This will change your current working directory to so that opening relative paths will work:
import os
os.chdir("/home/udi/foo")
However, you asked how to change into whatever directory your Python script is located, even if you don't know what directory that will be when you're writing your script. To do this, you can use the os.path
functions:
import os
abspath = os.path.abspath(__file__)
dname = os.path.dirname(abspath)
os.chdir(dname)
This takes the filename of your script, converts it to an absolute path, then extracts the directory of that path, then changes into that directory.
Here's what I use at the top of all my batch files. I just copy/paste from my template folder.
@echo off
:: --HAS ENDING BACKSLASH
set batdir=%~dp0
:: --MISSING ENDING BACKSLASH
:: set batdir=%CD%
pushd "%batdir%"
Setting current batch file's path to %batdir% allows you to call it in subsequent stmts in current batch file, regardless of where this batch file changes to. Using PUSHD allows you to use POPD to quickly set this batch file's path to original %batdir%. Remember, if using %batdir%ExtraDir or %batdir%\ExtraDir (depending on which version used above, ending backslash or not) you will need to enclose the entire string in double quotes if path has spaces (i.e. "%batdir%ExtraDir"). You can always use PUSHD %~dp0. [https: // ss64.com/ nt/ syntax-args .html] has more on (%~) parameters.
Note that using (::) at beginning of a line makes it a comment line. More importantly, using :: allows you to include redirectors, pipes, special chars (i.e. < > | etc) in that comment.
:: ORIG STMT WAS: dir *.* | find /v "1917" > outfile.txt
Of course, Powershell does this and lots more.
update 2018/03/05 finnaly I use this:
shellPath=`echo $PWD/``echo ${0%/*}`
# process absolute path
shellPath1=`echo $PWD/`
shellPath2=`echo ${0%/*}`
if [ ${shellPath2:0:1} == '/' ] ; then
shellPath=${shellPath2}
fi
It can be executed correct in relative path or absolute path. Executed correct invoked by crontab. Executed correct in other shell.
show example, a.sh print self path.
[root@izbp1a7wyzv7b5hitowq2yz /]# more /root/test/a.sh
shellPath=`echo $PWD/``echo ${0%/*}`
# process absolute path
shellPath1=`echo $PWD/`
shellPath2=`echo ${0%/*}`
if [ ${shellPath2:0:1} == '/' ] ; then
shellPath=${shellPath2}
fi
echo $shellPath
[root@izbp1a7wyzv7b5hitowq2yz /]# more /root/b.sh
shellPath=`echo $PWD/``echo ${0%/*}`
# process absolute path
shellPath1=`echo $PWD/`
shellPath2=`echo ${0%/*}`
if [ ${shellPath2:0:1} == '/' ] ; then
shellPath=${shellPath2}
fi
$shellPath/test/a.sh
[root@izbp1a7wyzv7b5hitowq2yz /]# ~/b.sh
/root/test
[root@izbp1a7wyzv7b5hitowq2yz /]# /root/b.sh
/root/test
[root@izbp1a7wyzv7b5hitowq2yz /]# cd ~
[root@izbp1a7wyzv7b5hitowq2yz ~]# ./b.sh
/root/./test
[root@izbp1a7wyzv7b5hitowq2yz ~]# test/a.sh
/root/test
[root@izbp1a7wyzv7b5hitowq2yz ~]# cd test
[root@izbp1a7wyzv7b5hitowq2yz test]# ./a.sh
/root/test/.
[root@izbp1a7wyzv7b5hitowq2yz test]# cd /
[root@izbp1a7wyzv7b5hitowq2yz /]# /root/test/a.sh
/root/test
[root@izbp1a7wyzv7b5hitowq2yz /]#
old: I use this:
MAKEFILE_PATH := $(PWD)/$({0%/*})
It can show correct if executed in other shell and other directory.
Perhaps this is what you are looking for:
import os
os.chdir(default_path)
There is a way to do this using the system property "user.dir". The key part to understand is that getAbsoluteFile() must be called (as shown below) or else relative paths will be resolved against the default "user.dir" value.
import java.io.*;
public class FileUtils
{
public static boolean setCurrentDirectory(String directory_name)
{
boolean result = false; // Boolean indicating whether directory was set
File directory; // Desired current working directory
directory = new File(directory_name).getAbsoluteFile();
if (directory.exists() || directory.mkdirs())
{
result = (System.setProperty("user.dir", directory.getAbsolutePath()) != null);
}
return result;
}
public static PrintWriter openOutputFile(String file_name)
{
PrintWriter output = null; // File to open for writing
try
{
output = new PrintWriter(new File(file_name).getAbsoluteFile());
}
catch (Exception exception) {}
return output;
}
public static void main(String[] args) throws Exception
{
FileUtils.openOutputFile("DefaultDirectoryFile.txt");
FileUtils.setCurrentDirectory("NewCurrentDirectory");
FileUtils.openOutputFile("CurrentDirectoryFile.txt");
}
}
Look up the man page for getcwd
.
I know it is very late at the day to throw an answer at this one but I found that none of the answers were as useful to me as my own solution. A very simple way to get the path from your CWD to your bin folder is like this:
int main(int argc, char* argv[])
{
std::string argv_str(argv[0]);
std::string base = argv_str.substr(0, argv_str.find_last_of("/"));
}
You can now just use this as a base for your relative path. So for example I have this directory structure:
main
----> test
----> src
----> bin
and I want to compile my source code to bin and write a log to test I can just add this line to my code.
std::string pathToWrite = base + "/../test/test.log";
I have tried this approach on Linux using full path, alias etc. and it works just fine.
NOTE:
If you are on windows you should use a '\' as the file separator not '/'. You will have to escape this too for example:
std::string base = argv[0].substr(0, argv[0].find_last_of("\\"));
I think this should work but haven't tested, so comment would be appreciated if it works or a fix if not.
Something like this should work:
sh -c 'cd /tmp && exec pwd'
Use cd
in a subshell; the shorthand way to use this kind of subshell is parentheses.
(cd wherever; mycommand ...)
That said, if your command has an environment that it requires, it should really ensure that environment itself instead of putting the onus on anything that might want to use it (unless it's an internal command used in very specific circumstances in the context of a well defined larger system, such that any caller already needs to ensure the environment it requires). Usually this would be some kind of shell script wrapper.
I understand this is outdated, but I couldn't get the former answers to work very satisfactorily, so I wanted to contribute my method in case any one else encounters the same error mentioned in the comments to BumbleBee's answer.
Mine is based on a simple system command. All you feed the function is the name of your script:
extractRootDir <- function(x) {
abs <- suppressWarnings(system(paste("find ./ -name",x), wait=T, intern=T, ignore.stderr=T))[1];
path <- paste("~",substr(abs, 3, length(strsplit(abs,"")[[1]])),sep="");
ret <- gsub(x, "", path);
return(ret);
}
setwd(extractRootDir("myScript.R"));
The output from the function would look like "/Users/you/Path/To/Script"
. Hope this helps anyone else who may have gotten stuck.
Dir.pwd
seems to do the trick.
Most answers get you the current path and are context sensitive. In order to run your script from any directory, use the below snippet.
DIR="$( cd "$( dirname "$0" )" && pwd )"
By switching directories in a subshell, we can then call pwd
and get the correct path of the script regardless of context.
You can then use $DIR
as "$DIR/path/to/file"
File currentDirectory = new File(new File(".").getAbsolutePath());
System.out.println(currentDirectory.getCanonicalPath());
System.out.println(currentDirectory.getAbsolutePath());
Prints something like:
/path/to/current/directory
/path/to/current/directory/.
Note that File.getCanonicalPath()
throws a checked IOException but it will remove things like ../../../
It seems that IDLE changes its current working dir to location of the script that is executed, while when running the script using cmd doesn't do that and it leaves CWD as it is.
To change current working dir to the one containing your script you can use:
import os
os.chdir(os.path.dirname(__file__))
print(os.getcwd())
The __file__
variable is available only if you execute script from file, and it contains path to the file. More on it here: Python __file__ attribute absolute or relative?
Instead of using doubles for decimal arithemetic, please use java.math.BigDecimal. It would produce the expected results.
For reference take a look at this stackoverflow question
I have just seen the following:
set mem inaccessible-by-default [on|off]
It might allow you to search without regard if the memory is accessible.
You can check the called
attribute, but if your assertion fails, the next thing you'll want to know is something about the unexpected call, so you may as well arrange for that information to be displayed from the start. Using unittest
, you can check the contents of call_args_list
instead:
self.assertItemsEqual(my_var.call_args_list, [])
When it fails, it gives a message like this:
AssertionError: Element counts were not equal: First has 0, Second has 1: call('first argument', 4)
I solved it by doing like that:
var return_first = (function () {
var tmp = $.ajax({
'type': "POST",
'dataType': 'html',
'url': "ajax.php?first",
'data': { 'request': "", 'target': arrange_url, 'method':
method_target },
'success': function (data) {
tmp = data;
}
}).done(function(data){
return data;
});
return tmp;
});
Since API 17, the View
class has a static method generateViewId()
that will
generate a value suitable for use in setId(int)
Add above code in API gateway under GET-Integration Request> mapping section.
This will also work
SELECT NAME
FROM GEO_LOCATION
WHERE MODIFY_ON BETWEEN SYSDATE() - INTERVAL 2 HOUR AND SYSDATE()
The new Aggregation Framework in MongoDB 2.2+ provides an alternative to Map/Reduce. The $unwind
operator can be used to separate your shapes
array into a stream of documents that can be matched:
db.test.aggregate(
// Start with a $match pipeline which can take advantage of an index and limit documents processed
{ $match : {
"shapes.color": "red"
}},
{ $unwind : "$shapes" },
{ $match : {
"shapes.color": "red"
}}
)
Results in:
{
"result" : [
{
"_id" : ObjectId("504425059b7c9fa7ec92beec"),
"shapes" : {
"shape" : "circle",
"color" : "red"
}
}
],
"ok" : 1
}
This is an old question, but too many examples above are over-complicated.
Keep It Simple: (in Jupyter Notebook or Python 3.7.1 terminal on Windows 10)
import sys
print(sys.executable)```
# example output: >> `C:\Anaconda3\envs\quantecon\python.exe`
OR
```sys.base_prefix```
# Example output: >> 'C:\\Anaconda3\\envs\\quantecon'
Don't double click Project.xcodeproj to start your xcode project. Instead, close your project and open the xcworkspace.
File -> Close Workspace
File -> Open -> Search your project folder for Project.xcworkspace
All my errors are gone.
Signalling a pod on config map update is a feature in the works (https://github.com/kubernetes/kubernetes/issues/22368).
You can always write a custom pid1 that notices the confimap has changed and restarts your app.
You can also eg: mount the same config map in 2 containers, expose a http health check in the second container that fails if the hash of config map contents changes, and shove that as the liveness probe of the first container (because containers in a pod share the same network namespace). The kubelet will restart your first container for you when the probe fails.
Of course if you don't care about which nodes the pods are on, you can simply delete them and the replication controller will "restart" them for you.
Using Jquery and sending the data with ajax, you can solve your problem:
<script>
$('#form_id').submit(function() {
$("#input_disabled_id").prop('disabled', false);
//Rest of code
})
</script>
IMHO the biggest advantage that REST enables is that of reducing client/server coupling. It is much easier to evolve a REST interface over time without breaking existing clients.
According with the HTTP/1.1 standard, the shared IP hosted site can be accessed by a GET request with the IP as URL and a header of the host.
Here there are two examples(wget and curl):
$ wget --header 'Host:somerandomservice.com' http://67.225.235.59
$ curl --header 'Host:somerandomservice.com' http://67.225.235.59
Resources:
https://en.wikipedia.org/wiki/Shared_web_hosting_service
http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.23
DECLARE @CodeNameString varchar(max)
SET @CodeNameString=''
SELECT @CodeNameString=@CodeNameString+CodeName FROM AccountCodes ORDER BY Sort
SELECT @CodeNameString
I found the solution here
I had to create a action filter to override the default behaviour of MVC
Here is my exception class
class ValidationException : ApplicationException
{
public JsonResult exceptionDetails;
public ValidationException(JsonResult exceptionDetails)
{
this.exceptionDetails = exceptionDetails;
}
public ValidationException(string message) : base(message) { }
public ValidationException(string message, Exception inner) : base(message, inner) { }
protected ValidationException(
System.Runtime.Serialization.SerializationInfo info,
System.Runtime.Serialization.StreamingContext context)
: base(info, context) { }
}
Note that I have constructor which initializes my JSON. Here is the action filter
public class HandleUIExceptionAttribute : FilterAttribute, IExceptionFilter
{
public virtual void OnException(ExceptionContext filterContext)
{
if (filterContext == null)
{
throw new ArgumentNullException("filterContext");
}
if (filterContext.Exception != null)
{
filterContext.ExceptionHandled = true;
filterContext.HttpContext.Response.Clear();
filterContext.HttpContext.Response.TrySkipIisCustomErrors = true;
filterContext.HttpContext.Response.StatusCode = (int)System.Net.HttpStatusCode.InternalServerError;
filterContext.Result = ((ValidationException)filterContext.Exception).myJsonError;
}
}
Now that I have the action filter, I will decorate my controller with the filter attribute
[HandleUIException]
public JsonResult UpdateName(string objectToUpdate)
{
var response = myClient.ValidateObject(objectToUpdate);
if (response.errors.Length > 0)
throw new ValidationException(Json(response));
}
When the error is thrown the action filter which implements IExceptionFilter get called and I get back the Json on the client on error callback.
