The operations needed to be performed, require numpy arrays either created via
np.array()
or can be converted from list to an array via
np.stack()
As in the above mentioned case, 2 lists are inputted as operands it triggers the error.
Even if modern browsers support WebSockets now, I think there is no need to throw SocketIO away and it still has its place in any nowadays project. It's easy to understand, and personally, I learned how WebSockets work thanks to SocketIO.
As said in this topic, there's a plenty of integration libraries for Angular, React, etc. and definition types for TypeScript and other programming languages.
The other point I would add to the differences between Socket.io and WebSockets is that clustering with Socket.io is not a big deal. Socket.io offers Adapters that can be used to link it with Redis to enhance scalability. You have ioredis and socket.io-redis for example.
Yes I know, SocketCluster exists, but that's off-topic.
If you're encountering this while debugging in Visual Studio, make sure that the project build path points to a local drive, or follow these steps to grant permissions to the network folder.
URLs are not resolved based on the file structure in the server side. URLs are resolved based on the real public web addresses of the resources in question. It's namely the webbrowser who has got to invoke them, not the webserver.
There are several ways to soften the pain:
JSF EL offers a shorthand to ${pageContext.request}
in flavor of #{request}
:
<li><a href="#{request.contextPath}/index.xhtml">Home</a></li>
<li><a href="#{request.contextPath}/about_us.xhtml">About us</a></li>
You can if necessary use <c:set>
tag to make it yet shorter. Put it somewhere in the master template, it'll be available to all pages:
<c:set var="root" value="#{request.contextPath}/" />
...
<li><a href="#{root}index.xhtml">Home</a></li>
<li><a href="#{root}about_us.xhtml">About us</a></li>
JSF 2.x offers the <h:link>
which can take a view ID relative to the context root in outcome
and it will append the context path and FacesServlet
mapping automatically:
<li><h:link value="Home" outcome="index" /></li>
<li><h:link value="About us" outcome="about_us" /></li>
HTML offers the <base>
tag which makes all relative URLs in the document relative to this base. You could make use of it. Put it in the <h:head>
.
<base href="#{request.requestURL.substring(0, request.requestURL.length() - request.requestURI.length())}#{request.contextPath}/" />
...
<li><a href="index.xhtml">Home</a></li>
<li><a href="about_us.xhtml">About us</a></li>
(note: this requires EL 2.2, otherwise you'd better use JSTL fn:substring()
, see also this answer)
This should end up in the generated HTML something like as
<base href="http://example.com/webname/" />
Note that the <base>
tag has a caveat: it makes all jump anchors in the page like <a href="#top">
relative to it as well! See also Is it recommended to use the <base> html tag? In JSF you could solve it like <a href="#{request.requestURI}#top">top</a>
or <h:link value="top" fragment="top" />
.
I just want to add some remarks to the great answer by Fredrik.
The Java Language Specification in Section 4.3.1 states
An object is a class instance or an array.
So array has indeed a very special role in Java. I do wonder why.
One could argue that current implementation array is/was important for a better performance. But than it is an internal structure, which should not be exposed.
They could of course have masked the property as a method call and handled it in the compiler but I think it would have been even more confusing to have a method on something that isn't a real class.
I agree with Fredrik, that a smart compiler optimazation would have been the better choice. This would also solve the problem, that even if you use a property for arrays, you have not solved the problem for strings and other (immutable) collection types, because, e.g., string
is based on a char
array as you can see on the class definition of String
:
public final class String implements java.io.Serializable, Comparable<String>, CharSequence {
private final char value[]; // ...
And I do not agree with that it would be even more confusing, because array does inherit all methods from java.lang.Object
.
As an engineer I really do not like the answer "Because it has been always this way." and wished there would be a better answer. But in this case it seems to be.
tl;dr
In my opinion, it is a design flaw of Java and should not have implemented this way.
Delegates are a design pattern that allows one object to send messages to another object when a specific event happens. Imagine an object A calls an object B to perform an action. Once the action is complete, object A should know that B has completed the task and take necessary action, this can be achieved with the help of delegates! Here is a tutorial implementing delegates step by step in swift 3
printf("\nmaximum of %d and %d is = %d",a,b,c);
You use something like
from flask import send_file
@app.route('/get_image')
def get_image():
if request.args.get('type') == '1':
filename = 'ok.gif'
else:
filename = 'error.gif'
return send_file(filename, mimetype='image/gif')
to send back ok.gif
or error.gif
, depending on the type query parameter. See the documentation for the send_file
function and the request
object for more information.
You can just return ItemViewType and use it. See below code:
@Override
public int getItemViewType(int position) {
Message item = messageList.get(position);
// return my message layout
if(item.getUsername() == Message.userEnum.I)
return R.layout.item_message_me;
else
return R.layout.item_message; // return other message layout
}
@Override
public ViewHolder onCreateViewHolder(ViewGroup viewGroup, int viewType) {
View view = LayoutInflater.from(viewGroup.getContext()).inflate(viewType, viewGroup, false);
return new ViewHolder(view);
}
If you have both date and time information in the numeric value, then use as.POSIXct
. Data.table package IDateTime format is such a case. If you use fwrite
to save a file, the package automatically converts date-times to idatetime format which is unix time. To convert back to normal format following can be done.
Example: Let's say you have a unix time stamp with date and time info: 1442866615
> as.POSIXct(1442866615,origin="1970-01-01")
[1] "2015-09-21 16:16:54 EDT"
Use USBDeview, from here, http://www.nirsoft.net/utils/usb_devices_view.html
Run as administrator.
Disconnect your phone.
Delete all the drivers associated with your phone. Some will say Android as well as the name and model of the phone.
Plug your phone back in so that Windows re-installs the drivers.
This worked for me, when the other solutions didn't.
const state.contactList = [{
name: 'jane',
email: '[email protected]'
},{},{},...]
const fileredArray = state.contactsList.filter((contactItem) => {
const regex = new RegExp(`${action.payload}`, 'gi');
return contactItem.nameProperty.match(regex) ||
contactItem.emailProperty.match(regex);
});
// contactList: all the contacts stored in state
// action.payload: whatever typed in search field
This fiddle shows how
ul, li {
display:inline
}
Great references on lists and css here:
Match it against a regular expression.
c.f. http://forums.mysql.com/read.php?60,1907,38488#msg-38488 as quoted below:
Re: IsNumeric() clause in MySQL??
Posted by: kevinclark ()
Date: August 08, 2005 01:01PM
I agree. Here is a function I created for MySQL 5:
CREATE FUNCTION IsNumeric (sIn varchar(1024)) RETURNS tinyint
RETURN sIn REGEXP '^(-|\\+){0,1}([0-9]+\\.[0-9]*|[0-9]*\\.[0-9]+|[0-9]+)$';
This allows for an optional plus/minus sign at the beginning, one optional decimal point, and the rest numeric digits.
My suggestion is to use a function. But rather than putting the if
in the function, which you might be tempted to do, do it like this:
if verbose:
def verboseprint(*args):
# Print each argument separately so caller doesn't need to
# stuff everything to be printed into a single string
for arg in args:
print arg,
print
else:
verboseprint = lambda *a: None # do-nothing function
(Yes, you can define a function in an if
statement, and it'll only get defined if the condition is true!)
If you're using Python 3, where print
is already a function (or if you're willing to use print
as a function in 2.x using from __future__ import print_function
) it's even simpler:
verboseprint = print if verbose else lambda *a, **k: None
This way, the function is defined as a do-nothing if verbose mode is off (using a lambda), instead of constantly testing the verbose
flag.
If the user could change the verbosity mode during the run of your program, this would be the wrong approach (you'd need the if
in the function), but since you're setting it with a command-line flag, you only need to make the decision once.
You then use e.g. verboseprint("look at all my verbosity!", object(), 3)
whenever you want to print a "verbose" message.
The numpy.savetxt()
method has several parameters which are worth noting:
fmt : str or sequence of strs, optional
it is used to format the numbers in the array, see the doc for details on formatingdelimiter : str, optional
String or character separating columnsnewline : str, optional
String or character separating lines.
Let's take an example. I have an array of size (M, N)
, which consists of integer numbers in the range (0, 255). To save the array row-wise and show it nicely, we can use the following code:
import numpy as np
np.savetxt("my_array.txt", my_array, fmt="%4d", delimiter=",", newline="\n")
As Jon Skeet states, there is no way except by using reflection.
However, if reflection is an option for you, you can do this.
public static void main(String[] args) {
System.out.println("please enter a password");
// don't actually do this, this is an example only.
Scanner in = new Scanner(System.in);
String password = in.nextLine();
usePassword(password);
clearString(password);
System.out.println("password: '" + password + "'");
}
private static void usePassword(String password) {
}
private static void clearString(String password) {
try {
Field value = String.class.getDeclaredField("value");
value.setAccessible(true);
char[] chars = (char[]) value.get(password);
Arrays.fill(chars, '*');
} catch (Exception e) {
throw new AssertionError(e);
}
}
when run
please enter a password
hello world
password: '***********'
Note: if the String's char[] has been copied as a part of a GC cycle, there is a chance the previous copy is somewhere in memory.
This old copy wouldn't appear in a heap dump, but if you have direct access to the raw memory of the process you could see it. In general you should avoid anyone having such access.
My images are kept in a "hidden" folder above "www" so that only logged users are allowed access to them. For this reason I cannot use the ordinary <img src=/somefolder/1023.jpg>
but I send requests to the server like <img src=?1023>
and it responds by sending back the image kept under name '1023'.
The application is used for image cropping, so after an ajax request to crop the image, it is changed as content on the server but keeps its original name. In order to see the result of the cropping, after the ajax request has been completed, the first image is removed from the DOM and a new image is inserted with the same name <img src=?1023>
.
To avoid cashing I add to the request the "time" tag prepended with "#" so it becomes like <img src=?1023#1467294764124>
. The server automatically filters out the hash part of the request and responds correctly by sending back my image kept as '1023'. Thus I always get the last version of the image without much server-side decoding.
To start Jenkins from command line
Go to the directory where your war file is placed and run the following command:
java -jar jenkins.war
To stop
Ctrl + C
In Addition to all the previous answers, I would do it using RxJS Observables
please check Observable.timer
Here is a sample code, will start after 2 seconds and then ticks every second:
import {Component} from 'angular2/core';
import {Observable} from 'rxjs/Rx';
@Component({
selector: 'my-app',
template: 'Ticks (every second) : {{ticks}}'
})
export class AppComponent {
ticks =0;
ngOnInit(){
let timer = Observable.timer(2000,1000);
timer.subscribe(t=>this.ticks = t);
}
}
And here is a working plunker
Update If you want to call a function declared on the AppComponent class, you can do one of the following:
** Assuming the function you want to call is named func,
ngOnInit(){
let timer = Observable.timer(2000,1000);
timer.subscribe(this.func);
}
The problem with the above approach is that if you call 'this' inside func, it will refer to the subscriber object instead of the AppComponent object which is probably not what you want.
However, in the below approach, you create a lambda expression and call the function func inside it. This way, the call to func is still inside the scope of AppComponent. This is the best way to do it in my opinion.
ngOnInit(){
let timer = Observable.timer(2000,1000);
timer.subscribe(t=> {
this.func(t);
});
}
check this plunker for working code.
Keep in mind this overwrites any ID that the element already has:
$(".element").attr("id","SomeID");
The reason why addClass
exists is because an element can have multiple classes, so you wouldn't want to necessarily overwrite the classes already set. But with most attributes, there is only one value allowed at any given time.
Using Moment, Underscore and jQuery, to iterate an array of dates.
Sample JSON:
"workerList": [{
"shift_start_dttm": "13/06/2017 20:21",
"shift_end_dttm": "13/06/2017 23:59"
}, {
"shift_start_dttm": "03/04/2018 00:00",
"shift_end_dttm": "03/05/2018 00:00"
}]
Javascript:
function getMinStartDttm(workerList) {
if(!_.isEmpty(workerList)) {
var startDtArr = [];
$.each(d.workerList, function(index,value) {
startDtArr.push(moment(value.shift_start_dttm.trim(), 'DD/MM/YYYY HH:mm'));
});
var startDt = _.min(startDtArr);
return start.format('DD/MM/YYYY HH:mm');
} else {
return '';
}
}
Hope it helps.
This is an interesting question, but I don't think this is actually possible. Whether or not two colors "fit" as background and foreground colors is dependent upon display technology and physiological characteristics of human vision, but most importantly on upon personal tastes shaped by experience. A quick run through MySpace shows pretty clearly that not all human beings perceive colors in the same way. I don't think this is a problem that can be solved algorithmically, although there may be a huge database somewhere of acceptable matching colors.
You say your SQL compiles fine, but I get: Must declare the scalar variable "@Password".
Also you are trying to return a varchar (@b) from your stored procedure, but SQL Server stored procedures can only return integers.
When you run the procedure you are going to get the error:
'Conversion failed when converting the varchar value 'x' to data type int.'
I know this is a little old, but for anyone stumbling across this page should know there is a difference between \n and \r\n.
The \r\n gives a CRLF end of line and the \n gives an LF end of line character. There is very little difference to the eye in general.
Create a .txt from the string and then try and open in notepad (normal not notepad++) and you will notice the difference
SHA,PCT,PRACTICE,BNF CODE,BNF NAME,ITEMS,NIC,ACT COST,QUANTITY,PERIOD
Q44,01C,N81002,0101021B0AAALAL,Sod Algin/Pot Bicarb_Susp S/F,3,20.48,19.05,2000,201901
Q44,01C,N81002,0101021B0AAAPAP,Sod Alginate/Pot Bicarb_Tab Chble 500mg,1,3.07,2.86,60,201901
The above is using 'CRLF' and the below is what 'LF only' would look like (There is a character that cant be seen where the LF shows).
SHA,PCT,PRACTICE,BNF CODE,BNF NAME,ITEMS,NIC,ACT COST,QUANTITY,PERIODQ44,01C,N81002,0101021B0AAALAL,Sod Algin/Pot Bicarb_Susp S/F,3,20.48,19.05,2000,201901Q44,01C,N81002,0101021B0AAAPAP,Sod Alginate/Pot Bicarb_Tab Chble 500mg,1,3.07,2.86,60,201901
If the Line Ends need to be corrected and the file is small enough in size, you can change the line endings in NotePad++ (or paste into word then back into Notepad - although this will make CRLF only).
This may cause some functions that read these files to potenitially no longer function (The example lines given are from GP Prescribing data - England. The file has changed from a CRLF Line end to an LF line end). This stopped an SSIS job from running and failed as couldn't read the LF line endings.
Source of Line Ending Information: https://en.wikipedia.org/wiki/Newline#Representations_in_different_character_encoding_specifications
Hope this helps someone in future :) CRLF = Windows based, LF or CF are from Unix based systems (Linux, MacOS etc.)
