be look like this:
[
{
"reviewerID": "A2SUAM1J3GNN3B1",
"asin": "0000013714",
"reviewerName": "J. McDonald",
"helpful": [2, 3],
"reviewText": "I bought this for my husband who plays the piano.",
"overall": 5.0,
"summary": "Heavenly Highway Hymns",
"unixReviewTime": 1252800000,
"reviewTime": "09 13, 2009"
},
{
"reviewerID": "A2SUAM1J3GNN3B2",
"asin": "0000013714",
"reviewerName": "J. McDonald",
"helpful": [2, 3],
"reviewText": "I bought this for my husband who plays the piano.",
"overall": 5.0,
"summary": "Heavenly Highway Hymns",
"unixReviewTime": 1252800000,
"reviewTime": "09 13, 2009"
},
[...]
]
This is deprecated:
as.data.frame(my_table)
Instead use this package:
library("quanteda")
convert(my_table, to="data.frame")
My 2 cents
class Node:
def __init__(self, value=None, next=None):
self.value = value
self.next = next
def __str__(self):
return str(self.value)
class LinkedList:
def __init__(self):
self.first = None
self.last = None
def add(self, x):
current = Node(x, None)
try:
self.last.next = current
except AttributeError:
self.first = current
self.last = current
else:
self.last = current
def print_list(self):
node = self.first
while node:
print node.value
node = node.next
ll = LinkedList()
ll.add("1st")
ll.add("2nd")
ll.add("3rd")
ll.add("4th")
ll.add("5th")
ll.print_list()
# Result:
# 1st
# 2nd
# 3rd
# 4th
# 5th
I use the following method to grab embedded resources:
protected static Stream GetResourceStream(string resourcePath)
{
Assembly assembly = Assembly.GetExecutingAssembly();
List<string> resourceNames = new List<string>(assembly.GetManifestResourceNames());
resourcePath = resourcePath.Replace(@"/", ".");
resourcePath = resourceNames.FirstOrDefault(r => r.Contains(resourcePath));
if (resourcePath == null)
throw new FileNotFoundException("Resource not found");
return assembly.GetManifestResourceStream(resourcePath);
}
I then call this with the path in the project:
GetResourceStream(@"DirectoryPathInLibrary/Filename")
Same as suggested by PherricOxide but in C
#include <sys/stat.h>
int exist(const char *name)
{
struct stat buffer;
return (stat (name, &buffer) == 0);
}
If you only want the orientation tag and nothing else and don't like to include another huge javascript library I wrote a little code that extracts the orientation tag as fast as possible (It uses DataView and readAsArrayBuffer
which are available in IE10+, but you can write your own data reader for older browsers):
function getOrientation(file, callback) {_x000D_
var reader = new FileReader();_x000D_
reader.onload = function(e) {_x000D_
_x000D_
var view = new DataView(e.target.result);_x000D_
if (view.getUint16(0, false) != 0xFFD8)_x000D_
{_x000D_
return callback(-2);_x000D_
}_x000D_
var length = view.byteLength, offset = 2;_x000D_
while (offset < length) _x000D_
{_x000D_
if (view.getUint16(offset+2, false) <= 8) return callback(-1);_x000D_
var marker = view.getUint16(offset, false);_x000D_
offset += 2;_x000D_
if (marker == 0xFFE1) _x000D_
{_x000D_
if (view.getUint32(offset += 2, false) != 0x45786966) _x000D_
{_x000D_
return callback(-1);_x000D_
}_x000D_
_x000D_
var little = view.getUint16(offset += 6, false) == 0x4949;_x000D_
offset += view.getUint32(offset + 4, little);_x000D_
var tags = view.getUint16(offset, little);_x000D_
offset += 2;_x000D_
for (var i = 0; i < tags; i++)_x000D_
{_x000D_
if (view.getUint16(offset + (i * 12), little) == 0x0112)_x000D_
{_x000D_
return callback(view.getUint16(offset + (i * 12) + 8, little));_x000D_
}_x000D_
}_x000D_
}_x000D_
else if ((marker & 0xFF00) != 0xFF00)_x000D_
{_x000D_
break;_x000D_
}_x000D_
else_x000D_
{ _x000D_
offset += view.getUint16(offset, false);_x000D_
}_x000D_
}_x000D_
return callback(-1);_x000D_
};_x000D_
reader.readAsArrayBuffer(file);_x000D_
}_x000D_
_x000D_
// usage:_x000D_
var input = document.getElementById('input');_x000D_
input.onchange = function(e) {_x000D_
getOrientation(input.files[0], function(orientation) {_x000D_
alert('orientation: ' + orientation);_x000D_
});_x000D_
}
_x000D_
<input id='input' type='file' />
_x000D_
values:
-2: not jpeg
-1: not defined
For those using Typescript, you can use the following code:
export const getOrientation = (file: File, callback: Function) => {
var reader = new FileReader();
reader.onload = (event: ProgressEvent) => {
if (! event.target) {
return;
}
const file = event.target as FileReader;
const view = new DataView(file.result as ArrayBuffer);
if (view.getUint16(0, false) != 0xFFD8) {
return callback(-2);
}
const length = view.byteLength
let offset = 2;
while (offset < length)
{
if (view.getUint16(offset+2, false) <= 8) return callback(-1);
let marker = view.getUint16(offset, false);
offset += 2;
if (marker == 0xFFE1) {
if (view.getUint32(offset += 2, false) != 0x45786966) {
return callback(-1);
}
let little = view.getUint16(offset += 6, false) == 0x4949;
offset += view.getUint32(offset + 4, little);
let tags = view.getUint16(offset, little);
offset += 2;
for (let i = 0; i < tags; i++) {
if (view.getUint16(offset + (i * 12), little) == 0x0112) {
return callback(view.getUint16(offset + (i * 12) + 8, little));
}
}
} else if ((marker & 0xFF00) != 0xFF00) {
break;
}
else {
offset += view.getUint16(offset, false);
}
}
return callback(-1);
};
reader.readAsArrayBuffer(file);
}
You gave the answer: -2 will autosize the column to the length of the text in the column header, -1 will autosize to the longest item in the column. All according to MSDN. Note though that in the case of -1, you will need to set the column width after adding the item(s). So if you add a new item, you will also need to assign the width property of the column (or columns) that you want to autosize according to data in ListView
control.
I believe this variation of the theme gives debug categories without the need to have a separate macro name per category.
I used this variation in an Arduino project where program space is limited to 32K and dynamic memory is limited to 2K. The addition of debug statements and trace debug strings quickly uses up space. So it is essential to be able to limit the debug trace that is included at compile time to the minimum necessary each time the code is built.
#ifndef DEBUG_H
#define DEBUG_H
#define PRINT(DEBUG_CATEGORY, VALUE) do { if (DEBUG_CATEGORY & DEBUG_MASK) Serial.print(VALUE);} while (0);
#endif
#define DEBUG_MASK 0x06
#include "Debug.h"
...
PRINT(4, "Time out error,\t");
...
The remotePickupDir
would be the folder you want to go to on the ftp server. As far as "is this script correct", well, does it work? If it works then it's correct. If it does not work, then tell us what error message or unexpected behaviour you're getting and we'll be better able to help you.
val() returns the value of the <select>
element, i.e. the value
attribute of the selected <option>
element.
Since you actually want the inner text of the selected <option>
element, you should match that element and use text() instead:
var nationality = $("#dancerCountry option:selected").text();
Header files can contain any valid C code, since they are injected into the compilation unit by the pre-processor prior to compilation.
If a header file contains a function, and is included by multiple .c
files, each .c
file will get a copy of that function and create a symbol for it. The linker will complain about the duplicate symbols.
It is technically possible to create static
functions in a header file for inclusion in multiple .c
files. Though this is generally not done because it breaks from the convention that code is found in .c
files and declarations are found in .h
files.
See the discussions in C/C++: Static function in header file, what does it mean? for more explanation.
