I think what you want is a different content mode
. Try using UIViewContentModeScaleToFill
. This will scale the content to fit the size of ur UIImageView by changing the aspect ratio of the content if necessary.
Have a look to the content mode
section on the official doc to get a better idea of the different content mode available (it is illustrated with images).
I've quickly thrown together one that allows choice of direction ("asc" or "desc"), whether the comparison should be done on the option value (true or false) and whether or not leading and trailing whitespace should be trimmed before comparison (boolean).
The benefit of this method, is that the selected choice is kept, and all other special properties/triggers should also be kept.
function sortOpts(select,dir,value,trim)
{
value = typeof value == 'boolean' ? value : false;
dir = ['asc','desc'].indexOf(dir) > -1 ? dir : 'asc';
trim = typeof trim == 'boolean' ? trim : true;
if(!select) return false;
var opts = select.getElementsByTagName('option');
var options = [];
for(var i in opts)
{
if(parseInt(i)==i)
{
if(trim)
{
opts[i].innerHTML = opts[i].innerHTML.replace(/^\s*(.*)\s*$/,'$1');
opts[i].value = opts[i].value.replace(/^\s*(.*)\s*$/,'$1');
}
options.push(opts[i]);
}
}
options.sort(value ? sortOpts.sortVals : sortOpts.sortText);
if(dir == 'desc') options.reverse();
options.reverse();
for(var i in options)
{
select.insertBefore(options[i],select.getElementsByTagName('option')[0]);
}
}
sortOpts.sortText = function(a,b) {
return a.innerHTML > b.innerHTML ? 1 : -1;
}
sortOpts.sortVals = function(a,b) {
return a.value > b.value ? 1 : -1;
}
For Swift 3 Xcode 8.......
let button = UIButton(frame: CGRect(x: 0, y: 0, width: container.width, height: container.height))
button.addTarget(self, action: #selector(self.barItemTapped), for: .touchUpInside)
func barItemTapped(sender : UIButton) {
//Write button action here
}
I do not know why there is no answer directly addressing the problem. When you
want to compile C++ program, it is best to use clang++
. For example, the
following works for me:
clang++ -Wall -std=c++11 test.cc -o test
If compiled correctly, it will produce the executable file test
, and you can
run the file by using ./test
.
Or you can just use clang++ test.cc
to compile the program. It will produce a
default executable file named a.out
. Use ./a.out
to run the file.
The whole process is a lot like g++ if you are familiar with g++. See this
post to check which warnings are included with -Wall
option. This
page shows a list of diagnostic flags supported by Clang.
A note on using clang -x c++
: Kim Gräsman says that you can also use
clang -x c++
to compile cpp programs, but that may not be true. For example,
I am having a simple program below:
#include <iostream>
#include <vector>
int main() {
/* std::vector<int> v = {1, 2, 3, 4, 5}; */
std::vector<int> v(10, 5);
int sum = 0;
for (int i = 0; i < v.size(); i++){
sum += v[i]*2;
}
std::cout << "sum is " << sum << std::endl;
return 0;
}
clang++ test.cc -o test
will compile successfully, but clang -x c++
will
not, showing a lot undefined references errors. So I guess they are not exactly
equivalent. It is best to use clang++
instead of clang -x c++
when
compiling c++ programs to avoid extra troubles.
Nesting a stackpanel will cause the textbox to wrap properly:
<Viewbox Margin="120,0,120,0">
<StackPanel Orientation="Vertical" Width="400">
<TextBlock x:Name="subHeaderText"
FontSize="20"
TextWrapping="Wrap"
Foreground="Black"
Text="Lorem ipsum dolor, lorem isum dolor,Lorem ipsum dolor sit amet, lorem ipsum dolor sit amet " />
</StackPanel>
</Viewbox>
Check whether your device supports the version you specified in minSdkVersion in AndroidManifest.xml . If not specify the lower version and try again
Here is a situation where there is definitely a need for inheritance for static fields and methods:
abstract class Animal
{
protected static string[] legs;
static Animal() {
legs=new string[0];
}
public static void printLegs()
{
foreach (string leg in legs) {
print(leg);
}
}
}
class Human: Animal
{
static Human() {
legs=new string[] {"left leg", "right leg"};
}
}
class Dog: Animal
{
static Dog() {
legs=new string[] {"left foreleg", "right foreleg", "left hindleg", "right hindleg"};
}
}
public static void main() {
Dog.printLegs();
Human.printLegs();
}
//what is the output?
//does each subclass get its own copy of the array "legs"?
There are multiple methods for handling this problem.
My advice is to use the powerful Windows freeware console application SendEmail.
sendEmail.exe -f [email protected] -o message-file=body.txt -u subject message -t [email protected] -a attachment.zip -s smtp.gmail.com:446 -xu gmail.login -xp gmail.password
With respect to binning functions, I didn't expect the result of the functions offered so far. Namely, if my binwidth is 0.001, these functions were centering the bins on 0.0005 points, whereas I feel it's more intuitive to have the bins centered on 0.001 boundaries.
In other words, I'd like to have
Bin 0.001 contain data from 0.0005 to 0.0014
Bin 0.002 contain data from 0.0015 to 0.0024
...
The binning function I came up with is
my_bin(x,width) = width*(floor(x/width+0.5))
Here's a script to compare some of the offered bin functions to this one:
rint(x) = (x-int(x)>0.9999)?int(x)+1:int(x)
bin(x,width) = width*rint(x/width) + width/2.0
binc(x,width) = width*(int(x/width)+0.5)
mitar_bin(x,width) = width*floor(x/width) + width/2.0
my_bin(x,width) = width*(floor(x/width+0.5))
binwidth = 0.001
data_list = "-0.1386 -0.1383 -0.1375 -0.0015 -0.0005 0.0005 0.0015 0.1375 0.1383 0.1386"
my_line = sprintf("%7s %7s %7s %7s %7s","data","bin()","binc()","mitar()","my_bin()")
print my_line
do for [i in data_list] {
iN = i + 0
my_line = sprintf("%+.4f %+.4f %+.4f %+.4f %+.4f",iN,bin(iN,binwidth),binc(iN,binwidth),mitar_bin(iN,binwidth),my_bin(iN,binwidth))
print my_line
}
and here's the output
data bin() binc() mitar() my_bin()
-0.1386 -0.1375 -0.1375 -0.1385 -0.1390
-0.1383 -0.1375 -0.1375 -0.1385 -0.1380
-0.1375 -0.1365 -0.1365 -0.1375 -0.1380
-0.0015 -0.0005 -0.0005 -0.0015 -0.0010
-0.0005 +0.0005 +0.0005 -0.0005 +0.0000
+0.0005 +0.0005 +0.0005 +0.0005 +0.0010
+0.0015 +0.0015 +0.0015 +0.0015 +0.0020
+0.1375 +0.1375 +0.1375 +0.1375 +0.1380
+0.1383 +0.1385 +0.1385 +0.1385 +0.1380
+0.1386 +0.1385 +0.1385 +0.1385 +0.1390
Your error is caused by these:
Dim oTable As Table, oRow As Row,
These types, Table
and Row
are not variable types native to Excel. You can resolve this in one of two ways:
Dim oTable as Word.Table, oRow as Word.Row
. This is called early-binding. Object
type: Dim oTable as Object, oRow as Object
. With this method, you do not need to add the reference to Word, but you also lose the intellisense assistance in the VBE.I have not tested your code but I suspect ActiveDocument
won't work in Excel with method #2, unless you properly scope it to an instance of a Word.Application object. I don't see that anywhere in the code you have provided. An example would be like:
Sub DeleteEmptyRows()
Dim wdApp as Object
Dim oTable As Object, As Object, _
TextInRow As Boolean, i As Long
Set wdApp = GetObject(,"Word.Application")
Application.ScreenUpdating = False
For Each oTable In wdApp.ActiveDocument.Tables
Simplest way to throw an Exception in C++:
#include <iostream>
using namespace std;
void purturb(){
throw "Cannot purturb at this time.";
}
int main() {
try{
purturb();
}
catch(const char* msg){
cout << "We caught a message: " << msg << endl;
}
cout << "done";
return 0;
}
This prints:
We caught a message: Cannot purturb at this time.
done
If you catch the thrown exception, the exception is contained and the program will ontinue. If you do not catch the exception, then the program exists and prints:
This application has requested the Runtime to terminate it in an unusual way. Please contact the application's support team for more information.
Pre-compiling the regex increases the speed. Re-using the Matcher gives you another slight speedup. If the method gets called frequently say gets called within a loop, the overall performace will certainly go up.
You can just iterate over the elements in the array and call array[i].trim()
on each element
Add white-space: nowrap;
:
.garage-title {
clear: both;
display: inline-block;
overflow: hidden;
white-space: nowrap;
}
In my opinion, some of the node.js examples are quite contrived.
You might expect to see something more like this in the real world
// square.js
function Square(width) {
if (!(this instanceof Square)) {
return new Square(width);
}
this.width = width;
};
Square.prototype.area = function area() {
return Math.pow(this.width, 2);
};
module.exports = Square;
Usage
var Square = require("./square");
// you can use `new` keyword
var s = new Square(5);
s.area(); // 25
// or you can skip it!
var s2 = Square(10);
s2.area(); // 100
For the ES6 people
class Square {
constructor(width) {
this.width = width;
}
area() {
return Math.pow(this.width, 2);
}
}
export default Square;
Using it in ES6
import Square from "./square";
// ...
When using a class, you must use the new
keyword to instatiate it. Everything else stays the same.
The following method should do what you want, just make sure you are checking the return value of mkdir() / mkdirs()
private void createUserDir(final String dirName) throws IOException {
final File homeDir = new File(System.getProperty("user.home"));
final File dir = new File(homeDir, dirName);
if (!dir.exists() && !dir.mkdirs()) {
throw new IOException("Unable to create " + dir.getAbsolutePath();
}
}
Try this:
public double getDistance(GeoCoordinate p1, GeoCoordinate p2)
{
double d = p1.Latitude * 0.017453292519943295;
double num3 = p1.Longitude * 0.017453292519943295;
double num4 = p2.Latitude * 0.017453292519943295;
double num5 = p2.Longitude * 0.017453292519943295;
double num6 = num5 - num3;
double num7 = num4 - d;
double num8 = Math.Pow(Math.Sin(num7 / 2.0), 2.0) + ((Math.Cos(d) * Math.Cos(num4)) * Math.Pow(Math.Sin(num6 / 2.0), 2.0));
double num9 = 2.0 * Math.Atan2(Math.Sqrt(num8), Math.Sqrt(1.0 - num8));
return (6376500.0 * num9);
}
Yo could also set labels = FALSE
inside axis(...)
and print the labels in a separate command with Text. With this option you can rotate the text the text in case you need it
lablist<-as.vector(c(1:10))
axis(1, at=seq(1, 10, by=1), labels = FALSE)
text(seq(1, 10, by=1), par("usr")[3] - 0.2, labels = lablist, srt = 45, pos = 1, xpd = TRUE)
Detailed explanation here
In my case, My principal was kafka/[email protected]
I got below lines in the terminal:
>>> KrbKdcReq send: #bytes read=190
>>> KdcAccessibility: remove kerberos.niroshan.com
>>> KDCRep: init() encoding tag is 126 req type is 13
>>>KRBError:
cTime is Thu Oct 05 03:42:15 UTC 1995 812864535000
sTime is Fri May 31 06:43:38 UTC 2019 1559285018000
suSec is 111309
error code is 7
error Message is Server not found in Kerberos database
cname is kafka/[email protected]
sname is kafka/[email protected]
msgType is 30
After hours of checking, I just found the below line has a wrong value in kafka_2.12-2.2.0/server.properties
listeners=SASL_PLAINTEXT://kafka.com:9092
Also I got two entries of kafka.niroshan.com
and kafka.com
for same IP address.
I changed it to as listeners=SASL_PLAINTEXT://kafka.niroshan.com:9092
Then it worked!
According to the below link, the principal should contain the Fully Qualified Domain Name (FQDN) of each host and it should be matched with the principal.
https://docs.oracle.com/cd/E19253-01/816-4557/planning-25/index.html
well these are specified by the w3c what is an attribute and what is a property http://www.w3.org/TR/SVGTiny12/attributeTable.html
but currently attr and prop are not so different and there are almost the same
but they prefer prop for some things
Summary of Preferred Usage
The .prop() method should be used for boolean attributes/properties and for properties which do not exist in html (such as window.location). All other attributes (ones you can see in the html) can and should continue to be manipulated with the .attr() method.
well actually you dont have to change something if you use attr or prop or both, both work but i saw in my own application that prop worked where atrr didnt so i took in my 1.6 app prop =)
This was working for me so Try This: $ad->getcodes()->distinct('pid')->count()
Under the connection properties, uncheck "Enable background refresh". This will make the connection refresh when told to, not in the background as other processes happen.
With background refresh disabled, your VBA procedure will wait for your external data to refresh before moving to the next line of code.
Then you just modify the following code:
ActiveWorkbook.Connections("CONNECTION_NAME").Refresh
Sheets("SHEET_NAME").PivotTables("PIVOT_TABLE_NAME").PivotCache.Refresh
You can also turn off background refresh in VBA:
ActiveWorkbook.Connections("CONNECTION_NAME").ODBCConnection.BackgroundQuery = False
I had the same problem, when i disabled chrome extension called ZenMate Proxy extension that fixed the problem
You don't mention if it has to be batch only, but if you can use ROBOCOPY
, try this:
ROBOCOPY C:\Source C:\Destination data.zip info.txt /E
EDIT: Changed the /S
parameter to /E
to include empty folders.