As of OS X 10.10.1 (Yosemite), the location of the cacerts
file has been changed to
$(/usr/libexec/java_home)/jre/lib/security/cacerts
I think its better you read data of text file in DataSet
Try out SqlBulkCopy - Bulk Insert into SQL from C# App
// connect to SQL
using (SqlConnection connection = new SqlConnection(connString))
{
// make sure to enable triggers
// more on triggers in next post
SqlBulkCopy bulkCopy = new SqlBulkCopy(
connection,
SqlBulkCopyOptions.TableLock |
SqlBulkCopyOptions.FireTriggers |
SqlBulkCopyOptions.UseInternalTransaction,
null
);
// set the destination table name
bulkCopy.DestinationTableName = this.tableName;
connection.Open();
// write the data in the "dataTable"
bulkCopy.WriteToServer(dataTable);
connection.Close();
}
// reset
this.dataTable.Clear();
or
after doing step 1 at the top
you can check this article for detail : Bulk Insertion of Data Using C# DataTable and SQL server OpenXML function
But its not tested with 2 million record, it will do but consume memory on machine as you have to load 2 million record and insert it.
with zxing this is my code for create QR
QRCodeWriter writer = new QRCodeWriter();
try {
BitMatrix bitMatrix = writer.encode(content, BarcodeFormat.QR_CODE, 512, 512);
int width = bitMatrix.getWidth();
int height = bitMatrix.getHeight();
Bitmap bmp = Bitmap.createBitmap(width, height, Bitmap.Config.RGB_565);
for (int x = 0; x < width; x++) {
for (int y = 0; y < height; y++) {
bmp.setPixel(x, y, bitMatrix.get(x, y) ? Color.BLACK : Color.WHITE);
}
}
((ImageView) findViewById(R.id.img_result_qr)).setImageBitmap(bmp);
} catch (WriterException e) {
e.printStackTrace();
}
I checked your XAML, it works fine - e.g. both labels have a gray foreground.
My guess is that you have some style which is affecting the way it looks...
Try moving your XAML to a brand-new window and see for yourself... Then, check if you have any themes or styles (in the Window.Resources
for instance) which might be affecting the labels...
this is enough to check if a year is a leap year.
if( (year%400==0 || year%100!=0) &&(year%4==0))
cout<<"It is a leap year";
else
cout<<"It is not a leap year";
mysql> SET PASSWORD for 'root'@'localhost' = password('yournewpassword');
Check this out... https://hsnyc.co/how-to-set-the-mysql-root-password-in-localhost-using-wamp/
For the benefit of anyone searching for similar, see worksheet .UsedRange
,
e.g. ? ActiveSheet.UsedRange.Rows.Count
and loops such as
For Each loopRow in Sheets(1).UsedRange.Rows: Print loopRow.Row: Next
VBA is not VB/VB.NET
The correct reference to use is Do..Loop Statement (VBA). Also see the article Excel VBA For, Do While, and Do Until. One way to write this is:
Do While counter < 20
counter = counter + 1
Loop
(But a For..Next might be more appropriate here.)
Happy coding.
Using SSH
git remote add origin ssh://login@IP/path/to/repository
Using HTTP
git remote add origin http://IP/path/to/repository
However having a simple git pull
as a deployment process is usually a bad idea and should be avoided in favor of a real deployment script.
inline
instructs the compiler to attempt to embed the function content into the calling code instead of executing an actual call.
For small functions that are called frequently that can make a big performance difference.
However, this is only a "hint", and the compiler may ignore it, and most compilers will try to "inline" even when the keyword is not used, as part of the optimizations, where its possible.
for example:
static int Inc(int i) {return i+1};
.... // some code
int i;
.... // some more code
for (i=0; i<999999; i = Inc(i)) {/*do something here*/};
This tight loop will perform a function call on each iteration, and the function content is actually significantly less than the code the compiler needs to put to perform the call. inline
will essentially instruct the compiler to convert the code above into an equivalent of:
int i;
....
for (i=0; i<999999; i = i+1) { /* do something here */};
Skipping the actual function call and return
Obviously this is an example to show the point, not a real piece of code.
static
refers to the scope. In C it means that the function/variable can only be used within the same translation unit.
I know this is very late, but is useful for newbies. We can atuload url helper and it will be available throughout the application. For this in application\config\autoload.php modify as follows -
$autoload['helper'] = array('url');
My favorite register is the ':'
register. Running @:
in Normal mode allows me to repeat the previously ran ex command.
If you need a progmatic solution this should work in jQuery:
$(".abc.xyz").css("width", 200);
I know this is older one, but doesn't carry the simple answer, I needed this method for my coding so I added here, simple to use.
public static String toTitleCase(String input) {
input = input.toLowerCase();
char c = input.charAt(0);
String s = new String("" + c);
String f = s.toUpperCase();
return f + input.substring(1);
}
Your debut
and fin
values are floating point values, not integers, because taille
is a float.
Make those values integers instead:
item = plateau[int(debut):int(fin)]
Alternatively, make taille
an integer:
taille = int(sqrt(len(plateau)))
There was an issue with a build of Google Chrome Dev build 24.0.1312.5 that caused the preview panel to no longer display a json object tree but rather flat text. It should be fixed in the next dev
See more here: http://code.google.com/p/chromium/issues/detail?id=160733
The answer of Pardeep Jain can be useful for static data, but what if we have an array in JSON?
For example, we have i values and get the value of id field
alert(obj[i].id); //works!
But what if we need key with spaces?
In this case, the following construction can help (without point between [] blocks):
alert(obj[i]["No. of interfaces"]); //works too!
The original question concerns infinity. So, why not use
#define Infinity ((double)(42 / 0.0))
according to the IEEE definition? You can negate that of course.
Use the dist()
function, but you need to form a matrix from the two inputs for the first argument to dist()
:
dist(rbind(x1, x2))
For the input in the OP's question we get:
> dist(rbind(x1, x2))
x1
x2 7.94821
a single value that is the Euclidean distance between x1
and x2
.
NestedScrollView
as the name suggests is used when there is a need for a scrolling view inside another scrolling view. Normally this would be difficult to accomplish since the system would be unable to decide which view to scroll.
This is where NestedScrollView
comes in.
You could use the rename() function :
rename('foo/test.php', 'bar/test.php');
This however will move the file not copy
I know this is an older subject, however Mocking a MVC application for unit tests is something we do on very regular basis.
I just wanted to add my experiences Mocking a MVC 3 application using Moq 4 after upgrading to Visual Studio 2013. None of the unit tests were working in debug mode and the HttpContext was showing "could not evaluate expression" when trying to peek at the variables.
Turns out visual studio 2013 has issues evaluating some objects. To get debugging mocked web applications working again, I had to check the "Use Managed Compatibility Mode" in Tools=>Options=>Debugging=>General settings.
I generally do something like this:
public static class FakeHttpContext
{
public static void SetFakeContext(this Controller controller)
{
var httpContext = MakeFakeContext();
ControllerContext context =
new ControllerContext(
new RequestContext(httpContext,
new RouteData()), controller);
controller.ControllerContext = context;
}
private static HttpContextBase MakeFakeContext()
{
var context = new Mock<HttpContextBase>();
var request = new Mock<HttpRequestBase>();
var response = new Mock<HttpResponseBase>();
var session = new Mock<HttpSessionStateBase>();
var server = new Mock<HttpServerUtilityBase>();
var user = new Mock<IPrincipal>();
var identity = new Mock<IIdentity>();
context.Setup(c=> c.Request).Returns(request.Object);
context.Setup(c=> c.Response).Returns(response.Object);
context.Setup(c=> c.Session).Returns(session.Object);
context.Setup(c=> c.Server).Returns(server.Object);
context.Setup(c=> c.User).Returns(user.Object);
user.Setup(c=> c.Identity).Returns(identity.Object);
identity.Setup(i => i.IsAuthenticated).Returns(true);
identity.Setup(i => i.Name).Returns("admin");
return context.Object;
}
}
And initiating the context like this
FakeHttpContext.SetFakeContext(moController);
And calling the Method in the controller straight forward
long lReportStatusID = -1;
var result = moController.CancelReport(lReportStatusID);
You can use boost::lexical_cast:
#include <iostream>
#include <boost/lexical_cast.hpp>
int main( int argc, char* argv[] ){
std::string s1 = "10";
std::string s2 = "abc";
int i;
try {
i = boost::lexical_cast<int>( s1 );
}
catch( boost::bad_lexical_cast & e ){
std::cout << "Exception caught : " << e.what() << std::endl;
}
try {
i = boost::lexical_cast<int>( s2 );
}
catch( boost::bad_lexical_cast & e ){
std::cout << "Exception caught : " << e.what() << std::endl;
}
return 0;
}
You use Array.GetLength with the index of the dimension you wish to retrieve.
Many answers here tells to delete a specific k8s object, but you can delete multiple objects at once, instead of one by one:
kubectl delete deployments,jobs,services,pods --all -n <namespace>
In my case, I'm running OpenShift cluster with OLM - Operator Lifecycle Manager. OLM is the one who controls the deployment, so when I deleted the deployment, it was not sufficient to stop the pods from restarting.
Only when I deleted OLM and its subscription, the deployment, services and pods were gone.
First list all k8s objects in your namespace:
$ kubectl get all -n openshift-submariner
NAME READY STATUS RESTARTS AGE
pod/submariner-operator-847f545595-jwv27 1/1 Running 0 8d
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
service/submariner-operator-metrics ClusterIP 101.34.190.249 <none> 8383/TCP 8d
NAME READY UP-TO-DATE AVAILABLE AGE
deployment.apps/submariner-operator 1/1 1 1 8d
NAME DESIRED CURRENT READY AGE
replicaset.apps/submariner-operator-847f545595 1 1 1 8d
OLM is not listed with get all
, so I search for it specifically:
$ kubectl get olm -n openshift-submariner
NAME AGE
operatorgroup.operators.coreos.com/openshift-submariner 8d
NAME DISPLAY VERSION
clusterserviceversion.operators.coreos.com/submariner-operator Submariner 0.0.1
Now delete all objects, including OLMs, subscriptions, deployments, replica-sets, etc:
$ kubectl delete olm,svc,rs,rc,subs,deploy,jobs,pods --all -n openshift-submariner
operatorgroup.operators.coreos.com "openshift-submariner" deleted
clusterserviceversion.operators.coreos.com "submariner-operator" deleted
deployment.extensions "submariner-operator" deleted
subscription.operators.coreos.com "submariner" deleted
service "submariner-operator-metrics" deleted
replicaset.extensions "submariner-operator-847f545595" deleted
pod "submariner-operator-847f545595-jwv27" deleted
List objects again - all gone:
$ kubectl get all -n openshift-submariner
No resources found.
$ kubectl get olm -n openshift-submariner
No resources found.
Apply (different) name attribute to both buttons like
<button name="one">
and catch them in request.data.
adb install -r exampleApp.apk
(The -r
makes it replace the existing copy, add an -s
if installing on an emulator)
Make sure the app is signed the same and is the same debug/release
variant
I set up an alias in my ~/.bash_profile
, to make it a 2char command.
alias bi="gradlew && adb install -r exampleApp.apk"
(Short for Build and Install)
try this script..
#!/bin/bash
NULL="_"
for f in `svn st|grep -v ^\?|sed s/.\ *//`;
do LIST="${LIST} $f $NULL on";
done
dialog --checklist "Select files to commit" 30 60 30 $LIST 2>/tmp/svnlist.txt
svn ci `cat /tmp/svnlist.txt|sed 's/"//g'`
The problem arises when a different system grabs the $ variable. You have multiple $ variables being used as objects from multiple libraries, resulting in the error.
To solve it, use jQuery.noConflict just before your (function($){
:
jQuery.noConflict();
(function($){
$.fn.pluginbutton = function (options) {
...
You should use the secondary constructor for File
to specify the directory in which it is to be symbolically created. This is important because the answers that say to create a file by prepending the directory name to original name, are not as system independent as this method.
Sample code:
String dirName = /* something to pull specified dir from input */;
String fileName = "test.txt";
File dir = new File (dirName);
File actualFile = new File (dir, fileName);
/* rest is the same */
Hope it helps.
If I'm not mistaken, the following does what was asked without the memory problems of the transpose solution and with fewer lines than @kalu 's function, keeping the first of any similarly named columns.
Cols = list(df.columns)
for i,item in enumerate(df.columns):
if item in df.columns[:i]: Cols[i] = "toDROP"
df.columns = Cols
df = df.drop("toDROP",1)
I had to add this:
bootRun {
String activeProfile = System.properties['spring.profiles.active']
String confLoc = System.properties['spring.config.location']
systemProperty "spring.profiles.active", activeProfile
systemProperty "spring.config.location", "file:$confLoc"
}
And now bootRun picks up the profile and config locations.
Thanks a lot @jst for the pointer.
Use a Queue
Queue<String> qe=new LinkedList<String>();
qe.add("a");
qe.add("b");
qe.add("c");
qe.add("d");
System.out.println(qe.poll()); //returns a
System.out.println(qe.poll()); //returns b
System.out.println(qe.poll()); //returns c
System.out.println(qe.poll()); //returns d
There's five simple methods of a Queue
element() -- Retrieves, but does not remove, the head of this queue.
offer(E o) -- Inserts the specified element into this queue, if
possible.
peek() -- Retrieves, but does not remove, the head of this queue, returning null if this queue is empty.
poll() -- Retrieves and removes the head of this queue, or null if this queue is empty.
Some suggestions for this -
The following query is very helpful
select * from
(select count(*) used from pg_stat_activity) q1,
(select setting::int res_for_super from pg_settings where name=$$superuser_reserved_connections$$) q2,
(select setting::int max_conn from pg_settings where name=$$max_connections$$) q3;
Until I get a better option, this is the most "bootstrappy" answer I can work out:
JSFiddle: http://jsfiddle.net/TrueBlueAussie/6cbrjrt5/
I have switched to using LESS and including the Bootstrap Source NuGet package to ensure compatibility (by giving me access to the bootstrap variables.less
file:
in _layout.cshtml master page
body-content
containernavbar-fixed-bottom
on the footer<hr/>
before the footer (as now redundant)Relevant page HTML:
<div class="container-fluid body-content">
@RenderBody()
</div>
<footer class="navbar-fixed-bottom">
<p>© @DateTime.Now.Year - My ASP.NET Application</p>
</footer>
In Site.less
HTML
and BODY
heights to 100%BODY
overflow
to hidden
body-content
div position
to absolute
body-content
div top
to @navbar-height
instead of hard-wiring valuebody-content
div bottom
to 30px
.body-content
div left
and right
to 0body-content
div overflow-y
to auto
Site.less
html {
height: 100%;
body {
height: 100%;
overflow: hidden;
.container-fluid.body-content {
position: absolute;
top: @navbar-height;
bottom: 30px;
right: 0;
left: 0;
overflow-y: auto;
}
}
}
The remaining problem is there seems to be no defining variable for the footer height
in bootstrap. If someone call tell me if there is a magic 30px variable defined in Bootstrap I would appreciate it.
