If, like me, you had dynamically created buttons on your page, the
$("#your-bs-button's-id").on("click", function(event) {
or
$(".your-bs-button's-class").on("click", function(event) {
methods won't work because they only work on current elements (not future elements). Instead you need to reference a parent item that existed at the initial loading of the web page.
$(document).on("click", "#your-bs-button's-id", function(event) {
or more generally
$("#pre-existing-element-id").on("click", ".your-bs-button's-class", function(event) {
There are many other references to this issue on stack overflow here and here.
Just to extend previous answers - it could help someone. If your getArguments()
returns null
, put it to onCreate()
method and not to constructor of your fragment:
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
int index = getArguments().getInt("index");
}
In order to match a list of different categories of file, you can use the filter like this:
var dlg = new Microsoft.Win32.OpenFileDialog()
{
DefaultExt = ".xlsx",
Filter = "Excel Files (*.xls, *.xlsx)|*.xls;*.xlsx|CSV Files (*.csv)|*.csv"
};
from bower help, save option has a capital S
-S, --save Save installed packages into the project's bower.json dependencies
This should be done in the dataset. You could do this
Select CAST(CAST(YourDateTime as date) AS Varchar(11)) as DateColumnName
In SSRS
Layout, just do this =Fields!DateColumnName.Value
Just bind to the hidden
property
[hidden]="!myVar"
See also
issues
hidden
has some issues though because it can conflict with CSS for the display
property.
See how some
in Plunker example doesn't get hidden because it has a style
:host {display: block;}
set. (This might behave differently in other browsers - I tested with Chrome 50)
workaround
You can fix it by adding
[hidden] { display: none !important;}
To a global style in index.html
.
another pitfall
hidden="false"
hidden="{{false}}"
hidden="{{isHidden}}" // isHidden = false;
are the same as
hidden="true"
and will not show the element.
hidden="false"
will assign the string "false"
which is considered truthy.
Only the value false
or removing the attribute will actually make the element
visible.
Using {{}}
also converts the expression to a string and won't work as expected.
Only binding with []
will work as expected because this false
is assigned as false
instead of "false"
.
*ngIf
vs [hidden]
*ngIf
effectively removes its content from the DOM while [hidden]
modifies the display
property and only instructs the browser to not show the content but the DOM still contains it.
It worked for me on windows with python 2 installation :
This is how i created Python 3 virtual environment on my existing python 2 installation.
Yes, that is the difference, the Add method throws an exception if the key already exists.
The reason to use the Add method is exactly this. If the dictionary is not supposed to contain the key already, you usually want the exception so that you are made aware of the problem.
I just created a discover.py file in my base test directory and added import statements for anything in my sub directories. Then discover is able to find all my tests in those directories by running it on discover.py
python -m unittest discover ./test -p '*.py'
# /test/discover.py
import unittest
from test.package1.mod1 import XYZTest
from test.package1.package2.mod2 import ABCTest
...
if __name__ == "__main__"
unittest.main()
You can simply use the toUTCString
(or toISOString
) methods of the date object.
Example:
new Date("Fri Jan 20 2012 11:51:36 GMT-0500").toUTCString()
// Output: "Fri, 20 Jan 2012 16:51:36 GMT"
If you prefer better control of the output format, consider using a library such as date-fns or moment.js.
Also, in your question, you've actually converted the time incorrectly. When an offset is shown in a timestamp string, it means that the date and time values in the string have already been adjusted from UTC by that value. To convert back to UTC, invert the sign before applying the offset.
11:51:36 -0300 == 14:51:36Z
Swift 3+ & Swift 4 version:
DispatchQueue.main.async {
print("Hello")
}
Swift 3 and Xcode 9.2:
dispatch_async_on_main_queue {
print("Hello")
}
The biggest problem with a batch script is handling rollback when the user clicks cancel (or something goes wrong during your install). The correct way to handle this scenario is to create a CustomAction that adds temporary rows to the RemoveFiles table. That way the Windows Installer handles the rollback cases for you. It is insanely simpler when you see the solution.
Anyway, to have an action only execute during uninstall add a Condition element with:
REMOVE ~= "ALL"
the ~= says compare case insensitive (even though I think ALL is always uppercaesd). See the MSI SDK documentation about Conditions Syntax for more information.
PS: There has never been a case where I sat down and thought, "Oh, batch file would be a good solution in an installation package." Actually, finding an installation package that has a batch file in it would only encourage me to return the product for a refund.
Use sys.getsizeof
to get the size of an object, in bytes.
>>> from sys import getsizeof
>>> a = 42
>>> getsizeof(a)
12
>>> a = 2**1000
>>> getsizeof(a)
146
>>>
Note that the size and layout of an object is purely implementation-specific. CPython, for example, may use totally different internal data structures than IronPython. So the size of an object may vary from implementation to implementation.
Use this code ;
String mydate = java.text.DateFormat.getDateTimeInstance().format(Calendar.getInstance().getTime());
This will shown as :
Feb 5, 2013 12:39:02PM
I like the solution using the -eq
test, because it's basically a one-liner.
My own solution was to use parameter expansion to throw away all the numerals and see if there was anything left. (I'm still using 3.0, haven't used [[
or expr
before, but glad to meet them.)
if [ "${INPUT_STRING//[0-9]}" = "" ]; then
# yes, natural number
else
# no, has non-numeral chars
fi
We can use setProperty or cssText to add !important
to a DOM element using JavaScript.
Example 1:
elem.style.setProperty ("color", "green", "important");
Example 2:
elem.style.cssText='color: red !important;'
First of all thanks for this code. I have made some drawing changes in this function to remove corner problem of drawing.
-(void)drawRect:(CGRect)rect
{
// Drawing code
CGContextRef c = UIGraphicsGetCurrentContext();
CGContextSetFillColorWithColor(c, [fillColor CGColor]);
CGContextSetStrokeColorWithColor(c, [borderColor CGColor]);
CGContextSetLineWidth(c, 2);
if (position == CustomCellBackgroundViewPositionTop) {
CGFloat minx = CGRectGetMinX(rect) , midx = CGRectGetMidX(rect), maxx = CGRectGetMaxX(rect) ;
CGFloat miny = CGRectGetMinY(rect) , maxy = CGRectGetMaxY(rect) ;
minx = minx + 1;
miny = miny + 1;
maxx = maxx - 1;
maxy = maxy ;
CGContextMoveToPoint(c, minx, maxy);
CGContextAddArcToPoint(c, minx, miny, midx, miny, ROUND_SIZE);
CGContextAddArcToPoint(c, maxx, miny, maxx, maxy, ROUND_SIZE);
CGContextAddLineToPoint(c, maxx, maxy);
// Close the path
CGContextClosePath(c);
// Fill & stroke the path
CGContextDrawPath(c, kCGPathFillStroke);
return;
} else if (position == CustomCellBackgroundViewPositionBottom) {
CGFloat minx = CGRectGetMinX(rect) , midx = CGRectGetMidX(rect), maxx = CGRectGetMaxX(rect) ;
CGFloat miny = CGRectGetMinY(rect) , maxy = CGRectGetMaxY(rect) ;
minx = minx + 1;
miny = miny ;
maxx = maxx - 1;
maxy = maxy - 1;
CGContextMoveToPoint(c, minx, miny);
CGContextAddArcToPoint(c, minx, maxy, midx, maxy, ROUND_SIZE);
CGContextAddArcToPoint(c, maxx, maxy, maxx, miny, ROUND_SIZE);
CGContextAddLineToPoint(c, maxx, miny);
// Close the path
CGContextClosePath(c);
// Fill & stroke the path
CGContextDrawPath(c, kCGPathFillStroke);
return;
} else if (position == CustomCellBackgroundViewPositionMiddle) {
CGFloat minx = CGRectGetMinX(rect) , maxx = CGRectGetMaxX(rect) ;
CGFloat miny = CGRectGetMinY(rect) , maxy = CGRectGetMaxY(rect) ;
minx = minx + 1;
miny = miny ;
maxx = maxx - 1;
maxy = maxy ;
CGContextMoveToPoint(c, minx, miny);
CGContextAddLineToPoint(c, maxx, miny);
CGContextAddLineToPoint(c, maxx, maxy);
CGContextAddLineToPoint(c, minx, maxy);
CGContextClosePath(c);
// Fill & stroke the path
CGContextDrawPath(c, kCGPathFillStroke);
return;
}
}
There are a lot of good answers here, but since I independently arrived at my own before reading this, I figured I'd toss mine up here anyway...
Here's a method that I'm using for this which will work universally across compilers and platforms:
Create a struct or class as a container for your collection of objects. Define an operator overload function for <<
.
class MyObject;
struct MyObjectList
{
std::list<MyObject> objects;
MyObjectList& operator<<( const MyObject o )
{
objects.push_back( o );
return *this;
}
};
You can create functions which take your struct as a parameter, e.g.:
someFunc( MyObjectList &objects );
Then, you can call that function, like this:
someFunc( MyObjectList() << MyObject(1) << MyObject(2) << MyObject(3) );
That way, you can build and pass a dynamically sized collection of objects to a function in one single clean line!
Something like this should work:
INSERT INTO #IMEIS (imei) VALUES ('val1'), ('val2'), ...
UPDATE:
Apparently this syntax is only available starting on SQL Server 2008.
The option is locale: 'ru'
But first, you have to call the script ../moment.js/version/locale/ru.js
Hope this helps.
Yes, however you will need to set your Binding flags to search for private fields (if your looking for the member outside of the class instance).
The binding flag you will need is: System.Reflection.BindingFlags.NonPublic
if you're looking for the equivalent of "adb run myapp.apk"
you can use the script shown in this answer
(linux and mac only - maybe with cygwin on windows)
linux/mac users can also create a script to run an apk with something like the following:
create a file named "adb-run.sh" with these 3 lines:
pkg=$(aapt dump badging $1|awk -F" " '/package/ {print $2}'|awk -F"'" '/name=/ {print $2}')
act=$(aapt dump badging $1|awk -F" " '/launchable-activity/ {print $2}'|awk -F"'" '/name=/ {print $2}')
adb shell am start -n $pkg/$act
then "chmod +x adb-run.sh" to make it executable.
now you can simply:
adb-run.sh myapp.apk
The benefit here is that you don't need to know the package name or launchable activity name. Similarly, you can create "adb-uninstall.sh myapp.apk"
Note: This requires that you have aapt in your path. You can find it under the new build tools folder in the SDK
It specifies that an iterator has come to an end. You can think of yield break
as a return
statement which does not return a value.
For example, if you define a function as an iterator, the body of the function may look like this:
for (int i = 0; i < 5; i++)
{
yield return i;
}
Console.Out.WriteLine("You will see me");
Note that after the loop has completed all its cycles, the last line gets executed and you will see the message in your console app.
Or like this with yield break
:
int i = 0;
while (true)
{
if (i < 5)
{
yield return i;
}
else
{
// note that i++ will not be executed after this
yield break;
}
i++;
}
Console.Out.WriteLine("Won't see me");
In this case the last statement is never executed because we left the function early.
for ( i = 0; i < total.length; i++ );
^-- remove the semi-colon here
With this semi-colon, the loop loops until i == total.length
, doing nothing, and then what you thought was the body of the loop is executed.
If you call your classes tests Maven seems to run them automatically, at least they did for me. Rename the classes and Maven will just go through to verification without running them.
Use Environment.NewLine for line breaks.
I have also found some more error subcodes, in case of OAuth exception. Copied from the facebook bugtracker, without any garantee (maybe contain deprecated, wrong and discontinued ones):
/**
* (Date: 30.01.2013)
*
* case 1: - "An error occured while creating the share (publishing to wall)"
* - "An unknown error has occurred."
* case 2: "An unexpected error has occurred. Please retry your request later."
* case 3: App must be on whitelist
* case 4: Application request limit reached
* case 5: Unauthorized source IP address
* case 200: Requires extended permissions
* case 240: Requires a valid user is specified (either via the session or via the API parameter for specifying the user."
* case 1500: The url you supplied is invalid
* case 200:
* case 210: - Subject must be a page
* - User not visible
*/
/**
* Error Code 100 several issus:
* - "Specifying multiple ids with a post method is not supported" (http status 400)
* - "Error finding the requested story" but it is available via GET
* - "Invalid post_id"
* - "Code was invalid or expired. Session is invalid."
*
* Error Code 2:
* - Service temporarily unavailable
*/
and how do I then make the warning go away?
You are probably going to have to reinstall or upgrade your NuGet packages to fix this.
In code, you need to explicitly create a Brush
instance:
Fill = new SolidColorBrush(Color.FromArgb(0xff, 0xff, 0x90))
Based on accepted answer in ES6. Smaller, maintainable and works in modern browsers.
function hashCode(str) {_x000D_
return str.split('').reduce((prevHash, currVal) =>_x000D_
(((prevHash << 5) - prevHash) + currVal.charCodeAt(0))|0, 0);_x000D_
}_x000D_
_x000D_
// Test_x000D_
console.log("hashCode(\"Hello!\"): ", hashCode('Hello!'));
_x000D_
EDIT (2019-11-04):
one-liner arrow function version :
const hashCode = s => s.split('').reduce((a,b) => (((a << 5) - a) + b.charCodeAt(0))|0, 0)_x000D_
_x000D_
// test_x000D_
console.log(hashCode('Hello!'))
_x000D_
I needed to clear focus from all fields programmatically. I just added the following two statements to my main layout definition.
myLayout.setDescendantFocusability(ViewGroup.FOCUS_BEFORE_DESCENDANTS);
myLayout.setFocusableInTouchMode(true);
That's it. Fixed my problem instantly. Thanks, Silver, for pointing me in the right direction.
