From https://spark.apache.org/docs/1.5.1/api/java/org/apache/spark/sql/DataFrame.html, use join
:
Inner equi-join with another DataFrame using the given column.
PersonDf.join(ProfileDf,$"personId")
OR
PersonDf.join(ProfileDf,PersonDf("personId") === ProfileDf("personId"))
Update:
You can also save the DFs
as temp table using df.registerTempTable("tableName")
and you can write sql queries using sqlContext
.
To stick with the Maven terms:
http://maven.apache.org/guides/introduction/introduction-to-the-lifecycle.html#Lifecycle_Reference
this works:
if (WindowState == FormWindowState.Minimized)
WindowState = FormWindowState.Normal;
else
{
TopMost = true;
Focus();
BringToFront();
TopMost = false;
}
The problem is that '_' underscores are not valid in header attribute. If removing the underscore is not an option you can add to the server block:
underscores_in_headers on;
This is basically a copy and paste from @kishorer747 comment on @Fleshgrinder answer, and solution is from: https://serverfault.com/questions/586970/nginx-is-not-forwarding-a-header-value-when-using-proxy-pass/586997#586997
I added it here as in my case the application behind nginx was working perfectly fine, but as soon ngix was between my flask app and the client, my flask app would not see the headers any longer. It was kind of time consuming to debug.
Seems like kind of a homely way of doing things, but if you must... you could restructure it as such to fit your needs:
boolean found = false;
case 1:
for (Element arrayItem : array) {
if (arrayItem == whateverValue) {
found = true;
} // else if ...
}
if (found) {
break;
}
case 2:
If you're inserting text content in your document in a location where text content is expected1, you typically only need to escape the same characters as you would in XML. Inside of an element, this just includes the entity escape ampersand &
and the element delimiter less-than and greater-than signs <
>
:
& becomes &
< becomes <
> becomes >
Inside of attribute values you must also escape the quote character you're using:
" becomes "
' becomes '
In some cases it may be safe to skip escaping some of these characters, but I encourage you to escape all five in all cases to reduce the chance of making a mistake.
If your document encoding does not support all of the characters that you're using, such as if you're trying to use emoji in an ASCII-encoded document, you also need to escape those. Most documents these days are encoded using the fully Unicode-supporting UTF-8 encoding where this won't be necessary.
In general, you should not escape spaces as
.
is not a normal space, it's a non-breaking space. You can use these instead of normal spaces to prevent a line break from being inserted between two words, or to insert extra space without it being automatically collapsed, but this is usually a rare case. Don't do this unless you have a design constraint that requires it.
1 By "a location where text content is expected", I mean inside of an element or quoted attribute value where normal parsing rules apply. For example: <p>HERE</p>
or <p title="HERE">...</p>
. What I wrote above does not apply to content that has special parsing rules or meaning, such as inside of a script or style tag, or as an element or attribute name. For example: <NOT-HERE>...</NOT-HERE>
, <script>NOT-HERE</script>
, <style>NOT-HERE</style>
, or <p NOT-HERE="...">...</p>
.
In these contexts, the rules are more complicated and it's much easier to introduce a security vulnerability. I strongly discourage you from ever inserting dynamic content in any of these locations. I have seen teams of competent security-aware developers introduce vulnerabilities by assuming that they had encoded these values correctly, but missing an edge case. There's usually a safer alternative, such as putting the dynamic value in an attribute and then handling it with JavaScript.
If you must, please read the Open Web Application Security Project's XSS Prevention Rules to help understand some of the concerns you will need to keep in mind.
I had similar question however mine involved a column Convert(date,mydatetime). I had to alter the best answer as follows:
Select
count(created_date) as counted_leads,
Convert(date,created_date) as count_date
from table
group by Convert(date,created_date)
This one was driving me crazy. I wanted to avoid using a nullable date time (DateTime?
). I didn't have the option of using SQL Server 2008's datetime2
type either
modelBuilder.Entity<MyEntity>().Property(e => e.MyDateColumn).HasColumnType("datetime2");
I eventually opted for the following:
public class MyDb : DbContext
{
public override int SaveChanges()
{
UpdateDates();
return base.SaveChanges();
}
private void UpdateDates()
{
foreach (var change in ChangeTracker.Entries<MyEntityBaseClass>())
{
var values = change.CurrentValues;
foreach (var name in values.PropertyNames)
{
var value = values[name];
if (value is DateTime)
{
var date = (DateTime)value;
if (date < SqlDateTime.MinValue.Value)
{
values[name] = SqlDateTime.MinValue.Value;
}
else if (date > SqlDateTime.MaxValue.Value)
{
values[name] = SqlDateTime.MaxValue.Value;
}
}
}
}
}
}
Since the deprecation of RequestOptions, sending data as body in a DELETE request is not supported.
If you look at the definition of DELETE, it looks like this:
delete<T>(url: string, options?: {
headers?: HttpHeaders | {
[header: string]: string | string[];
};
observe?: 'body';
params?: HttpParams | {
[param: string]: string | string[];
};
reportProgress?: boolean;
responseType?: 'json';
withCredentials?: boolean;
}): Observable<T>;
You can send payload along with the DELETE request as part of the params in the options object as follows:
this.http.delete('http://testAPI:3000/stuff', { params: {
data: yourData
}).subscribe((data)=>.
{console.log(data)});
However, note that params only accept data as string or string[] so you will not be able to send your own interface data unless you stringify it.
One pragmatic tip: you can search easily for the static_cast keyword in your source code if you plan to tidy up the project.
In C and C++
unsigned = unsigned int (Integer type)
signed = signed int (Integer type)
An unsigned integer containing n bits can have a value between 0 and (2^n-1) , which is 2^n different values.
An unsigned integer is either positive or zero.
Signed integers are stored in a computer using 2's complement.
I just run this command as a root from terminal and problem is solved,
sudo apt-get install -y postgis postgresql-9.3-postgis-2.1
pip install psycopg2
or
sudo apt-get install libpq-dev python-dev
pip install psycopg2
If notepad is already started, you should write:
// import the function in your class
[DllImport ("User32.dll")]
static extern int SetForegroundWindow(IntPtr point);
//...
Process p = Process.GetProcessesByName("notepad").FirstOrDefault();
if (p != null)
{
IntPtr h = p.MainWindowHandle;
SetForegroundWindow(h);
SendKeys.SendWait("k");
}
GetProcessesByName
returns an array of processes, so you should get the first one (or find the one you want).
If you want to start notepad
and send the key, you should write:
Process p = Process.Start("notepad.exe");
p.WaitForInputIdle();
IntPtr h = p.MainWindowHandle;
SetForegroundWindow(h);
SendKeys.SendWait("k");
The only situation in which the code may not work is when notepad
is started as Administrator and your application is not.
According to Google Maps' own help:
Try this command:
git ls-files
This lists all of the files in the repository, including those that are only staged but not yet committed.
http://www.kernel.org/pub/software/scm/git/docs/git-ls-files.html
I ran into this error because I was trying to pass in a date from localStorage
. Passing the date into a new Date
object, and then calling .toISOString() did the trick for me:
const dateFromStorage = localStorage.getItem('someDate');
const date = new Date(dateFromStorage);
const momentDate = moment(date.toISOString());
This suppressed any warnings in the console.
Because if a factor is greater than the square root of n, the other factor that would multiply with it to equal n is necessarily less than the square root of n.
Short story: links. Make use of something like:
a[href='red'] {
color: red;
pointer-events: none;
cursor: default;
text-decoration: none;
}
_x000D_
<a href="red">Look, ma! Red!</a>
_x000D_
(HTML above for demonstration purposes)
And in your md source:
[Look, ma! Red!](red)
Ted Hopp answered this quite nicely. I have been using res/raw for my opengl texture and shader files. I was thinking about moving them to an assets directory to provide a hierarchical organization.
This thread convinced me not to. First, because I like the use of a unique resource id. Second because it's very simple to use InputStream/openRawResource or BitmapFactory to read in the file. Third because it's very useful to be able to use in a portable library.
If you're running OSX and getting this often, another good thing to consider is to use a built-in OSX permissions fixing tool. If you didn't change the mode of your directories, something else did and there's a chance that other directories have overgenerous permissions as well - this tool will reset them back all to factory defaults, which is a good security idea. There's a great guide on the Apple stackextange about this very process.
My favorite and only used construction always was:
typedef enum MyBestEnum
{
/* good enough */
GOOD = 0,
/* even better */
BETTER,
/* divine */
BEST
};
I believe that this will remove your problem you have. Using new type is from my point of view right option.
Best way is to add !important suffix to the selector .
Example:
#selector{
display: inline-block !important;
}
I experienced this exact same issue. For me, the OPTIONS request would go through, but the POST request would say "aborted." This led me to believe that the browser was never making the POST request at all. Chrome said something like "Caution provisional headers are shown" in the request headers but no response headers were shown. In the end I turned to debugging on Firefox which led me to find out my server was responding with an error and no CORS headers were present on the response. Chrome was actually receiving the response, but not allowing the response to be shown in the network view.
For substring(startIndex, endIndex), startIndex is inclusive and endIndex are exclusive. The startIndex and endIndex are very confusing. I would understand substring(startIndex, length) to remember that.
The very keyword 'mutable' is actually a reserved keyword.often it is used to vary the value of constant variable.If you want to have multiple values of a constsnt,use the keyword mutable.
//Prototype
class tag_name{
:
:
mutable var_name;
:
:
};
Very very very simpely no other modules !!!
import os
p = r"C:\Users\bilal\Documents\face Recognition python\imgs\northon.jpg"
# Get the filename only from the initial file path.
filename = os.path.basename(p)
# Use splitext() to get filename and extension separately.
(file, ext) = os.path.splitext(filename)
# Print outcome.
print("Filename without extension =", file)
print("Extension =", ext)
It sounds like what you want is a default image to set your ImageView to when it's not displaying a different image. This is how the Contacts application does it:
if (photoId == 0) {
viewToUse.setImageResource(R.drawable.ic_contact_list_picture);
} else {
// ... here is where they set an actual image ...
}
You can try something like this:
$scope.test = "test1,test2";
{{test.split(',')[0]}}
now you will get "test1" while you try {{test.split(',')[0]}}
and you will get "test2" while you try {{test.split(',')[1]}}
here is my plnkr:
Simply you can get OnClickListener in kotlin
view1.setOnClickListener{
//body
}
If you are creating new array then try this :
$arr = ['key' => 'value'];
And if array is already created then try this :
$arr['key'] = 'value';
I know that this is about matplotlib
, but using pandas
and seaborn
can save you a lot of time:
df = pd.DataFrame(zip(x*3, ["y"]*3+["z"]*3+["k"]*3, y+z+k), columns=["time", "kind", "data"])
plt.figure(figsize=(10, 6))
sns.barplot(x="time", hue="kind", y="data", data=df)
plt.show()
using System.Web;
var encoded = HttpUtility.HtmlEncode(unencoded);
I'll answer this anyway. Just in case someone needs it.
An activity that watches for notifications for the event named "custom-event-name"
.
@Override
public void onCreate(Bundle savedInstanceState) {
...
// Register to receive messages.
// We are registering an observer (mMessageReceiver) to receive Intents
// with actions named "custom-event-name".
LocalBroadcastManager.getInstance(this).registerReceiver(mMessageReceiver,
new IntentFilter("custom-event-name"));
}
// Our handler for received Intents. This will be called whenever an Intent
// with an action named "custom-event-name" is broadcasted.
private BroadcastReceiver mMessageReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
// Get extra data included in the Intent
String message = intent.getStringExtra("message");
Log.d("receiver", "Got message: " + message);
}
};
@Override
protected void onDestroy() {
// Unregister since the activity is about to be closed.
LocalBroadcastManager.getInstance(this).unregisterReceiver(mMessageReceiver);
super.onDestroy();
}
The second activity that sends/broadcasts notifications.
@Override
public void onCreate(Bundle savedInstanceState) {
...
// Every time a button is clicked, we want to broadcast a notification.
findViewById(R.id.button_send).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
sendMessage();
}
});
}
// Send an Intent with an action named "custom-event-name". The Intent sent should
// be received by the ReceiverActivity.
private void sendMessage() {
Log.d("sender", "Broadcasting message");
Intent intent = new Intent("custom-event-name");
// You can also include some extra data.
intent.putExtra("message", "This is my message!");
LocalBroadcastManager.getInstance(this).sendBroadcast(intent);
}
With the code above, every time the button R.id.button_send
is clicked, an Intent is broadcasted and is received by mMessageReceiver
in ReceiverActivity
.
