NUnit loads the unit tests in a seperate AppDomain, and I assume the entry point is not being called (probably not needed), hence the entry assembly is null.
This is more general than .NET and Windows. Managed is an environment where you have automatic memory management, garbage collection, type safety, ... unmanaged is everything else. So for example .NET is a managed environment and C/C++ is unmanaged.
To create user for phpMyAdmin :
sudo mysql -p -u root
Now you can add a new MySQL user with the username of your choice.
CREATE USER 'USERNAME'@'%' IDENTIFIED BY 'PASSWORD';
And finally grant superuser privileges to the user you just created.
GRANT ALL PRIVILEGES ON *.* TO 'USERNAME'@'%' WITH GRANT OPTION;
For any question, please leave a comment
A simple solution to generate unique identification is to use time token and add random number to it. I prefer to prefix it with "uuid-".
Below function will generate random string of type: uuid-14d93eb1b9b4533e6. One doesn't need to generate 32 chars random string. 16 char random string is more than sufficient in this case to provide the unique UUIDs in javascript.
var createUUID = function() { return"uuid-"+((new Date).getTime().toString(16)+Math.floor(1E7*Math.random()).toString(16)); }
I would use the algorithm detailed in the bug report using System.getenv(String), and fallback to using the user.dir property if none of the environment variables indicated a valid existing directory. This should work cross-platform.
I think, under Windows, what you are really after is the user's notional "documents" directory.
To exclude any file from a jar / target directory you can use the <excludes>
tag in your pom.xml file.
In the next example, all files with .properties
extension will not be included:
<build>
<resources>
<resource>
<directory>src/main/resources</directory>
<excludes>
<exclude>*.properties</exclude>
</excludes>
<filtering>false</filtering>
</resource>
</resources>
</build>
This answer builds up from the above excellent ones.
In most applications, you won't be calling logging.exception(e) directly. Most likely you have defined a custom logger specific for your application or module like this:
# Set the name of the app or module
my_logger = logging.getLogger('NEM Sequencer')
# Set the log level
my_logger.setLevel(logging.INFO)
# Let's say we want to be fancy and log to a graylog2 log server
graylog_handler = graypy.GELFHandler('some_server_ip', 12201)
graylog_handler.setLevel(logging.INFO)
my_logger.addHandler(graylog_handler)
In this case, just use the logger to call the exception(e) like this:
try:
1/0
except ZeroDivisionError, e:
my_logger.exception(e)
Quite simply:
An unusual but pretty way of doing it
Without index:
each _ in Array(5)
= 'a'
Will print: aaaaa
With index:
each _, i in Array(5)
= i
Will print: 01234
Notes: In the examples above, I have assigned the val
parameter of jade's each
iteration syntax to _
because it is required, but will always return undefined
.
I tried the following solution with the UITextArea and I expect this will work with UIButton as well.
First of all import this in your .m file -
#import <QuartzCore/QuartzCore.h>
and then in your loadView
method add following lines
yourButton.layer.cornerRadius = 10; // this value vary as per your desire
yourButton.clipsToBounds = YES;
inside your onClickListener.onClick, put
getFragmentManager().beginTransaction().replace(R.id.container, new tasks()).commit();
In another word, in your mycontacts.class
public class mycontacts extends Fragment {
public mycontacts() {
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
final View v = super.getView(position, convertView, parent);
ImageView purple = (ImageView) v.findViewById(R.id.imageView1);
purple.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
getFragmentManager()
.beginTransaction()
.replace(R.id.container, new tasks())
.commit();
}
});
return view;
}
}
now, remember R.id.container
is the container (FrameLayout or other layouts) for the activity that calls the fragment
Try adding a Reference to System.Configuration
, you get some of the configuration namespace by referencing the System namespace, adding the reference to System.Configuration should allow you to access ConfigurationManager
.
This is a known bug at MySQL.
As you can see this has been a known issue since 2008 and they have not fixed it yet!!!
WORK AROUND
You first need to create the database to import. It doesn't need any tables. Then you can import your database.
first start your MySQL command line (apply username and password if you need to)
C:\>mysql -u user -p
Create your database and exit
mysql> DROP DATABASE database;
mysql> CREATE DATABASE database;
mysql> Exit
Import your selected database from the dump file
C:\>mysql -u user -p -h localhost -D database -o < dumpfile.sql
You can replace localhost with an IP or domain for any MySQL server you want to import to. The reason for the DROP command in the mysql prompt is to be sure we start with an empty and clean database.
When a thread is executing and you want to execute the main UI thread which is blocked by current thread, then use the below:
current thread:
Dispatcher.CurrentDispatcher.Invoke(MethodName,
new object[] { parameter1, parameter2 }); // if passing 2 parameters to method.
Main UI thread:
Application.Current.Dispatcher.BeginInvoke(
DispatcherPriority.Background, new Action(() => MethodName(parameter)));
If you want your current uncommited changes on the current branch to move to a new branch, use the following command to create a new branch and copy the uncommitted changes automatically.
git checkout -b branch_name
This will create a new branch from your current branch (assuming it to be master), copy the uncommited changes and switch to the new branch.
Add files to stage & commit your changes to the new branch.
git add .
git commit -m "First commit"
Since, a new branch is created, before pushing it to remote, you need to set the upstream. Use the below command to set the upstream and push it to remote.
git push --set-upstream origin feature/feature/NEWBRANCH
Once you hit this command, a new branch will be created at the remote and your new local branch will be pushed to remote.
Now, if you want to throw away your uncommited changes from master branch, use:
git checkout master -f
This will throw away any uncommitted local changes on checkout.
A "connection refused" error happens when you attempt to open a TCP connection to an IP address / port where there is nothing currently listening for connections. If nothing is listening, the OS on the server side "refuses" the connection.
If this is happening intermittently, then the most likely explanations are (IMO):
Is this possible that this exception is caused when a search request is made from Android applications as our website don't support a request is being made from android applications.
It seems unlikely. You said that the "connection refused" exception message says that it is the proxy that is refusing the connection, not your server. Besides if a server was going to not handle certain kinds of request, it still has to accept the TCP connection to find out what the request is ... before it can reject it.
1 - For example, it could be a DNS that round-robin resolves the DNS name to different IP addresses. Or it could be an IP-based load balancer.
for centos, just zlib didn't solve the problem.I did
sudo yum install zlib-devel.i686
This is kind of a hack but the best solution that I have found is to use a description tag with no \item. This will produce an error from the latex compiler; however, the error does not prevent the pdf from being generated.
\begin{description}
<YOUR TEXT HERE>
\end{description}
I find redo.el
extremly handy for doing "normal" undo/redo, and I usually bind it to C-S-z and undo to C-z, like this:
(when (require 'redo nil 'noerror)
(global-set-key (kbd "C-S-z") 'redo))
(global-set-key (kbd "C-z") 'undo)
Just download the file, put it in your lisp-path and paste the above in your .emacs
.
What I did with spring-data-jpa-1.3 was adding a version to xsd and lowered it to 1.2. Then the error message disappears. Like this
<beans
xmlns="http://www.springframework.org/schema/beans"
...
xmlns:jpa="http://www.springframework.org/schema/data/jpa"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
...
http://www.springframework.org/schema/data/jpa
http://www.springframework.org/schema/data/jpa/spring-jpa-1.2.xsd">
Seems like it was fixed for for 1.2 but then appears again in 1.3.
The only thing that worked for me was creating a new application in the IIS, mapping it to exactly the same physical path, and changing only the authentication to be Anonymous.
A lot of dancing around the answer. You can add the UDF context help, but you have to export the Module and edit the contents in a text editor, then re-import it to VBA. Here's the example from Chip Pearson: Adding Code Attributes
The &&
function is not vectorized. You need the &
function:
EUR <- PCs[which(PCs$V13 < 9 & PCs$V13 > 3), ]
I think that a faster way is to use preg_match.
$user_input = 'Something website2.com or other';
$owned_urls_array = array('website1.com', 'website2.com', 'website3.com');
if ( preg_match('('.implode('|',$owned_urls_array).')', $user_input)){
echo "Match found";
}else{
echo "Match not found";
}
There is no (standard) cross-platform way to do this. On windows, try using conio.h
.
It has the:
textcolor(); // and
textbackground();
functions.
For example:
textcolor(RED);
cprintf("H");
textcolor(BLUE);
cprintf("e");
// and so on.
you can return all rows and than use php datediff function inside an if statement, although that will put extra load on the server.
if(dateDiff(date("Y/m/d"), $row['date']) <=0 ){
}else{
echo " info here";
}
This is what did it for me in .htaccess (it could be that you had a directive making all files load as MIME type text/html):
In .htaccess
AddType text/css .css
Using inline styles:
<input type="text" style="text-align: right"/>
or, put it in a style sheet, like so:
<style>
.rightJustified {
text-align: right;
}
</style>
and reference the class:
<input type="text" class="rightJustified"/>
Starting
start-dfs.sh (starts the namenode and the datanode)
start-mapred.sh (starts the jobtracker and the tasktracker)
Stopping
stop-dfs.sh
stop-mapred.sh
After spending a good amount of time on this issue I found whenever I followed suggestions of using IIS to make a self signed certificate, I found that the Issued To and Issued by was not correct. SelfSSL.exe was the key to solving this problem. The following website not only provided a step by step approach to making self signed certificates, but also solved the Issued To and Issued by problem. Here is the best solution I found for making self signed certificates. If you'd prefer to see the same tutorial in video form click here.
A sample use of SelfSSL would look something like the following:
SelfSSL /N:CN=YourWebsite.com /V:1000 /S:2
SelfSSL /? will provide a list of parameters with explanation.
Try str.replace()
:
string = "it is icy"
print string.replace("i", "")
valueLink/checkedLink
are deprecated from core React, because it is confusing some users. This answer won't work if you use a recent version of React. But if you like it, you can easily emulate it by creating your own Input
component
What you want to achieve can be much more easily achieved using the 2-way data binding helpers of React.
var Hello = React.createClass({
mixins: [React.addons.LinkedStateMixin],
getInitialState: function() {
return {input1: 0, input2: 0};
},
render: function() {
var total = this.state.input1 + this.state.input2;
return (
<div>{total}<br/>
<input type="text" valueLink={this.linkState('input1')} />;
<input type="text" valueLink={this.linkState('input2')} />;
</div>
);
}
});
React.renderComponent(<Hello />, document.getElementById('content'));
Easy right?
http://facebook.github.io/react/docs/two-way-binding-helpers.html
You can even implement your own mixin
You might want to consider using console.log
with the built-in "arguments" object:
console.log(arguments); // would have shown you [0] null, [1] yourResult
This will always output all of your arguments, no matter how many arguments you have.
For example, if you create two instances of a class e.g. myClass
:
var inst1 = myClass()
var inst2 = myClass()
you can compare those instances,
if inst1 === inst2
cited:
which you use to test whether two object references both refer to the same object instance.
Excerpt From: Apple Inc. “The Swift Programming Language.” iBooks. https://itun.es/sk/jEUH0.l
You can use like this
EditText dollar=(EditText) findViewById(R.id.money);
int rupees=Integer.parseInt( dollar.getText().toString());
Usually that will give you the top view, but there's no guarantee that it's visible to the user. It could be off the screen, have an alpha of 0.0, or could be have size of 0x0 for example.
It could also be that the keyWindow has no subviews, so you should probably test for that first. This would be unusual, but it's not impossible.
UIWindow is a subclass of UIView, so if you want to make sure your notification is visible to the user, you can add it directly to the keyWindow using addSubview:
and it will instantly be the top most view. I'm not sure if this is what you're looking to do though. (Based on your question, it looks like you already know this.)
To execute more Maven builds from one script you shall use the Windows call function in the following way:
call mvn install:install-file -DgroupId=gdata -DartifactId=base -Dversion=1.0 -Dfile=gdata-base-1.0.jar -Dpackaging=jar -DgeneratePom=true
call mvn install:install-file -DgroupId=gdata -DartifactId=blogger -Dversion=2.0 -Dfile=gdata-blogger-2.0.jar -Dpackaging=jar -DgeneratePom=true
call mvn install:install-file -DgroupId=gdata -DartifactId=blogger-meta -Dversion=2.0 -Dfile=gdata-blogger-meta-2.0.jar -Dpackaging=jar -DgeneratePom=true
Default c++ mechanism for file IO is called streams.
Streams can be of three flavors: input, output and inputoutput.
Input streams act like sources of data. To read data from an input stream you use >>
operator:
istream >> my_variable; //This code will read a value from stream into your variable.
Operator >>
acts different for different types. If in the example above my_variable
was an int, then a number will be read from the strem, if my_variable
was a string, then a word would be read, etc.
