This is the right way to properly Dispose the DataTable
.
private DataTable CreateSchema_Table()
{
DataTable td = null;
try
{
td = new DataTable();
//use table DataTable here
return td.Copy();
}
catch { }
finally
{
if (td != null)
{
td.Constraints.Clear();
td.Clear();
td.Dispose();
td = null;
}
}
}
If a class, or anything derived from it, might hold the last live reference to an object with a finalizer, then either GC.SuppressFinalize(this)
or GC.KeepAlive(this)
should be called on the object after any operation that might be adversely affected by that finalizer, thus ensuring that the finalizer won't run until after that operation is complete.
The cost of GC.KeepAlive()
and GC.SuppressFinalize(this)
are essentially the same in any class that doesn't have a finalizer, and classes that do have finalizers should generally call GC.SuppressFinalize(this)
, so using the latter function as the last step of Dispose()
may not always be necessary, but it won't be wrong.
Apart from its primary use as a way to control the lifetime of system resources (completely covered by the awesome answer of Ian, kudos!), the IDisposable/using combo can also be used to scope the state change of (critical) global resources: the console, the threads, the process, any global object like an application instance.
I've written an article about this pattern: http://pragmateek.com/c-scope-your-global-state-changes-with-idisposable-and-the-using-statement/
It illustrates how you can protect some often used global state in a reusable and readable manner: console colors, current thread culture, Excel application object properties...
If you are using other managed objects that are using unmanaged resources, it is not your responsibility to ensure those are finalized. Your responsibility is to call Dispose on those objects when Dispose is called on your object, and it stops there.
If your class doesn't use any scarce resources, I fail to see why you would make your class implement IDisposable. You should only do so if you're:
Yes, the code that uses your code must call the Dispose method of your object. And yes, the code that uses your object can use using
as you've shown.
(2 again?) It is likely that the WebClient uses either unmanaged resources, or other managed resources that implement IDisposable. The exact reason, however, is not important. What is important is that it implements IDisposable, and so it falls on you to act upon that knowledge by disposing of the object when you're done with it, even if it turns out WebClient uses no other resources at all.
Short answer: No, the statement in the currently accepted answer is NOT accurate: "The general consensus is that you do not (should not) need to dispose of HttpClient".
Long answer: BOTH of the following statements are true and achieveable at the same time:
IDisposable
object is supposed/recommended to be disposed.And they DO NOT NECESSARILY CONFLICT with each other. It is just a matter of how you organize your code to reuse an HttpClient
AND still dispose it properly.
An even longer answer quoted from my another answer:
It is not a coincidence to see people
in some blog posts blaming how HttpClient
's IDisposable
interface
makes them tend to use the using (var client = new HttpClient()) {...}
pattern
and then lead to exhausted socket handler problem.
I believe that comes down to an unspoken (mis?)conception: "an IDisposable object is expected to be short-lived".
HOWEVER, while it certainly looks like a short-lived thing when we write code in this style:
using (var foo = new SomeDisposableObject())
{
...
}
the official documentation on IDisposable
never mentions IDisposable
objects have to be short-lived.
By definition, IDisposable is merely a mechanism to allow you to release unmanaged resources.
Nothing more. In that sense, you are EXPECTED to eventually trigger the disposal,
but it does not require you to do so in a short-lived fashion.
It is therefore your job to properly choose when to trigger the disposal, base on your real object's life cycle requirement. There is nothing stopping you from using an IDisposable in a long-lived way:
using System;
namespace HelloWorld
{
class Hello
{
static void Main()
{
Console.WriteLine("Hello World!");
using (var client = new HttpClient())
{
for (...) { ... } // A really long loop
// Or you may even somehow start a daemon here
}
// Keep the console window open in debug mode.
Console.WriteLine("Press any key to exit.");
Console.ReadKey();
}
}
}
With this new understanding, now we revisit that blog post,
we can clearly notice that the "fix" initializes HttpClient
once but never dispose it,
that is why we can see from its netstat output that,
the connection remains at ESTABLISHED state which means it has NOT been properly closed.
If it were closed, its state would be in TIME_WAIT instead.
In practice, it is not a big deal to leak only one connection open after your entire program ends,
and the blog poster still see a performance gain after the fix;
but still, it is conceptually incorrect to blame IDisposable and choose to NOT dispose it.
A quick jump into Reflector.NET shows that the Close()
method on StreamWriter
is:
public override void Close()
{
this.Dispose(true);
GC.SuppressFinalize(this);
}
And StreamReader
is:
public override void Close()
{
this.Dispose(true);
}
The Dispose(bool disposing)
override in StreamReader
is:
protected override void Dispose(bool disposing)
{
try
{
if ((this.Closable && disposing) && (this.stream != null))
{
this.stream.Close();
}
}
finally
{
if (this.Closable && (this.stream != null))
{
this.stream = null;
/* deleted for brevity */
base.Dispose(disposing);
}
}
}
The StreamWriter
method is similar.
So, reading the code it is clear that that you can call Close()
& Dispose()
on streams as often as you like and in any order. It won't change the behaviour in any way.
So it comes down to whether or not it is more readable to use Dispose()
, Close()
and/or using ( ... ) { ... }
.
My personal preference is that using ( ... ) { ... }
should always be used when possible as it helps you to "not run with scissors".
But, while this helps correctness, it does reduce readability. In C# we already have plethora of closing curly braces so how do we know which one actually performs the close on the stream?
So I think it is best to do this:
using (var stream = ...)
{
/* code */
stream.Close();
}
It doesn't affect the behaviour of the code, but it does aid readability.
Annotate the property like below
[Key]
[DatabaseGenerated(DatabaseGeneratedOption.Identity)]
public int ID { get; set; }
To use identity columns for all value-generated properties on a new model, simply place the following in your context's OnModelCreating():
builder.ForNpgsqlUseIdentityColumns();
This will create make all keys and other properties which have .ValueGeneratedOnAdd() have Identity by default. You can use ForNpgsqlUseIdentityAlwaysColumns() to have Identity always, and you can also specify identity on a property-by-property basis with UseNpgsqlIdentityColumn() and UseNpgsqlIdentityAlwaysColumn().
Do you have adequate permissions to your repo'?
My solution was unrelated to git
, however I was seeing the same error messages, and dirty status of submodules.
The root-cause was some files in the .git
folder were owned by root
, so git
did not have write access, therefore git
could not change the dirty state of submodules when run as my user.
Do you have the same problem?
From your repository's root folder, use find
to list files owned by root [optional]
find .git -user root
Sollution [Linux]
Change all files in the .git
folder to have you as the owner
sudo chown -R $USER:$USER .git
# alternatively, only the files listed in the above command...
sudo find .git -user root -exec chown $USER:$USER {} +
How did this happen?
In my case I built libraries in sub-modules from a docker container, the docker daemon traditionally runs as root
, so files created fall into root:root
ownership.
My user has root privileges by proxy through that service, so even though I didn't sudo
anything, my git repository still had changes owned by root
.
I hope this helps someone, git outa here.
Intent intent = new Intent(this, classObject);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | IntentCompat.FLAG_ACTIVITY_CLEAR_TASK);
startActivity(intent);
This Will work for all Android versions. Where IntentCompat
the class added in Android Support library.
This was driving me bonkers as the .astype()
solution above didn't work for me. But I found another way. Haven't timed it or anything, but might work for others out there:
t1 = pd.to_datetime('1/1/2015 01:00')
t2 = pd.to_datetime('1/1/2015 03:30')
print pd.Timedelta(t2 - t1).seconds / 3600.0
...if you want hours. Or:
print pd.Timedelta(t2 - t1).seconds / 60.0
...if you want minutes.
The below code working for me on array coming from ajax call .
$form = $request->input('form');
$rules = array(
'facebook_account' => 'url',
'youtube_account' => 'url',
'twitter_account' => 'url',
'instagram_account' => 'url',
'snapchat_account' => 'url',
'website' => 'url',
);
$validation = Validator::make($form, $rules);
if ($validation->fails()) {
return Response::make(['error' => $validation->errors()], 400);
}
create a new package, drag and drop the class into it and now you are able to rename the new package
I found a solution that works exactly how I want.
I changed
$this->form_validation->set_rules('name', 'Name', 'trim|required');
$this->form_validation->set_rules('code', 'Code', 'trim|required');
$this->form_validation->set_rules('userfile', 'Document', 'required');
To
$this->form_validation->set_rules('name', 'Name', 'trim|required');
$this->form_validation->set_rules('code', 'Code', 'trim|required');
if (empty($_FILES['userfile']['name']))
{
$this->form_validation->set_rules('userfile', 'Document', 'required');
}
jsonify
prevents you from doing this in Flask 0.10 and lower for security reasons.
To do it anyway, just use json.dumps
in the Python standard library.
Use an interpolated string, this generates a rounded up string:
var strlen = 6;
$"{48.485:F2}"
Output
"48.49"
To get the functionality up and running:
adb.exe
(might need to start and stop ADB using adb kill-server
and adb start-server
)about:inspect
in Chrome on desktop, ensuring a Chrome browser is open on your deviceFollowing the above steps I got the RSA key fingerprint prompt to accept then I saw my device in Chrome.
Definitely not as easy as I thought it would have been but at least it now works.
Update 24 February 2016
So I updated to Windows 10 and now have a Samsung Galaxy S5, devices running Chrome v48.0.2564.116 m and v48.0.2564.95 respectively. Followed the steps from the Google docs and...it didn't work again, no RSA key prompt. So I began to follow my steps as above and thought there had to be a faster way as the Android SDK was over 1GB download.
This time I tried:
C:\Program Files (x86)\Minimal ADB and Fastboot\
adb devices
(alternatively I could have run adb start-server
but the prior gives a more informational response)Now, with Chrome open on my phone and chrome://inspect/
open on my desktop I can see the inspect options.
Next problem: I need to repeat the same steps each time I reboot Windows. To solve that issue:
"C:\Program Files (x86)\Minimal ADB and Fastboot\adb" devices
adb.bat
in the Windows Startup folder located at C:\ProgramData\Microsoft\Windows\Start Menu\Programs\StartUp
Note that the file does NOT need to be called adb.bat as long as it is a .bat file. The command you copied into the file has the default install path which you may need to alter for your set up.
Now I have the Chrome Inspect feature working when I need it.
Bit thanks and shout out to all others who have contributed their answers to this question which helped guide me towards a useful update to my answer. Please give credit to other answers where you find they have helped you too.
Here are helper functions which allow to convert digit in char to int and vice versa:
int toInt(char c) {
return c - '0';
}
char toChar(int i) {
return i + '0';
}
androidX users
Change your minSdkVersion to api level 21.
like this minSdkVersion 21
or build your app with compileSdkVersion 28
and also change targetSdkVersion
to targetSdkVersion 28
and you will see v7 error will gone. After that if you face a problem with creating Toolbar or other widget. press Alt+Enter and create a method for it.
You want to use postgresql's replace function:
replace(string text, from text, to text)
for instance :
UPDATE <table> SET <field> = replace(<field>, 'cat', 'dog')
Be aware, though, that this will be a string-to-string replacement, so 'category' will become 'dogegory'. the regexp_replace function may help you define a stricter match pattern for what you want to replace.
You're on a 64-bit system, and don't have 32-bit library support installed.
(if you don't use sudo in your setup read note below)
Most desktop Linux systems in the Fedora/Red Hat family:
pkcon install glibc.i686
Possibly some desktop Debian/Ubuntu systems?:
pkcon install ia32-libs
Fedora or newer Red Hat, CentOS:
sudo dnf install glibc.i686
Older RHEL, CentOS:
sudo yum install glibc.i686
Even older RHEL, CentOS:
sudo yum install glibc.i386
Debian or Ubuntu:
sudo apt-get install ia32-libs
should grab you the (first, main) library you need.
Anyone needing to install glibc.i686
or glibc.i386
will probably run into other library dependencies, as well. To identify a package providing an arbitrary library, you can use
ldd /usr/bin/YOURAPPHERE
if you're not sure it's in /usr/bin
you can also fall back on
ldd $(which YOURAPPNAME)
The output will look like this:
linux-gate.so.1 => (0xf7760000)
libpthread.so.0 => /lib/libpthread.so.0 (0xf773e000)
libSM.so.6 => not found
Check for missing libraries (e.g. libSM.so.6
in the above output), and for each one you need to find the package that provides it.
Fedora/Red Hat Enterprise/CentOS:
dnf provides /usr/lib/libSM.so.6
or, on older RHEL/CentOS:
yum provides /usr/lib/libSM.so.6
or, on Debian/Ubuntu:
first, install and download the database for apt-file
sudo apt-get install apt-file && apt-file update
then search with
apt-file find libSM.so.6
Note the prefix path /usr/lib
in the (usual) case; rarely, some libraries still live under /lib
for historical reasons … On typical 64-bit systems, 32-bit libraries live in /usr/lib
and 64-bit libraries live in /usr/lib64
.
(Debian/Ubuntu organise multi-architecture libraries differently.)
The above should give you a package name, e.g.:
libSM-1.2.0-2.fc15.i686 : X.Org X11 SM runtime library
Repo : fedora
Matched from:
Filename : /usr/lib/libSM.so.6
In this example the name of the package is libSM
and the name of the 32bit version of the package is libSM.i686
.
You can then install the package to grab the requisite library using pkcon
in a GUI, or sudo dnf/yum/apt-get
as appropriate…. E.g pkcon install libSM.i686
. If necessary you can specify the version fully. E.g sudo dnf install ibSM-1.2.0-2.fc15.i686
.
Some libraries will have an “epoch” designator before their name; this can be omitted (the curious can read the notes below).