Here is a query, you can run it in SQL Developer (or SQL*Plus):
SELECT DS.TABLESPACE_NAME, SEGMENT_NAME, ROUND(SUM(DS.BYTES) / (1024 * 1024)) AS MB
FROM DBA_SEGMENTS DS
WHERE SEGMENT_NAME IN (SELECT TABLE_NAME FROM DBA_TABLES)
GROUP BY DS.TABLESPACE_NAME,
SEGMENT_NAME;
Leveraging David Dehghan's answer above, the following works in Python 2.7.13:
from PyPDF2 import PdfFileWriter, PdfFileReader, PdfFileMerger
import StringIO
from reportlab.pdfgen import canvas
from reportlab.lib.pagesizes import letter
packet = StringIO.StringIO()
# create a new PDF with Reportlab
can = canvas.Canvas(packet, pagesize=letter)
can.drawString(290, 720, "Hello world")
can.save()
#move to the beginning of the StringIO buffer
packet.seek(0)
new_pdf = PdfFileReader(packet)
# read your existing PDF
existing_pdf = PdfFileReader("original.pdf")
output = PdfFileWriter()
# add the "watermark" (which is the new pdf) on the existing page
page = existing_pdf.getPage(0)
page.mergePage(new_pdf.getPage(0))
output.addPage(page)
# finally, write "output" to a real file
outputStream = open("destination.pdf", "wb")
output.write(outputStream)
outputStream.close()
teach your editor to do it-
after writing "pr_" tab i get exactly
print("<pre>");
print_r($);
print("</pre>");
with the cursor just after the $
i did it on textmate by adding this snippet:
print("<pre>");
print_r(\$${1:});
print("</pre>");
String format = "https://drive.google.com/viewerng/viewer?embedded=true&url=%s";
String fullPath = String.format(Locale.ENGLISH, format, "PDF_URL_HERE");
Intent browserIntent = new Intent(Intent.ACTION_VIEW, Uri.parse(fullPath));
startActivity(browserIntent);
On the Mac version I was getting the error when trying to run JSON-Clojure.json.clj, which is the script to export a database table to JSON. To get it to work I had to download the latest Clojure JAR from http://clojure.org/ and then right-click on PHPStorm app in the Finder and "Show Package Contents". Then go to Contents in there. Then open the lib folder, and see a bunch of .jar files. Copy the clojure-1.8.0.jar file from the unzipped archive I downloaded from clojure.org into the aforementioned lib folder inside the PHPStorm.app/Contents/lib. Restart the app. Now it freaking works.
EDIT: You also have to put the JSR-223 script engine into PHPStorm.app/Contents/lib. It can be built from https://github.com/ato/clojure-jsr223 or downloaded from https://www.dropbox.com/s/jg7s0c41t5ceu7o/clojure-jsr223-1.5.1.jar?dl=0 .
An IP gives you an quite unreliable location, you could Ajax the location upon load with JS if it isn't critical to have the location at first. (Also, the user need's to give you it's permission to access it.)
Update 2018
Bootstrap 4
Now that BS4 is flexbox, the fixed-fluid is simple. Just set the width of the fixed column, and use the .col
class on the fluid column.
.sidebar {
width: 180px;
min-height: 100vh;
}
<div class="row">
<div class="sidebar p-2">Fixed width</div>
<div class="col bg-dark text-white pt-2">
Content
</div>
</div>
http://www.codeply.com/go/7LzXiPxo6a
Bootstrap 3..
One approach to a fixed-fluid layout is using media queries that align with Bootstrap's breakpoints so that you only use the fixed width columns are larger screens and then let the layout stack responsively on smaller screens...
@media (min-width:768px) {
#sidebar {
min-width: 300px;
max-width: 300px;
}
#main {
width:calc(100% - 300px);
}
}
Working Bootstrap 3 Fixed-Fluid Demo
Related Q&A:
Fixed width column with a container-fluid in bootstrap
How to left column fixed and right scrollable in Bootstrap 4, responsive?
The code snippet you gave does indeed load the entire set of data and then counts it client-side, which can be very slow for large amounts of data.
Firebase doesn't currently have a way to count children without loading data, but we do plan to add it.
For now, one solution would be to maintain a counter of the number of children and update it every time you add a new child. You could use a transaction to count items, like in this code tracking upvodes:
var upvotesRef = new Firebase('https://docs-examples.firebaseio.com/android/saving-data/fireblog/posts/-JRHTHaIs-jNPLXOQivY/upvotes');
upvotesRef.transaction(function (current_value) {
return (current_value || 0) + 1;
});
For more info, see https://www.firebase.com/docs/transactions.html
UPDATE: Firebase recently released Cloud Functions. With Cloud Functions, you don't need to create your own Server. You can simply write JavaScript functions and upload it to Firebase. Firebase will be responsible for triggering functions whenever an event occurs.
If you want to count upvotes for example, you should create a structure similar to this one:
{
"posts" : {
"-JRHTHaIs-jNPLXOQivY" : {
"upvotes_count":5,
"upvotes" : {
"userX" : true,
"userY" : true,
"userZ" : true,
...
}
}
}
}
And then write a javascript function to increase the upvotes_count
when there is a new write to the upvotes
node.
const functions = require('firebase-functions');
const admin = require('firebase-admin');
admin.initializeApp(functions.config().firebase);
exports.countlikes = functions.database.ref('/posts/$postid/upvotes').onWrite(event => {
return event.data.ref.parent.child('upvotes_count').set(event.data.numChildren());
});
You can read the Documentation to know how to Get Started with Cloud Functions.
Also, another example of counting posts is here: https://github.com/firebase/functions-samples/blob/master/child-count/functions/index.js
The firebase docs have changed so instead of event
we now have change
and context
.
The given example throws an error complaining that event.data
is undefined. This pattern seems to work better:
exports.countPrescriptions = functions.database.ref(`/prescriptions`).onWrite((change, context) => {
const data = change.after.val();
const count = Object.keys(data).length;
return change.after.ref.child('_count').set(count);
});
```
sleep 999&
t=$!
sleep 10
kill $t
This one will gets the job done nicely:
public static String removeZero(double number) {
DecimalFormat format = new DecimalFormat("#.###########");
return format.format(number);
}
Here's a quick local task to permanently set key/values on /etc/environment
(which is system-wide, all users):
- name: populate /etc/environment
lineinfile:
dest: "/etc/environment"
state: present
regexp: "^{{ item.key }}="
line: "{{ item.key }}={{ item.value}}"
with_items: "{{ os_environment }}"
and the vars for it:
os_environment:
- key: DJANGO_SETTINGS_MODULE
value : websec.prod_settings
- key: DJANGO_SUPER_USER
value : admin
and, yes, if you ssh out and back in, env
shows the new environment variables.
For MySQL, there is Querious and Sequel Pro. The former costs US$25, and the latter is free. You can find a comparison of them here, and a list of some other Mac OS X MySQL clients here.
Steve
You can uninstall your windows service by command prompt also just write this piece of command
cd\
cd C:\Windows\Microsoft.NET\Framework\v4.0.30319(or version in which you developed your service)
installutil c:\\xxx.exe(physical path of your service) -d
import json
array = '{"fruits": ["apple", "banana", "orange"]}'
data = json.loads(array)
print data['fruits']
# the print displays:
# [u'apple', u'banana', u'orange']
You had everything you needed. data
will be a dict, and data['fruits']
will be a list
$DBH = new PDO( "connection string goes here" );
$STH - $DBH -> prepare( "select figure from table1 ORDER BY x LIMIT 1" );
$STH -> execute();
$result = $STH -> fetch();
echo $result ["figure"];
$DBH = null;
You can use fetch and LIMIT together. LIMIT has the effect that the database returns only one entry so PHP has to handle very less data. With fetch you get the first (and only) result entry from the database reponse.
You can do more optimizing by setting the fetching type, see http://www.php.net/manual/de/pdostatement.fetch.php. If you access it only via column names you need to numbered array.
Be aware of the ORDER clause. Use ORDER or WHERE to get the needed row. Otherwise you will get the first row in the table alle the time.
Your model is null
because the way you're supplying the inputs to your form means the model binder has no way to distinguish between the elements. Right now, this code:
@foreach (var planVM in Model)
{
@Html.Partial("_partialView", planVM)
}
is not supplying any kind of index to those items. So it would repeatedly generate HTML output like this:
<input type="hidden" name="yourmodelprefix.PlanID" />
<input type="hidden" name="yourmodelprefix.CurrentPlan" />
<input type="checkbox" name="yourmodelprefix.ShouldCompare" />
However, as you're wanting to bind to a collection, you need your form elements to be named with an index, such as:
<input type="hidden" name="yourmodelprefix[0].PlanID" />
<input type="hidden" name="yourmodelprefix[0].CurrentPlan" />
<input type="checkbox" name="yourmodelprefix[0].ShouldCompare" />
<input type="hidden" name="yourmodelprefix[1].PlanID" />
<input type="hidden" name="yourmodelprefix[1].CurrentPlan" />
<input type="checkbox" name="yourmodelprefix[1].ShouldCompare" />
That index is what enables the model binder to associate the separate pieces of data, allowing it to construct the correct model. So here's what I'd suggest you do to fix it. Rather than looping over your collection, using a partial view, leverage the power of templates instead. Here's the steps you'd need to follow:
EditorTemplates
folder inside your view's current folder (e.g. if your view is Home\Index.cshtml
, create the folder Home\EditorTemplates
).PlanCompareViewModel.cshtml
.Now, everything you have in your partial view wants to go in that template:
@model PlanCompareViewModel
<div>
@Html.HiddenFor(p => p.PlanID)
@Html.HiddenFor(p => p.CurrentPlan)
@Html.CheckBoxFor(p => p.ShouldCompare)
<input type="submit" value="Compare"/>
</div>
Finally, your parent view is simplified to this:
@model IEnumerable<PlanCompareViewModel>
@using (Html.BeginForm("ComparePlans", "Plans", FormMethod.Post, new { id = "compareForm" }))
{
<div>
@Html.EditorForModel()
</div>
}
DisplayTemplates
and EditorTemplates
are smart enough to know when they are handling collections. That means they will automatically generate the correct names, including indices, for your form elements so that you can correctly model bind to a collection.
You have to either create a language file and then set it using :
"oLanguage": {
"sUrl": "media/language/your_file.txt"
}
Im not sure what server language you are using but something like this would work in PHP :
"oLanguage": {
"sUrl": "media/language/custom_lang_<?php echo $language ?>.txt"
}
Where language
matches the file name for a specific language.
or change individual settings :
"oLanguage": {
"sLengthMenu": "Display _MENU_ records per page",
"sZeroRecords": "Nothing found - sorry",
"sInfo": "Showing _START_ to _END_ of _TOTAL_ records",
"sInfoEmpty": "Showing 0 to 0 of 0 records",
"sInfoFiltered": "(filtered from _MAX_ total records)"
}
For more details read this : http://datatables.net/plug-ins/i18n
Right click on folder.
Click Properties
Click Security Tab. You will see something like this:
Check/uncheck whatever access you need to grant to the account
Click Apply button and then OK.
Why are LEFT/RIGHT and LEFT OUTER/RIGHT OUTER the same? Let's explain why this vocabulary. Understand that LEFT and RIGHT joins are specific cases of the OUTER join, and therefore couldn't be anything else than OUTER LEFT/OUTER RIGHT. The OUTER join is also called FULL OUTER as opposed to LEFT and RIGHT joins that are PARTIAL results of the OUTER join. Indeed:
Table A | Table B Table A | Table B Table A | Table B Table A | Table B
1 | 5 1 | 1 1 | 1 1 | 1
2 | 1 2 | 2 2 | 2 2 | 2
3 | 6 3 | null 3 | null - | -
4 | 2 4 | null 4 | null - | -
null | 5 - | - null | 5
null | 6 - | - null | 6
OUTER JOIN (FULL) LEFT OUTER (partial) RIGHT OUTER (partial)
It is now clear why those operations have aliases, as well as it is clear only 3 cases exist: INNER, OUTER, CROSS. With two sub-cases for the OUTER. The vocabulary, the way teachers explain this, as well as some answers above, often make it looks like there are lots of different types of join. But it's actually very simple.
(It's not action="get"
or action="post"
it's method="get"
or method="post"
Try to do it using post method:
<form action="third.php" method="POST">
Red<input type="checkbox" name="color[]" id="color" value="red">
Green<input type="checkbox" name="color[]" id="color" value="green">
Blue<input type="checkbox" name="color[]" id="color" value="blue">
Cyan<input type="checkbox" name="color[]" id="color" value="cyan">
Magenta<input type="checkbox" name="color[]" id="color" value="Magenta">
Yellow<input type="checkbox" name="color[]" id="color" value="yellow">
Black<input type="checkbox" name="color[]" id="color" value="black">
<input type="submit" value="submit">
</form>
and in third.php
or for a pericular field you colud get value in:
$_POST['color'][0] //for RED
$_POST['color'][1] // for GREEN
Your understanding is slightly flawed. The diamond operator is a nice feature as you don't have to repeat yourself. It makes sense to define the type once when you declare the type but just doesn't make sense to define it again on the right side. The DRY principle.
Now to explain all the fuzz about defining types. You are right that the type is removed at runtime but once you want to retrieve something out of a List with type definition you get it back as the type you've defined when declaring the list otherwise it would lose all specific features and have only the Object features except when you'd cast the retrieved object to it's original type which can sometimes be very tricky and result in a ClassCastException.
Using List<String> list = new LinkedList()
will get you rawtype warnings.
stopPropagation
will prevent any parent handlers from being executed stopImmediatePropagation
will prevent any parent handlers and also any other handlers from executing
Quick example from the jquery documentation:
$("p").click(function(event) {_x000D_
event.stopImmediatePropagation();_x000D_
});_x000D_
_x000D_
$("p").click(function(event) {_x000D_
// This function won't be executed_x000D_
$(this).css("background-color", "#f00");_x000D_
});
_x000D_
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>_x000D_
_x000D_
<p>example</p>
_x000D_
Note that the order of the event binding is important here!
$("p").click(function(event) {_x000D_
// This function will now trigger_x000D_
$(this).css("background-color", "#f00");_x000D_
});_x000D_
_x000D_
$("p").click(function(event) {_x000D_
event.stopImmediatePropagation();_x000D_
});
_x000D_
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>_x000D_
_x000D_
<p>example</p>
_x000D_
$(document).ready(function() {
//set initial state.
$('#textbox1').val($(this).is(':checked'));
$('#checkbox1').change(function() {
$('#textbox1').val($(this).is(':checked'));
});
$('#checkbox1').click(function() {
if (!$(this).is(':checked')) {
if(!confirm("Are you sure?"))