You can read more then one value from the stream by writing istream >> a >> b >> c;
where a, b and c would be your variables.
Output streams act like sink to which you can write your data. To write your data to a stream, use <<
operator.
ostream << my_variable; //This code will write a value from your variable into stream.
As with input streams, you can write several values to the stream by writing something like this:
ostream << a << b << c;
Obviously inputoutput streams can act as both.
In your code sample you use cout
and cin
stream objects.
cout
stands for console-output and cin for console-input
. Those are predefined streams for interacting with default console.
To interact with files, you need to use ifstream
and ofstream
types.
Similar to cin
and cout
, ifstream
stands for input-file-stream
and ofstream
stands for output-file-stream
.
Your code might look like this:
#include <iostream>
#include <fstream>
using namespace std;
int start()
{
cout << "Welcome...";
// do fancy stuff
return 0;
}
int main ()
{
string usreq, usr, yn, usrenter;
cout << "Is this your first time using TEST" << endl;
cin >> yn;
if (yn == "y")
{
ifstream iusrfile;
ofstream ousrfile;
iusrfile.open("usrfile.txt");
iusrfile >> usr;
cout << iusrfile; // I'm not sure what are you trying to do here, perhaps print iusrfile contents?
iusrfile.close();
cout << "Please type your Username. \n";
cin >> usrenter;
if (usrenter == usr)
{
start ();
}
}
else
{
cout << "THAT IS NOT A REGISTERED USERNAME.";
}
return 0;
}
For further reading you might want to look at c++ I/O reference
Calling m.check(side), meaning you are running actual code, but you can't run code outside main() - you can only define variables. In C++, code can only appear inside function bodies or in variable initializes.
Here's generally how to select multiple columns from a subquery:
SELECT
A.SalesOrderID,
A.OrderDate,
SQ.Max_Foo,
SQ.Max_Foo2
FROM
A
LEFT OUTER JOIN
(
SELECT
B.SalesOrderID,
MAX(B.Foo) AS Max_Foo,
MAX(B.Foo2) AS Max_Foo2
FROM
B
GROUP BY
B.SalesOrderID
) AS SQ ON SQ.SalesOrderID = A.SalesOrderID
If what you're ultimately trying to do is get the values from the row with the highest value for Foo (rather than the max of Foo and the max of Foo2 - which is NOT the same thing) then the following will usually work better than a subquery:
SELECT
A.SalesOrderID,
A.OrderDate,
B1.Foo,
B1.Foo2
FROM
A
LEFT OUTER JOIN B AS B1 ON
B1.SalesOrderID = A.SalesOrderID
LEFT OUTER JOIN B AS B2 ON
B2.SalesOrderID = A.SalesOrderID AND
B2.Foo > B1.Foo
WHERE
B2.SalesOrderID IS NULL
You're basically saying, give me the row from B where I can't find any other row from B with the same SalesOrderID and a greater Foo.
With ES6, you can now use the spread operator to create a new array with your new elements inserted before the original elements.
// Prepend a single item._x000D_
const a = [1, 2, 3];_x000D_
console.log([0, ...a]);
_x000D_
// Prepend an array._x000D_
const a = [2, 3];_x000D_
const b = [0, 1];_x000D_
console.log([...b, ...a]);
_x000D_
I intended this answer to present an alternative syntax that I think is more memorable and concise. It should be noted that according to some benchmarks (see this other answer), this syntax is significantly slower. This is probably not going to matter unless you are doing many of these operations in a loop.
Because it's an integer. You need to declare them as floating point numbers or decimals, or cast to such in the calculation.
Note if you are using https.request
do not directly use the body from res.on('data',..
. This will fail if you have a large data coming in chunks. So you need to concatenate all the data and then process the response in res.on('end'
. Example -
var options = {
hostname: "www.google.com",
port: 443,
path: "/upload",
method: 'POST',
headers: {
'Content-Type': 'application/json',
'Content-Length': Buffer.byteLength(post_data)
}
};
//change to http for local testing
var req = https.request(options, function (res) {
res.setEncoding('utf8');
var body = '';
res.on('data', function (chunk) {
body = body + chunk;
});
res.on('end',function(){
console.log("Body :" + body);
if (res.statusCode != 200) {
callback("Api call failed with response code " + res.statusCode);
} else {
callback(null);
}
});
});
req.on('error', function (e) {
console.log("Error : " + e.message);
callback(e);
});
// write data to request body
req.write(post_data);
req.end();
@robert-hurst has a cleaner approach.
However, this solution may also be used, in places when you actually want to have a copy of Data Url after copying. For example, when you are building a website that uses lots of image/canvas operations.
// select canvas elements
var sourceCanvas = document.getElementById("some-unique-id");
var destCanvas = document.getElementsByClassName("some-class-selector")[0];
//copy canvas by DataUrl
var sourceImageData = sourceCanvas.toDataURL("image/png");
var destCanvasContext = destCanvas.getContext('2d');
var destinationImage = new Image;
destinationImage.onload = function(){
destCanvasContext.drawImage(destinationImage,0,0);
};
destinationImage.src = sourceImageData;
when iserting into t-sql
this fails:
select CONVERT(datetime,'2019-09-13 09:04:35.823312',21)
this works:
select CONVERT(datetime,'2019-09-13 09:04:35.823',21)
easy way:
regexp = re.compile(r'\.(\d{6})')
def to_splunk_iso(dt):
"""Converts the datetime object to Splunk isoformat string."""
# 6-digits string.
microseconds = regexp.search(dt).group(1)
return regexp.sub('.%d' % round(float(microseconds) / 1000), dt)
First, in your database, create the following two objects:
CREATE TYPE dbo.IDList
AS TABLE
(
ID INT
);
GO
CREATE PROCEDURE dbo.DoSomethingWithEmployees
@List AS dbo.IDList READONLY
AS
BEGIN
SET NOCOUNT ON;
SELECT ID FROM @List;
END
GO
Now in your C# code:
// Obtain your list of ids to send, this is just an example call to a helper utility function
int[] employeeIds = GetEmployeeIds();
DataTable tvp = new DataTable();
tvp.Columns.Add(new DataColumn("ID", typeof(int)));
// populate DataTable from your List here
foreach(var id in employeeIds)
tvp.Rows.Add(id);
using (conn)
{
SqlCommand cmd = new SqlCommand("dbo.DoSomethingWithEmployees", conn);
cmd.CommandType = CommandType.StoredProcedure;
SqlParameter tvparam = cmd.Parameters.AddWithValue("@List", tvp);
// these next lines are important to map the C# DataTable object to the correct SQL User Defined Type
tvparam.SqlDbType = SqlDbType.Structured;
tvparam.TypeName = "dbo.IDList";
// execute query, consume results, etc. here
}
If you are using SQL Server 2005, I would still recommend a split function over XML. First, create a function:
CREATE FUNCTION dbo.SplitInts
(
@List VARCHAR(MAX),
@Delimiter VARCHAR(255)
)
RETURNS TABLE
AS
RETURN ( SELECT Item = CONVERT(INT, Item) FROM
( SELECT Item = x.i.value('(./text())[1]', 'varchar(max)')
FROM ( SELECT [XML] = CONVERT(XML, '<i>'
+ REPLACE(@List, @Delimiter, '</i><i>') + '</i>').query('.')
) AS a CROSS APPLY [XML].nodes('i') AS x(i) ) AS y
WHERE Item IS NOT NULL
);
GO
Now your stored procedure can just be:
CREATE PROCEDURE dbo.DoSomethingWithEmployees
@List VARCHAR(MAX)
AS
BEGIN
SET NOCOUNT ON;
SELECT EmployeeID = Item FROM dbo.SplitInts(@List, ',');
END
GO
And in your C# code you just have to pass the list as '1,2,3,12'
...
I find the method of passing through table valued parameters simplifies the maintainability of a solution that uses it and often has increased performance compared to other implementations including XML and string splitting.
The inputs are clearly defined (no one has to guess if the delimiter is a comma or a semi-colon) and we do not have dependencies on other processing functions that are not obvious without inspecting the code for the stored procedure.
Compared to solutions involving user defined XML schema instead of UDTs, this involves a similar number of steps but in my experience is far simpler code to manage, maintain and read.
In many solutions you may only need one or a few of these UDTs (User defined Types) that you re-use for many stored procedures. As with this example, the common requirement is to pass through a list of ID pointers, the function name describes what context those Ids should represent, the type name should be generic.
Following @Aravind's answer with more details
@RequestMapping("/myPath.htm")
public ModelAndView add(HttpServletRequest request, HttpServletResponse response) throws Exception{
myServiceMethodSettingCookie(request, response); //Do service call passing the response
return new ModelAndView("CustomerAddView");
}
// service method
void myServiceMethodSettingCookie(HttpServletRequest request, HttpServletResponse response){
final String cookieName = "my_cool_cookie";
final String cookieValue = "my cool value here !"; // you could assign it some encoded value
final Boolean useSecureCookie = false;
final int expiryTime = 60 * 60 * 24; // 24h in seconds
final String cookiePath = "/";
Cookie cookie = new Cookie(cookieName, cookieValue);
cookie.setSecure(useSecureCookie); // determines whether the cookie should only be sent using a secure protocol, such as HTTPS or SSL
cookie.setMaxAge(expiryTime); // A negative value means that the cookie is not stored persistently and will be deleted when the Web browser exits. A zero value causes the cookie to be deleted.
cookie.setPath(cookiePath); // The cookie is visible to all the pages in the directory you specify, and all the pages in that directory's subdirectories
response.addCookie(cookie);
}
Related docs:
http://docs.oracle.com/javaee/7/api/javax/servlet/http/Cookie.html
http://docs.spring.io/spring-security/site/docs/3.0.x/reference/springsecurity.html
The following takes athspk's answer and makes it into one that loops continually until the user types "exit". I've also written a followup answer where I've taken this code and made it testable.
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
public class LoopingConsoleInputExample {
public static final String EXIT_COMMAND = "exit";
public static void main(final String[] args) throws IOException {
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
System.out.println("Enter some text, or '" + EXIT_COMMAND + "' to quit");
while (true) {
System.out.print("> ");
String input = br.readLine();
System.out.println(input);
if (input.length() == EXIT_COMMAND.length() && input.toLowerCase().equals(EXIT_COMMAND)) {
System.out.println("Exiting.");
return;
}
System.out.println("...response goes here...");
}
}
}
Example output:
Enter some text, or 'exit' to quit
> one
one
...response goes here...
> two
two
...response goes here...
> three
three
...response goes here...
> exit
exit
Exiting.
Add this line at the top:
"xmlns:app="http://schemas.android.com/apk/res-auto"
and then use:
app:showasaction="ifroom"
I had this problem i.e. works fine when pasted into browser but 505s when done through java. It was simply the spaces that needed to be escaped/encoded.
At your model add this:
public function scopeRandomize($query, $limit = 3, $exclude = [])
{
$query = $query->whereRaw('RAND()<(SELECT ((?/COUNT(*))*10) FROM `products`)', [$limit])->orderByRaw('RAND()')->limit($limit);
if (!empty($exclude)) {
$query = $query->whereNotIn('id', $exclude);
}
return $query;
}
then at route/controller
$data = YourModel::randomize(8)->get();
Just rename the current ErrorLog to any other name like Errorlog _Old and change any old Log file to Error log file
try to start the SQL server services.. That's it. it will work..
Sql server error log file got corrupted. that is why it gives the problem even when you have all permissions.. when you delete it. new file will be generated.
You didn't mention the fancy indexing capabilities of dataframes, e.g.:
>>> df = pd.DataFrame({"class":[1,1,1,2,2], "value":[1,2,3,4,5]})
>>> df[df["class"]==1].sum()
class 3
value 6
dtype: int64
>>> df[df["class"]==1].sum()["value"]
6
>>> df[df["class"]==1].count()["value"]
3
You could replace df["class"]==1
by another condition.
Using INSTR:
SELECT *
FROM TABLE a
JOIN TABLE b ON INSTR(b.column, a.column) > 0
Using LIKE:
SELECT *
FROM TABLE a
JOIN TABLE b ON b.column LIKE '%'+ a.column +'%'
Using LIKE, with CONCAT:
SELECT *
FROM TABLE a
JOIN TABLE b ON b.column LIKE CONCAT('%', a.column ,'%')
Mind that in all options, you'll probably want to drive the column values to uppercase BEFORE comparing to ensure you are getting matches without concern for case sensitivity:
SELECT *
FROM (SELECT UPPER(a.column) 'ua'
TABLE a) a
JOIN (SELECT UPPER(b.column) 'ub'
TABLE b) b ON INSTR(b.ub, a.ua) > 0
The most efficient will depend ultimately on the EXPLAIN plan output.