It may be obvious, but it still was surprising to me, that SET NAMES utf8
is not compatible with utf8mb4
encoding. So for some apps changing table/column encoding was not enough. I had to change encoding in app configuration.
Redmine (ruby, ROR)
In config/database.yml
:
production:
adapter: mysql2
database: redmine
host: localhost
username: redmine
password: passowrd
encoding: utf8mb4
Custom Yii application (PHP)
In config/db.php
:
return [
'class' => yii\db\Connection::class,
'dsn' => 'mysql:host=localhost;dbname=yii',
'username' => 'yii',
'password' => 'password',
'charset' => 'utf8mb4',
],
If you have utf8mb4
as a column/table encoding and still getting errors like this, make sure that you have configured correct charset for DB connection in your application.
If you have date in integers, you could use like here:
Date date = new Date();
date.setYear(2010);
date.setMonth(07);
date.setDate(14)
date.setHours(9);
date.setMinutes(0);
date.setSeconds(0);
String time = new SimpleDateFormat("HH:mm:ss").format(date);
This could help:
public static String getCorporateID(String fileName) {
String corporateId = null;
try {
corporateId = fileName.substring(0, fileName.indexOf("_"));
// System.out.println(new Date() + ": " + "Corporate:
// "+corporateId);
return corporateId;
} catch (Exception e) {
corporateId = null;
e.printStackTrace();
}
return corporateId;
}
A static library(.a) is a library that can be linked directly into the final executable produced by the linker,it is contained in it and there is no need to have the library into the system where the executable will be deployed.
A shared library(.so) is a library that is linked but not embedded in the final executable, so will be loaded when the executable is launched and need to be present in the system where the executable is deployed.
A dynamic link library on windows(.dll) is like a shared library(.so) on linux but there are some differences between the two implementations that are related to the OS (Windows vs Linux) :
A DLL can define two kinds of functions: exported and internal. The exported functions are intended to be called by other modules, as well as from within the DLL where they are defined. Internal functions are typically intended to be called only from within the DLL where they are defined.
An SO library on Linux doesn't need special export statement to indicate exportable symbols, since all symbols are available to an interrogating process.
Both approaches will catch all exceptions. There is no significant difference between your two code examples except that the first will generate a compiler warning because ex
is declared but not used.
But note that some exceptions are special and will be rethrown automatically.
ThreadAbortException
is a special exception that can be caught, but it will automatically be raised again at the end of the catch block.
http://msdn.microsoft.com/en-us/library/system.threading.threadabortexception.aspx
As mentioned in the comments, it is usually a very bad idea to catch and ignore all exceptions. Usually you want to do one of the following instead:
Catch and ignore a specific exception that you know is not fatal.
catch (SomeSpecificException)
{
// Ignore this exception.
}
Catch and log all exceptions.
catch (Exception e)
{
// Something unexpected went wrong.
Log(e);
// Maybe it is also necessary to terminate / restart the application.
}
Catch all exceptions, do some cleanup, then rethrow the exception.
catch
{
SomeCleanUp();
throw;
}
Note that in the last case the exception is rethrown using throw;
and not throw ex;
.
Thanks to duncan answer, I end up with this:
marker.addListener('mouseover', () => infoWindow.open(map, marker))
marker.addListener('mouseout', () => infoWindow.close())
I think the main difference is security.
Windows Authentication means that the identity is handled as part of the windows handashaking and now password is ever 'out there' for interception.
SQL Authentication means that you have to store (or provide) a username and a password yourself making it much easier to breach. A heap of effort has gone into making windows authentication very robust and secure.
Might I suggest that if you do implement Windows Authentication use Groups and Roles to do it. Groups in Windows and Roles in SQL. Having to setup lots of users in SQL is a big pain when you can just setup the group and then add each user to the group. (I think most security should be done this way anyway).
Here is a one-liner that will uppercase the first letter and leave the case of all subsequent letters:
import re
key = 'wordsWithOtherUppercaseLetters'
key = re.sub('([a-zA-Z])', lambda x: x.groups()[0].upper(), key, 1)
print key
This will result in WordsWithOtherUppercaseLetters
Because "not ... =" is two operations and "<>" is only one, it is faster to use "<>".
Here is a quick experiment to prove it:
StartTime = Timer
For x = 1 to 100000000
If 4 <> 3 Then
End if
Next
WScript.echo Timer-StartTime
StartTime = Timer
For x = 1 to 100000000
If Not (4 = 3) Then
End if
Next
WScript.echo Timer-StartTime
The results I get on my machine:
4.783203
5.552734
There is no 'jQuery' magic, just JavaScript timers.
var pressTimer;
$("a").mouseup(function(){
clearTimeout(pressTimer);
// Clear timeout
return false;
}).mousedown(function(){
// Set timeout
pressTimer = window.setTimeout(function() { ... Your Code ...},1000);
return false;
});
Finally I did a small test and while I was programming it it came to my mind, that without the setNull(..) method there would be no way to set null values for the Java primitives. For Objects both ways
setNull(..)
and
set<ClassName>(.., null))
behave the same way.
You use List#get(int index)
to get an object with the index index
in the list. You use it like that:
List<ExampleClass> list = new ArrayList<ExampleClass>();
list.add(new ExampleClass());
list.add(new ExampleClass());
list.add(new ExampleClass());
ExampleClass exampleObj = list.get(2); // will get the 3rd element in the list (index 2);
Here I tried this, that work great for me.
$('a[href*="#"]').on('click', function (e) {
e.preventDefault();
$('html, body').animate({
scrollTop: $($(this).attr('href')).offset().top
}, 500, 'linear');
});
HTML:
<a href="#fast-food" class="active" data-toggle="tab" >FAST FOOD</a>
<div id="fast-food">
<p> Scroll Here... </p>
</div>
You can parse the text as a string, which creates an Element, and create an ElementTree using that Element.
import xml.etree.ElementTree as ET
tree = ET.ElementTree(ET.fromstring(xmlstring))
I just came across this issue and the documentation, while complete, is not very straightforward on the difference in usage between the parse()
and fromstring()
methods.
Have you closed the < web-app > tag in your web.xml? From what you have posted, the closing tag seems to be missing.
If both your client and service is installed on the same machine, and you are facing this problem with the correct (read: tried and tested elsewhere) client and service configurations, then this might be worth checking.
Check host entries in your host file
%windir%/system32/drivers/etc/hosts
Check to see if you are accessing your web service with a hostname, and that same hostname has been associated with an IP address in the hosts file mentioned above. If yes, NTLM/Windows credentials will NOT be passed from the client to the service as any request for that hostname will be routed again at the machine level.
Try either of the following
Edit: Somehow the above situation is relevant on a load-balanced scenario. However, if removing the host entries is not possible, then disabling loop back check on the machine will help. Refer method 2 in the article https://support.microsoft.com/en-us/kb/896861
According to python docs:
has_key()
is deprecated in favor ofkey in d
.
I've used this successfully inside R script:
library("reshape2",lib.loc="/path/to/R-packages/")
useful if for whatever reason libraries are in more than one place.
System.Threading.Thread.CurrentThread.Name
System.Threading.Thread.CurrentThread.ManagedThreadId
ShieldUI's export to excel functionality should already support all special chars.
Maybe you have to encode the video specifically for the device eg:
<video id="movie" width="320" height="240" autobuffer controls>
<source src="pr6.ogv" type='video/ogg; codecs="theora, vorbis"'>
<source src="pr6.mp4" type='video/mp4; codecs="avc1.42E01E, mp4a.40.2"'>
<source src="pr6.mp4" type='video/mp4; codecs="some droid video codec, some droid audio codec"'>
</video>
There are some examples of encoding configurations that worked on here:
You haven't specified what the query should return if more than one document is added at the same time, so this query assumes you want all of them returned:
SELECT t.ID,
t.USER_ID,
t.DATE_ADDED,
t.DATE_VIEWED,
t.DOCUMENT_ID,
t.URL,
t.DOCUMENT_TITLE,
t.DOCUMENT_DATE
FROM (
SELECT test_table.*,
RANK()
OVER (ORDER BY DOCUMENT_DATE DESC) AS the_rank
FROM test_table
WHERE user_id = value
)
WHERE the_rank = 1;
This query will only make one pass through the data.
Don't make data frames. Keep the list, name its elements but do not attach it.
The biggest reason for this is that if you make variables on the go, almost always you will later on have to iterate through each one of them to perform something useful. There you will again be forced to iterate through each one of the names that you have created on the fly.
It is far easier to name the elements of the list and iterate through the names.
As far as attach is concerned, its really bad programming practice in R and can lead to a lot of trouble if you are not careful.
I use this on mongoimport shell
mongoimport --db db_name --collection collection_name --type csv --file C:\\Your_file_path\target_file.csv --headerline
type can choose csv/tsv/json
But only csv/tsv can use --headerline
You can read more on the offical doc.
To write your own pseudo random generator is quite simple.
The suggestion of Dave Scotese is useful but, as pointed out by others, it is not quite uniformly distributed.
However, it is not because of the integer arguments of sin. It's simply because of the range of sin, which happens to be a one dimensional projection of a circle. If you would take the angle of the circle instead it would be uniform.
So instead of sin(x) use arg(exp(i * x)) / (2 * PI).
If you don't like the linear order, mix it a bit up with xor. The actual factor doesn't matter that much either.
To generate n pseudo random numbers one could use the code:
function psora(k, n) {
var r = Math.PI * (k ^ n)
return r - Math.floor(r)
}
n = 42; for(k = 0; k < n; k++) console.log(psora(k, n))
Please also note that you cannot use pseudo random sequences when real entropy is needed.
After reading Byte Commander's answer, I want to introduce a tiny possible improvement:
You can generate a regexp that will match either n
words, as long as your n
is predetermined. For instance, if I want to match between 1 and 3 words, the regexp:
^([A-Z]+)(?:,([A-Z]+))?(?:,([A-Z]+))?$
will match the next sentences, with one, two or three capturing groups.
HELLO,LITTLE,WORLD
HELLO,WORLD
HELLO
You can see a fully detailed explanation about this regular expression on Regex101.
As I said, it is pretty easy to generate this regexp for any groups you want using your favorite language. Since I'm not much of a swift guy, here's a ruby example:
def make_regexp(group_regexp, count: 3, delimiter: ",")
regexp_str = "^(#{group_regexp})"
(count - 1).times.each do
regexp_str += "(?:#{delimiter}(#{group_regexp}))?"
end
regexp_str += "$"
return regexp_str
end
puts make_regexp("[A-Z]+")
That being said, I'd suggest not using regular expression in that case, there are many other great tools from a simple split
to some tokenization patterns depending on your needs. IMHO, a regular expression is not one of them. For instance in ruby I'd use something like str.split(",")
or str.scan(/[A-Z]+/)
getActivity().getSupportFragmentManager().beginTransaction().replace(GeneralInfo.this.getId(), new GeneralInfo()).commit();
GeneralInfo
it's my Fragment class GeneralInfo.java
I put it as a method in the fragment class:
public void Reload(){
getActivity().getSupportFragmentManager().beginTransaction().replace(LogActivity.this.getId(), new LogActivity()).commit();
}
I don't think there is a way to ignore adding DEFINER
s to the dump. But there are ways to remove them after the dump file is created.
Open the dump file in a text editor and replace all occurrences of DEFINER=root@localhost
with an empty string ""
Edit the dump (or pipe the output) using perl
:
perl -p -i.bak -e "s/DEFINER=\`\w.*\`@\`\d[0-3].*[0-3]\`//g" mydatabase.sql
mysqldump ... | sed -e 's/DEFINER[ ]*=[ ]*[^*]*\*/\*/' > triggers_backup.sql
Here's my much shorter implementation:
Object.unflatten = function(data) {
"use strict";
if (Object(data) !== data || Array.isArray(data))
return data;
var regex = /\.?([^.\[\]]+)|\[(\d+)\]/g,
resultholder = {};
for (var p in data) {
var cur = resultholder,
prop = "",
m;
while (m = regex.exec(p)) {
cur = cur[prop] || (cur[prop] = (m[2] ? [] : {}));
prop = m[2] || m[1];
}
cur[prop] = data[p];
}
return resultholder[""] || resultholder;
};
flatten
hasn't changed much (and I'm not sure whether you really need those isEmpty
cases):
Object.flatten = function(data) {
var result = {};
function recurse (cur, prop) {
if (Object(cur) !== cur) {
result[prop] = cur;
} else if (Array.isArray(cur)) {
for(var i=0, l=cur.length; i<l; i++)
recurse(cur[i], prop + "[" + i + "]");
if (l == 0)
result[prop] = [];
} else {
var isEmpty = true;
for (var p in cur) {
isEmpty = false;
recurse(cur[p], prop ? prop+"."+p : p);
}
if (isEmpty && prop)
result[prop] = {};
}
}
recurse(data, "");
return result;
}
Together, they run your benchmark in about the half of the time (Opera 12.16: ~900ms instead of ~ 1900ms, Chrome 29: ~800ms instead of ~1600ms).
Note: This and most other solutions answered here focus on speed and are susceptible to prototype pollution and shold not be used on untrusted objects.
You need to put your code into ngOnInit
and use the this
keyword:
ngOnInit() {
this.booksByStoreID = this.books.filter(
book => book.store_id === this.store.id);
}
You need ngOnInit
because the input store
wouldn't be set into the constructor:
ngOnInit is called right after the directive's data-bound properties have been checked for the first time, and before any of its children have been checked. It is invoked only once when the directive is instantiated.
(https://angular.io/docs/ts/latest/api/core/index/OnInit-interface.html)
In your code, the books filtering is directly defined into the class content...
The content inside strings in Golang can be compared using ==
operator. If the results are not as expected there may be some hidden characters like \n
, \r
, spaces, etc. So as a general rule of thumb, try removing those using functions provided by strings
package in golang.
For Instance, spaces can be removed using strings.TrimSpace
function. You can also define a custom function to remove any character you need. strings.TrimFunc
function can give you more power.
No, there is no CSS property for minimum or maximum font size. Browsers often have a setting for minimum font size, but that’s under the control of the user, not an author.
You can use @media
queries to make some CSS settings depending on things like screen or window width. In such settings, you can e.g. set the font size to a specific small value if the window is very narrow.
