I know it's over a year old, but calling requestFeature()
never solved my problem. In fact I don't call it at all.
It was an issue with inflating the view I suppose. Despite all my searching, I never found a suitable solution until I played around with the different methods of inflating a view.
AlertDialog.Builder is the easy solution but requires a lot of work if you use the onPrepareDialog()
to update that view.
Another alternative is to leverage AsyncTask for dialogs.
A final solution that I used is below:
public class CustomDialog extends AlertDialog {
private View content;
public CustomDialog(Context context) {
super(context);
LayoutInflater li = LayoutInflater.from(context);
content = li.inflate(R.layout.custom_view, null);
setUpAdditionalStuff(); // do more view cleanup
setView(content);
}
private void setUpAdditionalStuff() {
// ...
}
// Call ((CustomDialog) dialog).prepare() in the onPrepareDialog() method
public void prepare() {
setTitle(R.string.custom_title);
setIcon( getIcon() );
// ...
}
}
* Some Additional notes:
This site helped me: https://gist.github.com/ocean90/1268328 (Note that on that site the left and right are reversed as of the date of this post... but they work as expected). They are corrected in the code below.
<!DOCTYPE html>
<html>
<head>
<title>Box Shadow</title>
<style>
.box {
height: 150px;
width: 300px;
margin: 20px;
border: 1px solid #ccc;
}
.top {
box-shadow: 0 -5px 5px -5px #333;
}
.right {
box-shadow: 5px 0 5px -5px #333;
}
.bottom {
box-shadow: 0 5px 5px -5px #333;
}
.left {
box-shadow: -5px 0 5px -5px #333;
}
.all {
box-shadow: 0 0 5px #333;
}
</style>
</head>
<body>
<div class="box top"></div>
<div class="box right"></div>
<div class="box bottom"></div>
<div class="box left"></div>
<div class="box all"></div>
</body>
</html>
using jQuery:
$('form').submit(function(){
$(':submit', this).click(function() {
return false;
});
});
If you don't know there exist any data in your table or not, you can use following query:
SELECT cons_value FROM table_name;
For an Example:
SELECT 1 FROM employee;
So, we use this SQL query to know if there is any data in the table & the number of rows indicates how many rows exist in this table.
You can change the eclipse tomcat server configuration. Open the server view, double click on you server to open server configuration. Then click to activate "Publish module contents to separate XML files". Finally, restart your server, the message must disappear.
protected void Application_Start(object sender, EventArgs e)
{
string path = Server.MapPath("/");
//or
string path2 = Server.MapPath("~");
//depends on your application needs
}
Are you using php 5.4 on your local? the render line is using the new way of initializing arrays. Try replacing ["title" => "Welcome "]
with array("title" => "Welcome ")
Just to clarify the answer given by JScoobyCed, the scp command cannot copy files to directories that require administrative permission. However, you can use the scp command to copy to directories that belong to the remote user.
So, to copy to a directory that requires root privileges, you must first copy that file to a directory belonging to the remote user using the scp command. Next, you must login to the remote account using ssh. Once logged in, you can then move the file to the directory of your choosing by using the sudo mv command. In short, the commands to use are as follows:
Using scp, copy file to a directory in the remote user's account, for example the Documents directory:
scp /path/to/your/local/file remoteUser@some_address:/home/remoteUser/Documents
Next, login to the remote user's account using ssh and then move the file to a restricted directory using sudo:
ssh remoteUser@some_address
sudo mv /home/remoteUser/Documents/file /var/www
I just had a very similar issue with the added problem that I needed to create download links to files inside a ZIP file.
I first tried to create a temporary file, then provided a link to the temporary file, but I found that some browsers would just display the contents (a CSV Excel file) rather than offering to download. Eventually I found the solution by using a servlet. It works both on Tomcat and GlassFish, and I tried it on Internet Explorer 10 and Chrome.
The servlet takes as input a full path name to the ZIP file, and the name of the file inside the zip that should be downloaded.
