You should use parameters in your query to prevent attacks, like if someone entered '); drop table ArticlesTBL;--'
as one of the values.
string query = "INSERT INTO ArticlesTBL (ArticleTitle, ArticleContent, ArticleType, ArticleImg, ArticleBrief, ArticleDateTime, ArticleAuthor, ArticlePublished, ArticleHomeDisplay, ArticleViews)";
query += " VALUES (@ArticleTitle, @ArticleContent, @ArticleType, @ArticleImg, @ArticleBrief, @ArticleDateTime, @ArticleAuthor, @ArticlePublished, @ArticleHomeDisplay, @ArticleViews)";
SqlCommand myCommand = new SqlCommand(query, myConnection);
myCommand.Parameters.AddWithValue("@ArticleTitle", ArticleTitleTextBox.Text);
myCommand.Parameters.AddWithValue("@ArticleContent", ArticleContentTextBox.Text);
// ... other parameters
myCommand.ExecuteNonQuery();
"UPDATE TableName SET TableField = TableField + 1 WHERE SomeFilterField = @ParameterID"
I know this question is old, but I wanted to post an answer based on the current state of affairs in the ASP.NET\IIS world combined with my real world experience.
I recently spearheaded a project at my company where I wanted to consolidate and manage all of the appSettings & connectionStrings settings in our web.config files in one central place. I wanted to pursue an approach where our config settings were stored in ZooKeeper due to that projects maturity & stability. Not to mention that fact that ZooKeeper is by design a configuration & cluster managing application.
The project goals were very simple;
Upon getting passed the technical piece of getting ASP.NET to talk to ZooKeeper, I quickly found and hit a wall with the following code;
ConfigurationManager.AppSettings.Add(key_name, data_value)
That statement made the most logical sense since I wanted to ADD new settings to the appSettings collection. However, as the original poster (and many others) mentioned, this code call returns an Error stating that the collection is Read-Only.
After doing a bit of research and seeing all the different crazy ways people worked around this problem, I was very discouraged. Instead of giving up or settling for what appeared to be a less than ideal scenario, I decided to dig in and see if I was missing something.
With a little trial and error, I found the following code would do exactly what I wanted;
ConfigurationManager.AppSettings.Set(key_name, data_value)
Using this line of code, I am now able to load all 85 appSettings keys from ZooKeeper in my Application_Start.
In regards to general statements about changes to web.config triggering IIS recycles, I edited the following appPool settings to monitor the situation behind the scenes;
appPool-->Advanced Settings-->Recycling-->Disable Recycling for Configuration Changes = False
appPool-->Advanced Settings-->Recycling-->Generate Recycle Event Log Entry-->[For Each Setting] = True
With that combination of settings, if this process were to cause an appPool recycle, an Event Log entry should have be recorded, which it was not.
This leads me to conclude that it is possible, and indeed safe, to load an applications settings from a centralized storage medium.
I should mention that I am using IIS7.5 on Windows 7. The code will be getting deployed to IIS8 on Win2012. Should anything regarding this answer change, I will update this answer accordingly.
I'd like to know, too. This helps isolate the problem for me
<connectionStrings configSource="connectionStrings.config"/>
I then keep a connectionStrings.config as well as a "{host} connectionStrings.config". It's still a problem, but if you do this for sections that differ in the two environments, you can deploy and version the same web.config.
(And I don't use VS, btw.)
There is also GLib solution for this case, I did not try it yet, but I believe it is a good solution. https://developer.gnome.org/glib/2.36/glib-Asynchronous-Queues.html#g-async-queue-new
When to use LIBXML_NOCDATA
?
I add the issue when transforming XML to JSON.
$xml = simplexml_load_string("<foo><content><![CDATA[Hello, world!]]></content></foo>");
echo json_encode($xml, true);
/* prints
{
"content": {}
}
*/
When accessing the SimpleXMLElement object, It gets the CDATA :
$xml = simplexml_load_string("<foo><content><![CDATA[Hello, world!]]></content></foo>");
echo $xml->content;
/* prints
Hello, world!
*/
I makes sense to use LIBXML_NOCDATA
because json_encode
don't access the SimpleXMLElement to trigger the string casting feature, I'm guessing a __toString()
equivalent.
$xml = simplexml_load_string("<foo><content><![CDATA[Hello, world!]]></content></foo>", null, LIBXML_NOCDATA);
echo json_encode($xml);
/*
{
"content": "Hello, world!"
}
*/
subprocess.Popen
takes a cwd
argument to set the Current Working Directory; you'll also want to escape your backslashes ('d:\\test\\local'
), or use r'd:\test\local'
so that the backslashes aren't interpreted as escape sequences by Python. The way you have it written, the \t
part will be translated to a tab.
So, your new line should look like:
subprocess.Popen(r'c:\mytool\tool.exe', cwd=r'd:\test\local')
To use your Python script path as cwd, import os
and define cwd using this:
os.path.dirname(os.path.realpath(__file__))
Try this code
public static String pathRoot = "/sdcard/system/temp/";
public static String readFromFile(Context contect, String nameFile) {
String aBuffer = "";
try {
File myFile = new File(pathRoot + nameFile);
FileInputStream fIn = new FileInputStream(myFile);
BufferedReader myReader = new BufferedReader(new InputStreamReader(fIn));
String aDataRow = "";
while ((aDataRow = myReader.readLine()) != null) {
aBuffer += aDataRow;
}
myReader.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return aBuffer;
}
To work only chrome or safari, try it:
@media screen and (-webkit-min-device-pixel-ratio:0) {
/* Safari and Chrome */
.myClass {
color:red;
}
/* Safari only override */
::i-block-chrome,.myClass {
color:blue;
}}
The term parameter refers to any declaration within the parentheses following the method/function name in a method/function declaration or definition; the term argument refers to any expression within the parentheses of a method/function call. i.e.
Please have a look at the below example for better understanding:
package com.stackoverflow.works;
public class ArithmeticOperations {
public static int add(int x, int y) { //x, y are parameters here
return x + y;
}
public static void main(String[] args) {
int x = 10;
int y = 20;
int sum = add(x, y); //x, y are arguments here
System.out.println("SUM IS: " +sum);
}
}
Thank you!
Installing XCode requires:
To install g++ *WITHOUT* having to download the MASSIVE 4.7G xCode install, try this package:
https://github.com/kennethreitz/osx-gcc-installer
The DMG files linked on that page are ~270M and much quicker to install. This was perfect for me, getting homebrew up and running with a minimum of hassle.
The github project itself is basically a script that repackages just the critical chunks of xCode for distribution. In order to run that script and build the DMG files, you'd need to already have an XCode install, which would kind of defeat the point, so the pre-built DMG files are hosted on the project page.
Hy there , in my case i am using asp.net development environment, so i was want to upload those data in asynchronus ajax request , in [webMethod] you can not catch the file uploader since it is not static element , so i had to make a turnover for such solution by fixing the path , than convert the wanted image into bytes to save it in DB .
Here is my javascript function , hope it helps you:
function FixPath(Path)
{
var HiddenPath = Path.toString();
alert(HiddenPath.indexOf("FakePath"));
if (HiddenPath.indexOf("FakePath") > 1)
{
var UnwantedLength = HiddenPath.indexOf("FakePath") + 7;
MainStringLength = HiddenPath.length - UnwantedLength;
var thisArray =[];
var i = 0;
var FinalString= "";
while (i < MainStringLength)
{
thisArray[i] = HiddenPath[UnwantedLength + i + 1];
i++;
}
var j = 0;
while (j < MainStringLength-1)
{
if (thisArray[j] != ",")
{
FinalString += thisArray[j];
}
j++;
}
FinalString = "~" + FinalString;
alert(FinalString);
return FinalString;
}
else
{
return HiddenPath;
}
}
here only for testing :
$(document).ready(function () {
FixPath("hakounaMatata:/7ekmaTa3mahaLaziz/FakePath/EnsaLmadiLiYghiz");
});
// this will give you : ~/EnsaLmadiLiYghiz
I got the same question after updating OS X Yosemite, well the solution is quite simple, check system preference -> mysql, the status was STOP. Just restart it and it works fine on my mac now.
Notepad++ will only auto-insert subsequent indents if you manually indent the first line in a block; otherwise you can re-indent your code after the fact using TextFX > TextFX Edit > Reindent C++ code
.
First off I would say use boost tokenizer.
Alternatively if your data is space separated then the string stream library is very useful.
But both the above have already been covered.
So as a third C-Like alternative I propose copying the std::string into a buffer for modification.
std::string data("The data I want to tokenize");
// Create a buffer of the correct length:
std::vector<char> buffer(data.size()+1);
// copy the string into the buffer
strcpy(&buffer[0],data.c_str());
// Tokenize
strtok(&buffer[0]," ");
The timeouts()
methods are not implemented in some drivers and are very unreliable in general.
I use a separate thread for the timeouts (passing the url to access as the thread name):
Thread t = new Thread(new Runnable() {
public void run() {
driver.get(Thread.currentThread().getName());
}
}, url);
t.start();
try {
t.join(YOUR_TIMEOUT_HERE_IN_MS);
} catch (InterruptedException e) { // ignore
}
if (t.isAlive()) { // Thread still alive, we need to abort
logger.warning("Timeout on loading page " + url);
t.interrupt();
}
This seems to work most of the time, however it might happen that the driver is really stuck and any subsequent call to driver will be blocked (I experience that with Chrome driver on Windows). Even something as innocuous as a driver.findElements() call could end up being blocked. Unfortunately I have no solutions for blocked drivers.
Right-click on the table in SSMS, 'Design' it, and click on the id column. In the properties, set the identity to be seeded @ e.g. 1 and to have increment of 1 - save and you're done.
Before you debug with iPhone, follow this mapping table about the version of Xcode and iOS:
Xcode 12.3 ? iOS 14.3
Xcode 12.2 ? iOS 14.2
Xcode 12.1 ? iOS 14.1
Xcode 12 ? iOS 14
Xcode 11.7 ? iOS 13.7
Xcode 11.6 ? iOS 13.6
Xcode 11.5 ? iOS 13.5
Xcode 11.4 ? iOS 13.4
Download at https://developer.apple.com/download/more/.
If you're still encountering the error, try to unpair the device within the menu Window > Devices and Simulators, clean Xcode, reconnect and trust the device, then re-run. It worked for me!
Get more info: https://en.wikipedia.org/wiki/Xcode
The compiler doesn't know that Environment.Exit() does not return. Why not just "return" from Main()?
what about just have the option number:
#include <iostream>
#include <string>
using namespace std;
int main()
{
string s;
int op;
cin >> s >> op;
switch (op) {
case 1: break;
case 2: break;
default:
}
return 0;
}
Get Username and password
Make it more clear to read but put it on a better position over the screen
#!/bin/bash
clear
echo
echo
echo
counter=0
unset username
prompt=" Enter Username:"
while IFS= read -p "$prompt" -r -s -n 1 char
do
if [[ $char == $'\0' ]]; then
break
elif [ $char == $'\x08' ] && [ $counter -gt 0 ]; then
prompt=$'\b \b'
username="${username%?}"
counter=$((counter-1))
elif [ $char == $'\x08' ] && [ $counter -lt 1 ]; then
prompt=''
continue
else
counter=$((counter+1))
prompt="$char"
username+="$char"
fi
done
echo
unset password
prompt=" Enter Password:"
while IFS= read -p "$prompt" -r -s -n 1 char
do
if [[ $char == $'\0' ]]; then
break
elif [ $char == $'\x08' ] && [ $counter -gt 0 ]; then
prompt=$'\b \b'
password="${password%?}"
counter=$((counter-1))
elif [ $char == $'\x08' ] && [ $counter -lt 1 ]; then
echo
prompt=" Enter Password:"
continue
else
counter=$((counter+1))
prompt='*'
password+="$char"
fi
done
I faced the same error :
"An error occurred while updating the entries. See the inner exception for details”
Simply Delete and Recreate the *.edmx file. Its worked for me. the error will gone
imho there are two cases for branches that were forgot to close
Case 1: branch was not merged into default
in this case I update to the branch and do another commit with --close-branch, unfortunatly this elects the branch to become the new tip and hence before pushing it to other clones I make sure that the real tip receives some more changes and others don't get confused about that strange tip.
hg up myBranch
hg commit --close-branch
Case 2: branch was merged into default
This case is not that much different from case 1 and it can be solved by reproducing the steps for case 1 and two additional ones.
in this case I update to the branch changeset, do another commit with --close-branch and merge the new changeset that became the tip into default. the last operation creates a new tip that is in the default branch - HOORAY!
hg up myBranch
hg commit --close-branch
hg up default
hg merge myBranch
Hope this helps future readers.
you can try this, I would do it with CSS, but i think you want it with tables without CSS.
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<body leftmargin=0 rightmargin=0>
<table cellpadding="0" cellspacing="0" width="100%" border="1" height="350px">
<tr>
<td width="25%"> </td>
<td width="25%"> </td>
<td width="25%"> </td>
<td width="25%"> </td>
</tr>
</table>
</body>
</html>
In Kotlin we can get application context in fragment using this
requireActivity().application
Here's my example that provides ability to call as $var = new Singleton() and also creating 3 variables to test if it creates new object:
class Singleton{
private static $data;
function __construct(){
if ($this::$data == null){
$this->makeSingleton();
}
echo "<br/>".$this::$data;
}
private function makeSingleton(){
$this::$data = rand(0, 100);
}
public function change($new_val){
$this::$data = $new_val;
}
public function printme(){
echo "<br/>".$this::$data;
}
}
$a = new Singleton();
$b = new Singleton();
$c = new Singleton();
$a->change(-2);
$a->printme();
$b->printme();
$d = new Singleton();
$d->printme();
You can also use a call to SCOPE_IDENTITY in SQL Server.