Incidentially, the issue you are facing either implies that your RPM (resp. DPkg/DSelect) database is corrupted, or that the application you're trying to run wasn't installed through the package manager. If you're new to Linux, you probably want to avoid using software from sources other than your package manager, whenever possible...
Type
su -c
every time you see sudo
, eg,
su -c dnf install glibc.i686
The “epoch” designator before the name is an artifact of the way that the underlying RPM libraries handle version numbers; e.g.
2:libpng-1.2.46-1.fc16.i686 : A library of functions for manipulating PNG image format files
Repo : fedora
Matched from:
Filename : /usr/lib/libpng.so.3
Here, the 2:
can be omitted; just pkcon install libpng.i686
or sudo dnf install libpng-1.2.46-1.fc16.i686
. (It vaguely implies something like: at some point, the version number of the libpng
package rolled backwards, and the “epoch” had to be incremented to make sure the newer version would be considered “newer” during updates. Or something similar happened. Twice.)
Updated to clarify and cover the various package manager options more fully (March, 2016)
To make it short:
Node.js is well suited for applications that have a lot of concurrent connections and each request only needs very few CPU cycles, because the event loop (with all the other clients) is blocked during execution of a function.
A good article about the event loop in Node.js is Mixu's tech blog: Understanding the node.js event loop.
PLEASE do not use object as a class name:
public class MyObject //better to choose an appropriate name
{
string id;
DateTime date;
public string ID
{
get { return id; }
set { id = value; }
}
public DateTime Date
{
get { return date; }
set { date = value; }
}
}
You should implement INotifyPropertyChanged
for this class and of course call it on the Property setter. Otherwise changes are not reflected in your ui.
Your Viewmodel class/ dialogbox class should have a Property
of your MyObject
list. ObservableCollection<MyObject>
is the way to go:
public ObservableCollection<MyObject> MyList
{
get...
set...
}
In your xaml
you should set the Itemssource
to your collection of MyObject
. (the Datacontext
have to be your dialogbox class!)
<DataGrid ItemsSource="{Binding Source=MyList}" AutoGenerateColumns="False">
<DataGrid.Columns>
<DataGridTextColumn Header="ID" Binding="{Binding ID}"/>
<DataGridTextColumn Header="Date" Binding="{Binding Date}"/>
</DataGrid.Columns>
</DataGrid>
public class ForEachLoopExample {
public static void main(String[] args) {
System.out.println("For Each Loop Example: ");
int[] intArray = { 1,2,3,4,5 };
//Here iteration starts from index 0 to last index
for(int i : intArray)
System.out.println(i);
}
}
Try this
long start_time = System.nanoTime();
resp = GeoLocationService.getLocationByIp(ipAddress);
long end_time = System.nanoTime();
double difference = (end_time - start_time) / 1e6;
An old thread, but it may help someone like me. I resolved the issue by setting up SMTP server value to a legitimate value in PHP.ini
#!/bin/bash
kernel="2.6.39";
distro="xyz";
cat > /etc/myconfig.conf << EOL
line 1, ${kernel}
line 2,
line 3, ${distro}
line 4
line ...
EOL
this does what you want.
Do you want iteration? itertools.combinations. Common usage:
>>> import itertools
>>> itertools.combinations('abcd',2)
<itertools.combinations object at 0x01348F30>
>>> list(itertools.combinations('abcd',2))
[('a', 'b'), ('a', 'c'), ('a', 'd'), ('b', 'c'), ('b', 'd'), ('c', 'd')]
>>> [''.join(x) for x in itertools.combinations('abcd',2)]
['ab', 'ac', 'ad', 'bc', 'bd', 'cd']
If you just need to compute the formula, use math.factorial:
import math
def nCr(n,r):
f = math.factorial
return f(n) / f(r) / f(n-r)
if __name__ == '__main__':
print nCr(4,2)
In Python 3, use the integer division //
instead of /
to avoid overflows:
return f(n) // f(r) // f(n-r)
6
using $cfg['Servers'][$i]['auth_type'] = 'config';
is insecure i think.
using cookies with $cfg['Servers'][$i]['auth_type'] = 'cookie';
is better i think.
I also added:
$cfg['LoginCookieRecall'] = true;
$cfg['LoginCookieValidity'] = 100440;
$cfg['LoginCookieStore'] = 0; //Define how long login cookie should be stored in browser. Default 0 means that it will be kept for existing session. This is recommended for not trusted environments.
$cfg['LoginCookieDeleteAll'] = true; //If enabled (default), logout deletes cookies for all servers, otherwise only for current one. Setting this to false makes it easy to forget to log out from other server, when you are using more of them.
I added this in phi.ini
session.gc_maxlifetime=150000
An alternative to the answer provided by @Marc
SELECT SUBSTRING(LEFT(YOUR_FIELD, CHARINDEX('[', YOUR_FIELD) - 1), CHARINDEX(';', YOUR_FIELD) + 1, 100)
FROM YOUR_TABLE
WHERE CHARINDEX('[', YOUR_FIELD) > 0 AND
CHARINDEX(';', YOUR_FIELD) > 0;
This makes sure the delimiters exist, and solves an issue with the currently accepted answer where doing the LEFT last is working with the position of the last delimiter in the original string, rather than the revised substring.
There are two related error messages that may tell you something is wrong with declarations and/or imports.
The first is the one you are referring to, which can be generated by NOT putting an #import in your .m (or .pch file) while declaring an @class in your .h.
The second you might see, if you had a method in your States class like:
- (void)logout:(NSTimer *)timer
after adding the #import is this:
No visible @interface for "States" declares the selector 'logout:'
If you see this, you need to check and see if you declared your "logout" method (in this instance) in the .h file of the class you're importing or forwarding.
So in your case, you would need a:
- (void)logout:(NSTimer *)timer;
in your States class's .h to make one or both of these related errors disappear.
Check it out in this demo fiddle, go ahead and change the dropdown or default values in the code.
Setting the passenger.Title
with a value that equals to a title.Value
should work.
View:
<select [(ngModel)]="passenger.Title">
<option *ngFor="let title of titleArray" [value]="title.Value">
{{title.Text}}
</option>
</select>
TypeScript used:
class Passenger {
constructor(public Title: string) { };
}
class ValueAndText {
constructor(public Value: string, public Text: string) { }
}
...
export class AppComponent {
passenger: Passenger = new Passenger("Lord");
titleArray: ValueAndText[] = [new ValueAndText("Mister", "Mister-Text"),
new ValueAndText("Lord", "Lord-Text")];
}
I add in myApp.java, after @SpringBootApplication
@EnableAutoConfiguration(exclude = {DataSourceAutoConfiguration.class, DataSourceTransactionManagerAutoConfiguration.class, HibernateJpaAutoConfiguration.class})
And changed
@SpringBootApplication => @Configuration
So, I have this in my main class (myApp.java)
package br.com.company.project.app;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration;
import org.springframework.boot.autoconfigure.jdbc.DataSourceTransactionManagerAutoConfiguration;
import org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaAutoConfiguration;
import org.springframework.context.annotation.Configuration;
@Configuration
@EnableAutoConfiguration(exclude = {DataSourceAutoConfiguration.class, DataSourceTransactionManagerAutoConfiguration.class, HibernateJpaAutoConfiguration.class})
public class SomeApplication {
public static void main(String[] args) {
SpringApplication.run(SomeApplication.class, args);
}
}
And work for me! =)
label8.Text = "" + years.ToString("00") + " years";
when you want to send it to a label, or something, and you don't want any fractional component, this is the best way
label8.Text = "" + years.ToString("00.00") + " years";
if you want with only 2, and it's always like that
This will work:
DECLARE @MS INT = 235216
select cast(dateadd(ms, @MS, '00:00:00') AS TIME(3))
(where ms is just a number of seconds not a timeformat)
Original Answer
Windows Grep does this really well.
Edit: Windows Grep is no longer being maintained or made available by the developer. An alternate download link is here: Windows Grep - alternate
Current Answer
Visual Studio Code has excellent search and replace capabilities across files. It is extremely fast, supports regex and live preview before replacement.
Remove duplicate values from NSMutableArray in Objective-C
NSMutableArray *datelistArray = [[NSMutableArray alloc]init];
for (Student * data in fetchStudentDateArray)
{
if([datelistArray indexOfObject:data.date] == NSNotFound)
[datelistArray addObject:data.date];
}
You'd better create some class for each item instead of using anonymous objects. And in object you're serializing you should have array of those items. E.g.:
public class Item
{
public string name { get; set; }
public string index { get; set; }
public string optional { get; set; }
}
public class RootObject
{
public List<Item> items { get; set; }
}
Usage:
var objectToSerialize = new RootObject();
objectToSerialize.items = new List<Item>
{
new Item { name = "test1", index = "index1" },
new Item { name = "test2", index = "index2" }
};
And in the result you won't have to change things several times if you need to change data-structure.
p.s. Here's very nice tool for complex json
s
ListViewItem.IsSelected = true;
ListViewItem.Focus();
In my case there are no processes touching the file or directory. Maybe it happens if the path is very long, because an operating system restriction (windows). Try enabling the longpath support flag in the global git configuration as indicated below:
git config --global core.longpaths true
or try to setting the yes/no answer flag if it is not conflictive for you
set GIT_ASK_YESNO=false
If the path is too long, I've not found a successful solution.
To have access to stuff provided by math
module, like pi
. You need to import the module first:
import math
print (math.pi)
The S parameter does not do anything on its own.
/S Modifies the treatment of string after /C or /K (see below)
/C Carries out the command specified by string and then terminates
/K Carries out the command specified by string but remains
Try something like this instead
Call Shell("cmd.exe /S /K" & "perl a.pl c:\temp", vbNormalFocus)
You may not even need to add "cmd.exe" to this command unless you want a command window to open up when this is run. Shell should execute the command on its own.
Shell("perl a.pl c:\temp")
-Edit-
To wait for the command to finish you will have to do something like @Nate Hekman shows in his answer here
Dim wsh As Object
Set wsh = VBA.CreateObject("WScript.Shell")
Dim waitOnReturn As Boolean: waitOnReturn = True
Dim windowStyle As Integer: windowStyle = 1
wsh.Run "cmd.exe /S /C perl a.pl c:\temp", windowStyle, waitOnReturn
You Can simply Use One Jsp Page To accomplish the task.
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<%@page import="java.sql.*"%>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>JSP Page</title>
</head>
<body>
<%
String username=request.getParameter("user_name");
String password=request.getParameter("password");
String role=request.getParameter("role");
try
{
Class.forName("com.mysql.jdbc.Driver");
Connection con=DriverManager.getConnection("jdbc:mysql://localhost:3306/t_fleet","root","root");
Statement st=con.createStatement();
String query="select * from tbl_login where user_name='"+username+"' and password='"+password+"' and role='"+role+"'";
ResultSet rs=st.executeQuery(query);
while(rs.next())
{
session.setAttribute( "user_name",rs.getString(2));
session.setMaxInactiveInterval(3000);
response.sendRedirect("homepage.jsp");
}
%>
<%}
catch(Exception e)
{
out.println(e);
}
%>
</body>
I have use username, password and role to get into the system. One more thing to implement is you can do page permission checking through jsp and javascript function.
Create and edit the jupyter notebook config file with the following steps:
jupyter notebook --generate-config
notepad path_to_file/jupyter_notebook_config.py
to open it (change path_to_file
)#c.NotebookApp.browser = ''
to c.NotebookApp.browser = 'C:/Program Files (x86)/Google/Chrome/Application/chrome.exe %s'
Jupyter notebook will now use Chrome.
Check the daemon option in nginx.conf file. It has to be ON. Or you can simply rip out this line from config file. This option is fully described here http://nginx.org/en/docs/ngx_core_module.html#daemon
You can't follow the cursor with a DIV
, but you can draw a DIV
when moving the cursor!
$(document).on('mousemove', function(e){
$('#your_div_id').css({
left: e.pageX,
top: e.pageY
});
});
That div must be off the float, so position: absolute
should be set.
Best way to load local images in react is as follows
For example, Keep all your images(or any assets like videos, fonts) in the public folder as shown below.
Simply write <img src='/assets/images/Call.svg' />
to access the Call.svg image from any of your react component
Note: Keeping your assets in public folder ensures that, you can access it from anywhere from the project, by just giving '/path_to_image' and no need for any path traversal '../../' like this
INFORMATION_SCHEMA
is your friend. It has all kinds of views that show all kinds of schema information. Check your system views. You will find you have three views dealing with constraints, one being CHECK_CONSTRAINTS
.
As others have said, you are adding the same key more than once. If this is a NOT a valid scenario, then check Jdinklage Morgoone's answer (which only saves the first value found for a key), or, consider this workaround (which only saves the last value found for a key):
// This will always overwrite the existing value if one is already stored for this key
rct3Features[items[0]] = items[1];
Otherwise, if it is valid to have multiple values for a single key, then you should consider storing your values in a List<string>
for each string
key.
For example:
var rct3Features = new Dictionary<string, List<string>>();
var rct4Features = new Dictionary<string, List<string>>();
foreach (string line in rct3Lines)
{
string[] items = line.Split(new String[] { " " }, 2, StringSplitOptions.None);
if (!rct3Features.ContainsKey(items[0]))
{
// No items for this key have been added, so create a new list
// for the value with item[1] as the only item in the list
rct3Features.Add(items[0], new List<string> { items[1] });
}
else
{
// This key already exists, so add item[1] to the existing list value
rct3Features[items[0]].Add(items[1]);
}
}
// To display your keys and values (testing)
foreach (KeyValuePair<string, List<string>> item in rct3Features)
{
Console.WriteLine("The Key: {0} has values:", item.Key);
foreach (string value in item.Value)
{
Console.WriteLine(" - {0}", value);
}
}
What is Looper?