{
$("#checkbox1").prop("checked", true);
$('#textbox1').val($(this).is(':checked'));
}
}
});
});
You should do one more change by either below approaches:
1 Through IntelliJ GUI
As mentioned by 'tataelm':
Project Structure > Project Settings > Modules > Language level: > then change to your preferred language level
2 Edit IntelliJ config file directly
Open the <ProjectName>.iml
file (it is created automatically in your project folder if you're using IntelliJ) directly by editing the following line,
From: <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_5">
To: <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_11">
As your approach is also meaning to edit this file. :)
Approach 1 is actually asking IntelliJ to help edit the .iml file instead of doing by you directly.
slide_in_down.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
<translate
android:duration="@android:integer/config_longAnimTime"
android:fromYDelta="0%p"
android:toYDelta="100%p" />
</set>
slide_in_up.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
<translate
android:duration="@android:integer/config_longAnimTime"
android:fromYDelta="100%p"
android:toYDelta="0%p" />
</set>
slide_out_down.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
<translate
android:duration="@android:integer/config_longAnimTime"
android:fromYDelta="-100%"
android:toYDelta="0"
/>
</set>
slide_out_up.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
<translate
android:duration="@android:integer/config_longAnimTime"
android:fromYDelta="0%p"
android:toYDelta="-100%p"
/>
</set>
direction = down
activity.getSupportFragmentManager()
.beginTransaction()
.setCustomAnimations(R.anim.slide_out_down, R.anim.slide_in_down)
.replace(R.id.container, new CardFrontFragment())
.commit();
direction = up
activity.getSupportFragmentManager()
.beginTransaction()
.setCustomAnimations(R.anim.slide_in_up, R.anim.slide_out_up)
.replace(R.id.container, new CardFrontFragment())
.commit();
There are probably tests you can do, for instance if you know that the JSON returned is always going to be surrounded by {
and }
then you could test for those characters, or some other hacky method. Or you could use the json.org JS library to try and parse it and test if it succeeds.
I would however suggest a different approach. Your PHP script currently returns JSON if the call is successful, but something else if it is not. Why not always return JSON?
E.g.
Successful call:
{ "status": "success", "data": [ <your data here> ] }
Erroneous call:
{ "status": "error", "error": "Database not found" }
This would make writing your client side JS much easier - all you have to do is check the "status" member and the act accordingly.
I kept running into the problem where the database wasn't created.
I fixed it like this
mysql -u root -e "CREATE DATABASE db_name"
mysql db_name --force < import_script.sql
Are you getting this value from a database? If so, consider formatting it in the database (use date_format
in mysql, for example). If not, exploding the value may be the best bet, since strtotime just doesn't seem to appreciate dd/mm/yyyy values.
You can still use:
float ceilf(float x); // don't forget #include <math.h> and link with -lm.
example:
float valueToRound = 37.777779;
float roundedValue = ceilf(valueToRound * 100) / 100;
Well, first, you need to actually define a function before you can run it (and it doesn't need to be called main
). For instance:
class Example(object):
def run(self):
print "Hello, world!"
if __name__ == '__main__':
Example().run()
You don't need to use a class, though - if all you want to do is run some code, just put it inside a function and call the function, or just put it in the if
block:
def main():
print "Hello, world!"
if __name__ == '__main__':
main()
or
if __name__ == '__main__':
print "Hello, world!"
Well, the documentation does actually state that
CodeIgniter supports "flashdata", or session data that will only be available for the next server request, and are then automatically cleared.
as the very first thing, which obviusly means that you need to do a new server request. A redirect, a refresh, a link or some other mean to send the user to the next request.
Why use flashdata if you are using it in the same request, anyway? You'd might as well not use flashdata or use a regular session.
Here's a vanilla js example to trigger any event:
function triggerEvent(el, type){
if ('createEvent' in document) {
// modern browsers, IE9+
var e = document.createEvent('HTMLEvents');
e.initEvent(type, false, true);
el.dispatchEvent(e);
} else {
// IE 8
var e = document.createEventObject();
e.eventType = type;
el.fireEvent('on'+e.eventType, e);
}
}
I solved the problem. I made mistake in setData(Uri)
and setType(String)
.
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.fromFile(new File(Environment.getExternalStorageDirectory() + "/download/" + "app.apk")), "application/vnd.android.package-archive");
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
That is correct now, my auto-update is working. Thanks for help. =)
Edit 20.7.2016:
After a long time, I had to use this way of updating again in another project. I encountered a number of problems with old solution. A lot of things have changed in that time, so I had to do this with a different approach. Here is the code:
//get destination to update file and set Uri
//TODO: First I wanted to store my update .apk file on internal storage for my app but apparently android does not allow you to open and install
//aplication with existing package from there. So for me, alternative solution is Download directory in external storage. If there is better
//solution, please inform us in comment
String destination = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS) + "/";
String fileName = "AppName.apk";
destination += fileName;
final Uri uri = Uri.parse("file://" + destination);
//Delete update file if exists
File file = new File(destination);
if (file.exists())
//file.delete() - test this, I think sometimes it doesnt work
file.delete();
//get url of app on server
String url = Main.this.getString(R.string.update_app_url);
//set downloadmanager
DownloadManager.Request request = new DownloadManager.Request(Uri.parse(url));
request.setDescription(Main.this.getString(R.string.notification_description));
request.setTitle(Main.this.getString(R.string.app_name));
//set destination
request.setDestinationUri(uri);
// get download service and enqueue file
final DownloadManager manager = (DownloadManager) getSystemService(Context.DOWNLOAD_SERVICE);
final long downloadId = manager.enqueue(request);
//set BroadcastReceiver to install app when .apk is downloaded
BroadcastReceiver onComplete = new BroadcastReceiver() {
public void onReceive(Context ctxt, Intent intent) {
Intent install = new Intent(Intent.ACTION_VIEW);
install.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
install.setDataAndType(uri,
manager.getMimeTypeForDownloadedFile(downloadId));
startActivity(install);
unregisterReceiver(this);
finish();
}
};
//register receiver for when .apk download is compete
registerReceiver(onComplete, new IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE));
Converting java.util.Data
to java.sql.Data
will loose hour, minute and second. So if it is possible, I suggest you use java.sql.Timestamp
like this:
prepareStatement.setTimestamp(1, new Timestamp(utilDate.getTime()));
For more info, you can check this question.
Use window.open
instead of window.location
to open a new window or tab (depending on browser settings).
Your fiddle does not work because there is no button
element to select. Try input[type=button]
or give the button an id
and use #buttonId
.
I tried all the option but was not able to get it working on Redhat platform. I did the following to make it work:-
yum install MySQL-python -y
Once the package was installed was able to import module as follows in the interpreter:-
>>> import MySQLdb
>>>
Set the DIV's z-index to one larger than the other DIVs. You'll also need to make sure the DIV has a position
other than static
set on it, too.
CSS:
#someDiv {
z-index:9;
}
Read more here: http://coding.smashingmagazine.com/2009/09/15/the-z-index-css-property-a-comprehensive-look/
I created an instance variable to check whether I'll show the placeholder or not:
BOOL showPlaceHolder;
UITextView * textView; // and also the textView
On viewDidLoad I set:
[self setPlaceHolder];
Here's what this does:
- (void)setPlaceholder
{
textView.text = NSLocalizedString(@"Type your question here", @"placeholder");
textView.textColor = [UIColor lightGrayColor];
self.showPlaceHolder = YES; //we save the state so it won't disappear in case you want to re-edit it
}
I also created a button to resign the keyboard. You don't have to do this but the cool thing here is that the placeholder is shown again if nothing was entered
- (void)textViewDidBeginEditing:(UITextView *)txtView
{
self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"Done" style:UIBarButtonItemStyleDone target:self action:@selector(resignKeyboard)];
if (self.showPlaceHolder == YES)
{
textView.textColor = [UIColor blackColor];
textView.text = @"";
self.showPlaceHolder = NO;
}
}
- (void)resignKeyboard
{
[textView resignFirstResponder];
//here if you created a button like I did to resign the keyboard, you should hide it
if (textView.text.length == 0) {
[self setPlaceholder];
}
}
You don't necessarily need to have the parameters inside the URL.
For instance, with:
$stateProvider
.state('home', {
url: '/',
views: {
'': {
templateUrl: 'home.html',
controller: 'MainRootCtrl'
},
},
params: {
foo: null,
bar: null
}
})
You will be able to send parameters to the state, using either:
$state.go('home', {foo: true, bar: 1});
// or
<a ui-sref="home({foo: true, bar: 1})">Go!</a>
Of course, if you reload the page once on the home
state, you will loose the state parameters, as they are not stored anywhere.
A full description of this behavior is documented here, under the params
row in the state(name, stateConfig)
section.
The awnser of @Alireza is totally correct, but you must notice that when using this code
var res = from element in list
group element by element.F1
into groups
select groups.OrderBy(p => p.F2).First();
which is simillar to this code because you ordering the list and then do the grouping so you are getting the first row of groups
var res = (from element in list)
.OrderBy(x => x.F2)
.GroupBy(x => x.F1)
.Select()
Now if you want to do something more complex like take the same grouping result but take the first element of F2 and the last element of F3 or something more custom you can do it by studing the code bellow
var res = (from element in list)
.GroupBy(x => x.F1)
.Select(y => new
{
F1 = y.FirstOrDefault().F1;
F2 = y.First().F2;
F3 = y.Last().F3;
});
So you will get something like
F1 F2 F3
-----------------------------------
Nima 1990 12
John 2001 2
Sara 2010 4
In Ruby 1.9.3 it is possible to use String.encode to "ignore" the invalid UTF-8 sequences. Here is a snippet that will work both in 1.8 (iconv) and 1.9 (String#encode) :
require 'iconv' unless String.method_defined?(:encode)
if String.method_defined?(:encode)
file_contents.encode!('UTF-8', 'UTF-8', :invalid => :replace)
else
ic = Iconv.new('UTF-8', 'UTF-8//IGNORE')
file_contents = ic.iconv(file_contents)
end
or if you have really troublesome input you can do a double conversion from UTF-8 to UTF-16 and back to UTF-8:
require 'iconv' unless String.method_defined?(:encode)
if String.method_defined?(:encode)
file_contents.encode!('UTF-16', 'UTF-8', :invalid => :replace, :replace => '')
file_contents.encode!('UTF-8', 'UTF-16')
else
ic = Iconv.new('UTF-8', 'UTF-8//IGNORE')
file_contents = ic.iconv(file_contents)
end
Another option might be numpy.asarray:
import numpy as np
a = ["1.1", "2.2", "3.2"]
b = np.asarray(a, dtype=np.float64, order='C')
For Python 2*:
print a, type(a), type(a[0])
print b, type(b), type(b[0])
resulting in:
['1.1', '2.2', '3.2'] <type 'list'> <type 'str'>
[1.1 2.2 3.2] <type 'numpy.ndarray'> <type 'numpy.float64'>
If you just want to execute the shell command in your c program, you could use,
#include <stdlib.h>
int system(const char *command);
In your case,
system("pwd");
The issue is that there isn't an executable file called "pwd" and I'm unable to execute "echo $PWD", since echo is also a built-in command with no executable to be found.
What do you mean by this? You should be able to find the mentioned packages in /bin/
sudo find / -executable -name pwd
sudo find / -executable -name echo
If you just want to determine whether a particular named lock is currently held, you can use IS_USED_LOCK
:
SELECT IS_USED_LOCK('foobar');
If some connection holds the lock, that connection's ID will be returned; otherwise, the result is NULL
.
I think you used somehow the right way to show the number only on the keyboard so better try the given line with xml in your edit text and it will work perfectly so here the code is-
android:inputType="number"
In case any doubt you can again ask to me i'll try to completely sort out your problem. Thanks
Create keystore file from command line :
Open Command line:
Microsoft Windows [Version 6.1.7601]
Copyright (c) 2009 Microsoft Corporation. All rights reserved
// (if you want to store keystore file at C:/ open command line with RUN AS ADMINISTRATOR)
C:\Windows\system32> keytool -genkey -v -keystore [your keystore file path]{C:/index.keystore} -alias [your_alias_name]{index} -keyalg RSA -keysize 2048 -validity 10000[in days]
Enter > It will prompt you for password > enter password (it will be invisible)
Enter keystore password:
Re-enter new password:
Enter > It will ask your detail.
What is your first and last name?
[Unknown]: {AB} // [Your Name / Name of Signer]
What is the name of your organizational unit?
[Unknown]: {Self} // [Your Unit Name]
What is the name of your organization?
[Unknown]: {Self} // [Your Organization Name]
What is the name of your City or Locality?
[Unknown]: {INDORE} // [Your City Name]
What is the name of your State or Province?
[Unknown]: {MP} //[Your State]
What is the two-letter country code for this unit?
[Unknown]: 91
Enter > Enter Y
Is CN=AB, OU=Self, O=Self, L=INDORE, ST=MP, C=91 correct?
[no]: Y
Enter > Enter password again.
Generating 2,048 bit RSA key pair and self-signed certificate (SHA256withRSA) with a validity of 10,000 days
for: CN=AB, OU=Self, O=Self, L=INDORE, ST=MP, C=91
Enter key password for <index> (RETURN if same as keystore password):
Re-enter new password:
[ Storing C:/index.keystore ]
Export your android package to .apk with your created keystore file
Right click on Package you want to export and select export
Select Export Android Application > Next
Next
Select Use Existing Keystore > Browse .keystore file > enter password > Next
Create keystore [.keystore/.jks]
in studio...
Click Build (ALT+B) > Generate Signed APK...
Click Create new..(ALT+C)
Browse Key store path (SHIFT+ENTER) > Select Path > Enter name > OK
Fill the detail about your .jks/keystore
file
Next
Your file
Enter Studio Master Password (You can RESET if you don't know) > OK
Select *Destination Folder * > Build Type
release : for publish on app store
debug : for debugging your application
Click Finish
Done !!!
Based on the answer of Mehrdad Afshari and the comment of Andrew Hanlon for a speedup, here is my take.
Important difference to the original task: A root node has ID==parentID.
class MyObject
{ // The actual object
public int ParentID { get; set; }
public int ID { get; set; }
}
class Node
{
public List<Node> Children = new List<Node>();
public Node Parent { get; set; }
public MyObject Source { get; set; }
}
List<Node> BuildTreeAndGetRoots(List<MyObject> actualObjects)
{
var lookup = new Dictionary<int, Node>();
var rootNodes = new List<Node>();
foreach (var item in actualObjects)
{
// add us to lookup
Node ourNode;
if (lookup.TryGetValue(item.ID, out ourNode))
{ // was already found as a parent - register the actual object
ourNode.Source = item;
}
else
{
ourNode = new Node() { Source = item };
lookup.Add(item.ID, ourNode);
}
// hook into parent
if (item.ParentID == item.ID)
{ // is a root node
rootNodes.Add(ourNode);
}
else
{ // is a child row - so we have a parent
Node parentNode;
if (!lookup.TryGetValue(item.ParentID, out parentNode))
{ // unknown parent, construct preliminary parent
parentNode = new Node();
lookup.Add(item.ParentID, parentNode);
}
parentNode.Children.Add(ourNode);
ourNode.Parent = parentNode;
}
}
return rootNodes;
}
The following should work nicely.