In my case I hade to change from:
plugins {
id 'com.android.application'
id 'kotlin-android'
id 'kotlin-kapt'
**apply plugin :'com.google.gms.google-services'**
}
to
plugins {
id 'com.android.application'
id 'kotlin-android'
id 'kotlin-kapt'
id 'com.google.gms.google-services'
}
Explanation from the Preshing on Programming blog:
It’s handy when you have two related operations which you’d like to execute as a pair, with a block of code in between. The classic example is opening a file, manipulating the file, then closing it:
with open('output.txt', 'w') as f: f.write('Hi there!')
The above with statement will automatically close the file after the nested block of code. (Continue reading to see exactly how the close occurs.) The advantage of using a with statement is that it is guaranteed to close the file no matter how the nested block exits. If an exception occurs before the end of the block, it will close the file before the exception is caught by an outer exception handler. If the nested block were to contain a return statement, or a continue or break statement, the with statement would automatically close the file in those cases, too.
You can change the row height of the Datagridview in the
.cs [Design]
.
Then click the datagridview Properties
.
Look for RowTemplate
and expand it,
then type the value in the Height
.
Just drop them:
nms.dropna(thresh=2)
this will drop all rows where there are at least two non-NaN
.
Then you could then drop where name is NaN
:
In [87]:
nms
Out[87]:
movie name rating
0 thg John 3
1 thg NaN 4
3 mol Graham NaN
4 lob NaN NaN
5 lob NaN NaN
[5 rows x 3 columns]
In [89]:
nms = nms.dropna(thresh=2)
In [90]:
nms[nms.name.notnull()]
Out[90]:
movie name rating
0 thg John 3
3 mol Graham NaN
[2 rows x 3 columns]
EDIT
Actually looking at what you originally want you can do just this without the dropna
call:
nms[nms.name.notnull()]
UPDATE
Looking at this question 3 years later, there is a mistake, firstly thresh
arg looks for at least n
non-NaN
values so in fact the output should be:
In [4]:
nms.dropna(thresh=2)
Out[4]:
movie name rating
0 thg John 3.0
1 thg NaN 4.0
3 mol Graham NaN
It's possible that I was either mistaken 3 years ago or that the version of pandas I was running had a bug, both scenarios are entirely possible.
The AWK solution which also handles file names including colons:
grep -c string * | sed -r 's/^.*://' | awk 'BEGIN{}{x+=$1}END{print x}'
Keep in mind that this method still does not find multiple occurrences of string
on the same line.
First, check if somescript.py
is executable and starts with something along the lines of #!/usr/bin/python
.
If this is done, then you can use subprocess.call('./somescript.py')
.
Or as another answer points out, you could do subprocess.call(['python', 'somescript.py'])
.
I was facing this same issue and initially, I removed the row's right and left -ve margin and it removed the horizontal scroll, but it wasn't good. Then after 45 minutes of inspecting and searching, I found out that I was using container-fluid and was removing the padding and its inner row had left and right negative margins. So I gave container-fluid it's padding back and everything went back to normal.
If you do need to remove container-fluid padding, don't just remove every row's left and right negative margin in your project instead introduce a class and use that on your desired container
A couple of implementations (just an illustration, not intended for use):
def to_int(bin):
x = int(bin, 2)
if bin[0] == '1': # "sign bit", big-endian
x -= 2**len(bin)
return x
def to_int(bin): # from definition
n = 0
for i, b in enumerate(reversed(bin)):
if b == '1':
if i != (len(bin)-1):
n += 2**i
else: # MSB
n -= 2**i
return n
class Person{
private $fname;
private $lname;
public function __construct($fname,$lname){
$this->fname = $fname;
$this->lname = $lname;
}
}
$objPerson1 = new Person('john','smith');
I usually come across this when the port which the server (I use JBoss) is already in use
Usual suspects
To change the port to which JBoss 4.2.x binds itself go to:
"C:\jboss4.2.2\server\default\deploy\jboss-web.deployer\server.xml"
here default is the instance of the server change the port here :
<Connector port="8080" address="${jboss.bind.address}" >
In the above example the port is bound to 8080
i was using the tkinter messagebox but it would crash my code. i didn't want to find out why so i used the ctypes module instead.
for example:
import ctypes
ctypes.windll.user32.MessageBoxW(0, "Your text", "Your title", 1)
i got that code from Arkelis
i liked that it didn't crash the code so i worked on it and added a threading so the code after would run.
example for my code
import ctypes
import threading
def MessageboxThread(buttonstyle, title, text, icon):
threading.Thread(
target=lambda: ctypes.windll.user32.MessageBoxW(buttonstyle, text, title, icon)
).start()
messagebox(0, "Your title", "Your text", 1)
for button styles and icon numbers:
## Button styles:
# 0 : OK
# 1 : OK | Cancel
# 2 : Abort | Retry | Ignore
# 3 : Yes | No | Cancel
# 4 : Yes | No
# 5 : Retry | No
# 6 : Cancel | Try Again | Continue
## To also change icon, add these values to previous number
# 16 Stop-sign icon
# 32 Question-mark icon
# 48 Exclamation-point icon
# 64 Information-sign icon consisting of an 'i' in a circle
The Venn diagrams don't really do it for me.
They don't show any distinction between a cross join and an inner join, for example, or more generally show any distinction between different types of join predicate or provide a framework for reasoning about how they will operate.
There is no substitute for understanding the logical processing and it is relatively straightforward to grasp anyway.
on
clause against all rows from step 1 keeping those where the predicate evaluates to true
(NB: In practice the query optimiser may find more efficient ways of executing the query than the purely logical description above but the final result must be the same)
I'll start off with an animated version of a full outer join. Further explanation follows.
Source Tables
First start with a CROSS JOIN
(AKA Cartesian Product). This does not have an ON
clause and simply returns every combination of rows from the two tables.
SELECT A.Colour, B.Colour FROM A CROSS JOIN B
Inner and Outer joins have an "ON" clause predicate.
SELECT A.Colour, B.Colour FROM A INNER JOIN B ON A.Colour = B.Colour
The above is the classic equi join.
The inner join condition need not necessarily be an equality condition and it need not reference columns from both (or even either) of the tables. Evaluating A.Colour NOT IN ('Green','Blue')
on each row of the cross join returns.
SELECT A.Colour, B.Colour FROM A INNER JOIN B ON 1 =1
The join condition evaluates to true for all rows in the cross join result so this is just the same as a cross join. I won't repeat the picture of the 16 rows again.
Outer Joins are logically evaluated in the same way as inner joins except that if a row from the left table (for a left join) does not join with any rows from the right hand table at all it is preserved in the result with NULL
values for the right hand columns.
This simply restricts the previous result to only return the rows where B.Colour IS NULL
. In this particular case these will be the rows that were preserved as they had no match in the right hand table and the query returns the single red row not matched in table B
. This is known as an anti semi join.
It is important to select a column for the IS NULL
test that is either not nullable or for which the join condition ensures that any NULL
values will be excluded in order for this pattern to work correctly and avoid just bringing back rows which happen to have a NULL
value for that column in addition to the un matched rows.
Right outer joins act similarly to left outer joins except they preserve non matching rows from the right table and null extend the left hand columns.
Full outer joins combine the behaviour of left and right joins and preserve the non matching rows from both the left and the right tables.
No rows in the cross join match the 1=0
predicate. All rows from both sides are preserved using normal outer join rules with NULL in the columns from the table on the other side.
With a minor amend to the preceding query one could simulate a UNION ALL
of the two tables.
Note that the WHERE
clause (if present) logically runs after the join. One common error is to perform a left outer join and then include a WHERE clause with a condition on the right table that ends up excluding the non matching rows. The above ends up performing the outer join...
... And then the "Where" clause runs. NULL= 'Green'
does not evaluate to true so the row preserved by the outer join ends up discarded (along with the blue one) effectively converting the join back to an inner one.
If the intention was to include only rows from B where Colour is Green and all rows from A regardless the correct syntax would be
See these examples run live at SQLFiddle.com.
This will work:
find . -name "*.DS_Store" -type f -exec git-rm {} \;
It deletes all files whose names end with .DS_Store
, including ._.DS_Store
.
Following are some key points :
Conclusion
Why choose between a traditional database and a NoSQL data store? Use both! The problem with NoSQL solutions (beyond the initial learning curve) is the lack of transactions -- you do all updates to MySQL and have MySQL populate a NoSQL data store for reads -- you then benefit from each technology's strengths. This does add more complexity, but you already have the MySQL side -- just add MongoDB, Cassandra, etc to the mix.
NoSQL datastores generally scale way better than a traditional DB for the same otherwise specs -- there is a reason why Facebook, Twitter, Google, and most start-ups are using NoSQL solutions. It's not just geeks getting high on new tech.
Here's the way I do it:
foo <- rnorm(100, mean=1, sd=2)
hist(foo, prob=TRUE)
curve(dnorm(x, mean=mean(foo), sd=sd(foo)), add=TRUE)
A bonus exercise is to do this with ggplot2 package ...
The garbage collector allows your computer to simulate a computer with infinite memory. The rest is just mechanism.
It does this by detecting when chunks of memory are no longer accessible from your code, and returning those chunks to the free store.
EDIT: Yes, the link is for C#, but C# and Java are identical in this regard.
Have a look at this answer:
Storing Images in DB - Yea or Nay?
Essentially, the space and performance hit can be quite big, depending on the number of users. Also, keep in mind that Web servers are cheap and you can easily add more to balance the load, whereas the database is the most expensive and hardest to scale part of a web architecture usually.
There are some opposite examples (e.g., Microsoft Sharepoint), but usually, storing files in the database is not a good idea.
Unless possibly you write desktop apps and/or know roughly how many users you will ever have, but on something as random and unexpectable like a public web site, you may pay a high price for storing files in the database.
An anonymous namespace makes the enclosed variables, functions, classes, etc. available only inside that file. In your example it's a way to avoid global variables. There is no runtime or compile time performance difference.
There isn't so much an advantage or disadvantage aside from "do I want this variable, function, class, etc. to be public or private?"
SELECT *
FROM table
WHERE date BETWEEN
ADDDATE(LAST_DAY(DATE_SUB(NOW(),INTERVAL 2 MONTH)), INTERVAL 1 DAY)
AND DATE_SUB(NOW(),INTERVAL 1 MONTH);
See the docs for info on DATE_SUB
, ADDDATE
, LAST_DAY
and other useful datetime functions.
//javascript function calling an jquery function
//In javascript part
function js_show_score()
{
//we use so many javascript library, So please use 'jQuery' avoid '$'
jQuery(function(){
//Call any jquery function
show_score(); //jquery function
});(jQuery);
}
//In Jquery part
jQuery(function(){
//Jq Score function
function show_score()
{
$('#score').val("10");
}
});(jQuery);
For me just overriding onBackPressed()
did not work but explicit pointing which activity it should start worked well:
@Override
public void onBackPressed(){
Intent intent = new Intent(this, ActivityYouWanToGoBack.class);
startActivity(intent);
}
you can simply add a method (setAttributes, with "s" at the end) to "Element" prototype like:
Element.prototype.setAttributes = function(obj){
for(var prop in obj) {
this.setAttribute(prop, obj[prop])
}
}
you can define it in one line:
Element.prototype.setAttributes = function(obj){ for(var prop in obj) this.setAttribute(prop, obj[prop]) }
and you can call it normally as you call the other methods. The attributes are given as an object:
elem.setAttributes({"src": "http://example.com/something.jpeg", "height": "100%", "width": "100%"})
you can add an if statement to throw an error if the given argument is not an object.
Use the ListView.ItemContainerStyle property to give your ListViewItems an EventSetter that will handle the PreviewMouseLeftButtonDown event. Then, in the handler, check to see if the item that was clicked is selected.
XAML:
<ListView ItemsSource={Binding MyItems}>
<ListView.View>
<GridView>
<!-- declare a GridViewColumn for each property -->
</GridView>
</ListView.View>
<ListView.ItemContainerStyle>
<Style TargetType="ListViewItem">
<EventSetter Event="PreviewMouseLeftButtonDown" Handler="ListViewItem_PreviewMouseLeftButtonDown" />
</Style>
</ListView.ItemContainerStyle>
</ListView>
Code-behind:
private void ListViewItem_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
var item = sender as ListViewItem;
if (item != null && item.IsSelected)
{
//Do your stuff
}
}
We don't stop or kill a thread rather we do Thread.currentThread().isInterrupted().
public class Task1 implements Runnable {
public void run() {
while (!Thread.currentThread().isInterrupted()) {
................
................
................
................
}
}
}
in main we will do like this:
Thread t1 = new Thread(new Task1());
t1.start();
t1.interrupt();
If left an expressions tab in my IDE open which was making a hibernate get call on the object causing this exception. I was trying to delete this same object. Also I had a breakpoint on the delete call which seems to be necessary to get this error to happen. Simply making another expressions tab to be the front tab or changing the setting so that the ide does not stop on breakpoints solved this problem.
Width 100% : It will make content with 100%. margin, border, padding will be added to this width and element will overflow if any of these added.
Width auto : It will fit the element in available space including margin, border and padding. space remaining after adjusting margin + padding + border will be available width/ height.