The debug output should look like this:
01-16 10:35:42.413: D/sender(356): Broadcasting message
01-16 10:35:42.421: D/receiver(356): Got message: This is my message!
I was having the same problem just now. I solved it by uninstalling the latest Connector/NET drivers (6.7.4) and then installed the older drivers (6.6.5) and it works.
I am using Visual Studio 2010. I uninstalled the latest ones because I figured they were somehow related to .NET4.5, which I'm not able to use.
Update #1:
Supposedly another way is to register the MySql Connector with various Visual Studio versions (2010/2012/2013/2015...) during installation: Go to Modify Product Features and select all the relevant Visual Studio versions.
Update #2 - Visual Studio 2019 Update:
When I installed MySQL Community with the ConnectorNET and VisualStudio Plugin options included - MySQL didn't show up as a data provider in Visual Studio.
The installer I used included the VS Plugin version 1.2.9, which had supposedly fixed installation issues from 1.2.8, but still didn't work for me...
The solution for me was to uninstall the Connector and the Visual Studio Plugin, download them as individual components, and then install them separately (not as part of the MySQLServer Installer). Install the Connector first, then VS plugin after.
I found the solution here, Thanks to @LambertHeenan.
NOTE about Visual Studio Express
The OP asks whether MySQL is supported with Visual Studio Express (which as far as I can tell has been renamed to Visual Studio Community). In the past MySQL officially didn't support Visual Studio Express, as per @Paul's answer below, but they do officially support Visual Studio Community 2017 and 2019, according to this page.
This is just how Response.Redirect(url, true)
works. It throws the ThreadAbortException
to abort the thread. Just ignore that exception. (I presume it is some global error handler/logger where you see it?)
An interesting related discussion Is Response.End()
Considered Harmful?.
Use a List<T>
instead. For instance, instead of an array of ints
private int[] _myIntegers = new int[1000];
use
private List<int> _myIntegers = new List<int>();
later
_myIntegers.Add(1);
stage.getIcons().add(new Image("/images/logo_only.png"));
It is good habit to make images folder in your src folder and get images from it.
well for one thing, since i dont really understand what you want to do, the lines
int roundUp = roundDown + multiple;
int roundCalc = roundUp;
return (roundCalc);
could definitely be shortened to
int roundUp = roundDown + multiple;
return roundUp;
You can use this way by jquery :
$(document).ready(function(){_x000D_
$('#panel_master_user_job').change(function () {_x000D_
var job = $('#panel_master_user_job').val();_x000D_
alert(job);_x000D_
})_x000D_
})
_x000D_
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>_x000D_
<select name="job" id="panel_master_user_job" class="form-control">_x000D_
<option value="master">Master</option>_x000D_
<option value="user">User</option>_x000D_
<option value="admin">Admin</option>_x000D_
<option value="custom">Custom</option>_x000D_
</select>
_x000D_
$(this).parent().css('z-index',3000);
This seems to work:
/descendant::input[@id="search_query"][2]
I go this from "XSLT 2.0 and XPath 2.0 Programmer's Reference, 4th Edition" by Michael Kay.
There is also a note in the "Abbreviated Syntax" section of the XML Path Language specification http://www.w3.org/TR/xpath/#path-abbrev that provided a clue.
Mathematicians have their own little funny ways, so instead of saying "then we call function f
passing it x
as a parameter" as we programmers would say, they talk about "applying function f
to its argument x
".
In mathematics and computer science, Apply is a function that applies functions to arguments.
Wikipedia
apply
serves the purpose of closing the gap between Object-Oriented and Functional paradigms in Scala. Every function in Scala can be represented as an object. Every function also has an OO type: for instance, a function that takes an Int
parameter and returns an Int
will have OO type of Function1[Int,Int]
.
// define a function in scala
(x:Int) => x + 1
// assign an object representing the function to a variable
val f = (x:Int) => x + 1
Since everything is an object in Scala f
can now be treated as a reference to Function1[Int,Int]
object. For example, we can call toString
method inherited from Any
, that would have been impossible for a pure function, because functions don't have methods:
f.toString
Or we could define another Function1[Int,Int]
object by calling compose
method on f
and chaining two different functions together:
val f2 = f.compose((x:Int) => x - 1)
Now if we want to actually execute the function, or as mathematician say "apply a function to its arguments" we would call the apply
method on the Function1[Int,Int]
object:
f2.apply(2)
Writing f.apply(args)
every time you want to execute a function represented as an object is the Object-Oriented way, but would add a lot of clutter to the code without adding much additional information and it would be nice to be able to use more standard notation, such as f(args)
. That's where Scala compiler steps in and whenever we have a reference f
to a function object and write f (args)
to apply arguments to the represented function the compiler silently expands f (args)
to the object method call f.apply (args)
.
Every function in Scala can be treated as an object and it works the other way too - every object can be treated as a function, provided it has the apply
method. Such objects can be used in the function notation:
// we will be able to use this object as a function, as well as an object
object Foo {
var y = 5
def apply (x: Int) = x + y
}
Foo (1) // using Foo object in function notation
There are many usage cases when we would want to treat an object as a function. The most common scenario is a factory pattern. Instead of adding clutter to the code using a factory method we can apply
object to a set of arguments to create a new instance of an associated class:
List(1,2,3) // same as List.apply(1,2,3) but less clutter, functional notation
// the way the factory method invocation would have looked
// in other languages with OO notation - needless clutter
List.instanceOf(1,2,3)
So apply
method is just a handy way of closing the gap between functions and objects in Scala.
Well, it's not a single statement, but it's about as close as you can get with oracle:
BEGIN
FOR R IN (SELECT owner, table_name FROM all_tables WHERE owner='TheOwner') LOOP
EXECUTE IMMEDIATE 'grant select on '||R.owner||'.'||R.table_name||' to TheUser';
END LOOP;
END;
To Answer the question:
Why can't the container component call the async API, and then dispatch the actions?
I would say for at least two reasons:
The first reason is the separation of concerns, it's not the job of the action creator
to call the api
and get data back, you have to have to pass two argument to your action creator function
, the action type
and a payload
.
The second reason is because the redux store
is waiting for a plain object with mandatory action type and optionally a payload
(but here you have to pass the payload too).
The action creator should be a plain object like below:
function addTodo(text) {
return {
type: ADD_TODO,
text
}
}
And the job of Redux-Thunk midleware
to dispache
the result of your api call
to the appropriate action
.
get all data from table
db.student.find({})
SELECT * FROM student
get all data from table without _id
db.student.find({}, {_id:0})
SELECT name, roll FROM student
get all data from one field with _id
db.student.find({}, {roll:1})
SELECT id, roll FROM student
get all data from one field without _id
db.student.find({}, {roll:1, _id:0})
SELECT roll FROM student
find specified data using where clause
db.student.find({roll: 80})
SELECT * FROM students WHERE roll = '80'
find a data using where clause and greater than condition
db.student.find({ "roll": { $gt: 70 }}) // $gt is greater than
SELECT * FROM student WHERE roll > '70'
find a data using where clause and greater than or equal to condition
db.student.find({ "roll": { $gte: 70 }}) // $gte is greater than or equal
SELECT * FROM student WHERE roll >= '70'
find a data using where clause and less than or equal to condition
db.student.find({ "roll": { $lte: 70 }}) // $lte is less than or equal
SELECT * FROM student WHERE roll <= '70'
find a data using where clause and less than to condition
db.student.find({ "roll": { $lt: 70 }}) // $lt is less than
SELECT * FROM student WHERE roll < '70'
The only time I use a struct instead of a class is when declaring a functor right before using it in a function call and want to minimize syntax for the sake of clarity. e.g.:
struct Compare { bool operator() { ... } };
std::sort(collection.begin(), collection.end(), Compare());
Add display: block;
or display: inline-block;
to your #User_Apps_Content .DLD_App a
This code computes the occurrences of all columns, and prints a sorted report for each of them:
# columnvalues.pl
while (<>) {
@Fields = split /\s+/;
for $i ( 0 .. $#Fields ) {
$result[$i]{$Fields[$i]}++
};
}
for $j ( 0 .. $#result ) {
print "column $j:\n";
@values = keys %{$result[$j]};
@sorted = sort { $result[$j]{$b} <=> $result[$j]{$a} || $a cmp $b } @values;
for $k ( @sorted ) {
print " $k $result[$j]{$k}\n"
}
}
Save the text as columnvalues.pl
Run it as: perl columnvalues.pl files*
In the top-level while loop:
* Loop over each line of the combined input files
* Split the line into the @Fields array
* For every column, increment the result array-of-hashes data structure
In the top-level for loop:
* Loop over the result array
* Print the column number
* Get the values used in that column
* Sort the values by the number of occurrences
* Secondary sort based on the value (for example b vs g vs m vs z)
* Iterate through the result hash, using the sorted list
* Print the value and number of each occurrence
column 0:
a 3
z 3
t 1
v 1
w 1
column 1:
d 3
r 2
b 1
g 1
m 1
z 1
column 2:
c 4
a 3
e 2
If your input files are .csv, change /\s+/
to /,/
In an ugly contest, Perl is particularly well equipped.
This one-liner does the same:
perl -lane 'for $i (0..$#F){$g[$i]{$F[$i]}++};END{for $j (0..$#g){print "$j:";for $k (sort{$g[$j]{$b}<=>$g[$j]{$a}||$a cmp $b} keys %{$g[$j]}){print " $k $g[$j]{$k}"}}}' files*
On Windows I tried doing this
echo off > fff1.txt
and it created a file named fff1.txt with file size of 0kb
I didn't find any commands other than this that could create a empty file.
Note: You have to be in the directory you wish to create the file.
In my case issue was that numberOfRowsInSection
was returning similar number of rows after calling tableView.deleteRows(...)
.
Since this was the required behaviour in my case, I ended up calling tableView.reloadData()
instead of tableView.deleteRows(...)
in cases where numberOfRowsInSection
will remain same after deleting a row.
you have to add flag:
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
or you will cause error with:
startActivity()
from outside of an Activity context requires the FLAG_ACTIVITY_NEW_TASK
Assuming your WebSocket server is listening on the same port as from which the page is being requested, I would suggest:
function createWebSocket(path) {
var protocolPrefix = (window.location.protocol === 'https:') ? 'wss:' : 'ws:';
return new WebSocket(protocolPrefix + '//' + location.host + path);
}
Then, for your case, call it as follows:
var socket = createWebSocket(location.pathname + '/to/ws');
Try jQuery's delegate()
function, like so:
$(document).ready(function(){
$("div.custList table").delegate('tr', 'click', function() {
alert("You clicked my <tr>!");
//get <td> element values here!!??
});
});
A delegate works in the same way as live()
except that live()
cannot be applied to chained items, whereas delegate()
allows you to specify an element within an element to act on.
int i = c - '0';
You should be aware that this doesn't perform any validation against the character - for example, if the character was 'a' then you would get 91 - 48 = 49. Especially if you are dealing with user or network input, you should probably perform validation to avoid bad behavior in your program. Just check the range:
if ('0' <= c && c <= '9') {
i = c - '0';
} else {
/* handle error */
}
Note that if you want your conversion to handle hex digits you can check the range and perform the appropriate calculation.
if ('0' <= c && c <= '9') {
i = c - '0';
} else if ('a' <= c && c <= 'f') {
i = 10 + c - 'a';
} else if ('A' <= c && c <= 'F') {
i = 10 + c - 'A';
} else {
/* handle error */
}
That will convert a single hex character, upper or lowercase independent, into an integer.
Even though its not directly related. But I found that the CALC code won't work if you do not put spaces properly.
So this did not work for me calc(#{$a}+7px)
But this worked calc(#{$a} + 7px)
Took me sometime to figure this out.
All other answers are useful but they may not help you in case nginx
is not on PATH
so you're getting command not found
when trying to run nginx
:
I have nginx 1.2.1 on Debian 7 Wheezy, the nginx
executable is not on PATH
, so I needed to locate it first. It was already running, so using ps aux | grep nginx
I have found out that it's located on /usr/sbin/nginx
, therefore I needed to run /usr/sbin/nginx -t
.