$(function() {
// Way 1
function doosomething()
{
//Doo something
}
// Way 2, equivalent to Way 1
var doosomething = function() {
// Doo something
}
$("div.class").click(doosomething);
$("div.secondclass").click(doosomething);
});
Basically, you are declaring your function in the same scope as your are using it (JavaScript uses Closures to determine scope).
Now, since functions in JavaScript behave like any other object, you can simply assign doosomething
as the function to call on click by using .click(doosomething);
Your function will not execute until you call it using doosomething()
(doosomething
without the ()
refers to the function but doesn't call it) or another function calls in (in this case, the click
handler).
I had a similar problem. I solved it using:
find dir_name '*.mp3' -exec cp -vuni '{}' "../dest_dir" ";"
The '{}'
and ";"
executes the copy on each file.
Please try this one..
create table client (
val_cli integer
,status varchar2(10)
);
---------------------
begin
insert into client
select 1, 'void' from dual
union all
select 4, 'void' from dual
union all
select 1, 'void' from dual
union all
select 6, 'void' from dual
union all
select 10, 'void' from dual;
end;
---------------------
select * from client;
---------------------
declare
counter integer := 0;
begin
for val in 1..10
loop
update client set status = 'updated' where val_cli = val;
if sql%rowcount = 0 then
dbms_output.put_line('no client with '||val||' val_cli.');
else
dbms_output.put_line(sql%rowcount||' client updated for '||val);
counter := counter + sql%rowcount;
end if;
end loop;
dbms_output.put_line('Number of total lines affected update operation: '||counter);
end;
---------------------
select * from client;
--------------------------------------------------------
Result will be like below:
2 client updated for 1
no client with 2 val_cli.
no client with 3 val_cli.
1 client updated for 4
no client with 5 val_cli.
1 client updated for 6
no client with 7 val_cli.
no client with 8 val_cli.
no client with 9 val_cli.
1 client updated for 10
Number of total lines affected update operation: 5
The advice isn't that you should never use True
, False
, or None
. It's just that you shouldn't use if x == True
.
if x == True
is silly because ==
is just a binary operator! It has a return value of either True
or False
, depending on whether its arguments are equal or not. And if condition
will proceed if condition
is true. So when you write if x == True
Python is going to first evaluate x == True
, which will become True
if x
was True
and False
otherwise, and then proceed if the result of that is true. But if you're expecting x
to be either True
or False
, why not just use if x
directly!
Likewise, x == False
can usually be replaced by not x
.
There are some circumstances where you might want to use x == True
. This is because an if
statement condition is "evaluated in Boolean context" to see if it is "truthy" rather than testing exactly against True
. For example, non-empty strings, lists, and dictionaries are all considered truthy by an if statement, as well as non-zero numeric values, but none of those are equal to True
. So if you want to test whether an arbitrary value is exactly the value True
, not just whether it is truthy, when you would use if x == True
. But I almost never see a use for that. It's so rare that if you do ever need to write that, it's worth adding a comment so future developers (including possibly yourself) don't just assume the == True
is superfluous and remove it.
Using x is True
instead is actually worse. You should never use is
with basic built-in immutable types like Booleans (True
, False
), numbers, and strings. The reason is that for these types we care about values, not identity. ==
tests that values are the same for these types, while is
always tests identities.
Testing identities rather than values is bad because an implementation could theoretically construct new Boolean values rather than go find existing ones, leading to you having two True
values that have the same value, but they are stored in different places in memory and have different identities. In practice I'm pretty sure True
and False
are always reused by the Python interpreter so this won't happen, but that's really an implementation detail. This issue trips people up all the time with strings, because short strings and literal strings that appear directly in the program source are recycled by Python so 'foo' is 'foo'
always returns True
. But it's easy to construct the same string 2 different ways and have Python give them different identities. Observe the following:
>>> stars1 = ''.join('*' for _ in xrange(100))
>>> stars2 = '*' * 100
>>> stars1 is stars2
False
>>> stars1 == stars2
True
EDIT: So it turns out that Python's equality on Booleans is a little unexpected (at least to me):
>>> True is 1
False
>>> True == 1
True
>>> True == 2
False
>>> False is 0
False
>>> False == 0
True
>>> False == 0.0
True
The rationale for this, as explained in the notes when bools were introduced in Python 2.3.5, is that the old behaviour of using integers 1 and 0 to represent True and False was good, but we just wanted more descriptive names for numbers we intended to represent truth values.
One way to achieve that would have been to simply have True = 1
and False = 0
in the builtins; then 1 and True really would be indistinguishable (including by is
). But that would also mean a function returning True
would show 1
in the interactive interpreter, so what's been done instead is to create bool
as a subtype of int
. The only thing that's different about bool
is str
and repr
; bool
instances still have the same data as int
instances, and still compare equality the same way, so True == 1
.
So it's wrong to use x is True
when x
might have been set by some code that expects that "True is just another way to spell 1", because there are lots of ways to construct values that are equal to True
but do not have the same identity as it:
>>> a = 1L
>>> b = 1L
>>> c = 1
>>> d = 1.0
>>> a == True, b == True, c == True, d == True
(True, True, True, True)
>>> a is b, a is c, a is d, c is d
(False, False, False, False)
And it's wrong to use x == True
when x
could be an arbitrary Python value and you only want to know whether it is the Boolean value True
. The only certainty we have is that just using x
is best when you just want to test "truthiness". Thankfully that is usually all that is required, at least in the code I write!
A more sure way would be x == True and type(x) is bool
. But that's getting pretty verbose for a pretty obscure case. It also doesn't look very Pythonic by doing explicit type checking... but that really is what you're doing when you're trying to test precisely True
rather than truthy; the duck typing way would be to accept truthy values and allow any user-defined class to declare itself to be truthy.
If you're dealing with this extremely precise notion of truth where you not only don't consider non-empty collections to be true but also don't consider 1 to be true, then just using x is True
is probably okay, because presumably then you know that x
didn't come from code that considers 1 to be true. I don't think there's any pure-python way to come up with another True
that lives at a different memory address (although you could probably do it from C), so this shouldn't ever break despite being theoretically the "wrong" thing to do.
And I used to think Booleans were simple!
End Edit
In the case of None
, however, the idiom is to use if x is None
. In many circumstances you can use if not x
, because None
is a "falsey" value to an if
statement. But it's best to only do this if you're wanting to treat all falsey values (zero-valued numeric types, empty collections, and None
) the same way. If you are dealing with a value that is either some possible other value or None
to indicate "no value" (such as when a function returns None
on failure), then it's much better to use if x is None
so that you don't accidentally assume the function failed when it just happened to return an empty list, or the number 0.
My arguments for using ==
rather than is
for immutable value types would suggest that you should use if x == None
rather than if x is None
. However, in the case of None
Python does explicitly guarantee that there is exactly one None
in the entire universe, and normal idiomatic Python code uses is
.
Regarding whether to return None
or raise an exception, it depends on the context.
For something like your get_attr
example I would expect it to raise an exception, because I'm going to be calling it like do_something_with(get_attr(file))
. The normal expectation of the callers is that they'll get the attribute value, and having them get None
and assume that was the attribute value is a much worse danger than forgetting to handle the exception when you can actually continue if the attribute can't be found. Plus, returning None
to indicate failure means that None
is not a valid value for the attribute. This can be a problem in some cases.
For an imaginary function like see_if_matching_file_exists
, that we provide a pattern to and it checks several places to see if there's a match, it could return a match if it finds one or None
if it doesn't. But alternatively it could return a list of matches; then no match is just the empty list (which is also "falsey"; this is one of those situations where I'd just use if x
to see if I got anything back).
So when choosing between exceptions and None
to indicate failure, you have to decide whether None
is an expected non-failure value, and then look at the expectations of code calling the function. If the "normal" expectation is that there will be a valid value returned, and only occasionally will a caller be able to work fine whether or not a valid value is returned, then you should use exceptions to indicate failure. If it will be quite common for there to be no valid value, so callers will be expecting to handle both possibilities, then you can use None
.
remove global reference
npm uninstall -g angular-cli
npm cache clean
This option was introduced in order to remove the need to deploy very large PIAs (Primary Interop Assemblies) for interop.
It simply embeds the managed bridging code used that allows you to talk to unmanaged assemblies, but instead of embedding it all it only creates the stuff you actually use in code.
Read more in Scott Hanselman's blog post about it and other VS improvements here.
As for whether it is advised or not, I'm not sure as I don't need to use this feature. A quick web search yields a few leads:
The only risk of turning them all to false is more deployment concerns with PIA files and a larger deployment if some of those files are large.
You cannot use IF control block OUTSIDE of functions. So that affects both of your queries.
Turn the EXISTS clause into a subquery instead within an IF function
SELECT IF( EXISTS(
SELECT *
FROM gdata_calendars
WHERE `group` = ? AND id = ?), 1, 0)
In fact, booleans are returned as 1 or 0
SELECT EXISTS(
SELECT *
FROM gdata_calendars
WHERE `group` = ? AND id = ?)
None: The file is not included in the project output group and is not compiled in the build process. An example is a text file that contains documentation, such as a Readme file.
Compile: The file is compiled into the build output. This setting is used for code files.
Content: Allows you to retrieve a file (in the same directory as the assembly) as a stream via Application.GetContentStream(URI). For this method to work, it needs a AssemblyAssociatedContentFile custom attribute which Visual Studio graciously adds when you mark a file as "Content"
Embedded resource: Embeds the file in an exclusive assembly manifest resource.
Resource (WPF only): Embeds the file in a shared (by all files in the assembly with similar setting) assembly manifest resource named AppName.g.resources.
Page (WPF only): Used to compile a xaml
file into baml
. The baml
is then embedded with the same technique as Resource
(i.e. available as `AppName.g.resources)
ApplicationDefinition (WPF only): Mark the XAML/class file that defines your application. You specify the code-behind with the x:Class="Namespace.ClassName" and set the startup form/page with StartupUri="Window1.xaml"
SplashScreen (WPF only): An image that is marked as SplashScreen
is shown automatically when an WPF application loads, and then fades
DesignData: Compiles XAML viewmodels so that usercontrols can be previewed with sample data in Visual Studio (uses mock types)
DesignDataWithDesignTimeCreatableTypes: Compiles XAML viewmodels so that usercontrols can be previewed with sample data in Visual Studio (uses actual types)
EntityDeploy: (Entity Framework): used to deploy the Entity Framework artifacts
CodeAnalysisDictionary: An XML file containing custom word dictionary for spelling rules
I had the same problem, I think in Chart.js 2.x.x the approach is slightly different like below.
ticks: {
callback: function(label, index, labels) {
return label/1000+'k';
}
}
More in details
var options = {
scales: {
yAxes: [
{
ticks: {
callback: function(label, index, labels) {
return label/1000+'k';
}
},
scaleLabel: {
display: true,
labelString: '1k = 1000'
}
}
]
}
}
import has from 'lodash/has';
is better because lodash holds all it's functions in a single file, so rather than import the whole 'lodash' library at 100k, it's better to just import lodash's has
function which is maybe 2k.
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
.
The first example will actually embed HTML within the div
whereas the second example will escape the text by means of replacing element-related characters with their corresponding character entities so that it displays literally (i.e. the HTML will be displayed not rendered).
Though this question has an answer, I resolved it differently when I had the same issue. I had this issue when I copied folders with the option Create Folder references
; then the above solution of adding the folder to the build_path worked.
But when the folder was added using the Create groups for any added folder
option, the headers were picked up automatically.
Java has nothing of that sort. Why not just do the following?
public static boolean isBetween(int x, int lower, int upper) {
return lower <= x && x <= upper;
}
if (isBetween(num, 1, 5)) {
System.out.println("testing case 1 to 5");
} else if (isBetween(num, 6, 10)) {
System.out.println("testing case 6 to 10");
}
First of all, write the following code:
#include <Mmsystem.h>
#include <mciapi.h>
//these two headers are already included in the <Windows.h> header
#pragma comment(lib, "Winmm.lib")
To open *.mp3:
mciSendString("open \"*.mp3\" type mpegvideo alias mp3", NULL, 0, NULL);
To play *.mp3:
mciSendString("play mp3", NULL, 0, NULL);
To play and wait until the *.mp3 has finished playing:
mciSendString("play mp3 wait", NULL, 0, NULL);
To replay (play again from start) the *.mp3:
mciSendString("play mp3 from 0", NULL, 0, NULL);
To replay and wait until the *.mp3 has finished playing:
mciSendString("play mp3 from 0 wait", NULL, 0, NULL);
To play the *.mp3 and replay it every time it ends like a loop:
mciSendString("play mp3 repeat", NULL, 0, NULL);
If you want to do something when the *.mp3 has finished playing, then you need to RegisterClassEx
by the WNDCLASSEX
structure, CreateWindowEx
and process it's messages with the GetMessage, TranslateMessage and DispatchMessage functions in a while
loop and call:
mciSendString("play mp3 notify", NULL, 0, hwnd); //hwnd is an handle to the window returned from CreateWindowEx. If this doesn't work, then replace the hwnd with MAKELONG(hwnd, 0).
In the window procedure, add the case MM_MCINOTIFY:
The code in there will be executed when the mp3 has finished playing.
But if you program a Console Application and you don't deal with windows, then you can CreateThread
in suspend state by specifying the CREATE_SUSPENDED
flag in the dwCreationFlags
parameter and keep the return value in a static
variable and call it whatever you want. For instance, I call it mp3. The type of this static
variable is HANDLE
of course.
Here is the ThreadProc
for the lpStartAddress
of this thread:
DWORD WINAPI MP3Proc(_In_ LPVOID lpParameter) //lpParameter can be a pointer to a structure that store data that you cannot access outside of this function. You can prepare this structure before `CreateThread` and give it's address in the `lpParameter`
{
Data *data = (Data*)lpParameter; //If you call this structure Data, but you can call it whatever you want.
while (true)
{
mciSendString("play mp3 from 0 wait", NULL, 0, NULL);
//Do here what you want to do when the mp3 playback is over
SuspendThread(GetCurrentThread()); //or the handle of this thread that you keep in a static variable instead
}
}
All what you have to do now is to ResumeThread(mp3);
every time you want to replay your mp3 and something will happen every time it finishes.
