I got the communications failure error when using a java.sql.PreparedStatement with a specific statement.
This was running against MySQL 5.6, Tomcat 7.0.29 and JDK 1.7.0_67 on a Windows 7 x64 machine.
The cause turned out to be setting an integer to a string parameter and a string to an integer parameter then trying to perform executeQuery on the prepared statement. After I corrected the order of parameter setting the statement performed correctly.
This had nothing to do with network issues as the wording of the error message suggested.
I’ve got a similar problem with MySQL on a Mac (Mac Os X Could not startup MySQL Server. Reason: 255 and also “ERROR! The server quit without updating PID file”). After a long trial and error process, finally in order to restore the file permissions, I’ve just do that:
* launch the Disk Utilities.app
* choose my drive on the left panel
* click on the “Repair disk permissions” button
This did the trick for me.
Hoping this can help someone else.
After I set core.autocrlf=true
I was getting "LF will be replaced by CRLF" (note not "CRLF will be replaced by LF") when I was git add
ing (or perhaps it was it on git commit
?) edited files in windows on a repository (that does use LF) that was checked out before I set core.autocrlf=true
.
I made a new checkout with core.autocrlf=true
and now I'm not getting those messages.
How about using good(?) old goto
?
:loop
echo Ooops
goto loop
See also this for a more useful example.
It's HTML character references for encoding a character by its decimal code point
Look at the ASCII table here and you'll see that 39 (hex 0x27, octal 47) is the code for apostrophe
first you have to set an id for your audio element
in your js :
var ply = document.getElementById('player');
var oldSrc = ply.src;
// just to remember the old source
ply.src = "";
// to stop the player you have to replace the source with nothing
How about making the <div id="mainWrapperDivWithBGImage">
as three divs, where the two outside divs hold the rounded corners images, and the middle div simply has a background-color to match the rounded corner images. Then you could simply place the other elements inside the middle div, or:
#outside_left{width:10px; float:left;}
#outside_right{width:10px; float:right;}
#middle{background-color:#color of rnd_crnrs_foo.gif; float:left;}
Then
HTML:
<div id="mainWrapperDivWithBGImage">
<div id="outside_left><img src="rnd_crnrs_left.gif" /></div>
<div id="middle">
<div id="another_div"><img src="foo.gif" /></div>
<div id="outside_right><img src="rnd_crnrs_right.gif" /></div>
</div>
You may have to do position:relative; and such.
new api @ http://www.omdbapi.com
edit: due to legal issues had to move the service to a new domain :)
This is the only thing that works on all current browsers:
<script>
function goBack() {
history.go(-1);
}
</script>
<button onclick="goBack()">Go Back</button>
If you are using GNU time instead of the bash built-in, try
time -o outfile command
(Note: GNU time formats a little differently than the bash built-in).
var cars = [
manufacturer: [
{
color: 'gray',
model: '1',
nOfDoors: 4
},
{
color: 'yellow',
model: '2',
nOfDoors: 4
}
]
]
I added -adaptive-resize 60%
to the suggested command, but with -quality 60%
.
convert -strip -interlace Plane -gaussian-blur 0.05 -quality 60% -adaptive-resize 60% img_original.jpg img_resize.jpg
These were my results
I'm not sure if that conversion destroys my image too much, but I honestly didn't think my conversion looked like crap. It was a wide angle panorama and I didn't care for meticulous obstruction.
I found myself in a similar predicament today while trying to run a command through a Node.js module:
I was using the PowerShell and trying to run:
command -e 'func($a)'
But with the extra symbols, PowerShell was mangling the arguments. To fix, I back-tick escaped double-quote marks:
command -e `"func($a)`"
I've seen the short-circuiting behaviour of the &&
operator used to achieve this, although people who are not accustomed to this may find it hard to read or even call it an anti-pattern:
lemons && document.write("foo gave me a bar");
Personally, I'll often use single-line if
without brackets, like this:
if (lemons) document.write("foo gave me a bar");
If I need to add more statements in, I'll put the statements on the next line and add brackets. Since my IDE does automatic indentation, the maintainability objections to this practice are moot.
((1,2,3,4),
(5,6,7,8),
(9,0,1,2))
Using tuples instead of lists makes it marginally harder to change the data structure in unwanted ways.
If you are going to do extensive use of those, you are best off wrapping a true number array in a class, so you can define methods and properties on them. (Or, you could NumPy, SciPy, ... if you are going to do your processing with those libraries.)
What you are doing is, you are accepting split response in two different variables, and strings.Split() is returning only one response and that is an array of string. you need to store it to single variable and then you can extract the part of string by fetching the index value of an array.
example :
var hostAndPort string
hostAndPort = "127.0.0.1:8080"
sArray := strings.Split(hostAndPort, ":")
fmt.Println("host : " + sArray[0])
fmt.Println("port : " + sArray[1])
public void onClick(View v) {
Context context = v.getContext();
CharSequence text = "Message";
int duration = Toast.LENGTH_SHORT;
Toast toast = Toast.makeText(context, text, duration);
toast.show();
}
try:
git fetch origin master
git merge origin master
After to wrote this code I received other error: (non-fast-forward)
I write this code:
git fetch origin master:tmp
git rebase tmp
git push origin HEAD:master
git branch -D tmp
And resolved my problem
Use the std::getline()
from <string>
.
istream & getline(istream & is,std::string& str)
So, for your case it would be:
std::getline(read,x);
Basically JAVA_HOME
is use to set path of the java . it is use in windows. it's used for set path of the multiple software like as java EE
, ANT
and Maven
.
this is the steps to solve your problem:
only for core java to set path :
path :"C:\Program Files\Java\jre1.8.0_77\bin"
but when you are use multi built like as ANT
, core java then you are used JAVE_HOME
in environment .
follow the steps :
JAVA_HOME
:"C:\Program Files\Java\jre1.8.0_77\bin"
ANT_HOME
:"C:\ant\apache-ant-1.9.6"
Path: JAVA_HOME
, ANT_HOME
;
it is the systematic way to set the environment variable..
Building on @Pvl's answer, you can include type safety on your returned value as well if you use overrides:
function dig<
T,
K1 extends keyof T
>(obj: T, key1: K1): T[K1];
function dig<
T,
K1 extends keyof T,
K2 extends keyof T[K1]
>(obj: T, key1: K1, key2: K2): T[K1][K2];
function dig<
T,
K1 extends keyof T,
K2 extends keyof T[K1],
K3 extends keyof T[K1][K2]
>(obj: T, key1: K1, key2: K2, key3: K3): T[K1][K2][K3];
function dig<
T,
K1 extends keyof T,
K2 extends keyof T[K1],
K3 extends keyof T[K1][K2],
K4 extends keyof T[K1][K2][K3]
>(obj: T, key1: K1, key2: K2, key3: K3, key4: K4): T[K1][K2][K3][K4];
function dig<
T,
K1 extends keyof T,
K2 extends keyof T[K1],
K3 extends keyof T[K1][K2],
K4 extends keyof T[K1][K2][K3],
K5 extends keyof T[K1][K2][K3][K4]
>(obj: T, key1: K1, key2: K2, key3: K3, key4: K4, key5: K5): T[K1][K2][K3][K4][K5];
function dig<
T,
K1 extends keyof T,
K2 extends keyof T[K1],
K3 extends keyof T[K1][K2],
K4 extends keyof T[K1][K2][K3],
K5 extends keyof T[K1][K2][K3][K4]
>(obj: T, key1: K1, key2?: K2, key3?: K3, key4?: K4, key5?: K5):
T[K1] |
T[K1][K2] |
T[K1][K2][K3] |
T[K1][K2][K3][K4] |
T[K1][K2][K3][K4][K5] {
let value: any = obj && obj[key1];
if (key2) {
value = value && value[key2];
}
if (key3) {
value = value && value[key3];
}
if (key4) {
value = value && value[key4];
}
if (key5) {
value = value && value[key5];
}
return value;
}
Example on playground.
A submodule may be marked as dirty if filemode settings is enabled and you changed file permissions in submodule subtree.
To disable filemode in a submodule, you can edit /.git/modules/path/to/your/submodule/config and add
[core]
filemode = false
If you want to ignore all dirty states, you can either set ignore = dirty
property in /.gitmodules file, but I think it's better to only disable filemode.
Try initializing your variables and use them in your connection object:
$username ="root";
$password = "password";
$host = "localhost";
$table = "shop";
$conn = new mysqli("$host", "$username", "$password", "$table");
A bracket - [
or ]
- means that end of the range is inclusive -- it includes the element listed. A parenthesis - (
or )
- means that end is exclusive and doesn't contain the listed element. So for [first1, last1)
, the range starts with first1
(and includes it), but ends just before last1
.
Assuming integers:
Alternate solution
Create a column that will store the month:
data['month'] = data['date'].dt.month
Create a column that will store the year:
data['year'] = data['date'].dt.year
You can use call to overcome the problem of environment variables being evaluated too soon - e.g.
set A=Hello & call echo %A%
The subquery option has already been answered, but note that in many cases a LEFT JOIN
can be a faster way to do this:
SELECT table1.*
FROM table1 LEFT JOIN table2 ON table2.principal=table1.principal
WHERE table2.principal IS NULL
If you want to check multiple tables to make sure it's not present in any of the tables (like in SRKR's comment), you can use this:
SELECT table1.*
FROM table1
LEFT JOIN table2 ON table2.name=table1.name
LEFT JOIN table3 ON table3.name=table1.name
WHERE table2.name IS NULL AND table3.name IS NULL
you may check the following code for status code handler by alamofire
let request = URLRequest(url: URL(string:"url string")!)
Alamofire.request(request).validate(statusCode: 200..<300).responseJSON { (response) in
switch response.result {
case .success(let data as [String:Any]):
completion(true,data)
case .failure(let err):
print(err.localizedDescription)
completion(false,err)
default:
completion(false,nil)
}
}
if status code is not validate it will be enter the failure in switch case
The error is exactly what it says it is; you're trying to take sumall[0]
when sumall
is an int and that doesn't make any sense. What do you believe sumall
should be?
This error is happening because you are just opening html documents directly from the browser. To fix this you will need to serve your code from a webserver and access it on localhost. If you have Apache setup, use it to serve your files. Some IDE's have built in web servers, like JetBrains IDE's, Eclipse...
If you have Node.Js setup then you can use http-server. Just run npm install http-server -g
and you will be able to use it in terminal like http-server C:\location\to\app
.
I was facing same issue and I just started app with new port and everything looks good.
ng serve --port 4201
The results container div has position: relative
meaning it is still in the document flow and will change the layout of elements around it. You need to use position: absolute
to achieve a 'floating' effect.
You should also check the markup you're using, you have phantom <li>
s with no container <ul>
, you could probably replace both the div#suggestions
and div#autoSuggestionsList
with a single <ul>
and get the desired result.
One way to print your code is to push it to an online version control system like Github or Bitbucket. In your browser, navigate to the file and print it.
Doing it this way, you'll get syntax highlighting and version control.
This code works for me: check this link
This is my code when i stop and start service in activity
case R.id.buttonStart:
Log.d(TAG, "onClick: starting srvice");
startService(new Intent(this, MyService.class));
break;
case R.id.buttonStop:
Log.d(TAG, "onClick: stopping srvice");
stopService(new Intent(this, MyService.class));
break;
}
}
}
And in service class:
@Override
public void onCreate() {
Toast.makeText(this, "My Service Created", Toast.LENGTH_LONG).show();
Log.d(TAG, "onCreate");
player = MediaPlayer.create(this, R.raw.braincandy);
player.setLooping(false); // Set looping
}
@Override
public void onDestroy() {
Toast.makeText(this, "My Service Stopped", Toast.LENGTH_LONG).show();
Log.d(TAG, "onDestroy");
player.stop();
}
HAPPY CODING!
You actually want to show a placeholder, HTML 5 offer this feature and it's very sweet !
Try this out :
<input name="Name" placeholder="Enter Your Name">
Function XmlSerializer.FromTypes does not throw the exception, but it leaks the memory. Thats why you need to cache such serializer for every type to avoid memory leaking for every instance created.
Create your own XmlSerializer factory and use it simply:
XmlSerializer serializer = XmlSerializerFactoryNoThrow.Create(typeof(MyType));
The factory looks likes:
public static class XmlSerializerFactoryNoThrow
{
public static Dictionary<Type, XmlSerializer> _cache = new Dictionary<Type, XmlSerializer>();
private static object SyncRootCache = new object();
/// <summary>
/// //the constructor XmlSerializer.FromTypes does not throw exception, but it is said that it causes memory leaks
/// http://stackoverflow.com/questions/1127431/xmlserializer-giving-filenotfoundexception-at-constructor
/// That is why I use dictionary to cache the serializers my self.
/// </summary>
public static XmlSerializer Create(Type type)
{
XmlSerializer serializer;
lock (SyncRootCache)
{
if (_cache.TryGetValue(type, out serializer))
return serializer;
}
lock (type) //multiple variable of type of one type is same instance
{
//constructor XmlSerializer.FromTypes does not throw the first chance exception
serializer = XmlSerializer.FromTypes(new[] { type })[0];
//serializer = XmlSerializerFactoryNoThrow.Create(type);
}
lock (SyncRootCache)
{
_cache[type] = serializer;
}
return serializer;
}
}
More complicated version without possibility of memory leak (please someone review the code):
public static XmlSerializer Create(Type type)
{
XmlSerializer serializer;
lock (SyncRootCache)
{
if (_cache.TryGetValue(type, out serializer))
return serializer;
}
lock (type) //multiple variable of type of one type is same instance
{
lock (SyncRootCache)
{
if (_cache.TryGetValue(type, out serializer))
return serializer;
}
serializer = XmlSerializer.FromTypes(new[] { type })[0];
lock (SyncRootCache)
{
_cache[type] = serializer;
}
}
return serializer;
}
}
Here is my cover fill solution (similar to background-size: cover, but it supports old IE browser)
<div class="imgContainer" style="height:100px; width:500px; overflow:hidden; background-color: black">
<img src="http://dev.isaacsonwebdevelopment.com/sites/development/files/views-slideshow-settings-jquery-cycle-custom-options-message.png" id="imgCat">
</div>
<script src="http://ajax.aspnetcdn.com/ajax/jQuery/jquery-1.11.3.min.js"></script>
<script>
$(window).load(function() {
var heightRate =$("#imgCat").height() / $("#imgCat").parent(".imgContainer").height();
var widthRate = $("#imgCat").width() / $("#imgCat").parent(".imgContainer").width();
if (window.console) {
console.log($("#imgCat").height());
console.log(heightRate);
console.log(widthRate);
console.log(heightRate > widthRate);
}
if (heightRate <= widthRate) {
$("#imgCat").height($("#imgCat").parent(".imgContainer").height());
} else {
$("#imgCat").width($("#imgCat").parent(".imgContainer").width());
}
});
</script>
After going down a bit of a bit of a rabbit hole trying to follow the answers to this question (maybe because I had to do this in a visual studio project), I found the easier path was to
Cut and paste the file(s) I no longer want to track into a temporary location
Commit the "deletion" of those files
Commit a modification of the .gitignore
to exclude the files I had temporarily moved
Move the files back into the folder.