If you want to use a non-default configuration file (i.e. not /etc/nginx/nginx.conf
), run it with the -c
parameter: /usr/sbin/nginx -c <path-to-configuration> -t
.
You may also need to run it as root
, otherwise nginx may not have permissions to open for example logs, so the command would fail.
So many questions here. I see at least two, maybe three:
*args
being used for?The first question is trivially answered in the Python Standard Library reference:
pop(key[, default])
If key is in the dictionary, remove it and return its value, else return default. If default is not given and key is not in the dictionary, a KeyError is raised.
The second question is covered in the Python Language Reference:
If the form “*identifier” is present, it is initialized to a tuple receiving any excess positional parameters, defaulting to the empty tuple. If the form “**identifier” is present, it is initialized to a new dictionary receiving any excess keyword arguments, defaulting to a new empty dictionary.
In other words, the pop
function takes at least two arguments. The first two get assigned the names self
and key
; and the rest are stuffed into a tuple called args
.
What's happening on the next line when *args
is passed along in the call to self.data.pop
is the inverse of this - the tuple *args
is expanded to of positional parameters which get passed along. This is explained in the Python Language Reference:
If the syntax *expression appears in the function call, expression must evaluate to a sequence. Elements from this sequence are treated as if they were additional positional arguments
In short, a.pop()
wants to be flexible and accept any number of positional parameters, so that it can pass this unknown number of positional parameters on to self.data.pop()
.
This gives you flexibility; data
happens to be a dict
right now, and so self.data.pop()
takes either one or two parameters; but if you changed data
to be a type which took 19 parameters for a call to self.data.pop()
you wouldn't have to change class a
at all. You'd still have to change any code that called a.pop()
to pass the required 19 parameters though.
I found the it wonderful to cover multiple variants of date time format like this:
final DateTimeFormatterBuilder dtfb = new DateTimeFormatterBuilder();
dtfb.appendOptional(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss.SSSSSSSSS"))
.appendOptional(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss.SSSSSSSS"))
.appendOptional(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss.SSSSSSS"))
.appendOptional(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss.SSSSSS"))
.appendOptional(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss.SSSSS"))
.appendOptional(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss.SSSS"))
.appendOptional(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss.SSS"))
.appendOptional(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss.SS"))
.appendOptional(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss.S"))
.parseDefaulting(ChronoField.HOUR_OF_DAY, 0)
.parseDefaulting(ChronoField.MINUTE_OF_HOUR, 0)
.parseDefaulting(ChronoField.SECOND_OF_MINUTE, 0);
Almost all the Answers and Comments have been heavy on the Pros and light on the Cons. Here's a recap of all Pros and Cons so far plus some crucial Cons (in #2 below) I've only seen mentioned once or not at all.
1.1. More ISO compliant (ISO 8601) (although I don’t know how this comes into play in practice).
1.2. More range (1/1/0001 to 12/31/9999 vs. 1/1/1753-12/31/9999) (although the extra range, all prior to year 1753, will likely not be used except for ex., in historical, astronomical, geologic, etc. apps).
1.3. Exactly matches the range of .NET’s DateTime
Type’s range (although both convert back and forth with no special coding if values are within the target type’s range and precision except for Con # 2.1 below else error / rounding will occur).
1.4. More precision (100 nanosecond aka 0.000,000,1 sec. vs. 3.33 millisecond aka 0.003,33 sec.) (although the extra precision will likely not be used except for ex., in engineering / scientific apps).
1.5. When configured for similar (as in 1 millisec not "same" (as in 3.33 millisec) as Iman Abidi has claimed) precision as DateTime
, uses less space (7 vs. 8 bytes), but then of course, you’d be losing the precision benefit which is likely one of the two (the other being range) most touted albeit likely unneeded benefits).
2.1. When passing a Parameter to a .NET SqlCommand
, you must specify System.Data.SqlDbType.DateTime2
if you may be passing a value outside the SQL Server DateTime
’s range and/or precision, because it defaults to System.Data.SqlDbType.DateTime
.
2.2. Cannot be implicitly / easily converted to a floating-point numeric (# of days since min date-time) value to do the following to / with it in SQL Server expressions using numeric values and operators:
2.2.1. add or subtract # of days or partial days. Note: Using DateAdd
Function as a workaround is not trivial when you're needing to consider multiple if not all parts of the date-time.
2.2.2. take the difference between two date-times for purposes of “age” calculation. Note: You cannot simply use SQL Server’s DateDiff
Function instead, because it does not compute age
as most people would expect in that if the two date-times happens to cross a calendar / clock date-time boundary of the units specified if even for a tiny fraction of that unit, it’ll return the difference as 1 of that unit vs. 0. For example, the DateDiff
in Day
’s of two date-times only 1 millisecond apart will return 1 vs. 0 (days) if those date-times are on different calendar days (i.e. “1999-12-31 23:59:59.9999999” and “2000-01-01 00:00:00.0000000”). The same 1 millisecond difference date-times if moved so that they don’t cross a calendar day, will return a “DateDiff” in Day
’s of 0 (days).
2.2.3. take the Avg
of date-times (in an Aggregate Query) by simply converting to “Float” first and then back again to DateTime
.
NOTE: To convert DateTime2
to a numeric, you have to do something like the following formula which still assumes your values are not less than the year 1970 (which means you’re losing all of the extra range plus another 217 years. Note: You may not be able to simply adjust the formula to allow for extra range because you may run into numeric overflow issues.
25567 + (DATEDIFF(SECOND, {d '1970-01-01'}, @Time) + DATEPART(nanosecond, @Time) / 1.0E + 9) / 86400.0
– Source: “ https://siderite.dev/blog/how-to-translate-t-sql-datetime2-to.html “
Of course, you could also Cast
to DateTime
first (and if necessary back again to DateTime2
), but you'd lose the precision and range (all prior to year 1753) benefits of DateTime2
vs. DateTime
which are prolly the 2 biggest and also at the same time prolly the 2 least likely needed which begs the question why use it when you lose the implicit / easy conversions to floating-point numeric (# of days) for addition / subtraction / "age" (vs. DateDiff
) / Avg
calcs benefit which is a big one in my experience.
Btw, the Avg
of date-times is (or at least should be) an important use case. a) Besides use in getting average duration when date-times (since a common base date-time) are used to represent duration (a common practice), b) it’s also useful to get a dashboard-type statistic on what the average date-time is in the date-time column of a range / group of Rows. c) A standard (or at least should be standard) ad-hoc Query to monitor / troubleshoot values in a Column that may not be valid ever / any longer and / or may need to be deprecated is to list for each value the occurrence count and (if available) the Min
, Avg
and Max
date-time stamps associated with that value.
Extensions are not supported, see: https://developers.google.com/chrome/mobile/docs/faq .
Specifically:
Does Chrome for Android now support the embedded WebView for a hybrid native/web app?
A Chrome-based WebView is included in Android 4.4 (KitKat) and later. See the WebView overview for details.
Does Chrome for Android support apps and extensions?
Chrome apps and extensions are currently not supported on Chrome for Android. We have no plans to announce at this time.
Can I write and deploy web apps on Chrome for Android?
Though Chrome apps are not currently supported, we would love to see great interactive web sites accessible by URL.
Possible duplicate: Check if an element has event listener on it. No jQuery Please find my answer there.
Basically here is the trick for Chromium (Chrome) browser:
getEventListeners(document.querySelector('your-element-selector'));
Thanks unwired your solution was very clean. I was using horizontal bootstrap forms and made a couple modifications to allow for a single handler and form css.
html: - UPDATED to use Bootstrap's has-feedback and form-control-feedback
<div class="container">
<form class="form-horizontal">
<div class="form-group has-feedback">
<label for="txt1" class="col-sm-2 control-label">Label 1</label>
<div class="col-sm-10">
<input id="txt1" type="text" class="form-control hasclear" placeholder="Textbox 1">
<span class="clearer glyphicon glyphicon-remove-circle form-control-feedback"></span>
</div>
</div>
<div class="form-group has-feedback">
<label for="txt2" class="col-sm-2 control-label">Label 2</label>
<div class="col-sm-10">
<input id="txt2" type="text" class="form-control hasclear" placeholder="Textbox 2">
<span class="clearer glyphicon glyphicon-remove-circle form-control-feedback"></span>
</div>
</div>
<div class="form-group has-feedback">
<label for="txt3" class="col-sm-2 control-label">Label 3</label>
<div class="col-sm-10">
<input id="txt3" type="text" class="form-control hasclear" placeholder="Textbox 3">
<span class="clearer glyphicon glyphicon-remove-circle form-control-feedback"></span>
</div>
</div>
</form>
</div>
javascript:
$(".hasclear").keyup(function () {
var t = $(this);
t.next('span').toggle(Boolean(t.val()));
});
$(".clearer").hide($(this).prev('input').val());
$(".clearer").click(function () {
$(this).prev('input').val('').focus();
$(this).hide();
});
example: http://www.bootply.com/130682
This message displays when Internet Explorer reaches the maximum number of synchronous instructions for a piece of JavaScript. The default maximum is 5,000,000 instructions, you can increase this number on a single machine by editing the registry.
Internet Explorer now tracks the total number of executed script statements and resets the value each time that a new script execution is started, such as from a timeout or from an event handler, for the current page with the script engine. Internet Explorer displays a "long-running script" dialog box when that value is over a threshold amount.
The only way to solve the problem for all users that might be viewing your page is to break up the number of iterations your loop performs using timers, or refactor your code so that it doesn't need to process as many instructions.
Breaking up a loop with timers is relatively straightforward:
var i=0;
(function () {
for (; i < 6000000; i++) {
/*
Normal processing here
*/
// Every 100,000 iterations, take a break
if ( i > 0 && i % 100000 == 0) {
// Manually increment `i` because we break
i++;
// Set a timer for the next iteration
window.setTimeout(arguments.callee);
break;
}
}
})();
If you want to set the Cache-Control header, there's nothing in the IIS7 UI to do this, sadly.
You can however drop this web.config in the root of the folder or site where you want to set it:
<?xml version="1.0" encoding="UTF-8"?>
<configuration>
<system.webServer>
<staticContent>
<clientCache cacheControlMode="UseMaxAge" cacheControlMaxAge="7.00:00:00" />
</staticContent>
</system.webServer>
</configuration>
That will inform the client to cache content for 7 days in that folder and all subfolders.
You can also do this by editing the IIS7 metabase via appcmd.exe
, like so:
\Windows\system32\inetsrv\appcmd.exe set config "Default Web Site/folder" -section:system.webServer/staticContent -clientCache.cacheControlMode:UseMaxAge \Windows\system32\inetsrv\appcmd.exe set config "Default Web Site/folder" -section:system.webServer/staticContent -clientCache.cacheControlMaxAge:"7.00:00:00"
That's Ctrl + i.
Or for low-tech, cut and then paste. It'll reformat on paste.
Thing which worked for me is is to uncheck the usb debug mode under your mobile setting developer option and allow again it will show the my device option
To expand on what @JoshuaMaddox said, in the MDN Learning Area, under the "Introduction to HTML" section, the Document and website structure sub-section says (bold/emphasis is by me):
Header
Usually a big strip across the top with a big heading and/or logo. This is where the main common information about a website usually stays from one webpage to another.
Navigation bar
Links to the site's main sections; usually represented by menu buttons, links, or tabs. Like the header, this content usually remains consistent from one webpage to another — having an inconsistent navigation on your website will just lead to confused, frustrated users. Many web designers consider the navigation bar to be part of the header rather than a individual component, but that's not a requirement; in fact some also argue that having the two separate is better for accessibility, as screen readers can read the two features better if they are separate.
What I used to do was to have a command line switch which would start the program either as a service or as a regular application. Then, in my IDE I would set the switch so that I could step through my code.
With some languages you can actually detect if it's running in an IDE, and perform this switch automatically.
What language are you using?
I encountered this problem just now. I checked log file and found it is caused by the server was not shutdown correctly. So I found this http://rivenlinux.info/how-to-recover-innodb-corruption-for-mysql/ and add a simple configuration "innodb_force_recovery = 1" in [mysqld] in my.cnf. Then the problem was solved.