NumberFormat.getNumberInstance(java.util.Locale.US).format(num);
You can do that with a little help of JS. In the example below, a POST request is being submitted on a button click using the fetch method:
const button = document.getElementById('post-btn');_x000D_
_x000D_
button.addEventListener('click', async _ => {_x000D_
try { _x000D_
const response = await fetch('yourUrl', {_x000D_
method: 'post',_x000D_
body: {_x000D_
// Your body_x000D_
}_x000D_
});_x000D_
console.log('Completed!', response);_x000D_
} catch(err) {_x000D_
console.error(`Error: ${err}`);_x000D_
}_x000D_
});
_x000D_
<button id="post-btn">I'm a button</button>
_x000D_
If multiple clock are generated with different frequencies, then clock generation can be simplified if a procedure is called as concurrent procedure call. The time resolution issue, mentioned by Martin Thompson, may be mitigated a little by using different high and low time in the procedure. The test bench with procedure for clock generation is:
library ieee;
use ieee.std_logic_1164.all;
entity tb is
end entity;
architecture sim of tb is
-- Procedure for clock generation
procedure clk_gen(signal clk : out std_logic; constant FREQ : real) is
constant PERIOD : time := 1 sec / FREQ; -- Full period
constant HIGH_TIME : time := PERIOD / 2; -- High time
constant LOW_TIME : time := PERIOD - HIGH_TIME; -- Low time; always >= HIGH_TIME
begin
-- Check the arguments
assert (HIGH_TIME /= 0 fs) report "clk_plain: High time is zero; time resolution to large for frequency" severity FAILURE;
-- Generate a clock cycle
loop
clk <= '1';
wait for HIGH_TIME;
clk <= '0';
wait for LOW_TIME;
end loop;
end procedure;
-- Clock frequency and signal
signal clk_166 : std_logic;
signal clk_125 : std_logic;
begin
-- Clock generation with concurrent procedure call
clk_gen(clk_166, 166.667E6); -- 166.667 MHz clock
clk_gen(clk_125, 125.000E6); -- 125.000 MHz clock
-- Time resolution show
assert FALSE report "Time resolution: " & time'image(time'succ(0 fs)) severity NOTE;
end architecture;
The time resolution is printed on the terminal for information, using the concurrent assert last in the test bench.
If the clk_gen
procedure is placed in a separate package, then reuse from test bench to test bench becomes straight forward.
Waveform for clocks are shown in figure below.
An more advanced clock generator can also be created in the procedure, which can adjust the period over time to match the requested frequency despite the limitation by time resolution. This is shown here:
-- Advanced procedure for clock generation, with period adjust to match frequency over time, and run control by signal
procedure clk_gen(signal clk : out std_logic; constant FREQ : real; PHASE : time := 0 fs; signal run : std_logic) is
constant HIGH_TIME : time := 0.5 sec / FREQ; -- High time as fixed value
variable low_time_v : time; -- Low time calculated per cycle; always >= HIGH_TIME
variable cycles_v : real := 0.0; -- Number of cycles
variable freq_time_v : time := 0 fs; -- Time used for generation of cycles
begin
-- Check the arguments
assert (HIGH_TIME /= 0 fs) report "clk_gen: High time is zero; time resolution to large for frequency" severity FAILURE;
-- Initial phase shift
clk <= '0';
wait for PHASE;
-- Generate cycles
loop
-- Only high pulse if run is '1' or 'H'
if (run = '1') or (run = 'H') then
clk <= run;
end if;
wait for HIGH_TIME;
-- Low part of cycle
clk <= '0';
low_time_v := 1 sec * ((cycles_v + 1.0) / FREQ) - freq_time_v - HIGH_TIME; -- + 1.0 for cycle after current
wait for low_time_v;
-- Cycle counter and time passed update
cycles_v := cycles_v + 1.0;
freq_time_v := freq_time_v + HIGH_TIME + low_time_v;
end loop;
end procedure;
Again reuse through a package will be nice.
Starting with .Net 4.5 you can use Task.Run to simply start an action:
void Foo(string args){}
...
Task.Run(() => Foo("bar"));
You can use Simpsons rule or the Trapezium rule to calculate the area under a graph given a table of y-values at a regular interval.
Python script that calculates Simpsons rule:
def integrate(y_vals, h):
i = 1
total = y_vals[0] + y_vals[-1]
for y in y_vals[1:-1]:
if i % 2 == 0:
total += 2 * y
else:
total += 4 * y
i += 1
return total * (h / 3.0)
h
is the offset (or gap) between y values, and y_vals
is an array of well, y values.
Example (In same file as above function):
y_values = [13, 45.3, 12, 1, 476, 0]
interval = 1.2
area = integrate(y_values, interval)
print("The area is", area)
You can use a converter or create new property in your ViewModel like that:
public bool CanDoIt
{
get
{
return !string.IsNullOrEmpty(SomeField);
}
}
and use it:
<DataTrigger Binding="{Binding SomeField}" Value="{Binding CanDoIt}">
I know this is old but this is what worked for me
Order by Isnull(Date,'12/31/9999')
I was writing my code in PHP, and I had a bit of trouble using concat and union functions, and also did not use SQL variables, any ways I got it to work, here is my code:
//first I connected to the information_scheme DB
$headercon=mysqli_connect("localhost", "USERNAME", "PASSWORD", "information_schema");
//took the healders out in a string (I could not get the concat function to work, so I wrote a loop for it)
$headers = '';
$sql = "SELECT column_name AS columns FROM `COLUMNS` WHERE table_schema = 'YOUR_DB_NAME' AND table_name = 'YOUR_TABLE_NAME'";
$result = $headercon->query($sql);
while($row = $result->fetch_row())
{
$headers = $headers . "'" . $row[0] . "', ";
}
$headers = substr("$headers", 0, -2);
// connect to the DB of interest
$con=mysqli_connect("localhost", "USERNAME", "PASSWORD", "YOUR_DB_NAME");
// export the results to csv
$sql4 = "SELECT $headers UNION SELECT * FROM YOUR_TABLE_NAME WHERE ... INTO OUTFILE '/output.csv' FIELDS TERMINATED BY ','";
$result4 = $con->query($sql4);
d = dict.fromkeys(a, 0)
a
is the list, 0
is the default value. Pay attention not to set the default value to some mutable object (i.e. list or dict), because it will be one object used as value for every key in the dictionary (check here for a solution for this case). Numbers/strings are safe.
use moment in your function like this
moment(new Date(date)).format('MM/DD/YYYY')
I would recommend using DialogFragment
.
Sure, creating a "Yes/No" dialog with it is pretty complex considering that it should be rather simple task, but creating a similar dialog box with Dialog
is surprisingly complicated as well.
(Activity lifecycle makes it complicated - you must let Activity
manage the lifecycle of the dialog box - and there is no way to pass custom parameters e.g. the custom message to Activity.showDialog
if using API levels under 8)
The nice thing is that you can usually build your own abstraction on top of DialogFragment
pretty easily.
Another possible mistake that could produce this problem,
Make sure you didn't included bootstrap.js
script more than once in your page!
I was wondering if two times WORKDIR
will work or not, but it worked :)
FROM ubuntu:18.04
RUN apt-get update && \
apt-get install -y python3.6
WORKDIR /usr/src
COPY ./ ./
WORKDIR /usr/src/src
CMD ["python3", "app.py"]
Using explicit parameters, it would be:
$msbuild = 'C:\WINDOWS\Microsoft.NET\Framework\v3.5\MSBuild.exe'
start-Process -FilePath $msbuild -ArgumentList '/v:q','/nologo'
EDIT: quotes.
var
and let
var
and let
are a statement to the machine and to other programmers:
I intend that the value of this assignment change over the course of execution. Do not rely on the eventual value of this assignment.
var
and let
var
and let
force other programmers to read all the intervening code from the declaration to the eventual use, and reason about the value of the assignment at that point in the program's execution.
They weaken machine reasoning for ESLint and other language services to correctly detect mistyped variable names in later assignments and scope reuse of outer scope variable names where the inner scope forgets to declare.
They also cause runtimes to run many iterations over all codepaths to detect that they are actually, in fact, constants, before they can optimise them. Although this is less of a problem than bug detection and developer comprehensibility.
const
If the value of the reference does not change over the course of execution, the correct syntax to express the programmer's intent is const
. For objects, changing the value of the reference means pointing to another object, as the reference is immutable, but the object is not.
const
" objectsFor object references, the pointer cannot be changed to another object, but the object that is created and assigned to a const
declaration is mutable. You can add or remove items from a const
referenced array, and mutate property keys on a const
referenced object.
To achieve immutable objects (which again, make your code easier to reason about for humans and machines), you can Object.freeze
the object at declaration/assignment/creation, like this:
const Options = Object.freeze(['YES', 'NO'])
Object.freeze does have an impact on performance, but your code is probably slow for other reasons. You want to profile it.
You can also encapsulate the mutable object in a state machine and return deep copies as values (this is how Redux and React state work). See Avoiding mutable global state in Browser JS for an example of how to build this from first principles.
var
and let
are a good matchlet
and var
represent mutable state. They should, in my opinion, only be used to model actual mutable state. Things like "is the connection alive?".