Update Android emulator alone from SDK tool
Yes, but in what file is pyth_test
's definition declared in? Is it also located before it's called?
Edit:
To put it into perspective, create a file called test.py
with the following contents:
def pyth_test (x1, x2):
print x1 + x2
pyth_test(1,2)
Now run the following command:
python test.py
You should see the output you desire. Now if you are in an interactive session, it should go like this:
>>> def pyth_test (x1, x2):
... print x1 + x2
...
>>> pyth_test(1,2)
3
>>>
I hope this explains how the declaration works.
To give you an idea of how the layout works, we'll create a few files. Create a new empty folder to keep things clean with the following:
myfunction.py
def pyth_test (x1, x2):
print x1 + x2
program.py
#!/usr/bin/python
# Our function is pulled in here
from myfunction import pyth_test
pyth_test(1,2)
Now if you run:
python program.py
It will print out 3. Now to explain what went wrong, let's modify our program this way:
# Python: Huh? where's pyth_test?
# You say it's down there, but I haven't gotten there yet!
pyth_test(1,2)
# Our function is pulled in here
from myfunction import pyth_test
Now let's see what happens:
$ python program.py
Traceback (most recent call last):
File "program.py", line 3, in <module>
pyth_test(1,2)
NameError: name 'pyth_test' is not defined
As noted, python cannot find the module for the reasons outlined above. For that reason, you should keep your declarations at top.
Now then, if we run the interactive python session:
>>> from myfunction import pyth_test
>>> pyth_test(1,2)
3
The same process applies. Now, package importing isn't all that simple, so I recommend you look into how modules work with Python. I hope this helps and good luck with your learnings!
the best explanation i've found is this:
What is the difference betwen INTEGER and NUMBER? When should we use NUMBER and when should we use INTEGER? I just wanted to update my comments here...
NUMBER always stores as we entered. Scale is -84 to 127. But INTEGER rounds to whole number. The scale for INTEGER is 0. INTEGER is equivalent to NUMBER(38,0). It means, INTEGER is constrained number. The decimal place will be rounded. But NUMBER is not constrained.
INTEGER is always slower then NUMBER. Since integer is a number with added constraint. It takes additional CPU cycles to enforce the constraint. I never watched any difference, but there might be a difference when we load several millions of records on the INTEGER column. If we need to ensure that the input is whole numbers, then INTEGER is best option to go. Otherwise, we can stick with NUMBER data type.
Here is the link
Here is a simple approach which will print the 2 different elapsed time for each query.
DECLARE @t1 DATETIME;
DECLARE @t2 DATETIME;
SET @t1 = GETDATE();
SELECT DISTINCT u.profession FROM users u; --Query with DISTINCT
SET @t2 = GETDATE();
PRINT 'Elapsed time (ms): ' + CAST(DATEDIFF(millisecond, @t1, @t2) AS varchar);
SET @t1 = GETDATE();
SELECT u.profession FROM users u GROUP BY u.profession; --Query with GROUP BY
SET @t2 = GETDATE();
PRINT 'Elapsed time (ms): ' + CAST(DATEDIFF(millisecond, @t1, @t2) AS varchar);
OR try SET STATISTICS TIME (Transact-SQL)
SET STATISTICS TIME ON;
SELECT DISTINCT u.profession FROM users u; --Query with DISTINCT
SELECT u.profession FROM users u GROUP BY u.profession; --Query with GROUP BY
SET STATISTICS TIME OFF;
It simply displays the number of milliseconds required to parse, compile, and execute each statement as below:
SQL Server Execution Times:
CPU time = 0 ms, elapsed time = 2 ms.
I ended up writing a function that has worked for me well so far:
// pretty print data
function out($data, $label = NULL) {
$CLI = (php_sapi_name() === 'cli') ? 'cli' : '';
$gettype = gettype($data);
if (isset($label)) {
if ($CLI) { $label = $label . ': '; }
else { $label = '<b>'.$label.'</b>: '; }
}
if ($gettype == 'string' || $gettype == 'integer' || $gettype == 'double' || $gettype == 'boolean') {
if ($CLI) { echo $label . $data . "\n"; }
else { echo $label . $data . "<br/>"; }
}
else {
if ($CLI) { echo $label . print_r($data,1) . "\n"; }
else { echo $label . "<pre>".print_r($data,1)."</pre>"; }
}
}
// Usage
out('Hello world!');
$var = 'Hello Stackoverflow!';
out($var, 'Label');
It's easy to do multiline replace in Notepad++. You have to use \n
to represent the newline in your string, and it works for both search and replace strings. You have to make sure to select "Extended" search mode in the bottom left corner of the search window.
I found a good article describing the features here: http://markantoniou.blogspot.com/2008/06/notepad-how-to-use-regular-expressions.html
You may just need to add @Transient
annotations on roles to not serialize the set.
Let's assume that you have 2 divs inside of your html file.
<div id="div1">some text</div>
<div id="div2">some other text</div>
The java program itself can't update the content of the html file because the html is related to the client, meanwhile java is related to the back-end.
You can, however, communicate between the server (the back-end) and the client.
What we're talking about is AJAX, which you achieve using JavaScript, I recommend using jQuery which is a common JavaScript library.
Let's assume you want to refresh the page every constant interval, then you can use the interval function to repeat the same action every x time.
setInterval(function()
{
alert("hi");
}, 30000);
You could also do it like this:
setTimeout(foo, 30000);
Whereea foo is a function.
Instead of the alert("hi") you can perform the AJAX request, which sends a request to the server and receives some information (for example the new text) which you can use to load into the div.
A classic AJAX looks like this:
var fetch = true;
var url = 'someurl.java';
$.ajax(
{
// Post the variable fetch to url.
type : 'post',
url : url,
dataType : 'json', // expected returned data format.
data :
{
'fetch' : fetch // You might want to indicate what you're requesting.
},
success : function(data)
{
// This happens AFTER the backend has returned an JSON array (or other object type)
var res1, res2;
for(var i = 0; i < data.length; i++)
{
// Parse through the JSON array which was returned.
// A proper error handling should be added here (check if
// everything went successful or not)
res1 = data[i].res1;
res2 = data[i].res2;
// Do something with the returned data
$('#div1').html(res1);
}
},
complete : function(data)
{
// do something, not critical.
}
});
Wherea the backend is able to receive POST'ed data and is able to return a data object of information, for example (and very preferrable) JSON, there are many tutorials out there with how to do so, GSON from Google is something that I used a while back, you could take a look into it.
I'm not professional with Java POST receiving and JSON returning of that sort so I'm not going to give you an example with that but I hope this is a decent start.
For some of the cases where you can affect the source number representation, you can represent them as fractions instead of floats, using integer numerator and denominator. That way you can have exact comparisons.
See Fraction from fractions module for details.
Here is a snippet from me in testing... obviously passing via get to the script may not be the best... should post or just send an id and grab guid from db... anyhow.. this worked. I take the URL and convert it to a path.
// Initialize a file URL to the variable
$file = $_GET['url'];
$file = str_replace(Polepluginforrvms_Plugin::$install_url, $DOC_ROOT.'/pole-permitter/', $file );
$quoted = sprintf('"%s"', addcslashes(basename($file), '"\\'));
$size = filesize($file);
header( "Content-type: application/octet-stream" );
header( "Content-Disposition: attachment; filename={$quoted}" );
header( "Content-length: " . $size );
header( "Pragma: no-cache" );
header( "Expires: 0" );
readfile( "{$file}" );
If your project contains a RouteConfig.cs file, then you probably need to ignore the route to the root by adding routes.IgnoreRoute("");
in this file.
If it doen't solve your problem, try this :
void Application_BeginRequest(object sender, EventArgs e)
{
if (Request.AppRelativeCurrentExecutionFilePath == "~/")
Response.Redirect("~/index.aspx");
}
I had this issue when leaving a view (pop back to the previous view).
the reason was having
addSubview(view)
view.translatesAutoresizingMaskIntoConstraints = false
NSLayoutConstraint.activate([
view.leadingAnchor.constraint(equalTo: safeAreaLayoutGuide.leadingAnchor),
view.topAnchor.constraint(equalTo: safeAreaLayoutGuide.topAnchor),
view.trailingAnchor.constraint(equalTo: safeAreaLayoutGuide.trailingAnchor),
view.bottomAnchor.constraint(equalTo: safeAreaLayoutGuide.bottomAnchor)
])
Change safeAreaLayoutGuide
to self
solve the issue.
Meaning aligns the view with the superview's leading, trailing, top, bottom instead of to safe area)
PM2 now supports npm start:
pm2 start npm -- start
To assign a name to the PM2 process, use the --name
option:
pm2 start npm --name "app name" -- start
<?php
function wget($address,$filename)
{
file_put_contents($filename,file_get_contents($address));
}
?>
use:
<?php
wget(URL, FileName);
?>
Width can be set to specific column as below: By percentages:
<asp:BoundField HeaderText="UserInfo" DataField="UserInfo"
SortExpression="UserInfo" ItemStyle-Width="100%"></asp:BoundField>
OR
By pixel:
<asp:BoundField HeaderText="UserInfo" DataField="UserInfo"
SortExpression="UserInfo" ItemStyle-Width="500px"></asp:BoundField>
Try this instead in the end:
exec (@query)
If you do not have the brackets, SQL Server assumes the value of the variable to be a stored procedure name.
OR
EXECUTE sp_executesql @query
And it should not be because of FULL JOIN.
But I hope you have already created the temp tables: #TrafficFinal, #TrafficFinal2, #TrafficFinal3 before this.
Please note that there are performance considerations between using EXEC and sp_executesql. Because sp_executesql uses forced statement caching like an sp.
More details here.
On another note, is there a reason why you are using dynamic sql for this case, when you can use the query as is, considering you are not doing any query manipulations and executing it the way it is?
You can also use MDIParent-child form. Set the child form's parent as MDI Parent
Eg
child.MdiParent = parentForm;
child.Show();
In this case just 1 form will be shown and the child forms will come inside the parent. Hope this helps
Try this please
DELETE FROM messages,usersmessages
USING messages
INNER JOIN usermessages on (messages.messageid = usersmessages.messageid)
WHERE messages.messsageid='1'
Another way to do this would be to add this line to the assembly info of the web application:
// Configure log4net using the .config file
[assembly: log4net.Config.XmlConfigurator(Watch = true)]
Similar to Shriek's.
total count the documents where the value of the field is not equal to the specified value.
async function getRegisterUser() {
return Login.count({"role": { $ne: 'Super Admin' }}, (err, totResUser) => {
if (err) {
return err;
}
return totResUser;
})
}
I think for readability and speed @oxrock's solution is the best, so here is the code rewritten for python 3+:
def num_factors(n):
results = set()
for i in range(1, int(n**0.5) + 1):
if n % i == 0: results.update([i,int(n/i)])
return results
in one line
> samp.with.rownames <- data.frame(samp[,-1], row.names=samp[,1])
define changed props in mapStateToProps of connect method in child component.
function mapStateToProps(state) {
return {
chanelList: state.messaging.chanelList,
};
}
export default connect(mapStateToProps)(ChannelItem);
In my case, channelList's channel is updated so I added chanelList in mapStateToProps
To whom its just not working to (like me) no matter what you tried:
<element onscroll="myFunction()"></element>
works like a charm
exactly as they explain in W3 schools https://www.w3schools.com/tags/ev_onscroll.asp
\d{1}(\.\d{1,3})?
Match a single digit 0..9 «\d{1}»
Exactly 1 times «{1}»
Match the regular expression below and capture its match into backreference number 1 «(\.\d{1,3})?»
Between zero and one times, as many times as possible, giving back as needed (greedy) «?»
Match the character “.” literally «\.»
Match a single digit 0..9 «\d{1,3}»
Between one and 3 times, as many times as possible, giving back as needed (greedy) «{1,3}»
Created with RegexBuddy
Matches:
1
1.2
1.23
1.234
items is one attribute of dict object.maybe you can try
qs[0].items()
For squashing two commits, one of which was already pushed, on a single branch the following worked:
git rebase -i HEAD~2
[ pick older-commit ]
[ squash newest-commit ]
git push --force
By default, this will include the commit message of the newest commit as a comment on the older commit.
From git stash --help
Recovering stashes that were cleared/dropped erroneously
If you mistakenly drop or clear stashes, they cannot be recovered through the normal safety mechanisms. However, you can try the
following incantation to get a list of stashes that are still in your repository, but not reachable any more:
git fsck --unreachable |
grep commit | cut -d\ -f3 |
xargs git log --merges --no-walk --grep=WIP
This helped me better than the accepted answer with the same scenario.
You can write your own equals function:
a == b
Because you're dealing with json, you'll have standard python types: dict
, list
, etc., so you can do hard type checking if type(obj) == 'dict':
, etc.