The manual for GNU Make gives a clear definition for all
in its list of standard targets.
If the author of the Makefile is following that convention then the target all
should:
make
should do the same as make all
.To achieve 1 all
is typically defined as a .PHONY
target that depends on the executable(s) that form the entire program:
.PHONY : all
all : executable
To achieve 2 all
should either be the first target defined in the make file or be assigned as the default goal:
.DEFAULT_GOAL := all
To add a little to @Bakuriu's answer:
If you already know where the warning is likely to occur then it's often cleaner to use the numpy.errstate
context manager, rather than numpy.seterr
which treats all subsequent warnings of the same type the same regardless of where they occur within your code:
import numpy as np
a = np.r_[1.]
with np.errstate(divide='raise'):
try:
a / 0 # this gets caught and handled as an exception
except FloatingPointError:
print('oh no!')
a / 0 # this prints a RuntimeWarning as usual
In my original example I had a = np.r_[0]
, but apparently there was a change in numpy's behaviour such that division-by-zero is handled differently in cases where the numerator is all-zeros. For example, in numpy 1.16.4:
all_zeros = np.array([0., 0.])
not_all_zeros = np.array([1., 0.])
with np.errstate(divide='raise'):
not_all_zeros / 0. # Raises FloatingPointError
with np.errstate(divide='raise'):
all_zeros / 0. # No exception raised
with np.errstate(invalid='raise'):
all_zeros / 0. # Raises FloatingPointError
The corresponding warning messages are also different: 1. / 0.
is logged as RuntimeWarning: divide by zero encountered in true_divide
, whereas 0. / 0.
is logged as RuntimeWarning: invalid value encountered in true_divide
. I'm not sure why exactly this change was made, but I suspect it has to do with the fact that the result of 0. / 0.
is not representable as a number (numpy returns a NaN in this case) whereas 1. / 0.
and -1. / 0.
return +Inf and -Inf respectively, per the IEE 754 standard.
If you want to catch both types of error you can always pass np.errstate(divide='raise', invalid='raise')
, or all='raise'
if you want to raise an exception on any kind of floating point error.
Python evaluates expressions from left to right. Notice that while evaluating an assignment, the right-hand side is evaluated before the left-hand side.
That means the following for the expression a,b = b,a
:
b,a
is evaluated, that is to say, a tuple of two elements is created in the memory. The two elements are the objects designated by the identifiers b
and a
, that were existing before the instruction is encountered during the execution of the program.a
be assigned to the first element of the tuple (which is the object that was formerly b before the swap because it had name b
)b
is assigned to the second element of the tuple (which is the object that was formerly a before the swap because its identifiers was a
)This mechanism has effectively swapped the objects assigned to the identifiers a
and b
So, to answer your question: YES, it's the standard way to swap two identifiers on two objects.
By the way, the objects are not variables, they are objects.
The accepted answer uses the observable to retrieve the parameter which can be useful in the parameter will change throughtout the component lifecycle.
If the parameter will not change, one can consider using the params object on the snapshot of the router url.
snapshot.params
returns all the parameters in the URL in an object.
constructor(private route: ActivateRoute){}
ngOnInit() {
const allParams = this.route.snapshot.params // allParams is an object
const param1 = allParams.param1 // retrieve the parameter "param1"
}
Or purely HTML and CSS with no events:
<div style="z-index: 1; position: absolute;">
<a style="visibility: hidden;">Page link</a>
</div>
<a href="page.html">Page link</a>
document.querySelector('input[name=genderS]:checked').value
Either do it with CSS like the other answers did or change the text style color directly via the onMouseOver and onMouseOut event:
onmouseover="this.bgColor='white'; this.style.color='black'"
onmouseout="this.bgColor='black'; this.style.color='white'"
Try to check the limits of your SQL database. Maybe you'r exceeding the field limit for this row.
This is how I do it: CONVERT(NVARCHAR(10), DATE1, 103) )
Got the error (in the function init) with the following code ;
"use strict" ;
var hdr ;
function init(){ // called on load
hdr = document.getElementById("hdr");
}
... while using the stock browser on a Samsung galaxy Fame ( crap phone which makes it a good tester ) - userAgent ; Mozilla/5.0 (Linux; U; Android 4.1.2; en-gb; GT-S6810P Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30
The same code works everywhere else I tried including the stock browser on an older HTC phone - userAgent ; Mozilla/5.0 (Linux; U; Android 2.3.5; en-gb; HTC_WildfireS_A510e Build/GRJ90) AppleWebKit/533.1 (KHTML, like Gecko) Version/4.0 Mobile Safari/533.1
The fix for this was to change
var hdr ;
to
var hdr = null ;
Correct me if I'm wrong, but this seems like the simplest way (for one argument, anyway):
function myFunction(Required,Optional)
{
if (arguments.length<2) Optional = "Default";
//Your code
}
In the project navigator, select your project.
Select your target.
Select the "Build Phases" tab.
expander. Click the + button.
Select your framework.
(optional) Drag and drop the added framework to the "Frameworks" group.
Try to change where Member class
public function users() {
return $this->hasOne('User');
}
return $this->belongsTo('User');
select Country_id,country_title from(
select Country_id,country_title,row_number() over (partition by country_title
order by Country_id ) rn from country)a
where rn=1;
CURLOPT_POSTFIELDS
as the name suggests, is for the body (payload) of a POST
request. For GET
requests, the payload is part of the URL in the form of a query string.
In your case, you need to construct the URL with the arguments you need to send (if any), and remove the other options to cURL.
curl_setopt($ch, CURLOPT_URL, $this->service_url.'user/'.$id_user);
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
curl_setopt($ch, CURLOPT_HEADER, 0);
//$body = '{}';
//curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "GET");
//curl_setopt($ch, CURLOPT_POSTFIELDS,$body);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
Yes, that is fully possible (i.e. I do exactly this); you just need to reference the right dll (System.ServiceProcess.dll) and add an installer class...
[RunInstaller(true)]
public sealed class MyServiceInstallerProcess : ServiceProcessInstaller
{
public MyServiceInstallerProcess()
{
this.Account = ServiceAccount.NetworkService;
}
}
[RunInstaller(true)]
public sealed class MyServiceInstaller : ServiceInstaller
{
public MyServiceInstaller()
{
this.Description = "Service Description";
this.DisplayName = "Service Name";
this.ServiceName = "ServiceName";
this.StartType = System.ServiceProcess.ServiceStartMode.Automatic;
}
}
static void Install(bool undo, string[] args)
{
try
{
Console.WriteLine(undo ? "uninstalling" : "installing");
using (AssemblyInstaller inst = new AssemblyInstaller(typeof(Program).Assembly, args))
{
IDictionary state = new Hashtable();
inst.UseNewContext = true;
try
{
if (undo)
{
inst.Uninstall(state);
}
else
{
inst.Install(state);
inst.Commit(state);
}
}
catch
{
try
{
inst.Rollback(state);
}
catch { }
throw;
}
}
}
catch (Exception ex)
{
Console.Error.WriteLine(ex.Message);
}
}
Demo link: https://github.com/RazvanSebastian/spring_multiple_log_files_demo.git
My solution is based on XML configuration using spring-boot-starter-log4j
. The example is a basic example using spring-boot-starter
and the two Loggers writes into different log files.
A solution improving on the great one from @sparrow.
Let df, be your dataset, and mylist the list with the values you want to add to the dataframe.
Let's suppose you want to call your new column simply, new_column
First make the list into a Series:
column_values = pd.Series(mylist)
Then use the insert function to add the column. This function has the advantage to let you choose in which position you want to place the column. In the following example we will position the new column in the first position from left (by setting loc=0)
df.insert(loc=0, column='new_column', value=column_values)
The accepted answer is problematic for http urls. Moreover Uri.LocalPath
does Windows specific conversions, and as someone pointed out leaves query strings in there. A better way is to use Uri.AbsolutePath
The correct way to do this for http urls is:
Uri uri = new Uri(hreflink);
string filename = System.IO.Path.GetFileName(uri.AbsolutePath);
As Robert pointed out, quotation marks might do the trick for you:
git stash pop stash@"{1}"
If you're able to successfully load a page from Eclipses internal web browser (by going to "Window"=>"Show View"=>"Other"=>"Internal Web Browser" and trying to open a page) BUT installing software from the eclipse marketplace and the "Help"=>"Install New Software" window are not working then this fix may help you (worked for me on a Windows 7 machine):
this worked for me for c#
if (enableEndDateCheckBox.Checked == true)
{
endDateDateTimePicker.Enabled = true;
endDateDateTimePicker.Format = DateTimePickerFormat.Short;
}
else
{
endDateDateTimePicker.Enabled = false;
endDateDateTimePicker.Format = DateTimePickerFormat.Custom;
endDateDateTimePicker.CustomFormat = " ";
}
nice one guys!
You should make use of the DateTime and DateInterval classes in Php, and things will turn to be very easy and readable.
Example: Lets get the previous day.
// always make sure to have set your default timezone
date_default_timezone_set('Europe/Berlin');
// create DateTime instance, holding the current datetime
$datetime = new DateTime();
// create one day interval
$interval = new DateInterval('P1D');
// modify the DateTime instance
$datetime->sub($interval);
// display the result, or print_r($datetime); for more insight
echo $datetime->format('Y-m-d');
/**
* TIP:
* if you dont want to change the default timezone, use
* use the DateTimeZone class instead.
*
* $myTimezone = new DateTimeZone('Europe/Berlin');
* $datetime->setTimezone($myTimezone);
*
* or just include it inside the constructor
* in this form new DateTime("now", $myTimezone);
*/
References: Modern PHP, New Features and Good Practices By Josh Lockhart
Another cause of "TCP ACKed Unseen" is the number of packets that may get dropped in a capture. If I run an unfiltered capture for all traffic on a busy interface, I will sometimes see a large number of 'dropped' packets after stopping tshark.
On the last capture I did when I saw this, I had 2893204 packets captured, but once I hit Ctrl-C, I got a 87581 packets dropped message. Thats a 3% loss, so when wireshark opens the capture, its likely to be missing packets and report "unseen" packets.
As I mentioned, I captured a really busy interface with no capture filter, so tshark had to sort all packets, when I use a capture filter to remove some of the noise, I no longer get the error.
OK, I've solved this with some help from ES support. Issue the following command to the API on all nodes (or the nodes you believe to be the cause of the problem):
curl -XPUT 'localhost:9200/<index>/_settings' \
-d '{"index.routing.allocation.disable_allocation": false}'
where <index>
is the index you believe to be the culprit. If you have no idea, just run this on all nodes:
curl -XPUT 'localhost:9200/_settings' \
-d '{"index.routing.allocation.disable_allocation": false}'
I also added this line to my yaml config and since then, any restarts of the server/service have been problem free. The shards re-allocated back immediately.
FWIW, to answer an oft sought after question, set MAX_HEAP_SIZE to 30G unless your machine has less than 60G RAM, in which case set it to half the available memory.
Having javascript:
in any attribute that isn't specifically for scripting is an outdated method of HTML. While technically it works, you're still assigning javascript properties to a non-script attribute, which isn't good practice. It can even fail on old browsers, or even some modern ones (a googled forum post seemd to indicate that Opera does not like 'javascript:' urls).
A better practice would be the second way, to put your javascript into the onclick
attribute, which is ignored if no scripting functionality is available. Place a valid URL in the href field (commonly '#') for fallback for those who do not have javascript.
Create an IBOutlet of NSLayoutConstraint of yourView and update the constant value accordingly the condition specifies.
//Connect them from Interface
@IBOutlet viewHeight: NSLayoutConstraint!
@IBOutlet view: UIView!
private func updateViewHeight(height:Int){
guard let aView = view, aViewHeight = viewHeight else{
return
}
aViewHeight.constant = height
aView.layoutIfNeeded()
}
a couple years down the road, I'd vote for three.js because
ie 11 supports webgl (to what extent I can't assure you since i'm usually in chrome)
and, as far as importing external models into three.js, here's a link to mrdoob's updated loaders (so many!)
UPDATE nov 2019: the THREE.js loaders are now far more and it makes little sense to post them all: just go to this link
http://threejs.org/examples and review the loaders - at least 20 of them
I can't guarantee it's the simplest, but I like MarkerWithLabel. As shown in the basic example, CSS styles define the label's appearance and options in the JavaScript define the content and placement.
.labels {
color: red;
background-color: white;
font-family: "Lucida Grande", "Arial", sans-serif;
font-size: 10px;
font-weight: bold;
text-align: center;
width: 60px;
border: 2px solid black;
white-space: nowrap;
}
JavaScript:
var marker = new MarkerWithLabel({
position: homeLatLng,
draggable: true,
map: map,
labelContent: "$425K",
labelAnchor: new google.maps.Point(22, 0),
labelClass: "labels", // the CSS class for the label
labelStyle: {opacity: 0.75}
});
The only part that may be confusing is the labelAnchor. By default, the label's top left corner will line up to the marker pushpin's endpoint. Setting the labelAnchor's x-value to half the width defined in the CSS width property will center the label. You can make the label float above the marker pushpin with an anchor point like new google.maps.Point(22, 50)
.