I found this to be the most straight forward way to go about it (at least in a visual studio, or I would assume other IDE heave based environment like Android Studio), without accidentally shooting myself in the foot with a pretty pervasive git rm -rf --cached .
, after which the visual studio project I was working on didn't load.
You can use proxy-initial-not-pooled
See http://httpd.apache.org/docs/2.2/mod/mod_proxy_http.html :
If this variable is set no pooled connection will be reused if the client connection is an initial connection. This avoids the "proxy: error reading status line from remote server" error message caused by the race condition that the backend server closed the pooled connection after the connection check by the proxy and before data sent by the proxy reached the backend. It has to be kept in mind that setting this variable downgrades performance, especially with HTTP/1.0 clients.
We had this problem, too. We fixed it by adding
SetEnv proxy-nokeepalive 1
SetEnv proxy-initial-not-pooled 1
and turning keepAlive
on all servers off.
mod_proxy_http is fine in most scenarios but we are running it with heavy load and we still got some timeout problems we do not understand.
But see if the above directive fits your needs.
You can use rabbitmqctl eval as below:
rabbitmqctl eval 'IfUnused = false, IfEmpty = true, MatchRegex =
<<"^prefix-">>, [rabbit_amqqueue:delete(Q, IfUnused, IfEmpty) || Q <-
rabbit_amqqueue:list(), re:run(element(4, element(2, Q)), MatchRegex)
=/= nomatch ].'
The above will delete all empty queues in all vhosts that have a name beginning with "prefix-". You can edit the variables IfUnused, IfEmpty, and MatchRegex as per your requirement.
Turns out that the post (or rather the whole table) was locked by the very same connection that I tried to update the post with.
I had a opened record set of the post that was created by:
Set RecSet = Conn.Execute()
This type of recordset is supposed to be read-only and when I was using MS Access as database it did not lock anything. But apparently this type of record set did lock something on MS SQL Server 2012 because when I added these lines of code before executing the UPDATE SQL statement...
RecSet.Close
Set RecSet = Nothing
...everything worked just fine.
So bottom line is to be careful with opened record sets - even if they are read-only they could lock your table from updates.
Laravel 5.6.*
$name = 'file.jpg';
store on image or pdf
$file->storeAs('public/', $name );
download image or pdf
return response()->download($name);
view image or pdf
return response()->file($name);
You can also do this with awk, using -v
to provide the pattern:
awk -v patt="pattern" '$0 ~ patt {gsub(patt, "\n"patt)}1' file
This checks if a line contains a given pattern. If so, it appends a new line to the beginning of it.
See a basic example:
$ cat file
hello
this is some pattern and we are going ahead
bye!
$ awk -v patt="pattern" '$0 ~ patt {gsub(patt, "\n"patt)}1' file
hello
this is some
pattern and we are going ahead
bye!
Note it will affect to all patterns in a line:
$ cat file
this pattern is some pattern and we are going ahead
$ awk -v patt="pattern" '$0 ~ patt {gsub(patt, "\n"patt)}1' d
this
pattern is some
pattern and we are going ahead
Simlpy close and re-open the PR if you do not have the write access.
jquery.ajax({
url: `//your api url`
type: "GET",
dataType: "json",
success: function(data) {
jQuery.each(data, function(index, value) {
console.log(data);
`All you API data is here`
}
}
});
I think this is the best solution for this type error. So please add below line. Also it work my code when I am using MSVS 2015.
<configuration>
<appSettings>
<add key="ValidationSettings:UnobtrusiveValidationMode" value="None" />
</appSettings>
</configuration>
DDL is Data Definition Language : Specification notation for defining the database schema. It works on Schema level.
DDL commands are:
create,drop,alter,rename
For example:
create table account (
account_number char(10),
balance integer);
DML is Data Manipulation Language .It is used for accessing and manipulating the data.
DML commands are:
select,insert,delete,update,call
For example :
update account set balance = 1000 where account_number = 01;
Here is your answer:
if "insert_char_or_string_here" in "insert_string_to_search_here":
#DOSTUFF
For checking if it is false:
if not "insert_char_or_string_here" in "insert_string_to_search_here":
#DOSTUFF
OR:
if "insert_char_or_string_here" not in "insert_string_to_search_here":
#DOSTUFF
You could try this:
- Open the Terminal application. It can be found in the Utilities directory inside the Applications directory.
- Type the following: echo 'export PATH=YOURPATHHERE:$PATH' >> ~/.profile, replacing "YOURPATHHERE" with the name of the directory you want to add. Make certain that you use ">>" instead of one ">".
- Hit Enter.
- Close the Terminal and reopen. Your new Terminal session should now use the new PATH.
Thank you Rob W for your answer.
I have been using this within a Cordova application to avoid having to load the API and so that I can easily control iframes which are loaded dynamically.
I always wanted the ability to be able to extract information from the iframe, such as the state (getPlayerState) and the time (getCurrentTime).
Rob W helped highlight how the API works using postMessage, but of course this only sends information in one direction, from our web page into the iframe. Accessing the getters requires us to listen for messages posted back to us from the iframe.
It took me some time to figure out how to tweak Rob W's answer to activate and listen to the messages returned by the iframe. I basically searched through the source code within the YouTube iframe until I found the code responsible for sending and receiving messages.
The key was changing the 'event' to 'listening', this basically gave access to all the methods which were designed to return values.
Below is my solution, please note that I have switched to 'listening' only when getters are requested, you can tweak the condition to include extra methods.
Note further that you can view all messages sent from the iframe by adding a console.log(e) to the window.onmessage. You will notice that once listening is activated you will receive constant updates which include the current time of the video. Calling getters such as getPlayerState will activate these constant updates but will only send a message involving the video state when the state has changed.
function callPlayer(iframe, func, args) {
iframe=document.getElementById(iframe);
var event = "command";
if(func.indexOf('get')>-1){
event = "listening";
}
if ( iframe&&iframe.src.indexOf('youtube.com/embed') !== -1) {
iframe.contentWindow.postMessage( JSON.stringify({
'event': event,
'func': func,
'args': args || []
}), '*');
}
}
window.onmessage = function(e){
var data = JSON.parse(e.data);
data = data.info;
if(data.currentTime){
console.log("The current time is "+data.currentTime);
}
if(data.playerState){
console.log("The player state is "+data.playerState);
}
}
May the div with id="content" not be created when this event is attached? You can try live() jquery method.
Else there may be multiple divs with the same id or you just spelled it wrong, it happens...
You can use Random.Next(int maxValue)
:
Return: A 32-bit signed integer greater than or equal to zero, and less than maxValue; that is, the range of return values ordinarily includes zero but not maxValue. However, if maxValue equals zero, maxValue is returned.
var r = new Random();
// print random integer >= 0 and < 100
Console.WriteLine(r.Next(100));
For this case however you could use Random.Next(int minValue, int maxValue)
, like this:
// print random integer >= 1 and < 101
Console.WriteLine(r.Next(1, 101);)
// or perhaps (if you have this specific case)
Console.WriteLine(r.Next(100) + 1);
Better approach may be a polyfill like this
jQuery.fn.load = function(callback){ $(window).on("load", callback) };
With this you can leave the legacy code untouched. If you use webpack be sure to use script-loader.
The -Wno-unused-variable
switch usually does the trick. However, that is a very useful warning indeed if you care about these things in your project. It becomes annoying when GCC starts to warn you about things not in your code though.
I would recommend you keeping the warning on, but use -isystem
instead of -I
for include directories of third-party projects. That flag tells GCC not to warn you about the stuff you have no control over.
For example, instead of -IC:\\boost_1_52_0
, say -isystem C:\\boost_1_52_0
.
Hope it helps. Good Luck!
I've implemented it like this:
Public Function LastRowWithData(ByVal strCol As String, ByVal intRow As Integer) As Long
Range(strCol & intRow).Select
LastRowWithData= ActiveSheet.Cells(ActiveSheet.Rows.Count, strCol).End(xlUp).Row
End Function
There are new format specifications, String Format Specification Mini-Language:
You can do the same as:
"{:.2f}".format(13.949999999999999)
Note 1: the above returns a string. In order to get as float, simply wrap with float(...)
:
float("{:.2f}".format(13.949999999999999))
Note 2: wrapping with float()
doesn't change anything:
>>> x = 13.949999999999999999
>>> x
13.95
>>> g = float("{:.2f}".format(x))
>>> g
13.95
>>> x == g
True
>>> h = round(x, 2)
>>> h
13.95
>>> x == h
True
In windows You may try this batch file to help you to shuffle your data.txt, The usage of the batch code is
C:\> type list.txt | shuffle.bat > maclist_temp.txt
After issuing this command, maclist_temp.txt will contain a randomized list of lines.
Hope this helps.
I used this code to show the dialog at the bottom of the screen:
Dialog dlg = <code to create custom dialog>;
Window window = dlg.getWindow();
WindowManager.LayoutParams wlp = window.getAttributes();
wlp.gravity = Gravity.BOTTOM;
wlp.flags &= ~WindowManager.LayoutParams.FLAG_DIM_BEHIND;
window.setAttributes(wlp);
This code also prevents android from dimming the background of the dialog, if you need it. You should be able to change the gravity parameter to move the dialog about
private void showPictureialog() {
final Dialog dialog = new Dialog(this,
android.R.style.Theme_Translucent_NoTitleBar);
// Setting dialogview
Window window = dialog.getWindow();
window.setGravity(Gravity.CENTER);
window.setLayout(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT);
dialog.setTitle(null);
dialog.setContentView(R.layout.selectpic_dialog);
dialog.setCancelable(true);
dialog.show();
}
you can customize you dialog based on gravity and layout parameters change gravity and layout parameter on the basis of your requirenment
One (slightly hacky) way to do it is replace and links that lead away from your site with an AJAX call to the server-side, indicating the user is leaving, then use that same javascript block to take the user to the external site they've requested.
Of course this won't work if the user simply closes the browser window or types in a new URL.
To get around that, you'd potentially need to use Javascript's setTimeout() on the page, making an AJAX call every few seconds (depending on how quickly you want to know if the user has left).
The following worked for me:
The interface consist of you logic methods plus additional identity method:
public interface MyService {
String getType();
void checkStatus();
}
Some implementations:
@Component
public class MyServiceOne implements MyService {
@Override
public String getType() {
return "one";
}
@Override
public void checkStatus() {
// Your code
}
}
@Component
public class MyServiceTwo implements MyService {
@Override
public String getType() {
return "two";
}
@Override
public void checkStatus() {
// Your code
}
}
@Component
public class MyServiceThree implements MyService {
@Override
public String getType() {
return "three";
}
@Override
public void checkStatus() {
// Your code
}
}
And the factory itself as following:
@Service
public class MyServiceFactory {
@Autowired
private List<MyService> services;
private static final Map<String, MyService> myServiceCache = new HashMap<>();
@PostConstruct
public void initMyServiceCache() {
for(MyService service : services) {
myServiceCache.put(service.getType(), service);
}
}
public static MyService getService(String type) {
MyService service = myServiceCache.get(type);
if(service == null) throw new RuntimeException("Unknown service type: " + type);
return service;
}
}
I've found such implementation easier, cleaner and much more extensible. Adding new MyService is as easy as creating another spring bean implementing same interface without making any changes in other places.
I always just use echo "<script> function(); </script>";
or something similar. you're not technically calling the function in PHP, but this as close as your going to get.
On a 64-bit Windows system, the reading of the various environment variables and some Windows Registry keys is redirected to different sources, depending whether the process doing the reading is 32-bit or 64-bit.
The table below lists these data sources:
X = HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion
Y = HKLM\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion
Z = HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProfileList
READING ENVIRONMENT VARIABLES: Source for 64-bit process Source for 32-bit process
-------------------------------|----------------------------------------|--------------------------------------------------------------
%ProgramFiles% : X\ProgramW6432Dir X\ProgramFilesDir (x86)
%ProgramFiles(x86)% : X\ProgramFilesDir (x86) X\ProgramFilesDir (x86)
%ProgramW6432% : X\ProgramW6432Dir X\ProgramW6432Dir
%CommonProgramFiles% : X\CommonW6432Dir X\CommonFilesDir (x86)
%CommonProgramFiles(x86)% : X\CommonFilesDir (x86) X\CommonFilesDir (x86)
%CommonProgramW6432% : X\CommonW6432Dir X\CommonW6432Dir
%ProgramData% : Z\ProgramData Z\ProgramData
READING REGISTRY VALUES: Source for 64-bit process Source for 32-bit process
-------------------------------|----------------------------------------|--------------------------------------------------------------
X\ProgramFilesDir : X\ProgramFilesDir Y\ProgramFilesDir
X\ProgramFilesDir (x86) : X\ProgramFilesDir (x86) Y\ProgramFilesDir (x86)
X\ProgramFilesPath : X\ProgramFilesPath = %ProgramFiles% Y\ProgramFilesPath = %ProgramFiles(x86)%
X\ProgramW6432Dir : X\ProgramW6432Dir Y\ProgramW6432Dir
X\CommonFilesDir : X\CommonFilesDir Y\CommonFilesDir
X\CommonFilesDir (x86) : X\CommonFilesDir (x86) Y\CommonFilesDir (x86)
X\CommonW6432Dir : X\CommonW6432Dir Y\CommonW6432Dir
So for example, for a 32-bit process, the source of the data for the %ProgramFiles%
and %ProgramFiles(x86)%
environment variables is the Registry value HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\ProgramFilesDir (x86)
.
However, for a 64-bit process, the source of the data for the %ProgramFiles%
environment variable is the Registry value HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\ProgramW6432Dir
...and the source of the data for the %ProgramFiles(x86)%
environment variable is the Registry value HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\ProgramFilesDir (x86)
Most default Windows installation put a string like C:\Program Files (x86)
into the Registry value HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\ProgramFilesDir (x86)
but this (and others) can be changed.
Whatever is entered into these Windows Registry values will be read by Windows Explorer into respective Environment Variables upon login and then copied to any child process that it subsequently spawns.
The registry value HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\ProgramFilesPath
is especially noteworthy because most Windows installations put the string %ProgramFiles%
into it, to be read by 64-bit processes. This string refers to the environment variable %ProgramFiles%
which in turn, takes its data from the Registry value HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\ProgramW6432Dir
...unless some program changes the value of this environment variable apriori.
I have written a small utility, which displays these environment variables for 64-bit and 32-bit processes. You can download it here.