These are best encapsulated in testable state machines that expose constant values that represent "the current state of the connection", which is a constant at any point in time, and what the rest of your code is actually interested in.
Programming is already hard enough with composing side-effects and transforming data. Turning every function into an untestable state machine by creating mutable state with variables just piles on the complexity.
For a more nuanced explanation, see Shun the Mutant - The case for const
.
Just be careful when you want to dismiss the dialog - use dialog.dismiss()
. In my first attempt I used dismissDialog(0)
(which I probably copied from some place) which sometimes works. Using the object the system supplies sounds like a safer choice.
With Git, you can do practically anything offline, because everybody has their own repository.
Making branches and merging between branches is really easy.
Even if you don't have commit rights for a project, you can still have your own repository online, and publish "push requests" for your patches. Everybody who likes your patches can pull them into their project, including the official maintainers.
It's trivial to fork a project, modify it, and still keep merging in the bugfixes from the HEAD branch.
Git works for the Linux kernel developers. That means it is really fast (it has to be), and scales to thousands of contributors. Git also uses less space (up to 30 times less space for the Mozilla repository).
Git is very flexible, very TIMTOWTDI (There is more than one way to do it). You can use whatever workflow you want, and Git will support it.
Finally, there's GitHub, a great site for hosting your Git repositories.
Drawbacks of Git:
GitLab's "merge request" feature is equivalent to GitHub's "pull request" feature. Both are means of pulling changes from another branch or fork into your branch and merging the changes with your existing code. They are useful tools for code review and change management.
An article from GitLab discusses the differences in naming the feature:
Merge or pull requests are created in a git management application and ask an assigned person to merge two branches. Tools such as GitHub and Bitbucket choose the name pull request since the first manual action would be to pull the feature branch. Tools such as GitLab and Gitorious choose the name merge request since that is the final action that is requested of the assignee. In this article we'll refer to them as merge requests.
A "merge request" should not be confused with the git merge
command. Neither should a "pull request" be confused with the git pull
command. Both git
commands are used behind the scenes in both pull requests and merge requests, but a merge/pull request refers to a much broader topic than just these two commands.
Maybe using cookielib.CookieJar can help you. For instance when posting to a page containing a form:
import urllib2
import urllib
from cookielib import CookieJar
cj = CookieJar()
opener = urllib2.build_opener(urllib2.HTTPCookieProcessor(cj))
# input-type values from the html form
formdata = { "username" : username, "password": password, "form-id" : "1234" }
data_encoded = urllib.urlencode(formdata)
response = opener.open("https://page.com/login.php", data_encoded)
content = response.read()
EDIT:
After Piotr's comment I'll elaborate a bit. From the docs:
The CookieJar class stores HTTP cookies. It extracts cookies from HTTP requests, and returns them in HTTP responses. CookieJar instances automatically expire contained cookies when necessary. Subclasses are also responsible for storing and retrieving cookies from a file or database.
So whatever requests you make with your CookieJar
instance, all cookies will be handled automagically. Kinda like your browser does :)
I can only speak from my own experience and my 99% use-case for cookies is to receive a cookie and then need to send it with all subsequent requests in that session. The code above handles just that, and it does so transparently.
You can pass arguments to your custom directive as you do with the builtin Angular-directives - by specifying an attribute on the directive-element:
angular.element(document.getElementById('wrapper'))
.append('<directive-name title="title2"></directive-name>');
What you need to do is define the scope
(including the argument(s)/parameter(s)) in the factory function of your directive. In below example the directive takes a title
-parameter. You can then use it, for example in the template
, using the regular Angular-way: {{title}}
app.directive('directiveName', function(){
return {
restrict:'E',
scope: {
title: '@'
},
template:'<div class="title"><h2>{{title}}</h2></div>'
};
});
Depending on how/what you want to bind, you have different options:
=
is two-way binding@
simply reads the value (one-way binding)&
is used to bind functionsIn some cases you may want use an "external" name which differs from the "internal" name. With external I mean the attribute name on the directive-element and with internal I mean the name of the variable which is used within the directive's scope.
For example if we look at above directive, you might not want to specify another, additional attribute for the title, even though you internally want to work with a title
-property. Instead you want to use your directive as follows:
<directive-name="title2"></directive-name>
This can be achieved by specifying a name behind the above mentioned option in the scope definition:
scope: {
title: '@directiveName'
}
Please also note following things:
data-
. Angular supports this by stripping the data-
-prefix from any attributes. So in above example you could specify the attribute on the element (data-title="title2"
) and internally everything would be the same.<div data-my-attribute="..." />
while in code (e.g. properties on scope object) they are in the form of myAttribute
. I lost lots of time before I realized this.Something no one seems to have noted yet is readability. Having…
CONVERT(SomeType,
SomeReallyLongExpression
+ ThatMayEvenSpan
+ MultipleLines
)
…may be easier to understand than…
CAST(SomeReallyLongExpression
+ ThatMayEvenSpan
+ MultipleLines
AS SomeType
)
Try the childElementCount property:
if ( element.childElementCount !== 0 ){
alert('i have children');
} else {
alert('no kids here');
}
See C# Operators for C# operators including OR which is ||
The previous answers seem all to be a little confusing or incomplete, so here is a table of the differences...
+----------------+-----------------+----------------+----------------+
| Command | Displays Output | Can Get Output | Gets Exit Code |
+----------------+-----------------+----------------+----------------+
| system() | Yes (as text) | Last line only | Yes |
| passthru() | Yes (raw) | No | Yes |
| exec() | No | Yes (array) | Yes |
| shell_exec() | No | Yes (string) | No |
| backticks (``) | No | Yes (string) | No |
+----------------+-----------------+----------------+----------------+
Other misc things to be aware of:
Without any imports, but also incompatible with imported modules:
try:
raise TypeError("Hello, World!") # line 2
except Exception as e:
print(
type(e).__name__, # TypeError
__file__, # /tmp/example.py
e.__traceback__.tb_lineno # 2
)
$ python3 /tmp/example.py
TypeError /tmp/example.py 2
To reiterate, this does not work across import
s or modules, so if you do import X; try: X.example();
then the filename and line number will point to the line containing X.example()
instead of the line where it went wrong within X.example()
. If anyone knows how to easily get the file name and line number from the last stack trace line (I expected something like e[-1].filename
, but no such luck), please improve this answer.
I'll suggest using unless
and blank
to check is empty or not.
Example :
unless a.blank?
a = "Is not empty"
end
This will know 'a' empty or not. If 'a' is blank then the below code will not run.
Well, the way you're timing things looks pretty nasty to me. It would be much more sensible to just time the whole loop:
var stopwatch = Stopwatch.StartNew();
for (int i = 1; i < 100000000; i++)
{
Fibo(100);
}
stopwatch.Stop();
Console.WriteLine("Elapsed time: {0}", stopwatch.Elapsed);
That way you're not at the mercy of tiny timings, floating point arithmetic and accumulated error.
Having made that change, see whether the "non-catch" version is still slower than the "catch" version.
EDIT: Okay, I've tried it myself - and I'm seeing the same result. Very odd. I wondered whether the try/catch was disabling some bad inlining, but using [MethodImpl(MethodImplOptions.NoInlining)]
instead didn't help...
Basically you'll need to look at the optimized JITted code under cordbg, I suspect...
EDIT: A few more bits of information:
n++;
line still improves performance, but not by as much as putting it around the whole blockArgumentException
in my tests) it's still fastWeird...
EDIT: Okay, we have disassembly...
This is using the C# 2 compiler and .NET 2 (32-bit) CLR, disassembling with mdbg (as I don't have cordbg on my machine). I still see the same performance effects, even under the debugger. The fast version uses a try
block around everything between the variable declarations and the return statement, with just a catch{}
handler. Obviously the slow version is the same except without the try/catch. The calling code (i.e. Main) is the same in both cases, and has the same assembly representation (so it's not an inlining issue).