Rough example (not tested):
def json_equals(jsonA, jsonB):
if type(jsonA) != type(jsonB):
# not equal
return False
if type(jsonA) == dict:
if len(jsonA) != len(jsonB):
return False
for keyA in jsonA:
if keyA not in jsonB or not json_equal(jsonA[keyA], jsonB[keyA]):
return False
elif type(jsonA) == list:
if len(jsonA) != len(jsonB):
return False
for itemA, itemB in zip(jsonA, jsonB):
if not json_equal(itemA, itemB):
return False
else:
return jsonA == jsonB
I created a more comprehensive and cleaner version that some people might find useful for remembering which name corresponds to which value. I used Chrome Dev Tool's color code and labels are organized symmetrically to pick up analogies faster:
Note 1: clientLeft
also includes the width of the vertical scroll
bar if the direction of the text is set to right-to-left (since the
bar is displayed to the left in that case)
Note 2: the outermost line represents the closest positioned parent
(an element whose position
property is set to a value different than
static
or initial
). Thus, if the direct container isn’t a positioned
element, then the line doesn’t represent the first container in
the hierarchy but another element higher in the hierarchy. If no
positioned parent is found, the browser will take the html
or body
element as reference
Hope somebody finds it useful, just my 2 cents ;)
I created an example that uses Express and Multer. It is very simple and avoids all Connect warnings
It might help somebody.
$(document).ready(function() {
$("#editor").bind('paste', function (e){
$(e.target).keyup(getInput);
});
function getInput(e){
var inputText = $(e.target).html(); /*$(e.target).val();*/
alert(inputText);
$(e.target).unbind('keyup');
}
});
I usually do like this:
from numpy import log as ln
Perhaps this can make you more comfortable.
Open up Settings (By default is Alt + Ctrl + S) and search for Live Templates. In the upper part there's an option that says "By default expand with TAB" (TAB is the default), choose "Custom" and then hit "change" and add the keymap "ctrl+spacebar" to the option "Expand Live Template/Emmet Abbreviation".
Now you can hit ctrl + spacebar and expand the live templates. Now, to change it to "syso" instead of "sout", in the Live Templates option, theres a list of tons of options checked, go to "other" and expand it, there you wil find "sout", just rename it to "syso" and hit aply.
Hope this can help you.
Close... try:
select
Sum(case when rsp_ind = 0 then 1 Else 0 End) as 'New',
Sum(case when rsp_ind = 1 then 1 else 0 end) as 'Accepted'
from tb_a
You should use PDO Prepare
From the link:
Calling PDO::prepare() and PDOStatement::execute() for statements that will be issued multiple times with different parameter values optimizes the performance of your application by allowing the driver to negotiate client and/or server side caching of the query plan and meta information, and helps to prevent SQL injection attacks by eliminating the need to manually quote the parameters.
In order to get it REALLY smoooth...
x <- 1:10
y <- c(2,4,6,8,7,8,14,16,18,20)
lo <- loess(y~x)
plot(x,y)
xl <- seq(min(x),max(x), (max(x) - min(x))/1000)
lines(xl, predict(lo,xl), col='red', lwd=2)
This style interpolates lots of extra points and gets you a curve that is very smooth. It also appears to be the the approach that ggplot takes. If the standard level of smoothness is fine you can just use.
scatter.smooth(x, y)
Google used to recommend putting it just before the </body>
tag, because the original method they provided for loading ga.js
was blocking. The newer async syntax, though, can safely be put in the head with minimal blockage, so the current recommendation is just before the </head>
tag.
<head>
will add a little latency; in the footer will reduce the number of pageviews recorded at some small margin. It's a tradeoff. ga.js
is heavily cached and present on a large percentage of sites across the web, so its often served from the cache, reducing latency to almost nil.
As a matter of personal preference, I like to include it in the <head>
, but its really a matter of preference.
Sometimes it is possible to solve it in the model like this: Suppose you have 3 boolean properties OptionA, OptionB, OptionC.
XAML:
<RadioButton IsChecked="{Binding OptionA}"/>
<RadioButton IsChecked="{Binding OptionB}"/>
<RadioButton IsChecked="{Binding OptionC}"/>
CODE:
private bool _optionA;
public bool OptionA
{
get { return _optionA; }
set
{
_optionA = value;
if( _optionA )
{
this.OptionB= false;
this.OptionC = false;
}
}
}
private bool _optionB;
public bool OptionB
{
get { return _optionB; }
set
{
_optionB = value;
if( _optionB )
{
this.OptionA= false;
this.OptionC = false;
}
}
}
private bool _optionC;
public bool OptionC
{
get { return _optionC; }
set
{
_optionC = value;
if( _optionC )
{
this.OptionA= false;
this.OptionB = false;
}
}
}
You get the idea. Not the cleanest thing, but easy.
This would be an optimized way of doing it
StringBuilder sb = new StringBuilder();
for (String n : arr) {
sb.append("'").append(n).append("',");
}
if(sb.length()>0)
sb.setLength(sbDiscrep.length()-1);
return sb.toString();
The most likely reason for the error is that the certificate authority that issued your SSL certificate is trusted on your desktop, but not on your mobile.
If you purchased the certificate from a common certification authority, it shouldn't be an issue - but if it is a less common one it is possible that your phone doesn't have it. You may need to accept it as a trusted publisher (although this is not ideal if you are pushing the site to the public as they won't be willing to do this.)
You might find looking at a list of Trusted CAs for Android helps to see if yours is there or not.
Try this:
for(var i = 0; i < data.length; i++){
console.log(data[i].com)
}
i am sharing code form my project using regular expression you can do this...
String ChildBelowList = "";
if (!Childbelow.isEmpty()) {
for (int iCB = 0; iCB < Childbelow.size(); iCB++) {
ChildBelowList = ChildBelowList += Childbelow.get(iCB) + ",";
}
ChildBelowList = ChildBelowList.replaceAll("(^(\\s*?\\,+)+\\s?)|(^\\s+)|(\\s+$)|((\\s*?\\,+)+\\s?$)", "");
tv_childbelow.setText(ChildBelowList);
} else {
ll_childbelow.setVisibility(View.GONE);
}
I usually do the reading routine straightforward:
void readResource(InputStream source) throws IOException {
BufferedReader stream = null;
try {
stream = new BufferedReader(new InputStreamReader(source));
while (true) {
String line = stream.readLine();
if(line == null) {
break;
}
//process line
System.out.println(line)
}
} finally {
closeQuiet(stream);
}
}
static void closeQuiet(Closeable closeable) {
if (closeable != null) {
try {
closeable.close();
} catch (IOException ignore) {
}
}
}
While the answers explaining the exact differences are fine, I want to show how the relational algebra is transformed to SQL and what the actual value of the 3 concepts is.
The key concept in your question is the idea of a join. To understand a join you need to understand a Cartesian Product (the example is based on SQL where the equivalent is called a cross join as onedaywhen points out);
This isn't very useful in practice. Consider this example.
Product(PName, Price)
====================
Laptop, 1500
Car, 20000
Airplane, 3000000
Component(PName, CName, Cost)
=============================
Laptop, CPU, 500
Laptop, hdd, 300
Laptop, case, 700
Car, wheels, 1000
The Cartesian product Product x Component will be - bellow or sql fiddle. You can see there are 12 rows = 3 x 4. Obviously, rows like "Laptop" with "wheels" have no meaning, this is why in practice the Cartesian product is rarely used.
| PNAME | PRICE | CNAME | COST |
--------------------------------------
| Laptop | 1500 | CPU | 500 |
| Laptop | 1500 | hdd | 300 |
| Laptop | 1500 | case | 700 |
| Laptop | 1500 | wheels | 1000 |
| Car | 20000 | CPU | 500 |
| Car | 20000 | hdd | 300 |
| Car | 20000 | case | 700 |
| Car | 20000 | wheels | 1000 |
| Airplane | 3000000 | CPU | 500 |
| Airplane | 3000000 | hdd | 300 |
| Airplane | 3000000 | case | 700 |
| Airplane | 3000000 | wheels | 1000 |
JOINs are here to add more value to these products. What we really want is to "join" the product with its associated components, because each component belongs to a product. The way to do this is with a join:
Product JOIN Component ON Pname
The associated SQL query would be like this (you can play with all the examples here)
SELECT *
FROM Product
JOIN Component
ON Product.Pname = Component.Pname
and the result:
| PNAME | PRICE | CNAME | COST |
----------------------------------
| Laptop | 1500 | CPU | 500 |
| Laptop | 1500 | hdd | 300 |
| Laptop | 1500 | case | 700 |
| Car | 20000 | wheels | 1000 |
Notice that the result has only 4 rows, because the Laptop has 3 components, the Car has 1 and the Airplane none. This is much more useful.
Getting back to your questions, all the joins you ask about are variations of the JOIN I just showed:
Natural Join = the join (the ON clause) is made on all columns with the same name; it removes duplicate columns from the result, as opposed to all other joins; most DBMS (database systems created by various vendors such as Microsoft's SQL Server, Oracle's MySQL etc. ) don't even bother supporting this, it is just bad practice (or purposely chose not to implement it). Imagine that a developer comes and changes the name of the second column in Product from Price to Cost. Then all the natural joins would be done on PName AND on Cost, resulting in 0 rows since no numbers match.
Theta Join = this is the general join everybody uses because it allows you to specify the condition (the ON clause in SQL). You can join on pretty much any condition you like, for example on Products that have the first 2 letters similar, or that have a different price. In practice, this is rarely the case - in 95% of the cases you will join on an equality condition, which leads us to:
Equi Join = the most common one used in practice. The example above is an equi join. Databases are optimized for this type of joins! The oposite of an equi join is a non-equi join, i.e. when you join on a condition other than "=". Databases are not optimized for this! Both of them are subsets of the general theta join. The natural join is also a theta join but the condition (the theta) is implicit.
Source of information: university + certified SQL Server developer + recently completed the MOO "Introduction to databases" from Stanford so I dare say I have relational algebra fresh in mind.
[HttpPost]
public JsonResult DeleteCotnact(int id)
{
using (MycasedbEntities dbde = new MycasedbEntities())
{
Contact rowcontact = (from c in dbde.Contact
where c.Id == id
select c).FirstOrDefault();
dbde.Contact.Remove(rowcontact);
dbde.SaveChanges();
return Json(id);
}
}
What do you think of this, simple or not, you could also try this:
var productrow = cnn.Product.Find(id);
cnn.Product.Remove(productrow);
cnn.SaveChanges();
This question comes up for a number of searches related to hex color so I will add a summary here.
Hex colors take the form RRGGBB
or AARRGGBB
(alpha, red, green, blue). In my experience, when using an int
directly, you need to use the full AARRGGBB
form. If you only have the RRGGBB
form then just prefix it with FF
to make the alpha (transparency) fully opaque. Here is how you would set it in code. Using 0x
at the beginning means it is hexadecimal and not base 10.
int myColor = 0xFF3F51B5;
myView.setBackgroundColor(myColor);
As others have noted, you can use Color.parseColor
like so
int myColor = Color.parseColor("#3F51B5");
myView.setBackgroundColor(myColor);
Note that the String must start with a #
. Both RRGGBB
and AARRGGBB
formats are supported.
You should actually be getting your colors from XML whenever possible. This is the recommended option because it makes it much easier to make color changes to your app. If you set a lot of hex colors throughout your code then it is a big pain to try to change them later.
Android material design has color palates with the hex values already configured.
These theme colors are used throughout your app and look like this:
colors.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<color name="primary">#3F51B5</color>
<color name="primary_dark">#303F9F</color>
<color name="primary_light">#C5CAE9</color>
<color name="accent">#FF4081</color>
<color name="primary_text">#212121</color>
<color name="secondary_text">#757575</color>
<color name="icons">#FFFFFF</color>
<color name="divider">#BDBDBD</color>
</resources>
If you need additional colors, a good practice to follow is to define your color in two steps in xml. First name the the hex value color and then name a component of your app that should get a certain color. This makes it easy to adjust the colors later. Again, this is in colors.xml.
<color name="orange">#fff3632b</color>
<color name="my_view_background_color">@color/orange</color>
Then when you want to set the color in code, do the following:
int myColor = ContextCompat.getColor(context, R.color.my_view_background_color);
myView.setBackgroundColor(myColor);
The Color class comes with a number of predefined color constants. You can use it like this.
int myColor = Color.BLUE;
myView.setBackgroundColor(myColor);
Other colors are
Color.BLACK
Color.BLUE
Color.CYAN
Color.DKGRAY
Color.GRAY
Color.GREEN
Color.LTGRAY
Color.MAGENTA
Color.RED
Color.TRANSPARENT
Color.WHITE
Color.YELLOW
At a minimum, change this:
function BlockID() {
var IDs = new Array();
images['s'] = "Images/Block_01.png";
images['g'] = "Images/Block_02.png";
images['C'] = "Images/Block_03.png";
images['d'] = "Images/Block_04.png";
return IDs;
}
To this:
function BlockID() {
var IDs = new Object();
IDs['s'] = "Images/Block_01.png";
IDs['g'] = "Images/Block_02.png";
IDs['C'] = "Images/Block_03.png";
IDs['d'] = "Images/Block_04.png";
return IDs;
}
There are a couple fixes to point out. First, images
is not defined in your original function, so assigning property values to it will throw an error. We correct that by changing images
to IDs
. Second, you want to return an Object
, not an Array
. An object can be assigned property values akin to an associative array or hash -- an array cannot. So we change the declaration of var IDs = new Array();
to var IDs = new Object();
.