In case access to the links above are blocked, I copied and pasted the packed source of MarkerWithLabel into this JSFiddle demo. I hope JSFiddle is allowed in China :|
Use n module from npm in order to upgrade node
sudo npm cache clean -f
sudo npm install -g n
sudo n stable
To upgrade to latest version (and not current stable) version, you can use
sudo n latest
Undo :
sudo apt-get install --reinstall nodejs-legacy # fix /usr/bin/node sudo n rm 6.0.0 # replace number with version of Node that was installed sudo npm uninstall -g n
I know I am late to the party, but how about this?
const char* dayNames[] = { [Sunday] = "Sunday", [Monday] = "Monday", /*and so on*/ };
printf("%s", dayNames[Sunday]); // prints "Sunday"
This way, you do not have to manually keep the enum
and the char*
array in sync. If you are like me, chances are that you will later change the enum
, and the char*
array will print invalid strings.
This may not be a feature universally supported. But afaik, most of the mordern day C compilers support this designated initialier style.
You can read more about designated initializers here.
It might be the problem if you have your home directory mounted somewhere, due nvm does not work properly with symlinks. Because I don't care where is my $NVM_DIR located I run this and all works fine:
$ mv ~/.nvm /tmp/
$ export NVM_DIR="/tmp/.nvm"
$ nvm use --delete-prefix v6.9.1
Example for String Methods
Given a list of filenames, we want to rename all the files with extension hpp to the extension h. To do this, we would like to generate a new list called newfilenames, consisting of the new filenames. Fill in the blanks in the code using any of the methods you’ve learned thus far, like a for loop or a list comprehension.
filenames = ["program.c", "stdio.hpp", "sample.hpp", "a.out", "math.hpp", "hpp.out"]
# Generate newfilenames as a list containing the new filenames
# using as many lines of code as your chosen method requires.
newfilenames = []
for i in filenames:
if i.endswith(".hpp"):
x = i.replace("hpp", "h")
newfilenames.append(x)
else:
newfilenames.append(i)
print(newfilenames)
# Should be ["program.c", "stdio.h", "sample.h", "a.out", "math.h", "hpp.out"]
SELECT GETVARIABLE('SYSIBM.VERSION') FROM SYSIBM.SYSDUMMY1
Since the problem does not specify that we have to find the smallest possible number that is not in the file we could just generate a number that is longer than the input file itself. :)
On my mac osx yosemite 10.10. This command worked:
sudo launchctl load -w /Library/LaunchDaemons/com.mysql.mysql.plist
sudo launchctl unload -w /Library/LaunchDaemons/com.mysql.mysql.plist
You can find your mysql file in folder /Library/LaunchDaemons/ to run
Route::group(['middleware' => 'web'], function () {
Route::auth();
Route::get('/', ['as' => 'home', 'uses' => 'BaseController@index']);
Route::group(['namespace' => 'User', 'prefix' => 'user'], function(){
Route::get('{nickname}/settings', ['as' => 'user.settings', 'uses' => 'SettingsController@index']);
Route::get('{nickname}/profile', ['as' => 'user.profile', 'uses' => 'ProfileController@index']);
});
});
Or simply:
Date.now
From MDN documentation:
The Date.now() method returns the number of milliseconds elapsed since January 1, 1970
Available since ECMAScript 5.1
It's the same as was mentioned above (new Date().getTime()
), but more shortcutted version.
There are three way to generate unique id in java.
1) the UUID class provides a simple means for generating unique ids.
UUID id = UUID.randomUUID();
System.out.println(id);
2) SecureRandom and MessageDigest
//initialization of the application
SecureRandom prng = SecureRandom.getInstance("SHA1PRNG");
//generate a random number
String randomNum = new Integer(prng.nextInt()).toString();
//get its digest
MessageDigest sha = MessageDigest.getInstance("SHA-1");
byte[] result = sha.digest(randomNum.getBytes());
System.out.println("Random number: " + randomNum);
System.out.println("Message digest: " + new String(result));
3) using a java.rmi.server.UID
UID userId = new UID();
System.out.println("userId: " + userId);
concept = concept.encode('ascii', 'ignore')
concept = MySQLdb.escape_string(concept.decode('latin1').encode('utf8').rstrip())
I do this, I am not sure if that is a good approach but it works everytime !!
Your test is good, but it measures only some specific situation: we have one polygon with many vertices, and long array of points to check them within polygon.
Moreover, I suppose that you're measuring not matplotlib-inside-polygon-method vs ray-method, but matplotlib-somehow-optimized-iteration vs simple-list-iteration
Let's make N independent comparisons (N pairs of point and polygon)?
# ... your code...
lenpoly = 100
polygon = [[np.sin(x)+0.5,np.cos(x)+0.5] for x in np.linspace(0,2*np.pi,lenpoly)[:-1]]
M = 10000
start_time = time()
# Ray tracing
for i in range(M):
x,y = np.random.random(), np.random.random()
inside1 = ray_tracing_method(x,y, polygon)
print "Ray Tracing Elapsed time: " + str(time()-start_time)
# Matplotlib mplPath
start_time = time()
for i in range(M):
x,y = np.random.random(), np.random.random()
inside2 = path.contains_points([[x,y]])
print "Matplotlib contains_points Elapsed time: " + str(time()-start_time)
Result:
Ray Tracing Elapsed time: 0.548588991165
Matplotlib contains_points Elapsed time: 0.103765010834
Matplotlib is still much better, but not 100 times better. Now let's try much simpler polygon...
lenpoly = 5
# ... same code
result:
Ray Tracing Elapsed time: 0.0727779865265
Matplotlib contains_points Elapsed time: 0.105288982391
This problem can also come up when you don't have your constructor immediately call super.
So this will work:
public Employee(String name, String number, Date date)
{
super(....)
}
But this won't:
public Employee(String name, String number, Date date)
{
// an example of *any* code running before you call super.
if (number < 5)
{
number++;
}
super(....)
}
The reason the 2nd example fails is because java is trying to implicitely call
super(name,number,date)
as the first line in your constructor.... So java doesn't see that you've got a call to super going on later in the constructor. It essentially tries to do this:
public Employee(String name, String number, Date date)
{
super(name, number, date);
if (number < 5)
{
number++;
}
super(....)
}
So the solution is pretty easy... Just don't put code before your super call ;-) If you need to initialize something before the call to super, do it in another constructor, and then call the old constructor... Like in this example pulled from this StackOverflow post:
public class Foo
{
private int x;
public Foo()
{
this(1);
}
public Foo(int x)
{
this.x = x;
}
}
You need to iterate both the groups and the items. $.each() takes a collection as first parameter and data.response.venue.tips.groups.items.text
tries to point to a string. Both groups
and items
are arrays.
Verbose version:
$.getJSON(url, function (data) {
// Iterate the groups first.
$.each(data.response.venue.tips.groups, function (index, value) {
// Get the items
var items = this.items; // Here 'this' points to a 'group' in 'groups'
// Iterate through items.
$.each(items, function () {
console.log(this.text); // Here 'this' points to an 'item' in 'items'
});
});
});
Or more simply:
$.getJSON(url, function (data) {
$.each(data.response.venue.tips.groups, function (index, value) {
$.each(this.items, function () {
console.log(this.text);
});
});
});
In the JSON you specified, the last one would be:
$.getJSON(url, function (data) {
// Get the 'items' from the first group.
var items = data.response.venue.tips.groups[0].items;
// Find the last index and the last item.
var lastIndex = items.length - 1;
var lastItem = items[lastIndex];
console.log("User: " + lastItem.user.firstName + " " + lastItem.user.lastName);
console.log("Date: " + lastItem.createdAt);
console.log("Text: " + lastItem.text);
});
This would give you:
User: Damir P.
Date: 1314168377
Text: ajd da vidimo hocu li znati ponoviti
I found a fix...
.text {
font-size: 15px; /* for firefox */
*font-size: 90%; /* % restart the antialiasing for ie, note the * hack */
font-weight: bold; /* needed, don't know why! */
}
The equivalent command in svn is:
svn log --diff -r revision
In Reactive Form, there are 2 primary solutions to update value(s) of form field(s).
Initialize Model Structure in Constructor:
this.newForm = this.formBuilder.group({
firstName: ['', [Validators.required, Validators.minLength(3), Validators.maxLength(8)]],
lastName: ['', [Validators.required, Validators.minLength(3), Validators.maxLength(8)]]
});
If you want to update all fields of form:
this.newForm.setValue({
firstName: 'abc',
lastName: 'def'
});
If you want to update specific field of form:
this.newForm.controls.firstName.setValue('abc');
Note: It’s mandatory to provide complete model structure for all form field controls within the FormGroup. If you miss any property or subset collections, then it will throw an exception.
If you want to update some/ specific fields of form:
this.newForm.patchValue({
firstName: 'abc'
});
Note: It’s not mandatory to provide model structure for all/ any form field controls within the FormGroup. If you miss any property or subset collections, then it will not throw any exception.
Yes, I believe you are creating thousands of objects. If you're looking for an easy way to delete a bunch of them at once, use canvas tags described here. This lets you perform the same operation (such as deletion) on a large number of objects.
For Eclipse Mars use the similar approach as harshit.
1) Help -> Install New Software
2) Use url: http://download.oracle.com/otn_software/oepe/mars repository Above is the OEPE tool provided by oracle for EE development.
3) From all the suggestions, select Glassfish Tools, (Oracle Weblogic Server Tools, Oracle Weblogic Scripting Tools, Oracle patches, Oracle Maven Tools).
4) Install it.
5) Restart eclipse
In point 3) are 4 tools are in braces, I don't know minimal combination, but only install Glassfish Tools has no effect.
During restart Oepe ask for Java 8 JDK if Eclipse run on on older version.
Eclipse 4.5.0 Mars JDK : 1.8
This was originally discussed in the jQuery UI documentation for Accordion:
NOTE: If you want multiple sections open at once, don't use an accordion
An accordion doesn't allow more than one content panel to be open at the same time, and it takes a lot of effort to do that. If you are looking for a widget that allows more than one content panel to be open, don't use this. Usually it can be written with a few lines of jQuery instead, something like this:
jQuery(document).ready(function(){ $('.accordion .head').click(function() { $(this).next().toggle(); return false; }).next().hide(); });
Or animated:
jQuery(document).ready(function(){ $('.accordion .head').click(function() { $(this).next().toggle('slow'); return false; }).next().hide(); });
"I may be an idiot" - You're not an idiot if you don't read the documentation, but if you're having problems, it usually speeds up finding a solution.
You need to make the same method name both in layout XML and java code.
If you use android:onClick="setLogin"
then you need to make a method with the same name, setLogin:
// Please be noted that you need to add the "View v" parameter
public void setLogin(View v) {
}
ADVICE:
Do not mix layout with code by using android:onClick
tag in your XML. Instead, move the click method to your class with OnClickListener
method like:
Button button = (Button) findViewById(R.id.button1);
button.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
}
});
Make a layout just for layout and no more. It will save your precious time when you need to refactoring for Supporting Multiple Screens.
Here is an example how I do it.
import javax.ws.rs.client.ClientBuilder;
import javax.ws.rs.client.Entity;
import javax.ws.rs.client.WebTarget;
import javax.ws.rs.core.MultivaluedHashMap;
import javax.ws.rs.core.MultivaluedMap;
import java.util.Map;
import java.lang.reflect.Type;
import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;
Gson gson = new Gson();
Type type = new TypeToken<Map<String, String>>() {
}.getType();
MultivaluedMap<String, String> formData = new MultivaluedHashMap<String, String>();
formData.add("key1", "value1");
formData.add("key1", "value2");
WebTarget webTarget = ClientBuilder.newClient().target("https://some.server.url/");
String response = webTarget.path("subpath/subpath2").request().post(Entity.form(formData), String.class);
Map<String, String> gsonResponse = gson.fromJson(response, type);
There are a plethora of ways in which this can be done. The problem is how to make R aware of the locations of the variables you wish to divide.
Assuming
d <- read.table(text = "263807.0 1582
196190.5 1016
586689.0 3479
")
names(d) <- c("min", "count2.freq")
> d
min count2.freq
1 263807.0 1582
2 196190.5 1016
3 586689.0 3479
To add the desired division as a third variable I would use transform()
> d <- transform(d, new = min / count2.freq)
> d
min count2.freq new
1 263807.0 1582 166.7554
2 196190.5 1016 193.1009
3 586689.0 3479 168.6373
If doing this in a function (i.e. you are programming) then best to avoid the sugar shown above and index. In that case any of these would do what you want
## 1. via `[` and character indexes
d[, "new"] <- d[, "min"] / d[, "count2.freq"]
## 2. via `[` with numeric indices
d[, 3] <- d[, 1] / d[, 2]
## 3. via `$`
d$new <- d$min / d$count2.freq
All of these can be used at the prompt too, but which is easier to read:
d <- transform(d, new = min / count2.freq)
or
d$new <- d$min / d$count2.freq ## or any of the above examples
Hopefully you think like I do and the first version is better ;-)
The reason we don't use the syntactic sugar of tranform()
et al when programming is because of how they do their evaluation (look for the named variables). At the top level (at the prompt, working interactively) transform()
et al work just fine. But buried in function calls or within a call to one of the apply()
family of functions they can and often do break.
Likewise, be careful using numeric indices (## 2.
above); if you change the ordering of your data, you will select the wrong variables.
If you are just wanting to do the division (rather than insert the result back into the data frame, then use with()
, which allows us to isolate the simple expression you wish to evaluate
> with(d, min / count2.freq)
[1] 166.7554 193.1009 168.6373
This is again much cleaner code than the equivalent
> d$min / d$count2.freq
[1] 166.7554 193.1009 168.6373
as it explicitly states that "using d
, execute the code min / count2.freq
. Your preference may be different to mine, so I have shown all options.