Disassembled code for fast version:
[0000] push ebp
[0001] mov ebp,esp
[0003] push edi
[0004] push esi
[0005] push ebx
[0006] sub esp,1Ch
[0009] xor eax,eax
[000b] mov dword ptr [ebp-20h],eax
[000e] mov dword ptr [ebp-1Ch],eax
[0011] mov dword ptr [ebp-18h],eax
[0014] mov dword ptr [ebp-14h],eax
[0017] xor eax,eax
[0019] mov dword ptr [ebp-18h],eax
*[001c] mov esi,1
[0021] xor edi,edi
[0023] mov dword ptr [ebp-28h],1
[002a] mov dword ptr [ebp-24h],0
[0031] inc ecx
[0032] mov ebx,2
[0037] cmp ecx,2
[003a] jle 00000024
[003c] mov eax,esi
[003e] mov edx,edi
[0040] mov esi,dword ptr [ebp-28h]
[0043] mov edi,dword ptr [ebp-24h]
[0046] add eax,dword ptr [ebp-28h]
[0049] adc edx,dword ptr [ebp-24h]
[004c] mov dword ptr [ebp-28h],eax
[004f] mov dword ptr [ebp-24h],edx
[0052] inc ebx
[0053] cmp ebx,ecx
[0055] jl FFFFFFE7
[0057] jmp 00000007
[0059] call 64571ACB
[005e] mov eax,dword ptr [ebp-28h]
[0061] mov edx,dword ptr [ebp-24h]
[0064] lea esp,[ebp-0Ch]
[0067] pop ebx
[0068] pop esi
[0069] pop edi
[006a] pop ebp
[006b] ret
Disassembled code for slow version:
[0000] push ebp
[0001] mov ebp,esp
[0003] push esi
[0004] sub esp,18h
*[0007] mov dword ptr [ebp-14h],1
[000e] mov dword ptr [ebp-10h],0
[0015] mov dword ptr [ebp-1Ch],1
[001c] mov dword ptr [ebp-18h],0
[0023] inc ecx
[0024] mov esi,2
[0029] cmp ecx,2
[002c] jle 00000031
[002e] mov eax,dword ptr [ebp-14h]
[0031] mov edx,dword ptr [ebp-10h]
[0034] mov dword ptr [ebp-0Ch],eax
[0037] mov dword ptr [ebp-8],edx
[003a] mov eax,dword ptr [ebp-1Ch]
[003d] mov edx,dword ptr [ebp-18h]
[0040] mov dword ptr [ebp-14h],eax
[0043] mov dword ptr [ebp-10h],edx
[0046] mov eax,dword ptr [ebp-0Ch]
[0049] mov edx,dword ptr [ebp-8]
[004c] add eax,dword ptr [ebp-1Ch]
[004f] adc edx,dword ptr [ebp-18h]
[0052] mov dword ptr [ebp-1Ch],eax
[0055] mov dword ptr [ebp-18h],edx
[0058] inc esi
[0059] cmp esi,ecx
[005b] jl FFFFFFD3
[005d] mov eax,dword ptr [ebp-1Ch]
[0060] mov edx,dword ptr [ebp-18h]
[0063] lea esp,[ebp-4]
[0066] pop esi
[0067] pop ebp
[0068] ret
In each case the *
shows where the debugger entered in a simple "step-into".
EDIT: Okay, I've now looked through the code and I think I can see how each version works... and I believe the slower version is slower because it uses fewer registers and more stack space. For small values of n
that's possibly faster - but when the loop takes up the bulk of the time, it's slower.
Possibly the try/catch block forces more registers to be saved and restored, so the JIT uses those for the loop as well... which happens to improve the performance overall. It's not clear whether it's a reasonable decision for the JIT to not use as many registers in the "normal" code.
EDIT: Just tried this on my x64 machine. The x64 CLR is much faster (about 3-4 times faster) than the x86 CLR on this code, and under x64 the try/catch block doesn't make a noticeable difference.
Bring up the context menu (i.e. right click) in the source code window of the desired class. Then select the Source
submenu; from that menu selecting Generate Getters and Setters...
will cause a wizard window to appear.
Source -> Generate Getters and Setters...
Select the variables you wish to create getters and setters for and click OK
.
s = 'sdsd'
print (s.upper())
upper = raw_input('type in something lowercase.')
lower = raw_input('type in the same thing caps lock.')
print upper.upper()
print lower.lower()
An alternative to services is to use the value store.
In the base of my app I added this
var agentApp = angular.module('rbAgent', ['ui.router', 'rbApp.tryGoal', 'rbApp.tryGoal.service', 'ui.bootstrap']);
agentApp.value('agentMemory',
{
contextId: '',
sessionId: ''
}
);
...
And then in my controller I just reference the value store. I don't think it holds thing if the user closes the browser.
angular.module('rbAgent')
.controller('AgentGoalListController', ['agentMemory', '$scope', '$rootScope', 'config', '$state', function(agentMemory, $scope, $rootScope, config, $state){
$scope.config = config;
$scope.contextId = agentMemory.contextId;
...
It's really easy to do this, simply send the file via an XHR request inside of the file input's onchange handler.
<input id="myFileInput" type="file" accept="image/*;capture=camera">
var myInput = document.getElementById('myFileInput');
function sendPic() {
var file = myInput.files[0];
// Send file here either by adding it to a `FormData` object
// and sending that via XHR, or by simply passing the file into
// the `send` method of an XHR instance.
}
myInput.addEventListener('change', sendPic, false);
If you have C++11 you can make use of auto
.
for (auto it = my_vector.rbegin(); it != my_vector.rend(); ++it)
{
}
Mike; Everytime I need to modify an XML document I work it this way:
//Here is the variable with which you assign a new value to the attribute
string newValue = string.Empty;
XmlDocument xmlDoc = new XmlDocument();
xmlDoc.Load(xmlFile);
XmlNode node = xmlDoc.SelectSingleNode("Root/Node/Element");
node.Attributes[0].Value = newValue;
xmlDoc.Save(xmlFile);
//xmlFile is the path of your file to be modified
I hope you find it useful
Instead of using string interpolation you could simply format the DateTime using the ToString("u")
method and concatenate that with the rest of the string:
$startTime = Get-Date
Write-Host "The script was started " + $startTime.ToString("u")
Specifying a non-static position, e.g., position: absolute/relative
on a node means that it will be used as the reference for absolutely positioned elements within it http://jsfiddle.net/E5eEk/1/
See https://developer.mozilla.org/en-US/docs/Learn/CSS/CSS_layout/Positioning#Positioning_contexts
We can change the positioning context — which element the absolutely positioned element is positioned relative to. This is done by setting positioning on one of the element's ancestors.
#outer {_x000D_
min-width: 2000px; _x000D_
min-height: 1000px; _x000D_
background: #3e3e3e; _x000D_
position:relative_x000D_
}_x000D_
_x000D_
#inner {_x000D_
left: 1%; _x000D_
top: 45px; _x000D_
width: 50%; _x000D_
height: auto; _x000D_
position: absolute; _x000D_
z-index: 1;_x000D_
}_x000D_
_x000D_
#inner-inner {_x000D_
background: #efffef;_x000D_
position: absolute; _x000D_
height: 400px; _x000D_
right: 0px; _x000D_
left: 0px;_x000D_
}
_x000D_
<div id="outer">_x000D_
<div id="inner">_x000D_
<div id="inner-inner"></div>_x000D_
</div>_x000D_
</div>
_x000D_
You had thead
in your selector, but there is no thead
in your table. Also you had your selectors backwards. As you mentioned above, you wanted to be adding the tr
class to the th
, not vice-versa (although your comment seems to contradict what you wrote up above).
$('tr th').each(function(index){ if($('tr td').eq(index).attr('class') != ''){ // get the class of the td var tdClass = $('tr td').eq(index).attr('class'); // add it to this th $(this).addClass(tdClass ); } });
Frustratingly, you have to enable showing the dividers from code in your activity. For example:
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Set the view to your layout
setContentView(R.layout.yourlayout);
// Find the LinearLayout within and enable the divider
((LinearLayout)v.findViewById(R.id.llTopBar)).
setShowDividers(LinearLayout.SHOW_DIVIDER_MIDDLE);
}
It depends what you mean by empty.
To check if there is no text (this allows child elements that are empty themselves):
if ($('#leftmenu').text() == '')
To check if there are no child elements or text:
if ($('#leftmenu').contents().length == 0)
Or,
if ($('#leftmenu').html() == '')
You could try something like this as well
<a href="#" onclick="one(); two();" >click</a>
<script type="text/javascript">
function one(){
alert('test');
}
function two(){
alert('test2');
}
</script>
As Davide Gualano has been told. This one
$("#myDiv").load("myScript.php?var=x&var2=y&var3=z")
use GET method for sending the request, and this one
$("#myDiv").load("myScript.php", {var:x, var2:y, var3:z})
use POST method for sending the request. But any limitation that is applied to each method (post/get) is applied to the alternative usages that has been mentioned in the question.