JOIN
clauses are identical to writing WHERE
clauses. The JOIN
syntax is also referred to as ANSI JOINs because they were standardized. Non-ANSI JOINs look like:
SELECT *
FROM TABLE a,
TABLE b
WHERE INSTR(b.column, a.column) > 0
I'm not going to bother with a Non-ANSI LEFT JOIN example. The benefit of the ANSI JOIN syntax is that it separates what is joining tables together from what is actually happening in the WHERE
clause.
I think this happen because the name of your class is the same name of another class in the JDK . Help eclipse to determine which one you are trying to run by selecting the package your class is in . Go to run configuration select the project and the main class.
When you press the search button to select the main class, you will find options that have the same name but different package, select your class.
You can use the callback result of showSoftInput() and hideSoftInput() to check for the status of the keyboard. Full details and example code at
https://rogerkeays.com/how-to-check-if-the-software-keyboard-is-shown-in-android
According to Froyo source code, the Intent.EXTRA_INSTALLER_PACKAGE_NAME extra key is queried for the installer package name in the PackageInstallerActivity.
The background color property is ignored on a UINavigationBar
, so if you want to adjust the look and feel you either have to use the tintColor
or call some of the other methods listed under "Customizing the Bar Appearance" of the UINavigationBar class reference (like setBackgroundImage:forBarMetrics:
).
Be aware that the tintColor
property works differently in iOS 7, so if you want a consistent look between iOS 7 and prior version using a background image might be your best bet. It's also worth mentioning that you can't configure the background image in the Storyboard, you'll have to create an IBOutlet
to your UINavigationBar
and change it in viewDidLoad
or some other appropriate place.
For those who don't want to use ref and reset the state with OnChange
event, you can just use simple OnSubmit handle and loop through the FormData
object. This example is using React Hooks:
const LoginPage = () =>{
const handleSubmit = (event) => {
const formData = new FormData(event.target);
event.preventDefault();
for (let [key, value] of formData.entries()) {
console.log(key, value);
}
}
return (
<div>
<form onSubmit={
handleSubmit
}
>
<input type="text" name="username" placeholder="Email" />
<input type="password" name="password"
placeholder="Password" />
<button type="submit">Login</button>
</form>
</div>)
}
This above does not work because sometimes
$(this).attr('checked') == undefined
adjust your code with
if(!$(this).attr('checked') || $(this).attr('checked') == false){
All answers on this page are really great for a complex object. But for those containing builtin iterable types as attributes, like str
, list
, set
or dict
, or any implementation of collections.Iterable
, you can omit certain things in your class.
class Test(object):
def __init__(self, string):
self.string = string
def __iter__(self):
# since your string is already iterable
return (ch for ch in self.string)
# or simply
return self.string.__iter__()
# also
return iter(self.string)
It can be used like:
for x in Test("abcde"):
print(x)
# prints
# a
# b
# c
# d
# e
Sometimes it may happen that there are multiple schema created in a database.
So to be specific schema we need to target, so this will help to do it.
SELECT count(*) into @colCnt FROM information_schema.columns WHERE table_name = 'mytable' AND column_name = 'mycolumn' and table_schema = DATABASE();
IF @colCnt = 0 THEN
ALTER TABLE `mytable` ADD COLUMN `mycolumn` VARCHAR(20) DEFAULT NULL;
END IF;
You're using the declarative style of specifying your pipeline, so you must not use try/catch blocks (which are for Scripted Pipelines), but the post section. See: https://jenkins.io/doc/book/pipeline/syntax/#post-conditions
Because HTTP is stateless, in order to associate a request to any other request, you need a way to store user data between HTTP requests.
Cookies or URL parameters ( for ex. like http://example.com/myPage?asd=lol&boo=no ) are both suitable ways to transport data between 2 or more request. However they are not good in case you don't want that data to be readable/editable on client side.
The solution is to store that data server side, give it an "id", and let the client only know (and pass back at every http request) that id. There you go, sessions implemented. Or you can use the client as a convenient remote storage, but you would encrypt the data and keep the secret server-side.
Of course there are other aspects to consider, like you don't want people to hijack other's sessions, you want sessions to not last forever but to expire, and so on.
In your specific example, the user id (could be username or another unique ID in your user database) is stored in the session data, server-side, after successful identification. Then for every HTTP request you get from the client, the session id (given by the client) will point you to the correct session data (stored by the server) that contains the authenticated user id - that way your code will know what user it is talking to.
Firstly I embed the console application solution into the windows service solution and reference it.
Then I make the console application Program class public
/// <summary>
/// Hybrid service/console application
/// </summary>
public class Program
{
}
I then create two functions within the console application
/// <summary>
/// Used to start as a service
/// </summary>
public void Start()
{
Main();
}
/// <summary>
/// Used to stop the service
/// </summary>
public void Stop()
{
if (Application.MessageLoop)
Application.Exit(); //windows app
else
Environment.Exit(1); //console app
}
Then within the windows service itself I instantiate the Program and call the Start and Stop functions added within the OnStart and OnStop. See below
class WinService : ServiceBase
{
readonly Program _application = new Program();
/// <summary>
/// The main entry point for the application.
/// </summary>
static void Main()
{
ServiceBase[] servicesToRun = { new WinService() };
Run(servicesToRun);
}
/// <summary>
/// Set things in motion so your service can do its work.
/// </summary>
protected override void OnStart(string[] args)
{
Thread thread = new Thread(() => _application.Start());
thread.Start();
}
/// <summary>
/// Stop this service.
/// </summary>
protected override void OnStop()
{
Thread thread = new Thread(() => _application.Stop());
thread.Start();
}
}
This approach can also be used for a windows application / windows service hybrid
Wrap time
and the command you are timing in a set of brackets.
For example, the following times ls
and writes the result of ls
and the results of the timing into outfile
:
$ (time ls) > outfile 2>&1
Or, if you'd like to separate the output of the command from the captured output from time
:
$ (time ls) > ls_results 2> time_results
I had this problem recently and the problem was that my web server was not configured to serve woff files. For IIS 7, you can select your site, then select the MIME Types icon. If .woff is not in the list, you need to add it. The correct values are
File name extension: .woff
MIME type: application/font-woff
Bash can get the last part of a path without having to call the external basename
:
subdir="/path/to/whatever/${1##*/}"
If your text is in a Bash variable, then Parameter Substitution ${var//\\//}
can replace substrings:
$ p='C:\foo\bar.xml'
$ printf '%s\n' "$p"
C:\foo\bar.xml
$ printf '%s\n' "${p//\\//}"
C:/foo/bar.xml
This may be leaner and clearer that filtering through a command such as tr
or sed
.
Adding the following on the div surrounding the element in question fixed this for me.
-webkit-transform-style: preserve-3d;
The jagged edges were appearing around the video window in my case.
It looks like the object file was compiled on a 64-bit toolchain, and you're using a 32-bit toolchain. Have you tried recompiling the object file in 32-bit mode?
Old question. But since VB.NET
was the original requirement. Using the same values of the accepted answer:
listOfStrings.Any(Function(s) myString.Contains(s))
I found this on google, tested in Excel 2003 & it works for me:
=IF(COUNTIF(A1,"* *"),RIGHT(A1,LEN(A1)-LOOKUP(LEN(A1),FIND(" ",A1,ROW(INDEX($A:$A,1,1):INDEX($A:$A,LEN(A1),1))))),A1)
[edit] I don't have enough rep to comment, so this seems the best place...BradC's answer also doesn't work with trailing spaces or empty cells...
[2nd edit] actually, it doesn't work for single words either...
All the example I've seen aren't reusable for different "yes/no" type questions. I was looking for something that would allow me to specify a callback so I could call for any situation.
The following is working well for me:
$.extend({ confirm: function (title, message, yesText, yesCallback) {
$("<div></div>").dialog( {
buttons: [{
text: yesText,
click: function() {
yesCallback();
$( this ).remove();
}
},
{
text: "Cancel",
click: function() {
$( this ).remove();
}
}
],
close: function (event, ui) { $(this).remove(); },
resizable: false,
title: title,
modal: true
}).text(message).parent().addClass("alert");
}
});
I then call it like this:
var deleteOk = function() {
uploadFile.del(fileid, function() {alert("Deleted")})
};
$.confirm(
"CONFIRM", //title
"Delete " + filename + "?", //message
"Delete", //button text
deleteOk //"yes" callback
);
This is heavy tunning, but you can get a 3gb heap.
Although this is old post... i had similar situation that gave me headache. Finally, i figured that i was including sub pages in index.php with "@include ..." "@" hides all errors even if display_errors is ON
Many other answers only do formatting. This approach will return value instead of only print format.
double number1 = 10.123456;
double number2 = (int)(Math.round(number1 * 100))/100.0;
System.out.println(number2);
Try the following way:
<input type="submit" value="Search" class="search-btn" />
<a href="javascript:;" onclick="$('.search-btn').click();">Go</a>
In my case, Tile Image loaded from remote url and tilesloaded
event was triggered before render the image.
I solved with following dirty way.
var tileCount = 0;
var options = {
getTileUrl: function(coord, zoom) {
tileCount++;
return "http://posnic.com/tiles/?param"+coord;
},
tileSize: new google.maps.Size(256, 256),
opacity: 0.5,
isPng: true
};
var MT = new google.maps.ImageMapType(options);
map.overlayMapTypes.setAt(0, MT);
google.maps.event.addListenerOnce(map, 'tilesloaded', function(){
var checkExist = setInterval(function() {
if ($('#map_canvas > div > div > div:nth-child(1) > div:nth-child(1) > div:nth-child(1) > div:nth-child(2) > div > div').length === tileCount) {
callyourmethod();
clearInterval(checkExist);
}
}, 100); // check every 100ms
});
select name, price
from (
select name, price,
row_number() over (order by price) r
from items
)
where r between 1 and 5;
Implementing the two directives already worked for me from within "C:\Windows\SysWOW64"
regsvr32 MSCOMCTL.OCX
regtlib msdatsrc.tlb
It's worth noting that the DOS box should be in Administrator mode. Prior to this, I kept having errors in the vein "Class MSComctlLib.TreeView of control tvTreeView was not a loaded control class" and "Class MSComctlLib.ListView of control lvListView was not a loaded control class".
I am also using Visual Studio 6 on 64 bit Windows 7, with SP6 updates. I was driven here due to the same problem. In my case, I did not need to go through the registry.
This kind of thing is not easy. Here is a method that calls a static method:
public static Object callStaticMethod(
// class that contains the static method
final Class<?> clazz,
// method name
final String methodName,
// optional method parameters
final Object... parameters) throws Exception{
for(final Method method : clazz.getMethods()){
if(method.getName().equals(methodName)){
final Class<?>[] paramTypes = method.getParameterTypes();
if(parameters.length != paramTypes.length){
continue;
}
boolean compatible = true;
for(int i = 0; i < paramTypes.length; i++){
final Class<?> paramType = paramTypes[i];
final Object param = parameters[i];
if(param != null && !paramType.isInstance(param)){
compatible = false;
break;
}
}
if(compatible){
return method.invoke(/* static invocation */null,
parameters);
}
}
}
throw new NoSuchMethodException(methodName);
}
Update: Wait, I just saw the gwt tag on the question. You can't use reflection in GWT
Open Applicaction -> Accessories -> Terminal
Type commandline as below...
sudo apt-get install openjdk-7-jdk
Type commandline as below...
apt-cache search jdk
(Note: openjdk-7-jdk is symbolically used here. You can choose the JDK version as per your requirement.)
For "JAVA_HOME" (Environment Variable) type command as shown below, in "Terminal" using your installation path...
export JAVA_HOME=/usr/lib/jvm/java-7-openjdk
(Note: "/usr/lib/jvm/java-7-openjdk" is symbolically used here just for demostration. You should use your path as per your installation.)
For "PATH" (Environment Variable) type command as shown below, in "Terminal" using your installation path...
export PATH=$PATH:/usr/lib/jvm/java-7-openjdk/bin
(Note: "/usr/lib/jvm/java-7-openjdk" is symbolically used here just for demostration. You should use your path as per your installation.)