Width 100% + box-sizing: border box : It will also fits the element in available space including border, padding (margin will make it overflow the container).
Change your selector to
val = j$("#select_2 option:selected").text();
You're selecting the <select>
instead of the <option>
Add 'justified' class to 'ul'.
<ul class="nav navbar-nav justified">
CSS:
.justified {
position:absolute;
left:50%;
}
Now, calculate its 'margin-left' in order to align it to center
.
// calculating margin-left to align it to center;
var width = $('.justified').width();
$('.justified').css('margin-left', '-' + (width / 2)+'px');
public void Test(){
WebElement sign = fc.findElement(By.xpath(".//*[@id='login-scroll']/a"));
sign.click();
WebElement LoginAsGuest=fc.findElement(By.xpath(".//*[@id='guest-login-option']"));
LoginAsGuest.click();
WebElement email_id= fc.findElement(By.xpath(".//*[@id='guestemail']"));
email_id.sendKeys("[email protected]");
WebElement ContinueButton=fc.findElement(By.xpath(".//*[@id='contibutton']"));
ContinueButton.click();
}
That way you haven't installed pip, you installed just the easy_install
i.e. setuptools
.
First you should remove all the packages you installed with easy_install
using (see uninstall):
easy_install -m PackageName
This includes pip
if you installed it using easy_install pip
.
After this you remove the setuptools
following the instructions from here:
If setuptools package is found in your global site-packages directory, you may safely remove the following file/directory:
setuptools-*.egg
If setuptools is installed in some other location such as the user site directory (eg: ~/.local, ~/Library/Python or %APPDATA%), then you may safely remove the following files:
pkg_resources.py
easy_install.py
setuptools/
setuptools-*.egg-info/
That's what ln
is documented to do when the target already exists and is a directory. If you want /etc/nginx
to be a symlink rather than contain a symlink, you had better not create it as a directory first!
To add to @DennisWilliamson comment above:
@VaibhavBajpai: Try this: response=$(curl --write-out \n%{http_code} --silent --output - servername) - the last line in the result will be the response code
You can then parse the response code from the response using something like the following, where X can signify a regex to mark the end of the response (using a json example here)
X='*\}'
code=$(echo ${response##$X})
See Substring Removal: http://tldp.org/LDP/abs/html/string-manipulation.html
What about x *= -1;
? Do you really want a library function for this?
To inactivate the non-desktop styles you just have to change 4 lines of code in the variables.less file. Set the screen width breakpoints in the variables.less file like this:
// Media queries breakpoints // -------------------------------------------------- // Extra small screen / phone // Note: Deprecated @screen-xs and @screen-phone as of v3.0.1 @screen-xs: 1px; @screen-xs-min: @screen-xs; @screen-phone: @screen-xs-min; // Small screen / tablet // Note: Deprecated @screen-sm and @screen-tablet as of v3.0.1 @screen-sm: 2px; @screen-sm-min: @screen-sm; @screen-tablet: @screen-sm-min; // Medium screen / desktop // Note: Deprecated @screen-md and @screen-desktop as of v3.0.1 @screen-md: 3px; @screen-md-min: @screen-md; @screen-desktop: @screen-md-min; // Large screen / wide desktop // Note: Deprecated @screen-lg and @screen-lg-desktop as of v3.0.1 @screen-lg: 9999px; @screen-lg-min: @screen-lg; @screen-lg-desktop: @screen-lg-min;
This sets the min-width on the desktop style media query lower so that it applies to all screen widths. Thanks to 2calledchaos for the improvement! Some base styles are defined in the mobile styles, so we need to be sure to include them.
Edit: chris notes that you can set these variables in the online less compiler on the bootstrap site
I think it will be easy to you. I am using group_concat which concatenate diffent values with separator as we have defined
select ID,User, GROUP_CONCAT(Distinct Department order by Department asc
separator ', ') as Department from Table_Name group by ID
As @weichsel stated, CGFloat is just a typedef for either float
or double
. You can see for yourself by Command-double-clicking on "CGFloat" in Xcode — it will jump to the CGBase.h header where the typedef is defined. The same approach is used for NSInteger and NSUInteger as well.
These types were introduced to make it easier to write code that works on both 32-bit and 64-bit without modification. However, if all you need is float
precision within your own code, you can still use float
if you like — it will reduce your memory footprint somewhat. Same goes for integer values.
I suggest you invest the modest time required to make your app 64-bit clean and try running it as such, since most Macs now have 64-bit CPUs and Snow Leopard is fully 64-bit, including the kernel and user applications. Apple's 64-bit Transition Guide for Cocoa is a useful resource.
If the aim is to just load the contents inside your application, you don't even need to use wget
:
$xmlData = file_get_contents('http://user:[email protected]/file.xml');
Note that this function will not work if allow_url_fopen
is disabled (it's enabled by default) inside either php.ini or the web server configuration (e.g. httpd.conf).
If your host explicitly disables it or if you're writing a library, it's advisable to either use cURL or a library that abstracts the functionality, such as Guzzle.
use GuzzleHttp\Client;
$client = new Client([
'base_url' => 'http://example.com',
'defaults' => [
'auth' => ['user', 'pass'],
]]);
$xmlData = $client->get('/file.xml');
I've run into the very same issue, when mistakenly named variable with the very same name, as function.
So this:
isLive = isLive(data);
failed, generating OP's mentioned error message.
Fix to this was as simple as changing above line to:
isItALive = isLive(data);
I don't know, how much does it helps in this situation, but I decided to put this answer for others looking for a solution for similar problems.
One way to do that is to use a counter:
ArrayList<Integer> list = new ArrayList<Integer>();
...
int size = list.size();
for (Integer i : list) {
...
if (--size == 0) {
// Last item.
...
}
}
Edit
Anyway, as Tom Hawtin said, it is sometimes better to use the "old" syntax when you need to get the current index information, by using a for
loop or the iterator
, as everything you win when using the Java5 syntax will be lost in the loop itself...
for (int i = 0; i < list.size(); i++) {
...
if (i == (list.size() - 1)) {
// Last item...
}
}
or
for (Iterator it = list.iterator(); it.hasNext(); ) {
...
if (!it.hasNext()) {
// Last item...
}
}
If you installed php with homebrew, then check if your apache2.conf file is using homebrew version of php5.so file.
@JulienD Best way is to break above process into two steps.
Step 1 : Lets say 'rawList' as your list that you want to add as parameters in prepared statement.
Create another list :
ArrayList<String> listWithQuotes = new ArrayList<String>();
for(String element : rawList){
listWithQuotes.add("'"+element+"'");
}
Step 2 : Make 'listWithQuotes' comma separated.
String finalString = StringUtils.join(listWithQuotes.iterator(),",");
'finalString' will be string parameters with each element as single quoted and comma separated.
If you haven't actually registered any users with your existing format then you would be best to switch to using the BCrypt password encoder instead.
It's a lot less hassle, as you don't have to worry about salt at all - the details are completely encapsulated within the encoder. Using BCrypt is stronger than using a plain hash algorithm and it's also a standard which is compatible with applications using other languages.
There's really no reason to choose any of the other options for a new application.
Put your assets in the public folder
public/css
public/images
public/fonts
public/js
And them called it using Laravel
{{ HTML::script('js/scrollTo.js'); }}
{{ HTML::style('css/css.css'); }}
A generator is effectively a function that returns (data) before it is finished, but it pauses at that point, and you can resume the function at that point.
>>> def myGenerator():
... yield 'These'
... yield 'words'
... yield 'come'
... yield 'one'
... yield 'at'
... yield 'a'
... yield 'time'
>>> myGeneratorInstance = myGenerator()
>>> next(myGeneratorInstance)
These
>>> next(myGeneratorInstance)
words
and so on. The (or one) benefit of generators is that because they deal with data one piece at a time, you can deal with large amounts of data; with lists, excessive memory requirements could become a problem. Generators, just like lists, are iterable, so they can be used in the same ways:
>>> for word in myGeneratorInstance:
... print word
These
words
come
one
at
a
time
Note that generators provide another way to deal with infinity, for example
>>> from time import gmtime, strftime
>>> def myGen():
... while True:
... yield strftime("%a, %d %b %Y %H:%M:%S +0000", gmtime())
>>> myGeneratorInstance = myGen()
>>> next(myGeneratorInstance)
Thu, 28 Jun 2001 14:17:15 +0000
>>> next(myGeneratorInstance)
Thu, 28 Jun 2001 14:18:02 +0000
The generator encapsulates an infinite loop, but this isn't a problem because you only get each answer every time you ask for it.
This is the code that I needed. A defined user control's .show() function doesn't actually show anything. It must first be wrapped into a form like so:
CustomControl customControl = new CustomControl();
Form newForm = new Form();
newForm.Controls.Add(customControl);
newForm.ShowDialog();
seq -w
will detect the max input width and normalize the width of the output.
for num in $(seq -w 01 05); do
...
done
At time of writing this didn't work on the newest versions of OSX, so you can either install macports and use its version of seq
, or you can set the format explicitly:
seq -f '%02g' 1 3
01
02
03
But given the ugliness of format specifications for such a simple problem, I prefer the solution Henk and Adrian gave, which just uses Bash. Apple can't screw this up since there's no generic "unix" version of Bash:
echo {01..05}
Or:
for number in {01..05}; do ...; done
sudo chown -R $USER:$USER /var/www
Using guava you can just do something like Sets.newHashSet(charArray).toArray();
If you are not using any libraries, you can still use new HashSet<Char>()
and add your char
array there.
Same as all the answers here, but using StreamReader/StreamWriter to split on new lines (line by line, instead of trying to read the whole file into memory at once). This approach can split big files in the fastest way I know of.
Note: I do very little error checking, so I can't guarantee it'll work smoothly for your case. It did for mine (1.7 GB TXT file of 4 million lines split in 100,000 lines per file in 95 seconds).
#split test
$sw = new-object System.Diagnostics.Stopwatch
$sw.Start()
$filename = "C:\Users\Vincent\Desktop\test.txt"
$rootName = "C:\Users\Vincent\Desktop\result"
$ext = ".txt"
$linesperFile = 100000#100k
$filecount = 1
$reader = $null
try{
$reader = [io.file]::OpenText($filename)
try{
"Creating file number $filecount"
$writer = [io.file]::CreateText("{0}{1}.{2}" -f ($rootName,$filecount.ToString("000"),$ext))
$filecount++
$linecount = 0
while($reader.EndOfStream -ne $true) {
"Reading $linesperFile"
while( ($linecount -lt $linesperFile) -and ($reader.EndOfStream -ne $true)){
$writer.WriteLine($reader.ReadLine());
$linecount++
}
if($reader.EndOfStream -ne $true) {
"Closing file"
$writer.Dispose();
"Creating file number $filecount"
$writer = [io.file]::CreateText("{0}{1}.{2}" -f ($rootName,$filecount.ToString("000"),$ext))
$filecount++
$linecount = 0
}
}
} finally {
$writer.Dispose();
}
} finally {
$reader.Dispose();
}
$sw.Stop()
Write-Host "Split complete in " $sw.Elapsed.TotalSeconds "seconds"
Output splitting a 1.7 GB file:
...
Creating file number 45
Reading 100000
Closing file
Creating file number 46
Reading 100000
Closing file
Creating file number 47
Reading 100000
Closing file
Creating file number 48
Reading 100000
Split complete in 95.6308289 seconds
Following is the syntax for writelines() method
fileObject.writelines( sequence )
#!/usr/bin/python
# Open a file
fo = open("foo.txt", "rw+")
seq = ["This is 6th line\n", "This is 7th line"]
# Write sequence of lines at the end of the file.
line = fo.writelines( seq )
# Close opend file
fo.close()
It's a mechanism to invoke an API in an asynchrounous way. The sequence is the following
So you can invoke the api and tell your user the request is "processing" or "acquired" for example, and then update the status when you receive the response from the api.
Hope it makes sense. -G
I don't think there's a jQuery-way to directly access the pseudoclass' rules, but you could always append a new style
element to the document's head like:
$('head').append('<style>.column:before{width:800px !important;}</style>');
See a live demo here
I also remember having seen a plugin that tackles this issue once but I couldn't find it on first googling unfortunately.
It looks like you are running into a bug in the way NetBeans 6.8 creates the jar for a Java Library Project.
The issue implies that there is a work-around.
I have not been able to verify that with NB 6.8 and/or NetBeans 6.9-dev...
You may want to register with the NetBeans.org website/issue tracker and update the issue and add your 'vote'.
<body>
<section>
<section onclick="childIndex(this)">child a</section>
<section onclick="childIndex(this)">child b</section>
<section onclick="childIndex(this)">child c</section>
</section>
<script>
function childIndex(e){
let i = 0;
while (e.parentNode.children[i] != e) i++;
alert('child index '+i);
}
</script>
</body>
I would highly recommend you to go the more tedious route. Especially if your file size is large.
using(var w = new StreamWriter(path))
{
for( /* your loop */)
{
var first = yourFnToGetFirst();
var second = yourFnToGetSecond();
var line = string.Format("{0},{1}", first, second);
w.WriteLine(line);
w.Flush();
}
}
File.AppendAllText()
opens a new file, writes the content and then closes the file. Opening files is a much resource-heavy operation, than writing data into open stream. Opening\closing a file inside a loop will cause performance drop.