The log file is located /Applications/XAMPP/xamppfiles/var/mysql and it named accroding to your server name. Just link this XXX-MacBook-Pro.local.err
Another option that nobody here has mentioned yet is to do a staggered load of the database using a tool like BigDump to work around the limit. It's a simple PHP script that loads a chunk of the database at a time before restarting itself and moving on the the next chunk.
Assign value to a hidden field in the code-behind file. Access this value in your javascript like a normal HTML control.
Shift+J removes the line change character from the current line, so by pressing "J" at any place in the line you can combine the current line and the next line in the way you want.
This is the most exhaustive answer so far and gets rid of the need for a $i
variable floating around. It is a combo of Kip and Gnarf's answers.
$array = array( 'cat' => 'meow', 'dog' => 'woof', 'cow' => 'moo', 'computer' => 'beep' );
foreach( array_keys( $array ) as $index=>$key ) {
// display the current index + key + value
echo $index . ':' . $key . $array[$key];
// first index
if ( $index == 0 ) {
echo ' -- This is the first element in the associative array';
}
// last index
if ( $index == count( $array ) - 1 ) {
echo ' -- This is the last element in the associative array';
}
echo '<br>';
}
Hope it helps someone.
DELETE TableA
FROM TableA a
INNER JOIN TableB b
ON b.Bid = a.Bid
AND [my filter condition]
should work
image.setLayoutParams(new ViewGroup.LayoutParams(width, height));
example:
image.setLayoutParams(new ViewGroup.LayoutParams(150, 150));
nginx
, like all well-behaved programs, can be configured not to self-daemonize.
Use the daemon off
configuration directive described in http://wiki.nginx.org/CoreModule.
If you use Eclipse then double click on servers and double click on tomcat server then one file will open. In that file change HTTP port to some other port number and save(Ctrl+S) then again start the server.
$.each(selectValues, function(key, value) {
$('#mySelect').append($("<option/>", {
value: key, text: value
}));
});
Taken from http://forum.jquery.com/topic/multiple-versions-of-jquery-on-the-same-page:
$
and jQuery
belong to versionX.$
and jQuery
belong to versionY, plus _$
and _jQuery
belong to versionX.my_jQuery = jQuery.noConflict(true);
-- now $
and jQuery
belong to versionX, _$
and _jQuery
are probably null, and my_jQuery
is versionY.The simplest way with ES6
:
this.setState(prevState => ({
array: [...prevState.array, newElement]
}))
my_list = ['this\n', 'is\n', 'a\n', 'list\n', 'of\n', 'words\n']
print([l.strip() for l in my_list])
Output:
['this', 'is', 'a', 'list', 'of', 'words']
This is super hacky. Don’t do this in production.
Add this to your application:didFinishLaunchingWithOptions:
:
Swift:
// Delay 1 second
RunLoop.current.run(until: Date(timeIntervalSinceNow: 1.0))
Objective C:
// Delay 1 second
[[NSRunLoop currentRunLoop]runUntilDate:[NSDate dateWithTimeIntervalSinceNow: 1.0]];
/*first of all, and this might be the problem amongst junior devs out there, like myself: make sure to use "lambda" >>>> "`" and not "'" in your fetch method! */
``` const response = await fetch(https://api....
);
/plus, the following article is highly recommended: https://developer.edamam.com/api/faq/
If you have a package.json, you can install all the current project dependencies using:
npm install
You can't get the file size of local files with javascript in a standard way using a web browser.
But if the file is accessible from a remote path, you might be able to send a HEAD request using Javascript, and read the Content-length header, depending on the webserver
The issue is not with the version of node. Instead, it is the way NodeJS is installed by default in Ubuntu. When running a Node application in Ubuntu you have to run nodejs somethign.js
instead of node something.js
So the application name called in the terminal is nodejs
and not node
. This is why there is a need for a symlink to simply forward all the commands received as node
to nodejs
.
sudo ln -s /usr/bin/nodejs /usr/bin/node
During the preflight request, you should see the following two headers: Access-Control-Request-Method and Access-Control-Request-Headers. These request headers are asking the server for permissions to make the actual request. Your preflight response needs to acknowledge these headers in order for the actual request to work.
For example, suppose the browser makes a request with the following headers:
Origin: http://yourdomain.com
Access-Control-Request-Method: POST
Access-Control-Request-Headers: X-Custom-Header
Your server should then respond with the following headers:
Access-Control-Allow-Origin: http://yourdomain.com
Access-Control-Allow-Methods: GET, POST
Access-Control-Allow-Headers: X-Custom-Header
Pay special attention to the Access-Control-Allow-Headers response header. The value of this header should be the same headers in the Access-Control-Request-Headers request header, and it can not be '*'.
Once you send this response to the preflight request, the browser will make the actual request. You can learn more about CORS here: http://www.html5rocks.com/en/tutorials/cors/
Another option besides awk is nl which allows for options -v
for setting starting value and -n <lf,rf,rz>
for left, right and right with leading zeros justified. You can also include -s
for a field separator such as -s ","
for comma separation between line numbers and your data.
In a Unix environment, this can be done as
cat <infile> | ...other stuff... | nl -v 0 -n rz
or simply
nl -v 0 -n rz <infile>
Example:
echo "Here
are
some
words" > words.txt
cat words.txt | nl -v 0 -n rz
Out:
000000 Here
000001 are
000002 some
000003 words
If you are using .NET 3.5+ you could use LINQ (Language INtegrated Query).
test = test.Where(x => !string.IsNullOrEmpty(x)).ToArray();
You can try this. Function below sets all values of object's properties to undefined. Works as well with nested objects.
var clearObjectValues = (objToClear) => {
Object.keys(objToClear).forEach((param) => {
if ( (objToClear[param]).toString() === "[object Object]" ) {
clearObjectValues(objToClear[param]);
} else {
objToClear[param] = undefined;
}
})
return objToClear;
};
One of the most promising approaches seems to be opening a second communication channel back to the server to ask it how much of the transfer has been completed.
For the 24-hour time, you need to use HH24
instead of HH
.
For the 12-hour time, the AM/PM indicator is written as A.M.
(if you want periods in the result) or AM
(if you don't). For example:
SELECT invoice_date,
TO_CHAR(invoice_date, 'DD-MM-YYYY HH24:MI:SS') "Date 24Hr",
TO_CHAR(invoice_date, 'DD-MM-YYYY HH:MI:SS AM') "Date 12Hr"
FROM invoices
;
For more information on the format models you can use with TO_CHAR
on a date, see http://docs.oracle.com/cd/E16655_01/server.121/e17750/ch4datetime.htm#NLSPG004.
You have to retrieve it from the HOST
header.
var host = req.get('host');
It is optional with HTTP 1.0, but required by 1.1. And, the app can always impose a requirement of its own.
If this is for supporting cross-origin requests, you would instead use the Origin
header.
var origin = req.get('origin');
Note that some cross-origin requests require validation through a "preflight" request:
req.options('/route', function (req, res) {
var origin = req.get('origin');
// ...
});
If you're looking for the client's IP, you can retrieve that with:
var userIP = req.socket.remoteAddress;
Note that, if your server is behind a proxy, this will likely give you the proxy's IP. Whether you can get the user's IP depends on what info the proxy passes along. But, it'll typically be in the headers as well.
This is an example of using REG_EXTENDED. This regular expression
"^(-)?([0-9]+)((,|.)([0-9]+))?\n$"
Allows you to catch decimal numbers in Spanish system and international. :)
#include <regex.h>
#include <stdlib.h>
#include <stdio.h>
regex_t regex;
int reti;
char msgbuf[100];
int main(int argc, char const *argv[])
{
while(1){
fgets( msgbuf, 100, stdin );
reti = regcomp(®ex, "^(-)?([0-9]+)((,|.)([0-9]+))?\n$", REG_EXTENDED);
if (reti) {
fprintf(stderr, "Could not compile regex\n");
exit(1);
}
/* Execute regular expression */
printf("%s\n", msgbuf);
reti = regexec(®ex, msgbuf, 0, NULL, 0);
if (!reti) {
puts("Match");
}
else if (reti == REG_NOMATCH) {
puts("No match");
}
else {
regerror(reti, ®ex, msgbuf, sizeof(msgbuf));
fprintf(stderr, "Regex match failed: %s\n", msgbuf);
exit(1);
}
/* Free memory allocated to the pattern buffer by regcomp() */
regfree(®ex);
}
}
I got lucky and answered this in a comment to the question, but I'm posting a full answer for the sake of completeness and so we can mark this question as "Answered".
It depends on what you want to accomplish by sharing a controller; you can either share the same controller (though have different instances), or you can share the same controller instance.
Share a Controller
Two directives can use the same controller by passing the same method to two directives, like so:
app.controller( 'MyCtrl', function ( $scope ) {
// do stuff...
});
app.directive( 'directiveOne', function () {
return {
controller: 'MyCtrl'
};
});
app.directive( 'directiveTwo', function () {
return {
controller: 'MyCtrl'
};
});
Each directive will get its own instance of the controller, but this allows you to share the logic between as many components as you want.
Require a Controller
If you want to share the same instance of a controller, then you use require
.
require
ensures the presence of another directive and then includes its controller as a parameter to the link function. So if you have two directives on one element, your directive can require the presence of the other directive and gain access to its controller methods. A common use case for this is to require ngModel
.
^require
, with the addition of the caret, checks elements above directive in addition to the current element to try to find the other directive. This allows you to create complex components where "sub-components" can communicate with the parent component through its controller to great effect. Examples could include tabs, where each pane can communicate with the overall tabs to handle switching; an accordion set could ensure only one is open at a time; etc.
In either event, you have to use the two directives together for this to work. require
is a way of communicating between components.
Check out the Guide page of directives for more info: http://docs.angularjs.org/guide/directive
The timeout configuration needs to be set at the client level, so the configuration I was setting in the web.config had no effect, the WCF test tool has its own configuration and there is where you need to set the timeout.
TikZ can do this.
A quick demo:
\documentclass{article}
\usepackage{tikz}
\begin{document}
\begin{tikzpicture}
[scale=.8,auto=left,every node/.style={circle,fill=blue!20}]
\node (n6) at (1,10) {6};
\node (n4) at (4,8) {4};
\node (n5) at (8,9) {5};
\node (n1) at (11,8) {1};
\node (n2) at (9,6) {2};
\node (n3) at (5,5) {3};
\foreach \from/\to in {n6/n4,n4/n5,n5/n1,n1/n2,n2/n5,n2/n3,n3/n4}
\draw (\from) -- (\to);
\end{tikzpicture}
\end{document}
produces:
More examples @ http://www.texample.net/tikz/examples/tag/graphs/
More information about TikZ: http://sourceforge.net/projects/pgf/ where I guess an installation guide will also be present.
AppendChild
(E) is more than 2x faster than other solutions on chrome and safari, insertAdjacentHTML
(F) is fastest on firefox. The innerHTML=
(B) (do not confuse with +=
(A)) is second fast solution on all browsers and it is much more handy than E and F.
Set up environment (2019.07.10) MacOs High Sierra 10.13.4 on Chrome 75.0.3770 (64-bit), Safari 11.1.0 (13604.5.6), Firefox 67.0.0 (64-bit)
You can replay test in your machine here
function A() { _x000D_
container.innerHTML += '<p>A: Just some <span>text</span> here</p>';_x000D_
}_x000D_
_x000D_
function B() { _x000D_
container.innerHTML = '<p>B: Just some <span>text</span> here</p>';_x000D_
}_x000D_
_x000D_
function C() { _x000D_
$('#container').append('<p>C: Just some <span>text</span> here</p>');_x000D_
}_x000D_
_x000D_
function D() {_x000D_
var p = document.createElement("p");_x000D_
p.innerHTML = 'D: Just some <span>text</span> here';_x000D_
container.appendChild(p);_x000D_
}_x000D_
_x000D_
function E() { _x000D_
var p = document.createElement("p");_x000D_
var s = document.createElement("span"); _x000D_
s.appendChild( document.createTextNode("text ") );_x000D_
p.appendChild( document.createTextNode("E: Just some ") );_x000D_
p.appendChild( s );_x000D_
p.appendChild( document.createTextNode(" here") );_x000D_
container.appendChild(p);_x000D_
}_x000D_
_x000D_
function F() { _x000D_
container.insertAdjacentHTML('beforeend', '<p>F: Just some <span>text</span> here</p>');_x000D_
}_x000D_
_x000D_
A();_x000D_
B();_x000D_
C();_x000D_
D();_x000D_
E();_x000D_
F();
_x000D_
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>_x000D_
_x000D_
This snippet only for show code used in test (in jsperf.com) - it not perform test itself. _x000D_
<div id="container"></div>
_x000D_
Security Warning:
md5(uniqid(rand(), TRUE))
is not a secure way to generate random numbers. See this answer for more information and a solution that leverages a cryptographically secure random number generator.