You can #define play_my_mp3 ResumeThread(mp3);
to make your code more readable.
Of course you can remove the while (true)
, SuspendThread
and the from 0 codes, if you want to play your mp3 file only once and do whatever you want when it is over.
If you only remove the SuspendThread
call, then the sound will play over and over again and do something whenever it is over. This is equivalent to:
mciSendString("play mp3 repeat notify", NULL, 0, hwnd); //or MAKELONG(hwnd, 0) instead
in windows.
To pause the *.mp3 in middle:
mciSendString("pause mp3", NULL, 0, NULL);
and to resume it:
mciSendString("resume mp3", NULL, 0, NULL);
To stop it in middle:
mciSendString("stop mp3", NULL, 0, NULL);
Note that you cannot resume a sound that has been stopped, but only paused, but you can replay it by carrying out the play command. When you're done playing this *.mp3, don't forget to:
mciSendString("close mp3", NULL, 0, NULL);
All these actions also apply to (work with) wave files too, but with wave files, you can use "waveaudio" instead of "mpegvideo". Also you can just play them directly without opening them:
PlaySound("*.wav", GetModuleHandle(NULL), SND_FILENAME);
If you don't want to specify an handle to a module:
sndPlaySound("*.wav", SND_FILENAME);
If you don't want to wait until the playback is over:
PlaySound("*.wav", GetModuleHandle(NULL), SND_FILENAME | SND_ASYNC);
//or
sndPlaySound("*.wav", SND_FILENAME | SND_ASYNC);
To play the wave file over and over again:
PlaySound("*.wav", GetModuleHandle(NULL), SND_FILENAME | SND_ASYNC | SND_LOOP);
//or
sndPlaySound("*.wav", SND_FILENAME | SND_ASYNC | SND_LOOP);
Note that you must specify both the SND_ASYNC
and SND_LOOP
flags, because you never going to wait until a sound, that repeats itself countless times, is over!
Also you can fopen
the wave file and copy all it's bytes to a buffer (an enormous/huge (very big) array of bytes) with the fread
function and then:
PlaySound(buffer, GetModuleHandle(NULL), SND_MEMORY);
//or
PlaySound(buffer, GetModuleHandle(NULL), SND_MEMORY | SND_ASYNC);
//or
PlaySound(buffer, GetModuleHandle(NULL), SND_MEMORY | SND_ASYNC | SND_LOOP);
//or
sndPlaySound(buffer, SND_MEMORY);
//or
sndPlaySound(buffer, SND_MEMORY | SND_ASYNC);
//or
sndPlaySound(buffer, SND_MEMORY | SND_ASYNC | SND_LOOP);
Either OpenFile
or CreateFile
or CreateFile2
and either ReadFile
or ReadFileEx
functions can be used instead of fopen
and fread
functions.
Hope this fully answers perfectly your question.
There are padding built into various classes.
For example:
A asp.net web forms app:
<asp:CheckBox ID="chkShowDeletedServers" runat="server" AutoPostBack="True" Text="Show Deleted" />
this code above would place the Text of "Show Deleted" too close to the checkbox to what I see at nice to look at.
However with bootstrap
<div class="checkbox-inline">
<asp:CheckBox ID="chkShowDeletedServers" runat="server" AutoPostBack="True" Text="Show Deleted" />
</div>
This created the space, if you don't want the text bold, that class=checkbox
Bootstrap is very flexible, so in this case I don't need a hack, but sometimes you need to.
Have you tried layerGroup
yet?
Docs here https://leafletjs.com/reference-1.2.0.html#layergroup
Just create a layer, add all marker to this layer, then you can find and destroy marker easily.
var markers = L.layerGroup()
const marker = L.marker([], {})
markers.addLayer(marker)
I haven't checked the maths, but I suspect that computing S(n^2)
in the same pass as we compute S(n)
would provide enough info to get two missing numbers, Do S(n^3)
as well if there are three, and so on.
JLRishe's answer is correct, so I simply use this in my event handler:
if (event.target instanceof Element) { /*...*/ }
It is used in the new short hand for/loop
final List<String> list = new ArrayList<String>();
for (final String s : list)
{
System.out.println(s);
}
and the ternary operator
list.isEmpty() ? true : false;
Look at how the current Object Results are created. Here is the BadRequestObjectResult. Just an extension of the ObjectResult with a value and StatusCode.
I created a TimeoutExceptionObjectResult just the same way for 408.
/// <summary>
/// An <see cref="ObjectResult"/> that when executed will produce a Request Timeout (408) response.
/// </summary>
[DefaultStatusCode(DefaultStatusCode)]
public class TimeoutExceptionObjectResult : ObjectResult
{
private const int DefaultStatusCode = StatusCodes.Status408RequestTimeout;
/// <summary>
/// Creates a new <see cref="TimeoutExceptionObjectResult"/> instance.
/// </summary>
/// <param name="error">Contains the errors to be returned to the client.</param>
public TimeoutExceptionObjectResult(object error)
: base(error)
{
StatusCode = DefaultStatusCode;
}
}
Client:
if (ex is TimeoutException)
{
return new TimeoutExceptionObjectResult("The request timed out.");
}
Also set the field to disabled when you disable the datePicker e.g
$("input").prop('disabled', true);
To stop the image being clickable you could unbind the click event on that
$('img#<id or class ref>').unbind('click');
You need to put arguments before my_script.R
and use -
on the arguments, e.g.
R CMD BATCH -blabla my_script.R
commandArgs()
will receive -blabla
as a character string in this case. See the help for details:
$ R CMD BATCH --help
Usage: R CMD BATCH [options] infile [outfile]
Run R non-interactively with input from infile and place output (stdout
and stderr) to another file. If not given, the name of the output file
is the one of the input file, with a possible '.R' extension stripped,
and '.Rout' appended.
Options:
-h, --help print short help message and exit
-v, --version print version info and exit
--no-timing do not report the timings
-- end processing of options
Further arguments starting with a '-' are considered as options as long
as '--' was not encountered, and are passed on to the R process, which
by default is started with '--restore --save --no-readline'.
See also help('BATCH') inside R.
ParseExact is told the format of the date it is expected to parse, not the format you wish to get out.
$invoice = '01-Jul-16'
[datetime]::parseexact($invoice, 'dd-MMM-yy', $null)
If you then wish to output a date string:
[datetime]::parseexact($invoice, 'dd-MMM-yy', $null).ToString('yyyy-MM-dd')
Chris
You're a little confused about how objects work in JavaScript. The object's reference is the value of the variable. There is no unserialized value. When you create an object, its structure is stored in memory and the variable it was assigned to holds a reference to that structure.
Even if what you're asking was provided in some sort of easy, native language construct it would still technically be cloning.
JavaScript is really just pass-by-value... it's just that the value passed might be a reference to something.
public void run(final String scriptSrc) {
webView.post(new Runnable() {
@Override
public void run() {
webView.loadUrl("javascript:" + scriptSrc);
}
});
}
rtsp protocol did not work for me. mjpeg worked first try. I assume it is built into my camera (Dlink DCS 900).
Syntax found here: http://answers.opencv.org/question/133/how-do-i-access-an-ip-camera/
I did not need to compile OpenCV with ffmpg support.
See the documentation on ?merge
, which states:
By default the data frames are merged on the columns with names they both have,
but separate specifications of the columns can be given by by.x and by.y.
This clearly implies that merge
will merge data frames based on more than one column. From the final example given in the documentation:
x <- data.frame(k1=c(NA,NA,3,4,5), k2=c(1,NA,NA,4,5), data=1:5)
y <- data.frame(k1=c(NA,2,NA,4,5), k2=c(NA,NA,3,4,5), data=1:5)
merge(x, y, by=c("k1","k2")) # NA's match
This example was meant to demonstrate the use of incomparables
, but it illustrates merging using multiple columns as well. You can also specify separate columns in each of x
and y
using by.x
and by.y
.
There is no standardized way to do that. For windows the functionality is provided in the DbgHelp library
You're not going to "simply" understand something complex.
WSDL is an XML-based language for describing a web service. It describes the messages, operations, and network transport information used by the service. These web services usually use SOAP, but may use other protocols.
A WSDL is readable by a program, and so may be used to generate all, or part of the client code necessary to call the web service. This is what it means to call SOAP-based web services "self-describing".
REST is not related to WSDL at all.
Shubham's answer explains very well. This answer is addition to it as per to avoid some pitfalls and refactoring to a more readable syntax
Pitfall : There is common misconception in rendering array of objects especially if there is an update or delete action performed on data. Use case would be like deleting an item from table row. Sometimes when row which is expected to be deleted, does not get deleted and instead other row gets deleted.
To avoid this, use key
prop in root element which is looped over in JSX tree of .map()
. Also adding React's Fragment
will avoid adding another element in between of ul
and li
when rendered via calling method.
state = {
userData: [
{ id: '1', name: 'Joe', user_type: 'Developer' },
{ id: '2', name: 'Hill', user_type: 'Designer' }
]
};
deleteUser = id => {
// delete operation to remove item
};
renderItems = () => {
const data = this.state.userData;
const mapRows = data.map((item, index) => (
<Fragment key={item.id}>
<li>
{/* Passing unique value to 'key' prop, eases process for virtual DOM to remove specific element and update HTML tree */}
<span>Name : {item.name}</span>
<span>User Type: {item.user_type}</span>
<button onClick={() => this.deleteUser(item.id)}>
Delete User
</button>
</li>
</Fragment>
));
return mapRows;
};
render() {
return <ul>{this.renderItems()}</ul>;
}
Important : Decision to use which value should we pass to key
prop also matters as common way is to use index
parameter provided by .map()
.
TLDR; But there's a drawback to it and avoid it as much as possible and use any unique id
from data which is being iterated such as item.id
. There's a good article on this - https://medium.com/@robinpokorny/index-as-a-key-is-an-anti-pattern-e0349aece318
We can handle the different windows by moving between named windows using the “switchTo” method:
driver.switch_to.window("windowName")
<a href="somewhere.html" target="windowName">Click here to open a new window</a>
Alternatively, you can pass a “window handle” to the “switchTo().window()” method. Knowing this, it’s possible to iterate over every open window like so:
for handle in driver.window_handles:
driver.switch_to.window(handle)
Given
volumes:
- /dir/on/host:/var/www/html
if /dir/on/host
doesn't exist, it is created on the host and the empty content is mounted in the container at /var/www/html
. Whatever content you had before in /var/www/html
inside the container is inaccessible, until you unmount the volume; the new mount is hiding the old content.
Just download it and save in your network location.
You can get it form the below.
reference: www.thedeveloperblog.com
@FurkanO has provided the right approach. Though to go for a more cleaner approach (es6 way) you can do something like this
[{
name: 'Sam',
email: '[email protected]'
},
{
name: 'Ash',
email: '[email protected]'
}
].map( ( {name, email} ) => {
return <p key={email}>{name} - {email}</p>
})
Cheers!
Another option is to double XOR the value with itself:
var i = 12.34;
console.log('i = ' + i);
console.log('i ? i ? i = ' + (i ^ i ^ i));
This will output:
i = 12.34
i ? i ? i = 12
For Android Studio 3.1.2:
Tools>> SDK Manager>> Edit "Android SDK Location" to new location
After that, Set environment variable $ANDROID_HOME to your new SDK location
You are passing wrong mode to you view. Your view is looking for @model IEnumerable<Standings.Models.Teams>
and you are passing var model = tm.Name.ToList();
name list. You have to pass list of Teams.
You have to pass following model
var model = new List<Teams>();
model.Add(new Teams { Name = new List<string>(){"Sky","ABC"}});
model.Add(new Teams { Name = new List<string>(){"John","XYZ"} });
return View(model);
For a really thorough explanation and workaround, not only for indexOf but other array functions missing in IE check out the StackOverflow question Fixing JavaScript Array functions in Internet Explorer (indexOf, forEach, etc.)
In Chrome, there is "Task Manager", accessible via Shift+ESC or through
Menu → More Tools → Task Manager
You can select your page task and end it by pressing "End Process" button.
This is how I do it if I need a form displayed for each item, and inputs for various properties. Really depends on what I'm trying to do though.
ViewModel looks like this:
public class MyViewModel
{
public List<Person> Persons{get;set;}
}
View(with BeginForm of course):
@model MyViewModel
@for( int i = 0; i < Model.Persons.Count(); ++i)
{
@Html.HiddenFor(m => m.Persons[i].PersonId)
@Html.EditorFor(m => m.Persons[i].FirstName)
@Html.EditorFor(m => m.Persons[i].LastName)
}
Action:
[HttpPost]public ViewResult(MyViewModel vm)
{
...
Note that on post back only properties which had inputs available will have values. I.e., if Person had a .SSN property, it would not be available in the post action because it wasn't a field in the form.
Note that the way MVC's model binding works, it will only look for consecutive ID's. So doing something like this where you conditionally hide an item will cause it to not bind any data after the 5th item, because once it encounters a gap in the IDs, it will stop binding. Even if there were 10 people, you would only get the first 4 on the postback:
@for( int i = 0; i < Model.Persons.Count(); ++i)
{
if(i != 4)//conditionally hide 5th item,
{ //but BUG occurs on postback, all items after 5th will not be bound to the the list
@Html.HiddenFor(m => m.Persons[i].PersonId)
@Html.EditorFor(m => m.Persons[i].FirstName)
@Html.EditorFor(m => m.Persons[i].LastName)
}
}
You shall proceed with ent.delete(0,"end")
instead of using 'END', use 'end' inside quotation.
secret = randrange(1,100)
print(secret)
def res(real, secret):
if secret==eval(real):
showinfo(message='that is right!')
real.delete(0, END)
def guess():
ge = Tk()
ge.title('guessing game')
Label(ge, text="what is your guess:").pack(side=TOP)
ent = Entry(ge)
ent.pack(side=TOP)
btn=Button(ge, text="Enter", command=lambda: res(ent.get(),secret))
btn.pack(side=LEFT)
ge.mainloop()
This shall solve your problem
It will be available using .NET 6: https://devblogs.microsoft.com/dotnet/announcing-net-6-preview-1/
But you can already create WinForms applications using netcore 3.1 and net 5 (at least in Visual Studio 2019 16.8.4+).