For example: url length limits the amount of sending data in GET method.
in my case, i tried creating the sqlite db in /tmp
folder and from all the slashes i missed a single slash
Instead of sqlite:///tmp/mydb.sqlite
-> sqlite:////tmp/mydb.sqlite
...
Personal experience with PostgreSQL, still waiting for a faster way.
1. Create table skeleton first if the file is stored locally:
drop table if exists ur_table;
CREATE TABLE ur_table
(
id serial NOT NULL,
log_id numeric,
proc_code numeric,
date timestamp,
qty int,
name varchar,
price money
);
COPY
ur_table(id, log_id, proc_code, date, qty, name, price)
FROM '\path\xxx.csv' DELIMITER ',' CSV HEADER;
2. When the \path\xxx.csv is on the server, postgreSQL doesn't have the permission to access the server, you will have to import the .csv file through the pgAdmin built in functionality.
Right click the table name choose import.
If you still have problem, please refer this tutorial. http://www.postgresqltutorial.com/import-csv-file-into-posgresql-table/
Alternatively:
var exception = err as Web2PDFException;
if ( excecption != null )
{
Web2PDFException wex = exception;
....
}
Try this:
/**
* The template for displaying demo page
*
* template name: demo template
*
*/
With PowerShell 5.1 (PackageManagement module)
Install-Package -Name MyPackage -Source (Get-Location).Path -Destination C:\outputdirectory
Since git 1.8 (October 2012) you are able to do this from the command line:
git remote set-url origin --push --add user1@repo1
git remote set-url origin --push --add user2@repo2
git remote -v
Then git push
will push to user1@repo1, then push to user2@repo2.
as described in http://channel9.msdn.com/posts/Anders-Hejlsberg-Steve-Lucco-and-Luke-Hoban-Inside-TypeScript at 00:33:52 they had built a tool to convert WebIDL and WinRT metadata into TypeScript d.ts
When using the MVVM Command pattern for Button function (recommended practice), a simple way to trigger the effect of the Button is as follows:
someButton.Command.Execute(someButton.CommandParameter);
This will use the Command object which the button triggers and pass the CommandParameter defined by the XAML.
Just use Hour
and Minute
properties
var date = DateTime.Now;
date.Hour;
date.Minute;
Or you can easily zero the seconds using
var zeroSecondDate = date.AddSeconds(-date.Second);
The ModuleNotFoundError
has been introduced in python 3.6 and can be used for this purpose
try:
import eggs
except ModuleNotFoundError:
# Error handling
pass
The error is raised when a module or one of its parents cannot be found. So
try:
import eggs.sub
except ModuleNotFoundError as err:
# Error handling
print(err)
would print a message that looks like No module named 'eggs'
if the eggs
module cannot be found; but would print something like No module named 'eggs.sub'
if only the sub
module couldn't be found but the eggs
package could be found.
See the documentation of the import system for more info on the ModuleNotFoundError
It's probably caused by a local network connectivity issue (but also a DNS error is possible). Unfortunately HResult
is generic, however you can determine the exact issue catching HttpRequestException
and then inspecting InnerException
: if it's a WebException
then you can check the WebException.Status
property, for example WebExceptionStatus.NameResolutionFailure
should indicate a DNS resolution problem.
It may happen, there isn't much you can do.
What I'd suggest to always wrap that (network related) code in a loop with a try
/catch
block (as also suggested here for other fallible operations). Handle known exceptions, wait a little (say 1000 msec) and try again (for say 3 times). Only if failed all times then you can quit/report an error to your users. Very raw example like this:
private const int NumberOfRetries = 3;
private const int DelayOnRetry = 1000;
public static async Task<HttpResponseMessage> GetFromUrlAsync(string url) {
using (var client = new HttpClient()) {
for (int i=1; i <= NumberOfRetries; ++i) {
try {
return await client.GetAsync(url);
}
catch (Exception e) when (i < NumberOfRetries) {
await Task.Delay(DelayOnRetry);
}
}
}
}
Or
// First, checks if it isn't implemented yet.
if (!String.prototype.format) {
String.prototype.format = function() {
var args = arguments;
return this.replace(/{(\d+)}/g, function(match, number) {
return typeof args[number] != 'undefined'
? args[number]
: match
;
});
};
}
"{0} is dead, but {1} is alive! {0} {2}".format("ASP", "ASP.NET")
Both answers pulled from JavaScript equivalent to printf/string.format
You need to make sure that a mac compatible version of java exists on your computer. Do java -version from terminal to check that. If not, download the apple jdk from the apple website. (Sun doesn't make one for apple themselves, IIRC.)
From there, follow the same command line instructions from compiling your program that you would use for java on any other platform.
Might be already answered, but you can try this simple program to determine if and what installation of boost you have :
#include<boost/version.hpp>
#include<iostream>
using namespace std;
int main()
{
cout<<BOOST_VERSION<<endl;
return 0;
}
I also had issues with this part of the tutorial (used tutorial for version 1.7).
My mistake was that I only edited the 'Django administration' string, and did not pay enough attention to the manual.
This is the line from django/contrib/admin/templates/admin/base_site.html:
<h1 id="site-name"><a href="{% url 'admin:index' %}">{{ site_header|default:_('Django administration') }}</a></h1>
But after some time and frustration it became clear that there was the 'site_header or default:_' statement, which should be removed. So after removing the statement (like the example in the manual everything worked like expected).
Example manual:
<h1 id="site-name"><a href="{% url 'admin:index' %}">Polls Administration</a></h1>
I think this was because the option for USB debugging wasn't checked on the device
If you want more than one style this is the correct full answer. This is div with class and style:
<div className="class-example" style={{width: '300px', height: '150px'}}></div>
If you want to harness Selenium IDE record & playback capabilities for Chrome browser there is an equivalent extension for Chrome called Scirocco. You can add it to Chrome by visiting here using your Chrome browser https://chrome.google.com/webstore/search/scirocco
Scirocco is created by Sonix Asia and is not as polished as Selenium IDE for Firefox. It is in fact quite buggy in places. But it does what you ask.
Depending on what browsers/devices you are looking to support, or what you are prepared to put up with for non-compliant browsers you may want to check out the <summary>
and <detail>
tags. They are for exactly this purpose. No css is required at all as the collapsing and showing are part of the tags definition/formatting.
I've made an example here:
<details>
<summary>This is what you want to show before expanding</summary>
<p>This is where you put the details that are shown once expanded</p>
</details>
Browser support varies. Try in webkit for best results. Other browsers may default to showing all the solutions. You can perhaps fallback to the hide/show method described above.
You could use a pre tag instead of a div. This would automatically display your \n's in the correct way.
<!DOCTYPE html>
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.0/jquery.min.js"></script>
<script>
$(document).ready(function(){
var display_txt = "1st line text" +"\n" + "2nd line text";
$('#somediv').html(display_txt).css("color", "green");
});
</script>
</head>
<body>
<pre>
<p id="somediv"></p>
</pre>
</body>
</html>
i used pixi.js and pixi-sound.js to achieve the auto play in chrome and firefox.
<script>
PIXI.sound.Sound.from({
url: 'audios/tuto.mp3',
loop:true,
preload: true,
loaded: function(err, sound) {
sound.play();
document.querySelector("#paused").addEventListener('click', function() {
const paused = PIXI.sound.togglePauseAll();
this.className = this.className.replace(/\b(on|off)/g, '');
this.className += paused ? 'on' : 'off';
});
}
});
</script>
HTML:
<button class="btn1 btn-lg off" id="paused">
<span class="glyphicon glyphicon-pause off"></span>
<span class="glyphicon glyphicon-play on"></span>
</button>
it also works on mobile devices but user have to touch somewhere on the screen to trigger the sound.
Give hibernate.connection.url
as "jdbc:oracle:thin:@127.0.0.1:1521:xe"
then you can solve above issue. Because oracle's default SID is "xe" so we should give like this. When I gave like this data has been inserted into DB without any SQL exceptions, it's my real time experience.
This worked for me:
SELECT *
FROM your_table
WHERE id IN (
SELECT MAX(id)
FROM your_table
GROUP BY name
);
Each time you do e.nextElement()
you skip one. So you skip two elements in each iteration of your loop.
It tells the compiler that you're in a Single Thread Apartment model. This is an evil COM thing, it's usually used for Windows Forms (GUI's) as that uses Win32 for its drawing, which is implemented as STA. If you are using something that's STA model from multiple threads then you get corrupted objects.