PS> Add-Type -Assembly Microsoft.VisualBasic
PS> [Microsoft.VisualBasic.Information]::IsNumeric(1.5)
True
http://msdn.microsoft.com/en-us/library/microsoft.visualbasic.information.isnumeric.aspx
I have modified @skafandri answer to avoid re-apply the datepicker
constructor to all inputs with .datepicker_recurring_start
class.
Here's the HTML:
<div id="content"></div>
<button id="cmd">add a datepicker</button>
Here's the JS:
$('#cmd').click(function() {
var new_datepicker = $('<input type="text">').datepicker();
$('#content').append('<br>a datepicker ').append(new_datepicker);
});
here's a working demo
The difference between a tuple and a class is that a tuple has no property names. This is almost never a good thing, and I would only use a tuple when the arguments are fairly meaningless like in an abstract math formula Eg. abstract calculus over 5,6,7 dimensions might take a tuple for the coordinates.
bitvise tunnelier works really well
Add the active: false
option (documentation)..
$("#accordion").accordion({ header: "h3", collapsible: true, active: false });
The correct way to do this is to use show
and hide
:
$('#id').hide();
$('#id').show();
An alternate way is to use the jQuery css method:
$("#id").css("display", "none");
$("#id").css("display", "block");
Try shFlags -- Advanced command-line flag library for Unix shell scripts.
http://code.google.com/p/shflags/
It is very good and very flexible.
FLAG TYPES: This is a list of the DEFINE_*'s that you can do. All flags take a name, default value, help-string, and optional 'short' name (one-letter name). Some flags have other arguments, which are described with the flag.
DEFINE_string: takes any input, and intreprets it as a string.
DEFINE_boolean: typically does not take any argument: say --myflag to set FLAGS_myflag to true, or --nomyflag to set FLAGS_myflag to false. Alternately, you can say --myflag=true or --myflag=t or --myflag=0 or --myflag=false or --myflag=f or --myflag=1 Passing an option has the same affect as passing the option once.
DEFINE_float: takes an input and intreprets it as a floating point number. As shell does not support floats per-se, the input is merely validated as being a valid floating point value.
DEFINE_integer: takes an input and intreprets it as an integer.
SPECIAL FLAGS: There are a few flags that have special meaning: --help (or -?) prints a list of all the flags in a human-readable fashion --flagfile=foo read flags from foo. (not implemented yet) -- as in getopt(), terminates flag-processing
EXAMPLE USAGE:
-- begin hello.sh --
! /bin/sh
. ./shflags
DEFINE_string name 'world' "somebody's name" n
FLAGS "$@" || exit $?
eval set -- "${FLAGS_ARGV}"
echo "Hello, ${FLAGS_name}."
-- end hello.sh --
$ ./hello.sh -n Kate
Hello, Kate.
Note: I took this text from shflags documentation
You actually cannot draw Container Elements
But you can use a "foreignObject" with a "SVG" inside it to simulate what you need.
<svg width="640" height="480" xmlns="http://www.w3.org/2000/svg">
<foreignObject id="G" width="300" height="200">
<svg>
<rect fill="blue" stroke-width="2" height="112" width="84" y="55" x="55" stroke-linecap="null" stroke-linejoin="null" stroke-dasharray="null" stroke="#000000"/>
<ellipse fill="#FF0000" stroke="#000000" stroke-width="5" stroke-dasharray="null" stroke-linejoin="null" stroke-linecap="null" cx="155" cy="65" id="svg_7" rx="64" ry="56"/>
</svg>
<style>
#G {
background: #cff; border: 1px dashed black;
}
#G:hover {
background: #acc; border: 1px solid black;
}
</style>
</foreignObject>
</svg>
Typically, software will run in different environments:
development
testing
staging
production
The dependencies which are declared in the require
section of composer.json
are typically dependencies which are required for running an application or a package in
staging
production
environments, whereas the dependencies declared in the require-dev
section are typically dependencies which are required in
developing
testing
environments.
For example, in addition to the packages used for actually running an application, packages might be needed for developing the software, such as:
friendsofphp/php-cs-fixer
(to detect and fix coding style issues)squizlabs/php_codesniffer
(to detect and fix coding style issues)phpunit/phpunit
(to drive the development using tests)Now, in development
and testing
environments, you would typically run
$ composer install
to install both production
and development
dependencies.
However, in staging
and production
environments, you only want to install dependencies which are required for running the application, and as part of the deployment process, you would typically run
$ composer install --no-dev
to install only production
dependencies.
In other words, the sections
require
require-dev
indicate to composer
which packages should be installed when you run
$ composer install
or
$ composer install --no-dev
That is all.
Note Development dependencies of packages your application or package depend on will never be installed
For reference, see:
You'll need to learn how to use sed http://unixhelp.ed.ac.uk/CGI/man-cgi?sed
And also to use for so you can loop through your file entries http://www.cyberciti.biz/faq/bash-for-loop/
Your command will look something like this, I don't have a term beside me so I can't check
for i in `dir` do mv $i `echo $i | sed '/orig/new/g'`
We can use stream with anyMatch and contains of Java 8
public class Test2 {
public static void main(String[] args) {
String a = "Gina Gini Protijayi Soudipta";
String b = "Gini";
System.out.println(WordPresentOrNot(a, b));
}// main
private static boolean WordPresentOrNot(String a, String b) {
//contains is case sensitive. That's why change it to upper or lower case. Then check
// Here we are using stream with anyMatch
boolean match = Arrays.stream(a.toLowerCase().split(" ")).anyMatch(b.toLowerCase()::contains);
return match;
}
}
The format is %lu
.
Please check about the various other datatypes and their usage in printf here
db.runCommand( { "connPoolStats" : 1 } )
{
"numClientConnections" : 0,
"numAScopedConnections" : 0,
"totalInUse" : 0,
"totalAvailable" : 0,
"totalCreated" : 0,
"hosts" : {
},
"replicaSets" : {
},
"ok" : 1
}
These are all good answers. I would just like to add an execution example when passing objects by value vs by reference:
#include <iostream>
using namespace std;
// Base class
class A {
public:
A() {}
A(const A& a) {
cout << "'A' copy constructor" << endl;
}
virtual void run() const { cout << "I am an 'A'" << endl; }
};
// Derived class
class B: public A {
public:
B():A() {}
B(const B& a):A(a) {
cout << "'B' copy constructor" << endl;
}
virtual void run() const { cout << "I am a 'B'" << endl; }
};
void g(const A & a) {
a.run();
}
void h(const A a) {
a.run();
}
int main() {
cout << "Call by reference" << endl;
g(B());
cout << endl << "Call by copy" << endl;
h(B());
}
The output is:
Call by reference
I am a 'B'
Call by copy
'A' copy constructor
I am an 'A'
Travis-ci and Jenkins, while both are tools for continuous integration are very different.
Travis is a hosted service (free for open source) while you have to host, install and configure Jenkins.
Travis does not have jobs as in Jenkins. The commands to run to test the code are taken from a file named .travis.yml
which sits along your project code. This makes it easy to have different test code per branch since each branch can have its own version of the .travis.yml file.
You can have a similar feature with Jenkins if you use one of the following plugins:
.jervis.yml
file found at the root of project code. If .jervis.yml
does not exist, it will fall back to using .travis.yml
file instead.There are other hosted services you might also consider for continuous integration (non exhaustive list):
You might want to stay with Jenkins because you are familiar with it or don't want to depend on 3rd party for your continuous integration system. Else I would drop Jenkins and go with one of the free hosted CI services as they save you a lot of trouble (host, install, configure, prepare jobs)
Depending on where your code repository is hosted I would make the following choices:
To setup Travis-CI on a github project, all you have to do is:
The features you get are:
You can use the 'link' function, also known as postLink, which runs after the template is put in.
app.directive('myDirective', function() {
return {
link: function(scope, elm, attrs) { /*I run after template is put in */ },
template: '<b>Hello</b>'
}
});
Give this a read if you plan on making directives, it's a big help: http://docs.angularjs.org/guide/directive
I had this exact problem today and the problem was that the version I was trying to release:perform was already in the Nexus repo.
In my case this was likely due to a network disconnect during an earlier invocation of release:perform. Even though I lost my connection, it appears the release succeeded.
I had a similar problem. GET requests worked and their (empty) request bodies got written to the the log file. POST requests failed with a 404. Experimenting a bit, I found that all POST requests were failing. I found a forum posting asking about POST requests and the solution there worked for me. That solution? Add a proxy_header
line right before the proxy_pass
line, exactly like the one in the example below.
server {
listen 192.168.0.1:45080;
server_name foo.example.org;
access_log /path/to/log/nginx/post_bodies.log post_bodies;
location / {
### add the following proxy_header line to get POSTs to work
proxy_set_header Host $http_host;
proxy_pass http://10.1.2.3;
}
}
(This is with nginx 1.2.1 for what it is worth.)
I modified the top answer in this posting.. and recently created this script which will loop through all files in a given directory (searchdir) and the sub-directories under it... and prints filename, rootdir, modified/creation date, and size.
Hope this helps someone... and they can walk the directory and get fileinfo.
import time
import fnmatch
import os
def fileinfo(file):
filename = os.path.basename(file)
rootdir = os.path.dirname(file)
lastmod = time.ctime(os.path.getmtime(file))
creation = time.ctime(os.path.getctime(file))
filesize = os.path.getsize(file)
print "%s**\t%s\t%s\t%s\t%s" % (rootdir, filename, lastmod, creation, filesize)
searchdir = r'D:\Your\Directory\Root'
matches = []
for root, dirnames, filenames in os.walk(searchdir):
## for filename in fnmatch.filter(filenames, '*.c'):
for filename in filenames:
## matches.append(os.path.join(root, filename))
##print matches
fileinfo(os.path.join(root, filename))
when you pushing code to another branch just follow the below git command. Remember demo is my other branch name you can replace with your branch name.
git push origin master:demo
To check whether the input file is empty or not
by using the file length property, index
should be specified like the following:
var vidFileLength = $("#videoUploadFile")[0].files.length;
if(vidFileLength === 0){
alert("No file selected.");
}
You can only use column aliases in GROUP BY, ORDER BY, or HAVING clauses.
Standard SQL doesn't allow you to refer to a column alias in a WHERE clause. This restriction is imposed because when the WHERE code is executed, the column value may not yet be determined.
Copied from MySQL documentation
As pointed in the comments, using HAVING instead may do the work. Make sure to give a read at this question too: WHERE vs HAVING.
ALTER TABLE [dbo].[TableName]
ALTER COLUMN ColumnName VARCHAR(Max) NULL
I had this same problem on Window's and came across this solution. So if someone comes across this problem in Windows the solution for me was to increase the pagefile size, as it was a Memory overcommitment problem for me too.
Windows 8
Windows 10
Note: I did not have the enough memory on my system for the ~282GB in this example but for my particular case this worked.
EDIT
From here the suggested recommendations for page file size:
There is a formula for calculating the correct pagefile size. Initial size is one and a half (1.5) x the amount of total system memory. Maximum size is three (3) x the initial size. So let's say you have 4 GB (1 GB = 1,024 MB x 4 = 4,096 MB) of memory. The initial size would be 1.5 x 4,096 = 6,144 MB and the maximum size would be 3 x 6,144 = 18,432 MB.
Some things to keep in mind from here:
However, this does not take into consideration other important factors and system settings that may be unique to your computer. Again, let Windows choose what to use instead of relying on some arbitrary formula that worked on a different computer.
Also:
Increasing page file size may help prevent instabilities and crashing in Windows. However, a hard drive read/write times are much slower than what they would be if the data were in your computer memory. Having a larger page file is going to add extra work for your hard drive, causing everything else to run slower. Page file size should only be increased when encountering out-of-memory errors, and only as a temporary fix. A better solution is to adding more memory to the computer.
You could fill the dependend cell (D2) by a User Defined Function (VBA Macro Function) that takes the value of the C2-Cell as input parameter, returning the current date as ouput.
Having C2 as input parameter for the UDF in D2 tells Excel that it needs to reevaluate D2 everytime C2 changes (that is if auto-calculation of formulas is turned on for the workbook).
EDIT:
Here is some code:
For the UDF:
Public Function UDF_Date(ByVal data) As Date
UDF_Date = Now()
End Function
As Formula in D2:
=UDF_Date(C2)
You will have to give the D2-Cell a Date-Time Format, or it will show a numeric representation of the date-value.
And you can expand the formula over the desired range by draging it if you keep the C2 reference in the D2-formula relative.
Note: This still might not be the ideal solution because every time Excel recalculates the workbook the date in D2 will be reset to the current value. To make D2 only reflect the last time C2 was changed there would have to be some kind of tracking of the past value(s) of C2. This could for example be implemented in the UDF by providing also the address alonside the value of the input parameter, storing the input parameters in a hidden sheet, and comparing them with the previous values everytime the UDF gets called.
Addendum:
Here is a sample implementation of an UDF that tracks the changes of the cell values and returns the date-time when the last changes was detected. When using it, please be aware that:
The usage of the UDF is the same as described above.
The UDF works only for single cell input ranges.
The cell values are tracked by storing the last value of cell and the date-time when the change was detected in the document properties of the workbook. If the formula is used over large datasets the size of the file might increase considerably as for every cell that is tracked by the formula the storage requirements increase (last value of cell + date of last change.) Also, maybe Excel is not capable of handling very large amounts of document properties and the code might brake at a certain point.
If the name of a worksheet is changed all the tracking information of the therein contained cells is lost.
The code might brake for cell-values for which conversion to string is non-deterministic.
The code below is not tested and should be regarded only as proof of concept. Use it at your own risk.
Public Function UDF_Date(ByVal inData As Range) As Date
Dim wb As Workbook
Dim dProps As DocumentProperties
Dim pValue As DocumentProperty
Dim pDate As DocumentProperty
Dim sName As String
Dim sNameDate As String
Dim bDate As Boolean
Dim bValue As Boolean
Dim bChanged As Boolean
bDate = True
bValue = True
bChanged = False
Dim sVal As String
Dim dDate As Date
sName = inData.Address & "_" & inData.Worksheet.Name
sNameDate = sName & "_dat"
sVal = CStr(inData.Value)
dDate = Now()
Set wb = inData.Worksheet.Parent
Set dProps = wb.CustomDocumentProperties
On Error Resume Next
Set pValue = dProps.Item(sName)
If Err.Number <> 0 Then
bValue = False
Err.Clear
End If
On Error GoTo 0
If Not bValue Then
bChanged = True
Set pValue = dProps.Add(sName, False, msoPropertyTypeString, sVal)
Else
bChanged = pValue.Value <> sVal
If bChanged Then
pValue.Value = sVal
End If
End If
On Error Resume Next
Set pDate = dProps.Item(sNameDate)
If Err.Number <> 0 Then
bDate = False
Err.Clear
End If
On Error GoTo 0
If Not bDate Then
Set pDate = dProps.Add(sNameDate, False, msoPropertyTypeDate, dDate)
End If
If bChanged Then
pDate.Value = dDate
Else
dDate = pDate.Value
End If
UDF_Date = dDate
End Function
Make the insertion of the date conditional upon the range.
