Unix
The commands env, set, and printenv display all environment variables and their values. env and set are also used to set environment variables and are often incorporated directly into the shell. printenv can also be used to print a single variable by giving that variable name as the sole argument to the command.
In Unix, the following commands can also be used, but are often dependent on a certain shell.
export VARIABLE=value # for Bourne, bash, and related shells
setenv VARIABLE value # for csh and related shells
You can have a look at this at
Yes it stops execution so this is generally preferable to HAVING COUNT(*) > 0
which often won't.
With EXISTS
if you look at the execution plan you will see that the actual number of rows coming out of table1
will not be more than 1 irrespective of number of matching records.
In some circumstances SQL Server can convert the tree for the COUNT
query to the same as the one for EXISTS
during the simplification phase (with a semi join and no aggregate operator in sight) an example of that is discussed in the comments here.
For more complicated sub trees than shown in the question you may occasionally find the COUNT
performs better than EXISTS
however. Because the semi join needs only retrieve one row from the sub tree this can encourage a plan with nested loops for that part of the tree - which may not work out optimal in practice.
Set the max-width:1250px;
that is currently on your body on your #container. This way your header will be 100% of his parent (body) :)
Make sure that Kies is installed, but not running.
On your phone make sure you have USB Debugging mode enabled.
If still not successful, disable any Antivirus software.
Shortest - 18 chars (not confuse +=
(mention by OP) with =
more details here)
test.innerHTML=str
var str = '<p>Just some <span>text</span> here</p>';_x000D_
_x000D_
test.innerHTML=str
_x000D_
<div id="test"></div>
_x000D_
I would recommend looking at this article on how to use javascript to handle basic formatting:
function addCommas(nStr)
{
nStr += '';
x = nStr.split('.');
x1 = x[0];
x2 = x.length > 1 ? '.' + x[1] : '';
var rgx = /(\d+)(\d{3})/;
while (rgx.test(x1)) {
x1 = x1.replace(rgx, '$1' + ',' + '$2');
}
return x1 + x2;
}
source: http://www.mredkj.com/javascript/numberFormat.html
While jQuery can make your life easier in a million different ways I would say it's overkill for this. Keep in mind that jQuery can be fairly large and your user's browser needs to download it when you use it on a page.
When ever using jQuery you should step back and ask if it contributes enough to justify the extra overhead of downloading the library.
If you need some sort of advanced formatting (like the localization stuff in the plugin you linked), or you are already including jQuery it might be worth looking at a jQuery plugin.
Side note - check this out if you want to get a chuckle about the over use of jQuery.
use this way in xml
<TextView
android:id="@+id/myText"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Time is precious, so love now."
android:gravity="center"
android:textSize="30dp"
android:textColor="#fff"
/>
It is just an overload. The add
method is from the ArrayList
class. Look that Staff
inherits from it.
I had the same exception, this is how I solved the problem:
Preconditions:
Junit class (and test), that extended another class.
ApplicationContext initialized using spring, that init the project.
The Application context was initialized in @Before method
Solution:
Init the application context from @BeforeClass method, since the parent class also required some classes that were initialized from within the application context.
Hope this will help.
I have created a working code sample with Query Syntax and Method Syntax. I hope it helps the others :)
You can also run the code on .Net Fiddle here:
using System;
using System.Linq;
using System.Collections.Generic;
class Person
{
public int PersonId;
public string car ;
}
class Result
{
public int PersonId;
public List<string> Cars;
}
public class Program
{
public static void Main()
{
List<Person> persons = new List<Person>()
{
new Person { PersonId = 1, car = "Ferrari" },
new Person { PersonId = 1, car = "BMW" },
new Person { PersonId = 2, car = "Audi"}
};
//With Query Syntax
List<Result> results1 = (
from p in persons
group p by p.PersonId into g
select new Result()
{
PersonId = g.Key,
Cars = g.Select(c => c.car).ToList()
}
).ToList();
foreach (Result item in results1)
{
Console.WriteLine(item.PersonId);
foreach(string car in item.Cars)
{
Console.WriteLine(car);
}
}
Console.WriteLine("-----------");
//Method Syntax
List<Result> results2 = persons
.GroupBy(p => p.PersonId,
(k, c) => new Result()
{
PersonId = k,
Cars = c.Select(cs => cs.car).ToList()
}
).ToList();
foreach (Result item in results2)
{
Console.WriteLine(item.PersonId);
foreach(string car in item.Cars)
{
Console.WriteLine(car);
}
}
}
}
Here is the result:
1 Ferrari BMW 2 Audi ----------- 1 Ferrari BMW 2 Audi
Config file:
worker_processes 4; # 2 * Number of CPUs
events {
worker_connections 19000; # It's the key to high performance - have a lot of connections available
}
worker_rlimit_nofile 20000; # Each connection needs a filehandle (or 2 if you are proxying)
# Total amount of users you can serve = worker_processes * worker_connections
more info: Optimizing nginx for high traffic loads
Sounds like you're looking for rbind
:
> a<-matrix(nrow=10,ncol=5)
> b<-matrix(nrow=20,ncol=5)
> dim(rbind(a,b))
[1] 30 5
Similarly, cbind
stacks the matrices horizontally.
I am not entirely sure what you mean by the last question ("Can I do this for matrices of different rows and columns.?")
Here is another approach using CSS transform: skew(45deg)
to produce the cut corner effect. The shape itself involves three elements (1 real and 2 pseudo-elements) as follows:
div
element has overflow: hidden
and produces the left border.:before
pseudo-element which is 20% the height of the parent container and has a skew transform applied to it. This element prodcues the border on the top and cut (slanted) border on the right side.:after
pseudo-element which is 80% the height of the parent (basically, remaining height) and produces the bottom border, the remaining portion of the right border.The output produced is responsive, produces a transparent cut at the top and supports transparent backgrounds.
div {_x000D_
position: relative;_x000D_
height: 100px;_x000D_
width: 200px;_x000D_
border-left: 2px solid beige;_x000D_
overflow: hidden;_x000D_
}_x000D_
div:after,_x000D_
div:before {_x000D_
position: absolute;_x000D_
content: '';_x000D_
width: calc(100% - 2px);_x000D_
left: 0px;_x000D_
z-index: -1;_x000D_
}_x000D_
div:before {_x000D_
height: 20%;_x000D_
top: 0px;_x000D_
border: 2px solid beige;_x000D_
border-width: 2px 3px 0px 0px;_x000D_
transform: skew(45deg);_x000D_
transform-origin: right bottom;_x000D_
}_x000D_
div:after {_x000D_
height: calc(80% - 4px);_x000D_
bottom: 0px;_x000D_
border: 2px solid beige;_x000D_
border-width: 0px 2px 2px 0px;_x000D_
}_x000D_
.filled:before, .filled:after {_x000D_
background-color: beige;_x000D_
}_x000D_
_x000D_
/* Just for demo */_x000D_
_x000D_
div {_x000D_
float: left;_x000D_
color: beige;_x000D_
padding: 10px;_x000D_
transition: all 1s;_x000D_
margin: 10px;_x000D_
}_x000D_
div:hover {_x000D_
height: 200px;_x000D_
width: 300px;_x000D_
}_x000D_
div.filled{_x000D_
color: black;_x000D_
}_x000D_
body{_x000D_
background-image: radial-gradient(circle, #3F9CBA 0%, #153346 100%);_x000D_
}
_x000D_
<div class="cut-corner">Some content</div>_x000D_
<div class="cut-corner filled">Some content</div>
_x000D_
The below is another method to produce the cut corner effect by using linear-gradient
background images. A combination of 3 gradient images (given below) is used:
The output produced is responsive, produces transparent cut and doesn't require any extra elements (real or pseudo). The drawback is that this approach would work only when the background (fill) is a solid color and it is very difficult to produce borders (but still possible as seen in the snippet).