After those changes your code will run fine, but it can be simplified further. You can use shorthand notation (i.e., object literal property value shorthand) to create the object and return it immediately:
function BlockID() {
return {
"s":"Images/Block_01.png"
,"g":"Images/Block_02.png"
,"C":"Images/Block_03.png"
,"d":"Images/Block_04.png"
};
}
Until PHP 5.3, const
could not be used in the global scope. You could only use this from within a class. This should be used when you want to set some kind of constant option or setting that pertains to that class. Or maybe you want to create some kind of enum.
define
can be used for the same purpose, but it can only be used in the global scope. It should only be used for global settings that affect the entire application.
An example of good const
usage is to get rid of magic numbers. Take a look at PDO's constants. When you need to specify a fetch type, you would type PDO::FETCH_ASSOC
, for example. If consts were not used, you'd end up typing something like 35
(or whatever FETCH_ASSOC
is defined as). This makes no sense to the reader.
An example of good define
usage is maybe specifying your application's root path or a library's version number.
It's also much more better to not modify the app/config/database.php
file itself... otherwise modify .env
file and put your DB info there. (.env
file is available in Laravel 5, not sure if it was there in previous versions...)
NOTE: Of course you should have already set mysql
as your default database connection in the app/config/database.php
file.
Try with the below code it`s working for me.
public static String decrypt(String encrypted) throws NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException, InvalidAlgorithmParameterException, IllegalBlockSizeException, BadPaddingException, UnsupportedEncodingException {
byte[] key = your Key in byte array;
byte[] input = salt in byte array;
SecretKeySpec skeySpec = new SecretKeySpec(key, "AES");
IvParameterSpec ivSpec = new IvParameterSpec(input);
Cipher ecipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
ecipher.init(Cipher.DECRYPT_MODE, skeySpec, ivSpec);
byte[] raw = Base64.decode(encrypted, Base64.DEFAULT);
byte[] originalBytes = ecipher.doFinal(raw);
String original = new String(originalBytes, "UTF8");
return original;
}
If you want to pass a parameter to onCreate() then you have to create a new intent with adding extra and call StartActivity with it. Here is a simple example which i did using this way.
String eczSabit = sa.getItem(position).getValue();
if(!Util.IsNullOrEmpty(eczSabit)){
sabit = Long.parseLong(eczSabit);
Intent intent = new Intent(eczaneSegmentasyon.this,eczaneSegmentasyon.class);
intent.putExtra("sabit", sabit);
startActivity(intent);
}
I will suggest something totally different, we used it at work for many years ago on real computers and it worked perfect.
Boot both old and new machine on linux rescue Cd.
read the disk from one, and write it down to the other one, block by block, effectively copying the dist over the network.
You have to play around a little bit with the command line, but it worked so well that both machine complained about IP-conflict when they both booted :-) :-)
cat /dev/sda | ssh user@othermachine cat - > /dev/sda
The previous functions didn't work for me, so I've made another function that use the same logic of one of the answers above: parse the formula in the cell to find the referenced range of cells to examine and than look for the coloured cells. You can find a detailed description here: Google Script count coloured with reference, but the code is below:
function countColoured(reference) {
var sheet = SpreadsheetApp.getActiveSheet();
var formula = SpreadsheetApp.getActiveRange().getFormula();
var args = formula.match(/=\w+\((.*)\)/i)[1].split('!');
try {
if (args.length == 1) {
var range = sheet.getRange(args[0]);
}
else {
sheet = ss.getSheetByName(args[0].replace(/'/g, ''));
range = sheet.getRange(args[1]);
}
}
catch(e) {
throw new Error(args.join('!') + ' is not a valid range');
}
var c = 0;
var numRows = range.getNumRows();
var numCols = range.getNumColumns();
for (var i = 1; i <= numRows; i++) {
for (var j = 1; j <= numCols; j++) {
c = c + ( range.getCell(i,j).getBackground() == "#ffffff" ? 0 : 1 );
}
}
return c > 0 ? c : "" ;
}
You have declared your function as friend
. It's not a member of the class. You should remove Matrix::
from the implementation. friend
means that the specified function (which is not a member of the class) can access private member variables. The way you implemented the function is like an instance method for Matrix
class which is wrong.
I wanted the date to be shown in the type='time' field.
The normal conversion skips the zeros and the form field does not show the value and puts forth an error in the console saying the format needs to be yyyy-mm-dd.
Hence I added a small statement (check)?(true):(false) as follows:
makeShortDate=(date)=>{
yy=date.getFullYear()
mm=date.getMonth()
dd=date.getDate()
shortDate=`${yy}-${(mm<10)?0:''}${mm+1}-${(dd<10)?0:''}${dd}`;
return shortDate;
}
The following code works
<html>
<head>
<script type="text/javascript" src="jquery.js"></script>
<script type="text/javascript">
function AddRow()
{
$('#myTable').append('<tr><td>test 2</td></tr>')
}
</script>
<title></title>
</head>
<body>
<input type="button" id="btnAdd" onclick="AddRow()"/>
<a href="">test</a>
<table id="myTable">
<tbody >
<tr>
<td>
test
</td>
</tr>
</tbody>
</table>
</body>
</html>
Note this will work as of jQuery 1.4 even if the table includes a <tbody>
element:
jQuery since version 1.4(?) automatically detects if the element you are trying to insert (using any of the append(), prepend(), before(), or after() methods) is a
<tr>
and inserts it into the first<tbody>
in your table or wraps it into a new<tbody>
if one doesn't exist.
If you want to work with JAX-RS (e.g. RESTEasy) try this:
@Path("/pic")
public Response get(@QueryParam("url") final String url) {
String picUrl = URLDecoder.decode(url, "UTF-8");
return Response.ok(sendPicAsStream(picUrl))
.header(HttpHeaders.CONTENT_TYPE, "image/jpg")
.build();
}
private StreamingOutput sendPicAsStream(String picUrl) {
return output -> {
try (InputStream is = (new URL(picUrl)).openStream()) {
ByteStreams.copy(is, output);
}
};
}
using javax.ws.rs.core.Response
and com.google.common.io.ByteStreams
There are many reasons to discourage including a .cpp file, but it isn't strictly disallowed. Your example should compile fine.
The problem is probably that you're compiling both main.cpp and foop.cpp, which means two copies of foop.cpp are being linked together. The linker is complaining about the duplication.
Basically you can’t put an icon inside of a textInput but you can fake it by wrapping it inside a view and setting up some simple styling rules.
Here's how it works:
Code:
<View style={styles.passwordContainer}>
<TextInput
style={styles.inputStyle}
autoCorrect={false}
secureTextEntry
placeholder="Password"
value={this.state.password}
onChangeText={this.onPasswordEntry}
/>
<Icon
name='what_ever_icon_you_want'
color='#000'
size={14}
/>
</View>
Style:
passwordContainer: {
flexDirection: 'row',
borderBottomWidth: 1,
borderColor: '#000',
paddingBottom: 10,
},
inputStyle: {
flex: 1,
},
(Note: the icon is underneath the TextInput so it appears on the far right, if it was above TextInput it would appear on the left.)
The type and definition of foreign key field and reference must be equal. This means your foreign key disallows changing the type of your field.
One solution would be this:
LOCK TABLES
favorite_food WRITE,
person WRITE;
ALTER TABLE favorite_food
DROP FOREIGN KEY fk_fav_food_person_id,
MODIFY person_id SMALLINT UNSIGNED;
Now you can change you person_id
ALTER TABLE person MODIFY person_id SMALLINT UNSIGNED AUTO_INCREMENT;
recreate foreign key
ALTER TABLE favorite_food
ADD CONSTRAINT fk_fav_food_person_id FOREIGN KEY (person_id)
REFERENCES person (person_id);
UNLOCK TABLES;
EDIT: Added locks above, thanks to comments
You have to disallow writing to the database while you do this, otherwise you risk data integrity problems.
I've added a write lock above
All writing queries in any other session than your own ( INSERT, UPDATE, DELETE
) will wait till timeout or UNLOCK TABLES
; is executed
http://dev.mysql.com/doc/refman/5.5/en/lock-tables.html
EDIT 2: OP asked for a more detailed explanation of the line "The type and definition of foreign key field and reference must be equal. This means your foreign key disallows changing the type of your field."
From MySQL 5.5 Reference Manual: FOREIGN KEY Constraints
Corresponding columns in the foreign key and the referenced key must have similar internal data types inside InnoDB so that they can be compared without a type conversion. The size and sign of integer types must be the same. The length of string types need not be the same. For nonbinary (character) string columns, the character set and collation must be the same.
If you like the pipe mode, this is the most clean solution:
tar c some-dir | xz > some-dir.tar.xz
It's not necessary to put the f
option in order to deal with files and then to use -
to specify that the file is the standard input. It's also not necessary to specify the -z
option for xz
, because it's default.
It works with gzip
and bzip2
too:
tar c some-dir | gzip > some-dir.tar.gz
or
tar c some-dir | bzip2 > some-dir.tar.bz2
Decompressing is also quite straightforward:
xzcat tarball.tar.xz | tar x
bzcat tarball.tar.bz2 | tar x
zcat tarball.tar.gz | tar x
If you have only tar
archive, you can use cat
:
cat archive.tar | tar x
If you need to list the files only, use tar t
.
I had a ton of trouble with this and then found a great solution:
Create a file in a text editor called whoami.php with the below code as it's content, save the file and upload it to public_html (or whatever you root of your webserver directory is named). It should output a useful string that you can use to track down the user the webserver is running as, my output was "php is running as user: nt authority\iusr" which allowed me to track down the permissions I needed to modify to the user "IUSR".
<?php
// outputs the username that owns the running php/httpd process
// (on a system with the "whoami" executable in the path)
echo 'php is running as user: ' . exec('whoami');
?>
For Android Studio 3.2.1 Update your
Gradle Version 4.6
Android plugin version 3.2.1
Do this:
box-shadow: 0 4px 2px -2px gray;
It's actually much simpler, whatever you set the blur to (3rd value), set the spread (4th value) to the negative of it.
The following is a complete example based on JeeBee's post, using java enum's instead of using a custom method.
Note that in Java SE 7 and later you can use a String object in the switch statement's expression instead.
public class Main {
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
String current = args[0];
Days currentDay = Days.valueOf(current.toUpperCase());
switch (currentDay) {
case MONDAY:
case TUESDAY:
case WEDNESDAY:
System.out.println("boring");
break;
case THURSDAY:
System.out.println("getting better");
case FRIDAY:
case SATURDAY:
case SUNDAY:
System.out.println("much better");
break;
}
}
public enum Days {
MONDAY,
TUESDAY,
WEDNESDAY,
THURSDAY,
FRIDAY,
SATURDAY,
SUNDAY
}
}
Since you are interested in catching network related errors and HTTP errors, the following provides a better approach:
function curl_error_test($url) {
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$responseBody = curl_exec($ch);
/*
* if curl_exec failed then
* $responseBody is false
* curl_errno() returns non-zero number
* curl_error() returns non-empty string
* which one to use is up too you
*/
if ($responseBody === false) {
return "CURL Error: " . curl_error($ch);
}
$responseCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
/*
* 4xx status codes are client errors
* 5xx status codes are server errors
*/
if ($responseCode >= 400) {
return "HTTP Error: " . $responseCode;
}
return "No CURL or HTTP Error";
}
Tests:
curl_error_test("http://expamle.com"); // CURL Error: Could not resolve host: expamle.com
curl_error_test("http://example.com/whatever"); // HTTP Error: 404
curl_error_test("http://example.com"); // No CURL or HTTP Error
You can use date filter to convert in date and display in specific format.
In .ts file (typescript):
let dateString = '1968-11-16T00:00:00'
let newDate = new Date(dateString);
In HTML:
{{dateString | date:'MM/dd/yyyy'}}
Below are some formats which you can implement :
Backend:
public todayDate = new Date();
HTML :
<select>
<option value=""></option>
<option value="MM/dd/yyyy">[{{todayDate | date:'MM/dd/yyyy'}}]</option>
<option value="EEEE, MMMM d, yyyy">[{{todayDate | date:'EEEE, MMMM d, yyyy'}}]</option>
<option value="EEEE, MMMM d, yyyy h:mm a">[{{todayDate | date:'EEEE, MMMM d, yyyy h:mm a'}}]</option>
<option value="EEEE, MMMM d, yyyy h:mm:ss a">[{{todayDate | date:'EEEE, MMMM d, yyyy h:mm:ss a'}}]</option>
<option value="MM/dd/yyyy h:mm a">[{{todayDate | date:'MM/dd/yyyy h:mm a'}}]</option>
<option value="MM/dd/yyyy h:mm:ss a">[{{todayDate | date:'MM/dd/yyyy h:mm:ss a'}}]</option>
<option value="MMMM d">[{{todayDate | date:'MMMM d'}}]</option>
<option value="yyyy-MM-ddTHH:mm:ss">[{{todayDate | date:'yyyy-MM-ddTHH:mm:ss'}}]</option>
<option value="h:mm a">[{{todayDate | date:'h:mm a'}}]</option>
<option value="h:mm:ss a">[{{todayDate | date:'h:mm:ss a'}}]</option>
<option value="EEEE, MMMM d, yyyy hh:mm:ss a">[{{todayDate | date:'EEEE, MMMM d, yyyy hh:mm:ss a'}}]</option>
<option value="MMMM yyyy">[{{todayDate | date:'MMMM yyyy'}}]</option>
</select>
Here is a slight improvement on the accepted answer that avoids having to use sapply()
. Also forces non-first characters to lower.
titleCase <- Vectorize(function(x) {
# Split input vector value
s <- strsplit(x, " ")[[1]]
# Perform title casing and recombine
ret <- paste(toupper(substring(s, 1,1)), tolower(substring(s, 2)),
sep="", collapse=" ")
return(ret)
}, USE.NAMES = FALSE)
name <- c("zip CODE", "statE", "final couNt")
titleCase(name)
#> "Zip Code" "State" "Final Count"
There is one more solution to set column Full text to true.