I find an library socket.io to test asynchronous logic. It looks simple and brief way using LinkedBlockingQueue. Here is example:
@Test(timeout = TIMEOUT)
public void message() throws URISyntaxException, InterruptedException {
final BlockingQueue<Object> values = new LinkedBlockingQueue<Object>();
socket = client();
socket.on(Socket.EVENT_CONNECT, new Emitter.Listener() {
@Override
public void call(Object... objects) {
socket.send("foo", "bar");
}
}).on(Socket.EVENT_MESSAGE, new Emitter.Listener() {
@Override
public void call(Object... args) {
values.offer(args);
}
});
socket.connect();
assertThat((Object[])values.take(), is(new Object[] {"hello client"}));
assertThat((Object[])values.take(), is(new Object[] {"foo", "bar"}));
socket.disconnect();
}
Using LinkedBlockingQueue take API to block until to get result just like synchronous way. And set timeout to avoid assuming too much time to wait the result.
While trying out the final suggestion above, I discovered an even simpler solution. All I had to do was cache the process handle. As soon as I did that, $process.ExitCode worked correctly. If I didn't cache the process handle, $process.ExitCode was null.
example:
$proc = Start-Process $msbuild -PassThru
$handle = $proc.Handle # cache proc.Handle
$proc.WaitForExit();
if ($proc.ExitCode -ne 0) {
Write-Warning "$_ exited with status code $($proc.ExitCode)"
}
Oracle JavaFX from Java SE supports only OS X (macOS), GNU/Linux and Microsoft Windows. On these platforms, JavaFX applications are typically run on JVM from Java SE or OpenJDK.
There is also a JavaFXPorts project, which is an open-source project sponsored by a third-party. It aims to port JavaFX library to Android and iOS.
On Android, this library can be used like any other Java library; the JVM bytecode is compiled to Dalvik bytecode. It's what people mean by saying that "Android runs Java".
On iOS, situation is a bit more complex, as neither Java SE nor OpenJDK supports Apple mobile devices. Till recently, the only sensible option was to use RoboVM ahead-of-time Java compiler for iOS. Unfortunately, on 15 April 2015, RoboVM project was shut down.
One possible alternative is Intel's Multi-OS Engine. Till recently, it was a proprietary technology, but on 11 August 2016 it was open-sourced. Although it can be possible to compile an iOS JavaFX app using JavaFXPorts' JavaFX implementation, there is no evidence for that so far. As you can see, the situation is dynamically changing, and this answer will be hopefully updated when new information is available.
With Windows Phone it's simple: there is no JavaFX support of any kind.
Just a basic example:
RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
params.addRule(RelativeLayout.ALIGN_PARENT_LEFT, RelativeLayout.TRUE);
Button button1;
button1.setLayoutParams(params);
params = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
params.addRule(RelativeLayout.RIGHT_OF, button1.getId());
Button button2;
button2.setLayoutParams(params);
As you can see, this is what you have to do:
RelativeLayout.LayoutParams
object.addRule(int)
or addRule(int, int)
to set the rules. The first method is used to add rules that don't require values.You could also come up with something like this!
def get_logger(name=None):
default = "__app__"
formatter = logging.Formatter('%(levelname)s: %(asctime)s %(funcName)s(%(lineno)d) -- %(message)s',
datefmt='%Y-%m-%d %H:%M:%S')
log_map = {"__app__": "app.log", "__basic_log__": "file1.log", "__advance_log__": "file2.log"}
if name:
logger = logging.getLogger(name)
else:
logger = logging.getLogger(default)
fh = logging.FileHandler(log_map[name])
fh.setFormatter(formatter)
logger.addHandler(fh)
logger.setLevel(logging.DEBUG)
return logger
Now you could use multiple loggers in same module and across whole project if the above is defined in a separate module and imported in other modules were logging is required.
a=get_logger("__app___")
b=get_logger("__basic_log__")
a.info("Starting logging!")
b.debug("Debug Mode")
According to the Apple Human Interface Guidelines:
@1x : about 25 x 25 (max: 48 x 32)
@2x : about 50 x 50 (max: 96 x 64)
@3x : about 75 x 75 (max: 144 x 96)
Simply create an input element and trigger the click.
var input = document.createElement('input');
input.type = 'file';
input.click();
This is the most basic, pop a select-a-file dialog, but its no use for anything without handling the selected file...
Adding an onchange
event to the newly created input would allow us to do stuff once the user has selected the file.
var input = document.createElement('input');
input.type = 'file';
input.onchange = e => {
var file = e.target.files[0];
}
input.click();
At the moment we have the file variable storing various information :
file.name // the file's name including extension
file.size // the size in bytes
file.type // file type ex. 'application/pdf'
Great!
In order to get to the actual content of the file, for various reasons. place an image, load into canvas, create a window with Base64 data url, etc. we would need to use the FileReader
API
We would create an instance of the FileReader, and load our user selected file reference to it.
var input = document.createElement('input');
input.type = 'file';
input.onchange = e => {
// getting a hold of the file reference
var file = e.target.files[0];
// setting up the reader
var reader = new FileReader();
reader.readAsText(file,'UTF-8');
// here we tell the reader what to do when it's done reading...
reader.onload = readerEvent => {
var content = readerEvent.target.result; // this is the content!
console.log( content );
}
}
input.click();
Trying pasting the above code into your devtool's console window, it should produce a select-a-file dialog, after selecting the file, the console should now print the contents of the file.
Let's try to create a file select dialog to change stackoverflows background image to something more spicy...
var input = document.createElement('input');
input.type = 'file';
input.onchange = e => {
// getting a hold of the file reference
var file = e.target.files[0];
// setting up the reader
var reader = new FileReader();
reader.readAsDataURL(file); // this is reading as data url
// here we tell the reader what to do when it's done reading...
reader.onload = readerEvent => {
var content = readerEvent.target.result; // this is the content!
document.querySelector('#content').style.backgroundImage = 'url('+ content +')';
}
}
input.click();
open devtools, and paste the above code into console window, this should pop a select-a-file dialog, upon selecting an image, stackoverflows content box background should change to the image selected.
Cheers!
Option #1: Use ProvidePlugin
Add the ProvidePlugin to the plugins array in both build/webpack.dev.conf.js
and build/webpack.prod.conf.js
so that jQuery becomes globally available to all your modules:
plugins: [
// ...
new webpack.ProvidePlugin({
$: 'jquery',
jquery: 'jquery',
'window.jQuery': 'jquery',
jQuery: 'jquery'
})
]
Option #2: Use Expose Loader module for webpack
As @TremendusApps suggests in his answer, add the Expose Loader package:
npm install expose-loader --save-dev
Use in your entry point main.js
like this:
import 'expose?$!expose?jQuery!jquery'
// ...
I know I'm late to the game, but you can just do ?id=14&like=like
by using http build query as follows:
http_build_query(array_merge($_GET, array("like"=>"like")))
Whatever GET parameters you had will still be there and if like
was a parameter before it will be overwritten, otherwise it will be included at the end.
If you are using MAC Catalina you need to update the .zshrc file instead of .bash_profile or .profile
If you want a formula to do it then:
=IF(ISNUMBER(SEARCH("*texts are *",A1)),LEFT(A1,FIND("texts are ",A1) + 9) & "WORD",A1)
This will do it. Change `"WORD" To the word you want.
There's no way to evaluate multiple values in one 'case'. You could either use an if statement (as others have suggested) or call a method which evaluates the range that the integer belongs to and returns a value which represents that range (such as "minor", "adult", etc.), then evaluate this returned value in the switch statement. Of course, you'd probably still be using an if statement in the custom method.
for who looks for more options here is a one
// Set text within a `TextView`
TextView textView = (TextView) findViewById(R.id.textView);
textView.setText("Hey @sarah, where did @jim go? #lost");
// Style clickable spans based on pattern
new PatternEditableBuilder().
addPattern(Pattern.compile("\\@(\\w+)"), Color.BLUE,
new PatternEditableBuilder.SpannableClickedListener() {
@Override
public void onSpanClicked(String text) {
Toast.makeText(MainActivity.this, "Clicked username: " + text,
Toast.LENGTH_SHORT).show();
}
}).into(textView);
RESOURCE : CodePath
you can use pass inside if statement.
Just to extend the @Joseph's answer:
After applying these commands your global .gitconfig
file will have the following lines (to speed up the process you can just copy them in the file):
[merge]
tool = kdiff3
[mergetool "kdiff3"]
path = C:/Program Files/KDiff3/kdiff3.exe
trustExitCode = false
[diff]
guitool = kdiff3
[difftool "kdiff3"]
path = C:/Program Files/KDiff3/kdiff3.exe
trustExitCode = false
try with this.
Protected Sub SqlDataSource_Selecting(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.SqlDataSourceSelectingEventArgs) Handles SqlDataSource.Selecting
e.Command.CommandText = "SELECT [ImageID],[ImagePath] FROM [TblImage] where IsActive = 1"
End Sub
Here's the easy way to get access to the web.config settings anywhere in your C# project.
Properties.Settings.Default
Use case:
litBodyText.Text = Properties.Settings.Default.BodyText;
litFootText.Text = Properties.Settings.Default.FooterText;
litHeadText.Text = Properties.Settings.Default.HeaderText;
Web.config file:
<applicationSettings>
<myWebSite.Properties.Settings>
<setting name="BodyText" serializeAs="String">
<value>
<h1>Hello World</h1>
<p>
Ipsum Lorem
</p>
</value>
</setting>
<setting name="HeaderText" serializeAs="String">
My header text
<value />
</setting>
<setting name="FooterText" serializeAs="String">
My footer text
<value />
</setting>
</myWebSite.Properties.Settings>
</applicationSettings>
No need for special routines - everything is right there already. I'm surprised that no one has this answer for the best way to read settings from your web.config file.
Use the ALTER USER
command rather than trying to update a USER
row. Keep in mind that there may be more than one 'root' user, because user entities are qualified also by the machine from which they connect
https://dev.mysql.com/doc/refman/5.7/en/alter-user.html
For example.
ALTER USER 'root'@'localhost' IDENTIFIED BY 'new-password'
ALTER USER 'root'@'*' IDENTIFIED BY 'new-password'
A simpler way to think about it, perhaps: when main returns, your process will not exit if there are non-daemon threads still running.
A bit of advice: Clean shutdown is easy to get wrong when threads and synchronization are involved - if you can avoid it, do so. Use daemon threads whenever possible.
If you are doing something like writing HTML and Javascript in a code editor on your personal computer, and testing the output in your browser, you will probably get error messages about Cross Origin Requests
. Your browser will render HTML and run Javascript, jQuery, angularJs in your browser without needing a server set up. But many web browsers are programed to watch for cross site attacks, and will block requests. You don't want just anyone being able to read your hard drive from your web browser. You can create a fully functioning web page using Notepad++ that will run Javascript, and frameworks like jQuery and angularJs; and test everything just by using the Notepad++ menu item, RUN, LAUNCH IN FIREFOX
. That's a nice, easy way to start creating a web page, but when you start creating anything more than layout, css and simple page navigation, you need a local server set up on your machine.
Get your IP address:
Command Prompt
as Administrator
. Right click the Command Prompt
menu item and look for Run As Administrator
ipconfig
and hit Enter.If you don't have Python, download and install it.
Using the 'Command Prompt' you must go to the folder where the files are that you want to serve as a webpage.
python -m SimpleHTTPServer port
Where 'port' is the number of the port you want, for example python -m SimpleHTTPServer 1337
http://your IP address:port
http://xxx.xxx.x.x:1337
or http://xx.xxx.xxx.xx:8000
for the defaultYou can install Apache, PHP, Python, SQL, Debuggers etc. all separately on your machine, and then spend lots of time trying to figure out how to make them all work together, or look for a solution that combines all those things.
I like using XAMPP with NetBeans IDE. You can also install WAMP which provides a User Interface
for managing and integrating Apache and other services.
What did it for me was the following, I've added the following directive in both the http <VirtualHost *:80>
and https <VirtualHost *:443>
virtual host blocks:
ServerName your-app.com
ServerAlias www.your-app.com
Header always unset X-Frame-Options
Header set X-Frame-Options "SAMEORIGIN"
The reasoning behind this? Well by default if set, the server does not reset the X-Frame-Options
header so we need to first always remove the default value, in my case it was DENY
, and then with the next rule we set it to the desired value, in my case SAMEORIGIN
. Of course you can use the Header set X-Frame-Options ALLOW-FROM ...
rule as well.
I had a similar issue I was getting the entire object in this
but the value was displaying while doing #each
.
Solution: I re-structure my array of object like this:
let list = results.map((item)=>{
return { name:item.name, author:item.author }
});
and then in template file:
{{#each list}}
<tr>
<td>{{name }}</td>
<td>{{author}}</td>
</tr>
{{/each}}
There is of course some apache log files. Search in your apache configuration files for 'Log' keyword, you'll certainly find plenty of them. Depending on your OS and installation places may vary (in a Typical Linux server it would be /var/log/apache2/[access|error].log).
Having a 503 error in Apache usually means the proxied page/service is not available. I assume you're using tomcat and that means tomcat is either not responding to apache (timeout?) or not even available (down? crashed?). So chances are that it's a configuration error in the way to connect apache and tomcat or an application inside tomcat that is not even sending a response for apache.
Sometimes, in production servers, it can as well be that you get too much traffic for the tomcat server, apache handle more request than the proxyied service (tomcat) can accept so the backend became unavailable.
Since you now specified you want to add to it, what you want isn't a simple IEnumerable<T>
but at least an ICollection<T>
. I recommend simply using a List<T>
like this:
List<object> myList=new List<object>();
myList.Add(1);
myList.Add(2);
myList.Add(3);
You can use myList everywhere an IEnumerable<object>
is expected, since List<object>
implements IEnumerable<object>
.
(old answer before clarification)
You can't create an instance of IEnumerable<T>
since it's a normal interface(It's sometimes possible to specify a default implementation, but that's usually used only with COM).
So what you really want is instantiate a class that implements the interface IEnumerable<T>
. The behavior varies depending on which class you choose.
For an empty sequence use:
IEnumerable<object> e0=Enumerable.Empty<object>();
For an non empty enumerable you can use some collection that implements IEnumerable<T>
. Common choices are the array T[]
, List<T>
or if you want immutability ReadOnlyCollection<T>
.
IEnumerable<object> e1=new object[]{1,2,3};
IEnumerable<object> e2=new List<object>(){1,2,3};
IEnumerable<object> e3=new ReadOnlyCollection(new object[]{1,2,3});
Another common way to implement IEnumerable<T>
is the iterator feature introduced in C# 3:
IEnumerable<object> MyIterator()
{
yield return 1;
yield return 2;
yield return 3;
}
IEnumerable<object> e4=MyIterator();
To elaborate on Ben's answer:
If you add a reference to Microsoft Scripting Runtime
and correctly type the variable fso you can take advantage of autocompletion (Intellisense) and discover the other great features of FileSystemObject
.