.cut-corner {_x000D_
height: 100px;_x000D_
width: 200px;_x000D_
background-image: linear-gradient(to bottom left, transparent 50%, beige 50%), linear-gradient(beige, beige), linear-gradient(beige, beige);_x000D_
background-size: 25px 25px, 100% 100%, 100% 100%;_x000D_
background-position: 100% 0%, -25px 0%, 100% 25px;_x000D_
background-repeat: no-repeat;_x000D_
}_x000D_
.filled {_x000D_
background-image: linear-gradient(black, black), linear-gradient(black, black), linear-gradient(black, black), linear-gradient(black, black), linear-gradient(to bottom left, transparent calc(50% - 1px), black calc(50% - 1px), black calc(50% + 1px), beige calc(50% + 1px)), linear-gradient(beige, beige), linear-gradient(beige, beige);_x000D_
background-size: 2px 100%, 2px 100%, 100% 2px, 100% 2px, 25px 25px, 100% 100%, 100% 100%;_x000D_
background-position: 0% 0%, 100% 25px, -25px 0%, 0px 100%, 100% 0%, -25px 0%, 100% 25px;_x000D_
}_x000D_
_x000D_
/* Just for demo */_x000D_
_x000D_
*{_x000D_
box-sizing: border-box;_x000D_
}_x000D_
div {_x000D_
float: left;_x000D_
color: black;_x000D_
padding: 10px;_x000D_
transition: all 1s;_x000D_
margin: 10px;_x000D_
}_x000D_
div:hover {_x000D_
height: 200px;_x000D_
width: 300px;_x000D_
}_x000D_
body{_x000D_
background-image: radial-gradient(circle, #3F9CBA 0%, #153346 100%);_x000D_
}
_x000D_
<div class="cut-corner">Some content</div>_x000D_
<div class="cut-corner filled">Some content</div>
_x000D_
Just a tip: using http_response_code is much easier to remember than writing the full header:
http_response_code(301);
header('Location: /option-a');
exit;
Here is my approach to download JSON with plain node, no packages required.
import https from "https";
function get(url, resolve, reject) {
https.get(url, (res) => {
if(res.statusCode === 301 || res.statusCode === 302) {
return get(res.headers.location, resolve, reject)
}
let body = [];
res.on("data", (chunk) => {
body.push(chunk);
});
res.on("end", () => {
try {
// remove JSON.parse(...) for plain data
resolve(JSON.parse(Buffer.concat(body).toString()));
} catch (err) {
reject(err);
}
});
});
}
async function getData(url) {
return new Promise((resolve, reject) => get(url, resolve, reject));
}
// call
getData("some-url-with-redirect").then((r) => console.log(r));
Nor the set
nor the list
has such method join
, string has it:
','.join(set(['a','b','c']))
By the way you should not use name list
for your variables. Give it a list_
, my_list
or some other name because list
is very often used python function.
You don't need the 'values' clause when using a 'select' as your source.
insert into table1 (col1, col2)
select t1.col1, t2.col2 from oldtable1 t1, oldtable2 t2;
The goal here is to remove the given package and its dependencies without breaking another package's dependencies. I use this command:
brew deps [FORMULA] | xargs brew remove --ignore-dependencies && brew missing | xargs brew install
Note: Edited to reflect @alphadogg's helpful comment.
The problem is that static imports from Hamcrest and Mockito have similar names, but return Matchers and real values, respectively.
One work-around is to simply copy the Hamcrest and/or Mockito classes and delete/rename the static functions so they are easier to remember and less show up in the auto complete. That's what I did.
Also, when using mocks, I try to avoid assertThat
in favor other other assertions
and verify
, e.g.
assertEquals(1, 1);
verify(someMock).someMethod(eq(1));
instead of
assertThat(1, equalTo(1));
verify(someMock).someMethod(eq(1));
If you remove the classes from your Favorites in Eclipse, and type out the long name e.g. org.hamcrest.Matchers.equalTo
and do CTRL+SHIFT+M to 'Add Import' then autocomplete will only show you Hamcrest matchers, not any Mockito matchers. And you can do this the other way so long as you don't mix matchers.
In jQuery documentation it says:
The matching text can appear directly within the selected element, in any of that element's descendants, or a combination
Therefore it is not enough that you use :contains()
selector, you also need to check if the text you search for is the direct content of the element you are targeting for, something like that:
function findElementByText(text) {
var jSpot = $("b:contains(" + text + ")")
.filter(function() { return $(this).children().length === 0;})
.parent(); // because you asked the parent of that element
return jSpot;
}
<form id="thisForm" enctype='multipart/form-data'>
<input type="file" name="file" id="file">
</form>
<script>
$(document).on('ready', function(){
$('#file').on('change', function(){
$('#thisForm').submit();
});
});
</script>
So.. I was also looking into this matter and saw that most of the answers here are asking to fade the container element, not the actual background-image. Then a hack crossed my mind. We can give multiple background right? what if we overlay other color and make it transparent, like code below-
background: url("//unsplash.it/500/400") rgb(255, 255, 255, 0.5) no-repeat center;
This code actually works stand alone. Try it. We gave a bg image and asked other white color with transparency on top of the image and Voila. TIP- we can give different colors and transparencies to get different filter kind of effect.
I was debugging an issue with git and needed some very verbose output to figure out what was going wrong. I ended up setting the GIT_TRACE
environment variable:
export GIT_TRACE=1
git add *.txt
You can also use these on the same line:
GIT_TRACE=1 git add *.txt
Output:
14:06:05.508517 git.c:415 trace: built-in: git add test.txt test2.txt
14:06:05.544890 git.c:415 trace: built-in: git config --get oh-my-zsh.hide-dirty
This is typically because you have not set the origin alias on your Git repository.
Try
git remote add origin URL_TO_YOUR_REPO
This will add an alias in your .git/config
file for the remote clone/push/pull site URL. This URL can be found on your repository Overview page.
The tail
program can do this:
ls -lart | tail -n +2
The -n +2
means “start passing through on the second line of output”.
I needed to do the same thing recently. Here's a simple implementation
#wrapper { width:100%; height:100%; position:relative; }_x000D_
#wrapper img { position:absolute; top:0; left:0; width:100%; height:auto; display:block; }_x000D_
#wrapper .top { animation:fadeOut 2s ease-in-out; animation-fill-mode:forwards; }_x000D_
@keyframes fadeOut {_x000D_
0% { opacity:1; }_x000D_
100% { opacity:0; }_x000D_
}
_x000D_
<div id="wrapper">_x000D_
<img src="img1.jpg" class="top" style="z-index:2;">_x000D_
<img src="img2.jpg" style="z-index:1;">_x000D_
</div>
_x000D_
Have you tried height="100%"
in the definition of your iframe ? It seems to do what you seek, if you add height:100%
in the css for "body" (if you do not, 100% will be "100% of your content").
EDIT: do not do this. The height
attribute (as well as the width
one) must have an integer as value, not a string.
If you are using Twig as a standalone component here's some example of how to enable debugging as it's unlikely the dump(variable) function will work straight out of the box
This was found on the link provided by icode4food
$twig = new Twig_Environment($loader, array(
'debug' => true,
// ...
));
$twig->addExtension(new Twig_Extension_Debug());
$app->register(new \Silex\Provider\TwigServiceProvider(), array(
'debug' => true,
'twig.path' => __DIR__.'/views'
));
Based on the previous answers, and cobbled together from various places in stack overflow, here is the solution I came up with which handles the case when you actually want to submit your changes:
window.thisPage = window.thisPage || {};
window.thisPage.isDirty = false;
window.thisPage.closeEditorWarning = function (event) {
if (window.thisPage.isDirty)
return 'It looks like you have been editing something' +
' - if you leave before saving, then your changes will be lost.'
else
return undefined;
};
$("form").on('keyup', 'textarea', // You can use input[type=text] here as well.
function () {
window.thisPage.isDirty = true;
});
$("form").submit(function () {
QC.thisPage.isDirty = false;
});
window.onbeforeunload = window.thisPage.closeEditorWarning;
It's worth noting that IE11 seems to require that the closeEditorWarning
function returns undefined
for it not to show an alert.
Not quite, although generally you can usually use some workaround on one of the forms
[^abc]
, which is character by character not a
or b
or c
, a(?!b)
, which is a
not followed by b
(?<!a)b
, which is b
not preceeded by a
Here documents with the <<-HERE
terminator work well for indented multi-line text strings. It will remove any leading tabs from the here document. (Line terminators will still remain, though.)
cat <<-____HERE
continuation
lines
____HERE
See also http://ss64.com/bash/syntax-here.html
If you need to preserve some, but not all, leading whitespace, you might use something like
sed 's/^ //' <<____HERE
This has four leading spaces.
Two of them will be removed by sed.
____HERE
or maybe use tr
to get rid of newlines:
tr -d '\012' <<-____
continuation
lines
____
(The second line has a tab and a space up front; the tab will be removed by the dash operator before the heredoc terminator, whereas the space will be preserved.)
For wrapping long complex strings over many lines, I like printf
:
printf '%s' \
"This will all be printed on a " \
"single line (because the format string " \
"doesn't specify any newline)"
It also works well in contexts where you want to embed nontrivial pieces of shell script in another language where the host language's syntax won't let you use a here document, such as in a Makefile
or Dockerfile
.
printf '%s\n' >./myscript \
'#!/bin/sh` \
"echo \"G'day, World\"" \
'date +%F\ %T' && \
chmod a+x ./myscript && \
./myscript
You can use cut
to access the second field:
cut -f2
Edit:
Sorry, didn't realise that SVN doesn't use tabs in its output, so that's a bit useless. You can tailor cut
to the output but it's a bit fragile - something like cut -c 10-
would work, but the exact value will depend on your setup.