This has an advantage of not changing the dates unless the content of the cell is changed, and it is in the range C2:C2, even if the sheet is closed and saved, it doesn't recalculate unless the adjacent cell changes.
Adapted from this tip and @Paul S answer
Private Sub Worksheet_Change(ByVal Target As Range)
Dim R1 As Range
Dim R2 As Range
Dim InRange As Boolean
Set R1 = Range(Target.Address)
Set R2 = Range("C2:C20")
Set InterSectRange = Application.Intersect(R1, R2)
InRange = Not InterSectRange Is Nothing
Set InterSectRange = Nothing
If InRange = True Then
R1.Offset(0, 1).Value = Now()
End If
Set R1 = Nothing
Set R2 = Nothing
End Sub
Try:
h1 {
margin-top: 0;
}
You're seeing the effects of margin collapsing.
If you want to do this without a bunch of server-side processing within the page, it might be a feasible idea to blow the text value into a hidden field (using PHP). Then you can use jQuery to process the hidden field value.
Whatever floats your boat :)
//Vehicle is a function. But by naming conventions
//(first letter is uppercase), it is also an object
//constructor function ("class").
function Vehicle(numWheels) {
this.numWheels = numWheels;
}
//We can create new instances and check their types.
myRoadster = new Vehicle(4);
alert(myRoadster instanceof Vehicle);
There's more than one way to do this obviously.
# This will find files recursively (you can limit it by using some 'find' parameters.
# see the man pages
# Final backslash required for exec example to work
find . -name '*.gz' -exec gunzip '{}' \;
# This will do it only in the current directory
for a in *.gz; do gunzip $a; done
I'm sure there's other ways as well, but this is probably the simplest.
And to remove it, just do a rm -rf *.gz
in the applicable directory
I've just put this in a playground and it works for me.
Updated for Swift 4.0
import UIKit
func heightForView(text:String, font:UIFont, width:CGFloat) -> CGFloat{
let label:UILabel = UILabel(frame: CGRectMake(0, 0, width, CGFloat.greatestFiniteMagnitude))
label.numberOfLines = 0
label.lineBreakMode = NSLineBreakMode.byWordWrapping
label.font = font
label.text = text
label.sizeToFit()
return label.frame.height
}
let font = UIFont(name: "Helvetica", size: 20.0)
var height = heightForView("This is just a load of text", font: font, width: 100.0)
Swift 3:
func heightForView(text:String, font:UIFont, width:CGFloat) -> CGFloat{
let label:UILabel = UILabel(frame: CGRect(x: 0, y: 0, width: width, height: CGFloat.greatestFiniteMagnitude))
label.numberOfLines = 0
label.lineBreakMode = NSLineBreakMode.byWordWrapping
label.font = font
label.text = text
label.sizeToFit()
return label.frame.height
}
You should always use "throw;" to rethrow the exceptions in .NET,
Refer this, http://weblogs.asp.net/bhouse/archive/2004/11/30/272297.aspx
Basically MSIL (CIL) has two instructions - "throw" and "rethrow":
Basically I can see the reason why "throw ex" overrides the stack trace.
Xml declaration is optional so your xml is well-formed without it. But it is recommended to use it so that wrong assumptions are not made by the parsers, specifically about the encoding used.
ORA-00907: missing right parenthesis
This is one of several generic error messages which indicate our code contains one or more syntax errors. Sometimes it may mean we literally have omitted a right bracket; that's easy enough to verify if we're using an editor which has a match bracket capability (most text editors aimed at coders do). But often it means the compiler has come across a keyword out of context. Or perhaps it's a misspelled word, a space instead of an underscore or a missing comma.
Unfortunately the possible reasons why our code won't compile is virtually infinite and the compiler just isn't clever enough to distinguish them. So it hurls a generic, slightly cryptic, message like ORA-00907: missing right parenthesis
and leaves it to us to spot the actual bloomer.
The posted script has several syntax errors. First I will discuss the error which triggers that ORA-0097 but you'll need to fix them all.
Foreign key constraints can be declared in line with the referencing column or at the table level after all the columns have been declared. These have different syntaxes; your scripts mix the two and that's why you get the ORA-00907.
In-line declaration doesn't have a comma and doesn't include the referencing column name.
CREATE TABLE historys_T (
history_record VARCHAR2 (8),
customer_id VARCHAR2 (8)
CONSTRAINT historys_T_FK FOREIGN KEY REFERENCES T_customers ON DELETE CASCADE,
order_id VARCHAR2 (10) NOT NULL,
CONSTRAINT fk_order_id_orders REFERENCES orders ON DELETE CASCADE)
Table level constraints are a separate component, and so do have a comma and do mention the referencing column.
CREATE TABLE historys_T (
history_record VARCHAR2 (8),
customer_id VARCHAR2 (8),
order_id VARCHAR2 (10) NOT NULL,
CONSTRAINT historys_T_FK FOREIGN KEY (customer_id) REFERENCES T_customers ON DELETE CASCADE,
CONSTRAINT fk_order_id_orders FOREIGN KEY (order_id) REFERENCES orders ON DELETE CASCADE)
Here is a list of other syntax errors:
HISTORYS_T
before you have created the referenced ORDERS
table.LIBRARY_T
and FORMAT_T
). DATE DEFAULT sysdate
.Looking at our own code with a cool eye is a skill we all need to gain to be successful as developers. It really helps to be familiar with Oracle's documentation. A side-by-side comparison of your code and the examples in the SQL Reference would have helped you resolved these syntax errors in considerably less than two days. Find it here (11g) and here (12c).
As well as syntax errors, your scripts contain design mistakes. These are not failures, but bad practice which should not become habits.
HISTORY_T
has constraints called historys_T_FK
and fk_order_id_orders
, neither of which is helpful. A useful convention is <child_table>_<parent_table>_fk
. So history_customer_fk
and history_order_fk
respectively.LIBRARY_T
and FORMATS
. You could do this by creating the constraints in separate statement but don't: you will have problems when inserting rows and even worse problems with deletions. You should reconsider your data model and find a way to model the relationship between the two tables so that one is the parent and the other the child. Or perhaps you need a different kind of relationship, such as an intersection table.LIBRARY_T
is ugly. Try to find a more expressive name which doesn't require a needless suffix to avoid a keyword clash.T_CUSTOMERS
is even uglier, being both inconsistent with your other tables and completely unnecessary, as customers
is not a keyword.Naming things is hard. You wouldn't believe the wrangles I've had about table names over the years. The most important thing is consistency. If I look at a data dictionary and see tables called T_CUSTOMERS
and LIBRARY_T
my first response would be confusion. Why are these tables named with different conventions? What conceptual difference does this express? So, please, decide on a naming convention and stick to. Make your table names either all singular or all plural. Avoid prefixes and suffixes as much as possible; we already know it's a table, we don't need a T_
or a _TAB
.
Most database servers have a COALESCE function, which will return the first argument that is non-null, so the following should do what you want:
SELECT COALESCE(SUM(Price),0) AS TotalPrice
FROM Inventory
WHERE (DateAdded BETWEEN @StartDate AND @EndDate)
Since there seems to be a lot of discussion about
COALESCE/ISNULL will still return NULL if no rows match, try this query you can copy-and-paste into SQL Server directly as-is:
SELECT coalesce(SUM(column_id),0) AS TotalPrice
FROM sys.columns
WHERE (object_id BETWEEN -1 AND -2)
Note that the where clause excludes all the rows from sys.columns from consideration, but the 'sum' operator still results in a single row being returned that is null, which coalesce fixes to be a single row with a 0.
Just as we refer to scrolling
class
$( ".scrolling" ).each( function(){
var img = $( "img", this );
$(this).width( img.width() * img.length * 1.2 )
})
Database is like container of data with schema, and schemas is layout of the tables there data types, relations and stuff
Your setters are strange, which is why you may be seeing a problem.
First, consider whether you even need these setters - if so, they should take a List<string>
, not just a string
:
set
{
_subHead = value;
}
These lines:
newSec.subHead.Add("test string");
Are calling the getter and then call Add
on the returned List<string>
- the setter is not invoked.
You probably want to make a range query, for example, all items created after a given date:
db.gpsdatas.find({"createdAt" : { $gte : new ISODate("2012-01-12T20:15:31Z") }});
I'm using $gte
(greater than or equals), because this is often used for date-only queries, where the time component is 00:00:00.
If you really want to find a date that equals another date, the syntax would be
db.gpsdatas.find({"createdAt" : new ISODate("2012-01-12T20:15:31Z") });
You can do it using jQuery. Example:
<script src="https://code.jquery.com/jquery-1.11.2.min.js"></script>
<script>
$.ajax({
url : "next.php",
type: "POST",
data : "name=Denniss",
success: function(data)
{
//data - response from server
$('#response_div').html(data);
}
});
</script>
What is interrupt ?
An interrupt is an indication to a thread that it should stop what it is doing and do something else. It's up to the programmer to decide exactly how a thread responds to an interrupt, but it is very common for the thread to terminate.
How is it implemented ?
The interrupt mechanism is implemented using an internal flag known as the interrupt status. Invoking Thread.interrupt sets this flag. When a thread checks for an interrupt by invoking the static method Thread.interrupted, interrupt status is cleared. The non-static Thread.isInterrupted, which is used by one thread to query the interrupt status of another, does not change the interrupt status flag.
Quote from Thread.interrupt()
API:
Interrupts this thread. First the checkAccess method of this thread is invoked, which may cause a SecurityException to be thrown.
If this thread is blocked in an invocation of the wait(), wait(long), or wait(long, int) methods of the Object class, or of the join(), join(long), join(long, int), sleep(long), or sleep(long, int), methods of this class, then its interrupt status will be cleared and it will receive an InterruptedException.
If this thread is blocked in an I/O operation upon an interruptible channel then the channel will be closed, the thread's interrupt status will be set, and the thread will receive a ClosedByInterruptException.
If this thread is blocked in a Selector then the thread's interrupt status will be set and it will return immediately from the selection operation, possibly with a non-zero value, just as if the selector's wakeup method were invoked.
If none of the previous conditions hold then this thread's interrupt status will be set.
Check this out for complete understanding about same :
http://download.oracle.com/javase/tutorial/essential/concurrency/interrupt.html
In case you want to be on the safe side, I recommend to use getopts.
Here is a small example:
while getopts "x:c" opt; do
case $opt in
c)
echo "-$opt was triggered, deploy to ci account" >&2
DEPLOY_CI_ACCT="true"
;;
x)
echo "-$opt was triggered, Parameter: $OPTARG" >&2
CMD_TO_EXEC=${OPTARG}
;;
\?)
echo "Invalid option: -$OPTARG" >&2
Usage
exit 1
;;
:)
echo "Option -$OPTARG requires an argument." >&2
Usage
exit 1
;;
esac
done
see more details here for example http://wiki.bash-hackers.org/howto/getopts_tutorial
More simply you can utilize DropBox for this. The steps basically remain the same. You can do the following-:
1) upload your .ipa to dropBox, Share the link for this .ipa
2) Paste the shared link for .ipa in your manifest.plist file , Upload manifest file in DropBox again share the link for this .plist file
3)paste the link for this Plist in your index.html file with a suitable tag.
Share this index.html file with anybody who can tap on the URL and download. or you can directly hit the URL instead.
Use this:
while IFS= read -r file ; do rm -- "$file" ; done < delete.list
If you need glob expansion you can omit quoting $file
:
IFS=""
while read -r file ; do rm -- $file ; done < delete.list
But be warned that file names can contain "problematic" content and I would use the unquoted version. Imagine this pattern in the file
*
*/*
*/*/*
This would delete quite a lot from the current directory! I would encourage you to prepare the delete list in a way that glob patterns aren't required anymore, and then use quoting like in my first example.
The using statement obtains one or more resources, executes a statement, and then disposes of the resource.
Here is an example:
html_code +="<td>" +
"<select name='[row"+count+"]' data-placeholder='Choose One...' class='chosen-select form-control' tabindex='2'>"+
"<option selected='selected' disabled='disabled' value=''>Select Exam Name</option>"+
"<?php foreach($NM_EXAM as $ky=>$row) {
echo '<option value='."$row->EXAM_ID". '>' . $row->EXAM_NAME . '</option>';
} ?>"+
"</select>"+
"</td>";
Or
echo '<option value=\"'.$row->EXAM_ID. '\">' . $row->EXAM_NAME . '</option>';
Return values are generally not used to "return" a result but to return success (0) or an error number (1-65K). The above all seem to indicate that sp_executesql does not return a value, which is not correct. sp_executesql will return 0 for success and any other number for failure.
In the below, @i will return 2727
DECLARE @s NVARCHAR(500)
DECLARE @i INT;
SET @s = 'USE [Blah]; UPDATE STATISTICS [dbo].[TableName] [NonExistantStatisticsName];';
EXEC @i = sys.sp_executesql @s
SELECT @i AS 'Blah'
SSMS will show this Msg 2727, Level 11, State 1, Line 1 Cannot find index 'NonExistantStaticsName'.
Let's start with this small df:
import pandas as pd
import time as tm
import numpy as np
n=10
a=np.arange(0,n**2)
df=pd.DataFrame(a.reshape(n,n))
We'll so have
df
Out[25]:
0 1 2 3 4 5 6 7 8 9
0 0 1 2 3 4 5 6 7 8 9
1 10 11 12 13 14 15 16 17 18 19
2 20 21 22 23 24 25 26 27 28 29
3 30 31 32 33 34 35 36 37 38 39
4 40 41 42 43 44 45 46 47 48 49
5 50 51 52 53 54 55 56 57 58 59
6 60 61 62 63 64 65 66 67 68 69
7 70 71 72 73 74 75 76 77 78 79
8 80 81 82 83 84 85 86 87 88 89
9 90 91 92 93 94 95 96 97 98 99
With this we have:
df.iloc[3,3]
Out[33]: 33
df.iat[3,3]
Out[34]: 33
df.iloc[:3,:3]
Out[35]:
0 1 2 3
0 0 1 2 3
1 10 11 12 13
2 20 21 22 23
3 30 31 32 33
df.iat[:3,:3]
Traceback (most recent call last):
... omissis ...
ValueError: At based indexing on an integer index can only have integer indexers
Thus we cannot use .iat for subset, where we must use .iloc only.