The source code for VisualStudio 2017 is included and the compiled 64-bit and 32-bit binary executables are in the directories ..\x64\Release
and ..\x86\Release
, respectively.
Oh so i guess .pretty() is equal to:
db.collection.find().forEach(printjson);
var ref = Request.ServerVariables("HTTP_REFERER");
Type within the quotes any other server variable name you want.
to RelativeLayout, try this code , it works for me:
yourLayoutParams.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);
I use both depending on who in my department I am helping (Some people prefer 2.7, others 3.5). Anyway, I use Anaconda and my default installation is 3.5. I use environments for other versions of python, packages, etc.. So for example, when I wanted to start using python 2.7 I ran:
conda create -n Python27 python=2.7
This creates a new environment named Python27 and installs Python version 2.7. You can add arguments to that line for installing other packages by default or just start from scratch. The environment will automatically activate, to deactivate simply type deactivate
(windows) or source deactivate
(linux, osx) in the command line. To activate in the future type activate Python27
(windows) or source activate Python27
(linux, osx). I would recommend reading the documentation for Managing Environments in Anaconda, if you choose to take that route.
Update
As of conda
version 4.6 you can now use conda activate
and conda deactivate
. The use of source
is now deprecated and will eventually be removed.
import string
sentence = "I am having a very nice 23!@$ day. "
# Remove all punctuations
sentence = sentence.translate(str.maketrans('', '', string.punctuation))
# Remove all numbers"
sentence = ''.join([word for word in sentence if not word.isdigit()])
count = 0;
for index in range(len(sentence)-1) :
if sentence[index+1].isspace() and not sentence[index].isspace():
count += 1
print(count)
JD-GUI is really good. You could just open a JAR file and browse through the code as if you are working on an IDE. Good stuff.
Framework 4: no need to use StreamWriter:
System.IO.File.WriteAllLines("SavedLists.txt", Lists.verbList);
function FormatPhone(tt,e){
//console.log(e.which);
var t = $(tt);
var v1 = t.val();
var k = e.which;
if(k!=8 && v1.length===18){
e.preventDefault();
}
var q = String.fromCharCode((96 <= k && k <= 105)? k-48 : k);
if (((e.shiftKey || (e.keyCode < 48 || e.keyCode > 57)) && (e.keyCode < 96 || e.keyCode > 105)) && e.keyCode!=46 && e.keyCode!=37 && e.keyCode!=8 && e.keyCode!=39) {
e.preventDefault();
}
else{
setTimeout(function(){
var v = t.val();
var l = v.length;
//console.log(l);
if(k!=8){
if(l<4){
t.val('+7 ');
}
else if(l===4){
if(isNaN(q)){
t.val('+7 (');
}
else{
t.val('+7 ('+q);
}
}
else if(l===7){
t.val(v+')');
}
else if(l===9){
t.val(v1+' '+q);
}
else if(l===13||l===16){
t.val(v1+'-'+q);
}
else if(l>18){
v=v.substr(0,18);
t.val(v);
}
}
else{
if(l<4){
t.val('+7 ');
}
}
},100);
}
}
You need to add logic to assign random values to double[] array using randomFill method.
Change
public static double[] list(){
anArray = new double[10];
return anArray;
}
To
public static double[] list() {
anArray = new double[10];
for(int i=0;i<anArray.length;i++)
{
anArray[i] = randomFill();
}
return anArray;
}
Then you can call methods, including list() and print() in main method to generate random double values and print the double[] array in console.
public static void main(String args[]) {
list();
print();
}
One result is as follows:
-2.89783865E8
1.605018025E9
-1.55668528E9
-1.589135498E9
-6.33159518E8
-1.038278095E9
-4.2632203E8
1.310182951E9
1.350639892E9
6.7543543E7
Ditto Casper's answer:
puts Dir.pwd
As soon as you know current working directory, specify the file path relatively to that directory.
For example, if your working directory is project root, you can open a file under it directly like this
json_file = File.read(myfile.json)
How I did it with a pivot in dynamic sql (#AccPurch was created prior to this)
DECLARE @sql AS nvarchar(MAX)
declare @Month Nvarchar(1000)
--DROP TABLE #temp
select distinct YYYYMM into #temp from #AccPurch AS ap
SELECT @Month = COALESCE(@Month, '') + '[' + CAST(YYYYMM AS VarChar(8)) + '],' FROM #temp
SELECT @Month= LEFT(@Month,len(@Month)-1)
SET @sql = N'SELECT UserID, '+ @Month + N' into ##final_Donovan_12345 FROM (
Select ap.AccPurch ,
ap.YYYYMM ,
ap.UserID ,
ap.AccountNumber
FROM #AccPurch AS ap
) p
Pivot (SUM(AccPurch) FOR YYYYMM IN ('+@Month+ N')) as pvt'
EXEC sp_executesql @sql
Select * INTO #final From ##final_Donovan_12345
DROP TABLE ##final_Donovan_12345
Select * From #final AS f
The reason is that the data doesn't match the datatype. I have come across the same issues that I forgot to make the fields match. Though my case is not same as yours, but it shows the similar error message.
The situation is that I copy a table, but accidently I misspell one field, so I change it using the ALTER
after creating the database. And the order of fields in both table is not identical. so when I use the INSERT INTO TableName SELECT * FROM TableName
, the result showed the similar errors: Operand type clash: datetime is incompatible with uniqueidentifier
This is a simiple example:
use example
go
create table Test1 (
id int primary key,
item uniqueidentifier,
inserted_at datetime
)
go
create table Test2 (
id int primary key,
inserted_at datetime
)
go
alter table Test2 add item uniqueidentifier;
go
--insert into Test1 (id, item, inserted_at) values (1, newid(), getdate()), (2, newid(), getdate());
insert into Test2 select * from Test1;
select * from Test1;
select * from Test2;
The error message is:
Msg 206, Level 16, State 2, Line 24
Operand type clash: uniqueidentifier is incompatible with datetime
Something like this
SELECT *
FROM MyParts
LEFT JOIN
(
SELECT MAX(PriceDate), PartID FROM MyPrice group by PartID
) myprice
ON MyParts.Partid = MyPrice.Partid
If you know your partid or can restrict it put it inside the join.
SELECT myprice.partid, myprice.partdate, myprice2.Price, *
FROM MyParts
LEFT JOIN
(
SELECT MAX(PriceDate), PartID FROM MyPrice group by PartID
) myprice
ON MyParts.Partid = MyPrice.Partid
Inner Join MyPrice myprice2
on myprice2.pricedate = myprice.pricedate
and myprice2.partid = myprice.partid
EDIT 2015 May
Disclaimer: I've taken the snippet from the answer linked below:
In addition to WebKit, as of Firefox 35 we'll be able to use the appearance
property:
Using
-moz-appearance
with thenone
value on a combobox now remove the dropdown button
So now in order to hide the default styling, it's as easy as adding the following rules on our select element:
select {
-webkit-appearance: none;
-moz-appearance: none;
appearance: none;
}
For IE 11 support, you can use [::-ms-expand
][15].
select::-ms-expand { /* for IE 11 */
display: none;
}
Old Answer
Unfortunately what you ask is not possible by using pure CSS. However, here is something similar that you can choose as a work around. Check the live code below.
div { _x000D_
margin: 10px;_x000D_
padding: 10px; _x000D_
border: 2px solid purple; _x000D_
width: 200px;_x000D_
-webkit-border-radius: 5px;_x000D_
-moz-border-radius: 5px;_x000D_
border-radius: 5px;_x000D_
}_x000D_
div > ul { display: none; }_x000D_
div:hover > ul {display: block; background: #f9f9f9; border-top: 1px solid purple;}_x000D_
div:hover > ul > li { padding: 5px; border-bottom: 1px solid #4f4f4f;}_x000D_
div:hover > ul > li:hover { background: white;}_x000D_
div:hover > ul > li:hover > a { color: red; }
_x000D_
<div>_x000D_
Select_x000D_
<ul>_x000D_
<li><a href="#">Item 1</a></li>_x000D_
<li><a href="#">Item 2</a></li>_x000D_
<li><a href="#">Item 3</a></li>_x000D_
</ul>_x000D_
</div>
_x000D_
EDIT
Here is the question that you asked some time ago. How to style a <select> dropdown with CSS only without JavaScript? As it tells there, only in Chrome and to some extent in Firefox you can achieve what you want. Otherwise, unfortunately, there is no cross browser pure CSS solution for styling a select.
I found your question while searching for information with SQLite and Java. Just thought I'd add my answer which I also posted on my blog.
I have been coding in Java for a while now. I have also known about SQLite but never used it… Well I have used it through other applications but never in an app that I coded. So I needed it for a project this week and it's so simple use!
I found a Java JDBC driver for SQLite. Just add the JAR file to your classpath and import java.sql.*
His test app will create a database file, send some SQL commands to create a table, store some data in the table, and read it back and display on console. It will create the test.db file in the root directory of the project. You can run this example with java -cp .:sqlitejdbc-v056.jar Test
.
package com.rungeek.sqlite;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.Statement;
public class Test {
public static void main(String[] args) throws Exception {
Class.forName("org.sqlite.JDBC");
Connection conn = DriverManager.getConnection("jdbc:sqlite:test.db");
Statement stat = conn.createStatement();
stat.executeUpdate("drop table if exists people;");
stat.executeUpdate("create table people (name, occupation);");
PreparedStatement prep = conn.prepareStatement(
"insert into people values (?, ?);");
prep.setString(1, "Gandhi");
prep.setString(2, "politics");
prep.addBatch();
prep.setString(1, "Turing");
prep.setString(2, "computers");
prep.addBatch();
prep.setString(1, "Wittgenstein");
prep.setString(2, "smartypants");
prep.addBatch();
conn.setAutoCommit(false);
prep.executeBatch();
conn.setAutoCommit(true);
ResultSet rs = stat.executeQuery("select * from people;");
while (rs.next()) {
System.out.println("name = " + rs.getString("name"));
System.out.println("job = " + rs.getString("occupation"));
}
rs.close();
conn.close();
}
}
.+,(.+)
Explanation:
.+,
will search for everything before the comma, including the comma.
(.+)
will search for everything after the comma, and depending on your regex environment,
\1
is the reference for the first parentheses captured group that you need, in this example, everything after the comma.
Please try the following:
<script>
$(document).ready(function() {
$('.carousel').carousel('pause');
});
</script>
set global sql_mode = 'STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION';
If anyone is getting a behavior where you notice the scroll bar on the right scrolls but the content doesn't move, this fact probably worth considering:
You can also use constraints between the scroll view’s content and objects outside the scroll view to provide a fixed position for the scroll view’s content, making that content appear to float over the scroll view.
That's from Apple's documentation. For example , if you accidentally pinned your top Label/Button/Img/View to the view outside the scroll area (Maybe a header or something just above the scrollView?) instead of the contentView, you'd freeze your whole contentView in place.
NOTE: When using fgets(), the last character in the array will be '\n' at times when you use fgets() for small inputs in CLI (command line interpreter) , as you end the string with 'Enter'. So when you print the string the compiler will always go to the next line when printing the string. If you want the input string to have null terminated string like behavior, use this simple hack.
#include<stdio.h>
int main()
{
int i,size;
char a[100];
fgets(a,100,stdin);;
size = strlen(a);
a[size-1]='\0';
return 0;
}
Update: Updated with help from other users.
Named exports:
Let's say you create a file called utils.js
, with utility functions that you want to make available for other modules (e.g. a React component). Then you would make each function a named export:
export function add(x, y) {
return x + y
}
export function mutiply(x, y) {
return x * y
}
Assuming that utils.js is located in the same directory as your React component, you can use its exports like this:
import { add, multiply } from './utils.js';
...
add(2, 3) // Can be called wherever in your component, and would return 5.
Or if you prefer, place the entire module's contents under a common namespace:
import * as utils from './utils.js';
...
utils.multiply(2,3)
Default exports:
If you on the other hand have a module that only does one thing (could be a React class, a normal function, a constant, or anything else) and want to make that thing available to others, you can use a default export. Let's say we have a file log.js
, with only one function that logs out whatever argument it's called with:
export default function log(message) {
console.log(message);
}
This can now be used like this:
import log from './log.js';
...
log('test') // Would print 'test' in the console.
You don't have to call it log
when you import it, you could actually call it whatever you want:
import logToConsole from './log.js';
...
logToConsole('test') // Would also print 'test' in the console.
Combined:
A module can have both a default export (max 1), and named exports (imported either one by one, or using *
with an alias). React actually has this, consider:
import React, { Component, PropTypes } from 'react';
timedelta
accepts minus(-) time values. so it could be simple as below
import datetime
enter = datetime.time(hour=1, minute=30)
exit = datetime.time(hour=2, minute=0)
duration = datetime.timedelta(hours=exit.hour-enter.hour, minutes=exit.minute-enter.minute)
# duration = datetime.timedelta(hours=1, minutes=-30)
result
>>> duration
datetime.timedelta(seconds=1800)
This problem is due to the https protocol, which is why the other solution works (by switching to the non-secure protocol).
For me, the best solution was to compile the latest version of node, which includes npm
apt-get purge nodejs npm
git clone https://github.com/nodejs/node ~/local/node
cd ~/local/node
./configure
make
make install
Use:
date.format("MM/DD/YYYY") or date.format("MM-DD-YYYY")}
Other Supported formats for reference:
M 1 2 ... 11 12
Mo 1st 2nd ... 11th 12th
MM 01 02 ... 11 12
MMM Jan Feb ... Nov Dec
MMMM January February ... November December
d 0 1 ... 5 6
do 0th 1st ... 5th 6th
dd Su Mo ... Fr Sa
ddd Sun Mon ... Fri Sat
dddd Sunday Monday ... Friday Saturday
YY 70 71 ... 29 30
YYYY 1970 1971 ... 2029 2030
Y 1970 1971 ... 9999 +10000 +10001
Not to steal your answer and adapt it for points or anything, but here is another factorization:
select d.name,
sum(m0.size*8.0/1024) data_file_size_mb,
sum(m1.size*8.0/1024) log_file_size_mb
from sys.databases d
inner join sys.master_files m0 on m0.database_id = d.database_id
inner join sys.master_files m1 on m1.database_id = d.database_id
where m0.type = 0 and m1.type = 1
group by d.name, d.database_id
order by d.database_id
Here is an example of an AWK I used a while ago. It is an AWK that prints new AWKS. AWK and SED being similar it may be a good template.
ls | awk '{ print "awk " "'"'"'" " {print $1,$2,$3} " "'"'"'" " " $1 ".old_ext > " $1 ".new_ext" }' > for_the_birds
It looks excessive, but somehow that combination of quotes works to keep the ' printed as literals. Then if I remember correctly the vaiables are just surrounded with quotes like this: "$1". Try it, let me know how it works with SED.