Check for "open jdk" installation, just type command in "Terminal" as shown below
javac -version
You have to add the below permission in Info.plist. More Referance
Camera :
Key : Privacy - Camera Usage Description
Value : $(PRODUCT_NAME) camera use
Photo :
Key : Privacy - Photo Library Usage Description
Value : $(PRODUCT_NAME) photo use
You can:
<input type="submit" ..>
, instead of that button.submit(..)
on it. Eg: form.submit()
. Attach this code to the button click event. This will serialise the form parameters and execute a GET or POST request as specified in the form's method attribute.There is no need to make a query string. Just put your values in an object and jQuery will take care of the rest for you.
var data = {
name: $("#form_name").val(),
email: $("#form_email").val(),
message: $("#msg_text").val()
};
$.ajax({
type: "POST",
url: "email.php",
data: data,
success: function(){
$('.success').fadeIn(1000);
}
});
Make sure that both projects have same target framework version here: right click on project -> properties -> application (tab) -> target framework
Also, make sure that the project "logger" (which you want to include in the main project) has the output type "Class Library" in: right click on project -> properties -> application (tab) -> output type
Finally, Rebuild the solution.
public static int convBool(boolean b)
{
int convBool = 0;
if(b) convBool = 1;
return convBool;
}
Then use :
convBool(aBool);
Try this:
MyContext Context = new MyContext();
Context.YourEntity.Add(obj);
Context.SaveChanges();
int ID = obj._ID;
In Java 11, you have repeat
:
String s = " ";
s = s.repeat(1);
(Although at the time of writing still subject to change)
Your if statement is setting the value. You want to compare it by doing this
if ($("#type").val() == "item1") {
...
}
daLizard is right though. You want an event handler. document.ready runs only once, when the page DOM is ready to be used.
Start by figuring out what your current working directory is for your running script.
Add this line at the beginning:
puts Dir.pwd
.
This will tell you in which current working directory ruby is running your script. You will most likely see it's not where you assume it is. Then make sure you're specifying pathnames properly for windows. See the docs here how to properly format pathnames for windows:
http://www.ruby-doc.org/core/classes/IO.html
Then either use Dir.chdir
to change the working directory to the place where text.txt is, or specify the absolute pathname to the file according to the instructions in the IO docs above. That SHOULD do it...
EDIT
Adding a 3rd solution which might be the most convenient one, if you're putting the text files among your script files:
Dir.chdir(File.dirname(__FILE__))
This will automatically change the current working directory to the same directory as the .rb
file that is running the script.
You can make a new file under [.git\refs\remotes\origin] with name "HEAD" and put content "ref: refs/remotes/origin/master" to it. This should solve your problem.
It seems that clone from an empty repos will lead to this. Maybe the empty repos do not have HEAD because no commit object exist.
You can use the
git log --remotes --branches --oneline --decorate
to see the difference between each repository, while the "problem" one do not have "origin/HEAD"
Edit: Give a way using command line
You can also use git command line to do this, they have the same result
git symbolic-ref refs/remotes/origin/HEAD refs/remotes/origin/master
POD is the official way to do multi line comments in Perl,
From faq.perl.org[perlfaq7]
The quick-and-dirty way to comment out more than one line of Perl is to surround those lines with Pod directives. You have to put these directives at the beginning of the line and somewhere where Perl expects a new statement (so not in the middle of statements like the # comments). You end the comment with
=cut
, ending the Pod section:
=pod
my $object = NotGonnaHappen->new();
ignored_sub();
$wont_be_assigned = 37;
=cut
The quick-and-dirty method only works well when you don't plan to leave the commented code in the source. If a Pod parser comes along, your multiline comment is going to show up in the Pod translation. A better way hides it from Pod parsers as well.
The
=begin
directive can mark a section for a particular purpose. If the Pod parser doesn't want to handle it, it just ignores it. Label the comments withcomment
. End the comment using=end
with the same label. You still need the=cut
to go back to Perl code from the Pod comment:
=begin comment
my $object = NotGonnaHappen->new();
ignored_sub();
$wont_be_assigned = 37;
=end comment
=cut
Identifying the column is easy:
SELECT *
FROM ( SELECT id,
time
FROM dbo.a
UNION
SELECT id,
time
FROM dbo.b
)
GROUP BY id
But it doesn't solve the main problem of this query: what's to be done with the second column values upon grouping by the first? Since (peculiarly!) you're using UNION
rather than UNION ALL
, you won't have entirely duplicated rows between the two subtables in the union, but you may still very well have several values of time for one value of the id, and you give no hint of what you want to do - min, max, avg, sum, or what?! The SQL engine should give an error because of that (though some such as mysql just pick a random-ish value out of the several, I believe sql-server is better than that).
So, for example, change the first line to SELECT id, MAX(time)
or the like!
I encountered this error while executing
SELECT * FROM table;
I traced the error to cursor.py line 195.
if args is not None:
if isinstance(args, dict):
nargs = {}
for key, item in args.items():
if isinstance(key, unicode):
key = key.encode(db.encoding)
nargs[key] = db.literal(item)
args = nargs
else:
args = tuple(map(db.literal, args))
try:
query = query % args
except TypeError as m:
raise ProgrammingError(str(m))
Given that I am entering any extra parameters, I got rid of all of "if args ..." branch. Now it works.
Using reshape2
and dplyr
. Your data:
df <- read.table(text=
"tea coke beer water gender
14.55 26.50793651 22.53968254 40 1
24.92997199 24.50980392 26.05042017 24.50980393 2
23.03732304 30.63063063 25.41827542 20.91377091 1
225.51781276 24.6064623 24.85501243 50.80645161 1
24.53662842 26.03706973 25.24271845 24.18358341 2", header=TRUE)
Getting data into correct form:
library(reshape2)
library(dplyr)
df.melt <- melt(df, id="gender")
bar <- group_by(df.melt, variable, gender)%.%summarise(mean=mean(value))
Plotting:
library(ggplot2)
ggplot(bar, aes(x=variable, y=mean, fill=factor(gender)))+
geom_bar(position="dodge", stat="identity")
>>> a = ()
>>> type(a)
<type 'tuple'>
>>> a = []
>>> type(a)
<type 'list'>
>>> a = {}
>>> type(a)
<type 'dict'>
>>> a = ['Stem', 'constitute', 'Sedge', 'Eflux', 'Whim', 'Intrigue']
>>> a.sort()
>>> a
['Eflux', 'Intrigue', 'Sedge', 'Stem', 'Whim', 'constitute']
>>>
The idiom is to use the bitwise or-equal operator to set bits:
flags |= 0x04;
To clear a bit, the idiom is to use bitwise and with negation:
flags &= ~0x04;
Sometimes you have an offset that identifies your bit, and then the idiom is to use these combined with left-shift:
flags |= 1 << offset;
flags &= ~(1 << offset);
Or you can simply update without using join like this:
Update t1 set t1.Description = t2.Description from @tbl2 t2,tbl1 t1
where t1.ID= t2.ID
Here is a simple snippet that read's in a json
text file from a dictionary. Note that your json file must follow the json standard, so it has to have "
double quotes rather then '
single quotes.
Your JSON dump.txt File:
{"test":"1", "test2":123}
Python Script:
import json
with open('/your/path/to/a/dict/dump.txt') as handle:
dictdump = json.loads(handle.read())
If you're using Python 2.5, this won't work, but for people using 2.6 or 2.7, try
from __future__ import print_function
print("abcd", end='')
print("efg")
results in
abcdefg
For those using 3.x, this is already built-in.
If you are using this path to access parts of the projects which are not code (for example an upload directory, or a SQLite database) then it might be better to turn the path into a parameter, like this:
parameters:
database_path: '%kernel.root_dir%/../var/sqlite3.db'
This parameter can be injected everywhere you need it, so you don't have to mess around with paths in your code any more. Also, the parameter can be overridden at deployment time. Finally, every maintaining programmer will have a better idea what you are using it for.
Update: Fixed kernel.root_dir constant usage.
I wouldnt use this attribute as most browsers ignore it as CMS points out.
By all means use client side validation but only in conjunction with server side. Any client side validation can be got round.
Slightly off topic but some people check the content type to validate the uploaded file. You need to be careful about this as an attacker can easily change it and upload a php file for example. See the example at: http://www.scanit.be/uploads/php-file-upload.pdf
Amazon's CloudFront content delivery network can now be configured to pass this information through as a header. Given Amazon's size (they're big and stable, not going anywhere) and this is configuration over code (no third-party API to learn or code to maintain), all around believe this to be the best option.
If you do not use AWS CloudFront, I'd look into seeing if your CDN has a similar header option that can be turned on. Usually the large providers are quick to push for feature parity. And if you are not using a CDN, you could put CloudFront in front of your infrastructure and simply set the origin to resolve to whatever you are currently using.
Additionally, it also makes sense to resolve this at the CDN level. Your CDN is already having to figure out geo location to route the user to the nearest content node, might as well pass this information along and not figure it out twice through a third party API (this becomes chokepoint for your app, waiting for a geo location lookup to resolve). No need to do this work twice (and the second time, arguably less resilient [e.g., 3rd party geo lookup]).
https://aws.amazon.com/blogs/aws/enhanced-cloudfront-customization/
Geo-Targeting – CloudFront will detect the user’s country of origin and pass along the county code to you in the
CloudFront-Viewer-Country
header. You can use this information to customize your responses without having to use URLs that are specific to each country.
Angular4
Instead of
this.renderer.invokeElementMethod(
this.fileInput.nativeElement, 'dispatchEvent', [event]);
use
this.fileInput.nativeElement.dispatchEvent(event);
because invokeElementMethod
won't be part of the renderer anymore.
Angular2
Use ViewChild with a template variable to get a reference to the file input, then use the Renderer to invoke dispatchEvent
to fire the event:
import { Component, Renderer, ElementRef, ViewChild } from '@angular/core';
@Component({
...
template: `
...
<input #fileInput type="file" id="imgFile" (click)="onChange($event)" >
...`
})
class MyComponent {
@ViewChild('fileInput') fileInput:ElementRef;
constructor(private renderer:Renderer) {}
showImageBrowseDlg() {
// from http://stackoverflow.com/a/32010791/217408
let event = new MouseEvent('click', {bubbles: true});
this.renderer.invokeElementMethod(
this.fileInput.nativeElement, 'dispatchEvent', [event]);
}
}
Update
Since direct DOM access isn't discouraged anymore by the Angular team this simpler code can be used as well
this.fileInput.nativeElement.click()
See also https://developer.mozilla.org/en-US/docs/Web/API/EventTarget/dispatchEvent
<table id="myData">
</table>
<script type="text/javascript">
$('#search').click(function() {
alert("submit handler has fired");
$.ajax({
type: 'POST',
url: 'cityResults.htm',
data: $('#cityDetails').serialize(),
success: function(data){
$.each(data, function( index, value ) {
var row = $("<tr><td>" + value.city + "</td><td>" + value.cStatus + "</td></tr>");
$("#myData").append(row);
});
},
error: function(jqXHR, textStatus, errorThrown){
alert('error: ' + textStatus + ': ' + errorThrown);
}
});
return false;//suppress natural form submission
});
</script>
loop through the data and append it to a table like the code above.
To do that, you must remove all '
charachters in your string or use an escape character. Like:
<?php
echo '<?php
echo \'hello world\';
?>';
?>
In C, the compiler can generally optimize them to be the same if the result is unused.
However, in C++ if using other types that provide their own ++ operators, the prefix version is likely to be faster than the postfix version. So, if you don't need the postfix semantics, it is better to use the prefix operator.
Kyle's solution worked perfectly fine for me so I made my research in order to avoid any Js and CSS, but just sticking with HTML.
Adding a value of selected
to the item we want to appear as a header forces it to show in the first place as a placeholder.
Something like:
<option selected disabled>Choose here</option>
The complete markup should be along these lines:
<select>
<option selected disabled>Choose here</option>
<option value="1">One</option>
<option value="2">Two</option>
<option value="3">Three</option>
<option value="4">Four</option>
<option value="5">Five</option>
</select>
You can take a look at this fiddle, and here's the result:
If you do not want the sort of placeholder text to appear listed in the options once a user clicks on the select box just add the hidden
attribute like so:
<select>
<option selected disabled hidden>Choose here</option>
<option value="1">One</option>
<option value="2">Two</option>
<option value="3">Three</option>
<option value="4">Four</option>
<option value="5">Five</option>
</select>
Check the fiddle here and the screenshot below.
Here is the solution:
<select>
<option style="display:none;" selected>Select language</option>
<option>Option 1</option>
<option>Option 2</option>
</select>
Lets say your data is -
data = {'a': [ [1, 2] ], 'b': [ [3, 4] ],'c':[ [5,6]] }
You can use the data.items()
method to get the dictionary elements. Note, in django templates we do NOT put ()
. Also some users mentioned values[0]
does not work, if that is the case then try values.items
.
<table>
<tr>
<td>a</td>
<td>b</td>
<td>c</td>
</tr>
{% for key, values in data.items %}
<tr>
<td>{{key}}</td>
{% for v in values[0] %}
<td>{{v}}</td>
{% endfor %}
</tr>
{% endfor %}
</table>
Am pretty sure you can extend this logic to your specific dict.