These solution for example didn't work for me
ALTER TABLE news ADD FULLTEXT(headline, story);
My solution.
NEXT STEPS
Refresh
Version of mssql 2014
SQLite doesn't define any particular extension for this, it's your own choice. Personally, I name them with the .sqlite
extension, just so there isn't any ambiguity when I'm looking at my files later.
Please try this code working fine
Uri imageUri = Uri.fromFile(new File("//android_asset/luc.jpeg"));
/* 2) Create a new Intent */
Intent imageEditorIntent = new AdobeImageIntent.Builder(this)
.setData(imageUri)
.build();
You can use built-in function open: I use it in all of my programs in which I need to store some history (Including Calculator, etc.) for example:
#gk-test.py or anything else would do
try: # use the try loop only if you haven't created the history file outside program
username = open("history.txt").readline().strip("\n")
user_age = open("history.txt").readlines()[1].strip("\n")
except FileNotFoundError:
username = input("Enter Username: ")
user_age = input("Enter User's Age: ")
open("history.txt", "w").write(f"{username}\n{user_age}")
#Rest of the code is secret! try it your own!
I would thank to all of them who liked my comments! Thank you for reading this!
This problem was not solved for me by refreshing NuGet Packages or by performing a "Clean" on the project. It was solved by clearing out the "obj" folder manually.
Simply add a class that tells the interval not to do anything. For example: on hover.
var i = 0;_x000D_
this.setInterval(function() {_x000D_
if(!$('#counter').hasClass('pauseInterval')) { //only run if it hasn't got this class 'pauseInterval'_x000D_
console.log('Counting...');_x000D_
$('#counter').html(i++); //just for explaining and showing_x000D_
} else {_x000D_
console.log('Stopped counting');_x000D_
}_x000D_
}, 500);_x000D_
_x000D_
/* In this example, I'm adding a class on mouseover and remove it again on mouseleave. You can of course do pretty much whatever you like */_x000D_
$('#counter').hover(function() { //mouse enter_x000D_
$(this).addClass('pauseInterval');_x000D_
},function() { //mouse leave_x000D_
$(this).removeClass('pauseInterval');_x000D_
}_x000D_
);_x000D_
_x000D_
/* Other example */_x000D_
$('#pauseInterval').click(function() {_x000D_
$('#counter').toggleClass('pauseInterval');_x000D_
});
_x000D_
body {_x000D_
background-color: #eee;_x000D_
font-family: Calibri, Arial, sans-serif;_x000D_
}_x000D_
#counter {_x000D_
width: 50%;_x000D_
background: #ddd;_x000D_
border: 2px solid #009afd;_x000D_
border-radius: 5px;_x000D_
padding: 5px;_x000D_
text-align: center;_x000D_
transition: .3s;_x000D_
margin: 0 auto;_x000D_
}_x000D_
#counter.pauseInterval {_x000D_
border-color: red; _x000D_
}
_x000D_
<!-- you'll need jQuery for this. If you really want a vanilla version, ask -->_x000D_
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>_x000D_
_x000D_
_x000D_
<p id="counter"> </p>_x000D_
<button id="pauseInterval">Pause</button></p>
_x000D_
I've been looking for this fast and easy approach for ages, so I'm posting several versions to introduce as many people to it as possible.
<form name="registrationForm">_x000D_
<input type="range" name="ageInputName" id="ageInputId" value="24" min="1" max="10" onchange="getvalor(this.value);" oninput="ageOutputId.value = ageInputId.value">_x000D_
<input type="text" name="ageOutputName" id="ageOutputId"></input>_x000D_
</form>
_x000D_
Looks like you're already using request
module.
in this case all you need to post multipart/form-data
is to use its form
feature:
var req = request.post(url, function (err, resp, body) {
if (err) {
console.log('Error!');
} else {
console.log('URL: ' + body);
}
});
var form = req.form();
form.append('file', '<FILE_DATA>', {
filename: 'myfile.txt',
contentType: 'text/plain'
});
but if you want to post some existing file from your file system, then you may simply pass it as a readable stream:
form.append('file', fs.createReadStream(filepath));
request
will extract all related metadata by itself.
For more information on posting multipart/form-data
see node-form-data
module, which is internally used by request
.
As @filoxo said, you can use document.querySelectorAll
.
If you know that there is only one element with the class you are looking for, or you are interested only in the first one, you can use:
document.querySelector('.class1.class2');
BTW, while .class1.class2
indicates an element with both classes, .class1 .class2
(notice the whitespace) indicates an hierarchy - and element with class class2
which is inside en element with class class1
:
<div class='class1'>
<div>
<div class='class2'>
:
:
And if you want to force retrieving a direct child, use >
sign (.class1 > .class2
):
<div class='class1'>
<div class='class2'>
:
:
For entire information about selectors:
https://www.w3schools.com/jquery/jquery_ref_selectors.asp
Using Lambda:
new AlertDialog.Builder(this).setMessage(getString(R.string.exit_msg))
.setTitle(getString(R.string.info))
.setPositiveButton(getString(R.string.yes), (arg0, arg1) -> {
moveTaskToBack(true);
finish();
})
.setNegativeButton(getString(R.string.no), (arg0, arg1) -> {
})
.show();
You also need to set level language to support java 8 in your gradle.build:
compileOptions {
targetCompatibility 1.8
sourceCompatibility 1.8
}
var map = new google.maps.Map(document.getElementById("map"),{
mapTypeId: google.maps.MapTypeId.ROADMAP
});
var bounds = new google.maps.LatLngBounds();
for (i = 0; i < locations.length; i++){
marker = new google.maps.Marker({
position: new google.maps.LatLng(locations[i][1], locations[i][2]),
map: map
});
bounds.extend(marker.position);
}
map.fitBounds(bounds);
From inside the Service class:
Intent dialogIntent = new Intent(this, MyActivity.class);
dialogIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(dialogIntent);
Instead of using the placeholder text, you'll want to set the actual text
property of the field to MM/YYYY, set the delegate of the text field and listen for this method:
- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string { // update the text of the label }
Inside that method, you can figure out what the user has typed as they type, which will allow you to update the label accordingly.
You need to use -t
or --tail
option and you need to define your heroku app name.
heroku logs -t --app app_name
try this:
#include <iostream>
using namespace std;
int main()
{
int positiveInteger;
int startingNumber = 1;
cout << "Please input an integer upto 100." << endl;
cin >> positiveInteger;
int result = 0;
for (int i=startingNumber; i <= positiveInteger; i++)
{
result += i;
cout << result;
}
cout << result;
return 0;
}
This is possible using the mergeFunction
parameter of Collectors.toMap(keyMapper, valueMapper, mergeFunction)
:
Map<String, String> phoneBook =
people.stream()
.collect(Collectors.toMap(
Person::getName,
Person::getAddress,
(address1, address2) -> {
System.out.println("duplicate key found!");
return address1;
}
));
mergeFunction
is a function that operates on two values associated with the same key. adress1
corresponds to the first address that was encountered when collecting elements and adress2
corresponds to the second address encountered: this lambda just tells to keep the first address and ignores the second.
You need to include the reference to the assembly System.Web.Mvc in you project.
you may not have the System.Web.Mvc in your C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework.NETFramework\v4.0
So you need to add it and then to include it as reference to your projrect
Here is your code. I'm assuming you're using python 3 based on the your use of print()
and input()
:
import random
def main():
#random.seed() --> don't need random.seed()
#Prompts the user to enter the number of tickets they wish to play.
#python 3 version:
tickets = int(input("How many lottery tickets do you want?\n"))
#Creates the dictionaries "winning_numbers" and "guess." Also creates the variable "winnings" for total amount of money won.
winning_numbers = []
winnings = 0
#Generates the winning lotto numbers.
for i in range(tickets * 5):
#del winning_numbers[:] what is this line for?
randNum = random.randint(1,30)
while randNum in winning_numbers:
randNum = random.randint(1,30)
winning_numbers.append(randNum)
print(winning_numbers)
guess = getguess(tickets)
nummatches = checkmatch(winning_numbers, guess)
print("Ticket #"+str(i+1)+": The winning combination was",winning_numbers,".You matched",nummatches,"number(s).\n")
winningRanks = [0, 0, 10, 500, 20000, 1000000]
winnings = sum(winningRanks[:nummatches + 1])
print("You won a total of",winnings,"with",tickets,"tickets.\n")
#Gets the guess from the user.
def getguess(tickets):
guess = []
for i in range(tickets):
bubble = [int(i) for i in input("What numbers do you want to choose for ticket #"+str(i+1)+"?\n").split()]
guess.extend(bubble)
print(bubble)
return guess
#Checks the user's guesses with the winning numbers.
def checkmatch(winning_numbers, guess):
match = 0
for i in range(5):
if guess[i] == winning_numbers[i]:
match += 1
return match
main()
If only certain files need access to the modules in lib, just add a require statement to the files that need it. For example, if one model needs to access one module, add:
require 'mymodule'
at the top of the model.rb file.
Run this command in the terminal:
docker ps
If docker is not running, you wil get this message:
Error response from daemon: dial unix docker.raw.sock: connect: connection refused
I have found that urllib has some really good code to pick up the system's proxy settings and they happen to be in the correct form to use directly. You can use this like:
import urllib
...
r = requests.get('http://example.org', proxies=urllib.request.getproxies())
It works really well and urllib knows about getting Mac OS X and Windows settings as well.
You should just grab the window by the title bar and snap it to the left side of your screen (close browser) then reopen the browser ans snap it to the top... problem is over.
You can check this like below :
if varDate = "#01/01/0001#" then
' blank date. do something.
else
' Date is not blank. Do some other thing
end if
You are almost there. (note change in the return value of FindWindow declaration). I'd recommend using RegisterWindowMessage in this case so you don't have to worry about the ins and outs of WM_USER.
[DllImport("user32.dll")]
public static extern IntPtr FindWindow(string lpClassName, String lpWindowName);
[DllImport("user32.dll")]
public static extern int SendMessage(IntPtr hWnd, int wMsg, IntPtr wParam, IntPtr lParam);
[DllImport("user32.dll", SetLastError=true, CharSet=CharSet.Auto)]
static extern uint RegisterWindowMessage(string lpString);
public void button1_Click(object sender, EventArgs e)
{
// this would likely go in a constructor because you only need to call it
// once per process to get the id - multiple calls in the same instance
// of a windows session return the same value for a given string
uint id = RegisterWindowMessage("MyUniqueMessageIdentifier");
IntPtr WindowToFind = FindWindow(null, "Form1");
Debug.Assert(WindowToFind != IntPtr.Zero);
SendMessage(WindowToFind, id, IntPtr.Zero, IntPtr.Zero);
}
And then in your Form1 class:
class Form1 : Form
{
[DllImport("user32.dll", SetLastError=true, CharSet=CharSet.Auto)]
static extern uint RegisterWindowMessage(string lpString);
private uint _messageId = RegisterWindowMessage("MyUniqueMessageIdentifier");
protected override void WndProc(ref Message m)
{
if (m.Msg == _messageId)
{
// do stuff
}
base.WndProc(ref m);
}
}
Bear in mind I haven't compiled any of the above so some tweaking may be necessary.
Also bear in mind that other answers warning you away from SendMessage
are spot on. It's not the preferred way of inter module communication nowadays and genrally speaking overriding the WndProc
and using SendMessage/PostMessage
implies a good understanding of how the Win32 message infrastructure works.
But if you want/need to go this route I think the above will get you going in the right direction.
class tile_tree_apple should be defined in a separate .h file.
tta.h:
#include "tile.h"
class tile_tree_apple : public tile
{
public:
tile onDestroy() {return *new tile_grass;};
tile tick() {if (rand()%20==0) return *new tile_tree;};
void onCreate() {health=rand()%5+4; type=TILET_TREE_APPLE;};
tile onUse() {return *new tile_tree;};
};
file tt.h
#include "tile.h"
class tile_tree : public tile
{
public:
tile onDestroy() {return *new tile_grass;};
tile tick() {if (rand()%20==0) return *new tile_tree_apple;};
void onCreate() {health=rand()%5+4; type=TILET_TREE;};
};
another thing: returning a tile and not a tile reference is not a good idea, unless a tile is a primitive or very "small" type.
I logged into developer account and revoked the development certificate. After revoking and downloading the development certificate i double clicked the newly downloaded certificate and this time Private Key was there under development certificate in KeyChain Access.