The approach suggested by Johan solves that problem by storing all the output in memory and then writing it once. However (in case of big files) you program will consume a large amount of RAM and even crash with OutOfMemoryException
Another advantage of my solution is that you can implement pausing\resuming by saving current position in input data.
upd. Placed using in the right place
Use css to add a right margin to those particular elements. Generally I would build the control, then run it to see what the resulting html structure is like, then make the css alter just those elements.
Preferably you do this by setting the class. Add the CssClass="myrblclass"
attribute to your list declaration.
You can also add attributes to the items programmatically, which will come out the other side.
rblMyRadioButtonList.Items[x].Attributes.CssStyle.Add("margin-right:5px;")
This may be better for you since you can add that attribute for all but the last one.
What did it for me was the following, I've added the following directive in both the http <VirtualHost *:80>
and https <VirtualHost *:443>
virtual host blocks:
ServerName your-app.com
ServerAlias www.your-app.com
Header always unset X-Frame-Options
Header set X-Frame-Options "SAMEORIGIN"
The reasoning behind this? Well by default if set, the server does not reset the X-Frame-Options
header so we need to first always remove the default value, in my case it was DENY
, and then with the next rule we set it to the desired value, in my case SAMEORIGIN
. Of course you can use the Header set X-Frame-Options ALLOW-FROM ...
rule as well.
using an ISNULL is the best way I found of getting round the NULL in dates :
ISNULL(CASE WHEN CONVERT(DATE, YOURDate) = '1900-01-01' THEN '' ELSE CONVERT(CHAR(10), YOURDate, 103) END, '') AS [YOUR Date]
You can also use indexValue attribute for passing multiple parameters via object:
var someData = "hello";
jQuery.ajax({
url: "http://maps.google.com/maps/api/js?v=3",
indexValue: {param1:someData, param2:"Other data 2", param3: "Other data 3"},
dataType: "script"
}).done(function() {
console.log(this.indexValue.param1);
console.log(this.indexValue.param2);
console.log(this.indexValue.param3);
});
Reference Decoder of CRL,CRT,CSR,NEW CSR,PRIVATE KEY, PUBLIC KEY,RSA,RSA Public Key Parser
RSA Public Key
-----BEGIN RSA PUBLIC KEY-----
-----END RSA PUBLIC KEY-----
Encrypted Private Key
-----BEGIN RSA PRIVATE KEY-----
Proc-Type: 4,ENCRYPTED
-----END RSA PRIVATE KEY-----
CRL
-----BEGIN X509 CRL-----
-----END X509 CRL-----
CRT
-----BEGIN CERTIFICATE-----
-----END CERTIFICATE-----
CSR
-----BEGIN CERTIFICATE REQUEST-----
-----END CERTIFICATE REQUEST-----
NEW CSR
-----BEGIN NEW CERTIFICATE REQUEST-----
-----END NEW CERTIFICATE REQUEST-----
PEM
-----BEGIN RSA PRIVATE KEY-----
-----END RSA PRIVATE KEY-----
PKCS7
-----BEGIN PKCS7-----
-----END PKCS7-----
PRIVATE KEY
-----BEGIN PRIVATE KEY-----
-----END PRIVATE KEY-----
DSA KEY
-----BEGIN DSA PRIVATE KEY-----
-----END DSA PRIVATE KEY-----
Elliptic Curve
-----BEGIN EC PRIVATE KEY-----
-----END EC PRIVATE KEY-----
PGP Private Key
-----BEGIN PGP PRIVATE KEY BLOCK-----
-----END PGP PRIVATE KEY BLOCK-----
PGP Public Key
-----BEGIN PGP PUBLIC KEY BLOCK-----
-----END PGP PUBLIC KEY BLOCK-----
Before you try searching for the elements within the iframe you will have to switch Selenium focus to the iframe.
Try this before searching for the elements within the iframe:
driver.switchTo().frame(driver.findElement(By.name("iFrameTitle")));
Try this:
var jIsHasKids = $('#chkIsHasKids').attr('checked');
jIsHasKids = jIsHasKids.toString().toLowerCase();
//OR
jIsHasKids = jIsHasKids.val().toLowerCase();
Possible duplicate with: How do I use jQuery to ignore case when selecting
String Uri = request.getRequestURL()+"?"+request.getQueryString();
The way to get the results of your formula would be to start in a new sheet.
In cell A1 put the formula
=IF('testsheet'!C1 <= 99,'testsheet'!A1,"")
Copy that cell down to row 40 In cell B1 put the formula
=A1
In cell B2 put the formula
=B1 & A2
Copy that cell down to row 40.
The value you want is now in that column in row 40.
Not really the answer you want, but that is the fastest way to get things done excel wise without creating a custom formula that takes in a range and makes the calculation (which would be more fun to do).
And a solution using recursion:
Function ColumnNumberToLetter(iCol As Long) As String
Dim lAlpha As Long
Dim lRemainder As Long
If iCol <= 26 Then
ColumnNumberToLetter = Chr(iCol + 64)
Else
lRemainder = iCol Mod 26
lAlpha = Int(iCol / 26)
If lRemainder = 0 Then
lRemainder = 26
lAlpha = lAlpha - 1
End If
ColumnNumberToLetter = ColumnNumberToLetter(lAlpha) & Chr(lRemainder + 64)
End If
End Function
The function removeItem actually contains an error, which makes the form button do it's default behaviour (submitting the form). The javascript error console will usually give a pointer in this case.
Check out the function removeItem in the javascript part:
The line:
rows[rows.length-1].html('');
doesn't work. Try this instead:
rows.eq(rows.length-1).html('');
Be aware that this property isn't as useful as many people think it is. Just because your app is running on a Windows machine, for example, doesn't mean the file it's reading will be using Windows-style line separators. Many web pages contain a mixture of "\n" and "\r\n", having been cobbled together from disparate sources. When you're reading text as a series of logical lines, you should always look for all three of the major line-separator styles: Windows ("\r\n"), Unix/Linux/OSX ("\n") and pre-OSX Mac ("\r").
When you're writing text, you should be more concerned with how the file will be used than what platform you're running on. For example, if you expect people to read the file in Windows Notepad, you should use "\r\n" because it only recognizes the one kind of separator.
This is very much implementation specific, but the general idea is to allow providers to issue short term access tokens with long term refresh tokens. Why?
The speed tradeoffs between various settings of -Xms and -Xmx depend on the application and system that you run your Java application on. It also depends on your JVM and other garbage collection parameters you use.
This question is 11 years old, and since then the effects of the JVM parameters on performance have become even harder to predict in advance. So you can try different values and see the effects on performance, or use a free tool like Optimizer Studio that will find the optimal JVM parameter values automatically.
HTML:
<i class="icon-cog blackiconcolor">
css :
.blackiconcolor {color:black;}
you can also add extra class to the button icon...
If You have 404 or errors while sudo apt-get install php-curl
just try
sudo apt-get update
and again try
sudo apt-get install php-curl
But notice what version was installed (i use php7.3 and php7.4-curl was installed - so it will not work)
try then
sudo apt-get install php7.3-curl
At the end You may want to restart services like: apache2 or php-fpm:
sudo apache2 restart
sudo service php7.3-fpm restart
this worked for me.
Check if curl is on the installed modules list for current php:
php -m
I created .pfx file from .key and .pem files.
Like this openssl pkcs12 -inkey rootCA.key -in rootCA.pem -export -out rootCA.pfx
That's not the direct answer but still maybe it helps out someone else.
A one-liner is:-
fruitdict = dict(zip(('apple','banana','carrot'), (1,'f', '3'))
For Express 3.0, if you want to use the formidable events, you must remove the multipart middleware, so you can create the new instance of it.
To do this:
app.use(express.bodyParser());
Can be written as:
app.use(express.json());
app.use(express.urlencoded());
app.use(express.multipart()); // Remove this line
And now create the form object:
exports.upload = function(req, res) {
var form = new formidable.IncomingForm;
form.keepExtensions = true;
form.uploadDir = 'tmp/';
form.parse(req, function(err, fields, files){
if (err) return res.end('You found error');
// Do something with files.image etc
console.log(files.image);
});
form.on('progress', function(bytesReceived, bytesExpected) {
console.log(bytesReceived + ' ' + bytesExpected);
});
form.on('error', function(err) {
res.writeHead(400, {'content-type': 'text/plain'}); // 400: Bad Request
res.end('error:\n\n'+util.inspect(err));
});
res.end('Done');
return;
};
I have also posted this on my blog, Getting formidable form object in Express 3.0 on upload.
The error message which you specified is nothing but you are not specifying goal for maven build.
you can specify any goal in your run configuration for maven build like clear, compile, install, package.
please following below step to resolve it.
If like me, you are using some micro VM lacking of memory, creating a swap file does the trick:
#Check free memory before
free -m
mkdir -p /var/_swap_
cd /var/_swap_
#Here, 1M * 2000 ~= 2GB of swap memory. Feel free to add MORE
dd if=/dev/zero of=swapfile bs=1M count=2000
chmod 600 swapfile
mkswap swapfile
swapon swapfile
#Automatically mount this swap partition at startup
echo "/var/_swap_/swapfile none swap sw 0 0" >> /etc/fstab
#Check free memory after
free -m
As several comments pointed out, don't forget to add sudo if you don't work as root.
btw, feel free to select another location/filename/size for the file.
/var
is probably not the best place, but I don't know which place would be, and rarely care since tiny servers are mostly used for testing purposes.
As I parse it, those words are wrong. It should read "If the function modifies that value, the modifications appear also within the scope of the calling function when passing by reference, but not when passing by value."
count the carriage returns/line feeds. I believe in unicode they are still 0x000D and 0x000A respectively. that way you can be as efficient or as inefficient as you want, and decide if you have to deal with both characters or not
No. That is not possible. You should use an array instead:
name[i] = i;
In this case, your name+i
is name[i]
.
Floats are used to store a wider range of number than can be fit in an integer. These include decimal numbers and scientific notation style numbers that can be bigger values than can fit in 32 bits. Here's the deep dive into them: http://en.wikipedia.org/wiki/Floating_point
How about creating a custom ObjectResult class that represents an Internal Server Error like the one for OkObjectResult
?
You can put a simple method in your own base class so that you can easily generate the InternalServerError and return it just like you do Ok()
or BadRequest()
.
[Route("api/[controller]")]
[ApiController]
public class MyController : MyControllerBase
{
[HttpGet]
[Route("{key}")]
public IActionResult Get(int key)
{
try
{
//do something that fails
}
catch (Exception e)
{
LogException(e);
return InternalServerError();
}
}
}
public class MyControllerBase : ControllerBase
{
public InternalServerErrorObjectResult InternalServerError()
{
return new InternalServerErrorObjectResult();
}
public InternalServerErrorObjectResult InternalServerError(object value)
{
return new InternalServerErrorObjectResult(value);
}
}
public class InternalServerErrorObjectResult : ObjectResult
{
public InternalServerErrorObjectResult(object value) : base(value)
{
StatusCode = StatusCodes.Status500InternalServerError;
}
public InternalServerErrorObjectResult() : this(null)
{
StatusCode = StatusCodes.Status500InternalServerError;
}
}
From C++11 onwards, all the standard containers (std::vector
, std::map
, etc) support move semantics, meaning that you can now pass rvalues to standard containers and avoid a copy:
// Example object class.
class object
{
private:
int m_val1;
std::string m_val2;
public:
// Constructor for object class.
object(int val1, std::string &&val2) :
m_val1(val1),
m_val2(std::move(val2))
{
}
};
std::vector<object> myList;
// #1 Copy into the vector.
object foo1(1, "foo");
myList.push_back(foo1);
// #2 Move into the vector (no copy).
object foo2(1024, "bar");
myList.push_back(std::move(foo2));
// #3 Move temporary into vector (no copy).
myList.push_back(object(453, "baz"));
// #4 Create instance of object directly inside the vector (no copy, no move).
myList.emplace_back(453, "qux");
Alternatively you can use various smart pointers to get mostly the same effect:
std::unique_ptr
example
std::vector<std::unique_ptr<object>> myPtrList;
// #5a unique_ptr can only ever be moved.
auto pFoo = std::make_unique<object>(1, "foo");
myPtrList.push_back(std::move(pFoo));
// #5b unique_ptr can only ever be moved.
myPtrList.push_back(std::make_unique<object>(1, "foo"));
std::shared_ptr
example
std::vector<std::shared_ptr<object>> objectPtrList2;
// #6 shared_ptr can be used to retain a copy of the pointer and update both the vector
// value and the local copy simultaneously.
auto pFooShared = std::make_shared<object>(1, "foo");
objectPtrList2.push_back(pFooShared);
// Pointer to object stored in the vector, but pFooShared is still valid.
I got the same issue with netbeans, but mvn build is OK in cmd window. For me the issue resolved after changing netbeans' JDK (in netbeans.conf as below),
netbeans_jdkhome="C:\Program Files\Java\jdk1.8.0_91"
Edit: Seems it's mentioned here: netbeans bug 236364
new mongoose.Schema({ description: { type: String, required: true, trim: true }, completed: { type: Boolean, default: false }, owner: { type: mongoose.Schema.Types.ObjectId, required: true, ref: 'User' } }, { timestamps: true });
^ outside of the character class ("[a-zA-Z]") notes that it is the "begins with" operator.
^ inside of the character negates the specified class.