You must use newCachedThreadPool only when you have short-lived asynchronous tasks as stated in Javadoc, if you submit tasks which takes longer time to process, you will end up creating too many threads. You may hit 100% CPU if you submit long running tasks at faster rate to newCachedThreadPool (http://rashcoder.com/be-careful-while-using-executors-newcachedthreadpool/).
Just another example to add BigDecimals
. Key point is that they are immutable and they can be initialized only in the constructor. Here is the code:
import java.util.*;
import java.math.*;
public class Main {
public static void main(String[] args) {
Scanner sc;
boolean first_right_number = false;
BigDecimal initBigDecimal = BigDecimal.ZERO;
BigDecimal add1 = BigDecimal.ZERO;
BigDecimal add2 = BigDecimal.ZERO;
while (!first_right_number)
{
System.out.print("Enter a first single numeric value: ");
sc = new Scanner(System.in);
if (sc.hasNextBigDecimal())
{
first_right_number = true;
add1 = sc.nextBigDecimal();
}
}
boolean second_right_number = false;
while (!second_right_number)
{
System.out.print("Enter a second single numeric value: ");
sc = new Scanner(System.in);
if (sc.hasNextBigDecimal())
{
second_right_number = true;
add2 = sc.nextBigDecimal();
}
}
BigDecimal result = initBigDecimal.add(add1).add(add2);
System.out.println("Sum of the 2 numbers is: " + result.toString());
}
}
I see one problem with std::make_shared, it doesn't support private/protected constructors
You can actually derive the MediaId from the last segment of the link algorithmically using a method I wrote about here: http://carrot.is/coding/instagram-ids. It works by mapping the URL segment by character codes & converting the id into a base 64 number.
For example, given the link you mentioned (http://instagram.com/p/Y7GF-5vftL), we get the last segment (Y7GF-5vftL
) then we map it into character codes using the base64 url-safe alphabet (24:59:6:5:62:57:47:31:45:11_64
). Next, we convert this base64 number into base10 (448979387270691659
).
If you append your userId after an _
you get the full id in the form you specified, but since the MediaId is unique without the userId you can actually omit the userId from most requests.
Finally, I made a Node.js module called instagram-id-to-url-segment to automate this conversion:
convert = require('instagram-id-to-url-segment');
instagramIdToUrlSegment = convert.instagramIdToUrlSegment;
urlSegmentToInstagramId = convert.urlSegmentToInstagramId;
instagramIdToUrlSegment('448979387270691659'); // Y7GF-5vftL
urlSegmentToInstagramId('Y7GF-5vftL'); // 448979387270691659
Alternate solution can be:
baseKey hKeyLocalMachine = baseKey.HKEY_LOCAL_MACHINE;
uint value = (uint)hKeyLocalMachine;
Or just:
uint value = (uint)baseKey.HKEY_LOCAL_MACHINE;
What you are looking for can be found here. It may exist a more elegant way to accomplish that, but one possible approach is
final Duration timeout = Duration.ofSeconds(30);
ExecutorService executor = Executors.newSingleThreadExecutor();
final Future<String> handler = executor.submit(new Callable() {
@Override
public String call() throws Exception {
return requestDataFromModem();
}
});
try {
handler.get(timeout.toMillis(), TimeUnit.MILLISECONDS);
} catch (TimeoutException e) {
handler.cancel(true);
}
executor.shutdownNow();
final Duration timeout = Duration.ofSeconds(30);
ScheduledExecutorService executor = Executors.newScheduledThreadPool(1);
final Future<String> handler = executor.submit(new Callable() {
@Override
public String call() throws Exception {
return requestDataFromModem();
}
});
executor.schedule(new Runnable() {
@Override
public void run(){
handler.cancel(true);
}
}, timeout.toMillis(), TimeUnit.MILLISECONDS);
executor.shutdownNow();
Those are only a draft so that you can get the main idea.
if your function does not want to return anything you should declare it to "return void" and then you can call it like this "perform functionName(parameter...);"
I realise this is an old topic, but can't you simply:
(Nullable<int>)int.Parse(stringVal);
?
If you're using Bash, you don't even have to use grep
:
files="*.jpg"
regex="[0-9]+_([a-z]+)_[0-9a-z]*"
for f in $files # unquoted in order to allow the glob to expand
do
if [[ $f =~ $regex ]]
then
name="${BASH_REMATCH[1]}"
echo "${name}.jpg" # concatenate strings
name="${name}.jpg" # same thing stored in a variable
else
echo "$f doesn't match" >&2 # this could get noisy if there are a lot of non-matching files
fi
done
It's better to put the regex in a variable. Some patterns won't work if included literally.
This uses =~
which is Bash's regex match operator. The results of the match are saved to an array called $BASH_REMATCH
. The first capture group is stored in index 1, the second (if any) in index 2, etc. Index zero is the full match.
You should be aware that without anchors, this regex (and the one using grep
) will match any of the following examples and more, which may not be what you're looking for:
123_abc_d4e5
xyz123_abc_d4e5
123_abc_d4e5.xyz
xyz123_abc_d4e5.xyz
To eliminate the second and fourth examples, make your regex like this:
^[0-9]+_([a-z]+)_[0-9a-z]*
which says the string must start with one or more digits. The carat represents the beginning of the string. If you add a dollar sign at the end of the regex, like this:
^[0-9]+_([a-z]+)_[0-9a-z]*$
then the third example will also be eliminated since the dot is not among the characters in the regex and the dollar sign represents the end of the string. Note that the fourth example fails this match as well.
If you have GNU grep
(around 2.5 or later, I think, when the \K
operator was added):
name=$(echo "$f" | grep -Po '(?i)[0-9]+_\K[a-z]+(?=_[0-9a-z]*)').jpg
The \K
operator (variable-length look-behind) causes the preceding pattern to match, but doesn't include the match in the result. The fixed-length equivalent is (?<=)
- the pattern would be included before the closing parenthesis. You must use \K
if quantifiers may match strings of different lengths (e.g. +
, *
, {2,4}
).
The (?=)
operator matches fixed or variable-length patterns and is called "look-ahead". It also does not include the matched string in the result.
In order to make the match case-insensitive, the (?i)
operator is used. It affects the patterns that follow it so its position is significant.
The regex might need to be adjusted depending on whether there are other characters in the filename. You'll note that in this case, I show an example of concatenating a string at the same time that the substring is captured.
You need to specify all of the names, including those already registered.
I used the following command originally to register some certificates:
/opt/certbot/certbot-auto certonly --webroot --agree-tos -w /srv/www/letsencrypt/ \
--email [email protected] \
--expand -d example.com,www.example.com
... and just now I successfully used the following command to expand my registration to include a new subdomain as a SAN:
/opt/certbot/certbot-auto certonly --webroot --agree-tos -w /srv/www/letsencrypt/ \
--expand -d example.com,www.example.com,click.example.com
From the documentation:
--expand "If an existing cert covers some subset of the requested names, always expand and replace it with the additional names."
Don't forget to restart the server to load the new certificates if you are running nginx.
One major difference between Sequelize and Persistence.js is that the former supports a STRING
datatype, i.e. VARCHAR(255)
. I felt really uncomfortable making everything TEXT
.
Be sure you are setting PATH to Program Files (x86) not Program Files. That solved my problem.
Some options:
You can use the Execute Package Utility to change your datasource, before running the package.
You can run your package using DTEXEC, and change your connection by passing in a /CONNECTION parameter. Probably save it as a batch so next time you don't need to type the whole thing and just change the datasource as required.
You can use the SSIS XML package configuration file. Here is a walk through.
You can save your configrations in a database table.
Extending Muein's thoughts for those who prefer to edit files directly over running commands in git-bash or terminal.
Go to the .git directory of your project (project root on your local machine) and open the 'config' file. Then look for [remote "origin"] and set the url config as follows:
[remote "origin"]
#the address part will be different depending upon the service you're using github, bitbucket, unfuddle etc.
url = [email protected]:<username>/<projectname>.git
I know that JPA entities must have primary key but I can't change database structure due to reasons beyond my control.
More precisely, a JPA entity must have some Id
defined. But a JPA Id
does not necessarily have to be mapped on the table primary key (and JPA can somehow deal with a table without a primary key or unique constraint).
Is it possible to create JPA (Hibernate) entities that will be work with database structure like this?
If you have a column or a set of columns in the table that makes a unique value, you can use this unique set of columns as your Id
in JPA.
If your table has no unique columns at all, you can use all of the columns as the Id
.
And if your table has some id but your entity doesn't, make it an Embeddable
.
The exact question is how to do it with pure JavaScript not with jQuery.
But I always use the solution that can be found in jQuery's source code. It's just one line of native JavaScript.
For me it's the best, easy readable and even afaik the shortest way to get the iframes content.
First get your iframe
var iframe = document.getElementById('id_description_iframe');
// or
var iframe = document.querySelector('#id_description_iframe');
And then use jQuery's solution
var iframeDocument = iframe.contentDocument || iframe.contentWindow.document;
It works even in the Internet Explorer which does this trick during the
contentWindow
property of theiframe
object. Most other browsers uses thecontentDocument
property and that is the reason why we proof this property first in this OR condition. If it is not set trycontentWindow.document
.
Select elements in iframe
Then you can usually use getElementById()
or even querySelectorAll()
to select the DOM-Element from the iframeDocument
:
if (!iframeDocument) {
throw "iframe couldn't be found in DOM.";
}
var iframeContent = iframeDocument.getElementById('frameBody');
// or
var iframeContent = iframeDocument.querySelectorAll('#frameBody');
Call functions in the iframe
Get just the window
element from iframe
to call some global functions, variables or whole libraries (e.g. jQuery
):
var iframeWindow = iframe.contentWindow;
// you can even call jQuery or other frameworks
// if it is loaded inside the iframe
iframeContent = iframeWindow.jQuery('#frameBody');
// or
iframeContent = iframeWindow.$('#frameBody');
// or even use any other global variable
iframeWindow.myVar = window.myVar;
// or call a global function
var myVar = iframeWindow.myFunction(param1 /*, ... */);
Note
All this is possible if you observe the same-origin policy.
In line 2, there's a std::string
involved (name
). There are operations defined for char[] + std::string
, std::string + char[]
, etc. "Hello " + name
gives a std::string
, which is added to " you are "
, giving another string, etc.
In line 3, you're saying
char[] + char[] + char[]
and you can't just add arrays to each other.
You can get access to the environment variables in either the command line or in the registry.
Command Line
If you want a specific environment variable, then just type the name of it (e.g. PATH
), followed by a >
, and the filename to write to. The following will dump the PATH environment variable to a file named path.txt.
C:\> PATH > path.txt
Registry Method
The Windows Registry holds all the environment variables, in different places depending on which set you are after. You can use the registry Import/Export commands to shift them into the other PC.
For System Variables:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Environment
For User Variables:
HKEY_CURRENT_USER\Environment
-- or you could create a stored procedure ... first with Id creation
USE [db]
GO
/****** Object: StoredProcedure [dbo].[procUtils_InsertGeneratorWithId] Script Date: 06/13/2009 22:18:11 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
create PROC [dbo].[procUtils_InsertGeneratorWithId]
(
@domain_user varchar(50),
@tableName varchar(100)
)
as
--Declare a cursor to retrieve column specific information for the specified table
DECLARE cursCol CURSOR FAST_FORWARD FOR
SELECT column_name,data_type FROM information_schema.columns WHERE table_name = @tableName
OPEN cursCol
DECLARE @string nvarchar(3000) --for storing the first half of INSERT statement
DECLARE @stringData nvarchar(3000) --for storing the data (VALUES) related statement
DECLARE @dataType nvarchar(1000) --data types returned for respective columns
DECLARE @IDENTITY_STRING nvarchar ( 100 )
SET @IDENTITY_STRING = ' '
select @IDENTITY_STRING
SET @string='INSERT '+@tableName+'('
SET @stringData=''
DECLARE @colName nvarchar(50)
FETCH NEXT FROM cursCol INTO @colName,@dataType
IF @@fetch_status<>0
begin
print 'Table '+@tableName+' not found, processing skipped.'
close curscol
deallocate curscol
return
END
WHILE @@FETCH_STATUS=0
BEGIN
IF @dataType in ('varchar','char','nchar','nvarchar')
BEGIN
--SET @stringData=@stringData+'''''''''+isnull('+@colName+','''')+'''''',''+'
SET @stringData=@stringData+''''+'''+isnull('''''+'''''+'+@colName+'+'''''+''''',''NULL'')+'',''+'
END
ELSE
if @dataType in ('text','ntext') --if the datatype is text or something else
BEGIN
SET @stringData=@stringData+'''''''''+isnull(cast('+@colName+' as varchar(2000)),'''')+'''''',''+'
END
ELSE
IF @dataType = 'money' --because money doesn't get converted from varchar implicitly
BEGIN
SET @stringData=@stringData+'''convert(money,''''''+isnull(cast('+@colName+' as varchar(200)),''0.0000'')+''''''),''+'
END
ELSE
IF @dataType='datetime'
BEGIN
--SET @stringData=@stringData+'''convert(datetime,''''''+isnull(cast('+@colName+' as varchar(200)),''0'')+''''''),''+'
--SELECT 'INSERT Authorizations(StatusDate) VALUES('+'convert(datetime,'+isnull(''''+convert(varchar(200),StatusDate,121)+'''','NULL')+',121),)' FROM Authorizations
--SET @stringData=@stringData+'''convert(money,''''''+isnull(cast('+@colName+' as varchar(200)),''0.0000'')+''''''),''+'
SET @stringData=@stringData+'''convert(datetime,'+'''+isnull('''''+'''''+convert(varchar(200),'+@colName+',121)+'''''+''''',''NULL'')+'',121),''+'
-- 'convert(datetime,'+isnull(''''+convert(varchar(200),StatusDate,121)+'''','NULL')+',121),)' FROM Authorizations
END
ELSE
IF @dataType='image'
BEGIN
SET @stringData=@stringData+'''''''''+isnull(cast(convert(varbinary,'+@colName+') as varchar(6)),''0'')+'''''',''+'
END
ELSE --presuming the data type is int,bit,numeric,decimal
BEGIN
--SET @stringData=@stringData+'''''''''+isnull(cast('+@colName+' as varchar(200)),''0'')+'''''',''+'
--SET @stringData=@stringData+'''convert(datetime,'+'''+isnull('''''+'''''+convert(varchar(200),'+@colName+',121)+'''''+''''',''NULL'')+'',121),''+'
SET @stringData=@stringData+''''+'''+isnull('''''+'''''+convert(varchar(200),'+@colName+')+'''''+''''',''NULL'')+'',''+'
END
SET @string=@string+@colName+','
FETCH NEXT FROM cursCol INTO @colName,@dataType
END
DECLARE @Query nvarchar(4000)
SET @query ='SELECT '''+substring(@string,0,len(@string)) + ') VALUES(''+ ' + substring(@stringData,0,len(@stringData)-2)+'''+'')'' FROM '+@tableName
exec sp_executesql @query
--select @query
CLOSE cursCol
DEALLOCATE cursCol
/*
USAGE
*/
GO
-- and second without iD INSERTION
USE [db]
GO
/****** Object: StoredProcedure [dbo].[procUtils_InsertGenerator] Script Date: 06/13/2009 22:20:52 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE PROC [dbo].[procUtils_InsertGenerator]
(
@domain_user varchar(50),
@tableName varchar(100)
)
as
--Declare a cursor to retrieve column specific information for the specified table
DECLARE cursCol CURSOR FAST_FORWARD FOR
-- SELECT column_name,data_type FROM information_schema.columns WHERE table_name = @tableName
/* NEW
SELECT c.name , sc.data_type FROM sys.extended_properties AS ep
INNER JOIN sys.tables AS t ON ep.major_id = t.object_id
INNER JOIN sys.columns AS c ON ep.major_id = c.object_id AND ep.minor_id
= c.column_id
INNER JOIN INFORMATION_SCHEMA.COLUMNS sc ON t.name = sc.table_name and
c.name = sc.column_name
WHERE t.name = @tableName and c.is_identity=0
*/
select object_name(c.object_id) "TABLE_NAME", c.name "COLUMN_NAME", s.name "DATA_TYPE"
from sys.columns c
join sys.systypes s on (s.xtype = c.system_type_id)
where object_name(c.object_id) in (select name from sys.tables where name not like 'sysdiagrams')
AND object_name(c.object_id) in (select name from sys.tables where [name]=@tableName ) and c.is_identity=0 and s.name not like 'sysname'
OPEN cursCol
DECLARE @string nvarchar(3000) --for storing the first half of INSERT statement
DECLARE @stringData nvarchar(3000) --for storing the data (VALUES) related statement
DECLARE @dataType nvarchar(1000) --data types returned for respective columns
DECLARE @IDENTITY_STRING nvarchar ( 100 )
SET @IDENTITY_STRING = ' '
select @IDENTITY_STRING
SET @string='INSERT '+@tableName+'('
SET @stringData=''
DECLARE @colName nvarchar(50)
FETCH NEXT FROM cursCol INTO @tableName , @colName,@dataType
IF @@fetch_status<>0
begin
print 'Table '+@tableName+' not found, processing skipped.'