This is the code which can help u but dont forget to include message ui framewark and include delegates method MFMailComposeViewControllerDelegate
-(void)EmailButtonACtion{
if ([MFMailComposeViewController canSendMail])
{
MFMailComposeViewController *controller = [[MFMailComposeViewController alloc] init];
controller.mailComposeDelegate = self;
[controller.navigationBar setBackgroundImage:[UIImage imageNamed:@"navigation_bg_iPhone.png"] forBarMetrics:UIBarMetricsDefault];
controller.navigationBar.tintColor = [UIColor colorWithRed:51.0/255.0 green:51.0/255.0 blue:51.0/255.0 alpha:1.0];
[controller setSubject:@""];
[controller setMessageBody:@" " isHTML:YES];
[controller setToRecipients:[NSArray arrayWithObjects:@"",nil]];
UIPasteboard *pasteboard = [UIPasteboard generalPasteboard];
UIImage *ui = resultimg.image;
pasteboard.image = ui;
NSData *imageData = [NSData dataWithData:UIImagePNGRepresentation(ui)];
[controller addAttachmentData:imageData mimeType:@"image/png" fileName:@" "];
[self presentViewController:controller animated:YES completion:NULL];
}
else{
UIAlertView *alert=[[UIAlertView alloc] initWithTitle:@"alrt" message:nil delegate:self cancelButtonTitle:@"ok" otherButtonTitles: nil] ;
[alert show];
}
}
-(void)mailComposeController:(MFMailComposeViewController*)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError*)error
{
[MailAlert show];
switch (result)
{
case MFMailComposeResultCancelled:
MailAlert.message = @"Email Cancelled";
break;
case MFMailComposeResultSaved:
MailAlert.message = @"Email Saved";
break;
case MFMailComposeResultSent:
MailAlert.message = @"Email Sent";
break;
case MFMailComposeResultFailed:
MailAlert.message = @"Email Failed";
break;
default:
MailAlert.message = @"Email Not Sent";
break;
}
[self dismissViewControllerAnimated:YES completion:NULL];
[MailAlert show];
}
I found this site useful: http://www.vanseodesign.com/css/vertical-centering/ This worked for me:
HTML
<div id="parent">
<div id="child">Content here</div>
</div>
CSS
#parent {
padding: 5% 0;
}
#child {
padding: 10% 0;
}
And, of course
("ABCD"[2] == 2["ABCD"]) && (2["ABCD"] == 'C') && ("ABCD"[2] == 'C')
The main reason for this was that back in the 70's when C was designed, computers didn't have much memory (64KB was a lot), so the C compiler didn't do much syntax checking. Hence "X[Y]
" was rather blindly translated into "*(X+Y)
"
This also explains the "+=
" and "++
" syntaxes. Everything in the form "A = B + C
" had the same compiled form. But, if B was the same object as A, then an assembly level optimization was available. But the compiler wasn't bright enough to recognize it, so the developer had to (A += C
). Similarly, if C
was 1
, a different assembly level optimization was available, and again the developer had to make it explicit, because the compiler didn't recognize it. (More recently compilers do, so those syntaxes are largely unnecessary these days)
You cannot calculate the differences separately ... what difference would that yield for 7:59 and 8:00 o'clock? Try
import time
time.time()
which gives you the seconds since the start of the epoch.
You can then get the intermediate time with something like
timestamp1 = time.time()
# Your code here
timestamp2 = time.time()
print "This took %.2f seconds" % (timestamp2 - timestamp1)
I found the solution with following steps:
Oracle.DataAcces.dll
reference,C:\windows\assembly\GAC\Oracle.DataAccess\X.XXX.X.XX__89b483f429c47342/oracle.dataaccess.dll
Hope it helps
If you take Erics answer a little further you can actually create a pretty decent implementation of abstract classes, with full support for polymorphism and the ability to call implemented methods from the base class. Let's start with the code:
/**
* The interface defines all abstract methods and extends the concrete base class
*/
interface IAnimal extends Animal {
speak() : void;
}
/**
* The abstract base class only defines concrete methods & properties.
*/
class Animal {
private _impl : IAnimal;
public name : string;
/**
* Here comes the clever part: by letting the constructor take an
* implementation of IAnimal as argument Animal cannot be instantiated
* without a valid implementation of the abstract methods.
*/
constructor(impl : IAnimal, name : string) {
this.name = name;
this._impl = impl;
// The `impl` object can be used to delegate functionality to the
// implementation class.
console.log(this.name + " is born!");
this._impl.speak();
}
}
class Dog extends Animal implements IAnimal {
constructor(name : string) {
// The child class simply passes itself to Animal
super(this, name);
}
public speak() {
console.log("bark");
}
}
var dog = new Dog("Bob");
dog.speak(); //logs "bark"
console.log(dog instanceof Dog); //true
console.log(dog instanceof Animal); //true
console.log(dog.name); //"Bob"
Since the Animal
class requires an implementation of IAnimal
it's impossible to construct an object of type Animal
without having a valid implementation of the abstract methods. Note that for polymorphism to work you need to pass around instances of IAnimal
, not Animal
. E.g.:
//This works
function letTheIAnimalSpeak(animal: IAnimal) {
console.log(animal.name + " says:");
animal.speak();
}
//This doesn't ("The property 'speak' does not exist on value of type 'Animal')
function letTheAnimalSpeak(animal: Animal) {
console.log(animal.name + " says:");
animal.speak();
}
The main difference here with Erics answer is that the "abstract" base class requires an implementation of the interface, and thus cannot be instantiated on it's own.
Please find the below steps.
CMD + <
Run
option from left side.For more information please find the below GIF representation.
Create custom DatePickerDialog
style:
<style name="AppTheme.DatePickerDialog" parent="Theme.MaterialComponents.Light.Dialog">
<item name="android:colorAccent">@color/colorPrimary</item>
<item name="android:colorControlActivated">@color/colorPrimaryDark</item>
<item name="android:buttonBarPositiveButtonStyle">@style/AppTheme.Alert.Button.Positive</item>
<item name="android:buttonBarNegativeButtonStyle">@style/AppTheme.Alert.Button.Negative</item>
<item name="android:buttonBarNeutralButtonStyle">@style/AppTheme.Alert.Button.Neutral</item>
</style>
<style name="AppTheme.Alert.Button.Positive" parent="Widget.MaterialComponents.Button.TextButton">
<item name="android:textColor">@color/buttonPositive</item>
</style>
<style name="AppTheme.Alert.Button.Negative" parent="Widget.MaterialComponents.Button.TextButton">
<item name="android:textColor">@color/buttonNegative</item>
</style>
<style name="AppTheme.Alert.Button.Neutral" parent="Widget.MaterialComponents.Button.TextButton">
<item name="android:textColor">@color/buttonNeutral</item>
</style>
Set custom datePickerDialogTheme
style in app theme:
<style name="AppTheme" parent="Theme.MaterialComponents.Light.NoActionBar">
<item name="android:datePickerDialogTheme">@style/AppTheme.DatePickerDialog</item>
</style>
Set theme programmatically on initialization like this:
val datetime = DatePickerDialog(this, R.style.AppTheme_DatePickerDialog)
How many thousands of users?
I've run some TCP/IP client/server connection tests in the past on Windows 2003 Server and managed more than 70,000 connections on a reasonably low spec VM. (see here for details: http://www.lenholgate.com/blog/2005/10/the-64000-connection-question.html). I would be extremely surprised if Windows 2008 Server is limited to less than 2003 Server and, IMHO, the posting that Cloud links to is too vague to be much use. This kind of question comes up a lot, I blogged about why I don't really think that it's something that you should actually worry about here: http://www.serverframework.com/asynchronousevents/2010/12/one-million-tcp-connections.html.
Personally I'd test it and see. Even if there is no inherent limit in the Windows 2008 Server version that you intend to use there will still be practical limits based on memory, processor speed and server design.
If you want to run some 'generic' tests you can use my multi-client connection test and the associated echo server. Detailed here: http://www.lenholgate.com/blog/2005/11/windows-tcpip-server-performance.html and here: http://www.lenholgate.com/blog/2005/11/simple-echo-servers.html. These are what I used to run my own tests for my server framework and these are what allowed me to create 70,000 active connections on a Windows 2003 Server VM with 760MB of memory.
Edited to add details from the comment below...
If you're already thinking of multiple servers I'd take the following approach.
Use the free tools that I link
to and prove to yourself that you
can create a reasonable number of
connections onto your target OS
(beware of the Windows limits on
dynamic ports which may cause your
client connections to fail, search
for MAX_USER_PORT
).
during development regularly test your actual server with test clients that can create connections and actually 'do something' on the server. This will help to prevent you building the server in ways that restrict its scalability. See here: http://www.serverframework.com/asynchronousevents/2010/10/how-to-support-10000-or-more-concurrent-tcp-connections-part-2-perf-tests-from-day-0.html
For Jersey 1.X
TrustManager[] trustAllCerts = new TrustManager[]{new X509TrustManager() {
public void checkClientTrusted(java.security.cert.X509Certificate[] chain, String authType) throws java.security.cert.CertificateException {}
public void checkServerTrusted(java.security.cert.X509Certificate[] chain, String authType) throws java.security.cert.CertificateException {}
public java.security.cert.X509Certificate[] getAcceptedIssuers() {
// or you can return null too
return new java.security.cert.X509Certificate[0];
}
}};
SSLContext sc = SSLContext.getInstance("TLS");
sc.init(null, trustAllCerts, new SecureRandom());
HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());
HttpsURLConnection.setDefaultHostnameVerifier(new HostnameVerifier() {
public boolean verify(String string, SSLSession sslSession) {
return true;
}
});
If you are looking for a more generalized way to apply to many columns, what you can do is to build a list of column names and pass it as the index of the grouped dataframe. In your case, for example:
columns = ['Y'+str(i) for year in range(1967, 2011)]
df.groupby('Country')[columns].agg('sum')
Create an abstract method, and have each of your enumeration values override it. Since you know the opposite while you're creating it, there's no need to dynamically generate or create it.
It doesn't read nicely though; perhaps a switch
would be more manageable?
public enum Direction {
NORTH(1) {
@Override
public Direction getOppositeDirection() {
return Direction.SOUTH;
}
},
SOUTH(-1) {
@Override
public Direction getOppositeDirection() {
return Direction.NORTH;
}
},
EAST(-2) {
@Override
public Direction getOppositeDirection() {
return Direction.WEST;
}
},
WEST(2) {
@Override
public Direction getOppositeDirection() {
return Direction.EAST;
}
};
Direction(int code){
this.code=code;
}
protected int code;
public int getCode() {
return this.code;
}
public abstract Direction getOppositeDirection();
}
To persist audit data regarding data modifications, you will need to implement a DML Trigger on each table that you are interested in. You will need to create an Audit table, and add code to your triggers to write to this table.
For more details on how to implement DML triggers, refer to this MDSN article http://msdn.microsoft.com/en-us/library/ms191524%28v=sql.105%29.aspx
Use str = ""+a+b+c;
Here the first +
is String
concat, so the result will be a String
. Note where the ""
lies is important.
Or (maybe) better, use a StringBuilder
.
It is good to check whether your network is connected to Internet:
@Suppress("DEPRECATION")
fun isNetworkAvailable(context: Context): Boolean {
try {
val cm = context.getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager
return if (Build.VERSION.SDK_INT > 22) {
val an = cm.activeNetwork ?: return false
val capabilities = cm.getNetworkCapabilities(an) ?: return false
capabilities.hasCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET)
} else {
val a = cm.activeNetworkInfo ?: return false
a.isConnected && (a.type == ConnectivityManager.TYPE_WIFI || a.type == ConnectivityManager.TYPE_MOBILE)
}
} catch (e: Exception) {
e.printStackTrace()
}
return false
}
Caution, member enumeration only works if the collection itself has no member of the same name. So if you had an array of FileInfo objects, you couldn't get an array of file lengths by using
$files.length # evaluates to array length
And before you say "well obviously", consider this. If you had an array of objects with a capacity property then
$objarr.capacity
would work fine UNLESS $objarr were actually not an [Array] but, for example, an [ArrayList]. So before using member enumeration you might have to look inside the black box containing your collection.
(Note to moderators: this should be a comment on rageandqq's answer but I don't yet have enough reputation.)
I guess you can do this in 5 minute without any further IP/port forwarding, for presenting your local websites temporary.
All you need to do it, go to http://ngrok.com Download small tool extract and run that tool as administrator
Enter command
ngrok http 80
You will see it will connect to server and will create a temporary URL for you which you can share to your friend and let him browse localhost or any of its folder.
You can see detailed process here.
How do I access/share xampp or localhost website from another computer
The answers here work to open the page in the same browser window/tab.
However, I wanted the page to open in a new window/tab when they click a button. (tab/window decision depends on the user's browser setting)
So here is how it worked to open the page in new tab/window:
<button type="button" onclick="window.open('http://www.example.com/', '_blank');">View Example Page</button>
It doesn't have to be a button, you can use anywhere. Notice the _blank that is used to open in new tab/window.