Here is a complete example module:
Option Explicit
' Go to Tools -> References... and check "Microsoft Scripting Runtime" to be able to use
' the FileSystemObject which has many useful features for handling files and folders
Public Sub SaveTextToFile()
Dim filePath As String
filePath = "C:\temp\MyTestFile.txt"
' The advantage of correctly typing fso as FileSystemObject is to make autocompletion
' (Intellisense) work, which helps you avoid typos and lets you discover other useful
' methods of the FileSystemObject
Dim fso As FileSystemObject
Set fso = New FileSystemObject
Dim fileStream As TextStream
' Here the actual file is created and opened for write access
Set fileStream = fso.CreateTextFile(filePath)
' Write something to the file
fileStream.WriteLine "something"
' Close it, so it is not locked anymore
fileStream.Close
' Here is another great method of the FileSystemObject that checks if a file exists
If fso.FileExists(filePath) Then
MsgBox "Yay! The file was created! :D"
End If
' Explicitly setting objects to Nothing should not be necessary in most cases, but if
' you're writing macros for Microsoft Access, you may want to uncomment the following
' two lines (see https://stackoverflow.com/a/517202/2822719 for details):
'Set fileStream = Nothing
'Set fso = Nothing
End Sub
Just use the following xml code:
Code for the layout:
<android.support.v7.widget.Toolbar
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/def_toolbar"
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:minHeight="?attr/actionBarSize"
android:background="@color/toolbarTransparent"
android:layout_alignParentTop="true" />
And add the following code in the colors.xml:
<color name="toolbarTransparent">#00FFFFFF</color>
This will give you the desired output.
First of all, beware of finding old examples. You've found one that uses XmlTextWriter
, which is deprecated as of .NET 2.0. XmlWriter.Create
should be used instead.
Here's an example of serializing an object into an XML column:
public void SerializeToXmlColumn(object obj)
{
using (var outputStream = new MemoryStream())
{
using (var writer = XmlWriter.Create(outputStream))
{
var serializer = new XmlSerializer(obj.GetType());
serializer.Serialize(writer, obj);
}
outputStream.Position = 0;
using (var conn = new SqlConnection(Settings.Default.ConnectionString))
{
conn.Open();
const string INSERT_COMMAND = @"INSERT INTO XmlStore (Data) VALUES (@Data)";
using (var cmd = new SqlCommand(INSERT_COMMAND, conn))
{
using (var reader = XmlReader.Create(outputStream))
{
var xml = new SqlXml(reader);
cmd.Parameters.Clear();
cmd.Parameters.AddWithValue("@Data", xml);
cmd.ExecuteNonQuery();
}
}
}
}
}
In order to do this for 2 strings you can do this:
def isAnagram(str1, str2):
str1_list = list(str1)
str1_list.sort()
str2_list = list(str2)
str2_list.sort()
return (str1_list == str2_list)
As for the iteration on the list, it is pretty straight forward
The above did not work for me but this did
<%= link_to "text_to_show_in_url", action_controller_path(:gender => "male", :param2=> "something_else") %>
just like Gregory Seront said here:
Actually if you downloaded the icons pack from the android web site, you will see that you have one folder per resolution named drawable-mdpi etc. Copy all folders into the res (not the drawable) folder in Android Studio. This will automatically make all the different resolution of the icon available.
but if your not getting the images from a generator site (maybe your UX team provides them), just make sure your folders are named drawable-hdpi, drawable-mdpi, etc. then in mac select all folders by holding shift and then copy them (DO NOT DRAG). Paste the folders into the res folder. android will take care of the rest and copy all drawables into the correct folder.
Check out yowsup
https://github.com/tgalal/yowsup
Yowsup is a python library that allows you to do all the previous in your own app. Yowsup allows you to login and use the Whatsapp service and provides you with all capabilities of an official Whatsapp client, allowing you to create a full-fledged custom Whatsapp client.
A solid example of Yowsup's usage is Wazapp. Wazapp is full featured Whatsapp client that is being used by hundreds of thousands of people around the world. Yowsup is born out of the Wazapp project. Before becoming a separate project, it was only the engine powering Wazapp. Now that it matured enough, it was separated into a separate project, allowing anyone to build their own Whatsapp client on top of it. Having such a popular client as Wazapp, built on Yowsup, helped bring the project into a much advanced, stable and mature level, and ensures its continuous development and maintaince.
Yowsup also comes with a cross platform command-line frontend called yowsup-cli. yowsup-cli allows you to jump into connecting and using Whatsapp service directly from command line.
I used this code, it is working fine
var arr = MyDiv.getElementsByTagName('script')
for (var n = 0; n < arr.length; n++)
eval(arr[n].innerHTML)//run script inside div
Uncheck this in Windows Explorer.
"Hide file type extensions for known types"
Elements are added to list using append()
:
>>> data = {'list': [{'a':'1'}]}
>>> data['list'].append({'b':'2'})
>>> data
{'list': [{'a': '1'}, {'b': '2'}]}
If you want to add element to a specific place in a list (i.e. to the beginning), use insert()
instead:
>>> data['list'].insert(0, {'b':'2'})
>>> data
{'list': [{'b': '2'}, {'a': '1'}]}
After doing that, you can assemble JSON again from dictionary you modified:
>>> json.dumps(data)
'{"list": [{"b": "2"}, {"a": "1"}]}'
How do I find a repository (if any) that contains this artifact?
Unfortunately due the binary license there is no public repository with the Oracle Driver JAR. This happens with many dependencies but is not Maven's fault. If you happen to find a public repository containing the JAR you can be sure that is illegal.
How do I add it so that Maven will use it?
Some JARs that can't be added due to license reasons have a pom entry in the Maven Central repo. Just check it out, it contains the vendor's preferred Maven info:
<groupId>com.oracle</groupId>
<artifactId>ojdbc14</artifactId>
<version>10.2.0.3.0</version>
...and the URL to download the file which in this case is http://www.oracle.com/technology/software/tech/java/sqlj_jdbc/index.html.
Once you've downloaded the JAR just add it to your computer repository with (note I pulled the groupId, artifactId and version from the POM):
mvn install:install-file -DgroupId=com.oracle -DartifactId=ojdbc14 \
-Dversion=10.2.0.3.0 -Dpackaging=jar -Dfile=ojdbc.jar -DgeneratePom=true
The last parameter for generating a POM will save you from pom.xml warnings
If your team has a local Maven repository this guide might be helpful to upload the JAR there.
You can also do it with jQuery:
var options = ["1", "2", "3", "4", "5"];
$('#select').empty();
$.each(options, function(i, p) {
$('#select').append($('<option></option>').val(p).html(p));
});
Because the accepted answer isn't on the same planet as BS3, I'll share what I'm using to achieve nearly full-width capabilities.
First off, this is cheating. It's not really fluid width - but it appears to be - depending on the size of the screen viewing the site.
The problem with BS3 and fluid width sites is that they have taken this "mobile first" approach, which requires that they define every freaking screen width up to what they consider to be desktop (1200px) I'm working on a laptop with a 1900px wide screen - so I end up with 350px on either side of the content at what BS3 thinks is a desktop sized width.
They have defined 10 screen widths (really only 5, but anyway). I don't really feel comfortable changing those, because they are common widths. So, I chose to define some extra widths for BS to choose from when deciding the width of the container class.
The way I use BS is to take all of the Bootstrap provided LESS files, omit the variables.less file to provide my own, and add one of my own to the end to override the things I want to change. Within my less file, I add the following to achieve 2 common screen width settings:
@media screen and (min-width: 1600px) {
.container {
max-width: (1600px - @grid-gutter-width);
}
}
@media screen and (min-width: 1900px) {
.container {
max-width: (1900px - @grid-gutter-width);
}
}
These two settings set the example for what you need to do to achieve different screen widths. Here, you get full width at 1600px, and 1900px. Any less than 1600 - BS falls back to the 1200px width, then to 768px and so forth - down to phone size.
If you have larger to support, just create more @media screen statements like these. If you're building the CSS instead, you'll want to determine what gutter width was used and subtract it from your target screen width.
Bootstrap 3.0.1 and up (so far) - it's as easy as setting @container-large-desktop
to 100%
I tried with the correct answer by @Lahiru, but did not work with MySQL server version 8.0.16 (Community) on macOS Mojave.
Followed the instructions by Sameer Choudhary above and with some adjustments, I was able to change root password and enable root access from localhost.
Update: All of these are not required, if you are installing on Mac OS using homebrew: "brew install mysql"
I got this error because I was trying to run
javac HelloWorld.java && java HelloWorld.class
when I should have removed .class
:
javac HelloWorld.java && java HelloWorld
If you'd still like to check your cron jobs you should provide a valid email account when setting the Cron jobs in cPanel.
When you specify a valid email you will receive the output of the cron job that is executed. Thus you will be able to check it and make sure everything has been executed correctly. Note that you will not receive an email if there is no output from the cron job command.
Please bear in mind that you will receive an email for each of the executed cron jobs. This may flood your inbox in case your crons run too often
Both stored procedures and functions are named blocks that reside in the database and can be executed as and when required.
The major differences are:
A stored procedure can optionally return values using out parameters, but can also be written in a manner without returning a value. But, a function must return a value.
A stored procedure cannot be used in a SELECT statement whereas a function can be used in a SELECT statement.
Practically speaking, I would go for a stored procedure for a specific group of requirements and a function for a common requirement that could be shared across multiple scenarios. For example: comparing between two strings, or trimming them or taking the last portion, if we have a function for that, we could globally use it for any application that we have.
System.Windows.MessageBox.Show("Hello world"); //WPF
System.Windows.Forms.MessageBox.Show("Hello world"); //WinForms
Have to add this based on @Joseph's answer. If someone want to create image object:
var image = new Image();
image.onload = function(){
console.log(image.width); // image is loaded and we have image width
}
image.src = 'data:image/png;base64,iVBORw0K...';
document.body.appendChild(image);
Just be aware of TempData persistence, it's a bit tricky. For example if you even simply read TempData inside the current request, it would be removed and consequently you don't have it for the next request. Instead, you can use Peek
method. I would recommend reading this cool article:
Set "C:\xampp\php"
in your PATH Environment Variable. Then restart CMD prompt.
$('#radio1').removeAttr('checked');
$('#radio2').removeAttr('checked');
$('#radio3').removeAttr('checked');
$('#radio4').removeAttr('checked');
Or
$('input[name="correctAnswer"]').removeAttr('checked');
use href
with indexof
<script type="text/javascript">
$(document).ready(function () {
if(window.location.href.indexOf("added-to-cart=555") > -1) {
alert("your url contains the added-to-cart=555");
}
});
</script>
jsonObj.profile-id
is a subtraction expression (i.e. jsonObj.profile - id
).
To access a key that contains characters that cannot appear in an identifier, use brackets:
jsonObj["profile-id"]
You can introduce another variable. It doesnt consolidate both checks, but it at least avoids having to put the body in twice:
do_it =
ifeq ($(GCC_MINOR), 4)
do_it = yes
endif
ifeq ($(GCC_MINOR), 5)
do_it = yes
endif
ifdef do_it
CFLAGS += -fno-strict-overflow
endif
I think you can use the overload of Regex.Replace to specify the maximum number of times to replace...
var regex = new Regex(Regex.Escape("o"));
var newText = regex.Replace("Hello World", "Foo", 1);
Common Query To Check Database Size in SQL Server that supports both Azure and On-Premises-
Method 1 – Using ‘sys.database_files’ System View
SELECT
DB_NAME() AS [database_name],
CONCAT(CAST(SUM(
CAST( (size * 8.0/1024) AS DECIMAL(15,2) )
) AS VARCHAR(20)),' MB') AS [database_size]
FROM sys.database_files;
Method 2 – Using ‘sp_spaceused’ System Stored Procedure
EXEC sp_spaceused ;
Amazingly now org.json now lets you put a byte[] object directly into a json and it remains readable. you can even send the resulting object over a websocket and it will be readable on the other side. but i am not sure yet if the size of the resulting object is bigger or smaller than if you were converting your byte array to base64, it would certainly be neat if it was smaller.
It seems to be incredibly hard to measure how much space such a json object takes up in java. if your json consists merely of strings it is easily achievable by simply stringifying it but with a bytearray inside it i fear it is not as straightforward.
stringifying our json in java replaces my bytearray for a 10 character string that looks like an id. doing the same in node.js replaces our byte[]
for an unquoted value reading <Buffered Array: f0 ff ff ...>
the length of the latter indicates a size increase of ~300% as would be expected
read last 3 characters from string [Initially asked question]
You can use string.Substring and give it the starting index and it will get the substring starting from given index till end.
myString.Substring(myString.Length-3)
Retrieves a substring from this instance. The substring starts at a specified character position. MSDN
Edit, for updated post
Remove last 3 characters from string [Updated question]
To remove the last three characters from the string you can use string.Substring(Int32, Int32) and give it the starting index 0
and end index three less than the string length. It will get the substring before last three characters.
myString = myString.Substring(0, myString.Length-3);
String.Substring Method (Int32, Int32)
Retrieves a substring from this instance. The substring starts at a specified character position and has a specified length.
You can also using String.Remove(Int32) method to remove the last three characters by passing start index as length - 3, it will remove from this point to end of string.
myString = myString.Remove(myString.Length-3)
Returns a new string in which all the characters in the current instance, beginning at a specified position and continuing through the last position, have been deleted
Here is the comparison between MD5 and SHA1. You can get a clear idea about which one is better.
withRouter
, history.listen
, and useEffect
(React Hooks) works quite nicely together:
import React, { useEffect } from 'react'
import { withRouter } from 'react-router-dom'
const Component = ({ history }) => {
useEffect(() => history.listen(() => {
// do something on route change
// for my example, close a drawer
}), [])
//...
}
export default withRouter(Component)
The listener callback will fire any time a route is changed, and the return for history.listen
is a shutdown handler that plays nicely with useEffect
.
just do it as follows in your html write:
<button ng-click="going()">goto</button>
And in your controller, add $state as follows:
.controller('homeCTRL', function($scope, **$state**) {
$scope.going = function(){
$state.go('your route');
}
})
An answer I read on another thread similar to this one that worked for me when I had this problem involved the layout xml.