Looks like you need an else with your if.
if (!isset($_SESSION['token'])) {
$token = md5(uniqid(rand(), TRUE));
$_SESSION['token'] = $token;
$_SESSION['token_time'] = time();
}
else
{
$token = $_SESSION['token'];
}
I always add this style to my Bootstrap LESS / SASS:
.row-no-padding {
[class*="col-"] {
padding-left: 0 !important;
padding-right: 0 !important;
}
}
Then in the HTML you can write:
<div class="row row-no-padding">
glob() has provisions for sorting and pattern matching. Since the return value is an array, you can do most of everything else you need.
I am using 0.56RC secureTextEntry={true} Along with password={true} then only its working as mentioned by @NicholasByDesign
Yes, you need to have the header Access-Control-Allow-Origin: http://domain.com:3000
or Access-Control-Allow-Origin: *
on both the OPTIONS response and the POST response. You should include the header Access-Control-Allow-Credentials: true
on the POST response as well.
Your OPTIONS response should also include the header Access-Control-Allow-Headers: origin, content-type, accept
to match the requested header.
As explained above, you can use the Firebase default push id.
If you want something numeric you can do something based on the timestamp to avoid collisions
f.e. something based on date,hour,second,ms, and some random int at the end
01612061353136799031
Which translates to:
016-12-06 13:53:13:679 9031
It all depends on the precision you need (social security numbers do the same with some random characters at the end of the date). Like how many transactions will be expected during the day, hour or second. You may want to lower precision to favor ease of typing.
You can also do a transaction that increments the number id, and on success you will have a unique consecutive number for that user. These can be done on the client or server side.
(https://firebase.google.com/docs/database/android/read-and-write)
In [44]: df['gdp'] = df['gdp'].shift(-1)
In [45]: df
Out[45]:
y gdp cap
0 1 3 5
1 2 7 9
2 8 4 2
3 3 7 7
4 6 NaN 7
In [46]: df[:-1]
Out[46]:
y gdp cap
0 1 3 5
1 2 7 9
2 8 4 2
3 3 7 7
It's actually a quirk in Chrome, not the JavaScript library. Here's the fix:
To prevent the message appearing and also allow chrome to render the response nicely as JSON in the console, append a query string to your request URL.
e.g
var xhr_object = new XMLHttpRequest();
var url = 'mysite.com/'; // Using this one, Chrome throws error
var url = 'mysite.com/?'; // Using this one, Chrome works
xhr_object.open('POST', url, false);
By lines I assume you mean rows in the table person
. What you're looking for is:
select p.name
from person p
where p.name LIKE '%A%'; --contains the character 'A'
The above is case sensitive. For a case insensitive search, you can do:
select p.name
from person p
where UPPER(p.name) LIKE '%A%'; --contains the character 'A' or 'a'
For the special character, you can do:
select p.name
from person p
where p.name LIKE '%'||chr(8211)||'%'; --contains the character chr(8211)
The LIKE
operator matches a pattern. The syntax of this command is described in detail in the Oracle documentation. You will mostly use the %
sign as it means match zero or more characters.
Right Click On Project -> Open Module Settings -> Click SDK's
Choose Java Home Directory
Well, the first interpretation is correct. However, your reasoning about the "signed semantics" in this context is wrong.
Again, your first interpretation is correct. Unsigned arithmetic follow the rules of modulo arithmetic, meaning that 0x0000 - 0x0001
evaluates to 0xFFFF
for 32-bit unsigned types.
However, the second interpretation (the one based on "signed semantics") is also required to produce the same result. I.e. even if you evaluate 0 - 1
in the domain of signed type and obtain -1
as the intermediate result, this -1
is still required to produce 0xFFFF
when later it gets converted to unsigned type. Even if some platform uses an exotic representation for signed integers (1's complement, signed magnitude), this platform is still required to apply rules of modulo arithmetic when converting signed integer values to unsigned ones.
For example, this evaluation
signed int a = 0, b = 1;
unsigned int c = a - b;
is still guaranteed to produce UINT_MAX
in c
, even if the platform is using an exotic representation for signed integers.
You have an extra closing }
in your function.
var nav = document.getElementsByClassName('nav-coll');
for (var i = 0; i < button.length; i++) {
nav[i].addEventListener('click',function(){
console.log('haha');
} // <== remove this brace
}, false);
};
You really should be using something like JSHint or JSLint to help find these things. These tools integrate with many editors and IDEs, or you can just paste a code fragment into the above web sites and ask for an analysis.
you can use numpy to avoid looping:
import numpy as np
list(np.array(my_list).astype(float)
According way you create your user, MySQL interprets a different manner. For instance, if you create a user like this:
create user user01 identified by 'test01';
MySQL expects you give some privilege using grant all on <your_db>.* to user01;
Don't forget to flush privileges;
But, if you create user like that (by passing an IP address), you have to change it to:
create user 'user02'@'localhost' identified by 'teste02';
so, to give some privileges you have to do that:
grant all on <your_db>.* to user02@localhost;
flush privileges;
To store Python objects in files, use the pickle
module:
import pickle
a = {
'a': 1,
'b': 2
}
with open('file.txt', 'wb') as handle:
pickle.dump(a, handle)
with open('file.txt', 'rb') as handle:
b = pickle.loads(handle.read())
print a == b # True
Notice that I never set b = a
, but instead pickled a
to a file and then unpickled it into b
.
As for your error:
self.whip = open('deed.txt', 'r').read()
self.whip
was a dictionary object. deed.txt
contains text, so when you load the contents of deed.txt
into self.whip
, self.whip
becomes the string representation of itself.
You'd probably want to evaluate the string back into a Python object:
self.whip = eval(open('deed.txt', 'r').read())
Notice how eval
sounds like evil
. That's intentional. Use the pickle
module instead.
My 5 cents:
async/await
if and only if you do an IO operation, like DB or external service webservice.P.S. There are exceptional cases for point 1, but you need to have a good understanding of async internals for this.
As an additional advantage, you can do few IO calls in parallel if needed:
Task task1 = FooAsync(); // launch it, but don't wait for result
Task task2 = BarAsync(); // launch bar; now both foo and bar are running
await Task.WhenAll(task1, task2); // this is better in regard to exception handling
// use task1.Result, task2.Result
Not the best method, use an array instead. This is just an alternative method.
http://www.w3schools.com/jsref/jsref_getday.asp
var date = new Date();
var day = date.getDay();
You should really use google before you post here.
Since other people posted the array method I'll show you an alternative way using a switch statement.
switch(day) {
case 0:
day = "Sunday";
break;
case 1:
day = "Monday";
break;
... rest of cases
default:
// do something
break;
}
The above works, however, the array is the better alternative. You may also use if()
statements however a switch statement would be much cleaner then several if's.
I was looking for an answer to this question and later I developed a method! :) A fair warning, it's rounding up the value.
private float limitDigits(float number) {
return Float.valueOf(String.format(Locale.getDefault(), "%.2f", number));
}
That's not really how python works. Just use it like you would a number, and if someone passes you something that's not a number, fail. It's the programmer's responsibility to pass in the correct types.
If you still have files that are supposed to be deleted after re-installing a package, make sure the folder build
is also deleted. Therefore, assuming that pkg
is the package you want to delete:
rm -r $(python3 -c "import pkg; print(pkg.__path__[0] + '*' )")
rm -rf build
Obove work out for python3 and delete the package and its *.egg-info file
peerDependencies
didn't quite make sense for me until I read this snippet from a blog post on the topic Ciro mentioned above:
What [plugins] need is a way of expressing these “dependencies” between plugins and their host package. Some way of saying, “I only work when plugged in to version 1.2.x of my host package, so if you install me, be sure that it’s alongside a compatible host.” We call this relationship a peer dependency.
peerDependencies
are for plugins, libraries that require a "host" library to perform their function, but may have been written at a time before the latest version of the host was released.
That is, if I write PluginX v1
for HostLibraryX v3
and walk away, there's no guarantee PluginX v1
will work when HostLibraryX v4
(or even HostLibraryX v3.0.1
) is released.
From the point of view of the plugin, it only adds functions to the host library. I don't really "need" the host to add a dependency to a plugin, and plugins often don't literally depend on their host. If you don't have the host, the plugin harmlessly does nothing.
This means dependencies
isn't really the right concept for plugins.
Even worse, if my host was treated like a dependency, we'd end up in this situation that the same blog post mentions (edited a little to use this answer's made up host & plugin):
But now, [if we treat the contemporary version of HostLibraryX as a dependency for PluginX,] running
npm install
results in the unexpected dependency graph of+-- [email protected] +-- [email protected] +-- [email protected]
I’ll leave the subtle failures that come from the plugin using a different [HostLibraryX] API than the main application to your imagination.
... that's the whole point of plugins. Now if the host was nice enough to include dependency information for all of its plugins, that'd solve the problem, but that'd also introduce a huge new cultural problem: plugin management!
The whole point of plugins is that they can pair up anonymously. In a perfect world, having the host manage 'em all would be neat & tidy, but we're not going to require libraries herd cats.
Instead, we have the concept of being peers. Neither host nor plugin sits in the other's dependency bucket. Both live at the same level of the dependency graph.
If I'm PluginX v1
and expect a peer of (that is, have a peerDependency of) HostLibraryX v3
, I'll say so. If you've auto-upgraded to the latest HostLibraryX v4
(note that's version 4) AND have Plugin v1
installed, you need to know, right?
npm
can't manage this situation for me --
"Hey, I see you're using
PluginX v1
! I'm automatically downgradingHostLibraryX
from v4 to v3, kk?"
... or...
"Hey I see you're using
PluginX v1
. That expectsHostLibraryX v3
, which you've left in the dust during your last update. To be safe, I'm automatically uninstallingPlugin v1
!!1!
How about no, npm?!
So npm doesn't. It alerts you to the situation, and lets you figure out if HostLibraryX v4
is a suitable peer for Plugin v1
.
Good peerDependency
management in plugins will make this concept work more intuitively in practice. From the blog post, yet again...
One piece of advice: peer dependency requirements, unlike those for regular dependencies, should be lenient. You should not lock your peer dependencies down to specific patch versions. It would be really annoying if one Chai plugin peer-depended on Chai 1.4.1, while another depended on Chai 1.5.0, simply because the authors were lazy and didn’t spend the time figuring out the actual minimum version of Chai they are compatible with.
I'm new to R as well and faced the exact same problem. But then I looked at my data and noticed that it is being caused due to the fact that my csv file was using a comma separator (,) in all numeric columns (Ex: 1,233,444.56 instead of 1233444.56).
I removed the comma separator in my csv file and then reloaded into R. My data frame now recognises all columns as numbers.
I'm sure there's a way to handle this within the read.csv function itself.
HTML 4: No
HTML 5: Yes
The autocomplete attribute is an enumerated attribute. The attribute has two states. The on keyword maps to the on state, and the off keyword maps to the off state. The attribute may also be omitted. The missing value default is the on state. The off state indicates that by default, form controls in the form will have their autofill field name set to off; the on state indicates that by default, form controls in the form will have their
autofill
field name set to "on".
Reference: W3
If you truly want to discard the commits you've made locally, i.e. never have them in the history again, you're not asking how to pull - pull means merge, and you don't need to merge. All you need do is this:
# fetch from the default remote, origin
git fetch
# reset your current branch (master) to origin's master
git reset --hard origin/master
I'd personally recommend creating a backup branch at your current HEAD first, so that if you realize this was a bad idea, you haven't lost track of it.