So, "^[a-zA-Z]" translates to "begins with character from a-z or A-Z", and "[^a-zA-Z]" translates to "is not either a-z or A-Z"
Here's a quick reference: http://www.regular-expressions.info/reference.html
It seems to me, that it is by design that this file is empty.
A similar question has been asked here: https://stackoverflow.com/questions/2567432/ubuntu-apache-httpd-conf-or-apache2-conf
So, you should have a look for /etc/apache2/apache2.conf
var date = new Date();
var targetDate = moment(date).subtract(1, 'day').toDate(); // date object
Now, you can format how you wanna see this date or you can compare this date with another etc.
toDate()
function is the point.
The best and tested solution is to put the following small snippet which will collapse the accordion tab which is already open when you load. In my case the last sixth tab was open so I made it collapsed on page load.
$(document).ready(){
$('#collapseSix').collapse("hide");
}
If you would like a bash function that works both on Mac OS X and Linux:
#
# Convert one date format to another
#
# Usage: convert_date_format <input_format> <date> <output_format>
#
# Example: convert_date_format '%b %d %T %Y %Z' 'Dec 10 17:30:05 2017 GMT' '%Y-%m-%d'
convert_date_format() {
local INPUT_FORMAT="$1"
local INPUT_DATE="$2"
local OUTPUT_FORMAT="$3"
local UNAME=$(uname)
if [[ "$UNAME" == "Darwin" ]]; then
# Mac OS X
date -j -f "$INPUT_FORMAT" "$INPUT_DATE" +"$OUTPUT_FORMAT"
elif [[ "$UNAME" == "Linux" ]]; then
# Linux
date -d "$INPUT_DATE" +"$OUTPUT_FORMAT"
else
# Unsupported system
echo "Unsupported system"
fi
}
# Example: 'Dec 10 17:30:05 2017 GMT' => '2017-12-10'
convert_date_format '%b %d %T %Y %Z' 'Dec 10 17:30:05 2017 GMT' '%Y-%m-%d'
You could create a new array containing that array, so:
<?php
$array = array();
$array['name'] = $oldArray;
?>
The advantages of an abstract class are:
Interfaces are merely data passing contracts and do not have these features. However, they are typically more flexible as a type can only be derived from one class, but can implement any number of interfaces.
I think you need this ..
Dim n as Integer
For n = 5 to 17
msgbox cells(n,3) '--> sched waste
msgbox cells(n,4) '--> type of treatm
msgbox format(cells(n,5),"dd/MM/yyyy") '--> Lic exp
msgbox cells(n,6) '--> email col
Next
$.ajax({type:'POST', url:'www.naver.com', dataType:'text', async:false,
complete:function(xhr, textStatus){},
error:function(xhr, textStatus){},
success:function( data ){
$.ajax({type:'POST',
....
....
success:function(data){
$.ajax({type:'POST',
....
....
}
}
});
I'm sorry but I can't explain what I worte cuz I'm a Korean who can't speak even a word in english. but I think you can easily understand it.
How I redirect to an area is add it as a parameter
@Html.Action("Action", "Controller", new { area = "AreaName" })
for the href portion of a link I use
@Url.Action("Action", "Controller", new { area = "AreaName" })
Have you tried escaping with a double-quote?
= "Maurice ""The Rocket"" Richard"
See a very good article "The definitive guide to Python exceptions". The basic principles are:
BaseException.__init__
with only one argument.There is also information on organizing (in modules) and wrapping exceptions, I recommend to read the guide.
this works for me
yum install python-devel mysql-devel
If you know the name of the alias, you can use the --help
option to describe it. For example:
$ git sa --help
`git sa' is aliased to `stash'
$ git a --help
`git a' is aliased to `add'
try this:
style={{ backgroundImage: `url(require("path/image.ext"))` }}
You are tryng to send js array with js object format.
Instead of use
var a = new array();
a['something']=...
try:
var a = new Object();
a.something = ...
None of the existing answers here has provided a complete example of how to do this from within a script (not a one-liner). Here is what I did:
rename($file, $file.'.bak');
open(IN, '<'.$file.'.bak') or die $!;
open(OUT, '>'.$file) or die $!;
while(<IN>)
{
$_ =~ s/blue/red/g;
print OUT $_;
}
close(IN);
close(OUT);
from Mario Viviani blog one can use this solution from 17 Android Version:
https://plus.google.com/+MarioViviani/posts/fhuzYkji9zz
or
Try this:
File\Other Settings\Preferences
for New Projects\Teminal\Start Directory
Using the DateTime object...
$time = new DateTime('2099-01-01');
$newtime = $time->modify('-1 year')->format('Y-m-d');
Or using now for today
$time = new DateTime('now');
$newtime = $time->modify('-1 year')->format('Y-m-d');
interesting, datepicker default date is current date as I found,
but you can set date by
$("#yourinput").datepicker( "setDate" , "7/11/2011" );
don't forget to check you system date :)
A better approach is to store the old value using .data. This spares the creation of a global var which you should stay away from and keeps the information encapsulated within the element. A real world example as to why Global Vars are bad is documented here
e.g
<script>
//look no global needed:)
$(document).ready(function(){
// Get the initial value
var $el = $('#myInputElement');
$el.data('oldVal', $el.val() );
$el.change(function(){
//store new value
var $this = $(this);
var newValue = $this.data('newVal', $this.val());
})
.focus(function(){
// Get the value when input gains focus
var oldValue = $(this).data('oldVal');
});
});
</script>
<input id="myInputElement" type="text">
Try:
pwd=`pwd`
or
pwd=$(pwd)
Notice no spaces after the equals sign.
Also as Mr. Weiss points out; you don't assign to $pwd
, you assign to pwd
.
Maven plugin uses a settings file where the configuration can be set. Its path is available in Eclipse at Window|Preferences|Maven|User Settings
. If the file doesn't exist, create it and put on something like this:
<settings xmlns="http://maven.apache.org/SETTINGS/1.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0
http://maven.apache.org/xsd/settings-1.0.0.xsd">
<localRepository/>
<interactiveMode/>
<usePluginRegistry/>
<offline/>
<pluginGroups/>
<servers/>
<mirrors/>
<proxies>
<proxy>
<id>myproxy</id>
<active>true</active>
<protocol>http</protocol>
<host>192.168.1.100</host>
<port>6666</port>
<username></username>
<password></password>
<nonProxyHosts>localhost|127.0.0.1</nonProxyHosts>
</proxy>
</proxies>
<profiles/>
<activeProfiles/>
</settings>
After editing the file, it's just a matter of clicking on Update Settings
button and it's done. I've just done it and it worked :)
All the solutions did not really work for me, what did work was compare the elements scrollWidth
to the scrollWidth
of its parent (or child, depending on which element has the trigger).
When the child's scrollWidth
is higher than its parents, it means .text-ellipsis
is active.
When event
is the parent element
function isEllipsisActive(event) {
let el = event.currentTarget;
let width = el.offsetWidth;
let widthChild = el.firstChild.offsetWidth;
return (widthChild >= width);
}
When event
is the child element
function isEllipsisActive(event) {
let el = event.currentTarget;
let width = el.offsetWidth;
let widthParent = el.parentElement.scrollWidth;
return (width >= widthParent);
}
You may have some "plain text" somewhere in php files that is interpreted as script output. It may be even a newline before or after the php script tag specifier (less-than + question mark + "php").
Besides, if I remember correctly, according to http specification, the "Location" header accepts only full URLs, not relative locations. Have that in mind too.
Slightly more than just displaying the function, how about getting the edit in-place facility as well.
\ef <function_name>
is very handy. It will open the source code of the function in editable format.
You will not only be able to view it, you can edit and execute it as well.
Just \ef
without function_name will open editable CREATE FUNCTION template.
For further reference -> https://www.postgresql.org/docs/9.6/static/app-psql.html
Use the below:
var regEx = new RegExp(pattern1+'|'+pattern2, 'gi');
str.match(regEx);
RookieRick is right, using DataGridTemplateColumn
instead of DataGridComboBoxColumn
gives a much simpler XAML.
Moreover, putting the CompanyItem
list directly accessible from the GridItem
allows you to get rid of the RelativeSource
.
IMHO, this give you a very clean solution.
XAML:
<DataGrid AutoGenerateColumns="False" ItemsSource="{Binding GridItems}" >
<DataGrid.Resources>
<DataTemplate x:Key="CompanyDisplayTemplate" DataType="vm:GridItem">
<TextBlock Text="{Binding Company}" />
</DataTemplate>
<DataTemplate x:Key="CompanyEditingTemplate" DataType="vm:GridItem">
<ComboBox SelectedItem="{Binding Company}" ItemsSource="{Binding CompanyList}" />
</DataTemplate>
</DataGrid.Resources>
<DataGrid.Columns>
<DataGridTextColumn Binding="{Binding Name}" />
<DataGridTemplateColumn CellTemplate="{StaticResource CompanyDisplayTemplate}"
CellEditingTemplate="{StaticResource CompanyEditingTemplate}" />
</DataGrid.Columns>
</DataGrid>
View model:
public class GridItem
{
public string Name { get; set; }
public CompanyItem Company { get; set; }
public IEnumerable<CompanyItem> CompanyList { get; set; }
}
public class CompanyItem
{
public int ID { get; set; }
public string Name { get; set; }
public override string ToString() { return Name; }
}
public class ViewModel
{
readonly ObservableCollection<CompanyItem> companies;
public ViewModel()
{
companies = new ObservableCollection<CompanyItem>{
new CompanyItem { ID = 1, Name = "Company 1" },
new CompanyItem { ID = 2, Name = "Company 2" }
};
GridItems = new ObservableCollection<GridItem> {
new GridItem { Name = "Jim", Company = companies[0], CompanyList = companies}
};
}
public ObservableCollection<GridItem> GridItems { get; set; }
}
If you are in ES6 just use the "static" keyword on your method from your example would be the following: static alertMessage: function() {
...
},
Hope can help anyone out there :)
I had almost precisely the same error, and was able to completely fix it simply by running:
gem install bundler
It's possible your bundler installation is corrupt or missing - that's what happened in my case. Note that if the above fails you can try:
sudo gem install bundler
...but generally you can do it without sudo.
Previous answers are correct: adding the line...
Response.AddHeader("Content-Disposition", "inline; filename=[filename]");
...will causing multiple Content-Disposition headers to be sent down to the browser. This happens b/c FileContentResult
internally applies the header if you supply it with a file name. An alternative, and pretty simple, solution is to simply create a subclass of FileContentResult
and override its ExecuteResult()
method. Here's an example that instantiates an instance of the System.Net.Mime.ContentDisposition
class (the same object used in the internal FileContentResult
implementation) and passes it into the new class:
public class FileContentResultWithContentDisposition : FileContentResult
{
private const string ContentDispositionHeaderName = "Content-Disposition";
public FileContentResultWithContentDisposition(byte[] fileContents, string contentType, ContentDisposition contentDisposition)
: base(fileContents, contentType)
{
// check for null or invalid ctor arguments
ContentDisposition = contentDisposition;
}
public ContentDisposition ContentDisposition { get; private set; }
public override void ExecuteResult(ControllerContext context)
{
// check for null or invalid method argument
ContentDisposition.FileName = ContentDisposition.FileName ?? FileDownloadName;
var response = context.HttpContext.Response;
response.ContentType = ContentType;
response.AddHeader(ContentDispositionHeaderName, ContentDisposition.ToString());
WriteFile(response);
}
}
In your Controller
, or in a base Controller
, you can write a simple helper to instantiate a FileContentResultWithContentDisposition
and then call it from your action method, like so:
protected virtual FileContentResult File(byte[] fileContents, string contentType, ContentDisposition contentDisposition)
{
var result = new FileContentResultWithContentDisposition(fileContents, contentType, contentDisposition);
return result;
}
public ActionResult Report()
{
// get a reference to your document or file
// in this example the report exposes properties for
// the byte[] data and content-type of the document
var report = ...
return File(report.Data, report.ContentType, new ContentDisposition {
Inline = true,
FileName = report.FileName
});
}
Now the file will be sent to the browser with the file name you choose and with a content-disposition header of "inline; filename=[filename]".
I hope that helps!
Yes, basically what you done is right, except you forget that JavaScript is sync in many cases, so you running the code before your DOM gets loaded, there are few ways to solve this:
1) Check to see if DOM fully loaded, then do whatever you want, you can listen to DOMContentLoaded for example:
<script>
document.addEventListener("DOMContentLoaded", function(event) {
console.log("DOM fully loaded and parsed");
});
</script>
2) Very common way is adding the script tag to the bottom of your document
(after body tag):
<html>
<head>
</head>
<body>
</body>
<script src="/bundle.js"></script>
</html>
3) Using window.onload
, which gets fired when the entire page loaded(img, etc)
window.addEventListener("load", function() {
console.log("Everything is loaded");
});
4) Using document.onload
, which gets fired when the DOM is ready:
document.addEventListener("load", function() {
console.log("DOM is ready");
});
There are even more options to check if DOM is ready, but the short answer is DO NOT run any script before you make sure your DOM is ready in every cases...
JavaScript is working along with DOM elements and if they are not available, will return null, could break the whole application... so always make sure you are fully ready to run your JavaScript before you do...
This is a bit of a cheat but I just set a default style and then overrode it using a DataTrigger if the value is null...