Your logcat says "No view found for id 0x7f080011".
Open up the gen->package->R.java->id
and then look for id 0x7f080011
.
When I had this problem, this id belonged to a FrameLayout
in my activity_main.xml
file.
The FrameLayout did not have an ID (there was no statement android:id = "blablabla"
).
Make sure that all of your components in all of your layouts have IDs, particularly the component cited in the logcat.
I using "+" (plus) to insert div to html :
document.getElementById('idParent').innerHTML += '<div id="idChild"> content html </div>';
Hope this help.
I think you have to allocate a new array and put the values into the new array. For example:
int[] array1and2 = new int[array1.length + array2.length];
int currentPosition = 0;
for( int i = 0; i < array1.length; i++) {
array1and2[currentPosition] = array1[i];
currentPosition++;
}
for( int j = 0; j < array2.length; j++) {
array1and2[currentPosition] = array2[j];
currentPosition++;
}
As far as I can tell just looking at it, this code should work.
The -L
option to ls
will accomplish what you want. It dereferences symbolic links.
So your command would be:
ls -LR
You can also accomplish this with
find -follow
The -follow
option directs find to follow symbolic links to directories.
On Mac OS X use
find -L
as -follow
has been deprecated.
I faced to this problem a lot when developing my company's website using WordPress. Finally I found that it happened because me and my colleague update the website at the same time as well as we installed and activated many plugins that we did not use them. The solution for me was we update the website in different time and deactivated and uninstalled those plugins.
This should work:
start "" "c:\program files\php\php.exe" D:\mydocs\mp\index.php param1 param2
The start
command interprets the first argument as a window title if it contains spaces. In this case, that means start
considers your whole argument a title and sees no command. Passing ""
(an empty title) as the first argument to start
fixes the problem.
the getText
method returns a String, while the setText
receives a String, so you can write it like label1.setText(nameField.getText());
in your listener.
declare @iMonth int
declare @sYear varchar(4)
declare @sMonth varchar(2)
set @iMonth = 0
while @iMonth > -12
begin
set @sYear = year(DATEADD(month,@iMonth,GETDATE()))
set @sMonth = right('0'+cast(month(DATEADD(month,@iMonth,GETDATE())) as varchar(2)),2)
select @sYear + @sMonth
set @iMonth = @iMonth - 1
end
Puts the error message on top.
<style>
.radio-group{
position:relative; margin-top:40px;
}
#myoptions-error{
position:absolute;
top: -25px;
}
</style>
<div class="radio-group">
<input type="radio" name="myoptions" value="blue" class="required"> Blue<br />
<input type="radio" name="myoptions" value="red"> Red<br />
<input type="radio" name="myoptions" value="green"> Green </div>
</div><!-- end radio-group -->
If it is in the same class it is fine to trust the method.
It is very common to do this. It is good practice to check null values in constructor's and method's arguments to make sure that nobody is passing null values into them (if it is not allowed). Then if you implement your methods in a way that they never set the "start" graph to null, don't check for nulls there.
It is also good practice to implement unit tests for your methods and make sure that they are correctly implemented, so you can trust them.
post.capabilities.items
will still be defined because it's an empty array, if you check post.capabilities.items.length
it should work fine because 0
is falsy.
According to the protocol spec v76 (which is the version that browser with current support implement):
To close the connection cleanly, a frame consisting of just a 0xFF byte followed by a 0x00 byte is sent from one peer to ask that the other peer close the connection.
If you are writing a server, you should make sure to send a close frame when the server closes a client connection. The normal TCP socket close method can sometimes be slow and cause applications to think the connection is still open even when it's not.
The browser should really do this for you when you close or reload the page. However, you can make sure a close frame is sent by doing capturing the beforeunload event:
window.onbeforeunload = function() {
websocket.onclose = function () {}; // disable onclose handler first
websocket.close();
};
I'm not sure how you can be getting an onclose event after the page is refreshed. The websocket object (with the onclose handler) will no longer exist once the page reloads. If you are immediately trying to establish a WebSocket connection on your page as the page loads, then you may be running into an issue where the server is refusing a new connection so soon after the old one has disconnected (or the browser isn't ready to make connections at the point you are trying to connect) and you are getting an onclose event for the new websocket object.
The @japf answer above is working fine and in my case I wanted to change the mouse cursor from a Spinning Wheel back to the normal Arrow once the CEF Browser finished loading the page. In case it can help someone, here is the code:
private void Browser_LoadingStateChanged(object sender, CefSharp.LoadingStateChangedEventArgs e) {
if (!e.IsLoading) {
// set the cursor back to arrow
Application.Current.Dispatcher.BeginInvoke(DispatcherPriority.Background,
new Action(() => Mouse.OverrideCursor = Cursors.Arrow));
}
}
Recommend you to use Id, as Id is associated to only one element while class name may link to more than one element causing confusion to add event to element.
try if you really want to use class:
document.getElementsByClassName('drill_cursor')[0].onclick = function(){alert('1');};
or you may assign function in html itself:
<div class="drill_cursor" onclick='alert("1");'>
</div>
Pay attention that in http.Request header "Host" can not be set via Set
method
req.Header.Set("Host", "domain.tld")
but can be set directly:
req.Host = "domain.tld"
:
req, err := http.NewRequest("GET", "http://10.0.0.1/", nil)
if err != nil {
...
}
req.Host = "domain.tld"
client := &http.Client{}
resp, err := client.Do(req)
Try this:
var url = window.location;
var urlAux = url.split('=');
var img_id = urlAux[1]
With POD you can also write
Snapshot s = {};
You shouldn't use memset in C++, memset has the drawback that if there is a non-POD in the struct it will destroy it.
or like this:
struct init
{
template <typename T>
operator T * ()
{
return new T();
}
};
Snapshot* s = init();
This is a follow up to my previous answer and contains C++11 related material..
Pre-requisites : An elementary knowledge of Relations (Mathematics).
Yes! This is very true.
Sequence Points have been replaced by Sequenced Before and Sequenced After (and Unsequenced and Indeterminately Sequenced) relations in C++11.
Sequenced Before(§1.9/13) is a relation which is:
between evaluations executed by a single thread and induces a strict partial order1
Formally it means given any two evaluations(See below) A
and B
, if A
is sequenced before B
, then the execution of A
shall precede the execution of B
. If A
is not sequenced before B
and B
is not sequenced before A
, then A
and B
are unsequenced 2.
Evaluations A
and B
are indeterminately sequenced when either A
is sequenced before B
or B
is sequenced before A
, but it is unspecified which3.
[NOTES]
1 : A strict partial order is a binary relation "<"
over a set P
which is asymmetric
, and transitive
, i.e., for all a
, b
, and c
in P
, we have that:
........(i). if a < b then ¬ (b < a) (asymmetry
);
........(ii). if a < b and b < c then a < c (transitivity
).
2 : The execution of unsequenced evaluations can overlap.
3 : Indeterminately sequenced evaluations cannot overlap, but either could be executed first.
In C++11, evaluation of an expression (or a sub-expression) in general includes:
value computations (including determining the identity of an object for glvalue evaluation and fetching a value previously assigned to an object for prvalue evaluation) and
initiation of side effects.
Now (§1.9/14) says:
Every value computation and side effect associated with a full-expression is sequenced before every value computation and side effect associated with the next full-expression to be evaluated.
Trivial example:
int x;
x = 10;
++x;
Value computation and side effect associated with ++x
is sequenced after the value computation and side effect of x = 10;
Yes! Right.
In (§1.9/15) it has been mentioned that
Except where noted, evaluations of operands of individual operators and of subexpressions of individual expressions are unsequenced4.
For example :
int main()
{
int num = 19 ;
num = (num << 3) + (num >> 3);
}
+
operator are unsequenced relative to each other.<<
and >>
operators are unsequenced relative to each other.4: In an expression that is evaluated more than once during the execution of a program, unsequenced and indeterminately sequenced evaluations of its subexpressions need not be performed consistently in different evaluations.
(§1.9/15) The value computations of the operands of an operator are sequenced before the value computation of the result of the operator.
That means in x + y
the value computation of x
and y
are sequenced before the value computation of (x + y)
.
More importantly
(§1.9/15) If a side effect on a scalar object is unsequenced relative to either
(a) another side effect on the same scalar object
or
(b) a value computation using the value of the same scalar object.
the behaviour is undefined.
Examples:
int i = 5, v[10] = { };
void f(int, int);
i = i++ * ++i; // Undefined Behaviour
i = ++i + i++; // Undefined Behaviour
i = ++i + ++i; // Undefined Behaviour
i = v[i++]; // Undefined Behaviour
i = v[++i]: // Well-defined Behavior
i = i++ + 1; // Undefined Behaviour
i = ++i + 1; // Well-defined Behaviour
++++i; // Well-defined Behaviour
f(i = -1, i = -1); // Undefined Behaviour (see below)
When calling a function (whether or not the function is inline), every value computation and side effect associated with any argument expression, or with the postfix expression designating the called function, is sequenced before execution of every expression or statement in the body of the called function. [Note: Value computations and side effects associated with different argument expressions are unsequenced. — end note]
Expressions (5)
, (7)
and (8)
do not invoke undefined behaviour. Check out the following answers for a more detailed explanation.
Final Note :
If you find any flaw in the post please leave a comment. Power-users (With rep >20000) please do not hesitate to edit the post for correcting typos and other mistakes.
Quoting MSDN:
When SET XACT_ABORT is ON, if a Transact-SQL statement raises a run-time error, the entire transaction is terminated and rolled back. When SET XACT_ABORT is OFF, in some cases only the Transact-SQL statement that raised the error is rolled back and the transaction continues processing.
In practice this means that some of the statements might fail, leaving the transaction 'partially completed', and there might be no sign of this failure for a caller.
A simple example:
INSERT INTO t1 VALUES (1/0)
INSERT INTO t2 VALUES (1/1)
SELECT 'Everything is fine'
This code would execute 'successfully' with XACT_ABORT OFF, and will terminate with an error with XACT_ABORT ON ('INSERT INTO t2' will not be executed, and a client application will raise an exception).
As a more flexible approach, you could check @@ERROR after each statement (old school), or use TRY...CATCH blocks (MSSQL2005+). Personally I prefer to set XACT_ABORT ON whenever there is no reason for some advanced error handling.
The correct answer to this is that you shouldn't. If you want this type of thing either just use a dict, or you'll need to explicitly add attributes to some container. You can automate that by learning about decorators.
In particular, by the way, method1 in your example is just as good of an attribute.
Looping through a table for each row and reading the 1st column value works by using JQuery and DOM logic.
var i = 0;
var t = document.getElementById('flex1');
$("#flex1 tr").each(function() {
var val1 = $(t.rows[i].cells[0]).text();
alert(val1) ;
i++;
});
For me,issue was mongo was not running.So first i started "mongod" command in the console.And later in another console tab I have run "mongo". Now the connection is successful. Now run your app your problem should be solved.
According to section 2.2 of the manual, you can use the Escape key pressed twice in place of the CTRL key. This allowed me to use Nano's key combination for GO TO LINE when running Nano on a Jupyter/ JupyterHub and accessing through my browser. The normal key combination was getting 'swallowed' as the manual warns about can more often happen with the ALT key on some systems, and which can be replaced by one press of the ESCAPE key.
So for jump to line it was ESCAPE pressed twice, followed by shift key + dash key.
I had the same problem but after deleting the old plugin for org.codehaus.mojo it worked.
I use this
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>exec-maven-plugin</artifactId>
<version>1.2</version>
</plugin>
I figured it must be possible to simply use the empty list as the terminating condition for the loop and came up with this:
limit = 100
ints = list(range(2, limit)) # Will end up empty
while len(ints) > 0:
prime = ints[0]
print prime
ints.remove(prime)
i = 2
multiple = prime * i
while multiple <= limit:
if multiple in ints:
ints.remove(multiple)
i += 1
multiple = prime * i
I was wondering, why they didnt provide in jquery itself, so i made a few changes in jquery file ,,, here are the changed code block:
original Code block:
post: function( url, data, callback, type ) {
// shift arguments if data argument was omited
if ( jQuery.isFunction( data ) ) {
type = type || callback;
callback = data;
data = {};
}
return jQuery.ajax({
type: "POST",
url: url,
data: data,
success: callback,
dataType: type
});
Changed Code block:
post: function (url, data, callback, failcallback, type) {
if (type === undefined || type === null) {
if (!jQuery.isFunction(failcallback)) {
type=failcallback
}
else if (!jQuery.isFunction(callback)) {
type = callback
}
}
if (jQuery.isFunction(data) && jQuery.isFunction(callback)) {
failcallback = callback;
}
// shift arguments if data argument was omited
if (jQuery.isFunction(data)) {
type = type || callback;
callback = data;
data = {};
}
return jQuery.ajax({
type: "POST",
url: url,
data: data,
success: callback,
error:failcallback,
dataType: type
});
},
This should help the one trying to catch error on $.Post in jquery.
Updated: Or there is another way to do this is :
$.post(url,{},function(res){
//To do write if call is successful
}).error(function(p1,p2,p3){
//To do Write if call is failed
});
What you are trying to do can be simplified down to this.
$('input:text').bind('focus blur', function() {_x000D_
$(this).toggleClass('red');_x000D_
});
_x000D_
input{_x000D_
background:#FFFFEE;_x000D_
}_x000D_
.red{_x000D_
background-color:red;_x000D_
}
_x000D_
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>_x000D_
_x000D_
<form>_x000D_
<input class="calc_input" type="text" name="start_date" id="start_date" />_x000D_
<input class="calc_input" type="text" name="end_date" id="end_date" />_x000D_
<input class="calc_input" size="8" type="text" name="leap_year" id="leap_year" />_x000D_
</form>
_x000D_
From the manual page:
-P prefix
--directory-prefix=prefix
Set directory prefix to prefix. The directory prefix is the
directory where all other files and sub-directories will be
saved to, i.e. the top of the retrieval tree. The default
is . (the current directory).
So you need to add -P /tmp/cron_test/
(short form) or --directory-prefix=/tmp/cron_test/
(long form) to your command. Also note that if the directory does not exist it will get created.
In lieu of a python goto equivalent I use the break statement in the following fashion for quick tests of my code. This assumes you have structured code base. The test variable is initialized at the start of your function and I just move the "If test: break" block to the end of the nested if-then block or loop I want to test, modifying the return variable at the end of the code to reflect the block or loop variable I'm testing.
def x:
test = True
If y:
# some code
If test:
break
return something