This is why you have to invoke onto the Gui from another thread (if you've done any forms coding).
Basically don't worry about it, just accept that Windows GUI threads must be marked as STA otherwise weird stuff happens.
On which point does
HTTPURLConnection
try to establish a connection to the given URL?
On the port named in the URL if any, otherwise 80 for HTTP and 443 for HTTPS. I believe this is documented.
On which point can I know that I was able to successfully establish a connection?
When you call getInputStream()
or getOutputStream()
or getResponseCode()
without getting an exception.
Are establishing a connection and sending the actual request done in one step/method call? What method is it?
No and none.
Can you explain the function of
getOutputStream()
andgetInputStream()
in layman's term?
Either of them first connects if necessary, then returns the required stream.
I notice that when the server I'm trying to connect to is down, I get an Exception at
getOutputStream()
. Does it mean thatHTTPURLConnection
will only start to establish a connection when I invokegetOutputStream()
? How about thegetInputStream()
? Since I'm only able to get the response atgetInputStream()
, then does it mean that I didn't send any request atgetOutputStream()
yet but simply establishes a connection? DoHttpURLConnection
go back to the server to request for response when I invokegetInputStream()
?
See above.
Am I correct to say that
openConnection()
simply creates a new connection object but does not establish any connection yet?
Yes.
How can I measure the read overhead and connect overhead?
Connect: take the time getInputStream()
or getOutputStream()
takes to return, whichever you call first. Read: time from starting first read to getting the EOS.
Sometimes even after installing python-dev the error persists, Check for the error if it is 'gcc' missing.
First download as stated in https://stackoverflow.com/a/21530768/8687063, then install gcc
For apt (Ubuntu, Debian...):
sudo apt-get install gcc
For yum (CentOS, RHEL...):
sudo yum install gcc
For dnf (Fedora...):
sudo dnf install gcc
For zypper (openSUSE...):
sudo zypper in gcc
For apk (Alpine...):
sudo apk gcc
Dim x as date
x = dr("appdate")
appdate = x.tostring("dd/MM/yyyy")
dr is the variable of datareader
Old Version before V6: here's the documentation
const fs = require('fs');
fs.exists('/etc/passwd', (exists) => {
console.log(exists ? 'it\'s there' : 'no passwd!');
});
// or Sync
if (fs.existsSync('/etc/passwd')) {
console.log('it\'s there');
}
UPDATE
New versions from V6: documentation for fs.stat
fs.stat('/etc/passwd', function(err, stat) {
if(err == null) {
//Exist
} else if(err.code == 'ENOENT') {
// NO exist
}
});
It failed because you used ajax="false"
. This fires a full synchronous request which in turn causes a full page reload, causing the oncomplete
to be never fired (note that all other ajax-related attributes like process
, onstart
, onsuccess
, onerror
and update
are also never fired).
That it worked when you removed actionListener
is also impossible. It should have failed the same way. Perhaps you also removed ajax="false"
along it without actually understanding what you were doing. Removing ajax="false"
should indeed achieve the desired requirement.
Also is it possible to execute actionlistener and oncomplete simultaneously?
No. The script can only be fired before or after the action listener. You can use onclick
to fire the script at the moment of the click. You can use onstart
to fire the script at the moment the ajax request is about to be sent. But they will never exactly simultaneously be fired. The sequence is as follows:
onclick
JavaScript code is executedprocess
and current HTML DOM treeonstart
JavaScript code is executedprocess
actionListener
JSF backing bean method is executedaction
JSF backing bean method is executedupdate
and current JSF component treeonsuccess
JavaScript code is executedonerror
JavaScript code is executedupdate
based on ajax response and current HTML DOM treeoncomplete
JavaScript code is executedNote that the update
is performed after actionListener
, so if you were using onclick
or onstart
to show the dialog, then it may still show old content instead of updated content, which is poor for user experience. You'd then better use oncomplete
instead to show the dialog. Also note that you'd better use action
instead of actionListener
when you intend to execute a business action.
You can use them right inline:
var square = 9.4
var floored = floor(square)
var root = sqrt(floored)
println("Starting with \(square), we rounded down to \(floored), then took the square root to end up with \(root)")
For the sake of completeness, let me mention that there are some places (on a Windows PC) to look for javaw.exe
in case it is not found in the path:
(Still Reimeus' suggestion should be your first attempt.)
1.
Java usually stores it's location in Registry, under the following key:
HKLM\Software\JavaSoft\Java Runtime Environement\<CurrentVersion>\JavaHome
2.
Newer versions of JRE/JDK, seem to also place a copy of javaw.exe
in 'C:\Windows\System32', so one might want to check there too (although chances are, if it is there, it will be found in the path as well).
3.
Of course there are the "usual" install locations:
[Note, that for older versions of Windows (XP, Vista(?)), this will only help on english versions of the OS. Fortunately, on later version of Windows "Program Files" will point to the directory regardless of its "display name" (which is language-specific).]
A little while back, I wrote this piece of code to check for javaw.exe
in the aforementioned places. Maybe someone finds it useful:
static protected String findJavaw() {
Path pathToJavaw = null;
Path temp;
/* Check in Registry: HKLM\Software\JavaSoft\Java Runtime Environement\<CurrentVersion>\JavaHome */
String keyNode = "HKLM\\Software\\JavaSoft\\Java Runtime Environment";
List<String> output = new ArrayList<>();
executeCommand(new String[] {"REG", "QUERY", "\"" + keyNode + "\"",
"/v", "CurrentVersion"},
output);
Pattern pattern = Pattern.compile("\\s*CurrentVersion\\s+\\S+\\s+(.*)$");
for (String line : output) {
Matcher matcher = pattern.matcher(line);
if (matcher.find()) {
keyNode += "\\" + matcher.group(1);
List<String> output2 = new ArrayList<>();
executeCommand(
new String[] {"REG", "QUERY", "\"" + keyNode + "\"",
"/v", "JavaHome"},
output2);
Pattern pattern2
= Pattern.compile("\\s*JavaHome\\s+\\S+\\s+(.*)$");
for (String line2 : output2) {
Matcher matcher2 = pattern2.matcher(line2);
if (matcher2.find()) {
pathToJavaw = Paths.get(matcher2.group(1), "bin",
"javaw.exe");
break;
}
}
break;
}
}
try {
if (Files.exists(pathToJavaw)) {
return pathToJavaw.toString();
}
} catch (Exception ignored) {}
/* Check in 'C:\Windows\System32' */
pathToJavaw = Paths.get("C:\\Windows\\System32\\javaw.exe");
try {
if (Files.exists(pathToJavaw)) {
return pathToJavaw.toString();
}
} catch (Exception ignored) {}
/* Check in 'C:\Program Files\Java\jre*' */
pathToJavaw = null;
temp = Paths.get("C:\\Program Files\\Java");
if (Files.exists(temp)) {
try (DirectoryStream<Path> dirStream
= Files.newDirectoryStream(temp, "jre*")) {
for (Path path : dirStream) {
temp = Paths.get(path.toString(), "bin", "javaw.exe");
if (Files.exists(temp)) {
pathToJavaw = temp;
// Don't "break", in order to find the latest JRE version
}
}
if (pathToJavaw != null) {
return pathToJavaw.toString();
}
} catch (Exception ignored) {}
}
/* Check in 'C:\Program Files (x86)\Java\jre*' */
pathToJavaw = null;
temp = Paths.get("C:\\Program Files (x86)\\Java");
if (Files.exists(temp)) {
try (DirectoryStream<Path> dirStream
= Files.newDirectoryStream(temp, "jre*")) {
for (Path path : dirStream) {
temp = Paths.get(path.toString(), "bin", "javaw.exe");
if (Files.exists(temp)) {
pathToJavaw = temp;
// Don't "break", in order to find the latest JRE version
}
}
if (pathToJavaw != null) {
return pathToJavaw.toString();
}
} catch (Exception ignored) {}
}
/* Check in 'C:\Program Files\Java\jdk*' */
pathToJavaw = null;
temp = Paths.get("C:\\Program Files\\Java");
if (Files.exists(temp)) {
try (DirectoryStream<Path> dirStream
= Files.newDirectoryStream(temp, "jdk*")) {
for (Path path : dirStream) {
temp = Paths.get(path.toString(), "jre", "bin", "javaw.exe");
if (Files.exists(temp)) {
pathToJavaw = temp;
// Don't "break", in order to find the latest JDK version
}
}
if (pathToJavaw != null) {
return pathToJavaw.toString();
}
} catch (Exception ignored) {}
}
/* Check in 'C:\Program Files (x86)\Java\jdk*' */
pathToJavaw = null;
temp = Paths.get("C:\\Program Files (x86)\\Java");
if (Files.exists(temp)) {
try (DirectoryStream<Path> dirStream
= Files.newDirectoryStream(temp, "jdk*")) {
for (Path path : dirStream) {
temp = Paths.get(path.toString(), "jre", "bin", "javaw.exe");
if (Files.exists(temp)) {
pathToJavaw = temp;
// Don't "break", in order to find the latest JDK version
}
}
if (pathToJavaw != null) {
return pathToJavaw.toString();
}
} catch (Exception ignored) {}
}
return "javaw.exe"; // Let's just hope it is in the path :)
}
In simplejson
(or the library json
in Python 2.6 and later), loads
takes a JSON string and returns a Python data structure, dumps
takes a Python data structure and returns a JSON string. JSON string can encode Javascript arrays, not just objects, and a Python list corresponds to a JSON string encoding an array. To get a JSON string such as
{"apple":"cat", "banana":"dog"}
the Python object you pass to json.dumps
could be:
dict(apple="cat", banana="dog")
though the JSON string is also valid Python syntax for the same dict
. I believe the specific string you say you expect is simply invalid JSON syntax, however.