Try this:
var duration = moment.duration({'days' : 1});
moment().subtract(duration).format('DD-MM-YYYY');
This will give you 14-04-2015
- today is 15-04-2015
Alternatively if your momentjs version is less than 2.8.0, you can use:
startdate = moment().subtract('days', 1).format('DD-MM-YYYY');
Instead of this:
startdate = moment().subtract(1, 'days').format('DD-MM-YYYY');
The explanation below is using the case of a fully balanced binary tree to help you understand how we get logarithmic time complexity.
Binary tree is a case where a problem of size n is divided into sub-problem of size n/2 until we reach a problem of size 1:
And that's how you get O(log n) which is the amount of work that needs to be done on the above tree to reach a solution.
A common algorithm with O(log n) time complexity is Binary Search whose recursive relation is T(n/2) + O(1) i.e. at every subsequent level of the tree you divide problem into half and do constant amount of additional work.
In JSFiddle, when you set the wrapping to "onLoad" or "onDomready", the functions you define are only defined inside that block, and cannot be accessed by outside event handlers.
Easiest fix is to change:
function something(...)
To:
window.something = function(...)
You can use the CSS3 Linear Gradient property along with your background-image like this:
#landing-wrapper {
display:table;
width:100%;
background: linear-gradient( rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5) ), url('landingpagepic.jpg');
background-position:center top;
height:350px;
}
Here's a demo:
#landing-wrapper {_x000D_
display: table;_x000D_
width: 100%;_x000D_
background: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), url('http://placehold.it/350x150');_x000D_
background-position: center top;_x000D_
height: 350px;_x000D_
color: white;_x000D_
}
_x000D_
<div id="landing-wrapper">Lorem ipsum dolor ismet.</div>
_x000D_
.carousel-inner > .item > img {
margin: 0 auto;
}
This simple solution worked for me
To view entries in Drupal's own internal log system (the watchdog
database table), go to http://example.com/admin/reports/dblog. These can include Drupal-specific errors as well as general PHP or MySQL errors that have been thrown.
Use the watchdog()
function to add an entry to this log from your own custom module.
When Drupal bootstraps it uses the PHP function set_error_handler()
to set its own error handler for PHP errors. Therefore, whenever a PHP error occurs within Drupal it will be logged through the watchdog()
call at admin/reports/dblog
. If you look for PHP fatal errors, for example, in /var/log/apache/error.log
and don't see them, this is why. Other errors, e.g. Apache errors, should still be logged in /var/log
, or wherever you have it configured to log to.
function Do-SendKeys {
param (
$SENDKEYS,
$WINDOWTITLE
)
$wshell = New-Object -ComObject wscript.shell;
IF ($WINDOWTITLE) {$wshell.AppActivate($WINDOWTITLE)}
Sleep 1
IF ($SENDKEYS) {$wshell.SendKeys($SENDKEYS)}
}
Do-SendKeys -WINDOWTITLE Print -SENDKEYS '{TAB}{TAB}'
Do-SendKeys -WINDOWTITLE Print
Do-SendKeys -SENDKEYS '%{f4}'
I use @gnarf's method, though I fall back on document.writeln
ing a <script>
tag for IE<7 as I couldn't get DOM creation to work reliably in IE6 (and TBH didn't care enough to put much effort into it). The core of my code is:
if (horus.script.broken) {
document.writeln('<script type="text/javascript" src="'+script+'"></script>');
horus.script.loaded(script);
} else {
var s=document.createElement('script');
s.type='text/javascript';
s.src=script;
s.async=true;
if (horus.brokenDOM){
s.onreadystatechange=
function () {
if (this.readyState=='loaded' || this.readyState=='complete'){
horus.script.loaded(script);
}
}
}else{
s.onload=function () { horus.script.loaded(script) };
}
document.head.appendChild(s);
}
where horus.script.loaded()
notes that the javascript file is loaded, and calls any pending uncalled routines (saved by autoloader code).
this gives you the Xact;
System.Data.SqlClient.SqlConnectionStringBuilder connBuilder = new System.Data.SqlClient.SqlConnectionStringBuilder();
connBuilder.ConnectionString = connectionString;
string server = connBuilder.DataSource; //-> this gives you the Server name.
string database = connBuilder.InitialCatalog; //-> this gives you the Db name.
The instructions by peter_budo worked perfectly. I had to add the jars under /Library/Java/JavaVirtualMachines/JDK 1.7.0 Developer Preview.jdk/Contents/Home/jre/lib/ to my IntelliJ project libraries. Now it works like a charm. Note that I didn't need my IDE itself to run under 1.7; rather, I only needed to be able to compile and run against 1.7. I'll most likely continue to use Apple's JRE for running the IDE since it's probably more stable with respect to graphics routines (Swing, AWT). Like the OP, I was really keen on testing out the new NIO2 API. Looking good so far. Thanks, Peter.
Strings do have a length method: __len__()
The protocol in Python is to implement this method on objects which have a length and use the built-in len()
function, which calls it for you, similar to the way you would implement __iter__()
and use the built-in iter()
function (or have the method called behind the scenes for you) on objects which are iterable.
See Emulating container types for more information.
Here's a good read on the subject of protocols in Python: Python and the Principle of Least Astonishment
I assume your XML response looks like this:
var xml = @"<names>
<name>
foo
</name>
<name>
bar
</name>
</names>";
The best way to process XML is to use an XML parser, such as LINQ to XML:
var doc = XDocument.Parse(xml);
var containsFoo = doc.Root
.Elements("name")
.Any(e => ((string)e).Trim() == "foo");
Columns("A:E").Select
Can be directly replaced by
Columns(1).Resize(, 5).EntireColumn.Select
Where 1 can be replaced by a variable
n = 5
Columns(n).Resize(, n+4).EntireColumn.Select
In my opinion you are best dealing with a block of columns rather than looping through columns n to n + 4 as it is more efficient.
In addition, using select will slow your code down. So instead of selecting your columns and then performing an action on the selection try instead to perform the action directly. Below is an example to change the colour of columns A-E to yellow.
Columns(1).Resize(, 5).EntireColumn.Interior.Color = 65535
With HTML5's support for svg
, you don't need to rely on shadow hacks.
<svg width="100%" viewBox="0 0 600 100">_x000D_
<text x=0 y=20 font-size=12pt fill=white stroke=black stroke-width=0.75>_x000D_
This text exposes its vector representation, _x000D_
making it easy to style shape-wise without hacks. _x000D_
HTML5 supports it, so no browser issues. Only downside _x000D_
is that svg has its own quirks and learning curve _x000D_
(c.f. bounding box issue/no typesetting by default)_x000D_
</text>_x000D_
</svg>
_x000D_
I may be misunderstanding your question but it seems you should just be able to use a relative path as long as the production and development servers use the same path structure.
<script language="javascript" src="js/myLib.js" />
Try it with Mysqldump
#mysqldump --host=the.remotedatabase.com -u yourusername -p yourdatabasename > /User/backups/adump.sql
Following up on farktronix's suggestion, we have been using Jira ticket numbers for similar in mercurial, and I'm planning to continue using them for git branches. But I think the ticket number itself is probably unique enough. While it might be helpful to have a descriptive word in the branch name as farktronix noted, if you are switching between branches often enough, you probably want less to type. Then if you need to know the branch name, look in Jira for the associated keywords in the ticket if you don't know it. In addition, you should include the ticket number in each comment.
If your branch represents a version, it appears that the common convention is to use x.x.x (example: "1.0.0") format for branch names and vx.x.x (example "v1.0.0") for tag names (to avoid conflict). See also: is-there-an-standard-naming-convention-for-git-tags
C++11 added alias declarations, which are generalization of typedef
, allowing templates:
template <size_t N>
using Vector = Matrix<N, 1>;
The type Vector<3>
is equivalent to Matrix<3, 1>
.
In C++03, the closest approximation was:
template <size_t N>
struct Vector
{
typedef Matrix<N, 1> type;
};
Here, the type Vector<3>::type
is equivalent to Matrix<3, 1>
.
First, you need to convert your string to NSDate with its format. Then, you change the dateFormatter
to your simple format and convert it back to a String.
Swift 3
let dateString = "Thu, 22 Oct 2015 07:45:17 +0000"
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "EEE, dd MMM yyyy hh:mm:ss +zzzz"
dateFormatter.locale = Locale.init(identifier: "en_GB")
let dateObj = dateFormatter.date(from: dateString)
dateFormatter.dateFormat = "MM-dd-yyyy"
print("Dateobj: \(dateFormatter.string(from: dateObj!))")
The printed result is: Dateobj: 10-22-2015
Docker provides a couple of examples on how to do it. The lightweight option is to:
Put all of your commands in a wrapper script, complete with testing and debugging information. Run the wrapper script as your
CMD
. This is a very naive example. First, the wrapper script:
#!/bin/bash
# Start the first process
./my_first_process -D
status=$?
if [ $status -ne 0 ]; then
echo "Failed to start my_first_process: $status"
exit $status
fi
# Start the second process
./my_second_process -D
status=$?
if [ $status -ne 0 ]; then
echo "Failed to start my_second_process: $status"
exit $status
fi
# Naive check runs checks once a minute to see if either of the processes exited.
# This illustrates part of the heavy lifting you need to do if you want to run
# more than one service in a container. The container will exit with an error
# if it detects that either of the processes has exited.
# Otherwise it will loop forever, waking up every 60 seconds
while /bin/true; do
ps aux |grep my_first_process |grep -q -v grep
PROCESS_1_STATUS=$?
ps aux |grep my_second_process |grep -q -v grep
PROCESS_2_STATUS=$?
# If the greps above find anything, they will exit with 0 status
# If they are not both 0, then something is wrong
if [ $PROCESS_1_STATUS -ne 0 -o $PROCESS_2_STATUS -ne 0 ]; then
echo "One of the processes has already exited."
exit -1
fi
sleep 60
done
Next, the Dockerfile:
FROM ubuntu:latest
COPY my_first_process my_first_process
COPY my_second_process my_second_process
COPY my_wrapper_script.sh my_wrapper_script.sh
CMD ./my_wrapper_script.sh
I just figured it out! What I did was I created the batch file like I had it originally:
net use P: "\\server\foldername\foldername"
I then saved it to the desktop and right clicked the properties and checked run as administrator. I then copied the file to C:\Users\"TheUser"\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup
Where "TheUser" was the desired user I wanted to add it to.
As per my observation like two cases, if a table has less then 100,000 records then the join will work fast.
But in the case that a table has more than 100,000 records then a subquery is best result.
I have one table that has 500,000 records on that I created below query and its result time is like
SELECT *
FROM crv.workorder_details wd
inner join crv.workorder wr on wr.workorder_id = wd.workorder_id;
Result : 13.3 Seconds
select *
from crv.workorder_details
where workorder_id in (select workorder_id from crv.workorder)
Result : 1.65 Seconds
I've been working on a function to work within a library for a client, and have been having a lot of trouble keeping the UI responsive during the sorts (even with only a few hundred results).
The function has to resort the entire table each AJAX pagination, as new data may require injection further up. This is what I had so far:
table
is the ID of the table being sorted.sort-attribute
, sort-direction
and the column attribute column
are all pre-set.Using some of the details above I managed to improve performance a bit.
function sorttable(table) {
var context = $('#' + table), tbody = $('#' + table + ' tbody'), sortfield = $(context).data('sort-attribute'), c, dir = $(context).data('sort-direction'), index = $(context).find('thead th[data-column="' + sortfield + '"]').index();
if (!sortfield) {
sortfield = $(context).data('id-attribute');
};
switch (dir) {
case "asc":
tbody.find('tr').sort(function (a, b) {
var sortvala = parseFloat($(a).find('td:eq(' + index + ')').text());
var sortvalb = parseFloat($(b).find('td:eq(' + index + ')').text());
// if a < b return 1
return sortvala < sortvalb ? 1
// else if a > b return -1
: sortvala > sortvalb ? -1
// else they are equal - return 0
: 0;
}).appendTo(tbody);
break;
case "desc":
default:
tbody.find('tr').sort(function (a, b) {
var sortvala = parseFloat($(a).find('td:eq(' + index + ')').text());
var sortvalb = parseFloat($(b).find('td:eq(' + index + ')').text());
// if a < b return 1
return sortvala > sortvalb ? 1
// else if a > b return -1
: sortvala < sortvalb ? -1
// else they are equal - return 0
: 0;
}).appendTo(tbody);
break;
}
In principle the code works perfectly, but it's painfully slow... are there any ways to improve performance?
You may use the SPOOL command to write the information to a file.
Before executing any command type the following:
SPOOL <output file path>
All commands output following will be written to the output file.
To stop command output writing type
SPOOL OFF
The value of hjust
and vjust
are only defined between 0 and 1:
Source: ggplot2, Hadley Wickham, page 196
(Yes, I know that in most cases you can use it beyond this range, but don't expect it to behave in any specific way. This is outside spec.)
hjust
controls horizontal justification and vjust
controls vertical justification.
An example should make this clear:
td <- expand.grid(
hjust=c(0, 0.5, 1),
vjust=c(0, 0.5, 1),
angle=c(0, 45, 90),
text="text"
)
ggplot(td, aes(x=hjust, y=vjust)) +
geom_point() +
geom_text(aes(label=text, angle=angle, hjust=hjust, vjust=vjust)) +
facet_grid(~angle) +
scale_x_continuous(breaks=c(0, 0.5, 1), expand=c(0, 0.2)) +
scale_y_continuous(breaks=c(0, 0.5, 1), expand=c(0, 0.2))
To understand what happens when you change the hjust
in axis text, you need to understand that the horizontal alignment for axis text is defined in relation not to the x-axis, but to the entire plot (where this includes the y-axis text). (This is, in my view, unfortunate. It would be much more useful to have the alignment relative to the axis.)