Looper is a class which is used to execute the Messages(Runnables) in a queue. Normal threads have no such queue, e.g. simple thread does not have any queue. It executes once and after method execution finishes, the thread will not run another Message(Runnable).
Where we can use Looper class?
If someone wants to execute multiple messages(Runnables) then he should use the Looper class which is responsible for creating a queue in the thread. For example, while writing an application that downloads files from the internet, we can use Looper class to put files to be downloaded in the queue.
How it works?
There is prepare()
method to prepare the Looper. Then you can use loop()
method to create a message loop in the current thread and now your Looper is ready to execute the requests in the queue until you quit the loop.
Here is the code by which you can prepare the Looper.
class LooperThread extends Thread {
public Handler mHandler;
@Override
public void run() {
Looper.prepare();
mHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
// process incoming messages here
}
};
Looper.loop();
}
}
The problem may be that ssh is trying to connect to all the different IPs that www.google.com
resolves to. For example on my machine:
# ssh -v -o ConnectTimeout=1 -o ConnectionAttempts=1 www.google.com
OpenSSH_5.9p1, OpenSSL 0.9.8t 18 Jan 2012
debug1: Connecting to www.google.com [173.194.43.20] port 22.
debug1: connect to address 173.194.43.20 port 22: Connection timed out
debug1: Connecting to www.google.com [173.194.43.19] port 22.
debug1: connect to address 173.194.43.19 port 22: Connection timed out
debug1: Connecting to www.google.com [173.194.43.18] port 22.
debug1: connect to address 173.194.43.18 port 22: Connection timed out
debug1: Connecting to www.google.com [173.194.43.17] port 22.
debug1: connect to address 173.194.43.17 port 22: Connection timed out
debug1: Connecting to www.google.com [173.194.43.16] port 22.
debug1: connect to address 173.194.43.16 port 22: Connection timed out
ssh: connect to host www.google.com port 22: Connection timed out
If I run it with a specific IP, it returns much faster.
EDIT: I've timed it (with time
) and the results are:
as a general way of working with Fragments, as JafarKhQ noted, you should not pass the params in the constructor but with a Bundle
.
the built-in method for that in the Fragment
class is setArguments(Bundle)
and getArguments()
.
basically, what you do is set up a bundle with all your Parcelable
items and send them on.
in turn, your Fragment will get those items in it's onCreate
and do it's magic to them.
the way shown in the DialogFragment
link was one way of doing this in a multi appearing fragment with one specific type of data and works fine most of the time, but you can also do this manually.
You can just substract two date objects.
var d1 = new Date(); //"now"
var d2 = new Date("2011/02/01") // some date
var diff = Math.abs(d1-d2); // difference in milliseconds
Note first of all that not all languages support it.
TCO applys to a special case of recursion. The gist of it is, if the last thing you do in a function is call itself (e.g. it is calling itself from the "tail" position), this can be optimized by the compiler to act like iteration instead of standard recursion.
You see, normally during recursion, the runtime needs to keep track of all the recursive calls, so that when one returns it can resume at the previous call and so on. (Try manually writing out the result of a recursive call to get a visual idea of how this works.) Keeping track of all the calls takes up space, which gets significant when the function calls itself a lot. But with TCO, it can just say "go back to the beginning, only this time change the parameter values to these new ones." It can do that because nothing after the recursive call refers to those values.
edit included the newer across()
syntax
Here's another tidyverse
solution, using filter(across())
or previously filter_at
. The advantage is that you can easily extend to more than one column.
Below also a solution with filter_all
in order to find the string in any column,
using diamonds
as example, looking for the string "V"
library(tidyverse)
# for only one column... extendable to more than one creating a column list in `across` or `vars`!
mtcars %>%
rownames_to_column("type") %>%
filter(across(type, ~ !grepl('Toyota|Mazda', .))) %>%
head()
#> type mpg cyl disp hp drat wt qsec vs am gear carb
#> 1 Datsun 710 22.8 4 108.0 93 3.85 2.320 18.61 1 1 4 1
#> 2 Hornet 4 Drive 21.4 6 258.0 110 3.08 3.215 19.44 1 0 3 1
#> 3 Hornet Sportabout 18.7 8 360.0 175 3.15 3.440 17.02 0 0 3 2
#> 4 Valiant 18.1 6 225.0 105 2.76 3.460 20.22 1 0 3 1
#> 5 Duster 360 14.3 8 360.0 245 3.21 3.570 15.84 0 0 3 4
#> 6 Merc 240D 24.4 4 146.7 62 3.69 3.190 20.00 1 0 4 2
The now superseded syntax for the same would be:
mtcars %>%
rownames_to_column("type") %>%
filter_at(.vars= vars(type), all_vars(!grepl('Toyota|Mazda',.)))
# remove all rows where any column contains 'V'
diamonds %>%
filter(across(everything(), ~ !grepl('V', .))) %>%
head
#> # A tibble: 6 x 10
#> carat cut color clarity depth table price x y z
#> <dbl> <ord> <ord> <ord> <dbl> <dbl> <int> <dbl> <dbl> <dbl>
#> 1 0.23 Ideal E SI2 61.5 55 326 3.95 3.98 2.43
#> 2 0.21 Premium E SI1 59.8 61 326 3.89 3.84 2.31
#> 3 0.31 Good J SI2 63.3 58 335 4.34 4.35 2.75
#> 4 0.3 Good J SI1 64 55 339 4.25 4.28 2.73
#> 5 0.22 Premium F SI1 60.4 61 342 3.88 3.84 2.33
#> 6 0.31 Ideal J SI2 62.2 54 344 4.35 4.37 2.71
The now superseded syntax for the same would be:
diamonds %>%
filter_all(all_vars(!grepl('V', .))) %>%
head
I tried to find an across alternative for the following, but I didn't immediately come up with a good solution:
#get all rows where any column contains 'V'
diamonds %>%
filter_all(any_vars(grepl('V',.))) %>%
head
#> # A tibble: 6 x 10
#> carat cut color clarity depth table price x y z
#> <dbl> <ord> <ord> <ord> <dbl> <dbl> <int> <dbl> <dbl> <dbl>
#> 1 0.23 Good E VS1 56.9 65 327 4.05 4.07 2.31
#> 2 0.290 Premium I VS2 62.4 58 334 4.2 4.23 2.63
#> 3 0.24 Very Good J VVS2 62.8 57 336 3.94 3.96 2.48
#> 4 0.24 Very Good I VVS1 62.3 57 336 3.95 3.98 2.47
#> 5 0.26 Very Good H SI1 61.9 55 337 4.07 4.11 2.53
#> 6 0.22 Fair E VS2 65.1 61 337 3.87 3.78 2.49
Update: Thanks to user Petr Kajzar in this answer, here also an approach for the above:
diamonds %>%
filter(rowSums(across(everything(), ~grepl("V", .x))) > 0)
I had similar problem, the solution for Windows looks the same (my Jenkins is installed on a Windows machine):
Global settings:
Go to Manage jenkins -> Configure System -> Git installations
add there the git exe path (for example: C:\Program Files\Git\bin\git.exe
), or you can use environment variable.
For Jenkins version 2.121.3, Go to Manage jenkins -> Global tool configuration -> Git installations -> Path to Git executable: C:\Program Files\Git\bin\git.exe
Jenkins job side:
Go to Source code Management -> select git, add your repository, choose connection to repository (http/ssh) and add credentials and it should work.
this can be achieved with the css calc()
operator
@media screen and (min-width: 480px) {
body {
background-color: lightgreen;
zoom:calc(100% / 480);
}
}
To hide the prompt set xls.DisplayAlerts = False
ConflictResolution
is not a true
or false
property, it should be xlLocalSessionChanges
Note that this has nothing to do with displaying the Overwrite prompt though!
Set xls = CreateObject("Excel.Application")
xls.DisplayAlerts = False
Set wb = xls.Workbooks.Add
fullFilePath = importFolderPath & "\" & "A.xlsx"
wb.SaveAs fullFilePath, AccessMode:=xlExclusive,ConflictResolution:=Excel.XlSaveConflictResolution.xlLocalSessionChanges
wb.Close (True)
There appear to be two problems.
I think you want the following regex @"([^a-zA-Z0-9\s])+"
Nowadays, it is the most efficient and comfortable to use lubridate and dplyr libraries.
lubridate
contains a number of functions that make parsing dates into POSIXct
or Date
objects easy. Here we use dmy
which automatically parses dates in Day, Month, Year
formats. Once your data is in a date format, you can sort it with dplyr::arrange
(or any other ordering function) as desired:
d$V3 <- lubridate::dmy(d$V3)
dplyr::arrange(d, V3)
Range("A1").value = Environ("Username")
This is better than Application.Username
, which doesn't always supply the Windows username. Thanks to Kyle for pointing this out.
Application Username
is the name of the User set in Excel > Tools > Options Environ("Username")
is the name you registered for Windows; see Control Panel >SystemIf you want a "Null, empty or white space" check, you can avoid unnecessary string manipulation with LTRIM
and RTRIM
like this.
IF COALESCE(PATINDEX('%[^ ]%', @parameter), 0) > 0
RAISERROR ...
Create a HttpRequestMessage
, set the Method to GET
, set your headers and then use SendAsync
instead of GetAsync
.
var client = new HttpClient();
var request = new HttpRequestMessage() {
RequestUri = new Uri("http://www.someURI.com"),
Method = HttpMethod.Get,
};
request.Headers.Accept.Add(new MediaTypeWithQualityHeaderValue("text/plain"));
var task = client.SendAsync(request)
.ContinueWith((taskwithmsg) =>
{
var response = taskwithmsg.Result;
var jsonTask = response.Content.ReadAsAsync<JsonObject>();
jsonTask.Wait();
var jsonObject = jsonTask.Result;
});
task.Wait();
You should be aware that values of fields could contain commas and quotation characters, so some of the suggested answers would not work, as the CSV output file would not be correct. To replace quotation characters in a field, and replace it with the double quotation character, you can use the REPLACE function that oracle provides, to change a single quote to double quote.
set echo off
set heading off
set feedback off
set linesize 1024 -- or some other value, big enough
set pagesize 50000
set verify off
set trimspool on
spool output.csv
select trim(
'"' || replace(col1, '"', '""') ||
'","' || replace(col2, '"', '""') ||
'","' || replace(coln, '"', '""') || '"' ) -- etc. for all the columns
from yourtable
/
spool off
Or, if you want the single quote character for the fields:
set echo off
set heading off
set feedback off
set linesize 1024 -- or some other value, big enough
set pagesize 50000
set verify off
set trimspool on
spool output.csv
select trim(
'"' || replace(col1, '''', '''''') ||
'","' || replace(col2, '''', '''''') ||
'","' || replace(coln, '''', '''''') || '"' ) -- etc. for all the columns
from yourtable
/
spool off
If you do <form action="identification" >
for your html form, data will be passed using 'Get' by default and hence you can catch this using doGet function in your java servlet code. This way data will be passed under the HTML header and hence will be visible in the URL when submitted.
On the other hand if you want to pass data in HTML body, then USE Post: <form action="identification" method="post">
and catch this data in doPost function. This was, data will be passed under the html body and not the html header, and you will not see the data in the URL after submitting the form.
Examples from my html:
<body>
<form action="StartProcessUrl" method="post">
.....
.....
Examples from my java servlet code:
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
PrintWriter out = response.getWriter();
String surname = request.getParameter("txtSurname");
String firstname = request.getParameter("txtForename");
String rqNo = request.getParameter("txtRQ6");
String nhsNo = request.getParameter("txtNHSNo");
String attachment1 = request.getParameter("base64textarea1");
String attachment2 = request.getParameter("base64textarea2");
.........
.........
I wanted to add this as a comment under Zoey Hewil's awesome answer above, but I don't currently have enough rep to do so, so I have to add it here and give credit for her work :P
If you're using Poshgit and are feeling exceptionally lazy, you can use the following to automatically extract your URL from your git config and make an easy job even easier. Standard caveats apply about testing this on a copy/backing up your local repo first in case it blows up in your face.
$config = get-content .git\config
$url = $config -match " url = (?<content>.*)"
$url = $url.trim().Substring(6)
$url
move-item -v .git .git_old;
git init;
git remote add origin "$url";
git fetch;
git reset origin/master --mixed
The ISO C99 standard specifies that these macros must only be defined if explicitly requested.
#define __STDC_FORMAT_MACROS
#include <inttypes.h>
... now PRIu64 will work
The control searches for a view in the following order:
As you do not have xxx.cshtml
in those locations, it returns a "view not found" error.
Solution: You can use the complete path of your view:
Like
PartialView("~/views/ABC/XXX.cshtml", zyxmodel);
Firstly said, I try to force all my users to use Chrome when printing because other browsers create different layouts.
An answer from this question recommends:
@page {
size: 210mm 297mm;
/* Chrome sets own margins, we change these printer settings */
margin: 27mm 16mm 27mm 16mm;
}
However, I ended up using this CSS for all my pages to be printed:
@media print
{
@page {
size: A4; /* DIN A4 standard, Europe */
margin:0;
}
html, body {
width: 210mm;
/* height: 297mm; */
height: 282mm;
font-size: 11px;
background: #FFF;
overflow:visible;
}
body {
padding-top:15mm;
}
}
Special case: Long Tables
When I needed to print a table over several pages, the margin:0
with the @page
was leading to bleeding edges:
I could solve this thanks to this answer with:
table { page-break-inside:auto }
tr { page-break-inside:avoid; page-break-after:auto }
thead { display:table-header-group; }
tfoot { display:table-footer-group; }
Plus setting the top-bottom-margins for @page
:
@page {
size: auto;
margin: 20mm 0 10mm 0;
}
body {
margin:0;
padding:0;
}
Result:
I would rather prefer a solution that is concise and works with all browser. For now, I hope the information above can help some developers with similar issues.