Another option is something like: sed 's/.\s\+//'
Instead you can try joining tables like,
select
....
from
dkcd
right join
a
, b
This should work
To replace all spaces
:
UPDATE `table` SET `col_name` = REPLACE(`col_name`, ' ', '')
To remove all tabs
characters :
UPDATE `table` SET `col_name` = REPLACE(`col_name`, '\t', '' )
To remove all new line
characters :
UPDATE `table` SET `col_name` = REPLACE(`col_name`, '\n', '')
http://dev.mysql.com/doc/refman/5.0/en/string-functions.html#function_replace
To remove first and last space(s)
of column :
UPDATE `table` SET `col_name` = TRIM(`col_name`)
http://dev.mysql.com/doc/refman/5.0/en/string-functions.html#function_trim
Instance of keyword is helpful when you want to know particular object's instance .
Suppose you are throw exception and when you have catch then perform sum custom operation and then again continue as per your logic (throws or log etc)
Example : 1) User created custom exception "InvalidExtensionsException" and throw it as per logic
2) Now in catch block catch (Exception e) { perform sum logic if exception type is "InvalidExtensionsException"
InvalidExtensionsException InvalidException =(InvalidExtensionsException)e;
3) If you are not checking instance of and exception type is Null pointer exception your code will break.
So your logic should be inside of instance of if (e instanceof InvalidExtensionsException){ InvalidExtensionsException InvalidException =(InvalidExtensionsException)e; }
Above example is wrong coding practice However this example is help you to understand use of instance of it.
You're after the zip function.
Taken directly from the question: How to merge lists into a list of tuples in Python?
>>> list_a = [1, 2, 3, 4]
>>> list_b = [5, 6, 7, 8]
>>> zip(list_a,list_b)
[(1, 5), (2, 6), (3, 7), (4, 8)]
Add only 
 for breaking line, no need to write any CSS or javascript.
textarea{_x000D_
width:300px;_x000D_
height:100px;_x000D_
_x000D_
}
_x000D_
<textarea placeholder='This is a line this 
should be a new line'></textarea>_x000D_
_x000D_
<textarea placeholder=' This is a line _x000D_
_x000D_
should this be a new line?'></textarea>
_x000D_
The problem was that you were using .src
without needing it and
you also needed to differentiate which img
you wanted to change.
function changeImage(a, imgid) {
document.getElementById(imgid).src=a;
}
<div id="main_img">
<img id="img" src="1772031_29_b.jpg">
</div>
<div id="thumb_img">
<img id="1" src='1772031_29_t.jpg' onclick='changeImage("1772031_29_b.jpg", "1");'>
<img id="2" src='1772031_55_t.jpg' onclick='changeImage("1772031_55_b.jpg", "2");'>
<img id="3" src='1772031_53_t.jpg' onclick='changeImage("1772031_53_b.jpg", "3");'>
</div>
Use org.springframework.web.context.request.WebRequest
as a parameter in your controller method, it provides the method getParameterMap()
, the advantage is that you do not tight your application to the Servlet API, the WebRequest is a example of JavaEE pattern Context Object.
For me, view.window
is null on iOS 14.
extension UIViewController {
var topBarHeight: CGFloat {
var top = self.navigationController?.navigationBar.frame.height ?? 0.0
if #available(iOS 13.0, *) {
top += UIApplication.shared.windows.first?.windowScene?.statusBarManager?.statusBarFrame.height ?? 0
} else {
top += UIApplication.shared.statusBarFrame.height
}
return top
}
}
Git has two types of branches: local
and remote
. To use git pull
and git push
as you'd like, you have to tell your local branch (my_test
) which remote branch it's tracking. In typical Git fashion this can be done in both the config file and with commands.
Commands
Make sure you're on your master
branch with
1)git checkout master
then create the new branch with
2)git branch --track my_test origin/my_test
and check it out with
3)git checkout my_test
.
You can then push
and pull
without specifying which local and remote.
However if you've already created the branch then you can use the -u
switch to tell git's push
and pull
you'd like to use the specified local and remote branches from now on, like so:
git pull -u my_test origin/my_test
git push -u my_test origin/my_test
Config
The commands to setup remote branch tracking are fairly straight forward but I'm listing the config way as well as I find it easier if I'm setting up a bunch of tracking branches. Using your favourite editor open up your project's .git/config
and add the following to the bottom.
[remote "origin"]
url = [email protected]:username/repo.git
fetch = +refs/heads/*:refs/remotes/origin/*
[branch "my_test"]
remote = origin
merge = refs/heads/my_test
This specifies a remote called origin
, in this case a GitHub style one, and then tells the branch my_test
to use it as it's remote.
You can find something very similar to this in the config after running the commands above.
Some useful resources:
In Java you can't. Interface has to do with methods and signature, it does not have to do with the internal state of an object -- that is an implementation question. And this makes sense too -- I mean, simply because certain attributes exist, it does not mean that they have to be used by the implementing class. getHeight could actually point to the width variable (assuming that the implementer is a sadist).
(As a note -- this is not true of all languages, ActionScript allows for declaration of pseudo attributes, and I believe C# does too)
Leaving this here for myself,
If I get this error, I probably used const char*
when I should be using char* const
.
This makes the pointer constant, and not the contents of the string.
const char* const
makes it so the value and the pointer is constant also.
nodejs domains is the most up to date way of handling errors in nodejs. Domains can capture both error/other events as well as traditionally thrown objects. Domains also provide functionality for handling callbacks with an error passed as the first argument via the intercept method.
As with normal try/catch-style error handling, is is usually best to throw errors when they occur, and block out areas where you want to isolate errors from affecting the rest of the code. The way to "block out" these areas are to call domain.run with a function as a block of isolated code.
In synchronous code, the above is enough - when an error happens you either let it be thrown through, or you catch it and handle there, reverting any data you need to revert.
try {
//something
} catch(e) {
// handle data reversion
// probably log too
}
When the error happens in an asynchronous callback, you either need to be able to fully handle the rollback of data (shared state, external data like databases, etc). OR you have to set something to indicate that an exception has happened - where ever you care about that flag, you have to wait for the callback to complete.
var err = null;
var d = require('domain').create();
d.on('error', function(e) {
err = e;
// any additional error handling
}
d.run(function() { Fiber(function() {
// do stuff
var future = somethingAsynchronous();
// more stuff
future.wait(); // here we care about the error
if(err != null) {
// handle data reversion
// probably log too
}
})});
Some of that above code is ugly, but you can create patterns for yourself to make it prettier, eg:
var specialDomain = specialDomain(function() {
// do stuff
var future = somethingAsynchronous();
// more stuff
future.wait(); // here we care about the error
if(specialDomain.error()) {
// handle data reversion
// probably log too
}
}, function() { // "catch"
// any additional error handling
});
UPDATE (2013-09):
Above, I use a future that implies fibers semantics, which allow you to wait on futures in-line. This actually allows you to use traditional try-catch blocks for everything - which I find to be the best way to go. However, you can't always do this (ie in the browser)...
There are also futures that don't require fibers semantics (which then work with normal, browsery JavaScript). These can be called futures, promises, or deferreds (I'll just refer to futures from here on). Plain-old-JavaScript futures libraries allow errors to be propagated between futures. Only some of these libraries allow any thrown future to be correctly handled, so beware.
An example:
returnsAFuture().then(function() {
console.log('1')
return doSomething() // also returns a future
}).then(function() {
console.log('2')
throw Error("oops an error was thrown")
}).then(function() {
console.log('3')
}).catch(function(exception) {
console.log('handler')
// handle the exception
}).done()
This mimics a normal try-catch, even though the pieces are asynchronous. It would print:
1
2
handler
Note that it doesn't print '3' because an exception was thrown that interrupts that flow.
Take a look at bluebird promises:
Note that I haven't found many other libraries other than these that properly handle thrown exceptions. jQuery's deferred, for example, don't - the "fail" handler would never get the exception thrown an a 'then' handler, which in my opinion is a deal breaker.
public IEnumerable<string> Appender(IEnumerable<string> strings)
{
List<string> myList = new List<string>();
foreach(string str in strings)
{
myList.Add(str + "roxxors");
}
return myList;
}
or
public IEnumerable<string> Appender(IEnumerable<string> strings)
{
foreach(string str in strings)
{
yield return str + "roxxors";
}
}
using the yield construct, or simply
var newCollection = strings.Select(str => str + "roxxors"); //(*)
or
var newCollection = from str in strings select str + "roxxors"; //(**)
where the two latter use LINQ and (**)
is just syntactic sugar for (*)
.
If you are currently not on branch master, that's super easy:
git branch -f master 1258f0d0aae
This does exactly what you want: It points master
at the given commit, and does nothing else.