<Style>
<!-- Highlight for Reviewed (Default) -->
<Setter Property="Control.Background" Value="PaleGreen" />
<Style.Triggers>
<!-- Highlight for Not Reviewed -->
<DataTrigger Binding="{Binding Path=REVIEWEDBY}" Value="{x:Null}">
<Setter Property="Control.Background" Value="LightIndianRed" />
</DataTrigger>
</Style.Triggers>
</Style>
I just used =COUNTIF(Range, "<>")
and it counted non-empty cells for me.
By adding the snippet you extend the Date object.
Date.prototype.getWeek = function() {
var onejan = new Date(this.getFullYear(),0,1);
return Math.ceil((((this - onejan) / 86400000) + onejan.getDay()+1)/7);
}
If you want to use this in multiple pages you can add this to a seperate js file which must be loaded first before your other scripts executes. With other scripts I mean the scripts which uses the getWeek() method.
Try reset
. It clears up the terminal screen but the previous commands can be accessed through arrow or whichever key binding you have.
This is a perfect use for regular expressions:
>>> import re
>>> re.match(r"(.*)\.com", "hello.com").group(1)
'hello'
in my case, this error is raised due to sequence was not created..
CREATE SEQUENCE J.SOME_SEQ MINVALUE 1 MAXVALUE 9999999999999999999999999999 INCREMENT BY 1 START WITH 1 CACHE 20 NOORDER NOCYCLE ;
If you just want to make Apache run an don't mind which port it is running on, do the following:
In the XAMPP Control Panel, click on the Apache - 'Config' button which is located next to the 'Logs' button.
Select 'Apache (httpd.conf)' from the drop down. (notepad should open)
Do Ctrl + F to find '80'. Click 'find next' three times and change line Listen 80
to Listen 8080
Click 'find next' again a couple times until you see line ServerName localhost:80
change this to ServerName localhost:8080
Do Ctrl + S to save and then exit notepad.
Start up Apache again in the XAMPP Control Panel, Apache should successfully run.
Use http://localhost:8080/
in your browser address bar to check everything is working.
EDIT
Also you may have problems running XAMPP while running IIS. If you are running IIS it might be worth stopping the service then starting XAMPP.
we are creating a simple function as
callBackFunction (data, function ( err, response ){
console.log(response)
})
// callbackfunction
function callBackFuntion (data, callback){
//write your logic and return your result as
callback("",result) //if not error
callback(error, "") //if error
}
You can also simply use the Rotate animation feature. That runs a specific animation, for a pre-determined amount of time, on an ImageView.
Animation rotate = AnimationUtils.loadAnimation([context], R.anim.rotate_picture);
splash.startAnimation(rotate);
Then create an animation XML file in your res/anim called rotate_picture with the content:
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
android:shareInterpolator="false">
<rotate
android:fromDegrees="0"
android:toDegrees="360"
android:duration="5000"
android:pivotX="50%"
android:pivotY="50%">
</rotate>
</set>
Now unfortunately, this will only run it once. You'll need a loop somewhere to make it repeat the animation while it's waiting. I experimented a little bit and got my program stuck in infinite loops, so I'm not sure of the best way to that. EDIT: Christopher's answer provides the info on how to make it loop properly, so removing my bad suggestion about separate threads!
If you'd like to track only failed logins, you can use the SQL Server Audit feature (available in SQL Server 2008 and above). You will need to add the SQL server instance you want to audit, and check the failed login operation to audit.
Note: tracking failed logins via SQL Server Audit has its disadvantages. For example - it doesn't provide the names of client applications used.
If you want to audit a client application name along with each failed login, you can use an Extended Events session.
To get you started, I recommend reading this article: http://www.sqlshack.com/using-extended-events-review-sql-server-failed-logins/
var marker = new google.maps.Marker({
position: new google.maps.LatLng(23.016427,72.571156),
map: map,
icon: 'images/map_marker_icon.png',
title: 'Hi..!'
});
apply local path on icon only
Type Cast to List
job_reports = JobReport.objects.filter(job_id=job_id, status=1).values('id', 'name')
json.dumps(list(job_reports))
Yet another alternative:
Select FORMAT(date,'MM.yy')
...
...
group by FORMAT(date,'MM.yy')
If you're using the <Fade in>
element for a react application please add key={}
attribute in it as well or you'll see an error in the console.
According to following images first install required flutter
and dart
plugins and then after downloading Flutter sdk from official-flutter-sdk-download-page, add flutter and dart paths:
You can use '
(which is iffy in IE) or '
(which should work everywhere). For a comprehensive list, see the W3C HTML5 Named Character References or the HTML entities table on WebPlatform.org.
I don't know why the answer seem so complicated... It seems pretty simple to do this with ps
:
mem()
{
ps -eo rss,pid,euser,args:100 --sort %mem | grep -v grep | grep -i $@ | awk '{printf $1/1024 "MB"; $1=""; print }'
}
Example usage:
$ mem mysql
0.511719MB 781 root /bin/sh /usr/bin/mysqld_safe
0.511719MB 1124 root logger -t mysqld -p daemon.error
2.53516MB 1123 mysql /usr/sbin/mysqld --basedir=/usr --datadir=/var/lib/mysql --plugin-dir=/usr/lib/mysql/plugin --user=mysql --pid-file=/var/run/mysqld/mysqld.pid --socket=/var/run/mysqld/mysqld.sock --port=3306
Java doesn't (yet) have a good built-in Time
class (it has one for JDBC queries, but that's not what you want).
One option would be use the JodaTime APIs and its LocalTime class.
Sticking with just the built-in Java APIs, you are stuck with java.util.Date. You can use a SimpleDateFormat to parse the time, then the Date
comparison functions to see if it is before or after some other time:
SimpleDateFormat parser = new SimpleDateFormat("HH:mm");
Date ten = parser.parse("10:00");
Date eighteen = parser.parse("18:00");
try {
Date userDate = parser.parse(someOtherDate);
if (userDate.after(ten) && userDate.before(eighteen)) {
...
}
} catch (ParseException e) {
// Invalid date was entered
}
Or you could just use some string manipulations, perhaps a regular expression to extract just the hour and the minute portions, convert them to numbers and do a numerical comparison:
Pattern p = Pattern.compile("(\d{2}):(\d{2})");
Matcher m = p.matcher(userString);
if (m.matches() ) {
String hourString = m.group(1);
String minuteString = m.group(2);
int hour = Integer.parseInt(hourString);
int minute = Integer.parseInt(minuteString);
if (hour >= 10 && hour <= 18) {
...
}
}
It really all depends on what you are trying to accomplish.
To export db rather it is SQLITE or ROOM:
Firstly, add this permission in AndroidManifest.xml file:
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
Secondly, we drive to code the db functions:
private void exportDB() {
try {
File dbFile = new File(this.getDatabasePath(DATABASE_NAME).getAbsolutePath());
FileInputStream fis = new FileInputStream(dbFile);
String outFileName = DirectoryName + File.separator +
DATABASE_NAME + ".db";
// Open the empty db as the output stream
OutputStream output = new FileOutputStream(outFileName);
// Transfer bytes from the inputfile to the outputfile
byte[] buffer = new byte[1024];
int length;
while ((length = fis.read(buffer)) > 0) {
output.write(buffer, 0, length);
}
// Close the streams
output.flush();
output.close();
fis.close();
} catch (IOException e) {
Log.e("dbBackup:", e.getMessage());
}
}
Create Folder on Daily basis with name of folder is Current date:
public void createBackup() {
sharedPref = getSharedPreferences("dbBackUp", MODE_PRIVATE);
editor = sharedPref.edit();
String dt = sharedPref.getString("dt", new SimpleDateFormat("dd-MM-yy").format(new Date()));
if (dt != new SimpleDateFormat("dd-MM-yy").format(new Date())) {
editor.putString("dt", new SimpleDateFormat("dd-MM-yy").format(new Date()));
editor.commit();
}
File folder = new File(Environment.getExternalStorageDirectory() + File.separator + "BackupDBs");
boolean success = true;
if (!folder.exists()) {
success = folder.mkdirs();
}
if (success) {
DirectoryName = folder.getPath() + File.separator + sharedPref.getString("dt", "");
folder = new File(DirectoryName);
if (!folder.exists()) {
success = folder.mkdirs();
}
if (success) {
exportDB();
}
} else {
Toast.makeText(this, "Not create folder", Toast.LENGTH_SHORT).show();
}
}
Assign the DATABASE_NAME without .db extension and its data type is string
The simplest solution is to disable the IIS service from the services snapin
(use the start menu -> search programs and files -> services.msc to launch the snapin )
This will stop IIS using port 80. Then change Apache back to using port 80.
Use cbind
e.g.
df <- data.frame(b = runif(6), c = rnorm(6))
cbind(a = 0, df)
giving:
> cbind(a = 0, df)
a b c
1 0 0.5437436 -0.1374967
2 0 0.5634469 -1.0777253
3 0 0.9018029 -0.8749269
4 0 0.1649184 -0.4720979
5 0 0.6992595 0.6219001
6 0 0.6907937 -1.7416569
How about mkString ?
theStrings.mkString(",")
A variant exists in which you can specify a prefix and suffix too.
See here for an implementation using foldLeft, which is much more verbose, but perhaps worth looking at for education's sake.
this error basically comes when you use the object before using it.
You cannot put primitive types into collections. However, you can declare them using their corresponding object wrappers and still add the primitive values, as long as the boxing allows you.
Try to Use Flex as that is the new standard of html5.
http://jsfiddle.net/maxspan/1b431hxm/
<div id="row1">
<div id="column1">I am column one</div>
<div id="column2">I am column two</div>
</div>
#row1{
display:flex;
flex-direction:row;
justify-content: space-around;
}
#column1{
display:flex;
flex-direction:column;
}
#column2{
display:flex;
flex-direction:column;
}
Today 2020.05.16 I perform tests of chosen solutions on Chrome v81.0, Safari v13.1 and Firefox v76.0 on MacOs High Sierra v10.13.6
arr[arr.length-1]
(D) is recommended as fastest cross-browser solutionarr.pop()
(A) and immutable _.last(arr)
(L) are fastI test two cases for solutions:
for two cases
function A(arr) {
return arr.pop();
}
function B(arr) {
return arr.splice(-1,1);
}
function C(arr) {
return arr.reverse()[0]
}
function D(arr) {
return arr[arr.length - 1];
}
function E(arr) {
return arr.slice(-1)[0] ;
}
function F(arr) {
let [last] = arr.slice(-1);
return last;
}
function G(arr) {
return arr.slice(-1).pop();
}
function H(arr) {
return [...arr].pop();
}
function I(arr) {
return arr.reduceRight(a => a);
}
function J(arr) {
return arr.find((e,i,a)=> a.length==i+1);
}
function K(arr) {
return $(arr).get(-1);
}
function L(arr) {
return _.last(arr);
}
function M(arr) {
return _.nth(arr, -1);
}
// ----------
// TEST
// ----------
let loc_array=["domain","a","b","c","d","e","f","g","h","file"];
log = (f)=> console.log(`${f.name}: ${f([...loc_array])}`);
[A,B,C,D,E,F,G,H,I,J,K,L,M].forEach(f=> log(f));
_x000D_
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.15/lodash.min.js" integrity="sha256-VeNaFBVDhoX3H+gJ37DpT/nTuZTdjYro9yBruHjVmoQ=" crossorigin="anonymous"></script>
_x000D_
Example results for Chrome for short string
I use following code for get different result from condition That worked for me.
Select A.column, B.column
FROM TABLE1 A
INNER JOIN
TABLE2 B
ON A.Id = (case when (your condition) then b.Id else (something) END)
<img src='someimage.gif' id="datepicker" />
<input type="hidden" id="dp" />
$(document).on("click", "#datepicker", function () {
$("#dp").datepicker({
dateFormat: 'dd-mm-yy',
minDate: 'today'}).datepicker( "show" );
});
you just add this code for image clicking or any other html tag clicking event. This is done by initiate the datepicker function when we click the trigger.
def attributeSelection():
balance = 25
print("Your SP balance is currently 25.")
strength = input("How much SP do you want to put into strength?")
balanceAfterStrength = balance - int(strength)
if balanceAfterStrength == 0:
print("Your SP balance is now 0.")
attributeConfirmation()
elif strength < 0:
print("That is an invalid input. Restarting attribute selection. Keep an eye on your balance this time!")
attributeSelection()
elif strength > balance:
print("That is an invalid input. Restarting attribute selection. Keep an eye on your balance this time!")
attributeSelection()
elif balanceAfterStrength > 0 and balanceAfterStrength < 26:
print("Ok. You're balance is now at " + str(balanceAfterStrength) + " skill points.")
else:
print("That is an invalid input. Restarting attribute selection.")
attributeSelection()
You can easily get child itself and all of its decedents (children) with Jquery's Clone() method, just
var child = $('#div div:nth-child(1)').clone();
var child2 = $('#div div:nth-child(2)').clone();
You will get this for first query as asked in question
<div id="div1">
<p>Some Content</p>
</div>
You need to run Application.run()
because this method starts whole Spring Framework. Code below integrates your main()
with Spring Boot.
Application.java
@SpringBootApplication
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
}
ReconTool.java
@Component
public class ReconTool implements CommandLineRunner {
@Override
public void run(String... args) throws Exception {
main(args);
}
public static void main(String[] args) {
// Recon Logic
}
}
SpringApplication.run(ReconTool.class, args)
Because this way spring is not fully configured (no component scan etc.). Only bean defined in run() is created (ReconTool).