Double check your jQuery references. It is possible that you are either referencing it more than once or you are calling your function too early (before jQuery is defined). You can try as mentioned in my comments and put any jQuery reference at the top of your file (in the head) and see if that helps.
If you use the encapsulation of jQuery it shouldn't help in this case. Please try it because I think it is prettier and more obvious, but if jQuery is not defined you will get the same errors.
In the end... jQuery is not currently defined.
Not everyone will find it simple, but I believe this to be the best way to go around it:
preg_match('/^[^\?]+/', $_SERVER['REQUEST_URI'], $return);
$url = 'http' . ('on' === $_SERVER['HTTPS'] ? 's' : '') . '://' . $_SERVER['HTTP_HOST'] . $return[0]
What is does is simply to go through the REQUEST_URI from the beginning of the string, then stop when it hits a "?" (which really, only should happen when you get to parameters).
Then you create the url and save it to $url:
When creating the $url... What we're doing is simply writing "http" then checking if https is being used, if it is, we also write "s", then we concatenate "://", concatenate the HTTP_HOST (the server, fx: "stackoverflow.com"), and concatenate the $return, which we found before, to that (it's an array, but we only want the first index in it... There can only ever be one index, since we're checking from the beginning of the string in the regex.).
I hope someone can use this...
PS. This has been confirmed to work while using SLIM to reroute the URL.
Just to be complete, C++
#include <iostream>
#include <algorithm>
#include <string>
std::string theSeq = "abc";
do
{
std::cout << theSeq << endl;
}
while (std::next_permutation(theSeq.begin(), theSeq.end()));
...
abc
acb
bac
bca
cab
cba
If you have numerical and categorical both type of data in dataframe You can use : here X is my dataframe having categorical and numerical both variables
from sklearn import preprocessing
le = preprocessing.LabelEncoder()
for i in range(0,X.shape[1]):
if X.dtypes[i]=='object':
X[X.columns[i]] = le.fit_transform(X[X.columns[i]])
Note: This technique is good if you are not interested in converting them back.
You can use hablar::convert
if you have a data frame. The syntax is easy:
Sample df
library(hablar)
library(dplyr)
df <- dplyr::tibble(a = as.factor(c("7", "3")),
b = as.factor(c("1.5", "6.3")))
Solution
df %>%
convert(num(a, b))
gives you:
# A tibble: 2 x 2
a b
<dbl> <dbl>
1 7. 1.50
2 3. 6.30
Or if you want one column to be integer and one numeric:
df %>%
convert(int(a),
num(b))
results in:
# A tibble: 2 x 2
a b
<int> <dbl>
1 7 1.50
2 3 6.30
I ran into a similar issue today - my ruby version didn't match my rvm installs.
> ruby -v
ruby 2.0.0p481
> rvm list
rvm rubies
ruby-2.1.2 [ x86_64 ]
=* ruby-2.2.1 [ x86_64 ]
ruby-2.2.3 [ x86_64 ]
Also, rvm current
failed.
> rvm current
Warning! PATH is not properly set up, '/Users/randallreed/.rvm/gems/ruby-2.2.1/bin' is not at first place...
The error message recommended this useful command, which resolved the issue for me:
> rvm get stable --auto-dotfiles
Every time I Google how to do this I end up reading this same thread, but it doesn't get me where I need to be, so hopefully this will help my future self and others too.
I started a new local project that I want to push to my repo (BitBucket). Here is what I did:
git init
git add .
git commit -m "Initial commit"
new_project
git remote add origin [email protected]:AndrewFox/new_project.git
git push origin master -f
The -f
flag is to force the push, otherwise it will identify that the two repo's are different and fail.
Position your <div>
absolutely at the bottom and don't forget to give div.A
a position: relative
- http://jsfiddle.net/TTaMx/
.A {
position: relative;
margin: 40px 0;
height: 40px;
width: 200px;
background: #eee;
}
.A:after {
content: " ";
display: block;
background: #c00;
height: 29px;
width: 100%;
position: absolute;
bottom: -29px;
}?
I like to use GVM for managing my Go versions in my Ubuntu box. Pretty simple to use, and if you're familiar with RVM, it's a nobrainer. It allows you to have multiple versions of Go installed in your system and switch between whichever version you want at any point in time.
Install GVM with:
sudo apt-get install bison mercurial
bash < <(curl -LSs 'https://raw.githubusercontent.com/moovweb/gvm/master/binscripts/gvm-installer')
. "$HOME/.gvm/scripts/gvm"
and then it's as easy as doing this:
gvm install go1.1.1
gvm use go1.1.1 --default
The default flag at the end of the second command will set go1.1.1 to be your default Go version whenever you start a new terminal session.
The Microsoft Azure official documentation for running Flask Apps on Azure App Services (Linux App) states the use of timeout as 600
gunicorn --bind=0.0.0.0 --timeout 600 application:app
https://docs.microsoft.com/en-us/azure/app-service/configure-language-python#flask-app
From the C# language specification (PDF page 287 - or 300th page of the PDF):
Even though constants are considered static members, a constant declaration neither requires nor allows a static modifier.
My view templates are generally .php files. This is what I would be using for now.
<?php // Some comment here ?>
The solution is quite similar to what @Robert suggested, works for me. Is not very clean I guess.
For python 3 pip install urllib
find the utils.py
in %PYTHON_HOME%\Lib\site-packages\solrcloudpy\utils.py
change the import urlparse
to
from urllib import parse as urlparse
Vi or Vim?
Anyway, the following command works for Vim in 'nocompatible' mode. That is, I suppose, almost pure vi.
:join!
If you want to do it from normal command use
gJ
With 'gJ' you join lines as is -- without adding or removing whitespaces:
S<Switch_ID>_F<File type>
_ID<ID number>_T<date+time>_O<Original File name>.DAT
Result:
S<Switch_ID>_F<File type>_ID<ID number>_T<date+time>_O<Original File name>.DAT
With 'J' command you will have:
S<Switch_ID>_F<File type> _ID<ID number>_T<date+time>_O<Original File name>.DAT
Note space between type>
and _ID
.
The instanceof
keyword, as described by the other answers, is usually what you would want.
Keep in mind that instanceof
will return true
for superclasses as well.
If you want to see if an object is a direct instance of a class, you could compare the class. You can get the class object of an instance via getClass()
. And you can statically access a specific class via ClassName.class
.
So for example:
if (a.getClass() == X.class) {
// do something
}
In the above example, the condition is true if a
is an instance of X
, but not if a
is an instance of a subclass of X
.
In comparison:
if (a instanceof X) {
// do something
}
In the instanceof
example, the condition is true if a
is an instance of X
, or if a
is an instance of a subclass of X
.
Most of the time, instanceof
is right.
I've spent a day on trying to put all the pieces together, been in hundreds of sites and tutorials, but they all skip trivial steps.
So here's the full guide:
New Project:
C:\Program Files\Java\jdk{version}
C:\Program Files\Android\android-sdk-windows
.Compiling:
I wanted a solution that would have the following:
Here is the way that I do it:
export class Person {
id!: number;
firstName!: string;
lastName!: string;
getFullName() {
return `${this.firstName} ${this.lastName}`;
}
constructor(data: OnlyData<Person>) {
Object.assign(this, data);
}
}
const person = new Person({ id: 5, firstName: "John", lastName: "Doe" });
person.getFullName();
All the properties in the constructor are mandatory and may not be omitted without a compiler error.
It is dependant on the OnlyData
that filters out getFullName()
out of the required properties and it is defined like so:
// based on : https://medium.com/dailyjs/typescript-create-a-condition-based-subset-types-9d902cea5b8c
type FilterFlags<Base, Condition> = { [Key in keyof Base]: Base[Key] extends Condition ? never : Key };
type AllowedNames<Base, Condition> = FilterFlags<Base, Condition>[keyof Base];
type SubType<Base, Condition> = Pick<Base, AllowedNames<Base, Condition>>;
type OnlyData<T> = SubType<T, (_: any) => any>;
Current limitations of this way:
When you use useState
, you can get an update method for the state item:
const [theArray, setTheArray] = useState(initialArray);
then, when you want to add a new element, you use that function and pass in the new array or a function that will create the new array. Normally the latter, since state updates are asynchronous and sometimes batched:
setTheArray(oldArray => [...oldArray, newElement]);
Sometimes you can get away without using that callback form, if you only update the array in handlers for certain specific user events like click
(but not like mousemove
):
setTheArray([...theArray, newElement]);
The events for which React ensures that rendering is flushed are the "discrete events" listed here.
Live Example (passing a callback into setTheArray
):
const {useState, useCallback} = React;
function Example() {
const [theArray, setTheArray] = useState([]);
const addEntryClick = () => {
setTheArray(oldArray => [...oldArray, `Entry ${oldArray.length}`]);
};
return [
<input type="button" onClick={addEntryClick} value="Add" />,
<div>{theArray.map(entry =>
<div>{entry}</div>
)}
</div>
];
}
ReactDOM.render(
<Example />,
document.getElementById("root")
);
_x000D_
<div id="root"></div>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/16.8.1/umd/react.production.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/16.8.1/umd/react-dom.production.min.js"></script>
_x000D_
Because the only update to theArray
in there is the one in a click
event (one of the "discrete" events), I could get away with a direct update in addEntry
:
const {useState, useCallback} = React;
function Example() {
const [theArray, setTheArray] = useState([]);
const addEntryClick = () => {
setTheArray([...theArray, `Entry ${theArray.length}`]);
};
return [
<input type="button" onClick={addEntryClick} value="Add" />,
<div>{theArray.map(entry =>
<div>{entry}</div>
)}
</div>
];
}
ReactDOM.render(
<Example />,
document.getElementById("root")
);
_x000D_
<div id="root"></div>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/16.8.1/umd/react.production.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/16.8.1/umd/react-dom.production.min.js"></script>
_x000D_
Views are handy when you need to select from several tables, or just to get a subset of a table.
You should design your tables in such a way that your database is well normalized (minimum duplication). This can make querying somewhat difficult.
Views are a bit of separation, allowing you to view the data in the tables differently than they are stored.
just to toss it out for posterity: it can sometimes be preferable to generate a random string using an initial character set string. This is useful if the string is supposed to be entered manually by a human; excluding 0, O, 1, and l can help reduce user error.
var alpha = "abcdefghijkmnpqrstuvwxyzABCDEFGHJKLMNPQRSTUVWXYZ23456789"
// generates a random string of fixed size
func srand(size int) string {
buf := make([]byte, size)
for i := 0; i < size; i++ {
buf[i] = alpha[rand.Intn(len(alpha))]
}
return string(buf)
}
and I typically set the seed inside of an init()
block. They're documented here: http://golang.org/doc/effective_go.html#init
The code on Scene delegate in Swift UI
Content view background-color
window.rootViewController?.view.backgroundColor = .lightGray
Now, adding view-source:
before the site-address.com works on Chrome - Android.
Source: https://www.quora.com/How-can-I-view-a-webpage-source-code-in-Google-chrome-mobile-version
<center>
<h3 > your div goes here!</h3>
</center>
find
will find all files that match a pattern:
find . -name "*foo"
However, if you want a picture:
tree -P "*foo"
Hope this helps!
Here is a possible solution the solution #3 on my comments to blubill's answer:
yourscript.php
========================
<?php
$dir = '/home/user/Pictures';
$file_display = array('jpg', 'jpeg', 'png', 'gif');
if (file_exists($dir) == false)
{
echo 'Directory "', $dir, '" not found!';
}
else
{
$dir_contents = scandir($dir);
foreach ($dir_contents as $file)
{
$file_type = strtolower(end(explode('.', $file)));
if ($file !== '.' && $file !== '..' && in_array($file_type, $file_display) == true)
{
$name = basename($file);
echo "<img src='img.php?name={$name}' />";
}
}
}
?>
img.php
========================
<?php
$name = $_GET['name'];
$mimes = array
(
'jpg' => 'image/jpg',
'jpeg' => 'image/jpg',
'gif' => 'image/gif',
'png' => 'image/png'
);
$ext = strtolower(end(explode('.', $name)));
$file = '/home/users/Pictures/'.$name;
header('content-type: '. $mimes[$ext]);
header('content-disposition: inline; filename="'.$name.'";');
readfile($file);
?>
Unless you have a good reason, in your root controller do this:
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(onTheEvent:)
name:@"ABCMyEvent"
object:nil];
And when you want to notify it:
[[NSNotificationCenter defaultCenter] postNotificationName:@"ABCMyEvent"
object:self];
Control Panel >> Windows Firewall >> Turn windows firewall on or off >> Turn off.
Advanced settings >> Domain profile >> Windows firewall properties >> Firewall status >> Off.
Winston is a pretty good logging library. You can write logs out to a file using it.
Code would look something like:
var winston = require('winston');
var logger = new (winston.Logger)({
transports: [
new (winston.transports.Console)({ json: false, timestamp: true }),
new winston.transports.File({ filename: __dirname + '/debug.log', json: false })
],
exceptionHandlers: [
new (winston.transports.Console)({ json: false, timestamp: true }),
new winston.transports.File({ filename: __dirname + '/exceptions.log', json: false })
],
exitOnError: false
});
module.exports = logger;
You can then use this like:
var logger = require('./log');
logger.info('log to file');
Enable Microsoft ActiveX Data Objects 2.8 Library
Dim oConn As ADODB.Connection
Private Sub ConnectDB()
Set oConn = New ADODB.Connection
oConn.Open "DRIVER={MySQL ODBC 5.1 Driver};" & _
"SERVER=localhost;" & _
"DATABASE=yourdatabase;" & _
"USER=yourdbusername;" & _
"PASSWORD=yourdbpassword;" & _
"Option=3"
End Sub
There rest is here: http://www.heritage-tech.net/908/inserting-data-into-mysql-from-excel-using-vba/
I tried all the solutions, but did not work. Wanted to run long running tasks with Celery but for these I needed to run sudo chown command with subprocess.call().