If on the other hand, you want to keep those commits and make it look as though you merged with origin, and cause the merge to keep the versions from origin only, you can use the ours
merge strategy:
# fetch from the default remote, origin
git fetch
# create a branch at your current master
git branch old-master
# reset to origin's master
git reset --hard origin/master
# merge your old master, keeping "our" (origin/master's) content
git merge -s ours old-master
Starting with CMake 3.15, the correct way of achieving this would be using:
cmake --install <dir> --prefix "/usr"
pmg's answer is very convincing. If you would like to know how static declarations work at object level then this below info could be interesting to you. I reused the same program written by pmg and compiler it into a .so(shared object) file
Following contents are after dumping the .so file into something human readable
0000000000000675 f1: address of f1 function
000000000000068c f2: address of f2(staticc) function
note the difference in the function address , it means something . For a function that's declared with different address , it can very well signify that f2 lives very far away or in a different segment of the object file.
Linkers use something called PLT(Procedure linkage table) and GOT(Global offsets table) to understand symbols that they have access to link to .
For now think that GOT and PLT magically bind all the addresses and a dynamic section holds information of all these functions that are visible by linker.
After dumping the dynamic section of the .so file we get a bunch of entries but only interested in f1 and f2 function.
The dynamic section holds entry only for f1 function at address 0000000000000675 and not for f2 !
Num: Value Size Type Bind Vis Ndx Name
9: 0000000000000675 23 FUNC GLOBAL DEFAULT 11 f1
And thats it !. From this its clear that the linker will be unsuccessful in finding the f2 function since its not in the dynamic section of the .so file.
Simple Working Example of Http request using node.
const http = require('https')
exports.handler = async (event) => {
return httprequest().then((data) => {
const response = {
statusCode: 200,
body: JSON.stringify(data),
};
return response;
});
};
function httprequest() {
return new Promise((resolve, reject) => {
const options = {
host: 'jsonplaceholder.typicode.com',
path: '/todos',
port: 443,
method: 'GET'
};
const req = http.request(options, (res) => {
if (res.statusCode < 200 || res.statusCode >= 300) {
return reject(new Error('statusCode=' + res.statusCode));
}
var body = [];
res.on('data', function(chunk) {
body.push(chunk);
});
res.on('end', function() {
try {
body = JSON.parse(Buffer.concat(body).toString());
} catch(e) {
reject(e);
}
resolve(body);
});
});
req.on('error', (e) => {
reject(e.message);
});
// send the request
req.end();
});
}
Another option using labs
and setting colour to NULL
.
ggplot(df, aes(x, y, colour = g)) +
geom_line(stat = "identity") +
theme(legend.position = "bottom") +
labs(colour = NULL)
You need to group by the duplicate records according to the field(s), then hold one of the records and delete the rest. For example:
DELETE prg.Person WHERE Id IN (
SELECT dublicateRow.Id FROM
(
select MIN(Id) MinId, NationalCode
from prg.Person group by NationalCode having count(NationalCode ) > 1
) GroupSelect
JOIN prg.Person dublicateRow ON dublicateRow.NationalCode = GroupSelect.NationalCode
WHERE dublicateRow.Id <> GroupSelect.MinId)
You should read this getopts tutorial.
Example with -a
switch that requires an argument :
#!/bin/bash
while getopts ":a:" opt; do
case $opt in
a)
echo "-a was triggered, Parameter: $OPTARG" >&2
;;
\?)
echo "Invalid option: -$OPTARG" >&2
exit 1
;;
:)
echo "Option -$OPTARG requires an argument." >&2
exit 1
;;
esac
done
Like greybot said(getopt
!= getopts
) :
The external command getopt(1) is never safe to use, unless you know it is GNU getopt, you call it in a GNU-specific way, and you ensure that GETOPT_COMPATIBLE is not in the environment. Use getopts (shell builtin) instead, or simply loop over the positional parameters.
IPython offers dreload()
to recursively reload all submodules. Personally, I prefer to use the %run()
magic command (though it does not perform a deep reload, as pointed out by John Salvatier in the comments).
Here column name must be decimal.
select CAST(columnname AS decimal(38,0)) from table
You can create a character array that does this via a loop:
>> for i=1:10 Names(i,:)='Sample Text'; end >> Names Names = Sample Text Sample Text Sample Text Sample Text Sample Text Sample Text Sample Text Sample Text Sample Text Sample Text
However, this would be better implemented using REPMAT:
>> Names = repmat('Sample Text', 10, 1) Names = Sample Text Sample Text Sample Text Sample Text Sample Text Sample Text Sample Text Sample Text Sample Text Sample Text
The pip's proxy parameter is, according to pip --help
, in the form scheme://[user:passwd@]proxy.server:port
You should use the following:
pip install --proxy http://user:password@proxyserver:port TwitterApi
Also, the HTTP_PROXY
env var should be respected.
Note that in earlier versions (couldn't track down the change in the code, sorry, but the doc was updated here), you had to leave the scheme://
part out for it to work, i.e. pip install --proxy user:password@proxyserver:port
Your Nesting DIV structure was missing, you must add another ".row" div when creating nested divs in bootstrap :
Here is the Code:
<div class="container">
<div class="row">
<div class="col-md-12">
<div class="row">
<div class="col-md-4"> <a href="">About</a>
</div>
<div class="col-md-4">
<img src="https://www.google.ca/images/srpr/logo11w.png" width="100px" />
</div>
<div class="col-md-4"> <a href="#myModal1" data-toggle="modal">SHARE</a>
</div>
</div>
</div>
</div>
</div>
To nest your content with the default grid, add a new .row and set of .col-sm-* columns within an existing .col-sm-* column. Nested rows should include a set of columns that add up to 12 or less (it is not required that you use all 12 available columns).
The other answers were good answers when the question was asked. Time moves on, Date
and SimpleDateFormat
get replaced by newer and better classes and go out of use. In 2017, use the classes in the java.time
package:
String timeString = LocalDateTime.parse(dateString, DateTimeFormatter.ofPattern("uuuu-MM-dd HH:mm:ss"))
.format(DateTimeFormatter.ofPattern("H:mm"));
The result is the desired, 9:00
.
Just to throw another possible solution on the pile, I'll mention the case I ran into with this error message. The method Bitmap.Save
would throw this exception when saving an bitmap I had transformed and was displaying. I discovered it would not throw the exception if the statement had a breakpoint on it, nor would it if the Bitmap.Save
was preceeded by Thread.Sleep(500)
so I suppose there is some sort of resource contention going on.
Simply copying the image to a new Bitmap object was enough to prevent this exception from appearing:
new Bitmap(oldbitmap).Save(filename);
Just a delegate that returns a boolean. It is used a lot in filtering lists but can be used wherever you'd like.
List<DateRangeClass> myList = new List<DateRangeClass<GetSomeDateRangeArrayToPopulate);
myList.FindAll(x => (x.StartTime <= minDateToReturn && x.EndTime >= maxDateToReturn):
VAL1 and VAL2 need to be dimmed as integer, not as string, to be used as an argument for Cells, which takes integers, not strings, as arguments.
Dim val1 As Integer, val2 As Integer, i As Integer
For i = 1 To 333
Sheets("Feuil2").Activate
ActiveSheet.Cells(i, 1).Select
val1 = Cells(i, 1).Value
val2 = Cells(i, 2).Value
Sheets("Classeur2.csv").Select
Cells(val1, val2).Select
ActiveCell.FormulaR1C1 = "1"
Next i
I fixed a few bugs in the answer provided by Reigel (the accepted answer):
There are some remaining issues concerning spaces. I don't see a solution for double spaces, they are displayed as single spaces in the shadow (html rendering). This cannot be soved by using , because the spaces should break. Also, the textarea breaks a line after a space, if there is no room for that space it will break the line at an earlier point. Suggestions are welcome.
Corrected code:
(function ($) {
$.fn.autogrow = function (options) {
var $this, minHeight, lineHeight, shadow, update;
this.filter('textarea').each(function () {
$this = $(this);
minHeight = $this.height();
lineHeight = $this.css('lineHeight');
$this.css('overflow','hidden');
shadow = $('<div></div>').css({
position: 'absolute',
'word-wrap': 'break-word',
top: -10000,
left: -10000,
width: $this.width(),
fontSize: $this.css('fontSize'),
fontFamily: $this.css('fontFamily'),
lineHeight: $this.css('lineHeight'),
resize: 'none'
}).appendTo(document.body);
update = function () {
shadow.css('width', $(this).width());
var val = this.value.replace(/&/g, '&')
.replace(/</g, '<')
.replace(/>/g, '>')
.replace(/\n/g, '<br/>')
.replace(/\s/g,' ');
if (val.indexOf('<br/>', val.length - 5) !== -1) { val += '#'; }
shadow.html(val);
$(this).css('height', Math.max(shadow.height(), minHeight));
};
$this.change(update).keyup(update).keydown(update);
update.apply(this);
});
return this;
};
}(jQuery));
Use the border-
class from Boostrap 4
<td class="border-0"></td>
or
<table class='table border-0'></table>
Be sure to end the class input with the last change you want to do.
To fully comply with RSpec ~> 3.1 syntax and rubocop-rspec
's default option for rule RSpec/MessageSpies
, here's what you can do with spy
:
Message expectations put an example's expectation at the start, before you've invoked the code-under-test. Many developers prefer using an arrange-act-assert (or given-when-then) pattern for structuring tests. Spies are an alternate type of test double that support this pattern by allowing you to expect that a message has been received after the fact, using have_received.
# arrange.
invitation = spy('invitation')
# act.
invitation.deliver("[email protected]")
# assert.
expect(invitation).to have_received(:deliver).with("[email protected]")
If you don't use rubocop-rspec or using non-default option. You may, of course, use RSpec 3 default with expect.
dbl = double("Some Collaborator")
expect(dbl).to receive(:foo).with("[email protected]")
I had a form with 11 submit buttons on it, and it would always use the first submit button when the user pressed enter. I read elsewhere that it is not a good idea (bad practice) to have more than one submit button on a form, and the best way to do this is have the button you want as default, as the only submit button on the form. The other buttons should be made into "TYPE=BUTTON" and an onClick event added that calls your own submit routine in Javascript. Something like this :-
<SCRIPT Language="JavaScript">
function validform()
{
// do whatever you need to validate the form, and return true or false accordingly
}
function mjsubmit()
{
if (validform()) { document.form1.submit(); return true;}
return false;
}
</SCRIPT>
<INPUT TYPE=BUTTON NAME="button1" VALUE="button1" onClick="document.form1.submitvalue='button1'; return mjsubmit();">
<INPUT TYPE=BUTTON NAME="button2" VALUE="button2" onClick="document.form1.submitvalue='button2'; return mjsubmit();">
<INPUT TYPE=SUBMIT NAME="button3" VALUE="button3" onClick="document.form1.submitvalue='button3'; return validform();">
<INPUT TYPE=BUTTON NAME="button4" VALUE="button4" onClick="document.form1.submitvalue='button4'; return mjsubmit();">
Here, button3 is the default, and although you are programmatically submitting the form with the other buttons, the mjsubmit routine validates them. HTH.
If your team uses descriptive commit messages (eg. "Ticket #12345 - Update dependencies") on this project, then generating changelog since the latest tag can de done like this:
git log --no-merges --pretty=format:"%s" 'old-tag^'...new-tag > /path/to/changelog.md
--no-merges
omits the merge commits from the listold-tag^
refers to the previous commit earlier than the tagged one. Useful if you want to see the tagged commit at the bottom of the list by any reason. (Single quotes needed only for iTerm on mac OS).I faced same error. I reverted the commit version while creating patch. it worked as earlier patch was in reverse way.
[mrdubey@SNF]$ git log 65f1d63 commit 65f1d6396315853f2b7070e0e6d99b116ba2b018 Author: Dubey Mritunjaykumar
commit e377ab50081e3a8515a75a3f757d7c5c98a975c6 Author: Dubey Mritunjaykumar Date: Mon Jan 21 23:05:48 2019 +0530
Earlier commad used: git diff new_commit_id..prev_commit_id > 1 diff
Got error: patch failed: filename:40
working one: git diff prev_commit_id..latest_commit_id > 1.diff
With the names itself we can easily identify one from
Exception
and other one is fromError
.
Exception: Exceptions occurs during the execution of program. A programmer can handle these exception by try catch block. We have two types of exceptions. Checked exception which throws at compile time. Runtime Exceptions which are thrown at run time, these exception usually happen because of bad programming.
Error: These are not exceptions at all, it is beyond the scope of programmer. These errors are usually thrown by JVM.