But let's try both to select from a larger df and let's check the speed ...
# -*- coding: utf-8 -*-
"""
Created on Wed Feb 7 09:58:39 2018
@author: Fabio Pomi
"""
import pandas as pd
import time as tm
import numpy as np
n=1000
a=np.arange(0,n**2)
df=pd.DataFrame(a.reshape(n,n))
t1=tm.time()
for j in df.index:
for i in df.columns:
a=df.iloc[j,i]
t2=tm.time()
for j in df.index:
for i in df.columns:
a=df.iat[j,i]
t3=tm.time()
loc=t2-t1
at=t3-t2
prc = loc/at *100
print('\nloc:%f at:%f prc:%f' %(loc,at,prc))
loc:10.485600 at:7.395423 prc:141.784987
So with .loc we can manage subsets and with .at only a single scalar, but .at is faster than .loc
:-)
This will do it recursively for you:
find /path/to/base/dir/* -type d -ctime +10 -exec rm -rf {} \;
Explanation:
find
: the unix command for finding files / directories / links etc./path/to/base/dir
: the directory to start your search in.-type d
: only find directories-ctime +10
: only consider the ones with modification time older than 10 days-exec ... \;
: for each such result found, do the following command in ...
rm -rf {}
: recursively force remove the directory; the {}
part is where the find result gets substituted into from the previous part.Alternatively, use:
find /path/to/base/dir/* -type d -ctime +10 | xargs rm -rf
Which is a bit more efficient, because it amounts to:
rm -rf dir1 dir2 dir3 ...
as opposed to:
rm -rf dir1; rm -rf dir2; rm -rf dir3; ...
as in the -exec
method.
With modern versions of find
, you can replace the ;
with +
and it will do the equivalent of the xargs
call for you, passing as many files as will fit on each exec system call:
find . -type d -ctime +10 -exec rm -rf {} +
This should work:
from numpy import *
a = array([[1, 2, 3], [0, 3, NaN]])
where_are_NaNs = isnan(a)
a[where_are_NaNs] = 0
In the above case where_are_NaNs is:
In [12]: where_are_NaNs
Out[12]:
array([[False, False, False],
[False, False, True]], dtype=bool)
You can style (albeit with some constraints) the actual items themselves with the option
selector:
select, option { width: __; }
This way you are not only constraining the drop-down, but also all of its elements.
I've had this problem myself and I've found the great wikipedia page on the subject (in "Common rotations" paragraph:
https://en.wikipedia.org/wiki/Rotation_matrix#Ambiguities
Then I wrote the following code, super verbose in order to have a clear understanding of what is going on.
I hope that you'll find it useful to dig more in the very beautiful and clever one-liner you've posted.
To quickly test it you can copy / paste it here:
http://www.codeskulptor.org/
triangle = [[0,0],[5,0],[5,2]]
coordinates_a = triangle[0]
coordinates_b = triangle[1]
coordinates_c = triangle[2]
def rotate90ccw(coordinates):
print "Start coordinates:"
print coordinates
old_x = coordinates[0]
old_y = coordinates[1]
# Here we apply the matrix coming from Wikipedia
# for 90 ccw it looks like:
# 0,-1
# 1,0
# What does this mean?
#
# Basically this is how the calculation of the new_x and new_y is happening:
# new_x = (0)(old_x)+(-1)(old_y)
# new_y = (1)(old_x)+(0)(old_y)
#
# If you check the lonely numbers between parenthesis the Wikipedia matrix's numbers
# finally start making sense.
# All the rest is standard formula, the same behaviour will apply to other rotations, just
# remember to use the other rotation matrix values available on Wiki for 180ccw and 170ccw
new_x = -old_y
new_y = old_x
print "End coordinates:"
print [new_x, new_y]
def rotate180ccw(coordinates):
print "Start coordinates:"
print coordinates
old_x = coordinates[0]
old_y = coordinates[1]
new_x = -old_x
new_y = -old_y
print "End coordinates:"
print [new_x, new_y]
def rotate270ccw(coordinates):
print "Start coordinates:"
print coordinates
old_x = coordinates[0]
old_y = coordinates[1]
new_x = -old_x
new_y = -old_y
print "End coordinates:"
print [new_x, new_y]
print "Let's rotate point A 90 degrees ccw:"
rotate90ccw(coordinates_a)
print "Let's rotate point B 90 degrees ccw:"
rotate90ccw(coordinates_b)
print "Let's rotate point C 90 degrees ccw:"
rotate90ccw(coordinates_c)
print "=== === === === === === === === === "
print "Let's rotate point A 180 degrees ccw:"
rotate180ccw(coordinates_a)
print "Let's rotate point B 180 degrees ccw:"
rotate180ccw(coordinates_b)
print "Let's rotate point C 180 degrees ccw:"
rotate180ccw(coordinates_c)
print "=== === === === === === === === === "
print "Let's rotate point A 270 degrees ccw:"
rotate270ccw(coordinates_a)
print "Let's rotate point B 270 degrees ccw:"
rotate270ccw(coordinates_b)
print "Let's rotate point C 270 degrees ccw:"
rotate270ccw(coordinates_c)
print "=== === === === === === === === === "
On Ubuntu systems, use the following locations:
System-wide persistent variables in the format of JAVA_PATH=/usr/local/java
store in
/etc/environment
System-wide persistent variables that reference variables such as
export PATH="$JAVA_PATH:$PATH"
store in
/etc/.bashrc
User specific persistent variables in the format of PATH DEFAULT=/usr/bin:usr/local/bin
store in
~/.pam_environment
For more details on #2, check this Ask Ubuntu answer. NOTE: #3 is the Ubuntu recommendation but may have security concerns in the real world.
I think no one actually has answered to the first question:
Why did they create those variables?
Those variables aren't strictly necessary. It's true. You can perfectly do something like this:
MONTH_CHOICES = (
("JANUARY", "January"),
("FEBRUARY", "February"),
("MARCH", "March"),
# ....
("DECEMBER", "December"),
)
month = models.CharField(max_length=9,
choices=MONTH_CHOICES,
default="JANUARY")
Why using variables is better? Error prevention and logic separation.
JAN = "JANUARY"
FEB = "FEBRUARY"
MAR = "MAR"
# (...)
MONTH_CHOICES = (
(JAN, "January"),
(FEB, "February"),
(MAR, "March"),
# ....
(DEC, "December"),
)
Now, imagine you have a view where you create a new Model instance. Instead of doing this:
new_instance = MyModel(month='JANUARY')
You'll do this:
new_instance = MyModel(month=MyModel.JAN)
In the first option you are hardcoding the value. If there is a set of values you can input, you should limit those options when coding. Also, if you eventually need to change the code at the Model layer, now you don't need to make any change in the Views layer.
Consider the below situation
public class Person{
public String Name{get; set;}
public String Email {get; set;}
public virtual Employer employer {get; set;}
}
public List<EF.Person> GetPerson(){
using(EF.DbEntities db = new EF.DbEntities()){
return db.Person.ToList();
}
}
Now after this method is called, you cannot lazy load the Employer
entity anymore. Why? because the db
object is disposed. So you have to do Person.Include(x=> x.employer)
to force that to be loaded.
window.open ("http://www.javascript-coder.com",
"mywindow","menubar=1,resizable=1,width=350,height=250");
from
http://www.javascript-coder.com/window-popup/javascript-window-open.phtml
:]
Turning Hardware Acceleration OFF seems to be the setting that affects popups & dialogs.
Chrome was continually hiding Dialog Windows when I needed to respond Yes or No to things, also when I needed to Rename folders in my bookmarks panel. After weeks of doing this. I disabled all the Chrome helpers in Settings, Also In windows 10 I switched Window Snapping off. It has done something to put the popups and dialogs back in the Viewport.
When this bug is happening, I was able to shut a tab by first pressing Enter before clicking the tab close X button. The browser had an alert box, hidden which needed a response from the user.
Switching Hardware Accleration Off and back On, Killing the Chrome process and switching all the other Helpers Off and back has fixed it for me... It must be in chrome itself because Ive just gone into a Chrome window in the Mac and it has now stopped the problem, without any intervention. Im guessing flicking the chrome settings on/off/on has caused it to reposition the dialogs. I cant get the browser to repeat the fault now...
I work with asp.net core 2.2 and jquery and have to submit a complex object ('main class') from a view to a controller with simple data fields and some array's.
As soon as I have added the array in the c# 'main class' definition (see below) and submitted the (correct filled) array over ajax (post), the whole object was null in the controller.
First, I thought, the missing "traditional: true," to my ajax call was the reason, but this is not the case.
In my case the reason was the definition in the c# 'main class'.
In the 'main class', I had:
public List<EreignisTagNeu> oEreignistageNeu { get; set; }
and EreignisTagNeu was defined as:
public class EreignisTagNeu
{
public int iHME_Key { get; set; }
}
I had to change the definition in the 'main class' to:
public List<int> oEreignistageNeu { get; set; }
Now it works.
So... for me it seems as asp.net core has a problem (with post), if the list for an array is not defined completely in the 'main class'.
Note:
In my case this works with or without "traditional: true," to the ajax call
Use With in the code.
Try this way :
''''Way 1
currentdir=Left(WScript.ScriptFullName,InStrRev(WScript.ScriptFullName,"\"))
''''Way 2
With CreateObject("WScript.Shell")
CurrentPath=.CurrentDirectory
End With
''''Way 3
With WSH
CD=Replace(.ScriptFullName,.ScriptName,"")
End With
Current thinking seems to be to "tolerate" nulls, that is, to allow them in general, although some operations are less tolerant and may end up throwing NPE. See the discussion of nulls on the Lambda Libraries expert group mailing list, specifically this message. Consensus around option #3 subsequently emerged (with a notable objection from Doug Lea). So yes, the OP's concern about pipelines blowing up with NPE is valid.
It's not for nothing that Tony Hoare referred to nulls as the "Billion Dollar Mistake." Dealing with nulls is a real pain. Even with classic collections (without considering lambdas or streams) nulls are problematic. As fge mentioned in a comment, some collections allow nulls and others do not. With collections that allow nulls, this introduces ambiguities into the API. For example, with Map.get(), a null return indicates either that the key is present and its value is null, or that the key is absent. One has to do extra work to disambiguate these cases.
The usual use for null is to denote the absence of a value. The approach for dealing with this proposed for Java SE 8 is to introduce a new java.util.Optional
type, which encapsulates the presence/absence of a value, along with behaviors of supplying a default value, or throwing an exception, or calling a function, etc. if the value is absent. Optional
is used only by new APIs, though, everything else in the system still has to put up with the possibility of nulls.
My advice is to avoid actual null references to the greatest extent possible. It's hard to see from the example given how there could be a "null" Otter. But if one were necessary, the OP's suggestions of filtering out null values, or mapping them to a sentinel object (the Null Object Pattern) are fine approaches.
If you set CURLOPT_RETURNTRANSFER
to true
or 1
then the return value from curl_exec
will be the actual result from the successful operation. In other words it will not return TRUE
on success. Although it will return FALSE
on failure.
As described in the Return Values section of curl-exec
PHP manual page: http://php.net/manual/function.curl-exec.php
You should enable the CURLOPT_FOLLOWLOCATION
option for redirects but this would be a problem if your server is in safe_mode
and/or open_basedir
is in effect which can cause issues with curl as well.
/[A-Z]/ig
/[^A-Z]/ig
/[0-9]/g
or /\d+/g
/[^0-9]/g
or /\D+/g
/[^A-Z0-9]/ig
There are other possible patterns
The following snippet shows a way to ensure the awaited method completes before returning to the caller. HOWEVER, I wouldn't say it's good practice. Please edit my answer with explanations if you think otherwise.
public async Task AnAsyncMethodThatCompletes()
{
await SomeAsyncMethod();
DoSomeMoreStuff();
await Task.Factory.StartNew(() => { }); // <-- This line here, at the end
}
await AnAsyncMethodThatCompletes();
Console.WriteLine("AnAsyncMethodThatCompletes() completed.")
You can connect two iPhones and transfer data via Bluetooth using either the high-level GameKit framework or the lower-level (but still easy to work with) Bonjour discovery mechanisms. Bonjour also works transparently between Bluetooth and WiFi on the iPhone under 3.0, so it's a good choice if you would like to support iPhone-to-iPhone data transfers on those two types of networks.
For more information, you can also look at the responses to these questions:
I'd also consider using a plain old <rect>
which provides the rx
and ry
attributes
MDN SVG docs <- note the second drawn rect element
Neo4j cannot delete nodes that have a relation. You have to delete the relations before you can delete the nodes.
But, it is simple way to delete "ALL" nodes and "ALL" relationships with a simple chyper. This is the code:
MATCH (n) DETACH DELETE n
--> DETACH DELETE will remove all of the nodes and relations by Match
See below link : http://www.asciitable.com/
public static char randomSeriesForThreeCharacter() {
Random r = new Random();
char random_3_Char = (char) (48 + r.nextInt(47));
return random_3_Char;
}
Now you can generate a character at one time of calling.
.service-small option {
font-size: 14px;
padding: 5px;
background: #5c5c5c;
}
I think it because you used .styled-select in start of the class code.
In case of WSS 3.0 recently I experienced same issue. It was because of column that was accessed from code was not present in the wss list.
You can use Postgres' SIMILAR TO
operator which supports alternations, i.e.
select * from table where lower(value) similar to '%(foo|bar|baz)%';
Not tested, but probably something like if(preg_match("/^[0-9,]+$/", $a)) $a = str_replace(...)
Do it the other way around:
$a = "1,435";
$b = str_replace( ',', '', $a );
if( is_numeric( $b ) ) {
$a = $b;
}
The easiest would be:
$var = intval(preg_replace('/[^\d.]/', '', $var));
or if you need float:
$var = floatval(preg_replace('/[^\d.]/', '', $var));
simple way to do this... here are the example
cd program files
cd poweriso
piso mount D:\<Filename.iso> <Virtual Drive>
Pause
this will mount the ISO image to the specific drive...use
The Python name resolution only knows the following kinds of scope:
print
, int
, or zip
,def
block, lambda
expression or comprehension.def
block, lambda
expression or comprehension,class
block.Notably, other constructs such as if
, for
, or with
statements do not have their own scope.
The scoping TLDR: The lookup of a name begins at the scope in which the name is used, then any enclosing scopes (excluding class scopes), to the module globals, and finally the builtins – the first match in this search order is used.
The assignment to a scope is by default to the current scope – the special forms nonlocal
and global
must be used to assign to a name from an outer scope.
Finally, comprehensions and generator expressions as well as :=
asignment expressions have one special rule when combined.