If you are currently on master, you need to get into detached head state first. I'd recommend the following two command sequence:
git checkout 1258f0d0aae #detach from master
git branch -f master HEAD #exactly as above
#optionally reattach to master
git checkout master
Be aware, though, that any explicit manipulation of where a branch points has the potential to leave behind commits that are no longer reachable by any branches, and thus become object to garbage collection. So, think before you type git branch -f
!
This method is better than the git reset --hard
approach, as it does not destroy anything in the index or working directory.
In H2, what works for me is:
I code, starting the server like:
server = Server.createTcpServer().start();
That starts the server on localhost
port 9092.
Then, in code, establish a DB connection on the following JDBC URL:
jdbc:h2:tcp://localhost:9092/mem:test;DB_CLOSE_DELAY=-1;MODE=MySQL
While debugging, as a client to inspect the DB I use the one provided by H2, which is good enough, to launch it you just need to launch the following java main separately
org.h2.tools.Console
This will start a web server with an app on 8082, launch a browser on localhost:8082
And then you can enter the previous URL to see the DB
The answer from Joey was not working for me. After executing
echo ^<?xml version="1.0" encoding="utf-8" ?^> > myfile.xml
I got this error bash: syntax error near unexpected token `>'
This solution worked for me:
echo "<?xml version=\"1.0\" encoding=\"utf-8\">" > myfile.txt
I have tried www.wheresmymac.com they are cheap and they have great bandwith so their is low latency. You need teamviewer to log into the virtual system though
I have upvoted @dnuttle's answer, but ended up using the following strategy:
// On doc ready for modern browsers
document.addEventListener('DOMContentLoaded', (e) => {
// Scope all logic related to what you want to achieve by using a function
const waitForMyFunction = () => {
// Use a timeout id to identify your process and purge it when it's no longer needed
let timeoutID;
// Check if your function is defined, in this case by checking its type
if (typeof myFunction === 'function') {
// We no longer need to wait, purge the timeout id
window.clearTimeout(timeoutID);
// 'myFunction' is defined, invoke it with parameters, if any
myFunction('param1', 'param2');
} else {
// 'myFunction' is undefined, try again in 0.25 secs
timeoutID = window.setTimeout(waitForMyFunction, 250);
}
};
// Initialize
waitForMyFunction();
});
It is tested and working! ;)
Gist: https://gist.github.com/dreamyguy/f319f0b2bffb1f812cf8b7cae4abb47c
var objects={...}; this.getAllvalues = function () {
var vls = [];
for (var key in objects) {
vls.push(objects[key]);
}
return vls;
}
Replace this:
StreamWriter file2 = new StreamWriter("c:/file.txt");
with this:
StreamWriter file2 = new StreamWriter("c:/file.txt", true);
true
indicates that it appends text.
There is another way that symbolic links may fail you, as I discovered in my situation. If you have an SELinux system as the server and the symbolic links point to an NFS-mounted folder (other file systems may yield similar symptoms), httpd
may see the wrong contexts and refuse to serve the contents of the target folders.
In my case the SELinux context of /var/www/html
(which you can obtain with ls -Z
) is unconfined_u:object_r:httpd_sys_content_t:s0
. The symbolic links in /var/www/html
will have the same context, but their target's context, being an NFS-mounted folder, are system_u:object_r:nfs_t:s0
.
The solution is to add fscontext=unconfined_u:object_r:httpd_sys_content_t:s0
to the mount
options (e.g. # mount -t nfs -o v3,fscontext=unconfined_u:object_r:httpd_sys_content_t:s0 <IP address>:/<server path> /<mount point>
). rootcontext
is irrelevant and defcontext
is rejected by NFS. I did not try context
by itself.
function send() {_x000D_
setTimeout(function() {_x000D_
window.open("mailto:" + document.getElementById('email').value + "?subject=" + document.getElementById('subject').value + "&body=" + document.getElementById('message').value);_x000D_
}, 320);_x000D_
}
_x000D_
input {_x000D_
text-align: center;_x000D_
border-top: none;_x000D_
border-right: none;_x000D_
border-left: none;_x000D_
height: 10vw;_x000D_
font-size: 2vw;_x000D_
width: 100vw;_x000D_
}_x000D_
_x000D_
textarea {_x000D_
text-align: center;_x000D_
border-top: none;_x000D_
border-right: none;_x000D_
border-left: none;_x000D_
border-radius: 5px;_x000D_
width: 100vw;_x000D_
height: 50vh;_x000D_
font-size: 2vw;_x000D_
}_x000D_
_x000D_
button {_x000D_
border: none;_x000D_
background-color: white;_x000D_
position: fixed;_x000D_
right: 5px;_x000D_
top: 5px;_x000D_
transition: transform .5s;_x000D_
}_x000D_
_x000D_
input:focus {_x000D_
outline: none;_x000D_
color: orange;_x000D_
border-radius: 3px;_x000D_
}_x000D_
_x000D_
textarea:focus {_x000D_
outline: none;_x000D_
color: orange;_x000D_
border-radius: 7px;_x000D_
}_x000D_
_x000D_
button:focus {_x000D_
outline: none;_x000D_
transform: scale(0);_x000D_
transform: rotate(360deg);_x000D_
}
_x000D_
<!DOCTYPE html>_x000D_
<html>_x000D_
_x000D_
<head>_x000D_
<title>Send Email</title>_x000D_
</head>_x000D_
_x000D_
<body align=center>_x000D_
<input id="email" type="email" placeholder="[email protected]"></input><br><br>_x000D_
<input id="subject" placeholder="Subject"></input><br>_x000D_
<textarea id="message" placeholder="Message"></textarea><br>_x000D_
<button id="send" onclick="send()"><img src=https://www.dropbox.com/s/chxcszvnrdjh1zm/send.png?dl=1 width=50px height=50px></img></button>_x000D_
</body>_x000D_
_x000D_
</html>
_x000D_
You need two backslashes before the dot, one to escape the slash so it gets through, and the other to escape the dot so it becomes literal. Forward slashes and asterisk are treated literal.
str=xpath.replaceAll("\\.", "/*/"); //replaces a literal . with /*/
An alternative that also has the added benefit of easily logging its output:
hexs = "13 00 00 00 08 00"
logging.debug(hexs)
key = bytearray.fromhex(hexs)
allows you to do easy substitutions like so:
hexs = "13 00 00 00 08 {:02X}".format(someByte)
logging.debug(hexs)
key = bytearray.fromhex(hexs)
Useful link to understand static keyword https://www.codeguru.com/java/tij/tij0037.shtml#Heading79
NDepend was already mentioned by Jesse (if you analyze .NET code) but let's explain exactly how it can help.
Is there a program/script that can scan an executable for DLL dependencies or execute the program in a "clean" DLL-free environment for testing to prevent these oops situations?
In the NDepend Project Properties panel, you can define what application assemblies to analyze (in green) and NDepend will infer Third-Party assemblies used by application ones (in blue). A list of directories where to search application and third-party assemblies is provided.
If a third-party assembly is not found in these directories, it will be in error mode. For example, if I remove the .NET Fx directory C:\WINDOWS\Microsoft.NET\Framework\v4.0.30319
, I can see that .NET Fx third-party assemblies are not resolved:
Disclaimer: I work for NDepend
If you want to change a color quickly (and you don't have Hex numbers memorized) android has a few preset colors you can access like this:
android:background="@android:color/black"
There are 15 colors you can choose from which is nice for testing things out quickly, and you don't need to set up additional files.
Setting up a values/colors.xml file and using straight Hex like explained above will still work.
matcher.find()
does not find all matches, only the next match.
long matches = matcher.results().count();
You'll have to do the following. (Starting from Java 9, there is a nicer solution)
int count = 0;
while (matcher.find())
count++;
Btw, matcher.groupCount()
is something completely different.
Complete example:
import java.util.regex.*;
class Test {
public static void main(String[] args) {
String hello = "HelloxxxHelloxxxHello";
Pattern pattern = Pattern.compile("Hello");
Matcher matcher = pattern.matcher(hello);
int count = 0;
while (matcher.find())
count++;
System.out.println(count); // prints 3
}
}
When counting matches of aa
in aaaa
the above snippet will give you 2.
aaaa
aa
aa
To get 3 matches, i.e. this behavior:
aaaa
aa
aa
aa
You have to search for a match at index <start of last match> + 1
as follows:
String hello = "aaaa";
Pattern pattern = Pattern.compile("aa");
Matcher matcher = pattern.matcher(hello);
int count = 0;
int i = 0;
while (matcher.find(i)) {
count++;
i = matcher.start() + 1;
}
System.out.println(count); // prints 3
Since ECMAScript6, one can use Set :
var myArray = ['A', 'B', 'C'];
var mySet = new Set(myArray);
var hasB = mySet.has('B'); // true
var hasZ = mySet.has('Z'); // false
List_of_input=list(map(int,input (). split ()))
print(List_of_input)
It's for Python3.