close curscol
deallocate curscol
return
END
WHILE @@FETCH_STATUS=0
BEGIN
IF @dataType in ('varchar','char','nchar','nvarchar')
BEGIN
--SET @stringData=@stringData+'''''''''+isnull('+@colName+','''')+'''''',''+'
SET @stringData=@stringData+''''+'''+isnull('''''+'''''+'+@colName+'+'''''+''''',''NULL'')+'',''+'
END
ELSE
if @dataType in ('text','ntext') --if the datatype is text or something else
BEGIN
SET @stringData=@stringData+'''''''''+isnull(cast('+@colName+' as varchar(2000)),'''')+'''''',''+'
END
ELSE
IF @dataType = 'money' --because money doesn't get converted from varchar implicitly
BEGIN
SET @stringData=@stringData+'''convert(money,''''''+isnull(cast('+@colName+' as varchar(200)),''0.0000'')+''''''),''+'
END
ELSE
IF @dataType='datetime'
BEGIN
--SET @stringData=@stringData+'''convert(datetime,''''''+isnull(cast('+@colName+' as varchar(200)),''0'')+''''''),''+'
--SELECT 'INSERT Authorizations(StatusDate) VALUES('+'convert(datetime,'+isnull(''''+convert(varchar(200),StatusDate,121)+'''','NULL')+',121),)' FROM Authorizations
--SET @stringData=@stringData+'''convert(money,''''''+isnull(cast('+@colName+' as varchar(200)),''0.0000'')+''''''),''+'
SET @stringData=@stringData+'''convert(datetime,'+'''+isnull('''''+'''''+convert(varchar(200),'+@colName+',121)+'''''+''''',''NULL'')+'',121),''+'
-- 'convert(datetime,'+isnull(''''+convert(varchar(200),StatusDate,121)+'''','NULL')+',121),)' FROM Authorizations
END
ELSE
IF @dataType='image'
BEGIN
SET @stringData=@stringData+'''''''''+isnull(cast(convert(varbinary,'+@colName+') as varchar(6)),''0'')+'''''',''+'
END
ELSE --presuming the data type is int,bit,numeric,decimal
BEGIN
--SET @stringData=@stringData+'''''''''+isnull(cast('+@colName+' as varchar(200)),''0'')+'''''',''+'
--SET @stringData=@stringData+'''convert(datetime,'+'''+isnull('''''+'''''+convert(varchar(200),'+@colName+',121)+'''''+''''',''NULL'')+'',121),''+'
SET @stringData=@stringData+''''+'''+isnull('''''+'''''+convert(varchar(200),'+@colName+')+'''''+''''',''NULL'')+'',''+'
END
SET @string=@string+@colName+','
FETCH NEXT FROM cursCol INTO @tableName , @colName,@dataType
END
DECLARE @Query nvarchar(4000)
SET @query ='SELECT '''+substring(@string,0,len(@string)) + ') VALUES(''+ ' + substring(@stringData,0,len(@stringData)-2)+'''+'')'' FROM '+@tableName
exec sp_executesql @query
--select @query
CLOSE cursCol
DEALLOCATE cursCol
/*
use poc
go
DECLARE @RC int
DECLARE @domain_user varchar(50)
DECLARE @tableName varchar(100)
-- TODO: Set parameter values here.
set @domain_user='yorgeorg'
set @tableName = 'tbGui_WizardTabButtonAreas'
EXECUTE @RC = [POC].[dbo].[procUtils_InsertGenerator]
@domain_user
,@tableName
*/
GO
You don't need to update anything. Just download the SDK for API 25 from Android SDK Manager or by launching Android standalone SDK manager. The error is for missing platform and not for missing tool.
To start:
Pros:
Cons:
I think it should be
import webbrowser
webbrowser.open('http://gatedin.com')
NOTE: make sure that you give http or https
if you give "www." instead of "http:" instead of opening a broser the interprete displays boolean OutPut TRUE. here you are importing webbrowser library
You're missing ;
s. The general syntax if you put it all in one line would be:
if thing ; then ... ; else ... ; fi
The thing
can be pretty much anything that returns an exit code. The then
branch is taken if that thing
returns 0, the else
branch otherwise.
[
isn't syntax, it's the test
program (check out ls /bin/[
, it actually exists, man test
for the docs – although can also have a built-in version with different/additional features.) which is used to test various common conditions on files and variables. (Note that [[
on the other hand is syntax and is handled by your shell, if it supports it).
For your case, you don't want to use test
directly, you want to test something on the remote host. So try something like:
if ssh user@host test -e "$file" ; then ... ; else ... ; fi
I could not really work with the above. So this might help someone.
$http.get(url)
.then(
function(response) {
console.log('get',response)
}
).catch(
function(response) {
console.log('return code: ' + response.status);
}
)
See also the $http response
parameter.
I suggest you use http-request, so that even redirects are managed.
var http = require('http-request');
var options = {url: 'http://localhost/foo.pdf'};
http.get(options, '/path/to/foo.pdf', function (error, result) {
if (error) {
console.error(error);
} else {
console.log('File downloaded at: ' + result.file);
}
});
If you have your folder as an object, let's say that you created it in the same script using next command:
$folder = New-Item -ItemType Directory -Force -Path "c:\tmp" -Name "myFolder"
Then you can just remove it like this in the same script
$folder.Delete($true)
$true - states for recursive removal
In my case, the separate project that contained the namespace was a Console Application. Changing it to a Class Library fixed the problem.
I thought I'd try code this up for fun:
graph = {
'1': ['2', '3', '4'],
'2': ['5', '6'],
'5': ['9', '10'],
'4': ['7', '8'],
'7': ['11', '12']
}
def bfs(graph, forefront, end):
# assumes no cycles
next_forefront = [(node, path + ',' + node) for i, path in forefront if i in graph for node in graph[i]]
for node,path in next_forefront:
if node==end:
return path
else:
return bfs(graph,next_forefront,end)
print bfs(graph,[('1','1')],'11')
# >>>
# 1, 4, 7, 11
If you want cycles you could add this:
for i, j in for_front: # allow cycles, add this code
if i in graph:
del graph[i]
You have to put the entire path as a parameter to os.path.split. See The docs. It doesn't work like string split.
I know this topic is old, but I have a simpler working solution without export the variables. Can be a oneliner, but I prefer to split using \
on line end.
var1='myVar1'\
var2=2\
var3=${var1}\
envsubst '$var1,$var3' < "source.txt" > "destination.txt"
# ^^^^^^^^^^^ ^^^^^^^^^^ ^^^^^^^^^^^^^^^
# define which to replace input output
The variables need to be defined to the same line as envsubst
is to get considered as environment variables.
The '$var1,$var3'
is optional to only replace the specified ones. Imagine an input file containing ${VARIABLE_USED_BY_JENKINS}
which should not be replaced.
You can also use this convoluted command, which does not trigger a warning about terminating its own process:
osascript -e "do shell script \"osascript -e \\\"tell application \\\\\\\"Terminal\\\\\\\" to quit\\\" &> /dev/null &\""; exit
This command is quite long, so you could define an alias (such as quit
) in your bash profile:
alias quit='osascript -e "do shell script \"osascript -e \\\"tell application \\\\\\\"Terminal\\\\\\\" to quit\\\" &> /dev/null &\""; exit'
This would allow you to simply type quit
into terminal without having to fiddle with any other settings.
Unfortunately it's not just about reading uncommitted data. In the background you may end up reading pages twice (in the case of a page split), or you may miss the pages altogether. So your results may be grossly skewed.
Check out Itzik Ben-Gan's article. Here's an excerpt:
" With the NOLOCK hint (or setting the isolation level of the session to READ UNCOMMITTED) you tell SQL Server that you don't expect consistency, so there are no guarantees. Bear in mind though that "inconsistent data" does not only mean that you might see uncommitted changes that were later rolled back, or data changes in an intermediate state of the transaction. It also means that in a simple query that scans all table/index data SQL Server may lose the scan position, or you might end up getting the same row twice. "
Or you can use the function below for removing non-ascii character from the string. You will get know internal working.
private static String removeNonASCIIChar(String str) {
StringBuffer buff = new StringBuffer();
char chars[] = str.toCharArray();
for (int i = 0; i < chars.length; i++) {
if (0 < chars[i] && chars[i] < 127) {
buff.append(chars[i]);
}
}
return buff.toString();
}
Starting with API level 18 (Jellybean MR2) you can cancel Notifications other than your own via NotificationListenerService.
@TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR2)
public class MyNotificationListenerService extends NotificationListenerService {...}
...
private void clearNotificationExample(StatusBarNotification sbn) {
myNotificationListenerService.cancelNotification(sbn.getPackageName(), sbn.getTag(), sbn.getId());
}
Making changes as below and redeploying on server content type as
Response.ContentType = "application/octet-stream";
This worked for me.
Response.Clear();
Response.AddHeader("Content-Disposition", "attachment; filename=" + file.Name);
Response.AddHeader("Content-Length", file.Length.ToString());
Response.ContentType = "application/octet-stream";
Response.WriteFile(file.FullName);
Response.End();
Alt simplification of https://stackoverflow.com/users/1969435/gx1sptdtda above:
cond <-c(1,2,3)
rating <-c(100,200,300)
df <- data.frame(cond, rating)
df
cond rating
1 1 100
2 2 200
3 3 300
To expand on J.F. Sebastian's answer:
You can use git-rebase to easily make all kinds of changes to your commit history.
After running git rebase --interactive you get the following in your $EDITOR:
pick 366eca1 This has a huge file
pick d975b30 delete foo
pick 121802a delete bar
# Rebase 57d0b28..121802a onto 57d0b28
#
# Commands:
# p, pick = use commit
# r, reword = use commit, but edit the commit message
# e, edit = use commit, but stop for amending
# s, squash = use commit, but meld into previous commit
You can move lines to change the order of commits and delete lines to remove that commit. Or you can add a command to combine (squash) two commits into a single commit (previous commit is the above commit), edit commits (what was changed), or reword commit messages.
I think pick just means that you want to leave that commit alone.
(Example is from here)
You want to it display like "-4, 5, -5, 6, -6," (two spaces),you can add the following code to string.xml
<string name="spelatonertext3"> "-4,  5, -5,  6,  -6,"</string>
is display one space.
Try:
psql -U role_name -d database -h hostname..com -W
<input type="date" id="myDate" />
<script type="text/javascript">
function SetDate()
{
var date = new Date();
var day = date.getDate();
var month = date.getMonth() + 1;
var year = date.getFullYear();
if (month < 10) month = "0" + month;
if (day < 10) day = "0" + day;
var today = year + "-" + month + "-" + day;
document.getElementById('myDate').value = today;
}
</script>
<body onload="SetDate();">
found here: http://jsbin.com/oqekar/1/edit?html,js,output
Just use a onchnage Event
for select box.
<select id="selectbox" name="" onchange="javascript:location.href = this.value;">
<option value="https://www.yahoo.com/" selected>Option1</option>
<option value="https://www.google.co.in/">Option2</option>
<option value="https://www.gmail.com/">Option3</option>
</select>
And if selected option to be loaded at the page load then add some javascript code
<script type="text/javascript">
window.onload = function(){
location.href=document.getElementById("selectbox").value;
}
</script>
for jQuery: Remove the onchange event from <select>
tag
jQuery(function () {
// remove the below comment in case you need chnage on document ready
// location.href=jQuery("#selectbox").val();
jQuery("#selectbox").change(function () {
location.href = jQuery(this).val();
})
})
your .key file contains illegal characters. you can check .key file like this:
# file server.key
output "server.key: UTF-8 Unicode (with BOM) text" means it is a plain text, not a key file. The correct output should be "server.key: PEM RSA private key".
use below command to remove illegal characters:
# tail -c +4 server.key > new_server.key
The new_server.key should be correct.
For more detail, you can click here, thanks for the post.
It's very simple in ROR to create a model that references other.
rails g model Item name:string description:text product:references
This code will add 'product_id' column in the Item table
Late Answer but worth it .
You need to load the lines in array or list object where each line will be assign to an index ,then simply call any range of lines by their index in for loop .
Solution is pretty Good ,but there is a memory consumption in between .
give it try ...Its worth it
Using MAMP I changed the host=localhost
to host=127.0.0.1
. But a new issue came "connection refused"
Solved this by putting 'port' => '8889'
, in 'Datasources' => [
Question 1:
vectorOfGamers.push_back(Player)
This is problematic because you cannot directly push a class name into a vector. You can either push an object of class into the vector or push reference or pointer to class type into the vector. For example:
vectorOfGamers.push_back(Player(name, id))
//^^assuming name and id are parameters to the vector, call Player constructor
//^^In other words, push `instance` of Player class into vector
Question 2:
These 3 classes derives from Gamer. Can I create vector to hold objects of Dealer, Bot and Player at the same time? How do I do that?