To iterate over dict keys in a sorted order - First we sort in python then iterate & render in django template.
return render_to_response('some_page.html', {'data': sorted(data.items())})
In template file:
{% for key, value in data %}
<tr>
<td> Key: {{ key }} </td>
<td> Value: {{ value }} </td>
</tr>
{% endfor %}
I use something like:
mysql --defaults-extra-file=/path/to/config.cnf
or
mysqldump --defaults-extra-file=/path/to/config.cnf
Where config.cnf contains:
[client]
user = "whatever"
password = "whatever"
host = "whatever"
This allows you to have multiple config files - for different servers/roles/databases. Using ~/.my.cnf will only allow you to have one set of configuration (although it may be a useful set of defaults).
If you're on a Debian based distro, and running as root, you could skip the above and just use /etc/mysql/debian.cnf to get in ... :
mysql --defaults-extra-file=/etc/mysql/debian.cnf
$('#multiselect1').on('change', function(){
var selected = $(this).find("option:selected");
var arrSelected = [];
selected.each(function(){
arrSelected.push($(this).val());
});
});
Replacing localhost with 10.0.2.2 is correct, but you can alsor replace localhost with your physical machine's ip(it is better for debug purposes). Ofc, if ip is provided by dhcp you would have to change it each time...
Good luck!
You can execute a batch instruction, or any other application using
Runtime.getRuntime().exec(cmd);
Also yo can wait for executing and getting the return code (to check if its executed correctly) with this code:
Process p = Runtime.getRuntime().exec(cmd);
p.waitFor();
int exitVal = p.exitValue();
You have a full explanation of different types of calls here http://www.rgagnon.com/javadetails/java-0014.html
I think you have to use ::-wekbit-scrollbar
for all the scrollbars, and you can use:
<style>
.mydiv {
height:100px;
overflow:auto;
}
/* width */
.mydiv::-webkit-scrollbar {
width: 20px;
}
/* Track */
.mydiv::-webkit-scrollbar-track {
box-shadow: inset 0 0 5px grey;
border-radius: 10px;
}
/* Handle */
.mydiv::-webkit-scrollbar-thumb {
background: red;
border-radius: 10px;
}
/* Handle on hover */
.mydiv::-webkit-scrollbar-thumb:hover {
background: #b30000;
}
</style>
<body>
<div class="mydiv"> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> <br/> </div>
</body>
method 1 <input type="text" onclick="this.disabled=false;" disabled>
<hr>
method 2 <input type="text" onclick="this.removeAttribute('disabled');" disabled>
<hr>
method 3 <input type="text" onclick="this.removeAttribute('readonly');" readonly>
code of the previous answers don't seem to work in inline mode, but there is a workaround: method 3.
Use this:
In [105]: a
Out[105]:
array([[15, 30, 88, 31, 33],
[53, 38, 54, 47, 56],
[67, 2, 74, 10, 16],
[86, 33, 15, 51, 32],
[32, 47, 76, 15, 81]], dtype=int32)
In [106]: float32(a)
Out[106]:
array([[ 15., 30., 88., 31., 33.],
[ 53., 38., 54., 47., 56.],
[ 67., 2., 74., 10., 16.],
[ 86., 33., 15., 51., 32.],
[ 32., 47., 76., 15., 81.]], dtype=float32)
You can set the variable 'fileencodings' in your .vimrc.
This is a list of character encodings considered when starting to edit an existing file. When a file is read, Vim tries to use the first mentioned character encoding. If an error is detected, the next one in the list is tried. When an encoding is found that works, 'fileencoding' is set to it. If all fail, 'fileencoding' is set to an empty string, which means the value of 'encoding' is used.
See :help filencodings
If you often work with e.g. cp1252, you can add it there:
set fileencodings=ucs-bom,utf-8,cp1252,default,latin9
Enumeration(?):
Enumeration e = new Vector(set).elements();
while (e.hasMoreElements())
{
System.out.println(e.nextElement());
}
Another way (java.util.Collections.enumeration()):
for (Enumeration e1 = Collections.enumeration(set); e1.hasMoreElements();)
{
System.out.println(e1.nextElement());
}
Java 8:
set.forEach(element -> System.out.println(element));
or
set.stream().forEach((elem) -> {
System.out.println(elem);
});
When you execute a method (i.e. function assigned to an object), inside it you can use this
variable to refer to this object, for example:
var obj = {_x000D_
someProperty: true,_x000D_
someMethod: function() {_x000D_
console.log(this.someProperty);_x000D_
}_x000D_
};_x000D_
obj.someMethod(); // logs true
_x000D_
If you assign a method from one object to another, its this
variable refers to the new object, for example:
var obj = {_x000D_
someProperty: true,_x000D_
someMethod: function() {_x000D_
console.log(this.someProperty);_x000D_
}_x000D_
};_x000D_
_x000D_
var anotherObj = {_x000D_
someProperty: false,_x000D_
someMethod: obj.someMethod_x000D_
};_x000D_
_x000D_
anotherObj.someMethod(); // logs false
_x000D_
The same thing happens when you assign requestAnimationFrame
method of window
to another object. Native functions, such as this, has build-in protection from executing it in other context.
There is a Function.prototype.call()
function, which allows you to call a function in another context. You just have to pass it (the object which will be used as context) as a first parameter to this method. For example alert.call({})
gives TypeError: Illegal invocation
. However, alert.call(window)
works fine, because now alert
is executed in its original scope.
If you use .call()
with your object like that:
support.animationFrame.call(window, function() {});
it works fine, because requestAnimationFrame
is executed in scope of window
instead of your object.
However, using .call()
every time you want to call this method, isn't very elegant solution. Instead, you can use Function.prototype.bind()
. It has similar effect to .call()
, but instead of calling the function, it creates a new function which will always be called in specified context. For example:
window.someProperty = true;_x000D_
var obj = {_x000D_
someProperty: false,_x000D_
someMethod: function() {_x000D_
console.log(this.someProperty);_x000D_
}_x000D_
};_x000D_
_x000D_
var someMethodInWindowContext = obj.someMethod.bind(window);_x000D_
someMethodInWindowContext(); // logs true
_x000D_
The only downside of Function.prototype.bind()
is that it's a part of ECMAScript 5, which is not supported in IE <= 8. Fortunately, there is a polyfill on MDN.
As you probably already figured out, you can use .bind()
to always execute requestAnimationFrame
in context of window
. Your code could look like this:
var support = {
animationFrame: (window.requestAnimationFrame ||
window.mozRequestAnimationFrame ||
window.webkitRequestAnimationFrame ||
window.msRequestAnimationFrame ||
window.oRequestAnimationFrame).bind(window)
};
Then you can simply use support.animationFrame(function() {});
.
The simplest way to do this is by
df["DateColumn"] = (df["DateColumn"]).dt.days
Another mock serious answer for a silly question:
The real answer is, use an appropriate data structure. Human genealogy cannot fully be expressed using a pure tree with no cycles. You should use some sort of graph. Also, talk to an anthropologist before going any further with this, because there are plenty of other places similar errors could be made trying to model genealogy, even in the most simple case of "Western patriarchal monogamous marriage."
Even if we want to ignore locally taboo relationships as discussed here, there are plenty of perfectly legal and completely unexpected ways to introduce cycles into a family tree.
For example: http://en.wikipedia.org/wiki/Cousin_marriage
Basically, cousin marriage is not only common and expected, it is the reason humans have gone from thousands of small family groups to a worldwide population of 6 billion. It can't work any other way.
There really are very few universals when it comes to genealogy, family and lineage. Almost any strict assumption about norms suggesting who an aunt can be, or who can marry who, or how children are legitimized for the purpose of inheritance, can be upset by some exception somewhere in the world or history.
We can add java folder from
It works fine.
or just use for date strings 2015-05-20 or 2015.05.20
date.split(/\.|-/);
Here is the jsFiddle
#backdrop{
border: 2px solid red;
width: 400px;
height: 200px;
position: absolute;
}
#curtain {
border: 1px solid blue;
width: 400px;
height: 200px;
position: absolute;
}
Use Z-index to move the one you want on top.
This is now possible in GitHub for any file. You need to translate your files for raw.github.com. For example, if your file is in your repository at:
https://github.com/<username>/<repo>/some_directory/file.rb
Using wget you can grab the raw file from:
https://raw.github.com/<username>/<repo>/<branch>/some_directory/file.rb
Rails Composer is a great example of this.
I know this is an old question but I did it like:
<asp:RadioButtonList runat="server" ID="myrbl" RepeatDirection="Horizontal" CssClass="rbl">
Use this as your class:
.rbl input[type="radio"]
{
margin-left: 10px;
margin-right: 1px;
}
This might help:
<input type="number" step="1" pattern="\d+" />
step
is for convenience (and could be set to another integer), but pattern
does some actual enforcing.
Note that since pattern
matches the whole expression, it wasn't necessary to express it as ^\d+$
.
Even with this outwardly tight regular expression, Chrome and Firefox's implementations, interestingly allow for e
here (presumably for scientific notation) as well as -
for negative numbers, and Chrome also allows for .
whereas Firefox is tighter in rejecting unless the .
is followed by 0's only. (Firefox marks the field as red upon the input losing focus whereas Chrome doesn't let you input disallowed values in the first place.)
Since, as observed by others, one should always validate on the server (or on the client too, if using the value locally on the client or wishing to prevent the user from a roundtrip to the server).
You can use Vim in Ex mode:
ex -sc 'a|BRAVO' -cx file
a
append text
x
save and close
A rewrite of the answer by Sarfraz would be something like this, I think:
<script>
document.getElementById('change').onclick = changeColor;
function changeColor() {
document.body.style.color = "purple";
return false;
}
</script>
You'd either have to put this script at the bottom of your page, right before the closing body tag, or put the handler assignment in a function called onload - or if you're using jQuery there's the very elegant $(document).ready(function() { ... } );
Note that when you assign event handlers this way, it takes the functionality out of your HTML. Also note you set it equal to the function name -- no (). If you did onclick = myFunc();
the function would actually execute when the handler is being set.
And I'm curious -- you knew enough to script changing the background color, but not the text color? strange:)
You just can put your query as a subquery:
SELECT avg(count)
FROM
(
SELECT COUNT (*) AS Count
FROM Table T
WHERE T.Update_time =
(SELECT MAX (B.Update_time )
FROM Table B
WHERE (B.Id = T.Id))
GROUP BY T.Grouping
) as counts
Edit: I think this should be the same:
SELECT count(*) / count(distinct T.Grouping)
FROM Table T
WHERE T.Update_time =
(SELECT MAX (B.Update_time)
FROM Table B
WHERE (B.Id = T.Id))
In order to write on a file by using a Python script, you would have to create a text file first. Example A file such as C:/logs/logs.txt should exist. Only then the following code works:
logfile=open(r"C:/logs/logs.txt",'w')
So summary.
- A text file should exist on the specified location
- Make sure you close the file before running the Python script.
You go around making your webpage, and keep on putting {{data bindings}} whenever you feel you would have dynamic data. Angular will then provide you a $scope handler, which you can populate (statically or through calls to the web server).
This is a good understanding of data-binding. I think you've got that down.
For simple DOM manipulation, which doesnot involve data manipulation (eg: color changes on mousehover, hiding/showing elements on click), jQuery or old-school js is sufficient and cleaner. This assumes that the model in angular's mvc is anything that reflects data on the page, and hence, css properties like color, display/hide, etc changes dont affect the model.
I can see your point here about "simple" DOM manipulation being cleaner, but only rarely and it would have to be really "simple". I think DOM manipulation is one the areas, just like data-binding, where Angular really shines. Understanding this will also help you see how Angular considers its views.
I'll start by comparing the Angular way with a vanilla js approach to DOM manipulation. Traditionally, we think of HTML as not "doing" anything and write it as such. So, inline js, like "onclick", etc are bad practice because they put the "doing" in the context of HTML, which doesn't "do". Angular flips that concept on its head. As you're writing your view, you think of HTML as being able to "do" lots of things. This capability is abstracted away in angular directives, but if they already exist or you have written them, you don't have to consider "how" it is done, you just use the power made available to you in this "augmented" HTML that angular allows you to use. This also means that ALL of your view logic is truly contained in the view, not in your javascript files. Again, the reasoning is that the directives written in your javascript files could be considered to be increasing the capability of HTML, so you let the DOM worry about manipulating itself (so to speak). I'll demonstrate with a simple example.