Example project: https://github.com/mariuszs/spring-run-magic
The error "Cannot read property 'map' of undefined"
will be encountered if there is an error in the "this.props.data"
or there is no props.data array.
Better put condition to check the the array like
if(this.props.data){
this.props.data.map(........)
.....
}
Here's the shortest way to merge two arrays.
var array1 = [1,2,3]
let array2 = [4,5,6]
Concatenate/merge them
array1 += array2
New value of array1 is [1,2,3,4,5,6]
No, you cannot know when a page was last updated or last changed or uploaded to a server (which might, depending on interpretation, be three different things) just by accessing the page.
A server may, and should (according to the HTTP 1.1 protocol), send a Last-Modified
header, which you can find out in several ways, e.g. using Rex Swain’s HTTP Viewer. However, according to the protocol, this is just
“the date and time at which the origin server believes the variant was last modified”.
And the protocol realistically adds:
“The exact meaning of this header field depends on the implementation of the origin server and the nature of the original resource. For files, it may be just the file system last-modified time. For entities with dynamically included parts, it may be the most recent of the set of last-modify times for its component parts. For database gateways, it may be the last-update time stamp of the record. For virtual objects, it may be the last time the internal state changed.”
In practice, web pages are very often dynamically created from a Content Management System or otherwise, and in such cases, the Last-Modified
header typically shows a data stamp of creating the response, which is normally very close to the time of the request. This means that the header is practically useless in such cases.
Even in the case of a “static” page (the server simply picks up a file matching the request and sends it), the Last-Modified
date stamp normally indicates just the last write access to the file on the server. This might relate to a time when the file was restored from a backup copy, or a time when the file was edited on the server without making any change to the content, or a time when it was uploaded onto the server, possibly replacing an older identical copy. In these cases, assuming that the time stamp is technically correct, it indicates a time after which the page has not been changed (but not necessarily the time of last change).
From the Intel's manual - Instruction Set Reference, the JE
and JZ
have the same opcode (74
for rel8 / 0F 84
for rel 16/32) also JNE
and JNZ
(75
for rel8 / 0F 85
for rel 16/32) share opcodes.
JE
and JZ
they both check for the ZF
(or zero flag), although the manual differs slightly in the descriptions of the first JE
rel8 and JZ
rel8 ZF
usage, but basically they are the same.
Here is an extract from the manual's pages 464, 465 and 467.
Op Code | mnemonic | Description
-----------|-----------|-----------------------------------------------
74 cb | JE rel8 | Jump short if equal (ZF=1).
74 cb | JZ rel8 | Jump short if zero (ZF ? 1).
0F 84 cw | JE rel16 | Jump near if equal (ZF=1). Not supported in 64-bit mode.
0F 84 cw | JZ rel16 | Jump near if 0 (ZF=1). Not supported in 64-bit mode.
0F 84 cd | JE rel32 | Jump near if equal (ZF=1).
0F 84 cd | JZ rel32 | Jump near if 0 (ZF=1).
75 cb | JNE rel8 | Jump short if not equal (ZF=0).
75 cb | JNZ rel8 | Jump short if not zero (ZF=0).
0F 85 cd | JNE rel32 | Jump near if not equal (ZF=0).
0F 85 cd | JNZ rel32 | Jump near if not zero (ZF=0).
Uploading on Instagram is possible. Their API provides a media upload endpoint, even if it's not documented.
POST https://instagram.com/api/v1/media/upload/
Check this code for example https://code.google.com/p/twitubas/source/browse/common/instagram.php
// this piece of code in the WebApiConfig.cs file or your custom bootstrap application class
// define two types of routes 1. DefaultActionApi and 2. DefaultApi as below
config.Routes.MapHttpRoute("DefaultActionApi", "api/{controller}/{action}/{id}", new { id = RouteParameter.Optional });
config.Routes.MapHttpRoute("DefaultApi", "api/{controller}/{id}", new { action = "Default", id = RouteParameter.Optional });
// decorate the controller action method with [ActionName("Default")] which need to invoked with below url
// http://localhost:XXXXX/api/Demo/ -- will invoke the Get method of Demo controller
// http://localhost:XXXXX/api/Demo/GetAll -- will invoke the GetAll method of Demo controller
// http://localhost:XXXXX/api/Demo/GetById -- will invoke the GetById method of Demo controller
// http://localhost:57870/api/Demo/CustomGetDetails -- will invoke the CustomGetDetails method of Demo controller
// http://localhost:57870/api/Demo/DemoGet -- will invoke the DemoGet method of Demo controller
public class DemoController : ApiController
{
// Mark the method with ActionName attribute (defined in MapRoutes)
[ActionName("Default")]
public HttpResponseMessage Get()
{
return Request.CreateResponse(HttpStatusCode.OK, "Get Method");
}
public HttpResponseMessage GetAll()
{
return Request.CreateResponse(HttpStatusCode.OK, "GetAll Method");
}
public HttpResponseMessage GetById()
{
return Request.CreateResponse(HttpStatusCode.OK, "Getby Id Method");
}
//Custom Method name
[HttpGet]
public HttpResponseMessage DemoGet()
{
return Request.CreateResponse(HttpStatusCode.OK, "DemoGet Method");
}
//Custom Method name
[HttpGet]
public HttpResponseMessage CustomGetDetails()
{
return Request.CreateResponse(HttpStatusCode.OK, "CustomGetDetails Method");
}
}
I used PdfSharp. It's free, open source and quite convenient to use, but I can't say whether it is the best or not, because I haven't really used anything else.
Since the values are actually inside of an HTML attribute, you should use '
"<img src='something' onmouseover='change('ex1')' />";
For anyone else who gets caught, ensure setCustomAnimations is called before the call to replace/add when building the transaction.
C++20 will add constexpr
strings and vectors
The following proposal has been accepted apparently: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p0980r0.pdf and it adds constructors such as:
// 20.3.2.2, construct/copy/destroy
constexpr
basic_string() noexcept(noexcept(Allocator())) : basic_string(Allocator()) { }
constexpr
explicit basic_string(const Allocator& a) noexcept;
constexpr
basic_string(const basic_string& str);
constexpr
basic_string(basic_string&& str) noexcept;
in addition to constexpr versions of all / most methods.
There is no support as of GCC 9.1.0, the following fails to compile:
#include <string>
int main() {
constexpr std::string s("abc");
}
with:
g++-9 -std=c++2a main.cpp
with error:
error: the type ‘const string’ {aka ‘const std::__cxx11::basic_string<char>’} of ‘constexpr’ variable ‘s’ is not literal
std::vector
discussed at: Cannot create constexpr std::vector
Tested in Ubuntu 19.04.
Select
Count(Distinct user_id) As countUsers
, Count(site_id) As countVisits
, site_id As site
From cp_visits
Where ts >= DATE_SUB(NOW(), INTERVAL 1 DAY)
Group By site_id
I wrote this JS function dump()
to work like PHP's var_dump()
.
To show the contents of the variable in an alert window: dump(variable)
To show the contents of the variable in the web page: dump(variable, 'body')
To just get a string of the variable: dump(variable, 'none')
/* repeatString() returns a string which has been repeated a set number of times */
function repeatString(str, num) {
out = '';
for (var i = 0; i < num; i++) {
out += str;
}
return out;
}
/*
dump() displays the contents of a variable like var_dump() does in PHP. dump() is
better than typeof, because it can distinguish between array, null and object.
Parameters:
v: The variable
howDisplay: "none", "body", "alert" (default)
recursionLevel: Number of times the function has recursed when entering nested
objects or arrays. Each level of recursion adds extra space to the
output to indicate level. Set to 0 by default.
Return Value:
A string of the variable's contents
Limitations:
Can't pass an undefined variable to dump().
dump() can't distinguish between int and float.
dump() can't tell the original variable type of a member variable of an object.
These limitations can't be fixed because these are *features* of JS. However, dump()
*/
function dump(v, howDisplay, recursionLevel) {
howDisplay = (typeof howDisplay === 'undefined') ? "alert" : howDisplay;
recursionLevel = (typeof recursionLevel !== 'number') ? 0 : recursionLevel;
var vType = typeof v;
var out = vType;
switch (vType) {
case "number":
/* there is absolutely no way in JS to distinguish 2 from 2.0
so 'number' is the best that you can do. The following doesn't work:
var er = /^[0-9]+$/;
if (!isNaN(v) && v % 1 === 0 && er.test(3.0)) {
out = 'int';
}
*/
break;
case "boolean":
out += ": " + v;
break;
case "string":
out += "(" + v.length + '): "' + v + '"';
break;
case "object":
//check if null
if (v === null) {
out = "null";
}
//If using jQuery: if ($.isArray(v))
//If using IE: if (isArray(v))
//this should work for all browsers according to the ECMAScript standard:
else if (Object.prototype.toString.call(v) === '[object Array]') {
out = 'array(' + v.length + '): {\n';
for (var i = 0; i < v.length; i++) {
out += repeatString(' ', recursionLevel) + " [" + i + "]: " +
dump(v[i], "none", recursionLevel + 1) + "\n";
}
out += repeatString(' ', recursionLevel) + "}";
}
else {
//if object
let sContents = "{\n";
let cnt = 0;
for (var member in v) {
//No way to know the original data type of member, since JS
//always converts it to a string and no other way to parse objects.
sContents += repeatString(' ', recursionLevel) + " " + member +
": " + dump(v[member], "none", recursionLevel + 1) + "\n";
cnt++;
}
sContents += repeatString(' ', recursionLevel) + "}";
out += "(" + cnt + "): " + sContents;
}
break;
default:
out = v;
break;
}
if (howDisplay == 'body') {
var pre = document.createElement('pre');
pre.innerHTML = out;
document.body.appendChild(pre);
}
else if (howDisplay == 'alert') {
alert(out);
}
return out;
}
If you came from Google, this answer might be what you are searching for.
You need to bind the modal hide call to the onclick
event.
Assuming you are using jQuery you can do that with:
$('#closemodal').click(function() {
$('#modalwindow').modal('hide');
});
Also make sure the click event is bound after the document has finished loading:
$(function() {
// Place the above code inside this block
});
enter code here
The answer is hidden in the detailed response above, you can simply do:
$> git reset --hard HEAD@{1}
(See the output of git reflog show)
TO_DATE supports conversion to DATE datatype, which doesn't support milliseconds. If you want millisecond support in Oracle, you should look at TIMESTAMP datatype and TO_TIMESTAMP function.
Hope that helps.
delete_all is a single SQL DELETE statement and nothing more. destroy_all calls destroy() on all matching results of :conditions (if you have one) which could be at least NUM_OF_RESULTS SQL statements.
If you have to do something drastic such as destroy_all() on large dataset, I would probably not do it from the app and handle it manually with care. If the dataset is small enough, you wouldn't hurt as much.
on windows 10 using the 64bit insiders edition the command should be:
git config --global core.editor "'C:\Program Files\Microsoft VS Code Insiders\bin\code-insiders.cmd'"
you can also rename the 'code-insiders.cmd' to 'code.cmd' in the 'Program Files' directory, in this way you can now use the command 'code .' to start editing the files on the . directory
In case you will need only one optional class name:
<div className={"btn-group pull-right " + (this.props.showBulkActions ? "show" : "")}>
If you recently reached here as I did when searching for the same error in vain you may find it to be an update to NSS causing failure on CentOS. Test by running yum update and see if you get errors, curl also creates this error. Solution is simple enough just install NSS manually.
Read on...
If you're like me it threw up an error similar to this:
curl: (77) Problem with the SSL CA cert (path? access rights?)
This took some time to solve but found that it wasn't the CA cert because by recreating them and checking all the configuration I had ruled it out. It could have been libcurl so I went in search of updates.
As mentioned I recreated CA certs. You can do this also but it may be a waste of time. http://wiki.centos.org/HowTos/Https
The next step (probably should of been my first) was to check that everything was up-to-date by simply running yum.
$ yum update
$ yum upgrade
This gave me an affirmative answer that there was a bigger problem at play:
Downloading Packages:
error: rpmts_HdrFromFdno: Header V3 RSA/SHA1 Signature, key ID c105b9de: BAD
Problem opening package nss-softokn-freebl-3.14.3–19.el6_6.x86_64.rpm
I started reading about Certificate Verification with NSS and how this new update may be related to my problems.
So yum is broken. This is because nss-softokn-* needs nss-softokn-freebl-* need each other to function. The problem is they don't check each others version for compatibility and in some cases it ends up breaking yum.
Lets go fix things:
$ wget http://mirrors.linode.com/centos/6.6/updates/x86_64/Packages/nsssoftokn-freebl-3.14.3-19.el6_6.x86_64.rpm
$ rpm -Uvh nss-softokn-freebl-3.14.3–19.el6_6.x86_64.rpm
$ yum update
You should of course download from your nearest mirror and check for the correct version / OS etc. We basically download and install the update from the rpm to fix yum. As @grumpysysadmin pointed out you can shorten the commands down. @cwgtex contributed that you should install the upgrade using the RPM command making the process even simplier.
To fix things with wordpress you need to restart your http server.
$ service httpd restart
Try again and success!