DF <- data.frame(x=LETTERS[1:3],y=1:3)
p <- ggplot(DF, aes(x,y)) + geom_point() +
ylab("Very long label for y") +
theme(axis.title.y=element_text(angle=0))
p1 <- p + theme(axis.title.x=element_text(hjust=0)) + xlab("X-axis at hjust=0")
p2 <- p + theme(axis.title.x=element_text(hjust=0.5)) + xlab("X-axis at hjust=0.5")
p3 <- p + theme(axis.title.x=element_text(hjust=1)) + xlab("X-axis at hjust=1")
library(ggExtra)
align.plots(p1, p2, p3)
To explore what happens with vjust
aligment of axis labels:
DF <- data.frame(x=c("a\na","b","cdefghijk","l"),y=1:4)
p <- ggplot(DF, aes(x,y)) + geom_point()
p1 <- p + theme(axis.text.x=element_text(vjust=0, colour="red")) +
xlab("X-axis labels aligned with vjust=0")
p2 <- p + theme(axis.text.x=element_text(vjust=0.5, colour="red")) +
xlab("X-axis labels aligned with vjust=0.5")
p3 <- p + theme(axis.text.x=element_text(vjust=1, colour="red")) +
xlab("X-axis labels aligned with vjust=1")
library(ggExtra)
align.plots(p1, p2, p3)
I found myself wanting to do this and I reviewed the above answers and did a hybrid approach of them. It got a little tricky, but here is what I did:
My button already worked with a server side post. I wanted to let that to continue to work so I left the "OnClick" the same, but added a OnClientClick:
OnClientClick="if (!OnClick_Submit()) return false;"
Here is my full button element in case it matters:
<asp:Button UseSubmitBehavior="false" runat="server" Class="ms-ButtonHeightWidth jiveSiteSettingsSubmit" OnClientClick="if (!OnClick_Submit()) return false;" OnClick="BtnSave_Click" Text="<%$Resources:wss,multipages_okbutton_text%>" id="BtnOK" accesskey="<%$Resources:wss,okbutton_accesskey%>" Enabled="true"/>
If I inspect the onclick attribute of the HTML button at runtime it actually looks like this:
if (!OnClick_Submit()) return false;WebForm_DoPostBackWithOptions(new WebForm_PostBackOptions("ctl00$PlaceHolderMain$ctl03$RptControls$BtnOK", "", true, "", "", false, true))
Then in my Javascript I added the OnClick_Submit method. In my case I needed to do a check to see if I needed to show a dialog to the user. If I show the dialog I return false causing the event to stop processing. If I don't show the dialog I return true causing the event to continue processing and my postback logic to run as it used to.
function OnClick_Submit() {
var initiallyActive = initialState.socialized && initialState.activityEnabled;
var socialized = IsSocialized();
var enabled = ActivityStreamsEnabled();
var displayDialog;
// Omitted the setting of displayDialog for clarity
if (displayDialog) {
$("#myDialog").dialog('open');
return false;
}
else {
return true;
}
}
Then in my Javascript code that runs when the dialog is accepted, I do the following depending on how the user interacted with the dialog:
$("#myDialog").dialog('close');
__doPostBack('message', '');
The "message" above is actually different based on what message I want to send.
Back in my server-side code, I changed OnLoad from:
protected override void OnLoad(EventArgs e)
{
base.OnLoad(e)
if (IsPostBack)
{
return;
}
// OnLoad logic removed for clarity
}
To:
protected override void OnLoad(EventArgs e)
{
base.OnLoad(e)
if (IsPostBack)
{
switch (Request.Form["__EVENTTARGET"])
{
case "message1":
// We did a __doPostBack with the "message1" command provided
Page.Validate();
BtnSave_Click(this, new CommandEventArgs("message1", null));
break;
case "message2":
// We did a __doPostBack with the "message2" command provided
Page.Validate();
BtnSave_Click(this, new CommandEventArgs("message2", null));
break;
}
return;
}
// OnLoad logic removed for clarity
}
Then in BtnSave_Click method I do the following:
CommandEventArgs commandEventArgs = e as CommandEventArgs;
string message = (commandEventArgs == null) ? null : commandEventArgs.CommandName;
And finally I can provide logic based on whether or not I have a message and based on the value of that message.
JSON syntax is pretty much the JavaScript syntax for coding your object. Therefore, in terms of conciseness and speed, your own answer is the best bet.
I use this approach when populating dropdown lists in my KnockoutJS model. E.g.
var desktopGrpViewModel = {
availableComputeOfferings: ko.observableArray(@Html.Raw(JsonConvert.SerializeObject(ViewBag.ComputeOfferings))),
desktopGrpComputeOfferingSelected: ko.observable(),
};
ko.applyBindings(desktopGrpViewModel);
...
<select name="ComputeOffering" class="form-control valid" id="ComputeOffering" data-val="true"
data-bind="options: availableComputeOffering,
optionsText: 'Name',
optionsValue: 'Id',
value: desktopGrpComputeOfferingSelect,
optionsCaption: 'Choose...'">
</select>
Note that I'm using Json.NET NuGet package for serialization and the ViewBag to pass data.
To adjust the length of the samples:
set key samplen X
(default is 4)
To adjust the vertical spacing of the samples:
set key spacing X
(default is 1.25)
and (for completeness), to adjust the fontsize:
set key font "<face>,<size>"
(default depends on the terminal)
And of course, all these can be combined into one line:
set key samplen 2 spacing .5 font ",8"
Note that you can also change the position of the key using set key at <position>
or any one of the pre-defined positions (which I'll just defer to help key
at this point)
SELECT replicate('0', 6 - len(employeeID)) + convert(varchar, employeeID) as employeeID
FROM dbo.RequestItems
WHERE ID=0
I already have answered here and it's working for me, please refer this link https://stackoverflow.com/a/40133225/3636561
String socailLink="https://www.facebook.com/kfc";
Intent intent = new Intent(Intent.ACTION_VIEW);
String facebookUrl = Utils.getFacebookUrl(getActivity(), socailLink);
if (facebookUrl == null || facebookUrl.length() == 0) {
Log.d("facebook Url", " is coming as " + facebookUrl);
return;
}
intent.setData(Uri.parse(facebookUrl));
startActivity(intent);
please refer link to get rest part.
Here's the calling order:
app.config()
app.run()
app.controller()
Here's a simple demo where you can watch each one executing (and experiment if you'd like).
From Angular's module docs:
Run blocks - get executed after the injector is created and are used to kickstart the application. Only instances and constants can be injected into run blocks. This is to prevent further system configuration during application run time.
Run blocks are the closest thing in Angular to the main method. A run block is the code which needs to run to kickstart the application. It is executed after all of the services have been configured and the injector has been created. Run blocks typically contain code which is hard to unit-test, and for this reason should be declared in isolated modules, so that they can be ignored in the unit-tests.
One situation where run blocks are used is during authentications.
I would suggest looking at how browsers handle forms by default. For example take a look at the form element <select multiple>
and how it handles multiple values from this example at w3schools.
<form action="/action_page.php">
<select name="cars" multiple>
<option value="volvo">Volvo</option>
<option value="saab">Saab</option>
<option value="opel">Opel</option>
<option value="audi">Audi</option>
</select>
<input type="submit">
</form>
For PHP use:
<select name="cars[]" multiple>
Live example from above at w3schools.com
From above if you click "saab, opel" and click submit, it will generate a result of cars=saab&cars=opel. Then depending on the back-end server, the parameter cars should come across as an array that you can further process.
Hope this helps anyone looking for a more 'standard' way of handling this issue.
Something like this:
var option = document.createElement("option");
option.text = "Text";
option.value = "myvalue";
var select = document.getElementById("id-to-my-select-box");
select.appendChild(option);
It looks like you are trying to use (almost) straight up C code here. Go has a few differences.
const
. The term const
has a different meaning in Go, as it does in C. The list should be defined as var
instead.basenameOpts
as opposed to basename_opts
.char
type in Go. You probably want byte
(or rune
if you intend to allow unicode codepoints).var x = foo
.For example:
type opt struct {
shortnm byte
longnm, help string
needArg bool
}
var basenameOpts = []opt {
opt {
shortnm: 'a',
longnm: "multiple",
needArg: false,
help: "Usage for a",
},
opt {
shortnm: 'b',
longnm: "b-option",
needArg: false,
help: "Usage for b",
},
}
An alternative is to declare the list with its type and then use an init
function to fill it up. This is mostly useful if you intend to use values returned by functions in the data structure. init
functions are run when the program is being initialized and are guaranteed to finish before main
is executed. You can have multiple init
functions in a package, or even in the same source file.
type opt struct {
shortnm byte
longnm, help string
needArg bool
}
var basenameOpts []opt
func init() {
basenameOpts = []opt{
opt {
shortnm: 'a',
longnm: "multiple",
needArg: false,
help: "Usage for a",
},
opt {
shortnm: 'b',
longnm: "b-option",
needArg: false,
help: "Usage for b",
},
}
}
Since you are new to Go, I strongly recommend reading through the language specification. It is pretty short and very clearly written. It will clear a lot of these little idiosyncrasies up for you.
Based on answers here and here:
const dashRE = /-/g;
const lodashRE = /_/g;
module.exports = function jwtDecode(tokenStr) {
const base64Url = tokenStr.split('.')[1];
if (base64Url === undefined) return null;
const base64 = base64Url.replace(dashRE, '+').replace(lodashRE, '/');
const jsonStr = Buffer.from(base64, 'base64').toString();
return JSON.parse(jsonStr);
};
did you try something like
for o : AnyObject in self.subviews {
if let v = o as? NSView {
v.removeFromSuperview()
}
}
You can do it with ViewModels like how you passed data from your controller to view.
Assume you have a viewmodel like this
public class ReportViewModel
{
public string Name { set;get;}
}
and in your GET Action,
public ActionResult Report()
{
return View(new ReportViewModel());
}
and your view must be strongly typed to ReportViewModel
@model ReportViewModel
@using(Html.BeginForm())
{
Report NAme : @Html.TextBoxFor(s=>s.Name)
<input type="submit" value="Generate report" />
}
and in your HttpPost action method in your controller
[HttpPost]
public ActionResult Report(ReportViewModel model)
{
//check for model.Name property value now
//to do : Return something
}
OR Simply, you can do this without the POCO classes (Viewmodels)
@using(Html.BeginForm())
{
<input type="text" name="reportName" />
<input type="submit" />
}
and in your HttpPost action, use a parameter with same name as the textbox name.
[HttpPost]
public ActionResult Report(string reportName)
{
//check for reportName parameter value now
//to do : Return something
}
EDIT : As per the comment
If you want to post to another controller, you may use this overload of the BeginForm method.
@using(Html.BeginForm("Report","SomeOtherControllerName"))
{
<input type="text" name="reportName" />
<input type="submit" />
}
You can use the same view model, simply set the property values in your GET action method
public ActionResult Report()
{
var vm = new ReportViewModel();
vm.Name="SuperManReport";
return View(vm);
}
and in your view
@model ReportViewModel
<h2>@Model.Name</h2>
<p>Can have input field with value set in action method</p>
@using(Html.BeginForm())
{
@Html.TextBoxFor(s=>s.Name)
<input type="submit" />
}
Eclipse has an error log. There you will see the complete stack trace. In my case it seems to be caused by a bad jar file combined with the java.util.zip libs not throwing a proper exception, just a NullPointerException.
OK, I am a Ruby noob, but I did get this fixed slightly differently than the answers here, so hopefully this helps someone else (tl;dr: I used RVM to switch the system Ruby version to the same one expected by rubygems).
First off, listing all Rubies as mentioned by Eimantas was a great starting point:
> which -a ruby
/opt/local/bin/ruby
/Users/Brian/.rvm/rubies/ruby-1.9.2-p290/bin/ruby
/Users/Brian/.rvm/bin/ruby
/usr/bin/ruby
/opt/local/bin/ruby
The default Ruby instance in use by the system appeared to be 1.8.7:
> ruby -v
ruby 1.8.7 (2010-06-23 patchlevel 299) [i686-darwin10]
while the version in use by Rubygems was the 1.9.2 version managed by RVM:
> gem env | grep 'RUBY EXECUTABLE'
- RUBY EXECUTABLE: /Users/Brian/.rvm/rubies/ruby-1.9.2-p290/bin/ruby
So that was definitely the issue. I don't actively use Ruby myself (this is simply a dependency of a build system script I'm trying to run) so I didn't care which version was active for other purposes. Since rubygems expected the 1.9.2 that was already managed by RVM, I simply used RVM to switch the system to use the 1.9.2 version as the default:
> rvm use 1.9.2
Using /Users/Brian/.rvm/gems/ruby-1.9.2-p290
> ruby -v
ruby 1.9.2p290 (2011-07-09 revision 32553) [x86_64-darwin11.3.0]
After doing that my "no such file" issue went away and my script started working.
I thinks this is the best example for using randomUUID :
Both looks similar, but there are some key points:
save()
will trigger any overridden Model.save()
method, but update()
will not trigger this and make a direct update on the database level. So if you have some models with overridden save methods, you must either avoid using update or find another way to do whatever you are doing on that overridden save()
methods.
obj.save()
may have some side effects if you are not careful. You retrieve the object with get(...)
and all model field values are passed to your obj. When you call obj.save()
, django will save the current object state to record. So if some changes happens between get()
and save()
by some other process, then those changes will be lost. use save(update_fields=[.....])
for avoiding such problems.