Yes you can. You can create a vector of pointers that points to the base class Gamer
.
A good choice is to use a vector of smart_pointer
, therefore, you do not need to manage pointer memory by yourself. Since the other three classes are derived from Gamer
, based on polymorphism, you can assign derived class objects to base class pointers. You may find more information from this post: std::vector of objects / pointers / smart pointers to pass objects (buss error: 10)?
No need to define a new interface when you can use an existing one: android.os.Handler.Callback
. Pass an object of type Callback, and invoke callback's handleMessage(Message msg)
.
For Location runtime Permission
ActivityCompat.requestPermissions(this,new String[]{android.Manifest.permission.ACCESS_FINE_LOCATION}, 1);
public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {
switch (requestCode) {
case 1: {
// If request is cancelled, the result arrays are empty.
if (grantResults.length > 0
&& grantResults[0] == PackageManager.PERMISSION_GRANTED) {
Log.d("yes","yes");
} else {
Log.d("yes","no");
// permission denied, boo! Disable the
// functionality that depends on this permission.
}
return;
}
// other 'case' lines to check for other
// permissions this app might request
}
}
Quote:
Arrays of generic types are not allowed because they're not sound. The problem is due to the interaction of Java arrays, which are not statically sound but are dynamically checked, with generics, which are statically sound and not dynamically checked. Here is how you could exploit the loophole:
class Box<T> { final T x; Box(T x) { this.x = x; } } class Loophole { public static void main(String[] args) { Box<String>[] bsa = new Box<String>[3]; Object[] oa = bsa; oa[0] = new Box<Integer>(3); // error not caught by array store check String s = bsa[0].x; // BOOM! } }
We had proposed to resolve this problem using statically safe arrays (aka Variance) bute that was rejected for Tiger.
-- gafter
(I believe it is Neal Gafter, but am not sure)
See it in context here: http://forums.sun.com/thread.jspa?threadID=457033&forumID=316
Since no one else said it, the short-cut to compile (build) a C# app in Visual Studio Code (VSCode) is SHIFT+CTRL+B
.
If you want to see the build errors (because they don't pop-up by default), the shortcut is SHIFT+CTRL+M
.
(I know this question was asking for more than just the build shortcut. But I wanted to answer the question in the title, which wasn't directly answered by other answers/comments.)
#!/usr/bin/perl -w
$fileToLocate = '/whatever/path/for/file/you/are/searching/MyFile.txt';
if (-e $fileToLocate) {
print "File is present";
}
grep -c ^processor /proc/cpuinfo
will count the number of lines starting with "processor" in /proc/cpuinfo
For systems with hyper-threading, you can use
grep ^cpu\\scores /proc/cpuinfo | uniq | awk '{print $4}'
which should return (for example) 8
(whereas the command above would return 16
)
In my case with the given code, I was able to parse the value of the passed parameter in this way.
const express = require('express');
const bodyParser = require('body-parser');
const app = express();
app.use(bodyParser.urlencoded({ extended: false }));
//url/par1=val1&par2=val2
let val1= req.body.par1;
let val2 = req.body.par2;
_x000D_
scp -i ~/.ssh/key.pem ec2-user@ip:/home/ec2-user/file-to-copy.txt .
The file name shouldnt be between the pem file and the ec2-user string - that doesnt work. This also allows you to reserve the name of the copied file.
git fetch origin our-team
or
git pull origin our-team
but first you should make sure that you already on the branch you want to update to (featurex).
It was changed between 3.1 and 3.2:
This is a terse description of the new features added to bash-3.2 since the release of bash-3.1.
Quoting the string argument to the [[ command's =~ operator now forces string matching, as with the other pattern-matching operators.
So use it without the quotes thus:
i="test"
if [[ $i =~ 200[78] ]] ; then
echo "OK"
else
echo "not OK"
fi
Either:
DateTime dt = new DateTime();
or
DateTime dt = default(DateTime);
Use datetime.datetime.strptime
:
>>> import datetime
>>> date = datetime.datetime.strptime('2012-02-10', '%Y-%m-%d')
>>> date.isoweekday()
5
If you're not on exact root of C:/ drive then first of all use cd../.. and then use query mysql -u username -p passsword
using the above lines you can access to mysql database.
I prefer inline-block, although float is also useful. Table-cell isn't rendered correctly by old IEs (neither does inline-block, but there's the zoom: 1; *display: inline
hack that I use frequently). If you have children that have a smaller height than their parent, floats will bring them to the top, whereas inline-block will screw up sometimes.
Most of the time, the browser will interpret everything correctly, unless, of course, it's IE. You always have to check to make sure that IE doesn't suck-- for example, the table-cell concept.
In all reality, yes, it boils down to personal preference.
One technique you could use to get rid of white space would be to set a font-size
of 0 to the parent, then give the font-size
back to the children, although that's a hassle, and gross.
204 No Content
The server has fulfilled the request but does not need to return an entity-body, and might want to return updated metainformation. The response MAY include new or updated metainformation in the form of entity-headers, which if present SHOULD be associated with the requested variant.
According to the RFC part for the status code 204, it seems to me a valid choice for a GET request.
A 404 Not Found
, 200 OK
with empty body and 204 No Content
have completely different meaning, sometimes we can't use proper status code but bend the rules and they will come back to bite you one day or later. So, if you can use proper status code, use it!
I think the choice of GET or POST is very personal as both of them will do the work but I would recommend you to keep a POST instead of a GET, for two reasons:
If you want to fetch + merge, run
git pull
if you want simply to fetch :
git fetch
I've seen both methods been used in seed files.
// Uncomment the below to wipe the table clean before populating
DB::table('table_name')->truncate();
//or
DB::table('table_name')->delete();
Even though you can not use the first one if you want to set foreign keys.
Cannot truncate a table referenced in a foreign key constraint
So it might be a good idea to use the second one.
When you want to treat lambda expressions as expression trees and look inside them instead of executing them. For example, LINQ to SQL gets the expression and converts it to the equivalent SQL statement and submits it to server (rather than executing the lambda).
Conceptually, Expression<Func<T>>
is completely different from Func<T>
. Func<T>
denotes a delegate
which is pretty much a pointer to a method and Expression<Func<T>>
denotes a tree data structure for a lambda expression. This tree structure describes what a lambda expression does rather than doing the actual thing. It basically holds data about the composition of expressions, variables, method calls, ... (for example it holds information such as this lambda is some constant + some parameter). You can use this description to convert it to an actual method (with Expression.Compile
) or do other stuff (like the LINQ to SQL example) with it. The act of treating lambdas as anonymous methods and expression trees is purely a compile time thing.
Func<int> myFunc = () => 10; // similar to: int myAnonMethod() { return 10; }
will effectively compile to an IL method that gets nothing and returns 10.
Expression<Func<int>> myExpression = () => 10;
will be converted to a data structure that describes an expression that gets no parameters and returns the value 10:
While they both look the same at compile time, what the compiler generates is totally different.
It should probably be mentioned, that there are ways to omit bundle exec
(they are all stated in chapter 3.6.1 of Michael Hartls Ruby on Rails Tutorial book).
The simplest is to just use a sufficiently up-to-date version of RVM (>= 1.11.x).
If you're restricted to an earlier version of RVM, you can always use this method also mentioned by calasyr:
$ rvm get head && rvm reload
$ chmod +x $rvm_path/hooks/after_cd_bundler
$ bundle install --binstubs=./bundler_stubs
The bundler_stubs
directory should then also be added to the .gitignore
file.
A third option is to use the rubygems-bundler
gem if you're not using RVM:
$ gem install rubygems-bundler
$ gem regenerate_binstubs
You can use getChanges()
on Eloquent model even after persisting.
You have to delete org.eclipse.e4.workbench folder inside metadata.plugins\ which you can find in your workspace folder. Deleting this folder solved the problem for me, hope it helps someone else!
The JPanel
is actually only a container where you can put different elements in it (even other JPanels
). So in your case I would suggest one big JPanel
as some sort of main container for your window. That main panel you assign a Layout
that suits your needs ( here is an introduction to the layouts).
After you set the layout to your main panel you can add the paint panel and the other JPanels you want (like those with the text in it..).
JPanel mainPanel = new JPanel();
mainPanel.setLayout(new BoxLayout(mainPanel, BoxLayout.Y_AXIS));
JPanel paintPanel = new JPanel();
JPanel textPanel = new JPanel();
mainPanel.add(paintPanel);
mainPanel.add(textPanel);
This is just an example that sorts all sub panels vertically (Y-Axis). So if you want some other stuff at the bottom of your mainPanel (maybe some icons or buttons) that should be organized with another layout (like a horizontal layout), just create again a new JPanel as a container for all the other stuff and set setLayout(new BoxLayout(mainPanel, BoxLayout.X_AXIS)
.
As you will find out, the layouts are quite rigid and it may be difficult to find the best layout for your panels. So don't give up, read the introduction (the link above) and look at the pictures – this is how I do it :)
Or you can just use NetBeans to write your program. There you have a pretty easy visual editor (drag and drop) to create all sorts of Windows and Frames. (only understanding the code afterwards is ... tricky sometimes.)
Since there are some many people interested in this question, I wanted to provide a complete example of how to layout a JFrame to make it look like OP wants it to.
The class is called MyFrame and extends swings JFrame
public class MyFrame extends javax.swing.JFrame{
// these are the components we need.
private final JSplitPane splitPane; // split the window in top and bottom
private final JPanel topPanel; // container panel for the top
private final JPanel bottomPanel; // container panel for the bottom
private final JScrollPane scrollPane; // makes the text scrollable
private final JTextArea textArea; // the text
private final JPanel inputPanel; // under the text a container for all the input elements
private final JTextField textField; // a textField for the text the user inputs
private final JButton button; // and a "send" button
public MyFrame(){
// first, lets create the containers:
// the splitPane devides the window in two components (here: top and bottom)
// users can then move the devider and decide how much of the top component
// and how much of the bottom component they want to see.
splitPane = new JSplitPane();
topPanel = new JPanel(); // our top component
bottomPanel = new JPanel(); // our bottom component
// in our bottom panel we want the text area and the input components
scrollPane = new JScrollPane(); // this scrollPane is used to make the text area scrollable
textArea = new JTextArea(); // this text area will be put inside the scrollPane
// the input components will be put in a separate panel
inputPanel = new JPanel();
textField = new JTextField(); // first the input field where the user can type his text
button = new JButton("send"); // and a button at the right, to send the text
// now lets define the default size of our window and its layout:
setPreferredSize(new Dimension(400, 400)); // let's open the window with a default size of 400x400 pixels
// the contentPane is the container that holds all our components
getContentPane().setLayout(new GridLayout()); // the default GridLayout is like a grid with 1 column and 1 row,
// we only add one element to the window itself
getContentPane().add(splitPane); // due to the GridLayout, our splitPane will now fill the whole window
// let's configure our splitPane:
splitPane.setOrientation(JSplitPane.VERTICAL_SPLIT); // we want it to split the window verticaly
splitPane.setDividerLocation(200); // the initial position of the divider is 200 (our window is 400 pixels high)
splitPane.setTopComponent(topPanel); // at the top we want our "topPanel"
splitPane.setBottomComponent(bottomPanel); // and at the bottom we want our "bottomPanel"
// our topPanel doesn't need anymore for this example. Whatever you want it to contain, you can add it here
bottomPanel.setLayout(new BoxLayout(bottomPanel, BoxLayout.Y_AXIS)); // BoxLayout.Y_AXIS will arrange the content vertically
bottomPanel.add(scrollPane); // first we add the scrollPane to the bottomPanel, so it is at the top
scrollPane.setViewportView(textArea); // the scrollPane should make the textArea scrollable, so we define the viewport
bottomPanel.add(inputPanel); // then we add the inputPanel to the bottomPanel, so it under the scrollPane / textArea
// let's set the maximum size of the inputPanel, so it doesn't get too big when the user resizes the window
inputPanel.setMaximumSize(new Dimension(Integer.MAX_VALUE, 75)); // we set the max height to 75 and the max width to (almost) unlimited
inputPanel.setLayout(new BoxLayout(inputPanel, BoxLayout.X_AXIS)); // X_Axis will arrange the content horizontally
inputPanel.add(textField); // left will be the textField
inputPanel.add(button); // and right the "send" button
pack(); // calling pack() at the end, will ensure that every layout and size we just defined gets applied before the stuff becomes visible
}
public static void main(String args[]){
EventQueue.invokeLater(new Runnable(){
@Override
public void run(){
new MyFrame().setVisible(true);
}
});
}
}
Please be aware that this is only an example and there are multiple approaches to layout a window. It all depends on your needs and if you want the content to be resizable / responsive. Another really good approach would be the GridBagLayout which can handle quite complex layouting, but which is also quite complex to learn.
npm install --save bootstrap
afterwards, inside angular.json
(previously .angular-cli.json
) inside the project's root folder, find styles and add the bootstrap css file like this:
for angular 6
"styles": [
"../node_modules/bootstrap/dist/css/bootstrap.min.css",
"styles.css"
],
for angular 7
"styles": [
"node_modules/bootstrap/dist/css/bootstrap.min.css",
"src/styles.css"
],
1.you will use different locale array element in datepicker.js from following link https://github.com/smalot/bootstrap-datetimepicker/tree/master/js/locales
2.add array in datepicker.js like this:
$.fn.datepicker.Constructor = Datepicker;_x000D_
var dates = $.fn.datepicker.dates = {_x000D_
en: {_x000D_
days: ["Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday"],_x000D_
daysShort: ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun"],_x000D_
daysMin: ["Su", "Mo", "Tu", "We", "Th", "Fr", "Sa", "Su"],_x000D_
months: ["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"],_x000D_
monthsShort: ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"],_x000D_
today: "Today"_x000D_
},_x000D_
CN:{_x000D_
days: ["???", "???", "???", "???", "???", "???", "???", "???"],_x000D_
daysShort: ["??", "??", "??", "??", "??", "??", "??", "??"],_x000D_
daysMin: ["?", "?", "?", "?", "?", "?", "?", "?"],_x000D_
months: ["??", "??", "??", "??", "??", "??", "??", "??", "??", "??", "???", "???"],_x000D_
monthsShort: ["??", "??", "??", "??", "??", "??", "??", "??", "??", "??", "???", "???"],_x000D_
today: "??",_x000D_
suffix: [],_x000D_
meridiem: ["??", "??"]_x000D_
}_x000D_
};
_x000D_
To test a bit you would do the following: (assuming flags is a 32 bit number)
Test Bit:
if((flags & 0x08) == 0x08)
(If bit 4 is set then its true)
Toggle Back (1 - 0 or 0 - 1): flags = flags ^ 0x08;
Reset Bit 4 to Zero: flags = flags & 0xFFFFFF7F;
In Swift 2.0:
UIApplication.sharedApplication().openURL(NSURL(string: "http://stackoverflow.com")!)