This probably isn't relevant any more to this thread, but hopefully helpful to somebody. I've had 500 errors for the past hour as I had a controller return an array not supported by the php version ran on my (crappy) server. Seems trivial but had the hallmarks of a codeigniter error.
I had to use:
class emck_model extends CI_Model {
public function getTiles(){
return array(...);
}
}
Instead of
class emck_model extends CI_Model {
public function getTiles(){
return [...];
}
}
Cheers
Another approach (also for object/array elements within the array1) could be2:
function chkDuplicates(arr,justCheck){
var len = arr.length, tmp = {}, arrtmp = arr.slice(), dupes = [];
arrtmp.sort();
while(len--){
var val = arrtmp[len];
if (/nul|nan|infini/i.test(String(val))){
val = String(val);
}
if (tmp[JSON.stringify(val)]){
if (justCheck) {return true;}
dupes.push(val);
}
tmp[JSON.stringify(val)] = true;
}
return justCheck ? false : dupes.length ? dupes : null;
}
//usages
chkDuplicates([1,2,3,4,5],true); //=> false
chkDuplicates([1,2,3,4,5,9,10,5,1,2],true); //=> true
chkDuplicates([{a:1,b:2},1,2,3,4,{a:1,b:2},[1,2,3]],true); //=> true
chkDuplicates([null,1,2,3,4,{a:1,b:2},NaN],true); //=> false
chkDuplicates([1,2,3,4,5,1,2]); //=> [1,2]
chkDuplicates([1,2,3,4,5]); //=> null
1 needs a browser that supports JSON, or a JSON library if not.
2 edit: function can now be used for simple check or to return an array of duplicate values
^(?!filename).+\.js
works for me
tested against:
A proper explanation for this regex can be found at Regular expression to match string not containing a word?
Look ahead is available since version 1.5 of javascript and is supported by all major browsers
Updated to match filename2.js and 2filename.js but not filename.js
(^(?!filename\.js$).).+\.js
Some code for a variation on this problem. Using the above code got me my click events as needed, but I was then stuck trying to work out which button had been clicked. My scenario is I have a dynamic amount of tab pages. On each tab page are (all dynamically created) 2 charts, 2 DGVs and a pair of radio buttons. Each control has a unique name relative to the tab, but there could be 20 radio buttons with the same name if I had 20 tab pages. The radio buttons switch between which of the 2 graphs and DGVs you get to see. Here is the code for when one of the radio buttons gets checked (There's a nearly identical block that swaps the charts and DGVs back):
Private Sub radioFit_Components_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs)
If sender.name = "radioFit_Components" And sender.visible Then
If sender.checked Then
For Each ctrl As Control In TabControl1.SelectedTab.Controls
Select Case ctrl.Name
Case "embChartSSE_Components"
ctrl.BringToFront()
Case "embChartSSE_Fit_Curve"
ctrl.SendToBack()
Case "dgvFit_Components"
ctrl.BringToFront()
End Select
Next
End If
End If
End Sub
This code will fire for any of the tab pages and swap the charts and DGVs over on any of the tab pages. The sender.visible check is to stop the code firing when the form is being created.
Enclose <img>
in <a>
tag.
<a href="http://www.google.com.pk"><img src="smiley.gif"></a>
it will open link on same tab, and if you want to open link on new tab then use target="_blank"
<a href="http://www.google.com.pk" target="_blank"><img src="smiley.gif"></a>
Use the css height
and width
properties.
For this to work on Mac, you also need to set the button
's border
to none
.
curl -s http://google.com > temp.html
works for curl version 7.19.5 on Ubuntu 9.10 (no progress bar). But if for some reason that does not work on your platform, you could always redirect stderr to /dev/null:
curl http://google.com 2>/dev/null > temp.html
The answers only cover DOM / SAX and a copy paste implementation of a JAXB example.
However, one big area of when you are using XML is missing. In many projects / programs there is a need to store / retrieve some basic data structures. Your program has already a classes for your nice and shiny business objects / data structures, you just want a comfortable way to convert this data to a XML structure so you can do more magic on it (store, load, send, manipulate with XSLT).
This is where XStream shines. You simply annotate the classes holding your data, or if you do not want to change those classes, you configure a XStream instance for marshalling (objects -> xml) or unmarshalling (xml -> objects).
Internally XStream uses reflection, the readObject and readResolve methods of standard Java object serialization.
You get a good and speedy tutorial here:
To give a short overview of how it works, I also provide some sample code which marshalls and unmarshalls a data structure.
The marshalling / unmarshalling happens all in the main
method, the rest is just code to generate some test objects and populate some data to them.
It is super simple to configure the xStream
instance and marshalling / unmarshalling is done with one line of code each.
import java.math.BigDecimal;
import java.util.ArrayList;
import java.util.List;
import com.thoughtworks.xstream.XStream;
public class XStreamIsGreat {
public static void main(String[] args) {
XStream xStream = new XStream();
xStream.alias("good", Good.class);
xStream.alias("pRoDuCeR", Producer.class);
xStream.alias("customer", Customer.class);
Producer a = new Producer("Apple");
Producer s = new Producer("Samsung");
Customer c = new Customer("Someone").add(new Good("S4", 10, new BigDecimal(600), s))
.add(new Good("S4 mini", 5, new BigDecimal(450), s)).add(new Good("I5S", 3, new BigDecimal(875), a));
String xml = xStream.toXML(c); // objects -> xml
System.out.println("Marshalled:\n" + xml);
Customer unmarshalledCustomer = (Customer)xStream.fromXML(xml); // xml -> objects
}
static class Good {
Producer producer;
String name;
int quantity;
BigDecimal price;
Good(String name, int quantity, BigDecimal price, Producer p) {
this.producer = p;
this.name = name;
this.quantity = quantity;
this.price = price;
}
}
static class Producer {
String name;
public Producer(String name) {
this.name = name;
}
}
static class Customer {
String name;
public Customer(String name) {
this.name = name;
}
List<Good> stock = new ArrayList<Good>();
Customer add(Good g) {
stock.add(g);
return this;
}
}
}
Using plain old JavaScript:
var val = "Fish";_x000D_
var sel = document.getElementById('sel');_x000D_
document.getElementById('btn').onclick = function() {_x000D_
var opts = sel.options;_x000D_
for (var opt, j = 0; opt = opts[j]; j++) {_x000D_
if (opt.value == val) {_x000D_
sel.selectedIndex = j;_x000D_
break;_x000D_
}_x000D_
}_x000D_
}
_x000D_
<select id="sel">_x000D_
<option>Cat</option>_x000D_
<option>Dog</option>_x000D_
<option>Fish</option>_x000D_
</select>_x000D_
<button id="btn">Select Fish</button>
_x000D_
But if you really want to use jQuery:
var val = 'Fish';
$('#btn').on('click', function() {
$('#sel').val(val);
});
var val = 'Fish';_x000D_
$('#btn').on('click', function() {_x000D_
$('#sel').val(val);_x000D_
});
_x000D_
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>_x000D_
<select id="sel">_x000D_
<option>Cat</option>_x000D_
<option>Dog</option>_x000D_
<option>Fish</option>_x000D_
</select>_x000D_
<button id="btn">Select Fish</button>
_x000D_
In case your options have value attributes which differ from their text content and you want to select via text content:
<select id="sel">
<option value="1">Cat</option>
<option value="2">Dog</option>
<option value="3">Fish</option>
</select>
<script>
var val = 'Fish';
$('#sel option:contains(' + val + ')').prop({selected: true});
</script>
But if you do have the above set up and want to select by value using jQuery, you can do as before:
var val = 3;
$('#sel').val(val);
For the browsers that support document.querySelector
and the HTMLOptionElement::selected
property, this is a more succinct way of accomplishing this task:
var val = 3;
document.querySelector('#sel [value="' + val + '"]').selected = true;
<select data-bind="value: val">
<option value="1">Cat</option>
<option value="2">Dog</option>
<option value="3">Fish</option>
</select>
<script>
var viewModel = {
val: ko.observable()
};
ko.applyBindings(viewModel);
viewModel.val(3);
</script>
<template id="template" is="dom-bind">
<select value="{{ val }}">
<option value="1">Cat</option>
<option value="2">Dog</option>
<option value="3">Fish</option>
</select>
</template>
<script>
template.val = 3;
</script>
Note: this has not been updated for the final stable release.