These different scopes build a hierarchy, with builtins then global always forming the base, and closures, locals and class scope being nested as lexically defined. That is, only the nesting in the source code matters, not for example the call stack.
print("builtins are available without definition")
some_global = "1" # global variables are at module scope
def outer_function():
some_closure = "3.1" # locals and closure are defined the same, at function scope
some_local = "3.2" # a variable becomes a closure if a nested scope uses it
class InnerClass:
some_classvar = "3.3" # class variables exist *only* at class scope
def nested_function(self):
some_local = "3.2" # locals can replace outer names
print(some_closure) # closures are always readable
return InnerClass
Even though class
creates a scope and may have nested classes, functions and comprehensions, the names of the class
scope are not visible to enclosed scopes. This creates the following hierarchy:
? builtins [print, ...]
??? globals [some_global]
??? outer_function [some_local, some_closure]
??? InnerClass [some_classvar]
??? inner_function [some_local]
Name resolution always starts at the current scope in which a name is accessed, then goes up the hierarchy until a match is found. For example, looking up some_local
inside outer_function
and inner_function
starts at the respective function - and immediately finds the some_local
defined in outer_function
and inner_function
, respectively. When a name is not local, it is fetched from the nearest enclosing scope that defines it – looking up some_closure
and print
inside inner_function
searches until outer_function
and builtins, respectively.
By default, a name belongs to any scope in which it is bound to a value. Binding the same name again in an inner scope creates a new variable with the same name - for example, some_local
exists separately in both outer_function
and inner_function
. As far as scoping is concerned, binding includes any statement that sets the value of a name – assignment statements, but also the iteration variable of a for
loop, or the name of a with
context manager. Notably, del
also counts as name binding.
When a name must refer to an outer variable and be bound in an inner scope, the name must be declared as not local. Separate declarations exists for the different kinds of enclosing scopes: nonlocal
always refers to the nearest closure, and global
always refers to a global name. Notably, nonlocal
never refers to a global name and global
ignores all closures of the same name. There is no declaration to refer to the builtin scope.
some_global = "1"
def outer_function():
some_closure = "3.2"
some_global = "this is ignored by a nested global declaration"
def inner_function():
global some_global # declare variable from global scope
nonlocal some_closure # declare variable from enclosing scope
message = " bound by an inner scope"
some_global = some_global + message
some_closure = some_closure + message
return inner_function
Of note is that function local and nonlocal
are resolved at compile time. A nonlocal
name must exist in some outer scope. In contrast, a global
name can be defined dynamically and may be added or removed from the global scope at any time.
The scoping rules of list, set and dict comprehensions and generator expressions are almost the same as for functions. Likewise, the scoping rules for assignment expressions are almost the same as for regular name binding.
The scope of comprehensions and generator expressions is of the same kind as function scope. All names bound in the scope, namely the iteration variables, are locals or closures to the comprehensions/generator and nested scopes. All names, including iterables, are resolved using name resolution as applicable inside functions.
some_global = "global"
def outer_function():
some_closure = "closure"
return [ # new function-like scope started by comprehension
comp_local # names resolved using regular name resolution
for comp_local # iteration targets are local
in "iterable"
if comp_local in some_global and comp_local in some_global
]
An :=
assignment expression works on the nearest function, class or global scope. Notably, if the target of an assignment expression has been declared nonlocal
or global
in the nearest scope, the assignment expression honors this like a regular assignment.
print(some_global := "global")
def outer_function():
print(some_closure := "closure")
However, an assignment expression inside a comprehension/generator works on the nearest enclosing scope of the comprehension/generator, not the scope of the comprehension/generator itself. When several comprehensions/generators are nested, the nearest function or global scope is used. Since the comprehension/generator scope can read closures and global variables, the assignment variable is readable in the comprehension as well. Assigning from a comprehension to a class scope is not valid.
print(some_global := "global")
def outer_function():
print(some_closure := "closure")
steps = [
# v write to variable in containing scope
(some_closure := some_closure + comp_local)
# ^ read from variable in containing scope
for comp_local in some_global
]
return some_closure, steps
While the iteration variable is local to the comprehension in which it is bound, the target of the assignment expression does not create a local variable and is read from the outer scope:
? builtins [print, ...]
??? globals [some_global]
??? outer_function [some_closure]
??? <listcomp> [comp_local]
I know it's an old post ... but it may be useful for someone ... in a "functional" way ...
import Data.List
safeIndex :: [a] -> Int -> Maybe a
safeIndex xs i
| (i> -1) && (length xs > i) = Just (xs!!i)
| otherwise = Nothing
try something like this
JFileChooser chooser = new JFileChooser();
chooser.setCurrentDirectory(new java.io.File("."));
chooser.setDialogTitle("select folder");
chooser.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
chooser.setAcceptAllFileFilterUsed(false);
The reason your attempt wasn't working, is because the two animations (fade-in and fade-out) were working against each other.
Right before an object became visible, it was still invisible and so the animation for fading-out would run. Then, the fraction of a second later when that same object had become visible, the fade-in animation would try to run, but the fade-out was still running. So they would work against each other and you would see nothing.
Eventually the object would become visible (most of the time), but it would take a while. And if you would scroll down by using the arrow-button at the button of the scrollbar, the animation would sort of work, because you would scroll using bigger increments, creating less scroll-events.
Enough explanation, the solution (JS, CSS, HTML):
$(window).on("load",function() {_x000D_
$(window).scroll(function() {_x000D_
var windowBottom = $(this).scrollTop() + $(this).innerHeight();_x000D_
$(".fade").each(function() {_x000D_
/* Check the location of each desired element */_x000D_
var objectBottom = $(this).offset().top + $(this).outerHeight();_x000D_
_x000D_
/* If the element is completely within bounds of the window, fade it in */_x000D_
if (objectBottom < windowBottom) { //object comes into view (scrolling down)_x000D_
if ($(this).css("opacity")==0) {$(this).fadeTo(500,1);}_x000D_
} else { //object goes out of view (scrolling up)_x000D_
if ($(this).css("opacity")==1) {$(this).fadeTo(500,0);}_x000D_
}_x000D_
});_x000D_
}).scroll(); //invoke scroll-handler on page-load_x000D_
});
_x000D_
.fade {_x000D_
margin: 50px;_x000D_
padding: 50px;_x000D_
background-color: lightgreen;_x000D_
opacity: 1;_x000D_
}
_x000D_
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script>_x000D_
_x000D_
<div>_x000D_
<div class="fade">Fade In 01</div>_x000D_
<div class="fade">Fade In 02</div>_x000D_
<div class="fade">Fade In 03</div>_x000D_
<div class="fade">Fade In 04</div>_x000D_
<div class="fade">Fade In 05</div>_x000D_
<div class="fade">Fade In 06</div>_x000D_
<div class="fade">Fade In 07</div>_x000D_
<div class="fade">Fade In 08</div>_x000D_
<div class="fade">Fade In 09</div>_x000D_
<div class="fade">Fade In 10</div>_x000D_
</div>
_x000D_
if ($(this).css("opacity")==0) {...}
. This makes sure the object is only faded in when the opacity
is 0
. Same goes for fading out. And this prevents the fade-in and fade-out from working against each other, because now there's ever only one of the two running at one time on an object..animate()
to .fadeTo()
. It's jQuery's specialized function for opacity, a lot shorter to write and probably lighter than animate..position()
to .offset()
. This always calculates relative to the body, whereas position is relative to the parent. For your case I believe offset is the way to go.$(window).height()
to $(window).innerHeight()
. The latter is more reliable in my experience.$(window).scroll();
. Now you can give all desired objects on the page the .fade
class, and objects that should be invisible at page-load, will be faded out immediately.#container
from both HTML and CSS, because (at least for this answer) it isn't necessary. (I thought maybe you needed the height:2000px
because you used .position()
instead of .offset()
, otherwise I don't know. Feel free of course to leave it in your code.)If you want opacity values other than 0
and 1
, use the following code:
$(window).on("load",function() {_x000D_
function fade(pageLoad) {_x000D_
var windowBottom = $(window).scrollTop() + $(window).innerHeight();_x000D_
var min = 0.3;_x000D_
var max = 0.7;_x000D_
var threshold = 0.01;_x000D_
_x000D_
$(".fade").each(function() {_x000D_
/* Check the location of each desired element */_x000D_
var objectBottom = $(this).offset().top + $(this).outerHeight();_x000D_
_x000D_
/* If the element is completely within bounds of the window, fade it in */_x000D_
if (objectBottom < windowBottom) { //object comes into view (scrolling down)_x000D_
if ($(this).css("opacity")<=min+threshold || pageLoad) {$(this).fadeTo(500,max);}_x000D_
} else { //object goes out of view (scrolling up)_x000D_
if ($(this).css("opacity")>=max-threshold || pageLoad) {$(this).fadeTo(500,min);}_x000D_
}_x000D_
});_x000D_
} fade(true); //fade elements on page-load_x000D_
$(window).scroll(function(){fade(false);}); //fade elements on scroll_x000D_
});
_x000D_
.fade {_x000D_
margin: 50px;_x000D_
padding: 50px;_x000D_
background-color: lightgreen;_x000D_
opacity: 1;_x000D_
}
_x000D_
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script>_x000D_
_x000D_
<div>_x000D_
<div class="fade">Fade In 01</div>_x000D_
<div class="fade">Fade In 02</div>_x000D_
<div class="fade">Fade In 03</div>_x000D_
<div class="fade">Fade In 04</div>_x000D_
<div class="fade">Fade In 05</div>_x000D_
<div class="fade">Fade In 06</div>_x000D_
<div class="fade">Fade In 07</div>_x000D_
<div class="fade">Fade In 08</div>_x000D_
<div class="fade">Fade In 09</div>_x000D_
<div class="fade">Fade In 10</div>_x000D_
</div>
_x000D_
threshold
and for min/max
at the start of the function. In the rest of the function these variables are referenced. This way, if you ever want to change the values again, you only have to do it in one place.|| pageLoad
to the if-clause. This was necessary to make sure all objects are faded to the correct opacity on page-load. pageLoad
is a boolean that is send along as an argument when fade()
is invoked.function fade() {...}
, in order to be able to send along the pageLoad
boolean when the scroll-handler is invoked.Explanation:
The reason the code in your fiddle didn't work, is because the actual opacity values are always a little off from the value you set it to. So if you set the opacity to 0.3
, the actual value (in this case) is 0.300000011920929
. That's just one of those little bugs you have to learn along the way by trail and error. That's why this if-clause won't work: if ($(this).css("opacity") == 0.3) {...}
.
I added a threshold, to take that difference into account: == 0.3
becomes <= 0.31
.
(I've set the threshold to 0.01
, this can be changed of course, just as long as the actual opacity will fall between the set value and this threshold.)
The operators are now changed from ==
to <=
and >=
.
If you want to fade the elements based on their visible percentage, use the following code:
$(window).on("load",function() {_x000D_
function fade(pageLoad) {_x000D_
var windowTop=$(window).scrollTop(), windowBottom=windowTop+$(window).innerHeight();_x000D_
var min=0.3, max=0.7, threshold=0.01;_x000D_
_x000D_
$(".fade").each(function() {_x000D_
/* Check the location of each desired element */_x000D_
var objectHeight=$(this).outerHeight(), objectTop=$(this).offset().top, objectBottom=$(this).offset().top+objectHeight;_x000D_
_x000D_
/* Fade element in/out based on its visible percentage */_x000D_
if (objectTop < windowTop) {_x000D_
if (objectBottom > windowTop) {$(this).fadeTo(0,min+((max-min)*((objectBottom-windowTop)/objectHeight)));}_x000D_
else if ($(this).css("opacity")>=min+threshold || pageLoad) {$(this).fadeTo(0,min);}_x000D_
} else if (objectBottom > windowBottom) {_x000D_
if (objectTop < windowBottom) {$(this).fadeTo(0,min+((max-min)*((windowBottom-objectTop)/objectHeight)));}_x000D_
else if ($(this).css("opacity")>=min+threshold || pageLoad) {$(this).fadeTo(0,min);}_x000D_
} else if ($(this).css("opacity")<=max-threshold || pageLoad) {$(this).fadeTo(0,max);}_x000D_
});_x000D_
} fade(true); //fade elements on page-load_x000D_
$(window).scroll(function(){fade(false);}); //fade elements on scroll_x000D_
});
_x000D_
.fade {_x000D_
margin: 50px;_x000D_
padding: 50px;_x000D_
background-color: lightgreen;_x000D_
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This approach avoids the warnings while preserving the array-oriented evaluation.
import numpy as np
def isnat(x):
"""
datetime64 analog to isnan.
doesn't yet exist in numpy - other ways give warnings
and are likely to change.
"""
return x.astype('i8') == np.datetime64('NaT').astype('i8')
Both codes are working fine with me on python 3.7..... hope will work for u as well
import tkinter as tk
m=tk.Tk()
m.iconbitmap("myfavicon.ico")
m.title("SALAH Tutorials")
m.mainloop()
and do not forget to keep "myfavicon.ico" in the same folder where your project script file is present
Another method
from tkinter import *
m=Tk()
m.iconbitmap("myfavicon.ico")
m.title("SALAH Tutorials")
m.mainloop()
[*NOTE:- python version-3 works with tkinter and below version-3 i.e version-2 works with Tkinter]
Static classes don't require you to create an object of that class/instantiate them, you can prefix the C# keyword static in front of the class name, to make it static.
Remember: we're not instantiating the Console class, String class, Array Class.
class Book
{
public static int myInt = 0;
}
public class Exercise
{
static void Main()
{
Book book = new Book();
//Use the class name directly to call the property myInt,
//don't use the object to access the value of property myInt
Console.WriteLine(Book.myInt);
Console.ReadKey();
}
}
The @SqlZim's answer is correct but just to explain why this possibly have happened. I've had similar issue and this was caused by very innocent thing: adding default value to a column
ALTER TABLE MySchema.MyTable ADD
MyColumn int DEFAULT NULL;
But in the realm of MS SQL Server a default value on a colum is a CONSTRAINT. And like every constraint it has an identifier. And you cannot drop a column if it is used in a CONSTRAINT.
So what you can actually do avoid this kind of problems is always give your default constraints a explicit name, for example:
ALTER TABLE MySchema.MyTable ADD
MyColumn int NULL,
CONSTRAINT DF_MyTable_MyColumn DEFAULT NULL FOR MyColumn;
You'll still have to drop the constraint before dropping the column, but you will at least know its name up front.