<div rotate-on-click="45"></div>
First, I'd just like to comment that if we've given our HTML this functionality via a custom Angular Directive, we're already done. That's a breath of fresh air. More on that in a moment.
function rotate(deg, elem) {
$(elem).css({
webkitTransform: 'rotate('+deg+'deg)',
mozTransform: 'rotate('+deg+'deg)',
msTransform: 'rotate('+deg+'deg)',
oTransform: 'rotate('+deg+'deg)',
transform: 'rotate('+deg+'deg)'
});
}
function addRotateOnClick($elems) {
$elems.each(function(i, elem) {
var deg = 0;
$(elem).click(function() {
deg+= parseInt($(this).attr('rotate-on-click'), 10);
rotate(deg, this);
});
});
}
addRotateOnClick($('[rotate-on-click]'));
app.directive('rotateOnClick', function() {
return {
restrict: 'A',
link: function(scope, element, attrs) {
var deg = 0;
element.bind('click', function() {
deg+= parseInt(attrs.rotateOnClick, 10);
element.css({
webkitTransform: 'rotate('+deg+'deg)',
mozTransform: 'rotate('+deg+'deg)',
msTransform: 'rotate('+deg+'deg)',
oTransform: 'rotate('+deg+'deg)',
transform: 'rotate('+deg+'deg)'
});
});
}
};
});
Pretty light, VERY clean and that's just a simple manipulation! In my opinion, the angular approach wins in all regards, especially how the functionality is abstracted away and the dom manipulation is declared in the DOM. The functionality is hooked onto the element via an html attribute, so there is no need to query the DOM via a selector, and we've got two nice closures - one closure for the directive factory where variables are shared across all usages of the directive, and one closure for each usage of the directive in the link
function (or compile
function).
Two-way data binding and directives for DOM manipulation are only the start of what makes Angular awesome. Angular promotes all code being modular, reusable, and easily testable and also includes a single-page app routing system. It is important to note that jQuery is a library of commonly needed convenience/cross-browser methods, but Angular is a full featured framework for creating single page apps. The angular script actually includes its own "lite" version of jQuery so that some of the most essential methods are available. Therefore, you could argue that using Angular IS using jQuery (lightly), but Angular provides much more "magic" to help you in the process of creating apps.
This is a great post for more related information: How do I “think in AngularJS” if I have a jQuery background?
The above points are aimed at the OP's specific concerns. I'll also give an overview of the other important differences. I suggest doing additional reading about each topic as well.
Angular is a framework, jQuery is a library. Frameworks have their place and libraries have their place. However, there is no question that a good framework has more power in writing an application than a library. That's exactly the point of a framework. You're welcome to write your code in plain JS, or you can add in a library of common functions, or you can add a framework to drastically reduce the code you need to accomplish most things. Therefore, a more appropriate question is:
Good frameworks can help architect your code so that it is modular (therefore reusable), DRY, readable, performant and secure. jQuery is not a framework, so it doesn't help in these regards. We've all seen the typical walls of jQuery spaghetti code. This isn't jQuery's fault - it's the fault of developers that don't know how to architect code. However, if the devs did know how to architect code, they would end up writing some kind of minimal "framework" to provide the foundation (achitecture, etc) I discussed a moment ago, or they would add something in. For example, you might add RequireJS to act as part of your framework for writing good code.
Here are some things that modern frameworks are providing:
Before I further discuss Angular, I'd like to point out that Angular isn't the only one of its kind. Durandal, for example, is a framework built on top of jQuery, Knockout, and RequireJS. Again, jQuery cannot, by itself, provide what Knockout, RequireJS, and the whole framework built on top them can. It's just not comparable.
If you need to destroy a planet and you have a Death Star, use the Death star.
Building on my previous points about what frameworks provide, I'd like to commend the way that Angular provides them and try to clarify why this is matter of factually superior to jQuery alone.
In my above example, it is just absolutely unavoidable that jQuery has to hook onto the DOM in order to provide functionality. That means that the view (html) is concerned about functionality (because it is labeled with some kind of identifier - like "image slider") and JavaScript is concerned about providing that functionality. Angular eliminates that concept via abstraction. Properly written code with Angular means that the view is able to declare its own behavior. If I want to display a clock:
<clock></clock>
Done.
Yes, we need to go to JavaScript to make that mean something, but we're doing this in the opposite way of the jQuery approach. Our Angular directive (which is in it's own little world) has "augumented" the html and the html hooks the functionality into itself.
Angular gives you a straightforward way to structure your code. View things belong in the view (html), augmented view functionality belongs in directives, other logic (like ajax calls) and functions belong in services, and the connection of services and logic to the view belongs in controllers. There are some other angular components as well that help deal with configuration and modification of services, etc. Any functionality you create is automatically available anywhere you need it via the Injector subsystem which takes care of Dependency Injection throughout the application. When writing an application (module), I break it up into other reusable modules, each with their own reusable components, and then include them in the bigger project. Once you solve a problem with Angular, you've automatically solved it in a way that is useful and structured for reuse in the future and easily included in the next project. A HUGE bonus to all of this is that your code will be much easier to test.
THANK GOODNESS. The aforementioned jQuery spaghetti code resulted from a dev that made something "work" and then moved on. You can write bad Angular code, but it's much more difficult to do so, because Angular will fight you about it. This means that you have to take advantage (at least somewhat) to the clean architecture it provides. In other words, it's harder to write bad code with Angular, but more convenient to write clean code.
Angular is far from perfect. The web development world is always growing and changing and there are new and better ways being put forth to solve problems. Facebook's React and Flux, for example, have some great advantages over Angular, but come with their own drawbacks. Nothing's perfect, but Angular has been and is still awesome for now. Just as jQuery once helped the web world move forward, so has Angular, and so will many to come.
Try uninstalling Python and then install it again, but this time make sure that the option Add Python to Path is marked as checked during the installation process.
I also had the similar requirement. Most of the examples on net are asking to create models and create forms which I did not wanna use. Here is my final code.
if request.method == 'POST':
file1 = request.FILES['file']
contentOfFile = file1.read()
if file1:
return render(request, 'blogapp/Statistics.html', {'file': file1, 'contentOfFile': contentOfFile})
And in HTML to upload I wrote:
{% block content %}
<h1>File content</h1>
<form action="{% url 'blogapp:uploadComplete'%}" method="post" enctype="multipart/form-data">
{% csrf_token %}
<input id="uploadbutton" type="file" value="Browse" name="file" accept="text/csv" />
<input type="submit" value="Upload" />
</form>
{% endblock %}
Following is the HTML which displays content of file:
{% block content %}
<h3>File uploaded successfully</h3>
{{file.name}}
</br>content = {{contentOfFile}}
{% endblock %}
You have ArrayList
all wrong,
add()
method in an arrayRather do this:
List<String> alist = new ArrayList<String>();
alist.add("apple");
alist.add("banana");
alist.add("orange");
String value = alist.get(1); //returns the 2nd item from list, in this case "banana"
Indexing is counted from 0
to N-1
where N
is size()
of list.
If you are experiencing the OP's problem where your cookies have been set using JavaScript - for example:
document.cookie = "my_cookie_name=my_cookie_value; expires=Thu, 11 Jun 2070 11:11:11 UTC; path=/";
you could instead use:
document.cookie = "my_cookie_name=my_cookie_value; expires=Thu, 11 Jun 2070 11:11:11 UTC; path=/; SameSite=None; Secure";
It worked for me. More info here.
<school>
<firstname>John</firstname>
<lastname>Smith</lastname>
</school>
<xs:element name="school">
<xs:complexType>
<xs:sequence>
<xs:element name="firstname" type="xs:string"/>
<xs:element name="lastname" type="xs:string"/>
</xs:sequence>
</xs:complexType>
</xs:element>
Here:
xs:element : Defines an element.
xs:sequence : Denotes child elements only appear in the order mentioned.
xs:complexType : Denotes it contains other elements.
xs:simpleType : Denotes they do not contain other elements.
type: string, decimal, integer, boolean, date, time,
With the help of extra attributes, we can perform multiple operations.
Performing any task on xsd is simpler than xml.
INSERT
INTO Employee
(emp_id, emp_name, emp_address, emp_state, emp_position, emp_manager)
SELECT '001', 'John Doe', '1 River Walk, Green Street', state_id, position_id, manager_id
FROM dual
JOIN state s
ON s.state_name = 'New York'
JOIN positions p
ON p.position_name = 'Sales Executive'
JOIN manager m
ON m.manager_name = 'Barry Green'
Note that but a single spelling mistake (or an extra space) will result in a non-match and nothing will be inserted.
This works at the moment (Oct. 2016), but I can't guarantee how long it will last:
https://www.facebook.com/sharer.php?caption=[caption]&description=[description]&u=[website]&picture=[image-url]
From man curl
:
-x, --proxy <[protocol://][user:password@]proxyhost[:port]>
Use the specified HTTP proxy.
If the port number is not specified, it is assumed at port 1080.
General way:
export http_proxy=http://your.proxy.server:port/
Then you can connect through proxy from (many) application.
And, as per comment below, for https:
export https_proxy=https://your.proxy.server:port/
From my understanding, router.navigate is used to navigate relatively to current path. For eg : If our current path is abc.com/user, we want to navigate to the url : abc.com/user/10 for this scenario we can use router.navigate .
router.navigateByUrl() is used for absolute path navigation.
ie,
If we need to navigate to entirely different route in that case we can use router.navigateByUrl
For example if we need to navigate from abc.com/user to abc.com/assets, in this case we can use router.navigateByUrl()
Syntax :
router.navigateByUrl(' ---- String ----');
router.navigate([], {relativeTo: route})
Do like jQuery does! (the essence)
function parseJSON(data) {
return window.JSON && window.JSON.parse ? window.JSON.parse( data ) : (new Function("return " + data))();
}
// testing
obj = parseJSON('{"name":"John"}');
alert(obj.name);
This way you don't need any external library and it still works on old browsers.
\w\-
is probably the best but here just another alternative
Use [:alnum:]
if(!preg_match("/[^[:alnum:]\-_]/",$str)) echo "valid";
kue is the only message queue you would ever need
To show both string.Split
and Regex
usage:
string input = "abc][rfd][5][,][.";
string[] parts1 = input.Split(new string[] { "][" }, StringSplitOptions.None);
string[] parts2 = Regex.Split(input, @"\]\[");
I used this way to make my project faster:
RichTextBox rcbCatalyst = new RichTextBox()
{
Lines = arrayString
};
string text = rcbCatalyst.Text;
rcbCatalyst.Dispose();
return text;
RichTextBox.Text will automatically convert your array to a multiline string!
You can use a very nice tool called Stetho
by adding this to build.gradle
file:
compile 'com.facebook.stetho:stetho:1.4.1'
And initialized it inside your Application
or Activity
onCreate()
method:
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Stetho.initializeWithDefaults(this);
setContentView(R.layout.activity_main);
}
Then you can view the db records in chrome in the address:
chrome://inspect/#devices
For more details you can read my post: How to view easily your db records
CSS has many pseudo selector like, :active, :hover, :focus, so you can use.
Html
<div class="col-sm-12" id="my_styles">
<button type="submit" class="btn btn-warning" id="1">Button1</button>
<button type="submit" class="btn btn-warning" id="2">Button2</button>
</div>
css
.btn{
background: #ccc;
} .btn:focus{
background: red;
}
<input :required="condition">
You don't need <input :required="test ? true : false">
because if test is truthy you'll already get the required
attribute, and if test is falsy you won't get the attribute. The true : false
part is redundant, much like this...
if (condition) {
return true;
} else {
return false;
}
// or this...
return condition ? true : false;
// can *always* be replaced by...
return (condition); // parentheses generally not needed
The simplest way of doing this binding, then, is <input :required="condition">
Only if the test (or condition) can be misinterpreted would you need to do something else; in that case Syed's use of !!
does the trick.
<input :required="!!condition">
Use this and always use UTC functions afterwards e.g. mydate.getUTCHours();
function getDateUTC(str) {
function getUTCDate(myDateStr){
if(myDateStr.length <= 10){
//const date = new Date(myDateStr); //is already assuming UTC, smart - but for browser compatibility we will add time string none the less
const date = new Date(myDateStr.trim() + 'T00:00:00Z');
return date;
}else{
throw "only date strings, not date time";
}
}
function getUTCDatetime(myDateStr){
if(myDateStr.length <= 10){
throw "only date TIME strings, not date only";
}else{
return new Date(myDateStr.trim() +'Z'); //this assumes no time zone is part of the date string. Z indicates UTC time zone
}
}
let rv = '';
if(str && str.length){
if(str.length <= 10){
rv = getUTCDate(str);
}else if(str.length > 10){
rv = getUTCDatetime(str);
}
}else{
rv = '';
}
return rv;
}
console.info(getDateUTC('2020-02-02').toUTCString());
var mydateee2 = getDateUTC('2020-02-02 02:02:02');
console.info(mydateee2.toUTCString());
// you are free to use all UTC functions on date e.g.
console.info(mydateee2.getUTCHours())
console.info('all is good now if you use UTC functions')
_x000D_
There are two problems with this question:
Assuming you have a gray scale bitmap, you have two factors to consider:
Answer those questions, and then you might be able to find your original answer.