<app id="app">
<select [value]="val">
<option value="1">Cat</option>
<option value="2">Dog</option>
<option value="3">Fish</option>
</select>
</app>
<script>
var App = ng.Component({selector: 'app'})
.View({template: app.innerHTML})
.Class({constructor: function() {}});
ng.bootstrap(App).then(function(app) {
app._hostComponent.instance.val = 3;
});
</script>
<div id="app">
<select v-model="val">
<option value="1">Cat</option>
<option value="2">Dog</option>
<option value="3">Fish</option>
</select>
</div>
<script>
var app = new Vue({
el: '#app',
data: {
val: null,
},
mounted: function() {
this.val = 3;
}
});
</script>
Use htmlparser2, its way faster and pretty straightforward. Consult this usage example:
https://www.npmjs.org/package/htmlparser2#usage
And the live demo here:
To answer the part of your question,
what is the use of
\r
?
Many Internet protocols, such as FTP, HTTP and SMTP, are specified in terms of lines delimited by carriage return and newline. So, for example, when sending an email, you might have code such as:
fprintf(socket, "RCPT TO: %s\r\n", recipients);
Or, when a FTP server replies with a permission-denied error:
fprintf(client, "550 Permission denied\r\n");
I was not satisfied with @Abhrabm answer because:
It was only preventing negative numbers from being entered from up/down arrows, whereas user can type negative number from keyboard.
Solution is to prevent with key code:
// Select your input element._x000D_
var number = document.getElementById('number');_x000D_
_x000D_
// Listen for input event on numInput._x000D_
number.onkeydown = function(e) {_x000D_
if(!((e.keyCode > 95 && e.keyCode < 106)_x000D_
|| (e.keyCode > 47 && e.keyCode < 58) _x000D_
|| e.keyCode == 8)) {_x000D_
return false;_x000D_
}_x000D_
}
_x000D_
<form action="" method="post">_x000D_
<input type="number" id="number" min="0" />_x000D_
<input type="submit" value="Click me!"/>_x000D_
</form>
_x000D_
Clarification provided by @Hugh Guiney:
What key codes are being checked:
So this script is preventing invalid key from being entered in input.
I searched this issue 2 years ago, and my google searches leads me again to this question.
Don't waste your time trying to handle this with pure JavaScript. I waste my time trying to make it dd/mm/yyyy
. There's no complete solutions that fits with all browsers. So I recommend to use jQuery
datepicker / momentJS or tell your client to work with the default date format instead
Use profiler module. It gives a very detailed profile.
import profile
profile.run('main()')
it outputs something like:
5 function calls in 0.047 seconds
Ordered by: standard name
ncalls tottime percall cumtime percall filename:lineno(function)
1 0.000 0.000 0.000 0.000 :0(exec)
1 0.047 0.047 0.047 0.047 :0(setprofile)
1 0.000 0.000 0.000 0.000 <string>:1(<module>)
0 0.000 0.000 profile:0(profiler)
1 0.000 0.000 0.047 0.047 profile:0(main())
1 0.000 0.000 0.000 0.000 two_sum.py:2(twoSum)
I've found it very informative.
This issue is caused by the pipeline mode in your Application Pool setting that your web site is set to.
Short
Simple way (bad practice) Add the following to your web.config. See http://www.iis.net/ConfigReference/system.webServer/validation
<system.webServer>
<validation validateIntegratedModeConfiguration="false" />
</system.webServer>
Long If possible, your best bet is to change your application to support the integrated pipelines. There are a number of changes between IIS6 and IIS7.x that will cause this error. You can find details about these changes here http://learn.iis.net/page.aspx/381/aspnet-20-breaking-changes-on-iis-70/.
If you're unable to do that, you'll need to change the App pool which may be more difficult to do depending on your availability to the web server.
Check http://technet.microsoft.com/en-us/library/cc731755(WS.10).aspx for details on changing the App Pool
If you need to create an App Pool with Classic pipelines, take a look at http://technet.microsoft.com/en-us/library/cc731784(WS.10).aspx
If you don't have access to the server to make this change, you'll need to do this through your hosting server and contact them for help.
Feel free to ask questions.
I have found a solution. It is just a workaround to my problem but currently the only solution.
ViewPager PagerAdapter not updating the View
public int getItemPosition(Object object) {
return POSITION_NONE;
}
Does anyone know whether this is a bug or not?
Use a list comprehension:
results = [int(i) for i in results]
e.g.
>>> results = ["1", "2", "3"]
>>> results = [int(i) for i in results]
>>> results
[1, 2, 3]
mysql> SELECT CAST(4 AS DECIMAL(4,3));
+-------------------------+
| CAST(4 AS DECIMAL(4,3)) |
+-------------------------+
| 4.000 |
+-------------------------+
1 row in set (0.00 sec)
mysql> SELECT CAST('4.5s' AS DECIMAL(4,3));
+------------------------------+
| CAST('4.5s' AS DECIMAL(4,3)) |
+------------------------------+
| 4.500 |
+------------------------------+
1 row in set (0.00 sec)
mysql> SELECT CAST('a4.5s' AS DECIMAL(4,3));
+-------------------------------+
| CAST('a4.5s' AS DECIMAL(4,3)) |
+-------------------------------+
| 0.000 |
+-------------------------------+
1 row in set, 1 warning (0.00 sec)
In PostgreSQL, to get the average of multiple (2 to 8) columns in one row just define a set of seven functions called average(). Will produce the average of the non-null columns.
And then just
select *,(r1+r2+r3+r4+r5)/5.0,average(r1,r2,r3,r4,r5) from request;
req_id | r1 | r2 | r3 | r4 | r5 | ?column? | average
--------+----+----+----+----+----+--------------------+--------------------
R12673 | 2 | 5 | 3 | 7 | 10 | 5.4000000000000000 | 5.4000000000000000
R34721 | 3 | 5 | 2 | 1 | 8 | 3.8000000000000000 | 3.8000000000000000
R27835 | 1 | 3 | 8 | 5 | 6 | 4.6000000000000000 | 4.6000000000000000
(3 rows)
update request set r4=NULL where req_id='R34721';
UPDATE 1
select *,(r1+r2+r3+r4+r5)/5.0,average(r1,r2,r3,r4,r5) from request;
req_id | r1 | r2 | r3 | r4 | r5 | ?column? | average
--------+----+----+----+----+----+--------------------+--------------------
R12673 | 2 | 5 | 3 | 7 | 10 | 5.4000000000000000 | 5.4000000000000000
R34721 | 3 | 5 | 2 | | 8 | | 4.5000000000000000
R27835 | 1 | 3 | 8 | 5 | 6 | 4.6000000000000000 | 4.6000000000000000
(3 rows)
select *,(r3+r4+r5)/3.0,average(r3,r4,r5) from request;
req_id | r1 | r2 | r3 | r4 | r5 | ?column? | average
--------+----+----+----+----+----+--------------------+--------------------
R12673 | 2 | 5 | 3 | 7 | 10 | 6.6666666666666667 | 6.6666666666666667
R34721 | 3 | 5 | 2 | | 8 | | 5.0000000000000000
R27835 | 1 | 3 | 8 | 5 | 6 | 6.3333333333333333 | 6.3333333333333333
(3 rows)
Like this:
CREATE OR REPLACE FUNCTION AVERAGE (
V1 NUMERIC,
V2 NUMERIC)
RETURNS NUMERIC
AS $FUNCTION$
DECLARE
COUNT NUMERIC;
TOTAL NUMERIC;
BEGIN
COUNT=0;
TOTAL=0;
IF V1 IS NOT NULL THEN COUNT=COUNT+1; TOTAL=TOTAL+V1; END IF;
IF V2 IS NOT NULL THEN COUNT=COUNT+1; TOTAL=TOTAL+V2; END IF;
RETURN TOTAL/COUNT;
EXCEPTION WHEN DIVISION_BY_ZERO THEN RETURN NULL;
END
$FUNCTION$ LANGUAGE PLPGSQL;
CREATE OR REPLACE FUNCTION AVERAGE (
V1 NUMERIC,
V2 NUMERIC,
V3 NUMERIC)
RETURNS NUMERIC
AS $FUNCTION$
DECLARE
COUNT NUMERIC;
TOTAL NUMERIC;
BEGIN
COUNT=0;
TOTAL=0;
IF V1 IS NOT NULL THEN COUNT=COUNT+1; TOTAL=TOTAL+V1; END IF;
IF V2 IS NOT NULL THEN COUNT=COUNT+1; TOTAL=TOTAL+V2; END IF;