This is what worked for me:
To add safe environment variables, in command line, type:
export MY_SUDO_PASS="user_password_here"
To test if it's working type:
echo $MY_SUDO_PASS
> user_password_here
To run it at system startup add it to the end of this file:
nano ~/.bashrc
#.bashrc
...
existing_content:
elif [ -f /etc/bash_completion ]; then
. /etc/bash_completion
fi
fi
...
export MY_SUDO_PASS="user_password_here"
You can add all your environment variables passwords, usernames, host, etc here later.
If your variables are ready you can run:
To update:
echo $MY_SUDO_PASS | sudo -S apt-get update
Or to install Midnight Commander
echo $MY_SUDO_PASS | sudo -S apt-get install mc
To start Midnight Commander with sudo
echo $MY_SUDO_PASS | sudo -S mc
Or from python shell (or Django/Celery), to change directory ownership recursively:
python
>> import subprocess
>> subprocess.call('echo $MY_SUDO_PASS | sudo -S chown -R username_here /home/username_here/folder_to_change_ownership_recursivley', shell=True)
Hope it helps.
use below code it helps you....
BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = 4;
options.inPurgeable = true;
Bitmap bm = BitmapFactory.decodeFile("your path of image",options);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
bm.compress(Bitmap.CompressFormat.JPEG,40,baos);
// bitmap object
byteImage_photo = baos.toByteArray();
//generate base64 string of image
String encodedImage =Base64.encodeToString(byteImage_photo,Base64.DEFAULT);
//send this encoded string to server
Following the answer from this issue, you must call Menu.setApplicationMenu(null)
before the window is created
AutopostBack is a property which you assign to web controls if you want to post back the page when any event occurs at them.
You may see this article: What is AutoPostBack?
Autopostback is the mechanism, by which the page will be posted back to the server automatically based on some events in the web controls. In some of the web controls, the property called auto post back, which if set to true, will send the request to the server when an event happens in the control
For example, TextBox has AutoPostBack property
Use the AutoPostBack property to specify whether an automatic postback to the server will occur when the TextBox control loses focus. Pressing the ENTER or the TAB key while in the TextBox control is the most common way to change focus.
how about this solution? I didn't see anything like this in my search. I am trying to avoid division and make solution simpler.
struct timeval cur_time1, cur_time2, tdiff;
gettimeofday(&cur_time1,NULL);
sleep(1);
gettimeofday(&cur_time2,NULL);
tdiff.tv_sec = cur_time2.tv_sec - cur_time1.tv_sec;
tdiff.tv_usec = cur_time2.tv_usec + (1000000 - cur_time1.tv_usec);
while(tdiff.tv_usec > 1000000)
{
tdiff.tv_sec++;
tdiff.tv_usec -= 1000000;
printf("updated tdiff tv_sec:%ld tv_usec:%ld\n",tdiff.tv_sec, tdiff.tv_usec);
}
printf("end tdiff tv_sec:%ld tv_usec:%ld\n",tdiff.tv_sec, tdiff.tv_usec);
The enumerate function works as follows:
doc = """I like movie. But I don't like the cast. The story is very nice"""
doc1 = doc.split('.')
for i in enumerate(doc1):
print(i)
The output is
(0, 'I like movie')
(1, " But I don't like the cast")
(2, ' The story is very nice')
+=
is the in-place addition operator.
It's the same as doing cnt = cnt + 1
. For example:
>>> cnt = 0
>>> cnt += 2
>>> print cnt
2
>>> cnt += 42
>>> print cnt
44
The operator is often used in a similar fashion to the ++
operator in C-ish languages, to increment a variable by one in a loop (i += 1
)
There are similar operator for subtraction/multiplication/division/power and others:
i -= 1 # same as i = i - 1
i *= 2 # i = i * 2
i /= 3 # i = i / 3
i **= 4 # i = i ** 4
The +=
operator also works on strings, for example:
>>> s = "Hi"
>>> s += " there"
>>> print s
Hi there
People tend to recommend against doing this for performance reason, but for the most scripts this really isn't an issue. To quote from the "Sequence Types" docs:
- If s and t are both strings, some Python implementations such as CPython can usually perform an in-place optimization for assignments of the form s=s+t or s+=t. When applicable, this optimization makes quadratic run-time much less likely. This optimization is both version and implementation dependent. For performance sensitive code, it is preferable to use the str.join() method which assures consistent linear concatenation performance across versions and implementations.
The str.join() method refers to doing the following:
mysentence = []
for x in range(100):
mysentence.append("test")
" ".join(mysentence)
..instead of the more obvious:
mysentence = ""
for x in range(100):
mysentence += " test"
The problem with the later is (aside from the leading-space), depending on the Python implementation, the Python interpreter will have to make a new copy of the string in memory every time you append (because strings are immutable), which will get progressively slower the longer the string to append is.. Whereas appending to a list then joining it together into a string is a consistent speed (regardless of implementation)
If you're doing basic string manipulation, don't worry about it. If you see a loop which is basically just appending to a string, consider constructing an array, then "".join()
'ing it.
If you are using Swift, the Just library does this for you. Example from it's readme file:
// talk to registration end point
Just.post(
"http://justiceleauge.org/member/register",
data: ["username": "barryallen", "password":"ReverseF1ashSucks"],
files: ["profile_photo": .URL(fileURLWithPath:"flash.jpeg", nil)]
) { (r)
if (r.ok) { /* success! */ }
}
To get the maximum value of an unsigned integer type t
whose width is at least the one of unsigned int
(otherwise one gets problems with integer promotions): ~(t) 0
. If one wants to also support shorter types, one can add another cast: (t) ~(t) 0
.
If the integer type t
is signed, assuming that there are no padding bits, one can use:
((((t) 1 << (sizeof(t) * CHAR_BIT - 2)) - 1) * 2 + 1)
The advantage of this formula is that it is not based on some unsigned version of t
(or a larger type), which may be unknown or unavailable (even uintmax_t
may not be sufficient with non-standard extensions). Example with 6 bits (not possible in practice, just for readability):
010000 (t) 1 << (sizeof(t) * CHAR_BIT - 2)
001111 - 1
011110 * 2
011111 + 1
In two's complement, the minimum value is the opposite of the maximum value, minus 1 (in the other integer representations allowed by the ISO C standard, this is just the opposite of the maximum value).
Note: To detect signedness in order to decide which version to use: (t) -1 < 0
will work with any integer representation, giving 1 (true) for signed integer types and 0 (false) for unsigned integer types. Thus one can use:
(t) -1 < 0 ? ((((t) 1 << (sizeof(t) * CHAR_BIT - 2)) - 1) * 2 + 1) : (t) ~(t) 0
Use libcurl, here is a simple example.
EDIT: If this is about starting a web browser from C++, you can invoke a shell command with system
on a POSIX system:
system("<mybrowser> http://google.com");
By replacing <mybrowser>
with the browser you want to launch.
Run this command to show ip4 and ip6:
ifconfig eth0 | grep inet | awk '{print $2}' | cut -d/ -f1
select sum(rsp_ind = 0) as `New`,
sum(rsp_ind = 1) as `Accepted`
from tb_a
No, use transparent
instead none
. See working example here in this example if you will change transparent
to none
it will not work
use like .class { background-color:transparent; }
To avoid exceptions killing your app you should catch those exceptions and treat them the way you wish, defining the behavior for you app on those situations where the id is not found.
begin
current_user.comments.find(ids)
rescue
#do something in case of exception found
end
Here's more info on exceptions in ruby.
Instead of adding and removing callbacks manually and having a bunch of delegate types declared everywhere:
// The hard way
public delegate void ObjectCallback(ObjectType broadcaster);
public class Object
{
public event ObjectCallback m_ObjectCallback;
void SetupListener()
{
ObjectCallback callback = null;
callback = (ObjectType broadcaster) =>
{
// one time logic here
broadcaster.m_ObjectCallback -= callback;
};
m_ObjectCallback += callback;
}
void BroadcastEvent()
{
m_ObjectCallback?.Invoke(this);
}
}
You could try this generic approach:
public class Object
{
public Broadcast<Object> m_EventToBroadcast = new Broadcast<Object>();
void SetupListener()
{
m_EventToBroadcast.SubscribeOnce((ObjectType broadcaster) => {
// one time logic here
});
}
~Object()
{
m_EventToBroadcast.Dispose();
m_EventToBroadcast = null;
}
void BroadcastEvent()
{
m_EventToBroadcast.Broadcast(this);
}
}
public delegate void ObjectDelegate<T>(T broadcaster);
public class Broadcast<T> : IDisposable
{
private event ObjectDelegate<T> m_Event;
private List<ObjectDelegate<T>> m_SingleSubscribers = new List<ObjectDelegate<T>>();
~Broadcast()
{
Dispose();
}
public void Dispose()
{
Clear();
System.GC.SuppressFinalize(this);
}
public void Clear()
{
m_SingleSubscribers.Clear();
m_Event = delegate { };
}
// add a one shot to this delegate that is removed after first broadcast
public void SubscribeOnce(ObjectDelegate<T> del)
{
m_Event += del;
m_SingleSubscribers.Add(del);
}
// add a recurring delegate that gets called each time
public void Subscribe(ObjectDelegate<T> del)
{
m_Event += del;
}
public void Unsubscribe(ObjectDelegate<T> del)
{
m_Event -= del;
}
public void Broadcast(T broadcaster)
{
m_Event?.Invoke(broadcaster);
for (int i = 0; i < m_SingleSubscribers.Count; ++i)
{
Unsubscribe(m_SingleSubscribers[i]);
}
m_SingleSubscribers.Clear();
}
}
It means
myclass *p = NULL;
*p = ...; // illegal: dereferencing NULL pointer
... = *p; // illegal: dereferencing NULL pointer
p->meth(); // illegal: equivalent to (*p).meth(), which is dereferencing NULL pointer
myclass *p = /* some legal, non-NULL pointer */;
*p = ...; // Ok
... = *p; // Ok
p->meth(); // Ok, if myclass::meth() exists
basically, almost anything involving (*p)
or implicitly involving (*p)
, e.g. p->...
which is a shorthand for (*p). ...
; except for pointer declaration.
Double quotes are interpreted as literals in regex; they are not special characters. You are trying to match a literal "||"
.
Just use Pattern.quote(delimiter)
:
As requested, here's a line of code (same as Sanjay's)
final String[] tokens = line.split(Pattern.quote(delimiter));
If that doesn't work, you're not passing in the correct delimiter.
For adhoc queries:
Show results in grid mode (CTRL+D), run query, click top left hand box in results grid, paste to Excel, save as CSV. You may be able to paste directly into a text file (can't try it now)
Or "Results to file" has options too for CSV
Or "Results to text" with comma separators
All settings under Tool..Options and Query.. options (I think, can't check) too
Forgot to relate to the first code snippet. I wouldn't use forEach
at all. Since you are collecting the elements of the Stream
into a List
, it would make more sense to end the Stream
processing with collect
. Then you would need peek
in order to set the ID.
List<Entry> updatedEntries =
entryList.stream()
.peek(e -> e.setTempId(tempId))
.collect (Collectors.toList());
For the second snippet, forEach
can execute multiple expressions, just like any lambda expression can :
entryList.forEach(entry -> {
if(entry.getA() == null){
printA();
}
if(entry.getB() == null){
printB();
}
if(entry.getC() == null){
printC();
}
});
However (looking at your commented attempt), you can't use filter in this scenario, since you will only process some of the entries (for example, the entries for which entry.getA() == null
) if you do.
You can filter the results based on formatted date using mysql (See here for Mysql/Mariadb help) and use something like this in laravel-5.4:
Model::selectRaw("COUNT(*) views, DATE_FORMAT(created_at, '%Y %m %e') date")
->groupBy('date')
->get();
In this case a relatively simple GROUP BY
can work, but in general, when there are additional columns where you can't order by but you want them from the particular row which they are associated with, you can either join back to the detail using all the parts of the key or use OVER()
:
Runnable example (Wofkflow20 error in original data corrected)
;WITH partitioned AS (
SELECT company
,workflow
,date
,other_columns
,ROW_NUMBER() OVER(PARTITION BY company, workflow
ORDER BY date) AS seq
FROM workflowTable
)
SELECT *
FROM partitioned WHERE seq = 1
you want this?
employees.ForEach(emp =>
{
collection.AddRange(emp.Departments.Where(dept => { dept.SomeProperty = null; return true; }));
});
Documentation for crypto: http://nodejs.org/api/crypto.html
const crypto = require('crypto')
const text = 'I love cupcakes'
const key = 'abcdeg'
crypto.createHmac('sha1', key)
.update(text)
.digest('hex')
On 32-bit machines:
cd C:\Windows\System32
regsvr32 mscomctl.ocx
regtlib msdatsrc.tlb
or on 64 bit machines:
cd C:\Windows\SysWOW64
regsvr32 mscomctl.ocx
regtlib msdatsrc.tlb
These need to be run as administrator.
HTTPS proxy doesn't make sense because you can't terminate your HTTP connection at the proxy for security reasons. With your trust policy, it might work if the proxy server has a HTTPS port. Your error is caused by connecting to HTTP proxy port with HTTPS.