Imagine you end up with double dashes, and want to replace them with a single character and not doubles of the replace character. You can just use array split and array filter and array join.
var str = "This-is---a--news-----item----";
Then to replace all dashes with single spaces, you could do this:
var newStr = str.split('-').filter(function(item) {
item = item ? item.replace(/-/g, ''): item
return item;
}).join(' ');
Now if the string contains double dashes, like '----' then array split will produce an element with 3 dashes in it (because it split on the first dash). So by using this line:
item = item ? item.replace(/-/g, ''): item
The filter method removes those extra dashes so the element will be ignored on the filter iteration. The above line also accounts for if item is already an empty element so it doesn't crash on item.replace.
Then when your string join runs on the filtered elements, you end up with this output:
"This is a news item"
Now if you were using something like knockout.js where you can have computer observables. You could create a computed observable to always calculate "newStr" when "str" changes so you'd always have a version of the string with no dashes even if you change the value of the original input string. Basically they are bound together. I'm sure other JS frameworks can do similar things.
Use preg_replace()
and instead of [ \t\n\r]
use \s
:
$output = preg_replace('!\s+!', ' ', $input);
From Regular Expression Basic Syntax Reference:
\d, \w and \s
Shorthand character classes matching digits, word characters (letters, digits, and underscores), and whitespace (spaces, tabs, and line breaks). Can be used inside and outside character classes.
If you compile your project in jar file: you can put your file in resources/files/your_file.text or pdf;
and use this code:
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.*;
public class readFileService(){
private static final Logger LOGGER = LoggerFactory.getLogger(readFileService.class);
public byte[] getFile(){
String filePath="/files/your_file";
InputStream inputStreamFile;
byte[] bytes;
try{
inputStreamFile = this.getClass().getResourceAsStream(filePath);
bytes = new byte[inputStreamFile.available()];
inputStreamFile.read(bytes);
} catch(NullPointerException | IOException e) {
LOGGER.error("Erreur read file "+filePath+" error message :" +e.getMessage());
return null;
}
return bytes;
}
}
Don't know if this will help anyone, but I found it useful for my purposes:
private static IEnumerable<T> PagedIterator<T>(IEnumerable<T> objectList, int PageSize)
{
var page = 0;
var recordCount = objectList.Count();
var pageCount = (int)((recordCount + PageSize)/PageSize);
if (recordCount < 1)
{
yield break;
}
while (page < pageCount)
{
var pageData = objectList.Skip(PageSize*page).Take(PageSize).ToList();
foreach (var rd in pageData)
{
yield return rd;
}
page++;
}
}
To use this you would have some linq query, and pass the result along with the page size into a foreach loop:
var results = from a in dbContext.Authors
where a.PublishDate > someDate
orderby a.Publisher
select a;
foreach(var author in PagedIterator(results, 100))
{
// Do Stuff
}
So this will iterate over each author fetching 100 authors at a time.
IMHO Lookup tables is the way to go, with referential integrity. But only if you avoid "Evil Magic Numbers" by following an example such as this one: Generate enum from a database lookup table using T4
Have Fun!
Normally this error occurs when you invoke java by supplying the wrong arguments/options. In this case it should be the version
option.
java -version
So to double check you can always do java -help
, and see if the option exists. In this case, there is no option such as v
.
This question is rather old, but for those finding it, there's a new possible solution: Neovim contains a full-fledged, first-class terminal emulator, which does exactly what ConqueTerm tried to. Simply run :term <your command here>
.
<C-\><C-n>
will exit term mode back to normal-mode. If you're like me and prefer that escape still exit term mode, you can add this to your nvimrc:
tnoremap <ESC><ESC> <C-\><C-N>
And then hitting ESC twice will exit terminal mode back to normal-mode, so you can manipulate the buffer that the still-running command is writing to.
Though keep in mind, as nvim is under heavy development at the time I'm posting this answer, another way to exit terminal mode may be added. As Ctrl+\Ctrl+n switches to normal mode from almost any mode, I don't expect that this answer will become wrong, but be aware that if it doesn't work, this answer might be out of date.
Here's one reason you shouldn't use it: it's going to piss off most anti-virus programs running on Windows if you're passing the program over to another machine because it's a security threat. Even if your program only consists of a simple cout << "hello world\n"; system("pause");
It's resource heavy and the program gets access to the cmd command, which anti viruses see as a threat.
Or for fun:
>>> ast.literal_eval('[%s]'%','.join(map(repr,s.split())))
['QH', 'QD', 'JC', 'KD', 'JS']
>>>
ast.literal_eval
This works for me: it will update local version to latest
npm uninstall --save-dev angular-cli
npm install --save-dev @angular/cli@latest
npm install
to verify version
ng --version
It's because you have turned on USB debugging in Developer Options. You can create a bug report by holding the power + both volume up and down.
Edit: This is what the forums say:
By pressing Volume up + Volume down + power button, you will feel a vibration after a second or so, that's when the bug reporting initiated.
To disable:
/system/bin/bugmailer.sh must be deleted/renamed.
There should be a folder on your SD card called "bug reports".
Have a look at this thread: http://forum.xda-developers.com/showthread.php?t=2252948
And this one: http://forum.xda-developers.com/showthread.php?t=1405639
Good evening,
The previous clues to get SQLManagementStudio_x64_ENU.exe runing didn't work as stated for me. After a while of searching, trying, retrying again and again, I finally figured it out. When executing SQLManagementStudio_x64_ENU.exe on my Windows seven system, I kept runing into compatibility issues. The trick is to run SQLManagementStudio_x64_ENU.exe in compatibility mode with Windows XP SP2. Edit the installer properties and enable compatibility mode with XP (service pack 2), then you'll be able to access Mr Doug (answered Mar 4 at 15:09) resolution.
Cheers.
Try www.eclipse.org/downloads/packages/eclipse-android-developers-includes-incubating-components/neonrc3
Older versions of JSP did not support the second syntax.
Collections.sort()
lets you pass a custom comparator for ordering. For case insensitive ordering String
class provides a static final comparator called CASE_INSENSITIVE_ORDER
.
So in your case all that's needed is:
Collections.sort(caps, String.CASE_INSENSITIVE_ORDER);
There should be the problem, when you generate the <form>
. I bet the variables $name
, $price
are NULL
or empty string when you echo
them into the value
of the <input>
field. Empty input fields are not sent by the browser, so $_POST
will not have their keys.
Anyway, you can check that with isset()
.
Test variables with the following:
if(isset($_POST['key'])) ? $variable=$_POST['key'] : $variable=NULL
You better set it to NULL
, because
NULL value represents a variable with no value.
Since your files are not yet committed in branch1
:
git stash
git checkout branch2
git stash pop
or
git stash
git checkout branch2
git stash list # to check the various stash made in different branch
git stash apply x # to select the right one
As commented by benjohn (see git stash
man page):
To also stash currently untracked (newly added) files, add the argument
-u
, so:
git stash -u
this could do it:
perl -ne 'if(m/name="(.*?)"/){ print $1 . "\n"; }'
You can do something like req.param('tagId')
$('input').keydown(function(e) {
e.preventDefault();
return false;
});
Just wanted to contribute my version, using regex:
private static final String UNICODE_REGEX = "\\\\u([0-9a-f]{4})";
private static final Pattern UNICODE_PATTERN = Pattern.compile(UNICODE_REGEX);
...
String message = "\u0048\u0065\u006C\u006C\u006F World";
Matcher matcher = UNICODE_PATTERN.matcher(message);
StringBuffer decodedMessage = new StringBuffer();
while (matcher.find()) {
matcher.appendReplacement(
decodedMessage, String.valueOf((char) Integer.parseInt(matcher.group(1), 16)));
}
matcher.appendTail(decodedMessage);
System.out.println(decodedMessage.toString());
For nth highest value,
sort(x, TRUE)[n]
to take output in MySQL you can use if statement SYNTAX:
if(condition,if_true,if_false)
the if_true and if_false can be used to verify and to show output as there is no print statement in the MySQL
using System;
using System.IO;
class Test
{
public static void Main()
{
DriveInfo[] allDrives = DriveInfo.GetDrives();
foreach (DriveInfo d in allDrives)
{
Console.WriteLine("Drive {0}", d.Name);
Console.WriteLine(" Drive type: {0}", d.DriveType);
if (d.IsReady == true)
{
Console.WriteLine(" Volume label: {0}", d.VolumeLabel);
Console.WriteLine(" File system: {0}", d.DriveFormat);
Console.WriteLine(
" Available space to current user:{0, 15} bytes",
d.AvailableFreeSpace);
Console.WriteLine(
" Total available space: {0, 15} bytes",
d.TotalFreeSpace);
Console.WriteLine(
" Total size of drive: {0, 15} bytes ",
d.TotalSize);
}
}
}
}
/*
This code produces output similar to the following:
Drive A:\
Drive type: Removable
Drive C:\
Drive type: Fixed
Volume label:
File system: FAT32
Available space to current user: 4770430976 bytes
Total available space: 4770430976 bytes
Total size of drive: 10731683840 bytes
Drive D:\
Drive type: Fixed
Volume label:
File system: NTFS
Available space to current user: 15114977280 bytes
Total available space: 15114977280 bytes
Total size of drive: 25958948864 bytes
Drive E:\
Drive type: CDRom
The actual output of this code will vary based on machine and the permissions
granted to the user executing it.
*/
The title attribute is meant to give more information. It's not useful for SEO so it's never a good idea to have the same text in the title and alt which is meant to describe the image or input is vs. what it does. for instance:
<button title="prints out hello world">Sample Buttons</button>
<img title="Hms beagle in the straits of magellan" alt="HMS Beagle painting" src="hms-beagle.jpg" />
The title attribute will make a tool tip, but it will be controlled by the browser as far as where it shows up and what it looks like. If you want more control there are third party jQuery options, many css templates such as Bootstrap have built in solutions, and you can also write a simple css solution if you want. check out this w3schools solution.
In my view the most realistic scenario is when tasks have a heavy operation to complete. Shivprasad's approach focuses more on object creation/memory allocation than on computing itself. I made a research calling the following method:
public static double SumRootN(int root)
{
double result = 0;
for (int i = 1; i < 10000000; i++)
{
result += Math.Exp(Math.Log(i) / root);
}
return result;
}
Execution of this method takes about 0.5sec.
I called it 200 times using Parallel:
Parallel.For(0, 200, (int i) =>
{
SumRootN(10);
});
Then I called it 200 times using the old-fashioned way:
List<Task> tasks = new List<Task>() ;
for (int i = 0; i < loopCounter; i++)
{
Task t = new Task(() => SumRootN(10));
t.Start();
tasks.Add(t);
}
Task.WaitAll(tasks.ToArray());
First case completed in 26656ms, the second in 24478ms. I repeated it many times. Everytime the second approach is marginaly faster.
It is enough to do
export class AppWindow extends Window {}
and do
{ provide: 'AppWindow', useValue: window }
to make AOT happy
I try this solution, but only works for me like a RaisePropertyChange("SourceGroupeGridView") when collection changed, that fired for each item add or changed.
The problem is in:
public void EntityViewModelPropertyChanged(object sender, PropertyChangedEventArgs e)
{
NotifyCollectionChangedEventArgs args = new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Reset);
OnCollectionChanged(args);
}
NotifyCollectionChangedAction.Reset this action make a complete rebind of all items in groupedgrid, is equivalent at RaisePropertyChanged. When you use it all groups of gridview refreshed.
IF you, only want to refresh in UI the group of the new item, you don't use Reset action, you will need simulate a Add action in itemproperty with something like this:
void item_PropertyChanged(object sender, PropertyChangedEventArgs e)
{
var index = this.IndexOf((T)sender);
this.RemoveAt(index);
this.Insert(index, (T)sender);
var a = new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Add, sender);
OnCollectionChanged(a);
}
Sorry by my english, and thanks for the base code :), I hope this helps someone ^_^
Enjoi!!
this is php code I used, reply is usually like this:
2 packets transmitted, 2 received, 0% packet loss, time 1089ms
So I used code like this:
$ping_how_many = 2; $ping_result = shell_exec('ping -c '.$ping_how_many.' bing.com'); if( !preg_match('/'.$ping_how_many.' received/',$ping_result) ){ echo 'Bad ping result'. PHP_EOL; // goto next1; }
Not with CSS, no.
$date = new DateTime('now', new DateTimeZone('Asia/Kolkata'));
echo $date->format('d-m-Y H:i:s');
Update
//Also get am/pm in datetime:
echo $date->format('d-m-Y H:i:s a'); // output 30-12-2013 10:16:15 am
For the date format, PHP date() Function is useful.
if your eclipse is auto-closing at startup you may do this: open the properties of your shortcut and add -clean at the end of the path. or do this in cmd : cd C:\PATH_TO_YOUR_ECLIPSE\eclipse -clean like mentioned earlier above comments
In the standard library, there is no cross-platform way to create aware timezones without creating your own timezone class.
On Windows, there's win32timezone.utcnow()
, but that's part of pywin32. I would rather suggest to use the pytz library, which has a constantly updated database of most timezones.
Working with local timezones can be very tricky (see "Further reading" links below), so you may rather want to use UTC throughout your application, especially for arithmetic operations like calculating the difference between two time points.
You can get the current date/time like so:
import pytz
from datetime import datetime
datetime.utcnow().replace(tzinfo=pytz.utc)
Mind that datetime.today()
and datetime.now()
return the local time, not the UTC time, so applying .replace(tzinfo=pytz.utc)
to them would not be correct.
Another nice way to do it is:
datetime.now(pytz.utc)
which is a bit shorter and does the same.