I have this array as my request data from a HTML+Vue.js data grid/table:
[0] => Array
(
[item_id] => 1
[item_no] => 3123
[size] => 3e
)
[1] => Array
(
[item_id] => 2
[item_no] => 7688
[size] => 5b
)
And use this to validate which works properly:
$this->validate($request, [
'*.item_id' => 'required|integer',
'*.item_no' => 'required|integer',
'*.size' => 'required|max:191',
]);
I am creating Dialog in onCreate
and using it with show
and hide
. For me the root cause was not dismissing onBackPressed
, which was finishing the Home
activity.
@Override
public void onBackPressed() {
new AlertDialog.Builder(this)
.setTitle("Really Exit?")
.setMessage("Are you sure you want to exit?")
.setNegativeButton(android.R.string.no, null)
.setPositiveButton(android.R.string.yes,
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog,
int which) {
Home.this.finish();
return;
}
}).create().show();
I was finishing the Home Activity onBackPressed
without closing / dismissing my dialogs.
When I dismissed my dialogs the crash disappeared.
new AlertDialog.Builder(this)
.setTitle("Really Exit?")
.setMessage("Are you sure you want to exit?")
.setNegativeButton(android.R.string.no, null)
.setPositiveButton(android.R.string.yes,
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog,
int which) {
networkErrorDialog.dismiss() ;
homeLocationErrorDialog.dismiss() ;
currentLocationErrorDialog.dismiss() ;
Home.this.finish();
return;
}
}).create().show();
As seen in Gradle (Eclipse plugin)
http://www.gradle.org/get-started
Gradle uses whichever JDK it finds in your path (to check, use java -version). Alternatively, you can set the JAVA_HOME environment variable to point to the install directory of the desired JDK.
If you are using this Eclipse plugin or Enide Studio 2014, alternative JAVA_HOME to use (set in Preferences) will be in version 0.15, see http://www.nodeclipse.org/history
You can do:
$ pip install "package>=0.2,<0.3"
And pip
will look for the best match, assuming the version is at least 0.2, and less than 0.3.
This also applies to pip requirements files. See the full details on version specifiers in PEP 440.
In Gitlab CE 9.0, You can change the default branch from the Settings Tab in a repository's header.
Performance wise StringBuffer is much better than String ; because whenever you apply concatenation on String Object then new String object are created on each concatenation.
Principal Rule : String are immutable(Non Modifiable) and StringBuffer are mutable(Modifiable)
Here is the programmatic experiment where you get the performance difference
public class Test {
public static int LOOP_ITERATION= 100000;
public static void stringTest(){
long startTime = System.currentTimeMillis();
String string = "This";
for(int i=0;i<LOOP_ITERATION;i++){
string = string+"Yasir";
}
long endTime = System.currentTimeMillis();
System.out.println(endTime - startTime);
}
public static void stringBufferTest(){
long startTime = System.currentTimeMillis();
StringBuffer stringBuffer = new StringBuffer("This");
for(int i=0;i<LOOP_ITERATION;i++){
stringBuffer.append("Yasir");
}
long endTime = System.currentTimeMillis();
System.out.println(endTime - startTime);
}
public static void main(String []args){
stringTest()
stringBufferTest();
}
}
Output of String are in my machine 14800
Output of StringBuffer are in my machine 14
It depends what is a use of those tables, but you might consider putting trigger on original table on insert and update. When insert or update is done, update the second table based on only one item from the original table. It will be quicker.
If you are catching an exception type, you do not need to throw it, unless you are going to rethrow it. In the example you post, the developer should have done one or another, not both.
Typically, if you are not going to do anything with the exception, you should not catch it.
The most dangerous thing you can do is catch an exception and not do anything with it.
A good discussion of when it is appropriate to throw exceptions is here
If you have a hidden field like this
<asp:HiddenField ID="HiddenField1" runat="server" Value='<%# Eval("VertragNr") %>'/>
Now you can use your value like this
$(this).parent().find('input[type=hidden]').val()
The java.util.Date/Calendar classes are a mess and should be avoided.
Update: The Joda-Time project is in maintenance mode. The team advises migration to the java.time classes.
Here's your answer using the Joda-Time 2.3 library. Very easy.
As noted in the example code, I suggest you use named time zones wherever possible so that your programming can handle Daylight Saving Time (DST) and other anomalies.
If you had placed a T
in the middle of your string instead of a space, you could skip the first two lines of code, dealing with a formatter to parse the string. The DateTime constructor can take a string in ISO 8601 format.
// © 2013 Basil Bourque. This source code may be used freely forever by anyone taking full responsibility for doing so.
// import org.joda.time.*;
// import org.joda.time.format.*;
// Parse string as a date-time in UTC (no time zone offset).
DateTimeFormatter formatter = org.joda.time.format.DateTimeFormat.forPattern( "yyyy-MM-dd' 'HH:mm:ss" );
DateTime dateTimeInUTC = formatter.withZoneUTC().parseDateTime( "2011-10-06 03:35:05" );
// Adjust for 13 hour offset from UTC/GMT.
DateTimeZone offsetThirteen = DateTimeZone.forOffsetHours( 13 );
DateTime thirteenDateTime = dateTimeInUTC.toDateTime( offsetThirteen );
// Hard-coded offsets should be avoided. Better to use a desired time zone for handling Daylight Saving Time (DST) and other anomalies.
// Time Zone list… http://joda-time.sourceforge.net/timezones.html
DateTimeZone timeZoneTongatapu = DateTimeZone.forID( "Pacific/Tongatapu" );
DateTime tongatapuDateTime = dateTimeInUTC.toDateTime( timeZoneTongatapu );
Dump those values…
System.out.println( "dateTimeInUTC: " + dateTimeInUTC );
System.out.println( "thirteenDateTime: " + thirteenDateTime );
System.out.println( "tongatapuDateTime: " + tongatapuDateTime );
When run…
dateTimeInUTC: 2011-10-06T03:35:05.000Z
thirteenDateTime: 2011-10-06T16:35:05.000+13:00
tongatapuDateTime: 2011-10-06T16:35:05.000+13:00
I would expect that the JVM gracefully interrupts (thread.interrupt()
) all the running threads created by the application, at least for signals SIGINT (kill -2)
and SIGTERM (kill -15)
.
This way, the signal will be forwarded to them, allowing a gracefully thread cancellation and resource finalization in the standard ways.
But this is not the case (at least in my JVM implementation: Java(TM) SE Runtime Environment (build 1.8.0_25-b17), Java HotSpot(TM) 64-Bit Server VM (build 25.25-b02, mixed mode)
.
As other users commented, the usage of shutdown hooks seems mandatory.
So, how do I would handle it?
Well first, I do not care about it in all programs, only in those where I want to keep track of user cancellations and unexpected ends. For example, imagine that your java program is a process managed by other. You may want to differentiate whether it has been terminated gracefully (SIGTERM
from the manager process) or a shutdown has occurred (in order to relaunch automatically the job on startup).
As a basis, I always make my long-running threads periodically aware of interrupted status and throw an InterruptedException
if they interrupted. This enables execution finalization in way controlled by the developer (also producing the same outcome as standard blocking operations). Then, at the top level of the thread stack, InterruptedException
is captured and appropriate clean-up performed. These threads are coded to known how to respond to an interruption request. High cohesion design.
So, in these cases, I add a shutdown hook, that does what I think the JVM should do by default: interrupt all the non-daemon threads created by my application that are still running:
Runtime.getRuntime().addShutdownHook(new Thread() {
@Override
public void run() {
System.out.println("Interrupting threads");
Set<Thread> runningThreads = Thread.getAllStackTraces().keySet();
for (Thread th : runningThreads) {
if (th != Thread.currentThread()
&& !th.isDaemon()
&& th.getClass().getName().startsWith("org.brutusin")) {
System.out.println("Interrupting '" + th.getClass() + "' termination");
th.interrupt();
}
}
for (Thread th : runningThreads) {
try {
if (th != Thread.currentThread()
&& !th.isDaemon()
&& th.isInterrupted()) {
System.out.println("Waiting '" + th.getName() + "' termination");
th.join();
}
} catch (InterruptedException ex) {
System.out.println("Shutdown interrupted");
}
}
System.out.println("Shutdown finished");
}
});
Complete test application at github: https://github.com/idelvall/kill-test
Group By X
means put all those with the same value for X in the one group.
Group By X, Y
means put all those with the same values for both X and Y in the one group.
To illustrate using an example, let's say we have the following table, to do with who is attending what subject at a university:
Table: Subject_Selection
+---------+----------+----------+
| Subject | Semester | Attendee |
+---------+----------+----------+
| ITB001 | 1 | John |
| ITB001 | 1 | Bob |
| ITB001 | 1 | Mickey |
| ITB001 | 2 | Jenny |
| ITB001 | 2 | James |
| MKB114 | 1 | John |
| MKB114 | 1 | Erica |
+---------+----------+----------+
When you use a group by
on the subject column only; say:
select Subject, Count(*)
from Subject_Selection
group by Subject
You will get something like:
+---------+-------+
| Subject | Count |
+---------+-------+
| ITB001 | 5 |
| MKB114 | 2 |
+---------+-------+
...because there are 5 entries for ITB001, and 2 for MKB114
If we were to group by
two columns:
select Subject, Semester, Count(*)
from Subject_Selection
group by Subject, Semester
we would get this:
+---------+----------+-------+
| Subject | Semester | Count |
+---------+----------+-------+
| ITB001 | 1 | 3 |
| ITB001 | 2 | 2 |
| MKB114 | 1 | 2 |
+---------+----------+-------+
This is because, when we group by two columns, it is saying "Group them so that all of those with the same Subject and Semester are in the same group, and then calculate all the aggregate functions (Count, Sum, Average, etc.) for each of those groups". In this example, this is demonstrated by the fact that, when we count them, there are three people doing ITB001 in semester 1, and two doing it in semester 2. Both of the people doing MKB114 are in semester 1, so there is no row for semester 2 (no data fits into the group "MKB114, Semester 2")
Hopefully that makes sense.
You can code like two input box inside one div
<div class="input-group">
<span class="input-group-addon"><i class="glyphicon glyphicon-user"></i></span>
<input style="width:50% " class="form-control " placeholder="first name" name="firstname" type="text" />
<input style="width:50% " class="form-control " placeholder="lastname" name="lastname" type="text" />
</div>
R.color.red
is an ID (which is also an int
), but is not a color.
Use one of the following instead:
// If you're in an activity:
Button11.setBackgroundColor(getResources().getColor(R.color.red));
// OR, if you're not:
Button11.setBackgroundColor(Button11.getContext().getResources().getColor(R.color.red));
Or, alternatively:
Button11.setBackgroundColor(Color.RED); // From android.graphics.Color
Or, for more pro skills:
Button11.setBackgroundColor(0xFFFF0000); // 0xAARRGGBB
"pwd -P" seems to work if you just want the directory, but if for some reason you want the name of the actual executable I don't think that helps. Here's my solution:
#!/bin/bash
# get the absolute path of the executable
SELF_PATH=$(cd -P -- "$(dirname -- "$0")" && pwd -P) && SELF_PATH=$SELF_PATH/$(basename -- "$0")
# resolve symlinks
while [[ -h $SELF_PATH ]]; do
# 1) cd to directory of the symlink
# 2) cd to the directory of where the symlink points
# 3) get the pwd
# 4) append the basename
DIR=$(dirname -- "$SELF_PATH")
SYM=$(readlink "$SELF_PATH")
SELF_PATH=$(cd "$DIR" && cd "$(dirname -- "$SYM")" && pwd)/$(basename -- "$SYM")
done
Oracle's error message should be somewhat longer. It usually looks like this:
ORA-00001: unique constraint (TABLE_UK1) violated
The name in parentheses is the constrait name. It tells you which constraint was violated.
After a bit of time (and more searching), I found this blog entry by Jomo Fisher.
One of the recent problems we’ve seen is that, because of the support for side-by-side runtimes, .NET 4.0 has changed the way that it binds to older mixed-mode assemblies. These assemblies are, for example, those that are compiled from C++\CLI. Currently available DirectX assemblies are mixed mode. If you see a message like this then you know you have run into the issue:
Mixed mode assembly is built against version 'v1.1.4322' of the runtime and cannot be loaded in the 4.0 runtime without additional configuration information.
[Snip]
The good news for applications is that you have the option of falling back to .NET 2.0 era binding for these assemblies by setting an app.config flag like so:
<startup useLegacyV2RuntimeActivationPolicy="true"> <supportedRuntime version="v4.0"/> </startup>
So it looks like the way the runtime loads mixed-mode assemblies has changed. I can't find any details about this change, or why it was done. But the useLegacyV2RuntimeActivationPolicy
attribute reverts back to CLR 2.0 loading.
The Json conversion should work out-of-the box. In order this to happen you need add some simple configurations:
First add a contentNegotiationManager into your spring config file. It is responsible for negotiating the response type:
<bean id="contentNegotiationManager"
class="org.springframework.web.accept.ContentNegotiationManagerFactoryBean">
<property name="favorPathExtension" value="false" />
<property name="favorParameter" value="true" />
<property name="ignoreAcceptHeader" value="true" />
<property name="useJaf" value="false" />
<property name="defaultContentType" value="application/json" />
<property name="mediaTypes">
<map>
<entry key="json" value="application/json" />
<entry key="xml" value="application/xml" />
</map>
</property>
</bean>
<mvc:annotation-driven
content-negotiation-manager="contentNegotiationManager" />
<context:annotation-config />
Then add Jackson2 jars (jackson-databind and jackson-core) in the service's class path. Jackson is responsible for the data serialization to JSON. Spring will detect these and initialize the MappingJackson2HttpMessageConverter automatically for you. Having only this configured I have my automatic conversion to JSON working. The described config has an additional benefit of giving you the possibility to serialize to XML if you set accept:application/xml header.
Because https://github.com/visionmedia/express
is the URL of a web page and not an npm module. Use this flavor: git+{url}.git
git+https://github.com/visionmedia/express.git
or this flavor if you need SSH:
git+ssh://[email protected]/visionmedia/express.git
When writing queries, this difference should be kept in mind :
DECLARE @A INT = 2
SELECT @A = TBL.A
FROM ( SELECT 1 A ) TBL
WHERE 1 = 2
SELECT @A
/* @A is 2*/
---------------------------------------------------------------
DECLARE @A INT = 2
SET @A = (
SELECT TBL.A
FROM ( SELECT 1 A) TBL
WHERE 1 = 2
)
SELECT @A
/* @A is null*/
The Resource Override extension allows you to do exactly that:
According to W3:
Partial URLs are interpreted relative to the source of the style sheet, not relative to the document
Therefore, in answer to your question, it will be relative to /stylesheets/
.