You can connect through a proxy using SSL tunneling (many people call that proxy) using proxy CONNECT command. However, Java doesn't support newer version of proxy tunneling. In that case, you need to handle the tunneling yourself. You can find sample code here,
http://www.javaworld.com/javaworld/javatips/jw-javatip111.html
EDIT: If you want defeat all the security measures in JSSE, you still need your own TrustManager. Something like this,
public SSLTunnelSocketFactory(String proxyhost, String proxyport){
tunnelHost = proxyhost;
tunnelPort = Integer.parseInt(proxyport);
dfactory = (SSLSocketFactory)sslContext.getSocketFactory();
}
...
connection.setSSLSocketFactory( new SSLTunnelSocketFactory( proxyHost, proxyPort ) );
connection.setDefaultHostnameVerifier( new HostnameVerifier()
{
public boolean verify( String arg0, SSLSession arg1 )
{
return true;
}
} );
EDIT 2: I just tried my program I wrote a few years ago using SSLTunnelSocketFactory and it doesn't work either. Apparently, Sun introduced a new bug sometime in Java 5. See this bug report,
http://bugs.sun.com/view_bug.do?bug_id=6614957
The good news is that the SSL tunneling bug is fixed so you can just use the default factory. I just tried with a proxy and everything works as expected. See my code,
public class SSLContextTest {
public static void main(String[] args) {
System.setProperty("https.proxyHost", "proxy.xxx.com");
System.setProperty("https.proxyPort", "8888");
try {
SSLContext sslContext = SSLContext.getInstance("SSL");
// set up a TrustManager that trusts everything
sslContext.init(null, new TrustManager[] { new X509TrustManager() {
public X509Certificate[] getAcceptedIssuers() {
System.out.println("getAcceptedIssuers =============");
return null;
}
public void checkClientTrusted(X509Certificate[] certs,
String authType) {
System.out.println("checkClientTrusted =============");
}
public void checkServerTrusted(X509Certificate[] certs,
String authType) {
System.out.println("checkServerTrusted =============");
}
} }, new SecureRandom());
HttpsURLConnection.setDefaultSSLSocketFactory(
sslContext.getSocketFactory());
HttpsURLConnection
.setDefaultHostnameVerifier(new HostnameVerifier() {
public boolean verify(String arg0, SSLSession arg1) {
System.out.println("hostnameVerifier =============");
return true;
}
});
URL url = new URL("https://www.verisign.net");
URLConnection conn = url.openConnection();
BufferedReader reader =
new BufferedReader(new InputStreamReader(conn.getInputStream()));
String line;
while ((line = reader.readLine()) != null) {
System.out.println(line);
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
This is what I get when I run the program,
checkServerTrusted =============
hostnameVerifier =============
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
......
As you can see, both SSLContext and hostnameVerifier are getting called. HostnameVerifier is only involved when the hostname doesn't match the cert. I used "www.verisign.net" to trigger this.
I add credentials for HttpWebRequest
.
myReq.UseDefaultCredentials = true;
myReq.PreAuthenticate = true;
myReq.Credentials = CredentialCache.DefaultCredentials;
The way that I do this is with GroovyShell
.
GroovyShell shell = new GroovyShell()
def Util = shell.parse(new File('Util.groovy'))
def data = Util.fetchData()
What worked for me was copping the .settings/ directory from another project.
If you're trying to take advantage of polymorphic behavior, you need to ensure that the methods visible to outside classes (that need polymorphism) have the same signature. That means they need to have the same name, number and order of parameters, as well as the parameter types.
In your case, you might do better to have a generic draw()
method, and rely on the subclasses (Rectangle
, Ellipse
) to implement the draw()
method as what you had been thinking of as "drawEllipse" and "drawRectangle".
What about this expect script?
#!/usr/bin/expect -f
spawn ssh root@myhost
expect -exact "root@myhost's password: "
send -- "mypassword\r"
interact
After trial and error I discovered that you need to stage the file that had the merge conflict, then you can commit the merge.
// using exec
function rCopy($directory, $destination)
{
$command = sprintf('cp -r %s/* %s', $directory, $destination);
exec($command);
}
This method will create a copy of your list but your type should be serializable.
Use:
List<Student> lstStudent = db.Students.Where(s => s.DOB < DateTime.Now).ToList().CopyList();
Method:
public static List<T> CopyList<T>(this List<T> lst)
{
List<T> lstCopy = new List<T>();
foreach (var item in lst)
{
using (MemoryStream stream = new MemoryStream())
{
BinaryFormatter formatter = new BinaryFormatter();
formatter.Serialize(stream, item);
stream.Position = 0;
lstCopy.Add((T)formatter.Deserialize(stream));
}
}
return lstCopy;
}
It can enable some new optimisations. const
traditionally is a hint for the type system, and cannot be used for optimisation (e.g. a const
member function can const_cast
and modify the object anyway, legally, so const
cannot be trusted for optimisation).
constexpr
means the expression really is constant, provided the inputs to the function are const. Consider:
class MyInterface {
public:
int GetNumber() const = 0;
};
If this is exposed in some other module, the compiler can't trust that GetNumber()
won't return different values each time it's called - even consecutively with no non-const calls in between - because const
could have been cast away in the implementation. (Obviously any programmer who did this ought to be shot, but the language permits it, therefore the compiler must abide by the rules.)
Adding constexpr
:
class MyInterface {
public:
constexpr int GetNumber() const = 0;
};
The compiler can now apply an optimisation where the return value of GetNumber()
is cached and eliminate additional calls to GetNumber()
, because constexpr
is a stronger guarantee that the return value won't change.
See the benchmark: https://jsperf.com/decode-html12345678/1
console.log(decodeEntities('test: >'));_x000D_
_x000D_
function decodeEntities(str) {_x000D_
// this prevents any overhead from creating the object each time_x000D_
const el = decodeEntities.element || document.createElement('textarea')_x000D_
_x000D_
// strip script/html tags_x000D_
el.innerHTML = str_x000D_
.replace(/<script[^>]*>([\S\s]*?)<\/script>/gmi, '')_x000D_
.replace(/<\/?\w(?:[^"'>]|"[^"]*"|'[^']*')*>/gmi, '');_x000D_
_x000D_
return el.value;_x000D_
}
_x000D_
If you need to leave tags, then remove the two .replace(...)
calls (you can leave the first one if you do not need scripts).
Allows you to change directory based on environment variable without having to specify the '%' directive. If the variable specified does not exist then try the directory name.
@if defined %1 (call cd "%%%1%%") else (call cd %1)
You create and use byte array I/O streams as follows:
byte[] source = ...;
ByteArrayInputStream bis = new ByteArrayInputStream(source);
// read bytes from bis ...
ByteArrayOutputStream bos = new ByteArrayOutputStream();
// write bytes to bos ...
byte[] sink = bos.toByteArray();
Assuming that you are using a JDBC driver that implements the standard JDBC Blob interface (not all do), you can also connect a InputStream
or OutputStream
to a blob using the getBinaryStream
and setBinaryStream
methods1, and you can also get and set the bytes directly.
(In general, you should take appropriate steps to handle any exceptions, and close streams. However, closing bis
and bos
in the example above is unnecessary, since they aren't associated with any external resources; e.g. file descriptors, sockets, database connections.)
1 - The setBinaryStream
method is really a getter. Go figure.
This is what worked for me.
@EnableWebSecurity
public class WebSecurityConfiguration extends WebSecurityConfigurerAdapter {
@Override
protected void configure(HttpSecurity http) throws Exception {
http.cors();
}
}
@Configuration
public class WebConfiguration implements WebMvcConfigurer {
@Override
public void addCorsMappings(CorsRegistry registry) {
registry
.addMapping("/**")
.allowedMethods("*")
.allowedHeaders("*")
.allowedOrigins("*")
.allowCredentials(true);
}
}
This can be useful to see the progress of long insert queries, make any rough estimates (like COUNT(*)
or rough SUM(*)
) etc.
In other words, the results the dirty read queries return are fine as long as you treat them as estimates and don't make any critical decisions based upon them.
As other answers suggest... Some guy (for whatever reason) decided that your old code should not work when you upgrade your PHP, because he knows better than you and don't care about what your code does or how simple it is for you to upgrade.
Well, if you can't upgrade your project overnight you can
downgrade your version of PHP to whatever version that worked
or...
use a shim (kind of polyfill) such as https://github.com/dshafik/php7-mysql-shim or https://github.com/dotpointer/mysql-shim, and then find a place for
include_once("choice_shim.php");
somewhere in your code
That will keep your old PHP code up and running until you are in a mood to update...
The str.split
method will automatically remove all white space between items:
>>> str1 = "a b c d"
>>> str1.split()
['a', 'b', 'c', 'd']
Docs are here: http://docs.python.org/library/stdtypes.html#str.split
You probably want this (to make it like a normal CSS background-image declaration):
$('myObject').css('background-image', 'url(' + imageUrl + ')');
I have reproduced the issue in my system,
postgres=# alter user my-sys with password 'pass11';
ERROR: syntax error at or near "-"
LINE 1: alter user my-sys with password 'pass11';
^
Here is the issue,
psql is asking for input and you have given again the alter query see postgres-#
That's why it's giving error at alter
postgres-# alter user "my-sys" with password 'pass11';
ERROR: syntax error at or near "alter"
LINE 2: alter user "my-sys" with password 'pass11';
^
Solution is as simple as the error,
postgres=# alter user "my-sys" with password 'pass11';
ALTER ROLE
I don't use Gradle in anger myself (just a toy project so far) [author means they have used Gradle on only a toy project so far, not that Gradle is a toy project - see comments], but I'd say that the reasons one would consider using it would be because of the frustrations of Ant and Maven.
In my experience Ant is often write-only (yes I know it is possible to write beautifully modular, elegant builds, but the fact is most people don't). For any non-trivial projects it becomes mind-bending, and takes great care to ensure that complex builds are truly portable. Its imperative nature can lead to replication of configuration between builds (though macros can help here).
Maven takes the opposite approach and expects you to completely integrate with the Maven lifecycle. Experienced Ant users find this particularly jarring as Maven removes many of the freedoms you have in Ant. For example there's a Sonatype blog that enumerates many of the Maven criticisms and their responses.
The Maven plugin mechanism allows for very powerful build configurations, and the inheritance model means you can define a small set of parent POMs encapsulating your build configurations for the whole enterprise and individual projects can inherit those configurations, leaving them lightweight. Maven configuration is very verbose (though Maven 3 promises to address this), and if you want to do anything that is "not the Maven way" you have to write a plugin or use the hacky Ant integration. Note I happen to like writing Maven plugins but appreciate that many will object to the effort involved.
Gradle promises to hit the sweet spot between Ant and Maven. It uses Ivy's approach for dependency resolution. It allows for convention over configuration but also includes Ant tasks as first class citizens. It also wisely allows you to use existing Maven/Ivy repositories.
So if you've hit and got stuck with any of the Ant/Maven pain points, it is probably worth trying Gradle out, though in my opinion it remains to be seen if you wouldn't just be trading known problems for unknown ones. The proof of the pudding is in the eating though so I would reserve judgment until the product is a little more mature and others have ironed out any kinks (they call it bleeding edge for a reason). I'll still be using it in my toy projects though, It's always good to be aware of the options.
You're trying to call the isEmpty()
method on a null
reference (as List test = null;
). This will surely throw a NullPointerException
. You should do if(test!=null)
instead (Checking for null
first).
The method isEmpty()
returns true, if an ArrayList
object contains no elements; false otherwise (for that the List
must first be instantiated that is in your case is null
).
Edit:
You may want to see this question.
As of .NET Core 2.0, the constructor Dictionary<TKey,TValue>(IEnumerable<KeyValuePair<TKey,TValue>>)
now exists.
Werkzeug/Flask as already parsed everything for you. No need to do the same work again with urlparse:
from flask import request
@app.route('/')
@app.route('/data')
def data():
query_string = request.query_string ## There is it
return render_template("data.html")
The full documentation for the request and response objects is in Werkzeug: http://werkzeug.pocoo.org/docs/wrappers/
If you really want to insert this record, remove the `abuse_id`
field and the corresponding value from the INSERT
statement :
INSERT INTO `abuses` ( `user_id` , `abuser_username` , `comment` , `reg_date` , `auction_id` )
VALUES ( 100020, 'artictundra', 'I placed a bid for it more than an hour ago. It is still active. I thought I was supposed to get an email after 15 minutes.', 1338052850, 108625 ) ;
Just need to add: new SimpleDateFormat("bla bla bla", Locale.US)
public static void main(String[] args) throws ParseException {
java.util.Date fecha = new java.util.Date("Mon Dec 15 00:00:00 CST 2014");
DateFormat formatter = new SimpleDateFormat("EEE MMM dd HH:mm:ss Z yyyy", Locale.US);
Date date;
date = (Date)formatter.parse(fecha.toString());
System.out.println(date);
Calendar cal = Calendar.getInstance();
cal.setTime(date);
String formatedDate = cal.get(Calendar.DATE) + "/" +
(cal.get(Calendar.MONTH) + 1) +
"/" + cal.get(Calendar.YEAR);
System.out.println("formatedDate : " + formatedDate);
}
From the Gnuplot documentation. To draw a vertical line from the bottom to the top of the graph at x=3, use:
set arrow from 3, graph 0 to 3, graph 1 nohead
There are more than a few ways. I'll list them in order of inverted preference (i.e., best first, worst last):
import file
. This is good because it's secure, fast, and maintainable. Code gets reused as it's supposed to be done. Most Python libraries run using multiple methods stretched over lots of files. Highly recommended. Note that if your file is called file.py
, your import
should not include the .py
extension at the end.execfile('file.py')
in Python 2exec(open('file.py').read())
in Python 3os.system('python file.py')
. Use when desperate.libpostal: an open-source library to parse addresses, training with data from OpenStreetMap, OpenAddresses and OpenCage.
https://github.com/openvenues/libpostal (more info about it)
Other tools/services:
http://www.gisgraphy.com Free, open source, and ready to use geocoder and geolocalisation webservices, integrating OpenStreetMap, GeoNames and Quattroshapes.
https://github.com/kodapan/osm-common Library for accessing OpenStreetMap services, parsing and processing data.