Further reading/watching why to prefer UTC in many cases:
If %x%==1 (
If %y%==1 (
:: both are equal to 1.
)
)
That's for checking if multiple variables equal value. Here's for either variable.
If %x%==1 (
:: true
)
If %x%==0 (
If %y%==1 (
:: true
)
)
If %x%==0 (
If %y%==0 (
:: False
)
)
I just thought of that off the top if my head. I could compact it more.
From the Foundation source code, in CoreGraphics' CGBase.h
:
/* Definition of `CGFLOAT_TYPE', `CGFLOAT_IS_DOUBLE', `CGFLOAT_MIN', and
`CGFLOAT_MAX'. */
#if defined(__LP64__) && __LP64__
# define CGFLOAT_TYPE double
# define CGFLOAT_IS_DOUBLE 1
# define CGFLOAT_MIN DBL_MIN
# define CGFLOAT_MAX DBL_MAX
#else
# define CGFLOAT_TYPE float
# define CGFLOAT_IS_DOUBLE 0
# define CGFLOAT_MIN FLT_MIN
# define CGFLOAT_MAX FLT_MAX
#endif
/* Definition of the `CGFloat' type and `CGFLOAT_DEFINED'. */
typedef CGFLOAT_TYPE CGFloat;
#define CGFLOAT_DEFINED 1
Copyright (c) 2000-2011 Apple Inc.
This is essentially doing:
#if defined(__LP64__) && __LP64__
typedef double CGFloat;
#else
typedef float CGFloat;
#endif
Where __LP64__
indicates whether the current architecture* is 64-bit.
Note that 32-bit systems can still use the 64-bit double
, it just takes more processor time, so CoreGraphics does this for optimization purposes, not for compatibility. If you aren't concerned about performance but are concerned about accuracy, simply use double
.
In Swift, CGFloat
is a struct
wrapper around either Float
on 32-bit architectures or Double
on 64-bit ones (You can detect this at run- or compile-time with CGFloat.NativeType
) and cgFloat.native
.
From the CoreGraphics source code, in CGFloat.swift.gyb
:
public struct CGFloat {
#if arch(i386) || arch(arm)
/// The native type used to store the CGFloat, which is Float on
/// 32-bit architectures and Double on 64-bit architectures.
public typealias NativeType = Float
#elseif arch(x86_64) || arch(arm64)
/// The native type used to store the CGFloat, which is Float on
/// 32-bit architectures and Double on 64-bit architectures.
public typealias NativeType = Double
#endif
*Specifically, long
s and pointers, hence the LP
. See also: http://www.unix.org/version2/whatsnew/lp64_wp.html
There we have another possibility to remove a property value from the CSS.
Like using the replace method in js. But you have to know exactly the ID of the style, or you can write a for loop to detecting that by (count styles on the page, then check if any of those 'includes' or 'match' an !important
value. & you can count also - how much contains them, or just simply write a global [regexp: /str/gi] replacing method)
Mine is very simple, but I attach a jsBin, for example:
https://jsbin.com/geqodeg/edit?html,css,js,output
First I set the body background in CSS for yellow !important
, then I overrided by JS for darkPink.
You can either: Write a server-side script page like PHP, JSP, ASP.net etc to generate this HTML dynamically
or
Setup the web-server that you are using (e.g. Apache) to do exactly that automatically for directories that doesn't contain welcome-page (e.g. index.html)
Specifically in apache read more here: Edit the httpd.conf: http://justlinux.com/forum/showthread.php?s=&postid=502789#post502789 (updated link: https://forums.justlinux.com/showthread.php?94230-Make-apache-list-directory-contents&highlight=502789)
or add the autoindex mod: http://httpd.apache.org/docs/current/mod/mod_autoindex.html
Like this:
import java.util.*;
Set<Integer> a = new HashSet<Integer>();
a.add( 1);
a.add( 2);
a.add( 3);
Or adding from an Array/ or multiple literals; wrap to a list, first.
Integer[] array = new Integer[]{ 1, 4, 5};
Set<Integer> b = new HashSet<Integer>();
b.addAll( Arrays.asList( b)); // from an array variable
b.addAll( Arrays.asList( 8, 9, 10)); // from literals
To get the intersection:
// copies all from A; then removes those not in B.
Set<Integer> r = new HashSet( a);
r.retainAll( b);
// and print; r.toString() implied.
System.out.println("A intersect B="+r);
Hope this answer helps. Vote for it!
I tried git gc
and it resolved my problem.
Here is the link to the official documentation on how to set up custom error views:
https://docs.djangoproject.com/en/stable/topics/http/views/#customizing-error-views
It says to add lines like these in your URLconf (setting them anywhere else will have no effect):
handler404 = 'mysite.views.my_custom_page_not_found_view'
handler500 = 'mysite.views.my_custom_error_view'
handler403 = 'mysite.views.my_custom_permission_denied_view'
handler400 = 'mysite.views.my_custom_bad_request_view'
You can also customise the CSRF error view by modifying the setting CSRF_FAILURE_VIEW
.
It's worth reading the documentation of the default error handlers, page_not_found
, server_error
, permission_denied
and bad_request
. By default, they use these templates if they can find them, respectively: 404.html
, 500.html
, 403.html
, and 400.html
.
So if all you want to do is make pretty error pages, just create those files in a TEMPLATE_DIRS
directory, you don't need to edit URLConf at all. Read the documentation to see which context variables are available.
In Django 1.10 and later, the default CSRF error view uses the template 403_csrf.html
.
Don't forget that DEBUG
must be set to False for these to work, otherwise, the normal debug handlers will be used.
There is an official documentation about how to handle such situations is available here: https://facebook.github.io/react/docs/jsx-in-depth.html#choosing-the-type-at-runtime
Basically it says:
Wrong:
import React from 'react';
import { PhotoStory, VideoStory } from './stories';
const components = {
photo: PhotoStory,
video: VideoStory
};
function Story(props) {
// Wrong! JSX type can't be an expression.
return <components[props.storyType] story={props.story} />;
}
Correct:
import React from 'react';
import { PhotoStory, VideoStory } from './stories';
const components = {
photo: PhotoStory,
video: VideoStory
};
function Story(props) {
// Correct! JSX type can be a capitalized variable.
const SpecificStory = components[props.storyType];
return <SpecificStory story={props.story} />;
}
For Bootstrap v.5
document.querySelectorAll('.form-file-input')
.forEach(el => el.addEventListener('change', e => e.target.parentElement.querySelector('.form-file-text').innerText = e.target.files[0].name));
Affect all file input element. No need to specify elements id.
Another cause is if the user's default database is unavailable.
I had an account that was used for backing up two databases. When the backup user's default database was taken off-line, the "no process on the other end of the pipe" error started.
Disjoint Set Forests allow fast membership queries and union operations and are most famously used in Kruskal's Algorithm for minimum spanning trees.
The really cool thing is that both operations have amortized running time proportional to the inverse of the Ackermann Function, making this the "fastest" non-constant time data structure.
If you want it to check explicit for it to not be false (boolean value) you have to use
if(borrar() !== false)
But in JavaScript we usually use falsy and truthy and you could use
if(!borrar())
but then values 0, '', null, undefined, null and NaN would not generate the alert.
The following values are always falsy:
false,
,0 (zero)
,'' or "" (empty string)
,null
,undefined
,NaN
Everything else is truthy. That includes:
'0' (a string containing a single zero)
,'false' (a string containing the text “false”)
,[] (an empty array)
,{} (an empty object)
,function(){} (an “empty” function)
Source: https://www.sitepoint.com/javascript-truthy-falsy/
As an extra perk to convert any value to true or false (boolean type), use double exclamation mark:
!![] === true
!!'false' === true
!!false === false
!!undefined === false
In PHP DateTime (PHP >= 5.3)
$dt = new DateTime();
$dt->setTimezone(new DateTimeZone('UTC'));
echo $dt->getTimestamp();
I agree with the majority view that external stylesheets are the prefered method.
However, here are some practical exceptions:
Dynamic background images. CSS stylesheets are static files so you need to use an inline style to add a dynamic (from a database, CMS etc...) background-image
style.
If an element needs to be hidden when the page loads, using an external stylesheet for this is not practical, since there will always be some delay before the stylesheet is processed and the element will be visible until that happens. style="display: none;"
is the best way to achieve this.
If an application is going to give the user fine control over a particular CSS value, e.g. text color, then it may be necessary to add this to inline style
elements or in-page <style></style>
blocks. E.g. style="color:#{{ page.color }}"
, or <style> p.themed { color: #{{ page.color }}; }</style>
This is my solution to scroll to the top on a button click.
$(".btn").click(function () {
if ($(this).text() == "Show options") {
$(".tabs").animate(
{
scrollTop: $(window).scrollTop(0)
},
"slow"
);
}
});
The ::
is called scope resolution operator.
Can be used like this:
::
identifier
class-name ::
identifier
namespace ::
identifier
You can read about it here
https://docs.microsoft.com/en-us/cpp/cpp/scope-resolution-operator?view=vs-2017
m = '[[1,2,3],[4,5,6],[7,8,9]]'
m= eval(m.split()[0])
[[1, 2, 3], [4, 5, 6], [7, 8, 9]]
in Package Manager Console, just Type Remove-Migration And Press Enter. It automatically removes the migration.
Tools -> Nuget Package Manager -> Package Manager Console
A similar question was asked here
If you're able to add an external library to your project, you can try Chosen
Here's a sample:
$(".chosen-select").chosen({_x000D_
no_results_text: "Oops, nothing found!"_x000D_
})
_x000D_
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>_x000D_
<script src="https://cdn.rawgit.com/harvesthq/chosen/gh-pages/chosen.jquery.min.js"></script>_x000D_
<link href="https://cdn.rawgit.com/harvesthq/chosen/gh-pages/chosen.min.css" rel="stylesheet"/>_x000D_
_x000D_
<form action="http://httpbin.org/post" method="post">_x000D_
<select data-placeholder="Begin typing a name to filter..." multiple class="chosen-select" name="test">_x000D_
<option value=""></option>_x000D_
<option>American Black Bear</option>_x000D_
<option>Asiatic Black Bear</option>_x000D_
<option>Brown Bear</option>_x000D_
<option>Giant Panda</option>_x000D_
<option>Sloth Bear</option>_x000D_
<option>Sun Bear</option>_x000D_
<option>Polar Bear</option>_x000D_
<option>Spectacled Bear</option>_x000D_
</select>_x000D_
<input type="submit">_x000D_
</form>
_x000D_
One thing I've run into, you have to include JQuery BEFORE you include Chosen or you'll get errors.
I don't think adb pull handles wildcards for multiple files. I ran into the same problem and did this by moving the files to a folder and then pulling the folder.
I found a link doing the same thing. Try following these steps.
You can enter these module class suffixes for any module to better control where it will show or be hidden.
.visible-phone
.visible-tablet
.visible-desktop
.hidden-phone
.hidden-tablet
.hidden-desktop
http://twitter.github.com/bootstrap/scaffolding.html scroll to bottom
Try this one for current selection:
Sub A_SelectAllMakeTable2()
Dim tbl As ListObject
Set tbl = ActiveSheet.ListObjects.Add(xlSrcRange, Selection, , xlYes)
tbl.TableStyle = "TableStyleMedium15"
End Sub
or equivalent of your macro (for Ctrl+Shift+End range selection):
Sub A_SelectAllMakeTable()
Dim tbl As ListObject
Dim rng As Range
Set rng = Range(Range("A1"), Range("A1").SpecialCells(xlLastCell))
Set tbl = ActiveSheet.ListObjects.Add(xlSrcRange, rng, , xlYes)
tbl.TableStyle = "TableStyleMedium15"
End Sub
When you do "git clone git://location", all branches and tags are fetched.
In order to work on top of a specific remote branch, assuming it's the origin remote:
git checkout -b branch origin/branchname
My solution, after nothing else worked, was to go to Keychain Access and delete all "iOS developer" keys/certificates, then let Xcode regenerate them.
Your model is @Messages
, change it to @message
.
To change it like you should use migration:
def change rename_table :old_table_name, :new_table_name end
Of course do not create that file by hand but use rails generator:
rails g migration ChangeMessagesToMessage
That will generate new file with proper timestamp in name in 'db
dir. Then run:
rake db:migrate
And your app should be fine since then.
To print a specific row we have couple of pandas method
loc
- It only get label i.e column name or Featuresiloc
- Here i stands for integer, actually row number ix
- It is a mix of label as well as integerHow to use for specific row
loc
df.loc[row,column]
For first row and all column
df.loc[0,:]
For first row and some specific column
df.loc[0,'column_name']
iloc
For first row and all column
df.iloc[0,:]
For first row and some specific column i.e first three cols
df.iloc[0,0:3]
For input field validation you can do:
<input ng-model="discount" type="number" ng-attr-max="{{discountType == '%' ? 100 : undefined}}">
This will apply the attribute max
to 100
only if discountType
is defined as %
/proc/partitions
will list all the block devices and partitions that the system recognizes. You can then try using file -s <device>
to determine what kind of filesystem is present on the partition, if any.
While testing in the ios8 beta simulator, you may toggle between the "software keyboard" and "hardware keyboard" with ?+K.
UPDATE: Since iOS Simulator 8.0, the shortcut is ?+?+K.