IF V3 IS NOT NULL THEN COUNT=COUNT+1; TOTAL=TOTAL+V3; END IF;
RETURN TOTAL/COUNT;
EXCEPTION WHEN DIVISION_BY_ZERO THEN RETURN NULL;
END
$FUNCTION$ LANGUAGE PLPGSQL;
CREATE OR REPLACE FUNCTION AVERAGE (
V1 NUMERIC,
V2 NUMERIC,
V3 NUMERIC,
V4 NUMERIC)
RETURNS NUMERIC
AS $FUNCTION$
DECLARE
COUNT NUMERIC;
TOTAL NUMERIC;
BEGIN
COUNT=0;
TOTAL=0;
IF V1 IS NOT NULL THEN COUNT=COUNT+1; TOTAL=TOTAL+V1; END IF;
IF V2 IS NOT NULL THEN COUNT=COUNT+1; TOTAL=TOTAL+V2; END IF;
IF V3 IS NOT NULL THEN COUNT=COUNT+1; TOTAL=TOTAL+V3; END IF;
IF V4 IS NOT NULL THEN COUNT=COUNT+1; TOTAL=TOTAL+V4; END IF;
RETURN TOTAL/COUNT;
EXCEPTION WHEN DIVISION_BY_ZERO THEN RETURN NULL;
END
$FUNCTION$ LANGUAGE PLPGSQL;
CREATE OR REPLACE FUNCTION AVERAGE (
V1 NUMERIC,
V2 NUMERIC,
V3 NUMERIC,
V4 NUMERIC,
V5 NUMERIC)
RETURNS NUMERIC
AS $FUNCTION$
DECLARE
COUNT NUMERIC;
TOTAL NUMERIC;
BEGIN
COUNT=0;
TOTAL=0;
IF V1 IS NOT NULL THEN COUNT=COUNT+1; TOTAL=TOTAL+V1; END IF;
IF V2 IS NOT NULL THEN COUNT=COUNT+1; TOTAL=TOTAL+V2; END IF;
IF V3 IS NOT NULL THEN COUNT=COUNT+1; TOTAL=TOTAL+V3; END IF;
IF V4 IS NOT NULL THEN COUNT=COUNT+1; TOTAL=TOTAL+V4; END IF;
IF V5 IS NOT NULL THEN COUNT=COUNT+1; TOTAL=TOTAL+V5; END IF;
RETURN TOTAL/COUNT;
EXCEPTION WHEN DIVISION_BY_ZERO THEN RETURN NULL;
END
$FUNCTION$ LANGUAGE PLPGSQL;
CREATE OR REPLACE FUNCTION AVERAGE (
V1 NUMERIC,
V2 NUMERIC,
V3 NUMERIC,
V4 NUMERIC,
V5 NUMERIC,
V6 NUMERIC)
RETURNS NUMERIC
AS $FUNCTION$
DECLARE
COUNT NUMERIC;
TOTAL NUMERIC;
BEGIN
COUNT=0;
TOTAL=0;
IF V1 IS NOT NULL THEN COUNT=COUNT+1; TOTAL=TOTAL+V1; END IF;
IF V2 IS NOT NULL THEN COUNT=COUNT+1; TOTAL=TOTAL+V2; END IF;
IF V3 IS NOT NULL THEN COUNT=COUNT+1; TOTAL=TOTAL+V3; END IF;
IF V4 IS NOT NULL THEN COUNT=COUNT+1; TOTAL=TOTAL+V4; END IF;
IF V5 IS NOT NULL THEN COUNT=COUNT+1; TOTAL=TOTAL+V5; END IF;
IF V6 IS NOT NULL THEN COUNT=COUNT+1; TOTAL=TOTAL+V6; END IF;
RETURN TOTAL/COUNT;
EXCEPTION WHEN DIVISION_BY_ZERO THEN RETURN NULL;
END
$FUNCTION$ LANGUAGE PLPGSQL;
CREATE OR REPLACE FUNCTION AVERAGE (
V1 NUMERIC,
V2 NUMERIC,
V3 NUMERIC,
V4 NUMERIC,
V5 NUMERIC,
V6 NUMERIC,
V7 NUMERIC)
RETURNS NUMERIC
AS $FUNCTION$
DECLARE
COUNT NUMERIC;
TOTAL NUMERIC;
BEGIN
COUNT=0;
TOTAL=0;
IF V1 IS NOT NULL THEN COUNT=COUNT+1; TOTAL=TOTAL+V1; END IF;
IF V2 IS NOT NULL THEN COUNT=COUNT+1; TOTAL=TOTAL+V2; END IF;
IF V3 IS NOT NULL THEN COUNT=COUNT+1; TOTAL=TOTAL+V3; END IF;
IF V4 IS NOT NULL THEN COUNT=COUNT+1; TOTAL=TOTAL+V4; END IF;
IF V5 IS NOT NULL THEN COUNT=COUNT+1; TOTAL=TOTAL+V5; END IF;
IF V6 IS NOT NULL THEN COUNT=COUNT+1; TOTAL=TOTAL+V6; END IF;
IF V7 IS NOT NULL THEN COUNT=COUNT+1; TOTAL=TOTAL+V7; END IF;
RETURN TOTAL/COUNT;
EXCEPTION WHEN DIVISION_BY_ZERO THEN RETURN NULL;
END
$FUNCTION$ LANGUAGE PLPGSQL;
CREATE OR REPLACE FUNCTION AVERAGE (
V1 NUMERIC,
V2 NUMERIC,
V3 NUMERIC,
V4 NUMERIC,
V5 NUMERIC,
V6 NUMERIC,
V7 NUMERIC,
V8 NUMERIC)
RETURNS NUMERIC
AS $FUNCTION$
DECLARE
COUNT NUMERIC;
TOTAL NUMERIC;
BEGIN
COUNT=0;
TOTAL=0;
IF V1 IS NOT NULL THEN COUNT=COUNT+1; TOTAL=TOTAL+V1; END IF;
IF V2 IS NOT NULL THEN COUNT=COUNT+1; TOTAL=TOTAL+V2; END IF;
IF V3 IS NOT NULL THEN COUNT=COUNT+1; TOTAL=TOTAL+V3; END IF;
IF V4 IS NOT NULL THEN COUNT=COUNT+1; TOTAL=TOTAL+V4; END IF;
IF V5 IS NOT NULL THEN COUNT=COUNT+1; TOTAL=TOTAL+V5; END IF;
IF V6 IS NOT NULL THEN COUNT=COUNT+1; TOTAL=TOTAL+V6; END IF;
IF V7 IS NOT NULL THEN COUNT=COUNT+1; TOTAL=TOTAL+V7; END IF;
IF V8 IS NOT NULL THEN COUNT=COUNT+1; TOTAL=TOTAL+V8; END IF;
RETURN TOTAL/COUNT;
EXCEPTION WHEN DIVISION_BY_ZERO THEN RETURN NULL;
END
$FUNCTION$ LANGUAGE PLPGSQL;
When the return type is void, your method doesn't return anything.
Look again at your code: There's no return in that method. You print to the console and exit.
As the signature from the error message implies, the second argument must be an IEnumerable, more specifically, an IEnumerable of SelectListItem. It is the list of choices. You can use the SelectList type, which is a IEnumerable of SelectListItem. For a list with no choices:
@Html.DropDownList("PriorityID", new List<SelectListItem>(), new {@class="textbox"} )
For a list with a few choices:
@Html.DropDownList(
"PriorityID",
new List<SelectListItem>
{
new SelectListItem { Text = "High", Value = 1 },
new SelectListItem { Text = "Low", Value = 0 },
},
new {@class="textbox"})
Maybe this tutorial can be of help: How to create a DropDownList with ASP.NET MVC
Assuming that the length is same for each array in the second dimension, you can use
public class B {
public static void main(String [] main){
int [] [] nir= new int [2] [3];
System.out.println(nir[0].length);
}
}
When you try to execute a program in unix (one with the executable bit set), the operating system will look at the first few bytes of the file. These form the so-called "magic number", which can be used to decide the format of the program and how to execute it.
#!
corresponds to the magic number 0x2321 (look it up in an ascii table). When the system sees that the magic number, it knows that it is dealing with a text script and reads until the next \n
(there is a limit, but it escapes me atm). Having identified the interpreter (the first argument after the shebang) it will call the interpreter.
Other files also have magic numbers. Try looking at a bitmap (.BMP) file via less
and you will see the first two characters are BM
. This magic number denotes that the file is indeed a bitmap.
Use an html button and javascript? in javascript, window.location
is used to change the url location of the current window, while window.open
will open a new one
<input type="button" onclick="window.open('newPage.aspx', 'newPage');" />
Edit: Ah, just found this: If the ID of your form tag is form1
, set this attribute in your asp button
OnClientClick="form1.target ='_blank';"
As you are already using jQuery, you can use the grep function which is intended for searching an array:
var result = $.grep(myArray, function(e){ return e.id == id; });
The result is an array with the items found. If you know that the object is always there and that it only occurs once, you can just use result[0].foo
to get the value. Otherwise you should check the length of the resulting array. Example:
if (result.length === 0) {
// no result found
} else if (result.length === 1) {
// property found, access the foo property using result[0].foo
} else {
// multiple items found
}
assuming you want the line height to be 20 px
.restart:before {
content: 'First Line';
padding-bottom:20px;
}
.restart:after {
content: 'Second-line';
position:absolute;
top:40px;
}
For storing, you could use a utility method
public static Long persistDate(Date date) {
if (date != null) {
return date.getTime();
}
return null;
}
like so:
ContentValues values = new ContentValues();
values.put(COLUMN_NAME, persistDate(entity.getDate()));
long id = db.insertOrThrow(TABLE_NAME, null, values);
Another utility method takes care of the loading
public static Date loadDate(Cursor cursor, int index) {
if (cursor.isNull(index)) {
return null;
}
return new Date(cursor.getLong(index));
}
can be used like this:
entity.setDate(loadDate(cursor, INDEX));
Ordering by date is simple SQL ORDER clause (because we have a numeric column). The following will order descending (that is newest date goes first):
public static final String QUERY = "SELECT table._id, table.dateCol FROM table ORDER BY table.dateCol DESC";
//...