Before Django version 1.5, Django was executing a SELECT
before INSERT
/UPDATE
, so it costs 2 query execution. With version 1.5, that method is deprecated.
In here, there is a good guide or save()
and update()
methods and how they are executed.
1.downlad nvm
2.install chocolaty
3.change C:\Program Files\node to C:\Program Files\nodejsx
emphasized textThe first thing that we need to do is install NVM. website : https://docs.microsoft.com/en-us/windows/nodejs/setup-on-windows
This is my work around:
1) Add a wrapper div to the recaptcha div.
<div id="recaptcha-wrapper"><div class="g-recaptcha" data-sitekey="..."></div></div>
2) Add javascript/jquery code.
$(function(){
// global variables
captchaResized = false;
captchaWidth = 304;
captchaHeight = 78;
captchaWrapper = $('#recaptcha-wrapper');
captchaElements = $('#rc-imageselect, .g-recaptcha');
resizeCaptcha();
$(window).on('resize', function() {
resizeCaptcha();
});
});
function resizeCaptcha() {
if (captchaWrapper.width() >= captchaWidth) {
if (captchaResized) {
captchaElements.css('transform', '').css('-webkit-transform', '').css('-ms-transform', '').css('-o-transform', '').css('transform-origin', '').css('-webkit-transform-origin', '').css('-ms-transform-origin', '').css('-o-transform-origin', '');
captchaWrapper.height(captchaHeight);
captchaResized = false;
}
} else {
var scale = (1 - (captchaWidth - captchaWrapper.width()) * (0.05/15));
captchaElements.css('transform', 'scale('+scale+')').css('-webkit-transform', 'scale('+scale+')').css('-ms-transform', 'scale('+scale+')').css('-o-transform', 'scale('+scale+')').css('transform-origin', '0 0').css('-webkit-transform-origin', '0 0').css('-ms-transform-origin', '0 0').css('-o-transform-origin', '0 0');
captchaWrapper.height(captchaHeight * scale);
if (captchaResized == false) captchaResized = true;
}
}
3) Optional: add some styling if needed.
#recaptcha-wrapper {
text-align:center;
margin-bottom:15px;
}
.g-recaptcha {
display:inline-block;
}
This is what I do on Android with Proguard:
public enum SomeStatus {
UNINITIALIZED, STATUS_1, RESERVED_1, STATUS_2, RESERVED_2, STATUS_3;//do not change order
private static SomeStatus[] values = null;
public static SomeStatus fromInteger(int i) {
if(SomeStatus.values == null) {
SomeStatus.values = SomeStatus.values();
}
if (i < 0) return SomeStatus.values[0];
if (i >= SomeStatus.values.length) return SomeStatus.values[0];
return SomeStatus.values[i];
}
}
it's short and I don't need to worry about having an exception in Proguard
Snapshot simply means depending on your configuration Maven will check latest changes on a special dependency. Snapshot is unstable because it is under development but if on a special project needs to has a latest changes you must configure your dependency version to snapshot version. This scenario occurs in big organizations with multiple products that these products related to each other very closely.
I am surprised that no-one else has mentioned this so I am sharing in case none of the above help (my case).
What was happening was that an VBCSCompiler.exe instance was somehow stuck and was in fact not releasing the file handles to allow new instances to correctly write the new files and was causing the issue. This became apparent when I tried to delete the "bin" folder and it was complaining that another process was using files in there.
Closed VS, opened task manager, looked and terminated all VBCSCompiler instances and deleted the "bin" folder to get back to where I was.
I either set it to "" or null - I always check by using String.IsNullOrEmpty, so either is fine.
But the inner geek in me says I should set it to null before I have a proper value for it...
As per the DOM structure you can use below code:
var x = document.getElementById('mySelect');
var txt = "";
var val = "";
for (var i = 0; i < x.length; i++) {
txt +=x[i].text + ",";
val +=x[i].value + ",";
}
$ sudo ln -s -f $(which python3) $(which python)
done.
This is if you are building a package and you are finding error in imports. I learnt it the hard way.The answer isn't to add the package to python path or to do it programatically (what if your module gets installed and your command adds it again?) thats a bad way.
The right thing to do is: 1) Use virtualenv pyvenv-3.4 or something similar 2) Activate the development mode - $python setup.py develop
The database must have a name (example DB1), try this one:
OracleConnection con = new OracleConnection("data source=DB1;user id=fastecit;password=fastecit");
In case the TNS is not defined you can also try this one:
OracleConnection con = new OracleConnection("Data Source=(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)(HOST=localhost)(PORT=1521)))(CONNECT_DATA=(SERVER=DEDICATED)(SERVICE_NAME=DB1)));
User Id=fastecit;Password=fastecit");
1) Change your .net profile from Client profile to to .Net Framework 4.0 http://msdn.microsoft.com/en-us/library/bb398202.aspx
2) Check your Embed Interop Types flag
This one would delete empty hashes too:
swoop = Proc.new { |k, v| v.delete_if(&swoop) if v.kind_of?(Hash); v.empty? }
hsh.delete_if &swoop
./eclipse -clean -refresh
as mentioned in comment by sulai Dec 20 '12 at 12:46, that worked for me.
However, on the Mac OS X, I had to figure out how to get to ./eclipse
Here's the solution:
cd Eclipse.app/Contents/MacOS/
Thank you Andrew's comment for this post: https://stackoverflow.com/a/1783448/2162226
A version of crossdomain.xml used to be packaged with the HTML5 Boilerplate which is the product of many years of iterative development and combined community knowledge. However, it has since been deleted from the repository. I've copied it verbatim here, and included a link to the commit where it was deleted below.
<?xml version="1.0"?>
<!DOCTYPE cross-domain-policy SYSTEM "http://www.adobe.com/xml/dtds/cross-domain-policy.dtd">
<cross-domain-policy>
<!-- Read this: https://www.adobe.com/devnet/articles/crossdomain_policy_file_spec.html -->
<!-- Most restrictive policy: -->
<site-control permitted-cross-domain-policies="none"/>
<!-- Least restrictive policy: -->
<!--
<site-control permitted-cross-domain-policies="all"/>
<allow-access-from domain="*" to-ports="*" secure="false"/>
<allow-http-request-headers-from domain="*" headers="*" secure="false"/>
-->
</cross-domain-policy>
Deleted in #1881
https://github.com/h5bp/html5-boilerplate/commit/58a2ba81d250301e7b5e3da28ae4c1b42d91b2c2
Another way to continue with the example @nfreeze used is this validation method:
UserModel.schema.path('name').validate(function (value, res) {
UserModel.findOne({name: value}, 'id', function(err, user) {
if (err) return res(err);
if (user) return res(false);
res(true);
});
}, 'already exists');
The simple way is:
function Foo(a) {
var that=this;
function privateMethod() { .. }
// public methods
that.add = function(b) {
return a + b;
};
that.avg = function(b) {
return that.add(b) / 2; // calling another public method
};
}
var x = new Foo(10);
alert(x.add(2)); // 12
alert(x.avg(20)); // 15
The reason for that
is that this
can be bound to something else if you give a method as an event handler, so you save the value during instantiation and use it later.
Edit: it's definitely not the best way, just a simple way. I'm waiting for good answers too!
.help will show you all the options. Do .exit in this case
cmd.exe
as system
We can get kernel access through CMD
in Windows XP/Vista/7/8.1 easily by attaching a debugger:
REG ADD "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\osk.exe" /v Debugger /t REG_SZ /d "C:\windows\system32\cmd.exe"
Run CMD
as Administrator
Then use this command in Elevated:
CMD REG ADD "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\osk.exe" /v Debugger /t REG_SZ /d "C:\windows\system32\cmd.exe"
Then run osk
(onscreenkeyboard). It still does not run with system Integrity level if you check through process explorer, but if you can use OSK in service session, it will run as NT Authority\SYSTEM
so I had the idea you have to run it on Secure Desktop.
Start any file as Administrator. When UAC prompts appear, just press Win+U and start OSK
and it will start CMD
instead. Then in the elevated prompt, type whoami
and you will get NT Authority\System
. After that, you can start Explorer from the system command shell and use the System profile, but you are somewhat limited what you can do on the network through SYSTEM privileges for security reasons. I will add more explanation later as I discovered it a year ago.
Running Cmd.exe
Under Local System Account Without Using PsExec
. This method runs Debugger Trap technique that was discovered earlier, well this technique has its own benefits it can be used to trap some crafty/malicious worm or malware in the debugger and run some other exe instead to stop the spread or damage temporary. here this registry key traps onscreen keyboard in windows native debugger and runs cmd.exe instead but cmd will still run with Logged on users privileges, however if we run cmd in session0 we can get system shell. so we add here another idea we span the cmd on secure desktop remember secure desktop runs in session 0 under system account and we get system shell. So whenever you run anything as elevated, you have to answer the UAC prompt and UAC prompts on dark, non interactive desktop and once you see it you have to press Win+U and then select OSK
you will get CMD.exe
running under Local system privileges. There are even more ways to get local system access with CMD
Just an update:
You should use ::ng-deep
instead of /deep/
which seems to be deprecated.
Per documentation:
The shadow-piercing descendant combinator is deprecated and support is being removed from major browsers and tools. As such we plan to drop support in Angular (for all 3 of /deep/, >>> and ::ng-deep). Until then ::ng-deep should be preferred for a broader compatibility with the tools.
You can find it here
The Timer function also applies to Access 2007, Access 2010, Access 2013, Access 2016, Access 2007 Developer, Access 2010 Developer, Access 2013 Developer. Insert this code to to pause time for certain amount of seconds
T0 = Timer
Do
Delay = Timer - T0
Loop Until Delay = 1 'Change this value to pause time in second
For the record, here is the class I ended up writing:
import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;
public final class XssFilter implements Filter {
static class FilteredRequest extends HttpServletRequestWrapper {
/* These are the characters allowed by the Javascript validation */
static String allowedChars = "+-0123456789#*";
public FilteredRequest(ServletRequest request) {
super((HttpServletRequest)request);
}
public String sanitize(String input) {
String result = "";
for (int i = 0; i < input.length(); i++) {
if (allowedChars.indexOf(input.charAt(i)) >= 0) {
result += input.charAt(i);
}
}
return result;
}
public String getParameter(String paramName) {
String value = super.getParameter(paramName);
if ("dangerousParamName".equals(paramName)) {
value = sanitize(value);
}
return value;
}
public String[] getParameterValues(String paramName) {
String values[] = super.getParameterValues(paramName);
if ("dangerousParamName".equals(paramName)) {
for (int index = 0; index < values.length; index++) {
values[index] = sanitize(values[index]);
}
}
return values;
}
}
public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain) throws IOException, ServletException {
chain.doFilter(new FilteredRequest(request), response);
}
public void destroy() {
}
public void init(FilterConfig filterConfig) {
}
}
To avoid x !instance of Long
prob
Add
<property name="openjpa.Compatibility" value="StrictIdentityValues=false"/>
in your persistence.xml
I have created this little bit of code, which can return true types.
I am not sure about performance yet, but it's an attempt to properly identify the typeof.
https://github.com/valtido/better-typeOf also blogged a little about it here http://www.jqui.net/jquery/better-typeof-than-the-javascript-native-typeof/
it works, similar to the current typeof.
var user = [1,2,3]
typeOf(user); //[object Array]
It think it may need a bit of fine tuning, and take into account things, I have not come across or test it properly. so further improvements are welcomed, whether it's performance wise, or incorrectly re-porting of typeOf.
If Color
is something that is specific to just Car
s then that is the way you would limit its scope. If you are going to have another Color
enum that other classes use then you might as well make it global (or at least outside Car
).
It makes no difference. If there is a global one then the local one is still used anyway as it is closer to the current scope. Note that if you define those function outside of the class definition then you'll need to explicitly specify Car::Color
in the function's interface.
You may look into something kind of Unique List as follows
public class UniqueList<T>
{
public List<T> List
{
get;
private set;
}
List<T> _internalList;
public static UniqueList<T> NewList
{
get
{
return new UniqueList<T>();
}
}
private UniqueList()
{
_internalList = new List<T>();
List = new List<T>();
}
public void Add(T value)
{
List.Clear();
_internalList.Add(value);
List.AddRange(_internalList.Distinct());
//return List;
}
public void Add(params T[] values)
{
List.Clear();
_internalList.AddRange(values);
List.AddRange(_internalList.Distinct());
// return List;
}
public bool Has(T value)
{
return List.Contains(value);
}
}
and you can use it like follows
var uniquelist = UniqueList<string>.NewList;
uniquelist.Add("abc","def","ghi","jkl","mno");
uniquelist.Add("abc","jkl");
var _myList = uniquelist.List;
will only return "abc","def","ghi","jkl","mno"
always even when duplicates are added to it
Adrian's answer threw "fatal: This operation must be run in a work tree." The following is what worked for us.
git worktree add <new-dir> --no-checkout --detach
cd <new-dir>
git checkout <some-ref> -- <existing-dir>
Notes:
--no-checkout
Do not checkout anything into the new worktree.--detach
Do not create a new branch for the new worktree.<some-ref>
works with any ref, for instance, it works with HEAD~1
.git worktree prune
. If you declared different variables then use following simple method:
Int salary=2000;
String abc="I Love Pakistan";
Double pi=3.14;
Console.Writeline=salary+"/n"+abc+"/n"+pi;
Console.readkey();
This solution worked for me
// store the currently selected tab in the hash value
if(history.pushState) {
window.history.pushState(null, null, '#' + id);
}
else {
window.location.hash = id;
}
// on load of the page: switch to the currently selected tab
var hash = window.location.hash;
$('#myTab a[href="' + hash + '"]').tab('show');
And my full js code is
$('#myTab a').click(function(e) {
e.preventDefault();
$(this).tab('show');
});
// store the currently selected tab in the hash value
$("ul.nav-tabs > li > a").on("shown.bs.tab", function(e) {
var id = $(e.target).attr("href").substr(1);
if(history.pushState) {
window.history.pushState(null, null, '#' + id);
}
else {
window.location.hash = id;
}
// window.location.hash = '#!' + id;
});
// on load of the page: switch to the currently selected tab
var hash = window.location.hash;
// console.log(hash);
$('#myTab a[href="' + hash + '"]').tab('show');
Atom currently does not have a built-in terminal(that I know of), so you would have to install an additional package such as platformio-ide-terminal
.