I had a similar problem:
module cv2 has no attribute "cv2.TrackerCSRT_create"
My Python version is 3.8.0 under Windows 10. The problem was the opencv version installation.
So I fixed this way (cmd prompt with administrator privileges):
pip uninstall opencv-python
pip install opencv-contrib-python
Anyway you can read the following guide:
This is one way to do it:
string = "this is a string"
ssplit = string.split()
for word in ssplit:
print (word)
Output:
this
is
a
string
For any number validation you have to use different different range validation as per your requirements :
For Integer
[Range(0, int.MaxValue, ErrorMessage = "Please enter valid integer Number")]
for float
[Range(0, float.MaxValue, ErrorMessage = "Please enter valid float Number")]
for double
[Range(0, double.MaxValue, ErrorMessage = "Please enter valid doubleNumber")]
Pass address of a function as parameter to another function as shown below
#include <stdio.h>
void print();
void execute(void());
int main()
{
execute(print); // sends address of print
return 0;
}
void print()
{
printf("Hello!");
}
void execute(void f()) // receive address of print
{
f();
}
Also we can pass function as parameter using function pointer
#include <stdio.h>
void print();
void execute(void (*f)());
int main()
{
execute(&print); // sends address of print
return 0;
}
void print()
{
printf("Hello!");
}
void execute(void (*f)()) // receive address of print
{
f();
}
Since NumPy version 1.13 it contains an isnat
function:
>>> import numpy as np
>>> np.isnat(np.datetime64('nat'))
True
It also works for arrays:
>>> np.isnat(np.array(['nat', 1, 2, 3, 4, 'nat', 5], dtype='datetime64[D]'))
array([ True, False, False, False, False, True, False], dtype=bool)
I actually had a similar issue, where we had to many trusted root certificates. Our fresh installed webserver had over a hunded. Our root started with the letter Z so it ended up at the end of the list.
The problem was that the IIS sent only the first twenty-something trusted roots to the client and truncated the rest, including ours. It was a few years ago, can't remember the name of the tool... it was part of the IIS admin suite, but Fiddler should do as well. After realizing the error, we removed a lot trusted roots that we don't need. This was done trial and error, so be careful what you delete.
After the cleanup everything worked like a charm.
if you use Picasso change to Glide like this.
Remove picasso
Picasso.get().load(Uri.parse("url")).into(imageView)
Change Glide
Glide.with(context).load("url").into(imageView)
More efficient Glide than Picasso draw to large bitmap
Math.Floor() :
It gives the largest integer less than or equal to the given number.
Math.Floor(3.45) =3
Math.Floor(-3.45) =-4
Math.Truncate():
It removes the decimal places of the number and replace with zero
Math.Truncate(3.45)=3
Math.Truncate(-3.45)=-3
Also from above examples we can see that floor and truncate are same for positive numbers.
print "financial return of outcome 1 = $%.2f" % (out1)
I present a fully worked example on how building a shared library
and using it under Python
by means of ctypes
. I consider the Windows
case and deal with DLLs
. Two steps are needed:
The shared library
I consider is the following and is contained in the testDLL.cpp
file. The only function testDLL
just receives an int
and prints it.
#include <stdio.h>
?
extern "C" {
?
__declspec(dllexport)
?
void testDLL(const int i) {
printf("%d\n", i);
}
?
} // extern "C"
To build a DLL
with Visual Studio
from the command line run
"C:\Program Files (x86)\Microsoft Visual Studio 12.0\Common7\Tools\vsdevcmd"
to set the include path and then run
cl.exe /D_USRDLL /D_WINDLL testDLL.cpp /MT /link /DLL /OUT:testDLL.dll
to build the DLL.
DLL
from the IDEAlternatively, the DLL
can be build using Visual Studio
as follows:
Under Python, do the following
import os
import sys
from ctypes import *
lib = cdll.LoadLibrary('testDLL.dll')
lib.testDLL(3)
Have you tried before and after rather than >= and <=? Also, is this a date or a timestamp?
Same in JAVA 8 :-
//Assecnding order
listOfCountryNames.stream().sorted().forEach((x) -> System.out.println(x));
//Decending order
listOfCountryNames.stream().sorted((o1, o2) -> o2.compareTo(o1)).forEach((x) -> System.out.println(x));
You could use :before
and content:
bearing in mind that this is not supported in IE 7 or below. If you're OK with that then this is your best solution. See the Can I Use or QuirksMode CSS compatibility tables for full details.
A slightly nastier solution that should work in older browsers is to use an image for the bullet point and just make the image look like a dash. See the W3C list-style-image
page for examples.
I did using in-app updates. This will only with devices running Android 5.0 (API level 21) or higher,
Your Problem were the slice declarations in your data structs
(except for Track
, they shouldn't be slices...). This was compounded by some rather goofy fieldnames in the fetched json file, which can be fixed via structtags, see godoc.
The code below parsed the json successfully. If you've further questions, let me know.
package main
import "fmt"
import "net/http"
import "io/ioutil"
import "encoding/json"
type Tracks struct {
Toptracks Toptracks_info
}
type Toptracks_info struct {
Track []Track_info
Attr Attr_info `json: "@attr"`
}
type Track_info struct {
Name string
Duration string
Listeners string
Mbid string
Url string
Streamable Streamable_info
Artist Artist_info
Attr Track_attr_info `json: "@attr"`
}
type Attr_info struct {
Country string
Page string
PerPage string
TotalPages string
Total string
}
type Streamable_info struct {
Text string `json: "#text"`
Fulltrack string
}
type Artist_info struct {
Name string
Mbid string
Url string
}
type Track_attr_info struct {
Rank string
}
func perror(err error) {
if err != nil {
panic(err)
}
}
func get_content() {
url := "http://ws.audioscrobbler.com/2.0/?method=geo.gettoptracks&api_key=c1572082105bd40d247836b5c1819623&format=json&country=Netherlands"
res, err := http.Get(url)
perror(err)
defer res.Body.Close()
decoder := json.NewDecoder(res.Body)
var data Tracks
err = decoder.Decode(&data)
if err != nil {
fmt.Printf("%T\n%s\n%#v\n",err, err, err)
switch v := err.(type){
case *json.SyntaxError:
fmt.Println(string(body[v.Offset-40:v.Offset]))
}
}
for i, track := range data.Toptracks.Track{
fmt.Printf("%d: %s %s\n", i, track.Artist.Name, track.Name)
}
}
func main() {
get_content()
}
http://php.net/manual/en/language.types.string.php says:
Note: As of PHP 7.0.0, there are no particular restrictions regarding the length of a string on 64-bit builds. On 32-bit builds and in earlier versions, a string can be as large as up to 2GB (2147483647 bytes maximum)
In PHP 5.x, strings were limited to 231-1 bytes, because internal code recorded the length in a signed 32-bit integer.
You can slurp in the contents of an entire file, for instance using file_get_contents()
However, a PHP script has a limit on the total memory it can allocate for all variables in a given script execution, so this effectively places a limit on the length of a single string variable too.
This limit is the memory_limit
directive in the php.ini configuration file. The memory limit defaults to 128MB in PHP 5.2, and 8MB in earlier releases.
If you don't specify a memory limit in your php.ini file, it uses the default, which is compiled into the PHP binary. In theory you can modify the source and rebuild PHP to change this default value.
If you specify -1
as the memory limit in your php.ini file, it stop checking and permits your script to use as much memory as the operating system will allocate. This is still a practical limit, but depends on system resources and architecture.
Re comment from @c2:
Here's a test:
<?php
// limit memory usage to 1MB
ini_set('memory_limit', 1024*1024);
// initially, PHP seems to allocate 768KB for basic operation
printf("memory: %d\n", memory_get_usage(true));
$str = str_repeat('a', 255*1024);
echo "Allocated string of 255KB\n";
// now we have allocated all of the 1MB of memory allowed
printf("memory: %d\n", memory_get_usage(true));
// going over the limit causes a fatal error, so no output follows
$str = str_repeat('a', 256*1024);
echo "Allocated string of 256KB\n";
printf("memory: %d\n", memory_get_usage(true));
echo "$string" | tr xyz _
would replace each occurrence of x
, y
, or z
with _
, giving A__BC___DEF__LMN
in your example.
echo "$string" | sed -r 's/[xyz]+/_/g'
would replace repeating occurrences of x
, y
, or z
with a single _
, giving A_BC_DEF_LMN
in your example.
OK, so first this is breaking a basic security feature in PowerShell. With that understanding, here is how you can do it:
You may want to put a -NoProfile
argument in there too depending on what your profile does.
As previously answered here, String
instances are immutable. StringBuffer
and StringBuilder
are mutable and suitable for such a purpose whether you need to be thread safe or not.
There is however a way to modify a String but I would never recommend it because it is unsafe, unreliable and it can can be considered as cheating : you can use reflection to modify the inner char
array the String object contains. Reflection allows you to access fields and methods that are normally hidden in the current scope (private methods or fields from another class...).
public static void main(String[] args) {
String text = "This is a test";
try {
//String.value is the array of char (char[])
//that contains the text of the String
Field valueField = String.class.getDeclaredField("value");
//String.value is a private variable so it must be set as accessible
//to read and/or to modify its value
valueField.setAccessible(true);
//now we get the array the String instance is actually using
char[] value = (char[])valueField.get(text);
//The 13rd character is the "s" of the word "Test"
value[12]='x';
//We display the string which should be "This is a text"
System.out.println(text);
} catch (NoSuchFieldException | SecurityException e) {
e.printStackTrace();
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
}
}
The new version of SharePoint and Office (SharePoint 2010 and Office 2010) respectively are supposed to allow for this. This also includes the web based versions. I have seen Word and Excel in action do this, not sure about other client applications.
I am not sure about the specific implementation features you are asking about in terms of security though. Sorry.,=
Here is a discussion
http://blogs.msdn.com/b/sharepoint/archive/2009/10/19/sharepoint-2010.aspx
This is way more simpler with Maven dependency feature:
Hope this will help!
$a = "10";
$b = (int)$a;
You can use this to convert a string to an int in PHP.
Try this -->
new DzieckoAndOpiekun(
p.Imie,
p.Nazwisko,
p.Opiekun.Imie,
p.Opiekun.Nazwisko).ToList()
Following one is working fine with moments js 2.10 and above
$.fn.dataTableExt.afnFiltering.push(
function( settings, data, dataIndex ) {
var min = $('#min-date').val()
var max = $('#max-date').val()
var createdAt = data[0] || 0; // Our date column in the table
//createdAt=createdAt.split(" ");
var startDate = moment(min, "DD/MM/YYYY");
var endDate = moment(max, "DD/MM/YYYY");
var diffDate = moment(createdAt, "DD/MM/YYYY");
//console.log(startDate);
if (
(min == "" || max == "") ||
(diffDate.isBetween(startDate, endDate))
) { return true; }
return false;
}
);
start sound
startSound("mp3/ba.mp3");
method
private void startSound(String filename) {
AssetFileDescriptor afd = null;
try {
afd = getResources().getAssets().openFd(filename);
} catch (IOException e) {
e.printStackTrace();
}
MediaPlayer player = new MediaPlayer();
try {
assert afd != null;
player.setDataSource(afd.getFileDescriptor(), afd.getStartOffset(), afd.getLength());
} catch (IOException e) {
e.printStackTrace();
}
try {
player.prepare();
} catch (IOException e) {
e.printStackTrace();
}
player.start();
}
Use this Class to get ever the right UTC Time from a Online NTP Server:
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
class NTP_UTC_Time
{
private static final String TAG = "SntpClient";
private static final int RECEIVE_TIME_OFFSET = 32;
private static final int TRANSMIT_TIME_OFFSET = 40;
private static final int NTP_PACKET_SIZE = 48;
private static final int NTP_PORT = 123;
private static final int NTP_MODE_CLIENT = 3;
private static final int NTP_VERSION = 3;
// Number of seconds between Jan 1, 1900 and Jan 1, 1970
// 70 years plus 17 leap days
private static final long OFFSET_1900_TO_1970 = ((365L * 70L) + 17L) * 24L * 60L * 60L;
private long mNtpTime;
public boolean requestTime(String host, int timeout) {
try {
DatagramSocket socket = new DatagramSocket();
socket.setSoTimeout(timeout);
InetAddress address = InetAddress.getByName(host);
byte[] buffer = new byte[NTP_PACKET_SIZE];
DatagramPacket request = new DatagramPacket(buffer, buffer.length, address, NTP_PORT);
buffer[0] = NTP_MODE_CLIENT | (NTP_VERSION << 3);
writeTimeStamp(buffer, TRANSMIT_TIME_OFFSET);
socket.send(request);
// read the response
DatagramPacket response = new DatagramPacket(buffer, buffer.length);
socket.receive(response);
socket.close();
mNtpTime = readTimeStamp(buffer, RECEIVE_TIME_OFFSET);
} catch (Exception e) {
// if (Config.LOGD) Log.d(TAG, "request time failed: " + e);
return false;
}
return true;
}
public long getNtpTime() {
return mNtpTime;
}
/**
* Reads an unsigned 32 bit big endian number from the given offset in the buffer.