Note: This answer does not explicitly answer the asked question. the other answers do it. Since the question is specific to a scenario and the raised exception is general, This answer points to the general case.
Hash values are just integers which are used to compare dictionary keys during a dictionary lookup quickly.
Internally, hash()
method calls __hash__()
method of an object which are set by default for any object.
>>> a = [1,2,3,4,[5,6,7],8,9]
>>> set(a)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: unhashable type: 'list'
This happens because of the list inside a list which is a list which cannot be hashed. Which can be solved by converting the internal nested lists to a tuple,
>>> set([1, 2, 3, 4, (5, 6, 7), 8, 9])
set([1, 2, 3, 4, 8, 9, (5, 6, 7)])
>>> hash([1, 2, 3, [4, 5,], 6, 7])
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: unhashable type: 'list'
>>> hash(tuple([1, 2, 3, [4, 5,], 6, 7]))
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: unhashable type: 'list'
>>> hash(tuple([1, 2, 3, tuple([4, 5,]), 6, 7]))
-7943504827826258506
The solution to avoid this error is to restructure the list to have nested tuples instead of lists.
If somebody still gets this page in search results:
fig, ax = plt.subplots()
plt.plot(...)
every_nth = 4
for n, label in enumerate(ax.xaxis.get_ticklabels()):
if n % every_nth != 0:
label.set_visible(False)
Follow instructions (steps 1 to 3 don't needed in windows):
Find mysql config to edit:
/etc/mysql/my.cnf (Mysql 5.5)
/etc/mysql/conf.d/mysql.cnf (Mysql 5.6+)
Find bind-address=127.0.0.1
in config file change bind-address=0.0.0.0
(you can set bind address to one of your interface ips or like me use 0.0.0.0)
Restart mysql service run on console:
service restart mysql
Create a user with a safe password for remote connection. To do this run following command in mysql (if you are linux user to reach mysql console run mysql
and if you set password for root run mysql -p
):
GRANT ALL PRIVILEGES
ON *.* TO 'remote'@'%'
IDENTIFIED BY 'safe_password'
WITH GRANT OPTION;`
Now you should have a user with name of user
and password of safe_password
with capability of remote connect.
Here's a toy example in Python:
>>> from functools import partial as curry
>>> # Original function taking three parameters:
>>> def display_quote(who, subject, quote):
print who, 'said regarding', subject + ':'
print '"' + quote + '"'
>>> display_quote("hoohoo", "functional languages",
"I like Erlang, not sure yet about Haskell.")
hoohoo said regarding functional languages:
"I like Erlang, not sure yet about Haskell."
>>> # Let's curry the function to get another that always quotes Alex...
>>> am_quote = curry(display_quote, "Alex Martelli")
>>> am_quote("currying", "As usual, wikipedia has a nice summary...")
Alex Martelli said regarding currying:
"As usual, wikipedia has a nice summary..."
(Just using concatenation via + to avoid distraction for non-Python programmers.)
Editing to add:
See http://docs.python.org/library/functools.html?highlight=partial#functools.partial, which also shows the partial object vs. function distinction in the way Python implements this.
Worked this out, turns out that android.R.color.black is not the same as Color.BLACK. Changed the code to:
Paint paint = new Paint();
paint.setColor(Color.WHITE);
paint.setStyle(Style.FILL);
canvas.drawPaint(paint);
paint.setColor(Color.BLACK);
paint.setTextSize(20);
canvas.drawText("Some Text", 10, 25, paint);
and it all works fine now!!
You could try also this
<INPUT TYPE="image" SRC="0piximage.gif" HEIGHT="0" WIDTH="0" BORDER="0">
You could include an image with width/height = 0 px
Iterating over two dimensions means you'll need to check over two dimensions.
assuming you're starting with:
var myArray = [
[1,1,1,1,1],
[1,1,1,1,1],
[1,1,1,1,1]
]; //don't forget your semi-colons
You want to expand this two-dimensional array to become:
var myArray = [
[1,1,1,1,1,0,0],
[1,1,1,1,1,0,0],
[1,1,1,1,1,0,0],
[0,0,0,0,0,0,0],
[0,0,0,0,0,0,0],
[0,0,0,0,0,0,0],
];
Which means you need to understand what the difference is.
Start with the outer array:
var myArray = [
[...],
[...],
[...]
];
If you want to make this array longer, you need to check that it's the correct length, and add more inner arrays to make up the difference:
var i,
rows,
myArray;
rows = 8;
myArray = [...]; //see first example above
for (i = 0; i < rows; i += 1) {
//check if the index exists in the outer array
if (!(i in myArray)) {
//if it doesn't exist, we need another array to fill
myArray.push([]);
}
}
The next step requires iterating over every column in every array, we'll build on the original code:
var i,
j,
row,
rows,
cols,
myArray;
rows = 8;
cols = 7; //adding columns in this time
myArray = [...]; //see first example above
for (i = 0; i < rows; i += 1) {
//check if the index exists in the outer array (row)
if (!(i in myArray)) {
//if it doesn't exist, we need another array to fill
myArray[i] = [];
}
row = myArray[i];
for (j = 0; j < cols; j += 1) {
//check if the index exists in the inner array (column)
if (!(i in row)) {
//if it doesn't exist, we need to fill it with `0`
row[j] = 0;
}
}
}
Add XAttribute
in the constructor of the XElement
, like
new XElement("Conn", new XAttribute("Server", comboBox1.Text));
You can also add multiple attributes or elements via the constructor
new XElement("Conn", new XAttribute("Server", comboBox1.Text), new XAttribute("Database", combobox2.Text));
or you can use the Add-Method of the XElement
to add attributes
XElement element = new XElement("Conn");
XAttribute attribute = new XAttribute("Server", comboBox1.Text);
element.Add(attribute);
My solution that would work on Chrome, Firefox, IE9, IE10 (Change the degrees as per your requirement):
.rotate-text {
-webkit-transform: rotate(270deg);
-moz-transform: rotate(270deg);
-ms-transform: rotate(270deg);
-o-transform: rotate(270deg);
transform: rotate(270deg);
filter: none; /*Mandatory for IE9 to show the vertical text correctly*/
}
Problem was for pre-lolipop devices. I was able to solve this problem by replacing the following:
In the Toolbar layout, replace everything which is like this:
android:layout_height="?android:attr/actionBarSize"
android:background="?android:attr/colorPrimary"
with
android:layout_height="?attr/actionBarSize"
android:background="@color/colorPrimary"
You can use parentheses to override rules of precedence.
It'll have the same behavior as the underlying recv libc call see the man page for an official description of behavior (or read a more general description of the sockets api).
height:100% works if the parent container has a specified height property else, it won't work
SELECT author FROM lyrics WHERE author LIKE 'B%';
Make sure you have an index on author
, though!
Unless you absolutely have to convert the date to an integer, consider using a Double
instead to represent the time interval. After all, this is the type that timeIntervalSince1970
returns. All of the answers that convert to integers loose sub-millisecond precision, but this solution is much more accurate (although you will still lose some precision due to floating-point imprecision).
public extension Date {
/// The interval, in milliseconds, between the date value and
/// 00:00:00 UTC on 1 January 1970.
/// Equivalent to `self.timeIntervalSince1970 * 1000`.
var millisecondsSince1970: Double {
return self.timeIntervalSince1970 * 1000
}
/**
Creates a date value initialized relative to 00:00:00 UTC
on 1 January 1970 by a given number of **milliseconds**.
equivalent to
```
self.init(timeIntervalSince1970: TimeInterval(milliseconds) / 1000)
```
- Parameter millisecondsSince1970: A time interval in milliseconds.
*/
init(millisecondsSince1970: Double) {
self.init(timeIntervalSince1970: TimeInterval(milliseconds) / 1000)
}
}
onChange doesn't fire until you lose focus later. If you want to be really strict with instantaneous changes of all sorts, use:
<input
type = "text"
onchange = "myHandler();"
onkeypress = "this.onchange();"
onpaste = "this.onchange();"
oninput = "this.onchange();"
/>
Well, nothing worked for me from all the answers. Finally, I clicked Run > Edit Configuration. On the left, u can choose a new main module and remove to deleted ones.
Yes! there is a way to use a variable as a pointer in python!
I am sorry to say that many of answers were partially wrong. In principle every equal(=) assignation shares the memory address (check the id(obj) function), but in practice it is not such. There are variables whose equal("=") behaviour works in last term as a copy of memory space, mostly in simple objects (e.g. "int" object), and others in which not (e.g. "list","dict" objects).
Here is an example of pointer assignation
dict1 = {'first':'hello', 'second':'world'}
dict2 = dict1 # pointer assignation mechanism
dict2['first'] = 'bye'
dict1
>>> {'first':'bye', 'second':'world'}
Here is an example of copy assignation
a = 1
b = a # copy of memory mechanism. up to here id(a) == id(b)
b = 2 # new address generation. therefore without pointer behaviour
a
>>> 1
Pointer assignation is a pretty useful tool for aliasing without the waste of extra memory, in certain situations for performing comfy code,
class cls_X():
...
def method_1():
pd1 = self.obj_clsY.dict_vars_for_clsX['meth1'] # pointer dict 1: aliasing
pd1['var4'] = self.method2(pd1['var1'], pd1['var2'], pd1['var3'])
#enddef method_1
...
#endclass cls_X
but one have to be aware of this use in order to prevent code mistakes.
To conclude, by default some variables are barenames (simple objects like int, float, str,...), and some are pointers when assigned between them (e.g. dict1 = dict2). How to recognize them? just try this experiment with them. In IDEs with variable explorer panel usually appears to be the memory address ("@axbbbbbb...") in the definition of pointer-mechanism objects.
I suggest investigate in the topic. There are many people who know much more about this topic for sure. (see "ctypes" module). I hope it is helpful. Enjoy the good use of the objects! Regards, José Crespo
Well I found this way :
Oracle SQL Developer (Left top icon) > Preferences > Database > NLS and set the Date Format as MM/DD/YYYY HH24:MI:SS
Use overridePendingTransition
startActivity();
overridePendingTransition(R.anim.fadein, R.anim.fadeout);
fadein.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
<alpha xmlns:android="http://schemas.android.com/apk/res/android"
android:interpolator="@android:anim/accelerate_interpolator"
android:fromAlpha="0.0" android:toAlpha="1.0" android:duration="500" />
</set>
fadeout.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
<alpha xmlns:android="http://schemas.android.com/apk/res/android"
android:interpolator="@android:anim/anticipate_interpolator"
android:fromAlpha="1.0" android:toAlpha="0.0" android:duration="500" />
</set>
If you use jQuery built-in after()
with empty value it will create a dynamic object that will match your :after
CSS selector.
$('.active').after().click(function () {
alert('clickable!');
});
See the jQuery documentation.
It can simply be done with a single reduce operation as follows;
var avg = [1,2,3,4].reduce((p,c,_,a) => p + c/a.length,0);_x000D_
console.log(avg)
_x000D_
For temporary internal files their are 2 options
1.
File file;
file = File.createTempFile(filename, null, this.getCacheDir());
2.
File file
file = new File(this.getCacheDir(), filename);
Both options adds files in the applications cache directory and thus can be cleared to make space as required but option 1 will add a random number on the end of the filename to keep files unique. It will also add a file extension which is .tmp
by default, but it can be set to anything via the use of the 2nd parameter. The use of the random number means despite specifying a filename it doesn't stay the same as the number is added along with the suffix/file extension (.tmp
by default) e.g you specify your filename as internal_file
and comes out as internal_file1456345.tmp
. Whereas you can specify the extension you can't specify the number that is added. You can however find the filename it generates via file.getName();
, but you would need to store it somewhere so you can use it whenever you wanted for example to delete or read the file. Therefore for this reason I prefer the 2nd option as the filename you specify is the filename that is created.
ES2020 Answer
With the Nullish Coalescing Operator, you can set a default value if value
is null or undefined.
const setVariable = localStorage.getItem('value') ?? 0;
However, you should be aware that the nullish coalescing operator does not return the default value for other types of falsy value such as 0
and ''
.
Do take note that browser support for the operator is limited. According to the data from caniuse, only 48.34% of browsers are supported (as of April 2020). Node.js support was added in version 14.
Authentication is the process of ascertaining that somebody really is who they claim to be.
Authorization refers to rules that determine who is allowed to do what. E.g. Adam may be authorized to create and delete databases, while Usama is only authorised to read.
The two concepts are completely orthogonal and independent, but both are central to security design, and the failure to get either one correct opens up the avenue to compromise.
In terms of web apps, very crudely speaking, authentication is when you check login credentials to see if you recognize a user as logged in, and authorization is when you look up in your access control whether you allow the user to view, edit, delete or create content.
this is how to print whitespaces in python.
import string
string.whitespace
'\t\n\x0b\x0c\r '
i.e .
print "hello world"
print "Hello%sworld"%' '
print "hello", "world"
print "Hello "+"world
Surprisingly, what worked for me was going to iOS Simulator menu, and pressing "Reset Content and Settings". (in iOS 13, its under Hardware)
For Windows users looking for solution of same problem. I just repleced
LoadModule php7_module "C:/xampp/php/php7apache2_4.dll"
in my /conf/extra/http?-xampp.conf
If you are going to call relative.py
directly and i.e. if you really want to import from a top level module you have to explicitly add it to the sys.path
list.
Here is how it should work:
# Add this line to the beginning of relative.py file
import sys
sys.path.append('..')
# Now you can do imports from one directory top cause it is in the sys.path
import parent
# And even like this:
from parent import Parent
If you think the above can cause some kind of inconsistency you can use this instead:
sys.path.append(sys.path[0] + "/..")
sys.path[0]
refers to the path that the entry point was ran from.