The following screenshots were taken on a mac.
+
to Install a new packageIf you need to show shorter link (only domain), but with same long URL, you can try my modification of Sam Hasler's code version posted above
function replaceURLWithHTMLLinks(text) {
var exp = /(\b(https?|ftp|file):\/\/([-A-Z0-9+&@#%?=~_|!:,.;]*)([-A-Z0-9+&@#%?\/=~_|!:,.;]*)[-A-Z0-9+&@#\/%=~_|])/ig;
return text.replace(exp, "<a href='$1' target='_blank'>$3</a>");
}
I solved this problem with a directive that basicly what it does is to bind the real ng-model on a special attribute which I watch in the directive, then using a debounce service I update my directive attribute, so the user watch on the variable that he bind to debounce-model instead of ng-model.
.directive('debounceDelay', function ($compile, $debounce) {
return {
replace: false,
scope: {
debounceModel: '='
},
link: function (scope, element, attr) {
var delay= attr.debounceDelay;
var applyFunc = function () {
scope.debounceModel = scope.model;
}
scope.model = scope.debounceModel;
scope.$watch('model', function(){
$debounce(applyFunc, delay);
});
attr.$set('ngModel', 'model');
element.removeAttr('debounce-delay'); // so the next $compile won't run it again!
$compile(element)(scope);
}
};
});
Usage:
<input type="text" debounce-delay="1000" debounce-model="search"></input>
And in the controller :
$scope.search = "";
$scope.$watch('search', function (newVal, oldVal) {
if(newVal === oldVal){
return;
}else{ //do something meaningful }
Demo in jsfiddle: http://jsfiddle.net/6K7Kd/37/
the $debounce service can be found here: http://jsfiddle.net/Warspawn/6K7Kd/
Inspired by eventuallyBind directive http://jsfiddle.net/fctZH/12/
For those working on fragments and it disappeared after setting toolbar.getBackground().setAlpha(0);
or any disappearance, i think you have to bring your AppBarLayout to the last in the xml, so its Fragment then AppBarLayout then relativelayout/constraint/linear whichever u use.
It depends on which version of Oracle? Older versions require exp (export), newer versions use expdp (data pump); exp was deprecated but still works most of the time.
Before starting, note that Data Pump exports to the server-side Oracle "directory", which is an Oracle symbolic location mapped in the database to a physical location. There may be a default directory (DATA_PUMP_DIR), check by querying DBA_DIRECTORIES:
SQL> select * from dba_directories;
... and if not, create one
SQL> create directory DATA_PUMP_DIR as '/oracle/dumps';
SQL> grant all on directory DATA_PUMP_DIR to myuser; -- DBAs dont need this grant
Assuming you can connect as the SYSTEM user, or another DBA, you can export any schema like so, to the default directory:
$ expdp system/manager schemas=user1 dumpfile=user1.dpdmp
Or specifying a specific directory, add directory=<directory name>
:
C:\> expdp system/manager schemas=user1 dumpfile=user1.dpdmp directory=DUMPDIR
With older export utility, you can export to your working directory, and even on a client machine that is remote from the server, using:
$ exp system/manager owner=user1 file=user1.dmp
Make sure the export is done in the correct charset. If you haven't setup your environment, the Oracle client charset may not match the DB charset, and Oracle will do charset conversion, which may not be what you want. You'll see a warning, if so, then you'll want to repeat the export after setting NLS_LANG environment variable so the client charset matches the database charset. This will cause Oracle to skip charset conversion.
Example for American UTF8 (UNIX):
$ export NLS_LANG=AMERICAN_AMERICA.AL32UTF8
Windows uses SET, example using Japanese UTF8:
C:\> set NLS_LANG=Japanese_Japan.AL32UTF8
More info on Data Pump here: http://docs.oracle.com/cd/B28359_01/server.111/b28319/dp_export.htm#g1022624
this
in JavaScript always refers to the 'owner' of the function that is being executed.
If no explicit owner is defined, then the top most owner, the window object, is referenced.
So if I did
function someKindOfFunction() {
this.style = 'foo';
}
element.onclick = someKindOfFunction;
this
would refer to the element object. But be careful, a lot of people make this mistake.
<element onclick="someKindOfFunction()">
In the latter case, you merely reference the function, not hand it over to the element. Therefore, this
will refer to the window object.
for (int i = 0; i < clbIncludes.Items.Count; i++)
if (clbIncludes.GetItemChecked(i))
// Do selected stuff
else
// Do unselected stuff
If the the check is in indeterminate state, this will still return true. You may want to replace
if (clbIncludes.GetItemChecked(i))
with
if (clbIncludes.GetItemCheckState(i) == CheckState.Checked)
if you want to only include actually checked items.
CardView
extends FrameLayout, so it support foreground
attribute. Using foreground
attribute can also add border easily.
layout as follows:
<androidx.cardview.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/link_card"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:foreground="@drawable/bg_roundrect_ripple_light_border"
app:cardCornerRadius="23dp"
app:cardElevation="0dp">
</androidx.cardview.widget.CardView>
bg_roundrect_ripple_light_border.xml
<?xml version="1.0" encoding="utf-8"?>
<ripple xmlns:android="http://schemas.android.com/apk/res/android"
android:color="@color/ripple_color_light">
<item>
<shape android:shape="rectangle">
<stroke
android:width="0.5dp"
android:color="#DDDDDD" />
<corners android:radius="23dp" />
</shape>
</item>
<item android:id="@android:id/mask">
<shape android:shape="rectangle">
<corners android:radius="23dp" />
<solid android:color="@color/background" />
</shape>
</item>
</ripple>
Here's an httplib
solution that behaves like urllib2. You can just give it a URL and it just works. No need to mess about splitting up your URLs into hostname and path. This function already does that.
import httplib
import socket
def get_link_status(url):
"""
Gets the HTTP status of the url or returns an error associated with it. Always returns a string.
"""
https=False
url=re.sub(r'(.*)#.*$',r'\1',url)
url=url.split('/',3)
if len(url) > 3:
path='/'+url[3]
else:
path='/'
if url[0] == 'http:':
port=80
elif url[0] == 'https:':
port=443
https=True
if ':' in url[2]:
host=url[2].split(':')[0]
port=url[2].split(':')[1]
else:
host=url[2]
try:
headers={'User-Agent':'Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:26.0) Gecko/20100101 Firefox/26.0',
'Host':host
}
if https:
conn=httplib.HTTPSConnection(host=host,port=port,timeout=10)
else:
conn=httplib.HTTPConnection(host=host,port=port,timeout=10)
conn.request(method="HEAD",url=path,headers=headers)
response=str(conn.getresponse().status)
conn.close()
except socket.gaierror,e:
response="Socket Error (%d): %s" % (e[0],e[1])
except StandardError,e:
if hasattr(e,'getcode') and len(e.getcode()) > 0:
response=str(e.getcode())
if hasattr(e, 'message') and len(e.message) > 0:
response=str(e.message)
elif hasattr(e, 'msg') and len(e.msg) > 0:
response=str(e.msg)
elif type('') == type(e):
response=e
else:
response="Exception occurred without a good error message. Manually check the URL to see the status. If it is believed this URL is 100% good then file a issue for a potential bug."
return response
Use the new assertThat
syntax together with Hamcrest.
It is available starting with JUnit 4.4.
You can accomplish this in a very back-handed way with the following code:
exports.getStaticCompanies = function () {
var ids = [46128, 2865, 49569, 1488, 45600, 61991, 1418, 61919, 53326, 61680]
return Company.findAll({
where: {
id: ids
},
attributes: ['id', 'logo_version', 'logo_content_type', 'name', 'updated_at'],
order: sequelize.literal('(' + ids.map(function(id) {
return '"Company"."id" = \'' + id + '\'');
}).join(', ') + ') DESC')
});
};
This is somewhat limited because it's got very bad performance characteristics past a few dozen records, but it's acceptable at the scale you're using.
This will produce a SQL query that looks something like this:
[...] ORDER BY ("Company"."id"='46128', "Company"."id"='2865', "Company"."id"='49569', [...])
For CentOS based server use
yum install php-pecl-zip.x86_64
Enable it by running: echo "extension=zip.so" >> /etc/php.d/zip.ini
Immutable Object's state cannot be altered.
for example String
.
String str= "abc";//a object of string is created
str = str + "def";// a new object of string is created and assigned to str
First, start the code block with <%# instead of <%= :
<head id="head1" runat="server">
<title>My Page</title>
<link href="css/common.css" rel="stylesheet" type="text/css" />
<script type="text/javascript" src="<%# ResolveUrl("~/javascript/leesUtils.js") %>"></script>
</head>
This changes the code block from a Response.Write code block to a databinding expression.
Since <%# ... %>
databinding expressions aren't code blocks, the CLR won't complain. Then in the code for the master page, you'd add the following:
protected void Page_Load(object sender, EventArgs e)
{
Page.Header.DataBind();
}
list = new List<ProcedureTime>(); sortedList = list.OrderByDescending(ProcedureTime=> ProcedureTime.EndTime).ToList();
Which works for me to show the time sorted in descending order.
That is, you are referencing an image, but instead of providing an external url, the png image data is in the url itself, embedded in the style sheet. data:image/png;base64 tells the browser that the data is inline, is a png image and is in this case base64 encoded. The encoding is needed because png images can contain bytes that are invalid inside a HTML document (or within the HTTP protocol even).
The backgroundTint
attribute will help you to add a tint(shade) to the background. You can provide a color value for the same in the form of - "#rgb", "#argb", "#rrggbb", or "#aarrggbb".
The backgroundTintMode
on the other hand will help you to apply the background tint. It must have constant values like src_over, src_in, src_atop,
etc.
Refer this to get a clear idea of the the constant values that can be used. Search for the backgroundTint
attribute and the description along with various attributes will be available.
I had a case where AV was quarantining Psexec - had to disable On-access scanning
if it is window7(like mine), without administrative rights cannot write a file at C: drive
just give another folder in log4j.properties file
Set the name of the file
log4j.appender.FILE.File=C:\server\log.out you can see with notepad++
Benefits of axios:
An alternative adaptation of Jebs Solution that avoids the use of call via the use of Macro arguments and variable substitution:
@Echo off
:# Macro Definitions
For /F "tokens=1,2 delims=#" %%a in ('"prompt #$H#$E# & echo on & for %%b in (1) do rem"') do (set "DEL=%%a")
:# %\C% - Color macro; No error checking. Usage:
:# %\C:?=HEXVALUE%Output String
:# (%\C:?=HEXVALUE%Output String) & (%\C:?=HEXVALUE%Output String)
Set "\C=For %%o in (1 2)Do if %%o==2 (( <nul set /p ".=%DEL%" > "^^!os:\n=^^!" ) & ( findstr /v /a:? /R "^$" "^^!os:\n=^^!" nul ) & ( del "^^!os:\n=^^!" > nul 2>&1 ) & (Set "testos=^^!os:\n=^^!" & If not "^^!testos^^!" == "^^!os^^!" (Echo/)))Else Set os="
:# Ensure macro escaping is correct depending on delayedexpansion environment type
If Not "!![" == "[" (
Set "\C=%\C:^^=^%"
)
Setlocal EnableExtensions EnableDelayedExpansion
PUSHD "%~dp0"
:# SCRIPT MAIN BODY
:# To force a new line; terminate an output string with: \n
:# Usage info:
(%\C:?=40% This is an example of usage\n)&(%\C:?=50% Trailing whitespace and periods are removed.\n)
(%\C:?=0e% Leading spaces and periods are retained)&(%\C:?=e0%. NOT SUPPORTED - \n)
%\C:?=02% Colon ^& Unescaped Ampersands ^& doublequotes\n
%\C:?=02% LSS than ^& GTR than symbols ^& foreward and backward slashes\n
(%\C:?=02% Pipe ^& Question Mark and Asterisk characters.\n) & (%\C:?=e2%^^! Exclaimation ^^! marks must be escaped\n)
:end
POPD
Endlocal
Goto :Eof
You just add one additional row before you execute the loop. This row contains your CSV file header name.
schema = ['a','b','c','b']
row = 4
generators = ['A','B','C','D']
with open('test.csv','wb') as csvfile:
writer = csv.writer(csvfile, delimiter=delimiter)
# Gives the header name row into csv
writer.writerow([g for g in schema])
#Data add in csv file
for x in xrange(rows):
writer.writerow([g() for g in generators])
If you are that particular to pass elements to viewmodel You can use
CommandParameter="{Binding ElementName=ManualParcelScanScreen}"
<script type="text/javascript">
var frm = $('#myform');
frm.submit(function (ev) {
$.ajax({
type: frm.attr('method'),
url: frm.attr('action'),
data: frm.serialize(),
success: function (data) {
alert('ok');
}
});
ev.preventDefault();
});
</script>
<form id="myform" action="/your_url" method="post">
...