Cursor cursor = rawQuery(QUERY, null);
cursor.moveToFirst();
while (!cursor.isAfterLast()) {
// Process results
}
Always make sure to store the UTC/GMT time, especially when working with java.util.Calendar
and java.text.SimpleDateFormat
that use the default (i.e. your device's) time zone.
java.util.Date.Date()
is safe to use as it creates a UTC value.
Try chmod u+x testscript.sh
I know it from here: http://www.linuxquestions.org/questions/red-hat-31/running-shell-script-command-not-found-202062/
You can also try find() method. It determines if string str occurs in string, or in a substring of string.
str1 = "please help me out so that I could solve this"
str2 = "please help me out"
if (str1.find(str2)>=0):
print("True")
else:
print ("False")
If you want to use a color from colors.xml , experiment :
public View getView(int position, View convertView, ViewGroup parent) {
...
View rowView = inflater.inflate(this.rowLayoutID, parent, false);
rowView.setBackgroundColor(rowView.getResources().getColor(R.color.my_bg_color));
TextView title = (TextView) rowView.findViewById(R.id.txtRowTitle);
title.setTextColor(
rowView.getResources().getColor(R.color.my_title_color));
...
}
You can use too:
private static final int bgColor = 0xAAAAFFFF;
public View getView(int position, View convertView, ViewGroup parent) {
...
View rowView = inflater.inflate(this.rowLayoutID, parent, false);
rowView.setBackgroundColor(bgColor);
...
}
you can set it in .bashrc
PATH=$PATH:/opt/ActiveTcl-8.5/bin;export PATH;
This workaround helped us so much at my job (Tech Support), we made a simple batch file we could run from anywhere (We didnt have the permissions to install it). This workaround will set the variable and then run OpenSSL for you. It also opens up the bin folder for you (cause this is where any files you create or modify will be saved). Also, this is only for Windows.
Copy this code to a file named StartOpenSSL.bat. Save this to a location of your choice. It can be run from anywhere.
@echo off
title OpenSSL
cd\openssl\bin
if exist "C:\openssl\share\openssl.cnf" (
set OPENSSL_CONF=c:/openssl/share/openssl.cnf
start explorer.exe c:\openssl\bin
echo Welcome to OpenSSL
openssl
) else (
echo Error: openssl.cnf was not found
echo File openssl.cnf needs to be present in c:\openssl\share
pause
)
exit
A connection timeout is the maximum amount of time that the program is willing to wait to setup a connection to another process. You aren't getting or posting any application data at this point, just establishing the connection, itself.
A socket timeout is the timeout when waiting for individual packets. It's a common misconception that a socket timeout is the timeout to receive the full response. So if you have a socket timeout of 1 second, and a response comprised of 3 IP packets, where each response packet takes 0.9 seconds to arrive, for a total response time of 2.7 seconds, then there will be no timeout.
something like
String source = "password";
byte[] byteArray;
try {
byteArray = source.getBytes("UTF-16");
System.out.println(new String(Base64.decode(Base64.encode(byteArray,
Base64.DEFAULT), Base64.DEFAULT)));
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
Beside the methods described in previous answers, you can also use a free execution plan viewer and query optimization tool ApexSQL Plan (which I’ve recently bumped into).
You can install and integrate ApexSQL Plan into SQL Server Management Studio, so execution plans can be viewed from SSMS directly.
Viewing Estimated execution plans in ApexSQL Plan
Viewing Actual execution plans in ApexSQL Plan
To view the Actual execution plan of a query, continue from the 2nd step mentioned previously, but now, once the Estimated plan is shown, click the “Actual” button from the main ribbon bar in ApexSQL Plan.
Once the “Actual” button is clicked, the Actual execution plan will be shown with detailed preview of the cost parameters along with other execution plan data.
More information about viewing execution plans can be found by following this link.
Decision tree:
Frameworks like Qt and SWT need native DLLs. So you have to ask yourself: Are all necessary platforms supported? Can you package the native DLLs with your app?
See here, how to do this for SWT.
If you have a choice here, you should prefer Qt over SWT. Qt has been developed by people who understand UI and the desktop while SWT has been developed out of necessity to make Eclipse faster. It's more a performance patch for Java 1.4 than a UI framework. Without JFace, you're missing many major UI components or very important features of UI components (like filtering on tables).
If SWT is missing a feature that you need, the framework is somewhat hostile to extending it. For example, you can't extend any class in it (the classes aren't final, they just throw exceptions when the package of this.getClass()
isn't org.eclipse.swt
and you can't add new classes in that package because it's signed).
If you need a native, pure Java solution, that leaves you with the rest. Let's start with AWT, Swing, SwingX - the Swing way.
AWT is outdated. Swing is outdated (maybe less so but not much work has been done on Swing for the past 10 years). You could argue that Swing was good to begin with but we all know that code rots. And that's especially true for UIs today.
That leaves you with SwingX. After a longer period of slow progress, development has picked up again. The major drawback with Swing is that it hangs on to some old ideas which very kind of bleeding edge 15 years ago but which feel "clumsy" today. For example, the table views do support filtering and sorting but you still have to configure this. You'll have to write a lot of boiler plate code just to get a decent UI that feels modern.
Another weak area is theming. As of today, there are a lot of themes around. See here for a top 10. But some are slow, some are buggy, some are incomplete. I hate it when I write a UI and users complain that something doesn't work for them because they selected an odd theme.
JGoodies is another layer on top of Swing, like SwingX. It tries to make Swing more pleasant to use. The web site looks great. Let's have a look at the tutorial ... hm ... still searching ... hang on. It seems that there is no documentation on the web site at all. Google to the rescue. Nope, no useful tutorials at all.
I'm not feeling confident with a UI framework that tries so hard to hide the documentation from potential new fans. That doesn't mean JGoodies is bad; I just couldn't find anything good to say about it but that it looks nice.
JavaFX. Great, stylish. Support is there but I feel it's more of a shiny toy than a serious UI framework. This feeling roots in the lack of complex UI components like tree tables. There is a webkit-based component to display HTML.
When it was introduced, my first thought was "five years too late." If your aim is a nice app for phones or web sites, good. If your aim is professional desktop application, make sure it delivers what you need.
Pivot. First time I heard about it. It's basically a new UI framework based on Java2D. So I gave it a try yesterday. No Swing, just tiny bit of AWT (new Font(...)
).
My first impression was a nice one. There is an extensive documentation that helps you getting started. Most of the examples come with live demos (Note: You must have Java enabled in your web browser; this is a security risk) in the web page, so you can see the code and the resulting application side by side.
In my experience, more effort goes into code than into documentation. By looking at the Pivot docs, a lot of effort must have went into the code. Note that there is currently a bug which prevents some of the examples to work (PIVOT-858) in your browser.
My second impression of Pivot is that it's easy to use. When I ran into a problem, I could usually solve it quickly by looking at an example. I'm missing a reference of all the styles which each component supports, though.
As with JavaFX, it's missing some higher level components like a tree table component (PIVOT-306). I didn't try lazy loading with the table view. My impression is that if the underlying model uses lazy loading, then that's enough.
Promising. If you can, give it a try.
The accepted answer does not work. And the highest voted answer does not answer the actual question. With a fixed pixel height header, and a filler in the remaining display of the browser, and scroll for owerflow. Here is a solution that actually works, using absolute positioning. I also assume that the height of the header is known, by the sound of "fixed header" in the question. I use 150px as an example here:
HTML:
<html>
<body>
<div id="Header">
</div>
<div id="Content">
</div>
</body>
</html>
CSS:(adding background-color for visual effect only)
#Header
{
height: 150px;
width: 100%;
background-color: #ddd;
}
#Content
{
position: absolute;
width: 100%;
top: 150px;
bottom: 0;
background-color: #aaa;
overflow-y: scroll;
}
For a more detailed look how this works, with actual content inside the #Content
, have a look at this jsfiddle, using bootstrap rows and columns.
There's native method to work with date
const date = new Date();
let hours = date.getHours();