Difference:
ClassNotFoundException:
ClassNotFoundException
.ClassNotFoundException
is a checked Exception derived directly from java.lang.Exception
class and you need to provide explicit handling for it ClassNotFoundException
comes up when there is an explicit loading of class is involved by providing name of class at runtime using ClassLoader.loadClass(), Class.forName() and ClassLoader.findSystemClass().NoClassDefFoundError:
NoClassDefFoundError
. NoClassDefFoundError
is an Error derived from LinkageError
class, which is used to indicate error cases, where a class has a dependency on some other class and that class has incompatibly changed after the compilation. NoClassDefFoundError
is a result of implicit loading of class because of a method call from that class or any variable access.Similarities:
NoClassDefFoundError
and ClassNotFoundException
are related to unavailability of a class at run-time. ClassNotFoundException
and NoClassDefFoundError
are related to Java classpath.If you want all of our navigation controllers to respect the top view controller you can use a category so you don't have to go through and change a bunch of class names.
@implementation UINavigationController (Rotation_IOS6)
-(BOOL)shouldAutorotate
{
return [[self.viewControllers lastObject] shouldAutorotate];
}
-(NSUInteger)supportedInterfaceOrientations
{
return [[self.viewControllers lastObject] supportedInterfaceOrientations];
}
- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation
{
return [[self.viewControllers lastObject] preferredInterfaceOrientationForPresentation];
}
@end
As a few of the comments point to, this is a quick fix to the problem. A better solution is subclass UINavigationController and put these methods there. A subclass also helps for supporting 6 and 7.
Number (2) is possible by using a socket implementation (like websocket, socket.io, etc.) with a custom heartbeat for each session the user is engaged in. If a user attempts to open another window, you have a javascript handler check with the server if it's ok, and then respond with an error messages.
However, a better solution is to synchronize the two sessions if possible like in google docs.
x^y
is not "x
to the power of y
". It's "x
XOR y
".
Seems like you can't iterate through JSONArray
with a for each
. You can loop through your JSONArray
like this:
for (int i=0; i < arr.length(); i++) {
arr.getJSONObject(i);
}
I had the same problem, and want to let you know that none of the above worked for me. What worked for me was:
Intent dialogIntent = new Intent(this, myActivity.class);
dialogIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
this.startActivity(dialogIntent);
and in one my subclasses, stored in a separate file I had to:
public static Service myService;
myService = this;
new SubService(myService);
Intent dialogIntent = new Intent(myService, myActivity.class);
dialogIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
myService.startActivity(dialogIntent);
All the other answers gave me a nullpointerexception
.
git branch -D <name-of-branch>
git branch -D -r origin/<name-of-branch>
git push origin :<name-of-branch>
One scenario where your git repo will get seriously bigger with each commit is one where you are committing binary files that you generate regularly. Their storage won't be as efficient than text file.
Another is one where you have a huge number of files within one repo (which is a limit of git) instead of several subrepos (managed as submodules).
In this article on git space, AlBlue mentions:
Note that Git (and Hg, and other DVCSs) do suffer from a problem where (large) binaries are checked in, then deleted, as they'll still show up in the repository and take up space, even if they're not current.
If you have large binaries stored in your git repo, you may consider:
git filter-branch
(warning: this will rewrite the history, which is bad if you have already pushed your repo and if other have pulled from it)As I mentioned in "What are the file limits in Git (number and size)?", the more recent (2015, 5 years after this answer) Git LFS from GitHub is a way to manage those large files (by storing them outside the Git repository).
I faced similar issue due to local vs remote referencing
<script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.4.3/angular.js"></script>
<script src="lib/js/ui-grid/3.0.7/ui-grid.js"></script>
As ui-grid.js is dependent on angular.js, ui-grid requires angular.js by the time its loaded. But in the above case, ui-grid.js [locally saved reference file] is loaded before angularjs was loaded [from internet],
The problem was solved if I had both angular.js and ui-grid referenced locally and as well declaring angular.js before ui-grid
<script src="lib/js/angularjs/1.4.3/angular.js"></script>
<script src="lib/js/ui-grid/3.0.7/ui-grid.js"></script>
Uri is wrong, there is a way to add parameters to main method in Eclipse directly, however the parameters won't be very flexible (some dynamic parameters are allowed). Here's what you need to do:
Run -> Run configurations...
Java Application
or by typing its name to filter box.Program arguments
box. Just in case it isn't clear, they're whitespace-separated so "a b c"
(without quotes) would mean you'd pass arguments a, b and c to your program.I do however recommend using JUnit/wrapper class just like Uri did say since that way you get a lot better control over the actual parameters than by doing this.
It's just a 'safety' warning. It is a relatively common idiom, but also a relatively common error when you meant to have ==
in there. You can make the warning go away by adding another set of parentheses:
while ((list = list->next))
Just with the above answer I hope it was the problem.
$_POST['search']
instead of $_post['search']
And again use LIKE '%$name%'
instead of LIKE '%{$name}%'
This is taken from the Python docs:
Identifiers (also referred to as names) are described by the following lexical definitions:
identifier ::= (letter|"_") (letter | digit | "_")*
letter ::= lowercase | uppercase
lowercase ::= "a"..."z"
uppercase ::= "A"..."Z"
digit ::= "0"..."9"
Identifiers are unlimited in length. Case is significant.
That should explain how to name your variables.
./mysql -u <username> -p <password> -h <host-name like localhost> <database-name> < db_dump-file
In the following line.
temp.Response = db.Responses.Where(y => y.ResponseId.Equals(item.ResponseId)).First();
You are calling First but the collection returned from db.Responses.Where is empty.
For future questions, It's also possible to do it by using float
property and clearing it in each 3 elements.
Here's an example I've made.
.grid {_x000D_
display: inline-block;_x000D_
}_x000D_
_x000D_
.cell {_x000D_
display: inline-block;_x000D_
position: relative;_x000D_
float: left;_x000D_
margin: 8px;_x000D_
width: 48px;_x000D_
height: 48px;_x000D_
background-color: #bdbdbd;_x000D_
font-family: 'Helvetica', 'Arial', sans-serif;_x000D_
font-size: 14px;_x000D_
font-weight: 400;_x000D_
line-height: 20px;_x000D_
text-indent: 4px;_x000D_
color: #fff;_x000D_
}_x000D_
_x000D_
.cell:nth-child(3n) + .cell {_x000D_
clear: both;_x000D_
}
_x000D_
<div class="grid">_x000D_
<div class="cell">1</div>_x000D_
<div class="cell">2</div>_x000D_
<div class="cell">3</div>_x000D_
<div class="cell">4</div>_x000D_
<div class="cell">5</div>_x000D_
<div class="cell">6</div>_x000D_
<div class="cell">7</div>_x000D_
<div class="cell">8</div>_x000D_
<div class="cell">9</div>_x000D_
<div class="cell">10</div>_x000D_
</div>
_x000D_
$(element).prop('disabled', true); //true|disabled will work on all
$(element).attr('disabled', true);
element.disabled = true;
element.setAttribute('disabled', true);
All of the above are perfectly valid solutions. Choose the one that fits your needs best.
You want:
git rm --cached [file]
If you omit the --cached
option, it will also delete it from the working tree. git rm
is slightly safer than git reset
, because you'll be warned if the staged content doesn't match either the tip of the branch or the file on disk. (If it doesn't, you have to add --force
.)
I had this problem, the solution was to look at the commit graph (using gitk) and see that I had the following:
* commit I want to cherry-pick (x)
|\
| * branch I want to cherry-pick to (y)
* |
|/
* common parent (x)
I understand now that I want to do
git cherry-pick -m 2 mycommitsha
This is because -m 1
would merge based on the common parent where as -m 2
merges based on branch y, that is the one I want to cherry-pick to.
An alternative solution, which is portable and with higher precision, available since C++11, is to use std::chrono
.
Here is an example:
#include <iostream>
#include <chrono>
typedef std::chrono::high_resolution_clock Clock;
int main()
{
auto t1 = Clock::now();
auto t2 = Clock::now();
std::cout << "Delta t2-t1: "
<< std::chrono::duration_cast<std::chrono::nanoseconds>(t2 - t1).count()
<< " nanoseconds" << std::endl;
}
Running this on ideone.com gave me:
Delta t2-t1: 282 nanoseconds
In addition to @Cinn's answer, you can define a class like this
class MyAppBar extends AppBar with PreferredSizeWidget {
@override
get preferredSize => Size.fromHeight(50);
MyAppBar({Key key, Widget title}) : super(
key: key,
title: title,
// maybe other AppBar properties
);
}
or this way
class MyAppBar extends PreferredSize {
MyAppBar({Key key, Widget title}) : super(
key: key,
preferredSize: Size.fromHeight(50),
child: AppBar(
title: title,
// maybe other AppBar properties
),
);
}
and then use it instead of standard one
Use pandas!
import datetime
# BDay is business day, not birthday...
from pandas.tseries.offsets import BDay
today = datetime.datetime.today()
print(today - BDay(4))
Since today is Thursday, Sept 26, that will give you an output of:
datetime.datetime(2013, 9, 20, 14, 8, 4, 89761)
you have to do like this...
if not "A%1" == "A"
if the input argument %1 is null, your code will have problem.
Following Joe's example value above, I'd use the modulus arithmetic operator, thusly:
td = datetime.timedelta(hours=10.56)
td_str = "%d:%d" % (td.seconds/3600, td.seconds%3600/60)
Note that integer division in Python rounds down by default; if you want to be more explicit, use math.floor() or math.ceil() as appropriate.
I have a single form and display where I "add / delete / edit / insert / move" data records using one form and one submit button. What I do first is to check to see if the $_post is set, if not, set it to nothing. then I run through the rest of the code,
then on the actual $_post's I use switches and if / else's based on the data entered and with error checking for each data part required for which function is being used.
After it does whatever to the data, I run a function to clear all the $_post data for each section. you can hit refresh till your blue in the face it won't do anything but refresh the page and display.
So you just need to think logically and make it idiot proof for your users...
You need to specify the precision of your output preceded by a colon immediately before the final closing brace. Since the output is not numeric, the precision is zero, so you need this-
:0}
if re.search(r'pattern', string):
Simple if-test:
if re.search(r'ing\b', "seeking a great perhaps"): # any words end with ing?
print("yes")
Pattern check, extract a substring, case insensitive:
match_object = re.search(r'^OUGHT (.*) BE$', "ought to be", flags=re.IGNORECASE)
if match_object:
assert "to" == match_object.group(1) # what's between ought and be?
Notes:
Use re.search()
not re.match. Match restricts to the start of strings, a confusing convention if you ask me. If you do want a string-starting match, use caret or \A
instead, re.search(r'^...', ...)
Use raw string syntax r'pattern'
for the first parameter. Otherwise you would need to double up backslashes, as in re.search('ing\\b', ...)
In this example, \b
is a special sequence meaning word-boundary in regex. Not to be confused with backspace.
re.search()
returns None
if it doesn't find anything, which is always falsy.
re.search()
returns a Match object if it finds anything, which is always truthy.
a group is what matched inside parentheses
group numbering starts at 1
A new feature added in 12cR2 is the ON OVERFLOW
clause of LISTAGG
.
The query including this clause would look like:
SELECT pid, LISTAGG(Desc, ' ' ON OVERFLOW TRUNCATE ) WITHIN GROUP (ORDER BY seq) AS desc
FROM B GROUP BY pid;
The above will restrict the output to 4000 characters but will not throw the ORA-01489
error.
These are some of the additional options of ON OVERFLOW
clause:
ON OVERFLOW TRUNCATE 'Contd..'
: This will display 'Contd..'
at
the end of string (Default is ...
)ON OVERFLOW TRUNCATE ''
: This will display the 4000 characters
without any terminating string.ON OVERFLOW TRUNCATE WITH COUNT
: This will display the total
number of characters at the end after the terminating characters.
Eg:- '...(5512)
'ON OVERFLOW ERROR
: If you expect the LISTAGG
to fail with the
ORA-01489
error ( Which is default anyway ).You could store your JSON inside of an array and then insert the JSON data into the array with push
Check this out https://jsfiddle.net/cx2rk40e/2/
$(document).ready(function(){
// using jQuery just to load function but will work without library.