</form>
You could use a negative look-ahead assertion:
^(?!tbd_).+
Or a negative look-behind assertion:
(^.{1,3}$|^.{4}(?<!tbd_).*)
Or just plain old character sets and alternations:
^([^t]|t($|[^b]|b($|[^d]|d($|[^_])))).*
To answer the original question directly. savedInstancestate is null because your Activity is never being re-created.
Your Activity will only be re-created with a state bundle when:
Android will destroy background activities when under memory pressure or after they've been in the background for an extended period of time.
When testing your hello world example there are a few ways to leave and return to the Activity.
In most cases if you're just pressing home and then launching the app again the activity won't need to be re-created. It already exists in memory so onCreate() won't be called.
There is an option under Settings -> Developer Options called "Don't keep activities". When it's enabled Android will always destroy activities and recreate them when they're backgrounded. This is a great option to leave enabled when developing because it simulates the worst case scenario. ( A low memory device recycling your activities all the time ).
The other answers are valuable in that they teach you the correct ways to store state but I didn't feel they really answered WHY your code wasn't working in the way you expected.
Before stumbling onto this post, I came up with this solution - to toggle the TopMost property:
this.TopMost = true;
this.TopMost = false;
I have this code in my form's constructor, eg:
public MyForm()
{
//...
// Brint-to-front hack
this.TopMost = true;
this.TopMost = false;
//...
}
You can start reading from here jQuery.ajax()
Actually Controller Action is a public method which can be accessed through Url. So any call of an Action from an Ajax call, either MicrosoftMvcAjax or jQuery can be made. For me, jQuery is the simplest one. It got a lots of examples in the link I gave above. The typical example for an ajax call is like this.
$.ajax({
// edit to add steve's suggestion.
//url: "/ControllerName/ActionName",
url: '<%= Url.Action("ActionName", "ControllerName") %>',
success: function(data) {
// your data could be a View or Json or what ever you returned in your action method
// parse your data here
alert(data);
}
});
More examples can be found in here
this
refers to a reference of the current class.
super
refers to the parent of the current class (which called the super
keyword).
By doing this
, it allows you to access methods/attributes of the current class (including its own private methods/attributes).
super
allows you to access public/protected method/attributes of parent(base) class. You cannot see the parent's private method/attributes.
pgcrypto
ExtensionAs of Postgres 9.4, the pgcrypto
module includes the gen_random_uuid()
function. This function generates one of the random-number based Version 4 type of UUID.
Get contrib modules, if not already available.
sudo apt-get install postgresql-contrib-9.4
Use pgcrypto
module.
CREATE EXTENSION "pgcrypto";
The gen_random_uuid()
function should now available;
Example usage.
INSERT INTO items VALUES( gen_random_uuid(), 54.321, 31, 'desc 1', 31.94 ) ;
Quote from Postgres doc on uuid-ossp
module.
Note: If you only need randomly-generated (version 4) UUIDs, consider using the gen_random_uuid() function from the pgcrypto module instead.
try this which is working for me in my test demo
<script>
$(document).ready(function(){
$('#dropdown').change(function()
{
// var selectedValue = parseInt(jQuery(this).val());
var text = $('#dropdown').val();
//alert("text");
//Depend on Value i.e. 0 or 1 respective function gets called.
switch(text){
case 'Reporting':
// alert("hello1");
$("#td1").hide();
break;
case 'Buyer':
//alert("hello");
$("#td1").show();
break;
//etc...
default:
alert("catch default");
break;
}
});
});
</script>
pkill -9 python
should kill any running python process.
I cribbed this and added the 'px'; Works very well.
function getOffset(el) {
el = el.getBoundingClientRect();
return {
left: (el.right + window.scrollX ) +'px',
top: (el.top + window.scrollY ) +'px'
}
}
to call: //Gets it to the right side
el.style.top = getOffset(othis).top ;
el.style.left = getOffset(othis).left ;
"workbench.panel.defaultLocation": "right",
A Session object is basically an ongoing transaction of changes to a database (update, insert, delete). These operations aren't persisted to the database until they are committed (if your program aborts for some reason in mid-session transaction, any uncommitted changes within are lost).
The session object registers transaction operations with session.add()
, but doesn't yet communicate them to the database until session.flush()
is called.
session.flush()
communicates a series of operations to the database (insert, update, delete). The database maintains them as pending operations in a transaction. The changes aren't persisted permanently to disk, or visible to other transactions until the database receives a COMMIT for the current transaction (which is what session.commit()
does).
session.commit()
commits (persists) those changes to the database.
flush()
is always called as part of a call to commit()
(1).
When you use a Session object to query the database, the query will return results both from the database and from the flushed parts of the uncommitted transaction it holds. By default, Session objects autoflush
their operations, but this can be disabled.
Hopefully this example will make this clearer:
#---
s = Session()
s.add(Foo('A')) # The Foo('A') object has been added to the session.
# It has not been committed to the database yet,
# but is returned as part of a query.
print 1, s.query(Foo).all()
s.commit()
#---
s2 = Session()
s2.autoflush = False
s2.add(Foo('B'))
print 2, s2.query(Foo).all() # The Foo('B') object is *not* returned
# as part of this query because it hasn't
# been flushed yet.
s2.flush() # Now, Foo('B') is in the same state as
# Foo('A') was above.
print 3, s2.query(Foo).all()
s2.rollback() # Foo('B') has not been committed, and rolling
# back the session's transaction removes it
# from the session.
print 4, s2.query(Foo).all()
#---
Output:
1 [<Foo('A')>]
2 [<Foo('A')>]
3 [<Foo('A')>, <Foo('B')>]
4 [<Foo('A')>]
I think you are asking about code like this.
int count = (request.getParameter("counter") == null) ? 0 : Integer.parseInt(request.getParameter("counter"));
Give the container class
.container{
height: 100vh;
width: 100vw;
display: flex;
}
Give the div that's inside the container:
align-content: center;
All the content inside this div will show up in the middle of the page.
Update 2nd table data in 1st table need to Inner join before SET :
`UPDATE `table1` INNER JOIN `table2` ON `table2`.`id`=`table1`.`id` SET `table1`.`name`=`table2`.`name`, `table1`.`template`=`table2`.`template`;
http://en.wikibooks.org/wiki/LaTeX/Formatting
use \alltt
environment instead. Then set size using the same commands as outside verbatim environment.
CSS Keyframes support is pretty good these days:
.fade-in {_x000D_
opacity: 1;_x000D_
animation-name: fadeInOpacity;_x000D_
animation-iteration-count: 1;_x000D_
animation-timing-function: ease-in;_x000D_
animation-duration: 2s;_x000D_
}_x000D_
_x000D_
@keyframes fadeInOpacity {_x000D_
0% {_x000D_
opacity: 0;_x000D_
}_x000D_
100% {_x000D_
opacity: 1;_x000D_
}_x000D_
}
_x000D_
<h1 class="fade-in">Fade Me Down Scotty</h1>
_x000D_
Time to go back in time for a lesson. While we don't think about these things much in our fancy managed languages today, they are built on the same foundation, so let's look at how memory is managed in C.
Before I dive in, a quick explanation of what the term "pointer" means. A pointer is simply a variable that "points" to a location in memory. It doesn't contain the actual value at this area of memory, it contains the memory address to it. Think of a block of memory as a mailbox. The pointer would be the address to that mailbox.
In C, an array is simply a pointer with an offset, the offset specifies how far in memory to look. This provides O(1) access time.
MyArray [5]
^ ^
Pointer Offset
All other data structures either build upon this, or do not use adjacent memory for storage, resulting in poor random access look up time (Though there are other benefits to not using sequential memory).
For example, let's say we have an array with 6 numbers (6,4,2,3,1,5) in it, in memory it would look like this:
=====================================
| 6 | 4 | 2 | 3 | 1 | 5 |
=====================================
In an array, we know that each element is next to each other in memory. A C array (Called MyArray
here) is simply a pointer to the first element:
=====================================
| 6 | 4 | 2 | 3 | 1 | 5 |
=====================================
^
MyArray
If we wanted to look up MyArray[4]
, internally it would be accessed like this:
0 1 2 3 4
=====================================
| 6 | 4 | 2 | 3 | 1 | 5 |
=====================================
^
MyArray + 4 ---------------/
(Pointer + Offset)
Because we can directly access any element in the array by adding the offset to the pointer, we can look up any element in the same amount of time, regardless of the size of the array. This means that getting MyArray[1000]
would take the same amount of time as getting MyArray[5]
.
An alternative data structure is a linked list. This is a linear list of pointers, each pointing to the next node
======== ======== ======== ======== ========
| Data | | Data | | Data | | Data | | Data |
| | -> | | -> | | -> | | -> | |
| P1 | | P2 | | P3 | | P4 | | P5 |
======== ======== ======== ======== ========
P(X) stands for Pointer to next node.
Note that I made each "node" into its own block. This is because they are not guaranteed to be (and most likely won't be) adjacent in memory.
If I want to access P3, I can't directly access it, because I don't know where it is in memory. All I know is where the root (P1) is, so instead I have to start at P1, and follow each pointer to the desired node.
This is a O(N) look up time (The look up cost increases as each element is added). It is much more expensive to get to P1000 compared to getting to P4.
Higher level data structures, such as hashtables, stacks and queues, all may use an array (or multiple arrays) internally, while Linked Lists and Binary Trees usually use nodes and pointers.
You might wonder why anyone would use a data structure that requires linear traversal to look up a value instead of just using an array, but they have their uses.
Take our array again. This time, I want to find the array element that holds the value '5'.
=====================================
| 6 | 4 | 2 | 3 | 1 | 5 |
=====================================
^ ^ ^ ^ ^ FOUND!
In this situation, I don't know what offset to add to the pointer to find it, so I have to start at 0, and work my way up until I find it. This means I have to perform 6 checks.
Because of this, searching for a value in an array is considered O(N). The cost of searching increases as the array gets larger.
Remember up above where I said that sometimes using a non sequential data structure can have advantages? Searching for data is one of these advantages and one of the best examples is the Binary Tree.
A Binary Tree is a data structure similar to a linked list, however instead of linking to a single node, each node can link to two children nodes.
==========
| Root |
==========
/ \
========= =========
| Child | | Child |
========= =========
/ \
========= =========
| Child | | Child |
========= =========
Assume that each connector is really a Pointer
When data is inserted into a binary tree, it uses several rules to decide where to place the new node. The basic concept is that if the new value is greater than the parents, it inserts it to the left, if it is lower, it inserts it to the right.
This means that the values in a binary tree could look like this:
==========
| 100 |
==========
/ \
========= =========
| 200 | | 50 |
========= =========
/ \
========= =========
| 75 | | 25 |
========= =========
When searching a binary tree for the value of 75, we only need to visit 3 nodes ( O(log N) ) because of this structure:
Even though there are 5 nodes in our tree, we did not need to look at the remaining two, because we knew that they (and their children) could not possibly contain the value we were looking for. This gives us a search time that at worst case means we have to visit every node, but in the best case we only have to visit a small portion of the nodes.
That is where arrays get beat, they provide a linear O(N) search time, despite O(1) access time.
This is an incredibly high level overview on data structures in memory, skipping over a lot of details, but hopefully it illustrates an array's strength and weakness compared to other data structures.
click()
to the QMainWindow custom slot you have created).Code example:
MainWindow.h
// ...
include "newwindow.h"
// ...
public slots:
void openNewWindow();
// ...
private:
NewWindow *mMyNewWindow;
// ...
}
MainWindow.cpp
// ...
MainWindow::MainWindow()
{
// ...
connect(mMyButton, SIGNAL(click()), this, SLOT(openNewWindow()));
// ...
}
// ...
void MainWindow::openNewWindow()
{
mMyNewWindow = new NewWindow(); // Be sure to destroy your window somewhere
mMyNewWindow->show();
// ...
}
This is an example on how display a custom new window. There are a lot of ways to do this.
SELECT DISTINCT Call.id
FROM Call
LEFT OUTER JOIN Phone_book USING (id)
WHERE Phone_book.id IS NULL
This will return the extra id-s that are missing in your Phone_book table.
This is an API issue, you won't get this error if using Postman/Fielder to send HTTP requests to API. In case of browsers, for security purpose, they always send OPTIONS request/preflight to API before sending the actual requests (GET/POST/PUT/DELETE). Therefore, in case, the request method is OPTION, not only you need to add "Authorization" into "Access-Control-Allow-Headers", but you need to add "OPTIONS" into "Access-Control-allow-methods" as well. This was how I fixed:
if (context.Request.Method == "OPTIONS")
{
context.Response.Headers.Add("Access-Control-Allow-Origin", new[] { (string)context.Request.Headers["Origin"] });
context.Response.Headers.Add("Access-Control-Allow-Headers", new[] { "Origin, X-Requested-With, Content-Type, Accept, Authorization" });
context.Response.Headers.Add("Access-Control-Allow-Methods", new[] { "GET, POST, PUT, DELETE, OPTIONS" });
context.Response.Headers.Add("Access-Control-Allow-Credentials", new[] { "true" });
}
You can get this info from the ResultSet
metadata. See ResultSetMetaData
e.g.
ResultSet rs = stmt.executeQuery("SELECT a, b, c FROM TABLE2");
ResultSetMetaData rsmd = rs.getMetaData();
String name = rsmd.getColumnName(1);
and you can get the column name from there. If you do
select x as y from table
then rsmd.getColumnLabel()
will get you the retrieved label name too.