If you think about this, this makes sense, since the CSS file could be added to pages in different directories, so standardising it to the CSS file means that the URLs will work wherever the stylesheets are linked.
FileInfo.Length
will return the length of file, in bytes (not size on disk), so this is what you are looking for, I think.
Below I will insert a checkbox dynamically. Style is included to align the checkbox and most important to make sure word wrap is straight. the most important thing here is display: table-cell; for the alignment
The visual basic code.
'the code to dynamically insert a checkbox
Dim tbl As Table = New Table()
Dim tc1 As TableCell = New TableCell()
tc1.CssClass = "tdCheckTablecell"
'get the data for this checkbox
Dim ds As DataSet
Dim Company As ina.VullenCheckbox
Company = New ina.VullenCheckbox
Company.IDVeldenperScherm = HETid
Company.IDLoginBedrijf = HttpContext.Current.Session("welkbedrijf")
ds = Company.GetsDataVullenCheckbox("K_GetS_VullenCheckboxMasterDDLOmschrijvingVC") 'ds6
'create the checkbox
Dim radio As CheckBoxList = New CheckBoxList
radio.DataSource = ds
radio.ID = HETid
radio.CssClass = "tdCheck"
radio.DataTextField = "OmschrijvingVC"
radio.DataValueField = "IDVullenCheckbox"
radio.Attributes.Add("onclick", "documentChanged();")
radio.DataBind()
'connect the checkbox
tc1.Controls.Add(radio)
tr.Cells.Add(tc1)
tbl.Rows.Add(tr)
'the style for the checkbox
input[type="checkbox"] {float: left; width: 5%; height:20px; border: 1px solid black; }
.tdCheck label { width: 90%;display: table-cell; align:right;}
.tdCheck {width:100%;}
and the HTML output
<head id="HEAD1">
<title>
name
</title>
<meta content="Microsoft Visual Studio .NET 7.1" name="GENERATOR" /><meta content="Visual Basic .NET 7.1" name="CODE_LANGUAGE" />
</head>
<style type='text/css'>
input[type="checkbox"] {float: left; width: 20px; height:20px; }
.tdCheck label { width: 90%;display: table-cell; align:right;}
.tdCheck {width:100%;}
.tdLabel {width:100px;}
.tdCheckTableCell {width:400px;}
TABLE
{
vertical-align:top;
border:1;border-style:solid;margin:0;padding:0;border-spacing:0;
border-color:red;
}
TD
{
vertical-align:top; /*labels ed en de items in het datagrid*/
border: 1; border-style:solid;
border-color:green;
font-size:30px }
</style>
<body id="bodyInternet" >
<form name="Form2" method="post" action="main.aspx?B" id="Form2">
<table border="0">
<tr>
<td class="tdLabel">
<span id="ctl16_ID{A}" class="DynamicLabel">
TITLE
</span>
</td>
<td class="tdCheckTablecell">
<table id="ctl16_{A}" class="tdCheck" onclick="documentChanged();" border="0">
<tr>
<td>
<input id="ctl16_{A}_0" type="checkbox" name="ctl16${A}$0" />
<label for="ctl16_{A}_0">
this is just dummy text to show the text will warp this is just dummy text to show the text will warp this is just dummy text to show the text will warp this is just dummy text to show the text will warp this is just dummy text to show the text will warp this is just dummy text to show the text will warp
</label>
</td>
</tr>
<tr>
<td>
<input id="ctl16_{A}_1" type="checkbox" name="ctl16${A}$1" />
<label for="ctl16_{A}_1">
ITEM2
</label>
</td>
</tr>
<tr>
<td>
<input id="ctl16_{A}_2" type="checkbox" name="ctl16${A}$2" />
<label for="ctl16_{A}_2">
ITEM3
</label>
</td>
</tr>
</table>
</td>
</tr>
</table>
</form>
</body>
use this code to perform some UI related task after 2.0 seconds.
let delay = 2.0
let delayInNanoSeconds = dispatch_time(DISPATCH_TIME_NOW, Int64(delay * Double(NSEC_PER_SEC)))
let mainQueue = dispatch_get_main_queue()
dispatch_after(delayInNanoSeconds, mainQueue, {
print("Some UI related task after delay")
})
Swift 3.0 version
Following closure function execute some task after delay on main thread.
func performAfterDelay(delay : Double, onCompletion: @escaping() -> Void){
DispatchQueue.main.asyncAfter(deadline: DispatchTime.now() + delay, execute: {
onCompletion()
})
}
Call this function like:
performAfterDelay(delay: 4.0) {
print("test")
}
Set it with a px value. Changing the code like below should work
el.css('marginLeft', mrg + 'px');
You can add parameter columns or use dict
with key which is converted to column name:
np.random.seed(123)
e = np.random.normal(size=10)
dataframe=pd.DataFrame(e, columns=['a'])
print (dataframe)
a
0 -1.085631
1 0.997345
2 0.282978
3 -1.506295
4 -0.578600
5 1.651437
6 -2.426679
7 -0.428913
8 1.265936
9 -0.866740
e_dataframe=pd.DataFrame({'a':e})
print (e_dataframe)
a
0 -1.085631
1 0.997345
2 0.282978
3 -1.506295
4 -0.578600
5 1.651437
6 -2.426679
7 -0.428913
8 1.265936
9 -0.866740
LOAD DATA INFILE 'file.csv'
INTO TABLE t1
(column1, @dummy, column2, @dummy, column3, ...)
FIELDS TERMINATED BY ',' ENCLOSED BY '"' ESCAPED BY '"'
LINES TERMINATED BY '\r\n';
Just replace the column1, column2, etc.. with your column names, and put @dummy anwhere there's a column in the CSV you want to ignore.
Full details here.
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "ExampleSegueIdentifier" {
if let destinationVC = segue.destination as? ExampleSegueVC {
destinationVC.exampleString = "Example"
}
}
}
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if segue.identifier == "ExampleSegueIdentifier" {
if let destinationVC = segue.destinationViewController as? ExampleSegueVC {
destinationVC.exampleString = "Example"
}
}
}
I was receiving the error (I'm using Vue) and I switched my onclick="someFunction()"
to @click="someFunction"
and now they are working.
There's no good reason for 1
to be true and 0
to be false; that's just the way things have always been notated. So from a logical perspective, the function in your API isn't "wrong", per se.
That said, it's normally not advisable to work against the idioms of whatever language or framework you're using without a damn good reason to do so, so whoever wrote this function was probably pretty bone-headed, assuming it's not simply a bug.
I know this thread been pretty old but I just wanted to share one of my function. This function below can check for empty strings, string with maximum lengths, minimum lengths, or exact length. If you want to check for empty strings, just put $min_len and $max_len as 0.
function chk_str( $input, $min_len = null, $max_len = null ){
if ( !is_int($min_len) && $min_len !== null ) throw new Exception('chk_str(): $min_len must be an integer or a null value.');
if ( !is_int($max_len) && $max_len !== null ) throw new Exception('chk_str(): $max_len must be an integer or a null value.');
if ( $min_len !== null && $max_len !== null ){
if ( $min_len > $max_len ) throw new Exception('chk_str(): $min_len can\'t be larger than $max_len.');
}
if ( !is_string( $input ) ) {
return false;
} else {
$output = true;
}
if ( $min_len !== null ){
if ( strlen($input) < $min_len ) $output = false;
}
if ( $max_len !== null ){
if ( strlen($input) > $max_len ) $output = false;
}
return $output;
}
The {{variable}}
is substituted directly into the HTML. Do a view source; it isn't a "variable" or anything like it. It's just rendered text.
Having said that, you can put this kind of substitution into your JavaScript.
<script type="text/javascript">
var a = "{{someDjangoVariable}}";
</script>
This gives you "dynamic" javascript.
These are the command line arguments where:
$@
= stores all the arguments in a list of string
$*
= stores all the arguments as a single string
$#
= stores the number of arguments
I was able to export a jar file in Android Studio using this tutorial: https://www.youtube.com/watch?v=1i4I-Nph-Cw "How To Export Jar From Android Studio "
I updated my answer to include all the steps for exporting a JAR in Android Studio:
1) Create Android application project, go to app->build.gradle
2) Change the following in this file:
modify apply plugin: 'com.android.application' to apply plugin: 'com.android.library'
remove the following: applicationId, versionCode and versionName
Add the following code:
// Task to delete old jar task deleteOldJar(type: Delete){ delete 'release/AndroidPlugin2.jar' }
// task to export contents as jar
task exportJar(type: Copy) {
from ('build/intermediates/bundles/release/')
into ('release/')
include ('classes.jar')
rename('classes.jar', 'AndroidPlugin2.jar')
}
exportJar.dependsOn(deleteOldJar, build)
3) Don't forget to click sync now in this file (top right or use sync button).
4) Click on Gradle tab (usually middle right) and scroll down to exportjar
5) Once you see the build successful message in the run window, using normal file explorer go to exported jar using the path: C:\Users\name\AndroidStudioProjects\ProjectName\app\release you should see in this directory your jar file.
Good Luck :)
This is succinct and readable:
"MyProperty" -in $MyObject.PSobject.Properties.Name
We can put it in a function:
function HasProperty($object, $propertyName)
{
$propertyName -in $object.PSobject.Properties.Name
}
matplotlib.pyplot.hlines
:list
to the y
parameter.y
can be passed as a single location: y=40
y
can be passed as multiple locations: y=[39, 40, 41]
fig, ax = plt.subplots()
, then replace plt.hlines
or plt.axhline
with ax.hlines
or ax.axhline
, respectively.matplotlib.pyplot.axhline
can only plot a single location (e.g. y=40
)plt.plot
import numpy as np
import matplotlib.pyplot as plt
xs = np.linspace(1, 21, 200)
plt.figure(figsize=(6, 3))
plt.hlines(y=39.5, xmin=100, xmax=175, colors='aqua', linestyles='-', lw=2, label='Single Short Line')
plt.hlines(y=[39, 40, 41], xmin=[0, 25, 50], xmax=[len(xs)], colors='purple', linestyles='--', lw=2, label='Multiple Lines')
plt.legend(bbox_to_anchor=(1.04,0.5), loc="center left", borderaxespad=0)
ax.plot
import numpy as np
import matplotlib.pyplot as plt
xs = np.linspace(1, 21, 200)
fig, (ax1, ax2) = plt.subplots(2, 1, figsize=(6, 6))
ax1.hlines(y=40, xmin=0, xmax=len(xs), colors='r', linestyles='--', lw=2)
ax1.set_title('One Line')
ax2.hlines(y=[39, 40, 41], xmin=0, xmax=len(xs), colors='purple', linestyles='--', lw=2)
ax2.set_title('Multiple Lines')
plt.tight_layout()
plt.show()
xmin
and xmax
will accept a date like '2020-09-10'
or datetime(2020, 9, 10)
xmin=datetime(2020, 9, 10), xmax=datetime(2020, 9, 10) + timedelta(days=3)
date = df.index[9]
, xmin=date, xmax=date + pd.Timedelta(days=3)
, where the index is a DatetimeIndex
.import pandas_datareader as web # conda or pip install this; not part of pandas
import pandas as pd
import matplotlib.pyplot as plt
# get test data
df = web.DataReader('^gspc', data_source='yahoo', start='2020-09-01', end='2020-09-28').iloc[:, :2]
# plot dataframe
ax = df.plot(figsize=(9, 6), title='S&P 500', ylabel='Price')
# add horizontal line
ax.hlines(y=3450, xmin='2020-09-10', xmax='2020-09-17', color='purple', label='test')
ax.legend()
plt.show()
web.DataReader
doesn't work.data = {pd.Timestamp('2020-09-01 00:00:00'): {'High': 3528.03, 'Low': 3494.6}, pd.Timestamp('2020-09-02 00:00:00'): {'High': 3588.11, 'Low': 3535.23}, pd.Timestamp('2020-09-03 00:00:00'): {'High': 3564.85, 'Low': 3427.41}, pd.Timestamp('2020-09-04 00:00:00'): {'High': 3479.15, 'Low': 3349.63}, pd.Timestamp('2020-09-08 00:00:00'): {'High': 3379.97, 'Low': 3329.27}, pd.Timestamp('2020-09-09 00:00:00'): {'High': 3424.77, 'Low': 3366.84}, pd.Timestamp('2020-09-10 00:00:00'): {'High': 3425.55, 'Low': 3329.25}, pd.Timestamp('2020-09-11 00:00:00'): {'High': 3368.95, 'Low': 3310.47}, pd.Timestamp('2020-09-14 00:00:00'): {'High': 3402.93, 'Low': 3363.56}, pd.Timestamp('2020-09-15 00:00:00'): {'High': 3419.48, 'Low': 3389.25}, pd.Timestamp('2020-09-16 00:00:00'): {'High': 3428.92, 'Low': 3384.45}, pd.Timestamp('2020-09-17 00:00:00'): {'High': 3375.17, 'Low': 3328.82}, pd.Timestamp('2020-09-18 00:00:00'): {'High': 3362.27, 'Low': 3292.4}, pd.Timestamp('2020-09-21 00:00:00'): {'High': 3285.57, 'Low': 3229.1}, pd.Timestamp('2020-09-22 00:00:00'): {'High': 3320.31, 'Low': 3270.95}, pd.Timestamp('2020-09-23 00:00:00'): {'High': 3323.35, 'Low': 3232.57}, pd.Timestamp('2020-09-24 00:00:00'): {'High': 3278.7, 'Low': 3209.45}, pd.Timestamp('2020-09-25 00:00:00'): {'High': 3306.88, 'Low': 3228.44}, pd.Timestamp('2020-09-28 00:00:00'): {'High': 3360.74, 'Low': 3332.91}}
df = pd.DataFrame.from_dict(data, 'index')
a += b
is essentially the same as a = a + b
, except that:
+
always returns a newly allocated object, but +=
should (but doesn't have to) modify the object in-place if it's mutable (e.g. list
or dict
, but int
and str
are immutable).
In a = a + b
, a
is evaluated twice.
If this is the first time you encounter the +=
operator, you may wonder why it matters that it may modify the object in-place instead of building a new one. Here is an example:
# two variables referring to the same list
>>> list1 = []
>>> list2 = list1
# += modifies the object pointed to by list1 and list2
>>> list1 += [0]
>>> list1, list2
([0], [0])
# + creates a new, independent object
>>> list1 = []
>>> list2 = list1
>>> list1 = list1 + [0]
>>> list1, list2
([0], [])
For windows, the default key for multi-line comment is Alt + Shift + A
For windows, the default key for single line comment is Ctrl + /