If you need to set the credentials on the fly, have a look at this source:
http://spc3.codeplex.com/SourceControl/changeset/view/57957#1015709
private ICredentials BuildCredentials(string siteurl, string username, string password, string authtype) {
NetworkCredential cred;
if (username.Contains(@"\")) {
string domain = username.Substring(0, username.IndexOf(@"\"));
username = username.Substring(username.IndexOf(@"\") + 1);
cred = new System.Net.NetworkCredential(username, password, domain);
} else {
cred = new System.Net.NetworkCredential(username, password);
}
CredentialCache cache = new CredentialCache();
if (authtype.Contains(":")) {
authtype = authtype.Substring(authtype.IndexOf(":") + 1); //remove the TMG: prefix
}
cache.Add(new Uri(siteurl), authtype, cred);
return cache;
}
The few lines you posted from your script look okay to me. It's probably something a bit deeper.
You need to find which line is giving you this error. Add set -xv
to the top of your script. This will print out the line number and the command that's being executed to STDERR. This will help you identify where in your script you're getting this particular error.
BTW, do you have a shebang at the top of your script? When I see something like this, I normally expect its an issue with the Shebang. For example, if you had #! /bin/bash
on top, but your bash interpreter is located in /usr/bin/bash
, you'll see this error.
New question: How can I save the file correctly in the first place, to avoid having to perform this fix every time I resend the file?
Two ways:
Thanks to https://stackoverflow.com/users/1652962/cimmanon that gave me the answer.
The solution is setting a height to the vertical scrollable element. For example:
#container article {
flex: 1 1 auto;
overflow-y: auto;
height: 0px;
}
The element will have height because flexbox recalculates it unless you want a min-height so you can use height: 100px;
that it is exactly the same as: min-height: 100px;
#container article {
flex: 1 1 auto;
overflow-y: auto;
height: 100px; /* == min-height: 100px*/
}
So the best solution if you want a min-height
in the vertical scroll:
#container article {
flex: 1 1 auto;
overflow-y: auto;
min-height: 100px;
}
If you just want full vertical scroll in case there is no enough space to see the article:
#container article {
flex: 1 1 auto;
overflow-y: auto;
min-height: 0px;
}
The final code: http://jsfiddle.net/ch7n6/867/
Just use Control.Invoke Method or Control.BeginInvoke Method.
Great example: How to: Make Thread-Safe Calls to Windows Forms Controls.
the getText
method returns a String, while the setText
receives a String, so you can write it like label1.setText(nameField.getText());
in your listener.
Here's a minimalist way to do it.
System.out.print("Please enter an integer: ");
while(!scan.hasNextInt()) scan.next();
int demoInt = scan.nextInt();
For android, I would use String android.net.Uri.encode(String s)
Encodes characters in the given string as '%'-escaped octets using the UTF-8 scheme. Leaves letters ("A-Z", "a-z"), numbers ("0-9"), and unreserved characters ("_-!.~'()*") intact. Encodes all other characters.
Ex/
String urlEncoded = "http://stackoverflow.com/search?q=" + Uri.encode(query);
There are two steps:
Below is an example:
dbByte, _ := json.Marshal(dbContent)
_ = json.Unmarshal(dbByte, &MyStruct)
For Mac OS X, I replaced the utilities that come with the operating system and replaced them with a newer version of coreutils. This allows you to access tools like readlink -f
(for absolute path to files) and realpath
(absolute path to directories) on your Mac.
The Homebrew version appends a 'G' (for GNU Tools) in front of the command name -- so the equivalents become greadlink -f FILE
and grealpath DIRECTORY
.
Instructions for how to install the coreutils/GNU Tools on Mac OS X through Homebrew can be found in this StackExchange arcticle.
NB: The readlink -f
and realpath
commands should work out of the box for non-Mac Unix users.
You can use Bootbox
dialog boxes
$(document).ready(function() {
$('#btnDelete').click(function() {
bootbox.confirm("Are you sure want to delete?", function(result) {
alert("Confirm result: " + result);
});
});
});
Selectors can be combined:
.bar:nth-child(2)
means "thing that has class bar" that is also the 2nd child.
I have added a helper da()
to Laravel which in fact works as an alias for dd($object->toArray())
Here is the Gist: https://gist.github.com/TommyZG/0505eb331f240a6324b0527bc588769c
Just adding this. In your package.json, if your "main": "index.js" is correctly set. Just use node .
{
"name": "app",
"version": "1.0.0",
"description": "",
"main": "index.js",
"scripts": {
...
},
"keywords": [],
"author": "",
"license": "ISC",
"dependencies": {
...
},
"devDependencies": {
...
}
}
I'm still having problems figuring out exactly how I find out what a user is typing into a ckeditor textarea.
Ok, this is fairly easy. Assuming your editor is named "editor1", this will give you an alert with your its contents:
alert(CKEDITOR.instances.editor1.getData());
The harder part is detecting when the user types. From what I can tell, there isn't actually support to do that (and I'm not too impressed with the documentation btw). See this article: http://alfonsoml.blogspot.com/2011/03/onchange-event-for-ckeditor.html
Instead, I would suggest setting a timer that is going to continuously update your second div with the value of the textarea:
timer = setInterval(updateDiv,100);
function updateDiv(){
var editorText = CKEDITOR.instances.editor1.getData();
$('#trackingDiv').html(editorText);
}
This seems to work just fine. Here's the entire thing for clarity:
<textarea id="editor1" name="editor1">This is sample text</textarea>
<div id="trackingDiv" ></div>
<script type="text/javascript">
CKEDITOR.replace( 'editor1' );
timer = setInterval(updateDiv,100);
function updateDiv(){
var editorText = CKEDITOR.instances.editor1.getData();
$('#trackingDiv').html(editorText);
}
</script>
You can find your Arduino via Terminal with
ls /dev/tty.*
then you can read that serial port using the screen command, like this
screen /dev/tty.[yourSerialPortName] [yourBaudRate]
for example:
screen /dev/tty.usbserial-A6004byf 9600
Step 1 . Go to Androidsdk\platform-tools on PC/Laptop
Step 2 :
Connect your device via USB and run:
adb kill-server
then run
adb tcpip 5555
you will see below message...
daemon not running. starting it now on port 5037 * daemon started successfully * restarting in TCP mode port: 5555
Step3:
Now open new CMD window,
Go to Androidsdk\platform-tools
Now run
adb connect xx.xx.xx.xx:5555
(xx.xx.xx.xx is device IP)
Step4: Disconnect your device from USB and it will work as if connected from your Android studio.
A better approach would be to delegate the event, which means catching it as it bubbles to the parent node.
This solution is both more robust and efficient.
It allows the event to be handled even if more rows are dynamically added to the table later, and also results in attaching a single event handler to the parent node (table
element), instead of one for each child node (tr
element).
Assuming that the OP's example is a simplified one, the table's structure can be more complex, for example:
<table id="indexedTable">
...
<tr>
<td><p>1</p></td>
<td>2</td>
<td><p>3</p></td>
</tr>
</table>
Therefore, a simplistic approach such as getting e.target.parentElement
will not work, as clicking the internal <p>
and clicking the center <td>
will produce different results.