Here's the function I created to read the variable names. It's more general and can be used in different applications:
def get_variable_name(*variable):
'''gets string of variable name
inputs
variable (str)
returns
string
'''
if len(variable) != 1:
raise Exception('len of variables inputed must be 1')
try:
return [k for k, v in locals().items() if v is variable[0]][0]
except:
return [k for k, v in globals().items() if v is variable[0]][0]
To use it in the specified question:
>>> foo = False
>>> bar = True
>>> my_dict = {get_variable_name(foo):foo,
get_variable_name(bar):bar}
>>> my_dict
{'bar': True, 'foo': False}
Aside from object initializers (usable only in constructor calls), the best you can get is:
var it = Stuff.Elements.Foo;
it.Name = "Bob Dylan";
it.Age = 68;
...
I am using laravel5.2 and we can add joins with different options, you can modify as per your requirement.
Option 1:
DB::table('users')
->join('contacts', function ($join) {
$join->on('users.id', '=', 'contacts.user_id')->orOn(...);//you add more joins here
})// and you add more joins here
->get();
Option 2:
$users = DB::table('users')
->join('contacts', 'users.id', '=', 'contacts.user_id')
->join('orders', 'users.id', '=', 'orders.user_id')// you may add more joins
->select('users.*', 'contacts.phone', 'orders.price')
->get();
option 3:
$users = DB::table('users')
->leftJoin('posts', 'users.id', '=', 'posts.user_id')
->leftJoin('...', '...', '...', '...')// you may add more joins
->get();
Sometime ago, I had written a simple utility class that uses JDK5 executor service and executes specific processes in the background. Since doWork() typically would have a void return value, you may want to use this utility class to execute it in the background.
See this article where I had documented this utility.
Use line_profiler.
line_profiler will profile the time individual lines of code take to execute. The profiler is implemented in C via Cython in order to reduce the overhead of profiling.
from line_profiler import LineProfiler
import random
def do_stuff(numbers):
s = sum(numbers)
l = [numbers[i]/43 for i in range(len(numbers))]
m = ['hello'+str(numbers[i]) for i in range(len(numbers))]
numbers = [random.randint(1,100) for i in range(1000)]
lp = LineProfiler()
lp_wrapper = lp(do_stuff)
lp_wrapper(numbers)
lp.print_stats()
The results will be:
Timer unit: 1e-06 s
Total time: 0.000649 s
File: <ipython-input-2-2e060b054fea>
Function: do_stuff at line 4
Line # Hits Time Per Hit % Time Line Contents
==============================================================
4 def do_stuff(numbers):
5 1 10 10.0 1.5 s = sum(numbers)
6 1 186 186.0 28.7 l = [numbers[i]/43 for i in range(len(numbers))]
7 1 453 453.0 69.8 m = ['hello'+str(numbers[i]) for i in range(len(numbers))]
There is a section in the MySQL manual on how to reset the root password which will solve your problem.
Use Convert.ToDouble(value)
rather than (double)value
. It takes an object
and supports all of the types you asked for! :)
Also, your method is always returning a string
in the code above; I'd recommend having the method indicate so, and give it a more obvious name (public string FormatLargeNumber(object value)
)
It is really easy to write text on a canvas. It was not clear if you want someone to enter text in the HTML page and then have that text appear on the canvas, or if you were going to use JavaScript to write the information to the screen.
The following code will write some text in different fonts and formats to your canvas. You can modify this as you wish to test other aspects of writing onto a canvas.
<canvas id="YourCanvasNameHere" width="500" height="500">Canvas not supported</canvas>
var c = document.getElementById('YourCanvasNameHere');
var context = c.getContext('2d'); //returns drawing functions to allow the user to draw on the canvas with graphic tools.
You can either place the canvas ID tag in the HTML and then reference the name or you can create the canvas in the JavaScript code. I think that for the most part I see the <canvas>
tag in the HTML code and on occasion see it created dynamically in the JavaScript code itself.
Code:
var canvas = document.getElementById('myCanvas');
var context = canvas.getContext('2d');
context.font = 'bold 10pt Calibri';
context.fillText('Hello World!', 150, 100);
context.font = 'italic 40pt Times Roman';
context.fillStyle = 'blue';
context.fillText('Hello World!', 200, 150);
context.font = '60pt Calibri';
context.lineWidth = 4;
context.strokeStyle = 'blue';
context.strokeText('Hello World!', 70, 70);
There are a number of methods of obtaining an execution plan, which one to use will depend on your circumstances. Usually you can use SQL Server Management Studio to get a plan, however if for some reason you can't run your query in SQL Server Management Studio then you might find it helpful to be able to obtain a plan via SQL Server Profiler or by inspecting the plan cache.
SQL Server comes with a couple of neat features that make it very easy to capture an execution plan, simply make sure that the "Include Actual Execution Plan" menu item (found under the "Query" menu) is ticked and run your query as normal.
If you are trying to obtain the execution plan for statements in a stored procedure then you should execute the stored procedure, like so:
exec p_Example 42
When your query completes you should see an extra tab entitled "Execution plan" appear in the results pane. If you ran many statements then you may see many plans displayed in this tab.
From here you can inspect the execution plan in SQL Server Management Studio, or right click on the plan and select "Save Execution Plan As ..." to save the plan to a file in XML format.
This method is very similar to method 1 (in fact this is what SQL Server Management Studio does internally), however I have included it for completeness or if you don't have SQL Server Management Studio available.
Before you run your query, run one of the following statements. The statement must be the only statement in the batch, i.e. you cannot execute another statement at the same time:
SET SHOWPLAN_TEXT ON
SET SHOWPLAN_ALL ON
SET SHOWPLAN_XML ON
SET STATISTICS PROFILE ON
SET STATISTICS XML ON -- The is the recommended option to use
These are connection options and so you only need to run this once per connection. From this point on all statements run will be acompanied by an additional resultset containing your execution plan in the desired format - simply run your query as you normally would to see the plan.
Once you are done you can turn this option off with the following statement:
SET <<option>> OFF
Unless you have a strong preference my recommendation is to use the STATISTICS XML
option. This option is equivalent to the "Include Actual Execution Plan" option in SQL Server Management Studio and supplies the most information in the most convenient format.
SHOWPLAN_TEXT
- Displays a basic text based estimated execution plan, without executing the querySHOWPLAN_ALL
- Displays a text based estimated execution plan with cost estimations, without executing the querySHOWPLAN_XML
- Displays an XML based estimated execution plan with cost estimations, without executing the query. This is equivalent to the "Display Estimated Execution Plan..." option in SQL Server Management Studio.STATISTICS PROFILE
- Executes the query and displays a text based actual execution plan.STATISTICS XML
- Executes the query and displays an XML based actual execution plan. This is equivalent to the "Include Actual Execution Plan" option in SQL Server Management Studio.If you can't run your query directly (or your query doesn't run slowly when you execute it directly - remember we want a plan of the query performing badly), then you can capture a plan using a SQL Server Profiler trace. The idea is to run your query while a trace that is capturing one of the "Showplan" events is running.
Note that depending on load you can use this method on a production environment, however you should obviously use caution. The SQL Server profiling mechanisms are designed to minimize impact on the database but this doesn't mean that there won't be any performance impact. You may also have problems filtering and identifying the correct plan in your trace if your database is under heavy use. You should obviously check with your DBA to see if they are happy with you doing this on their precious database!
The plan you get is equivalent to the "Include Actual Execution Plan" option in SQL Server Management Studio.
If you can't run your query directly and you also can't capture a profiler trace then you can still obtain an estimated plan by inspecting the SQL query plan cache.
We inspect the plan cache by querying SQL Server DMVs. The following is a basic query which will list all cached query plans (as xml) along with their SQL text. On most database you will also need to add additional filtering clauses to filter the results down to just the plans you are interested in.
SELECT UseCounts, Cacheobjtype, Objtype, TEXT, query_plan
FROM sys.dm_exec_cached_plans
CROSS APPLY sys.dm_exec_sql_text(plan_handle)
CROSS APPLY sys.dm_exec_query_plan(plan_handle)
Execute this query and click on the plan XML to open up the plan in a new window - right click and select "Save execution plan as..." to save the plan to file in XML format.
Because there are so many factors involved (ranging from the table and index schema down to the data stored and the table statistics) you should always try to obtain an execution plan from the database you are interested in (normally the one that is experiencing a performance problem).
You can't capture an execution plan for encrypted stored procedures.
An actual execution plan is one where SQL Server actually runs the query, whereas an estimated execution plan SQL Server works out what it would do without executing the query. Although logically equivalent, an actual execution plan is much more useful as it contains additional details and statistics about what actually happened when executing the query. This is essential when diagnosing problems where SQL Servers estimations are off (such as when statistics are out of date).
This is a topic worthy enough for a (free) book in its own right.
The main distinction between the two methods is:
loc
gets rows (and/or columns) with particular labels.
iloc
gets rows (and/or columns) at integer locations.
To demonstrate, consider a series s
of characters with a non-monotonic integer index:
>>> s = pd.Series(list("abcdef"), index=[49, 48, 47, 0, 1, 2])
49 a
48 b
47 c
0 d
1 e
2 f
>>> s.loc[0] # value at index label 0
'd'
>>> s.iloc[0] # value at index location 0
'a'
>>> s.loc[0:1] # rows at index labels between 0 and 1 (inclusive)
0 d
1 e
>>> s.iloc[0:1] # rows at index location between 0 and 1 (exclusive)
49 a
Here are some of the differences/similarities between s.loc
and s.iloc
when passed various objects:
<object> | description | s.loc[<object>] |
s.iloc[<object>] |
---|---|---|---|
0 |
single item | Value at index label 0 (the string 'd' ) |
Value at index location 0 (the string 'a' ) |
0:1 |
slice | Two rows (labels 0 and 1 ) |
One row (first row at location 0) |
1:47 |
slice with out-of-bounds end | Zero rows (empty Series) | Five rows (location 1 onwards) |
1:47:-1 |
slice with negative step | Four rows (labels 1 back to 47 ) |
Zero rows (empty Series) |
[2, 0] |
integer list | Two rows with given labels | Two rows with given locations |
s > 'e' |
Bool series (indicating which values have the property) | One row (containing 'f' ) |
NotImplementedError |
(s>'e').values |
Bool array | One row (containing 'f' ) |
Same as loc |
999 |
int object not in index | KeyError |
IndexError (out of bounds) |
-1 |
int object not in index | KeyError |
Returns last value in s |
lambda x: x.index[3] |
callable applied to series (here returning 3rd item in index) | s.loc[s.index[3]] |
s.iloc[s.index[3]] |
loc
's label-querying capabilities extend well-beyond integer indexes and it's worth highlighting a couple of additional examples.
Here's a Series where the index contains string objects:
>>> s2 = pd.Series(s.index, index=s.values)
>>> s2
a 49
b 48
c 47
d 0
e 1
f 2
Since loc
is label-based, it can fetch the first value in the Series using s2.loc['a']
. It can also slice with non-integer objects:
>>> s2.loc['c':'e'] # all rows lying between 'c' and 'e' (inclusive)
c 47
d 0
e 1
For DateTime indexes, we don't need to pass the exact date/time to fetch by label. For example:
>>> s3 = pd.Series(list('abcde'), pd.date_range('now', periods=5, freq='M'))
>>> s3
2021-01-31 16:41:31.879768 a
2021-02-28 16:41:31.879768 b
2021-03-31 16:41:31.879768 c
2021-04-30 16:41:31.879768 d
2021-05-31 16:41:31.879768 e
Then to fetch the row(s) for March/April 2021 we only need:
>>> s3.loc['2021-03':'2021-04']
2021-03-31 17:04:30.742316 c
2021-04-30 17:04:30.742316 d
loc
and iloc
work the same way with DataFrames as they do with Series. It's useful to note that both methods can address columns and rows together.
When given a tuple, the first element is used to index the rows and, if it exists, the second element is used to index the columns.
Consider the DataFrame defined below:
>>> import numpy as np
>>> df = pd.DataFrame(np.arange(25).reshape(5, 5),
index=list('abcde'),
columns=['x','y','z', 8, 9])
>>> df
x y z 8 9
a 0 1 2 3 4
b 5 6 7 8 9
c 10 11 12 13 14
d 15 16 17 18 19
e 20 21 22 23 24
Then for example:
>>> df.loc['c': , :'z'] # rows 'c' and onwards AND columns up to 'z'
x y z
c 10 11 12
d 15 16 17
e 20 21 22
>>> df.iloc[:, 3] # all rows, but only the column at index location 3
a 3
b 8
c 13
d 18
e 23
Sometimes we want to mix label and positional indexing methods for the rows and columns, somehow combining the capabilities of loc
and iloc
.
For example, consider the following DataFrame. How best to slice the rows up to and including 'c' and take the first four columns?
>>> import numpy as np
>>> df = pd.DataFrame(np.arange(25).reshape(5, 5),
index=list('abcde'),
columns=['x','y','z', 8, 9])
>>> df
x y z 8 9
a 0 1 2 3 4
b 5 6 7 8 9
c 10 11 12 13 14
d 15 16 17 18 19
e 20 21 22 23 24
We can achieve this result using iloc
and the help of another method:
>>> df.iloc[:df.index.get_loc('c') + 1, :4]
x y z 8
a 0 1 2 3
b 5 6 7 8
c 10 11 12 13
get_loc()
is an index method meaning "get the position of the label in this index". Note that since slicing with iloc
is exclusive of its endpoint, we must add 1 to this value if we want row 'c' as well.
Your quotes only need to surround the value part of the attribute-equals selector, [attr='val']
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});?
$('.segment-name').click(function () {
if($(this).hasClass('segment-a')){
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}
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