Inside my JSP file I have a table displaying all the files inside the zip, with links that say: onclick='download?zip=<%=zip%>&csv=<%=csv%>'
The servlet code is in download.java:
package myServlet;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.util.zip.*;
import java.util.*;
// Extend HttpServlet class
public class download extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException
{
PrintWriter out = response.getWriter(); // now we can write to the client
String filename = request.getParameter("csv");
String zipfile = request.getParameter("zip");
String aLine = "";
response.setContentType("application/x-download");
response.setHeader( "Content-Disposition", "attachment; filename=" + filename); // Force 'save-as'
ZipFile zip = new ZipFile(zipfile);
for (Enumeration e = zip.entries(); e.hasMoreElements();) {
ZipEntry entry = (ZipEntry) e.nextElement();
if(entry.toString().equals(filename)) {
InputStream is = zip.getInputStream(entry);
BufferedReader br = new BufferedReader(new InputStreamReader(is, "UTF-8"), 65536);
while ((aLine = br.readLine()) != null) {
out.println(aLine);
}
is.close();
break;
}
}
}
}
To compile on Tomcat you need the classpath to include tomcat\lib\servlet-api.jar or on GlassFish: glassfish\lib\j2ee.jar
But either one will work on both. You also need to set your servlet in web.xml
.
If you don't feel like dropping and recreating the whole shebang just to reload your data, you could use MyModel.destroy_all
(or delete_all
) in the seed.db file to clean out a table before your MyModel.create!(...)
statements load the data. Then, you can redo the db:seed
operation over and over. (Obviously, this only affects the tables you've loaded data into, not the rest of them.)
There's a "dirty hack" at https://stackoverflow.com/a/14957893/4553442 to add a "de-seeding" operation similar to migrating up and down...
just in case someone comes with this question, this is how I do it, please forget about the repository object, I'm using the Repository Pattern, you can use your object context to retrieve the entities. And also don't pay attention to my entity names, my entity type Action has nothing to do with an MVC Action.
Controller:
ViewBag.ActionStatusId = new SelectList(repository.GetAll<ActionStatus>(), "ActionStatusId", "Name", myAction.ActionStatusId);
Pay attention that the last variable of the SelectList constructor is the selected value (object selectedValue)
Then this is my view to render it:
<div class="editor-label">
@Html.LabelFor(model => model.ActionStatusId, "ActionStatus")
</div>
<div class="editor-field">
@Html.DropDownList("ActionStatusId")
@Html.ValidationMessageFor(model => model.ActionStatusId)
</div>
I think it is pretty simple, I hope this helps! :)
I prefer to do this via a script nowadays
REM install the needed Windows IIS features for WCF
dism /Online /Enable-Feature /FeatureName:WAS-WindowsActivationService
dism /Online /Enable-Feature /FeatureName:WAS-ProcessModel
dism /Online /Enable-Feature /FeatureName:WAS-NetFxEnvironment
dism /Online /Enable-Feature /FeatureName:WAS-ConfigurationAPI
dism /Online /Enable-Feature /FeatureName:WCF-HTTP-Activation
dism /Online /Enable-Feature /FeatureName:WCF-HTTP-Activation45
REM Feature Install Complete
pause
Another cause is accidentally putting the data=...
inside the aes(...)
instead of outside:
RIGHT:
ggplot(data=df[df$var7=='9-06',], aes(x=lifetime,y=rep_rate,group=mdcp,color=mdcp) ...)
WRONG:
ggplot(aes(data=df[df$var7=='9-06',],x=lifetime,y=rep_rate,group=mdcp,color=mdcp) ...)
In particular this can happen when you prototype your plot command with qplot()
, which doesn't use an explicit aes()
, then edit/copy-and-paste it into a ggplot()
qplot(data=..., x=...,y=..., ...)
ggplot(data=..., aes(x=...,y=...,...))
It's a pity ggplot's error message isn't Missing 'data' argument! instead of this cryptic nonsense, because that's what this message often means.
I did this in three steps by following the instructions here: This is all taken directly from here: http://ipython.readthedocs.io/en/stable/install/kernel_install.html. I'm currently running Python 2.x on Windows 8 and have Anaconda 4.2.13 installed.
1) First install the latest version of python:
conda create -n python3 python=3 ipykernel
2) Next activate python3
activate python3
3) Install the kernel:
python -m ipykernel install --user
If you have Python 3 installed and want to install 2, switch the 2 and the 3 above. When you open a new notebook, you can now choose between Python 2 or 3.
You need to fix your include_path
system variable to point to the correct location.
To fix it edit the php.ini
file. In that file you will find a line that says, "include_path = ...