*/
private long read32(byte[] buffer, int offset) {
byte b0 = buffer[offset];
byte b1 = buffer[offset+1];
byte b2 = buffer[offset+2];
byte b3 = buffer[offset+3];
// convert signed bytes to unsigned values
int i0 = ((b0 & 0x80) == 0x80 ? (b0 & 0x7F) + 0x80 : b0);
int i1 = ((b1 & 0x80) == 0x80 ? (b1 & 0x7F) + 0x80 : b1);
int i2 = ((b2 & 0x80) == 0x80 ? (b2 & 0x7F) + 0x80 : b2);
int i3 = ((b3 & 0x80) == 0x80 ? (b3 & 0x7F) + 0x80 : b3);
return ((long)i0 << 24) + ((long)i1 << 16) + ((long)i2 << 8) + (long)i3;
}
/**
* Reads the NTP time stamp at the given offset in the buffer and returns
* it as a system time (milliseconds since January 1, 1970).
*/
private long readTimeStamp(byte[] buffer, int offset) {
long seconds = read32(buffer, offset);
long fraction = read32(buffer, offset + 4);
return ((seconds - OFFSET_1900_TO_1970) * 1000) + ((fraction * 1000L) / 0x100000000L);
}
/**
* Writes 0 as NTP starttime stamp in the buffer. --> Then NTP returns Time OFFSET since 1900
*/
private void writeTimeStamp(byte[] buffer, int offset) {
int ofs = offset++;
for (int i=ofs;i<(ofs+8);i++)
buffer[i] = (byte)(0);
}
}
And use it with:
long now = 0;
NTP_UTC_Time client = new NTP_UTC_Time();
if (client.requestTime("pool.ntp.org", 2000)) {
now = client.getNtpTime();
}
If you need UTC Time "now" as DateTimeString use function:
private String get_UTC_Datetime_from_timestamp(long timeStamp){
try{
Calendar cal = Calendar.getInstance();
TimeZone tz = cal.getTimeZone();
int tzt = tz.getOffset(System.currentTimeMillis());
timeStamp -= tzt;
// DateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss",Locale.getDefault());
DateFormat sdf = new SimpleDateFormat();
Date netDate = (new Date(timeStamp));
return sdf.format(netDate);
}
catch(Exception ex){
return "";
}
}
and use it with:
String UTC_DateTime = get_UTC_Datetime_from_timestamp(now);
Add:
using System.Linq;
to the top of your file.
And then:
Car[] carList = ...
var carMake =
from item in carList
where item.Model == "bmw"
select item.Make;
or if you prefer the fluent syntax:
var carMake = carList
.Where(item => item.Model == "bmw")
.Select(item => item.Make);
Things to pay attention to:
item.Make
in the select
clause instead if s.Make
as in your code.item
and .Model
in your where
clauseThere appear to be many working solutions suggesting the error has many actual causes.
In my case I hadn't declared the controller in app/index.html
:
<scipt src="src/controllers/controller-name.controller.js"></script>
Error gone.
for those having problems after adding active and focus give a class or id name to your button and add this to css
for example
//html code
<button id="aboutus">ABOUT US</button>
//css code
#aboutus{background-color: white;border:none;outline-style: none;}
sourceString.Replace(removeString, "");
@
suppresses the error message thrown by the function. fopen
throws an error when the file doesn't exit. @
symbol makes the execution to move to the next line even the file doesn't exists. My suggestion would be not using this in your local environment when you develop a PHP code.
You can subtract a substring from a string using a regular expression in groovy:
String unquotedString = theString - ~/^"/ - ~/"$/
GCM is being replaced with FCM
Have a look at developers.android.com - Google replaced C2DM with GCM Demo Implementation / How To
1) You need to check on the server what HTTP response you are getting from the Google servers. Make sure it is a 200 OK response, so you know the message was sent. If you get another response (302, etc) then the message is not being sent successfully.
2) You also need to check that the Registration ID you are using is correct. If you provide the wrong Registration ID (as a destination for the message - specifying the app, on a specific device) then the Google servers cannot successfully send it.
3) You also need to check that your app is successfully registering with the Google servers, to receive push notifications. If the registration fails, you will not receive messages.
Here is a good question you may should have a look at it: How to add a push notification in my own android app
Also here is a good blog with a really simple how to: http://blog.serverdensity.com/android-push-notifications-tutorial/
Typing in $(this)
will return the jQuery element instead of the HTML Element. Then it just depends on what you want to do in the click event.
alert($(this));
Above answers are okay. But I have found a really nice option to use following in the view:
{{previous_info?.title}}
probably duplicated question Angular2 - error if don't check if {{object.field}} exists
If someone was looking for a way to remove all instances of repeated values, see "How can I efficiently extract repeated elements in a Ruby array?".
a = [1, 2, 2, 3]
counts = Hash.new(0)
a.each { |v| counts[v] += 1 }
p counts.select { |v, count| count == 1 }.keys # [1, 3]
None of posted solutions worked for me. Workaround, which worked:
create a run.bat
and put inside
powershell.exe -file "C:\...\script.ps1"
then set Action to Program/Script: "C:\...\run.bat"
As user1511510 has identified, there's an unusual case when abc is at the end of the file name. We need to look for either /abc/
or /abc
followed by a string-terminator '\0'
. A naive way to do this would be to check if either /abc/
or /abc\0
are substrings:
#include <stdio.h>
#include <string.h>
int main() {
const char *str = "/user/desktop/abc";
const int exists = strstr(str, "/abc/") || strstr(str, "/abc\0");
printf("%d\n",exists);
return 0;
}
but exists
will be 1 even if abc is not followed by a null-terminator. This is because the string literal "/abc\0"
is equivalent to "/abc"
. A better approach is to test if /abc
is a substring, and then see if the character after this substring (indexed using the pointer returned by strstr()
) is either a /
or a '\0'
:
#include <stdio.h>
#include <string.h>
int main() {
const char *str = "/user/desktop/abc", *substr;
const int exists = (substr = strstr(str, "/abc")) && (substr[4] == '\0' || substr[4] == '/');
printf("%d\n",exists);
return 0;
}
This should work in all cases.
Many times when crawling we run into problems where content that is rendered on the page is generated with Javascript and therefore scrapy is unable to crawl for it (eg. ajax requests, jQuery craziness).
However, if you use Scrapy along with the web testing framework Selenium then we are able to crawl anything displayed in a normal web browser.
Some things to note:
You must have the Python version of Selenium RC installed for this to work, and you must have set up Selenium properly. Also this is just a template crawler. You could get much crazier and more advanced with things but I just wanted to show the basic idea. As the code stands now you will be doing two requests for any given url. One request is made by Scrapy and the other is made by Selenium. I am sure there are ways around this so that you could possibly just make Selenium do the one and only request but I did not bother to implement that and by doing two requests you get to crawl the page with Scrapy too.
This is quite powerful because now you have the entire rendered DOM available for you to crawl and you can still use all the nice crawling features in Scrapy. This will make for slower crawling of course but depending on how much you need the rendered DOM it might be worth the wait.
from scrapy.contrib.spiders import CrawlSpider, Rule
from scrapy.contrib.linkextractors.sgml import SgmlLinkExtractor
from scrapy.selector import HtmlXPathSelector
from scrapy.http import Request
from selenium import selenium
class SeleniumSpider(CrawlSpider):
name = "SeleniumSpider"
start_urls = ["http://www.domain.com"]
rules = (
Rule(SgmlLinkExtractor(allow=('\.html', )), callback='parse_page',follow=True),
)
def __init__(self):
CrawlSpider.__init__(self)
self.verificationErrors = []
self.selenium = selenium("localhost", 4444, "*chrome", "http://www.domain.com")
self.selenium.start()
def __del__(self):
self.selenium.stop()
print self.verificationErrors
CrawlSpider.__del__(self)
def parse_page(self, response):
item = Item()
hxs = HtmlXPathSelector(response)
#Do some XPath selection with Scrapy
hxs.select('//div').extract()
sel = self.selenium
sel.open(response.url)
#Wait for javscript to load in Selenium
time.sleep(2.5)
#Do some crawling of javascript created content with Selenium
sel.get_text("//div")
yield item
# Snippet imported from snippets.scrapy.org (which no longer works)
# author: wynbennett
# date : Jun 21, 2011
Reference: http://snipplr.com/view/66998/
Python lists have the index()
method, which you can use to find the position of the first occurrence of an item in a list. Note that list.index()
raises ValueError
when the item is not present in the list, so you may need to wrap it in try
/except
:
try:
idx = lst.index(value)
except ValueError:
idx = None
To find the position of the last occurrence of an item in a list efficiently (i.e. without creating a reversed intermediate list) you can use this function:
def rindex(lst, value):
for i, v in enumerate(reversed(lst)):
if v == value:
return len(lst) - i - 1 # return the index in the original list
return None
print(rindex([1, 2, 3], 3)) # 2
print(rindex([3, 2, 1, 3], 3)) # 3
print(rindex([3, 2, 1, 3], 4)) # None
Guava API provides MoreCollectors.onlyElement() which is a collector that takes a stream containing exactly one element and returns that element.
The returned collector throws an IllegalArgumentException
if the stream consists of two or more elements, and a NoSuchElementException
if the stream is empty.
Refer the below code for usage:
import static com.google.common.collect.MoreCollectors.onlyElement;
Person matchingPerson = objects.stream
.filter(p -> p.email().equals("testemail"))
.collect(onlyElement());
You can use something like code below, if you need to affect only specific value, and not touch others:
view.getLayoutParams().width = newWidth;
Redirection/Piping the output of the file to wc -l
should suffice, like the following:
cat /etc/fstab | wc -l
which then would provide the no. of lines only.
http://php.net/manual/en/function.strtotime.php or if you need to not use a string but time components instead, then http://us.php.net/manual/en/function.mktime.php
Use a semaphore with a count that is equal to the number of readers. Let each reader take one count of the semaphore in order to read, that way they can all read at the same time. Then let the writer take ALL the semaphore counts prior to writing. This causes the writer to wait for all reads to finish and then block out reads while writing.
Technically python do not pass arguments by value: all by reference. But ... since python has two types of objects: immutable and mutable, here is what happens:
Immutable arguments are effectively passed by value: string, integer, tuple are all immutable object types. While they are technically "passed by reference" (like all parameters), since you can't change them in-place inside the function it looks/behaves as if it is passed by value.
Mutable arguments are effectively passed by reference: lists or dictionaries are passed by its pointers. Any in-place change inside the function like (append or del) will affect the original object.
This is how Python is designed: no copies and all are passed by reference. You can explicitly pass a copy.
def sort(array):
# do sort
return array
data = [1, 2, 3]
sort(data[:]) # here you passed a copy
Last point I would like to mention which is a function has its own scope.
def do_any_stuff_to_these_objects(a, b):
a = a * 2
del b['last_name']
number = 1 # immutable
hashmap = {'first_name' : 'john', 'last_name': 'legend'} # mutable
do_any_stuff_to_these_objects(number, hashmap)
print(number) # 1 , oh it should be 2 ! no a is changed inisde the function scope
print(hashmap) # {'first_name': 'john'}
Use this query:
ALTER TABLE tablename ADD columname DATATYPE(size);
And here is an example:
ALTER TABLE Customer ADD LastName VARCHAR(50);
If you are using gradle you can just add this to your build.gradle
springBoot {
executable = true
}
You can then run your application by typing ./your-app.jar
Also, you can find a complete guide here to set up your app as a service
56.1.1 Installation as an init.d service (System V)
http://docs.spring.io/spring-boot/docs/current/reference/html/deployment-install.html
cheers