As most answers state setdefault
or defaultdict
would let you set a default value when a key doesn't exist. However, I would like to point out a small caveat with regard to the use cases of setdefault
. When the Python interpreter executes setdefault
it will always evaluate the second argument to the function even if the key exists in the dictionary. For example:
In: d = {1:5, 2:6}
In: d
Out: {1: 5, 2: 6}
In: d.setdefault(2, 0)
Out: 6
In: d.setdefault(2, print('test'))
test
Out: 6
As you can see, print
was also executed even though 2 already existed in the dictionary. This becomes particularly important if you are planning to use setdefault
for example for an optimization like memoization
. If you add a recursive function call as the second argument to setdefault
, you wouldn't get any performance out of it as Python would always be calling the function recursively.
Since memoization was mentioned, a better alternative is to use functools.lru_cache decorator if you consider enhancing a function with memoization. lru_cache handles the caching requirements for a recursive function better.
Well you can remove the third calendar instance.
GregorianCalendar c1 = new GregorianCalendar();
GregorianCalendar c2 = new GregorianCalendar();
c1.set(2000, 1, 1);
c2.set(2010,1, 1);
c2.add(GregorianCalendar.MILLISECOND, -1 * c1.getTimeInMillis());
You can't use fetch in actions without middleware. Actions must be plain objects. You can use a middleware like redux-thunk or redux-saga to do fetch and then dispatch another action.
Here is an example of async action using redux-thunk middleware.
export function checkUserLoggedIn (authCode) {
let url = `${loginUrl}validate?auth_code=${authCode}`;
return dispatch => {
return fetch(url,{
method: 'GET',
headers: {
"Content-Type": "application/json"
}
}
)
.then((resp) => {
let json = resp.json();
if (resp.status >= 200 && resp.status < 300) {
return json;
} else {
return json.then(Promise.reject.bind(Promise));
}
})
.then(
json => {
if (json.result && (json.result.status === 'error')) {
dispatch(errorOccurred(json.result));
dispatch(logOut());
}
else{
dispatch(verified(json.result));
}
}
)
.catch((error) => {
dispatch(warningOccurred(error, url));
})
}
}
Suppose logical address space is **32 bit so total possible logical entries will be 2^32 and other hand suppose each page size is 4 byte then size of one page is *2^2*2^10=2^12...* now we know that no. of pages in page table is pages=total possible logical address entries/page size so pages=2^32/2^12 =2^20 Now suppose that each entry in page table takes 4 bytes then total size of page table in *physical memory will be=2^2*2^20=2^22=4mb***
You have a JSON Lines format text file. You need to parse your file line by line:
import json
data = []
with open('file') as f:
for line in f:
data.append(json.loads(line))
Each line contains valid JSON, but as a whole, it is not a valid JSON value as there is no top-level list or object definition.
Note that because the file contains JSON per line, you are saved the headaches of trying to parse it all in one go or to figure out a streaming JSON parser. You can now opt to process each line separately before moving on to the next, saving memory in the process. You probably don't want to append each result to one list and then process everything if your file is really big.
If you have a file containing individual JSON objects with delimiters in-between, use How do I use the 'json' module to read in one JSON object at a time? to parse out individual objects using a buffered method.
If the command should work with both tabs and spaces as the delimiter I would use awk
:
awk '{print $100,$101,$102,$103,$104,$105}' myfile > outfile
As long as you just need to specify 5 fields it is imo ok to just type them, for longer ranges you can use a for
loop:
awk '{for(i=100;i<=105;i++)print $i}' myfile > outfile
If you want to use cut
, you need to use the -f
option:
cut -f100-105 myfile > outfile
If the field delimiter is different from TAB
you need to specify it using -d
:
cut -d' ' -f100-105 myfile > outfile
Check the man page for more info on the cut command.
Just putting my 2 cents here.
Given the following class:
class Foo
{
private $data;
public function __construct(array $data)
{
$this->data = $data;
}
public function __get($name)
{
return $data[$name];
}
public function __isset($name)
{
return array_key_exists($name, $this->data);
}
}
the following will happen:
$foo = new Foo(['key' => 'value', 'bar' => null]);
var_dump(property_exists($foo, 'key')); // false
var_dump(isset($foo->key)); // true
var_dump(property_exists($foo, 'bar')); // false
var_dump(isset($foo->bar)); // true, although $data['bar'] == null
Hope this will help anyone
IIS Mime Type: .woff font/x-woff (not application/x-woff, or application/x-font-woff)
You are simply reducing the values from a number. So substracting 6 from 3 (date) will return -3 only.
You need to individually add/remove unit of time in date object
var date = new Date();
date.setDate( date.getDate() - 6 );
date.setFullYear( date.getFullYear() - 1 );
$("#searchDateFrom").val((date.getMonth() ) + '/' + (date.getDate()) + '/' + (date.getFullYear()));
The current version (2019/03/07) is Build Tools for Visual Studio 2017. It's an online installer, you need to include at least the individual components:
it may be that the application/x-www-form-urlencoded midia type convert space to +, and the reciever will decode the data by converting the + to space.check the url for more info.http://www.w3.org/TR/html401/interact/forms.html#h-17.13.4.1
Calling this method does not cause the delegate to receive a
tableView:willSelectRowAtIndexPath:
ortableView:didSelectRowAtIndexPath:
message, nor does it sendUITableViewSelectionDidChangeNotification
notifications to observers.
What I would do is:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
[self doSomethingWithRowAtIndexPath:indexPath];
}
And then, from where you wanted to call selectRowAtIndexPath, you instead call doSomethingWithRowAtIndexPath. On top of that, you can additionally also call selectRowAtIndexPath if you want the UI feedback to happen.
We can achieve this by Using mongo js file. Add below code in your getCollectionName.js file and run js file in the console of Linux as given below :
mongo --host 192.168.1.135 getCollectionName.js
db_set = connect("192.168.1.135:27017/database_set_name"); // for Local testing
// db_set.auth("username_of_db", "password_of_db"); // if required
db_set.getMongo().setSlaveOk();
var collectionArray = db_set.getCollectionNames();
collectionArray.forEach(function(collectionName){
if ( collectionName == 'system.indexes' || collectionName == 'system.profile' || collectionName == 'system.users' ) {
return;
}
print("\nCollection Name = "+collectionName);
print("All Fields :\n");
var arrayOfFieldNames = [];
var items = db_set[collectionName].find();
// var items = db_set[collectionName].find().sort({'_id':-1}).limit(100); // if you want fast & scan only last 100 records of each collection
while(items.hasNext()) {
var item = items.next();
for(var index in item) {
arrayOfFieldNames[index] = index;
}
}
for (var index in arrayOfFieldNames) {
print(index);
}
});
quit();
Thanks @ackuser
In python the with
keyword is used when working with unmanaged resources (like file streams). It is similar to the using
statement in VB.NET and C#. It allows you to ensure that a resource is "cleaned up" when the code that uses it finishes running, even if exceptions are thrown. It provides 'syntactic sugar' for try/finally
blocks.
From Python Docs:
The
with
statement clarifies code that previously would usetry...finally
blocks to ensure that clean-up code is executed. In this section, I’ll discuss the statement as it will commonly be used. In the next section, I’ll examine the implementation details and show how to write objects for use with this statement.The
with
statement is a control-flow structure whose basic structure is:with expression [as variable]: with-block
The expression is evaluated, and it should result in an object that supports the context management protocol (that is, has
__enter__()
and__exit__()
methods).
Update fixed VB callout per Scott Wisniewski's comment. I was indeed confusing with
with using
.
Yes.you have to loop it
public int getIndex(String itemName)
{
for (int i = 0; i < arraylist.size(); i++)
{
AuctionItem auction = arraylist.get(i);
if (itemName.equals(auction.getname()))
{
return i;
}
}
return -1;
}
As an alternative to using ExpectedException
attribute, I sometimes define two helpful methods for my test classes:
AssertThrowsException()
takes a delegate and asserts that it throws the expected exception with the expected message.
AssertDoesNotThrowException()
takes the same delegate and asserts that it does not throw an exception.
This pairing can be very useful when you want to test that an exception is thrown in one case, but not the other.
Using them my unit test code might look like this:
ExceptionThrower callStartOp = delegate(){ testObj.StartOperation(); };
// Check exception is thrown correctly...
AssertThrowsException(callStartOp, typeof(InvalidOperationException), "StartOperation() called when not ready.");
testObj.Ready = true;
// Check exception is now not thrown...
AssertDoesNotThrowException(callStartOp);
Nice and neat huh?
My AssertThrowsException()
and AssertDoesNotThrowException()
methods are defined on a common base class as follows:
protected delegate void ExceptionThrower();
/// <summary>
/// Asserts that calling a method results in an exception of the stated type with the stated message.
/// </summary>
/// <param name="exceptionThrowingFunc">Delegate that calls the method to be tested.</param>
/// <param name="expectedExceptionType">The expected type of the exception, e.g. typeof(FormatException).</param>
/// <param name="expectedExceptionMessage">The expected exception message (or fragment of the whole message)</param>
protected void AssertThrowsException(ExceptionThrower exceptionThrowingFunc, Type expectedExceptionType, string expectedExceptionMessage)
{
try
{
exceptionThrowingFunc();
Assert.Fail("Call did not raise any exception, but one was expected.");
}
catch (NUnit.Framework.AssertionException)
{
// Ignore and rethrow NUnit exception
throw;
}
catch (Exception ex)
{
Assert.IsInstanceOfType(expectedExceptionType, ex, "Exception raised was not the expected type.");
Assert.IsTrue(ex.Message.Contains(expectedExceptionMessage), "Exception raised did not contain expected message. Expected=\"" + expectedExceptionMessage + "\", got \"" + ex.Message + "\"");
}
}
/// <summary>
/// Asserts that calling a method does not throw an exception.
/// </summary>
/// <remarks>
/// This is typically only used in conjunction with <see cref="AssertThrowsException"/>. (e.g. once you have tested that an ExceptionThrower
/// method throws an exception then your test may fix the cause of the exception and then call this to make sure it is now fixed).
/// </remarks>
/// <param name="exceptionThrowingFunc">Delegate that calls the method to be tested.</param>
protected void AssertDoesNotThrowException(ExceptionThrower exceptionThrowingFunc)
{
try
{
exceptionThrowingFunc();
}
catch (NUnit.Framework.AssertionException)
{
// Ignore and rethrow any NUnit exception
throw;
}
catch (Exception ex)
{
Assert.Fail("Call raised an unexpected exception: " + ex.Message);
}
}
There are two solutions for this issue.
First, is to create fields with default values set in datatable. It could be empty string, which is fine for MySQL server running in strict mode.
Second, if you started to get this error just recently, after MySQL/MariaDB upgrade, like I did, and in case you already have large project with a lot to fix, all you need to do is to edit MySQL/MariaDB configuration file (for example /etc/my.cnf
) and disable strict mode for tables:
[mysqld]
sql_mode=NO_ENGINE_SUBSTITUTION
This error started to happen quite recently, due to new strict mode enabled by default. Removing STRICT_TRANS_TABLES
from sql_mode
configuration key, makes it work as before.
They are hint to the compiler to emit instructions that will cause branch prediction to favour the "likely" side of a jump instruction. This can be a big win, if the prediction is correct it means that the jump instruction is basically free and will take zero cycles. On the other hand if the prediction is wrong, then it means the processor pipeline needs to be flushed and it can cost several cycles. So long as the prediction is correct most of the time, this will tend to be good for performance.
Like all such performance optimisations you should only do it after extensive profiling to ensure the code really is in a bottleneck, and probably given the micro nature, that it is being run in a tight loop. Generally the Linux developers are pretty experienced so I would imagine they would have done that. They don't really care too much about portability as they only target gcc, and they have a very close idea of the assembly they want it to generate.
You should use new
when you wish an object to remain in existence until you delete
it. If you do not use new
then the object will be destroyed when it goes out of scope. Some examples of this are:
void foo()
{
Point p = Point(0,0);
} // p is now destroyed.
for (...)
{
Point p = Point(0,0);
} // p is destroyed after each loop
Some people will say that the use of new
decides whether your object is on the heap or the stack, but that is only true of variables declared within functions.
In the example below the location of 'p' will be where its containing object, Foo, is allocated. I prefer to call this 'in-place' allocation.
class Foo
{
Point p;
}; // p will be automatically destroyed when foo is.
Allocating (and freeing) objects with the use of new
is far more expensive than if they are allocated in-place so its use should be restricted to where necessary.
A second example of when to allocate via new
is for arrays. You cannot* change the size of an in-place or stack array at run-time so where you need an array of undetermined size it must be allocated via new.
E.g.
void foo(int size)
{
Point* pointArray = new Point[size];
...
delete [] pointArray;
}
(*pre-emptive nitpicking - yes, there are extensions that allow variable sized stack allocations).
You can disable validators conditionally by removing errors from ModelState:
ModelState["DependentProperty"].Errors.Clear();
Usual way is to go with PHP and ajax. But for your requirement, below will work fine.
<body>
https://www.google.com/controller/Add/2/2<br>
https://www.google.com/controller/Sub/5/2<br>
https://www.google.com/controller/Multi/3/2<br><br>
<input type="text" id="url" placeholder="RESTful URL" />
<input type="button" id="sub" value="Answer" />
<p>
<div id="display"></div>
</body>
<script type="text/javascript">
document.getElementById('sub').onclick = function(){
var url = document.getElementById('url').value;
var controller = null;
var method = null;
var parm = [];
//validating URLs
function URLValidation(url){
if (url.indexOf("http://") == 0 || url.indexOf("https://") == 0) {
var x = url.split('/');
controller = x[3];
method = x[4];
parm[0] = x[5];
parm[1] = x[6];
}
}
//Calculations
function Add(a,b){
return Number(a)+ Number(b);
}
function Sub(a,b){
return Number(a)/Number(b);
}
function Multi(a,b){
return Number(a)*Number(b);
}
//JSON Response
function ResponseRequest(status,res){
var res = {status: status, response: res};
document.getElementById('display').innerHTML = JSON.stringify(res);
}
//Process
function ProcessRequest(){
if(method=="Add"){
ResponseRequest("200",Add(parm[0],parm[1]));
}else if(method=="Sub"){
ResponseRequest("200",Sub(parm[0],parm[1]));
}else if(method=="Multi"){
ResponseRequest("200",Multi(parm[0],parm[1]));
}else {
ResponseRequest("404","Not Found");
}
}
URLValidation(url);
ProcessRequest();
};
</script>
sudo service mysql restart
Or
sudo restart mysql
If you know it's going to be just two fields, you can skip the extra subprocesses like this:
var1=${STR%-*}
var2=${STR#*-}
What does this do? ${STR%-*}
deletes the shortest substring of $STR
that matches the pattern -*
starting from the end of the string. ${STR#*-}
does the same, but with the *-
pattern and starting from the beginning of the string. They each have counterparts %%
and ##
which find the longest anchored pattern match. If anyone has a helpful mnemonic to remember which does which, let me know! I always have to try both to remember.