Using delegation normalizes the event handling, only assuming that there are no nested tables.
Both of the following snippets are equivalent:
$("#indexedTable").delegate("tr", "click", function(e) {
console.log($(e.currentTarget).index() + 1);
});
$("#indexedTable").on("click", "tr", function(e) {
console.log($(e.currentTarget).index() + 1);
});
They attach a listener to table
element and handle any event that bubbles from the table rows. The current API is the on
method and the delegate
method is legacy API (and actually calls on
behind the scenes).
Note that the order of parameters to both functions is different.
A comparison between direct handler attachment and delegation is available below or on jsFiddle:
$("#table-delegate").on("click", "tr", function(e) {_x000D_
var idx = $(e.currentTarget).index() + 1;_x000D_
$("#delegation-idx").text(idx); _x000D_
console.log('delegated', idx);_x000D_
});_x000D_
_x000D_
$("#table-direct tr").on("click", function(e) {_x000D_
var idx = $(e.currentTarget).index() + 1;_x000D_
$("#direct-idx").text(idx);_x000D_
console.log('direct', idx);_x000D_
});_x000D_
_x000D_
$('[data-action=add-row]').click(function(e) {_x000D_
var id = e.target.dataset.table;_x000D_
$('#' + id + ' tbody')_x000D_
.append($('<tr><td>extra</td><td>extra</td><td>extra</td></tr>')[0])_x000D_
});
_x000D_
tr:hover{_x000D_
background:#ddd;_x000D_
}_x000D_
_x000D_
button.add-row {_x000D_
margin-bottom: 5px;_x000D_
}
_x000D_
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>_x000D_
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>_x000D_
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" rel="stylesheet"/>_x000D_
_x000D_
_x000D_
<h1>Event handling test</h1>_x000D_
<p>Add rows to both tables and see the difference in handling.</p>_x000D_
<p>Event delegation attaches a single event listener and events related to newly added children are caught.</p>_x000D_
<p>Direct event handling attaches an event handler to each child, where children added after the inital handler attachment don't have a handler attached to them, and therefore their indices won't be logged to console.</p>_x000D_
<h2>Delegation</h2>_x000D_
<p><span>row index: </span><span id="delegation-idx">unknown</span></p>_x000D_
<button class="add-row" data-action="add-row" data-table="table-delegate">Add row to delegation</button>_x000D_
<table id="table-delegate" class="table">_x000D_
<tbody>_x000D_
<tr>_x000D_
<td>normal</td>_x000D_
<td>normal</td>_x000D_
<td>normal</td>_x000D_
</tr>_x000D_
<tr>_x000D_
<td><p>nested</p></td>_x000D_
<td><p>nested</p></td>_x000D_
<td><p>nested</p></td>_x000D_
</tr>_x000D_
<tr>_x000D_
<td>normal</td>_x000D_
<td>normal</td>_x000D_
<td><p>nested</p></td>_x000D_
</tr>_x000D_
_x000D_
</table>_x000D_
_x000D_
<h2>Direct attachment</h2>_x000D_
<p><span>row index: </span><span id="direct-idx">unknown</span></p>_x000D_
<button class="add-row" data-action="add-row" data-table="table-direct">Add row to direct</button>_x000D_
<table id="table-direct" class="table">_x000D_
<tbody>_x000D_
<tr>_x000D_
<td>normal</td>_x000D_
<td>normal</td>_x000D_
<td>normal</td>_x000D_
</tr>_x000D_
<tr>_x000D_
<td><p>nested</p></td>_x000D_
<td><p>nested</p></td>_x000D_
<td><p>nested</p></td>_x000D_
</tr>_x000D_
<tr>_x000D_
<td>normal</td>_x000D_
<td>normal</td>_x000D_
<td><p>nested</p></td>_x000D_
</tr>_x000D_
_x000D_
</tbody>_x000D_
</table>
_x000D_
Here's the demo on jsFiddle.
P.S:
If you do have nested tables (or, in the general case, wish to delegate to elements with specific depth), you can use this suggestion from the jQuery bug report.
You have to use absolute path to see if the file exists.
$abs_path = '/var/www/example.com/public_html/images/';
$file_url = 'http://www.example.com/images/' . $filename;
if (file_exists($abs_path . $filename)) {
echo "The file exists. URL:" . $file_url;
} else {
echo "The file does not exist";
}
If you are writing for CMS or PHP framework then as far as I know all of them have defined constant for document root path.
e.g WordPress uses ABSPATH which can be used globally for working with files on the server using your code as well as site url.
Wordpress example:
$image_path = ABSPATH . '/images/' . $filename;
$file_url = get_site_url() . '/images/' . $filename;
if (file_exists($image_path)) {
echo "The file exists. URL:" . $file_url;
} else {
echo "The file does not exist";
}
I'm going an extra mile here :). Because this code would no need much maintenance and pretty solid, I would write it with as shorthand if statement:
$image_path = ABSPATH . '/images/' . $filename;
$file_url = get_site_url() . '/images/' . $filename;
echo (file_exists($image_path))?'The file exists. URL:' . $file_url:'The file does not exist';
Shorthand IF statement explained:
$stringVariable = ($trueOrFalseComaprison > 0)?'String if true':'String if false';
The equivalent of null
in VB is Nothing
so your check wants to be:
If editTransactionRow.pay_id IsNot Nothing Then
stTransactionPaymentID = editTransactionRow.pay_id
End If
Or possibly, if you are actually wanting to check for a SQL null value:
If editTransactionRow.pay_id <> DbNull.Value Then
...
End If
When Python2.x sees a == b
, it tries the following.
type(b)
is a new-style class, and type(b)
is a subclass of type(a)
, and type(b)
has overridden __eq__
, then the result is b.__eq__(a)
.type(a)
has overridden __eq__
(that is, type(a).__eq__
isn't object.__eq__
), then the result is a.__eq__(b)
.type(b)
has overridden __eq__
, then the result is b.__eq__(a)
.__cmp__
. If it exists, the objects are equal iff it returns zero
.object.__eq__(a, b)
, which is True
iff a
and b
are the same object.If any of the special methods return NotImplemented
, Python acts as though the method didn't exist.
Note that last step carefully: if neither a
nor b
overloads ==
, then a == b
is the same as a is b
.
Just killing time... A recursive function
void foo(Node* node)
{
if(node == NULL)
return;
// Do something with node...
foo(node->left);
foo(node->right);
}
can be converted to
void foo(Node* node)
{
if(node == NULL)
return;
// Do something with node...
stack.push(node->right);
stack.push(node->left);
while(!stack.empty()) {
node1 = stack.pop();
if(node1 == NULL)
continue;
// Do something with node1...
stack.push(node1->right);
stack.push(node1->left);
}
}
brew switch to python3 by default, so if you want to still set python2 as default bin python, running:
brew unlink python && brew link python2 --force
For Java 8:
You can use inbuilt java.time.format.DateTimeFormatter
to reduce any chance of typos,
like
DateTimeFormatter formatter = DateTimeFormatter.ISO_ZONED_DATE_TIME;
ISO_ZONED_DATE_TIME represents 2011-12-03T10:15:30+01:00[Europe/Paris]
is one of the bundled standard DateTime formats provided by Oracle link
This one get everything between the "." characters. Please note this won't work for more complex URLs like "www.somesite.co.uk" Ideally the function would check for how many instances of the "." character and choose the substring accordingly.
CREATE FUNCTION dbo.GetURL (@URL VARCHAR(250))
RETURNS VARCHAR(250)
AS BEGIN
DECLARE @Work VARCHAR(250)
SET @Work = @URL
SET @Work = SUBSTRING(@work, CHARINDEX('.', @work) + 1, LEN(@work))
SET @Work = SUBSTRING(@work, 0, CHARINDEX('.', @work))
--Alternate:
--SET @Work = SUBSTRING(@work, CHARINDEX('.', @work) + 1, CHARINDEX('.', @work) + 1)
RETURN @work
END
A silly hack I did was to set the height of the element to zero but overflow:visible; combining this with pointer-events:none; seems to cover all the bases.
.overlay {
height:0px;
overflow:visible;
pointer-events:none;
background:none !important;
}
Here is also the code to handle the result:
def foo (a):
x=a
y=a*2
return (x,y)
(x,y) = foo(50)
You can get access to the options array of a selected object by going document.getElementById("cars").options
where 'cars' is the select object.
Once you have that you can call option[i].setAttribute('selected', 'selected');
to select an option.
I agree with every one else that you are better off doing this server side though.