Add to your settings.py
:
LOGGING = {
'version': 1,
'disable_existing_loggers': False,
'handlers': {
'file': {
'level': 'DEBUG',
'class': 'logging.FileHandler',
'filename': 'debug.log',
},
},
'loggers': {
'django': {
'handlers': ['file'],
'level': 'DEBUG',
'propagate': True,
},
},
}
And it will create a file called debug.log
in the root of your.
https://docs.djangoproject.com/en/1.10/topics/logging/
I can see all answers above are partially correct only. In reality all 21st Century PHP apps will have FastCGI Process Manager(php-fpm) so once you have added php-info() into your test.php script and checked the correct path for php.ini
Go to php.ini and set short_open_tag = On
IMPORTANT: then you must restart your php-fpm process so this can work!
sudo service php-fpm restart
and then finally restart your nginx/http server
sudo service nginx restart
For read a cookie i've made little modifications of the Miquel version that doesn't work for me:
getCookie(name: string) {
let ca: Array<string> = document.cookie.split(';');
let cookieName = name + "=";
let c: string;
for (let i: number = 0; i < ca.length; i += 1) {
if (ca[i].indexOf(name, 0) > -1) {
c = ca[i].substring(cookieName.length +1, ca[i].length);
console.log("valore cookie: " + c);
return c;
}
}
return "";
def expiration_time():
import datetime,calendar
timestamp = calendar.timegm(datetime.datetime.now().timetuple())
returnValue = datetime.timedelta(minutes=5).total_seconds() + timestamp
return returnValue
This answer from askubuntu is what worked for me. Seems simpler than other options an less error-prone, since it uses package libgtest-dev
to get the sources and builds from there: https://askubuntu.com/questions/145887/why-no-library-files-installed-for-google-test?answertab=votes#tab-top
Please refer to that answer, but just as a shortcut I provide the steps here as well:
sudo apt-get install -y libgtest-dev
sudo apt-get install -y cmake
cd /usr/src/gtest
sudo cmake .
sudo make
sudo mv libg* /usr/lib/
After that, I could build my project which depends on gtest
with no issues.
If you're using Apache on Windows, you can install the mod_auth_sspi from
https://sourceforge.net/projects/mod-auth-sspi/
Instructions are in the INSTALL file, and there is a whoami.php example. (It's just a case of copying the mod_auth_sspi.so file into a folder and adding a line into httpd.conf.)
Once it's installed and the necessary settings are made in httpd.conf to protect the directories you wish, PHP will populate the $_SERVER['REMOTE_USER']
with the user and domain ('USER\DOMAIN') of the authenticated user in IE -- or prompt and authenticate in Firefox before passing it in.
Info is session-based, so single(ish) signon is possible even in Firefox...
-Craig
Experienced this issue on new Windows 10 machine on VS2015 with an existing project. Package Manager 3.4.4. Restore packages enabled.
The restore doesn't seem to work completely. Had to run the following on the Package Manager Command line
Update-Package -ProjectName "YourProjectName" -Id Microsoft.Web.Infrastructure -Reinstall
This made the following changes to my solution file which the restore did NOT do.
<Reference Include="Microsoft.Web.Infrastructure, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL"> <HintPath>..\packages\Microsoft.Web.Infrastructure.1.0.0.0\lib\net40\Microsoft.Web.Infrastructure.dll</HintPath> <Private>True</Private> </Reference>
Just adding the above elements to the ItemGroup section in you solution file will ALSO solve the issue provided that ..\packages\Microsoft.Web.Infrastructure.1.0.0.0\lib\net40\Microsoft.Web.Infrastructure.dll exist.
Easier to just do the -Reinstall but good to understand what it does differently to the package restore.
The accepted answer was great solution for me. The only thing to add is about inflate()
method.
In accepted answer all android:layout_*
parameters will not be applied.
The reason is no way to adjust it, cause null
was passed as ViewGroup parent
.
You can use it like this:
View view = inflater.inflate(R.layout.view, parent, false);
and the parent
is the ViewGroup
, from where you like to adjust android:layout_*
.
In this case, all relative properties will be set.
Hope it'll be useful for someone.
example :
df1.iloc[:5]
df1.loc['A','B']
First off let's clarify what a polyfil is not: A polyfill is not part of the HTML5 Standard. Nor is a polyfill limited to Javascript, even though you often see polyfills being referred to in those contexts.
The term polyfill itself refers to some code that "allows you to have some specific functionality that you expect in current or “modern” browsers to also work in other browsers that do not have the support for that functionality built in. "
Source and example of polyfill here:
http://www.programmerinterview.com/index.php/html5/html5-polyfill/
The question is, can you only delete a column from an unexisting table ;-)
BEGIN TRANSACTION
IF exists (SELECT * FROM sys.columns c
INNER JOIN sys.objects t ON (c.[object_id] = t.[object_id])
WHERE t.[object_id] = OBJECT_ID(N'[dbo].[MyTable]')
AND c.[name] = 'ColumnName')
BEGIN TRY
ALTER TABLE [dbo].[MyTable] DROP COLUMN ColumnName
END TRY
BEGIN CATCH
print 'FAILED!'
END CATCH
ELSE
BEGIN
SELECT ERROR_NUMBER() AS ErrorNumber;
print 'NO TABLE OR COLUMN FOUND !'
END
COMMIT
Just in case you're using bootstrap 4, you can add px-0
(set left/right padding to 0) and mx-0
(set left/right margin to 0) CSS class to body tag, like below:
<body class="px-0; mx-0">
<!--your body HTML-->
</body>
Use divs with max height and min height around the content that needs to scroll.
<tr>
<td>
<div>content</div>
</td>
</tr>
td div{
max-height:20px;
}
Rob answered it and saved me few more hours of trials. Read the output/error buffer before waiting:
// Read the output stream first and then wait.
string output = p.StandardOutput.ReadToEnd();
p.WaitForExit();
var splitEle = xn.Attributes["split"];
if (splitEle !=null){
return splitEle .Value;
}
In case you were struggling to change linetypes
, the following answer should be helpful. (This is an addition to the solution by Andy W.)
We will try to extend the learned pattern:
cols <- c("LINE1"="#f04546","LINE2"="#3591d1","BAR"="#62c76b")
line_types <- c("LINE1"=1,"LINE2"=3)
ggplot(data=data,aes(x=a)) +
geom_bar(stat="identity", aes(y=h,fill = "BAR"))+ #green
geom_line(aes(y=b,group=1, colour="LINE1", linetype="LINE1"),size=0.5) + #red
geom_point(aes(y=b, colour="LINE1", fill="LINE1"),size=2) + #red
geom_line(aes(y=c,group=1,colour="LINE2", linetype="LINE2"),size=0.5) + #blue
geom_point(aes(y=c,colour="LINE2", fill="LINE2"),size=2) + #blue
scale_colour_manual(name="Error Bars",values=cols,
guide = guide_legend(override.aes=aes(fill=NA))) +
scale_linetype_manual(values=line_types)+
scale_fill_manual(name="Bar",values=cols, guide="none") +
ylab("Symptom severity") + xlab("PHQ-9 symptoms") +
ylim(0,1.6) +
theme_bw() +
theme(axis.title.x = element_text(size = 15, vjust=-.2)) +
theme(axis.title.y = element_text(size = 15, vjust=0.3))
However, what we get is the following result:
The problem is that the linetype
is not merged in the main legend.
Note that we did not give any name to the method scale_linetype_manual
.
The trick which works here is to give it the same name as what you used for naming scale_colour_manual
.
More specifically, if we change the corresponding line to the following we get the desired result:
scale_linetype_manual(name="Error Bars",values=line_types)
Now, it is easy to change the size of the line with the same idea.
Note that the geom_bar
has not colour property anymore. (I did not try to fix this issue.) Also, adding geom_errorbar
with colour attribute spoils the result. It would be great if somebody can come up with a better solution which resolves these two issues as well.
Angular 2.0.0 Final:
I have found that using a ViewChild
setter is most reliable way to set the initial form control focus:
@ViewChild("myInput")
set myInput(_input: ElementRef | undefined) {
if (_input !== undefined) {
setTimeout(() => {
this._renderer.invokeElementMethod(_input.nativeElement, "focus");
}, 0);
}
}
The setter is first called with an undefined
value followed by a call with an initialized ElementRef
.
Working example and full source here: http://plnkr.co/edit/u0sLLi?p=preview
Using TypeScript 2.0.3 Final/RTM, Angular 2.0.0 Final/RTM, and Chrome 53.0.2785.116 m (64-bit).
UPDATE for Angular 4+
Renderer
has been deprecated in favor of Renderer2
, but Renderer2
does not have the invokeElementMethod
. You will need to access the DOM directly to set the focus as in input.nativeElement.focus()
.
I'm still finding that the ViewChild setter approach works best. When using AfterViewInit
I sometimes get read property 'nativeElement' of undefined
error.
@ViewChild("myInput")
set myInput(_input: ElementRef | undefined) {
if (_input !== undefined) {
setTimeout(() => { //This setTimeout call may not be necessary anymore.
_input.nativeElement.focus();
}, 0);
}
}
Sometimes, just adding the shell command doesn't work. We need to check whether visual studio code is available in "Applications" folder or not. That was the case for me.
The moment you download VS code, it stays in "Downloads" folder and terminal doesn't pick up from there. So, I manually moved my VS code to "Applications" folder to access from Terminal.
Step 1: Download VS code, which will give a zipped folder.
Step 2: Run it, which will give a exe kinda file in downloads folder.
Step 3: Move it to "Applications" folder manually.
Step 4: Open VS code, "Command+Shift+P" and run the shell command.
Step 5: Restart the terminal.
Step 6: Typing "Code ." on terminal should work now.
Generally you don't want to value only the source
version (javac -source 1.8
for example) but you want to value both the source
and the target
version (javac -source 1.8 -target 1.8
for example).
Note that from Java 9, you have a way to convey both information and in a more robust way for cross-compilation compatibility (javac -release 9
).
Maven that wraps the javac
command provides multiple ways to convey all these JVM standard options.
Using maven-compiler-plugin
or maven.compiler.source
/maven.compiler.target
properties to specify the source
and the target
are equivalent.
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
</plugins>
and
<properties>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
</properties>
are equivalent according to the Maven documentation of the compiler plugin
since the <source>
and the <target>
elements in the compiler configuration use the properties maven.compiler.source
and maven.compiler.target
if they are defined.
The
-source
argument for the Java compiler.
Default value is:1.6
.
User property is:maven.compiler.source
.
The
-target
argument for the Java compiler.
Default value is:1.6
.
User property is:maven.compiler.target
.
About the default values for source
and target
, note that
since the 3.8.0
of the maven compiler, the default values have changed from 1.5
to 1.6
.
<release>
tag — new way to specify Java version in maven-compiler-plugin
3.6You can use the release
argument :
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.0</version>
<configuration>
<release>9</release>
</configuration>
</plugin>
You could also declare just the user property maven.compiler.release
:
<properties>
<maven.compiler.release>9</maven.compiler.release>
</properties>
But at this time the last one will not be enough as the maven-compiler-plugin
default version you use doesn't rely on a recent enough version.
The Maven release
argument conveys release
to the Java compiler to access the JVM standard option newly added to Java 9, JEP 247: Compile for Older Platform Versions.
Compiles against the public, supported and documented API for a specific VM version.
This way provides a standard way to specify the same version for the source
, the target
and the bootstrap
JVM options.
Note that specifying the bootstrap
is a good practice for cross compilations and it will not hurt if you don't make cross compilations either.
Neither maven.compiler.source
/maven.compiler.target
properties or using the maven-compiler-plugin
is better.
It changes nothing in the facts since finally the two ways rely on the same properties and the same mechanism : the maven core compiler plugin.
Well, if you don't need to specify other properties or behavior than Java versions in the compiler plugin, using this way makes more sense as this is more concise:
<properties>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
</properties>
The release
argument (third point) is a way to strongly consider if you want to use the same version for the source
and the target
.
Error indicates that there is no UserID column in your Employees table. Try adding the column first and then re-run the statement.
ALTER TABLE Employees
ADD CONSTRAINT FK_ActiveDirectories_UserID FOREIGN KEY (UserID)
REFERENCES ActiveDirectories(id);
Check the javadocs for java.text.SimpleDateFormat
It describes everything you need.
You are not returning a response object from your view my_form_post
. The function ends with implicit return None
, which Flask does not like.
Make the function my_form_post
return an explicit response, for example
return 'OK'
at the end of the function.
For the text after the first =
and before the next =
cut -d "=" -f2 <<< "$your_str"
or
sed -e 's#.*=\(\)#\1#' <<< "$your_str"
For all text after the first =
regardless of if there are multiple =
cut -d "=" -f2- <<< "$your_str"
You might just have to install the packages.
yum install php-pdo php-mysqli
After they're installed, restart Apache.
httpd restart
or
apachectl restart
If you want most of your activities to have an action bar you would probably inherit your base theme from the default one (this is automatically generated by Android Studio per default):
<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
<!-- Customize your theme here. -->
<item name="colorPrimary">@color/colorPrimary</item>
<item name="colorPrimaryDark">@color/colorPrimaryDark</item>
<item name="colorAccent">@color/colorAccent</item>
</style>
And then add a special theme for your bar-less activity:
<style name="AppTheme.NoTitle" parent="AppTheme">
<item name="windowNoTitle">true</item>
<item name="windowActionBar">false</item>
<item name="actionBarTheme">@null</item>
</style>
For me, setting actionBarTheme to @null was the solution.
Finally setup the activity in your manifest file:
<activity ... android:theme="@style/AppTheme.NoTitle" ... >
You can find the answer here: Is there a minlength validation attribute in HTML5?
Therefore this should do the job:
<input pattern=".{6,6}">