$( "button" ).on( "click", go );
// Array of JSON we will append too.
var jsonTest = [{
"colour": "blue",
"link": "http1"
}]
// Appends JSON to array with push. Then displays the data in alert.
function go() {
jsonTest.push({"colour":"red", "link":"http2"});
alert(JSON.stringify(jsonTest));
}
});
Result of JSON.stringify(jsonTest)
[{"colour":"blue","link":"http1"},{"colour":"red","link":"http2"}]
This answer maybe useful to users who wish to emulate a similar result.
Since .NET Framework 3.5 there is also a HashSet<T>
which provides all the pros of the Dictionary<TKey, TValue>
if you need only the keys and no values.
So if you use a Dictionary<MyType, object>
and always set the value to null
to simulate the type safe hash table you should maybe consider switching to the HashSet<T>
.
List.clear
would remove the elements without reducing the capacity of the list.
groovy:000> mylist = [1,2,3,4,5,6,7,8,9,10,11,12]
===> [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]
groovy:000> mylist.elementData.length
===> 12
groovy:000> mylist.elementData
===> [Ljava.lang.Object;@19d6af
groovy:000> mylist.clear()
===> null
groovy:000> mylist.elementData.length
===> 12
groovy:000> mylist.elementData
===> [Ljava.lang.Object;@19d6af
groovy:000> mylist = new ArrayList();
===> []
groovy:000> mylist.elementData
===> [Ljava.lang.Object;@2bfdff
groovy:000> mylist.elementData.length
===> 10
Here mylist got cleared, the references to the elements held by it got nulled out, but it keeps the same backing array. Then mylist was reinitialized and got a new backing array, the old one got GCed. So one way holds onto memory, the other one throws out its memory and gets reallocated from scratch (with the default capacity). Which is better depends on whether you want to reduce garbage-collection churn or minimize the current amount of unused memory. Whether the list sticks around long enough to be moved out of Eden might be a factor in deciding which is faster (because that might make garbage-collecting it more expensive).
I'm not sure it's your shape but it's close - you can play with the values:
#wave {_x000D_
position: relative;_x000D_
height: 70px;_x000D_
width: 600px;_x000D_
background: #e0efe3;_x000D_
}_x000D_
#wave:before {_x000D_
content: "";_x000D_
display: block;_x000D_
position: absolute;_x000D_
border-radius: 100% 50%;_x000D_
width: 340px;_x000D_
height: 80px;_x000D_
background-color: white;_x000D_
right: -5px;_x000D_
top: 40px;_x000D_
}_x000D_
#wave:after {_x000D_
content: "";_x000D_
display: block;_x000D_
position: absolute;_x000D_
border-radius: 100% 50%;_x000D_
width: 300px;_x000D_
height: 70px;_x000D_
background-color: #e0efe3;_x000D_
left: 0;_x000D_
top: 27px;_x000D_
}
_x000D_
<div id="wave"></div>
_x000D_
NSTimeInterval seconds; // assume this exists
NSDate* ts_utc = [NSDate dateWithTimeIntervalSince1970:seconds];
NSDateFormatter* df_utc = [[[NSDateFormatter alloc] init] autorelease];
[df_utc setTimeZone:[NSTimeZone timeZoneWithName:@"UTC"]];
[df_utc setDateFormat:@"yyyy.MM.dd G 'at' HH:mm:ss zzz"];
NSDateFormatter* df_local = [[[NSDateFormatter alloc] init] autorelease];
[df_local setTimeZone:[NSTimeZone timeZoneWithName:@"EST"]];
[df_local setDateFormat:@"yyyy.MM.dd G 'at' HH:mm:ss zzz"];
NSString* ts_utc_string = [df_utc stringFromDate:ts_utc];
NSString* ts_local_string = [df_local stringFromDate:ts_utc];
// you can also use NSDateFormatter dateFromString to go the opposite way
Table of formatting string parameters:
https://waracle.com/iphone-nsdateformatter-date-formatting-table/
If performance is a priority, you may want to consider using strftime
The problem in your code is that you can't store the memory address of a local variable (local to a function, for example) in a globlar variable:
RectInvoice rect(vect,im,x, y, w ,h);
this->rectInvoiceVector.push_back(&rect);
There, &rect
is a temporary address (stored in the function's activation registry) and will be destroyed when that function end.
The code should create a dynamic variable:
RectInvoice *rect = new RectInvoice(vect,im,x, y, w ,h);
this->rectInvoiceVector.push_back(rect);
There you are using a heap address that will not be destroyed in the end of the function's execution. Tell me if it worked for you.
Cheers
Both Nick and Adam's answers work really well.
I'd like to add a note if you want to allow latin characters like á
and ç
as I wanted to do:
jQuery.validator.addMethod('lettersonly', function(value, element) {
return this.optional(element) || /^[a-z áãâäàéêëèíîïìóõôöòúûüùçñ]+$/i.test(value);
}, "Letters and spaces only please");
I use the following way to handle the many-to-many relationship where only foreign keys are involved.
So for inserting:
public void InsertStudentClass (long studentId, long classId)
{
using (var context = new DatabaseContext())
{
Student student = new Student { StudentID = studentId };
context.Students.Add(student);
context.Students.Attach(student);
Class class = new Class { ClassID = classId };
context.Classes.Add(class);
context.Classes.Attach(class);
student.Classes = new List<Class>();
student.Classes.Add(class);
context.SaveChanges();
}
}
For deleting,
public void DeleteStudentClass(long studentId, long classId)
{
Student student = context.Students.Include(x => x.Classes).Single(x => x.StudentID == studentId);
using (var context = new DatabaseContext())
{
context.Students.Attach(student);
Class classToDelete = student.Classes.Find(x => x.ClassID == classId);
if (classToDelete != null)
{
student.Classes.Remove(classToDelete);
context.SaveChanges();
}
}
}
var maxchar = 10;_x000D_
$('#message').after('<span id="count" class="counter"></span>');_x000D_
$('#count').html(maxchar+' of '+maxchar);_x000D_
$('#message').attr('maxlength', maxchar);_x000D_
$('#message').parent().addClass('wrap-text');_x000D_
$('#message').on("keydown", function(e){_x000D_
var len = $('#message').val().length;_x000D_
if (len >= maxchar && e.keyCode != 8)_x000D_
e.preventDefault();_x000D_
else if(len <= maxchar && e.keyCode == 8){_x000D_
if(len <= maxchar && len != 0)_x000D_
$('#count').html(maxchar+' of '+(maxchar - len +1));_x000D_
else if(len == 0)_x000D_
$('#count').html(maxchar+' of '+(maxchar - len));_x000D_
}else_x000D_
$('#count').html(maxchar+' of '+(maxchar - len-1)); _x000D_
})
_x000D_
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>_x000D_
<textarea id="message" name="text"></textarea>
_x000D_
In the app build.gradle
dependency, you must add the following code
classpath 'com.google.gms:google-services:$last_version'
And then please check the Google Play Service SDK tools installing status.
.communicate()
writes input (there is no input in this case so it just closes subprocess' stdin to indicate to the subprocess that there is no more input), reads all output, and waits for the subprocess to exit.
The exception EOFError is raised in the child process by raw_input()
(it expected data but got EOF (no data)).
p.stdout.read()
hangs forever because it tries to read all output from the child at the same time as the child waits for input (raw_input()
) that causes a deadlock.
To avoid the deadlock you need to read/write asynchronously (e.g., by using threads or select) or to know exactly when and how much to read/write, for example:
from subprocess import PIPE, Popen
p = Popen(["python", "-u", "1st.py"], stdin=PIPE, stdout=PIPE, bufsize=1)
print p.stdout.readline(), # read the first line
for i in range(10): # repeat several times to show that it works
print >>p.stdin, i # write input
p.stdin.flush() # not necessary in this case
print p.stdout.readline(), # read output
print p.communicate("n\n")[0], # signal the child to exit,
# read the rest of the output,
# wait for the child to exit
Note: it is a very fragile code if read/write are not in sync; it deadlocks.
Beware of block-buffering issue (here it is solved by using "-u" flag that turns off buffering for stdin, stdout in the child).
I think a lot of people concentrate on the fact that this value is nullable, and don't think about what they actually want :)
bool? nullableBool = true;
if (nullableBool == true) { ... } // true
else { ... } // false or null
Or if you want more options...
bool? nullableBool = true;
if (nullableBool == true) { ... } // true
else if (nullableBool == false) { ... } // false
else { ... } // null
(nullableBool == true)
will never return true if the bool? is null :P
document.getElementById('table1').rows[0].cells.length
cells is not a property of a table, rows are. Cells is a property of a row though
Disclaimer: While the top answer is probably a better solution, as a beginner it's a lot to take in when all you want is something very simple. This is intended as a more direct answer to your original question "How can I select certain elements in React"
I think the confusion in your question is because you have React components which you are being passed the id "Progress1", "Progress2" etc. I believe this is not setting the html attribute 'id', but the React component property. e.g.
class ProgressBar extends React.Component {
constructor(props) {
super(props)
this.state = {
id: this.props.id <--- ID set from <ProgressBar id="Progress1"/>
}
}
}
As mentioned in some of the answers above you absolutely can use document.querySelector
inside of your React app, but you have to be clear that it is selecting the html output of your components' render methods. So assuming your render output looks like this:
render () {
const id = this.state.id
return (<div id={"progress-bar-" + id}></div>)
}
Then you can elsewhere do a normal javascript querySelector call like this:
let element = document.querySelector('#progress-bar-Progress1')
Try this one:
onsubmit="return f(this.'yourfieldname'.value);"
I hope this will help you.
I had a similar issue when I tried to get a pull with a single quote ' in it's name.
I had to escape the pull request name:
git pull https://github.com/foo/bar namewithsingle"'"quote
PYTHON 3
import urllib.request
wp = urllib.request.urlopen("http://example.com")
pw = wp.read()
print(pw)
PYTHON 2
import urllib
import sys
wp = urllib.urlopen("http://example.com")
for line in wp:
sys.stdout.write(line)
While I have tested both the Codes in respective versions.
Set id for the textbox. ie,
<input type="text" name="txtJob" value="software engineer" id="txtJob">
In javascript
var jobValue = document.getElementById('txtJob').value
In Jquery
var jobValue = $("#txtJob").val();
It's a separate statement.
It's also not possible to insert into a table and select from it and build an index in the same statement either.
The BOL entry contains the information you need:
CLUSTERED | NONCLUSTERED
Indicate that a clustered or a nonclustered index is created for the PRIMARY KEY or UNIQUE constraint. PRIMARY KEY constraints default to CLUSTERED, and UNIQUE constraints default to NONCLUSTERED.In a CREATE TABLE statement, CLUSTERED can be specified for only one constraint. If CLUSTERED is specified for a UNIQUE constraint and a PRIMARY KEY constraint is also specified, the PRIMARY KEY defaults to NONCLUSTERED.
You can create an index on a PK field, but not a non-clustered index on a non-pk non-unique-constrained field.
A NCL index is not relevant to the structure of the table, and is not a constraint on the data inside the table. It's a separate entity that supports the table but is not integral to it's functionality or design.
That's why it's a separate statement. The NCL index is irrelevant to the table from a design perspective (query optimization notwithstanding).
After trying out the other solutions and still not getting it to work, I found out what the problem was in my case. I changed contentType from "application/json" to "text/plain".
$.ajax(fullUrl, {
type: "GET",
contentType: "text/plain",
xhrFields: {
withCredentials: true
},
crossDomain: true
});
Value of string::npos is 18446744073709551615. Its a value returned if there is no string found.
Use the menu item Settings>Preferences.
On the MISC tab of the resulting dialog, uncheck "Remember current session for next launch."
I was also facing the same issue after updating to Angular 1.6.7 but when I looked into the code, error was thrown for $interval.cancel(interval);
for my case
My issue got resolved once I updated angular-mocks
to latest version(1.7.0).
You can simply convert the given number using Number primitive type in JavaScript as shown below.
var c = Number(first) + Number(second);
What about using:
mime_body_part.setHeader("Content-Type", "text/html");
In the documentation of getContentType it says that the value returned is found using getHeader(name). So if you set the header using setHeader I guess everything should be fine.
Here is a function that will do that.
CREATE FUNCTION count_str(haystack TEXT, needle VARCHAR(32))
RETURNS INTEGER DETERMINISTIC
BEGIN
RETURN ROUND((CHAR_LENGTH(haystack) - CHAR_LENGTH(REPLACE(haystack, needle, ""))) / CHAR_LENGTH(needle));
END;