". (You can find out what the location of php.ini by running phpinfo()
on a page.) Fix the part of the line that says, "\xampplite\php\pear\PEAR
" to read "C:\xampplite\php\pear
". Make sure to leave the semi-colons before and/or after the line in place.
Restart PHP and you should be good to go. To restart PHP in IIS you can restart the application pool assigned to your site or, better yet, restart IIS all together.
Pretty much down to personal choice. It may make sense to use an extension based on the database scheme you are storing; treat your database schema as a file format, with SQLite simply being an encoding used for that file format. So, you might use .bookmarks
if it's storing bookmarks, or .index
if it's being used as an index.
If you want to use a generic extension, I'd use .sqlite3
since that is most descriptive of what version of SQLite is needed to work with the database.
jQuery and console.log
are unrelated entities, although useful when used together.
If you use a browser's built-in dev tools, console.log
will log information about the object being passed to the log
function.
If the console is not active, logging will not work, and may break your script. Be certain to check that the console exists before logging:
if (window.console) console.log('foo');
The shortcut form of this might be seen instead:
window.console&&console.log('foo');
There are other useful debugging functions as well, such as debug
, dir
and error
. Firebug's wiki lists the available functions in the console api.
After a long Google, I came to know that javac.exe will be inside JDK(C:\Program Files\Java\jdk(version number)\bin) not inside JRE (C:\Program Files (x86)\Java\jre7\bin) "JRE doesn't come with a compiler. It(JRE) is simply a java runtime environment. What you need is the Java development kit." in order to use compiler javac
javac will not work if you are pointing bin inside jre
In order to use javac in cmd , JDK must be installed in your system...
For javac path
path = C:\Program Files (x86)\Java\jre7\bin this is wrong
path = C:\Program Files\Java\jdk(version number)\bin this is correct
Make sure that "javac.exe" is inside your "C:\Program Files\Java\jdk(version number)\bin"
Don't get confused with JRE and JDK both are totally different
if you don't have JDK pls download from this link
or
http://www.oracle.com/technetwork/java/javase/downloads/index.html
reference thread for JDK VS JRE What is the difference between JDK and JRE?
It's checking the return value ($?
) of grep
. In this case it's comparing it to 0 (success).
Usually when you see something like this (checking the return value of grep) it's checking to see whether the particular string was detected. Although the redirect to /dev/null
isn't necessary, the same thing can be accomplished using -q
.
From the description and from the reference to the search box in the Ubuntu site, I gather that you actually want an arrowhead character pointing to the right. There are no Unicode characters designed to be used as arrowheads, but some of them may visually resemble an arrowhead.
In particular, if you draw your idea of the character at Shapecatcher.com, you will find many suggestions, such as “>” RIGHT-POINTING ANGLE BRACKET' (U+232A) and “?” MEDIUM RIGHT-POINTING ANGLE BRACKET ORNAMENT (U+276D).
Such characters generally have limited support in fonts, so you would need to carefully write a longish font-family
list or to use a downloadable font. See my Guide to using special characters in HTML.
Especially if the intended use is as a symbol in a search box, as the reference to the Ubuntu page suggests, it is questionable whether you should use a character at all. It’s not really an element of text here; rather, a graphic symbol that accompanies text but isn’t a part of it. So why take all the trouble with using a character (safely), when it isn’t really a character?
Other function in python, faster than Developer's method (for me at least) and inspired by Cédric Dufour solution:
def ptInTriang(p_test, p0, p1, p2):
dX = p_test[0] - p0[0]
dY = p_test[1] - p0[1]
dX20 = p2[0] - p0[0]
dY20 = p2[1] - p0[1]
dX10 = p1[0] - p0[0]
dY10 = p1[1] - p0[1]
s_p = (dY20*dX) - (dX20*dY)
t_p = (dX10*dY) - (dY10*dX)
D = (dX10*dY20) - (dY10*dX20)
if D > 0:
return ( (s_p >= 0) and (t_p >= 0) and (s_p + t_p) <= D )
else:
return ( (s_p <= 0) and (t_p <= 0) and (s_p + t_p) >= D )
You can test it with:
X_size = 64
Y_size = 64
ax_x = np.arange(X_size).astype(np.float32)
ax_y = np.arange(Y_size).astype(np.float32)
coords=np.meshgrid(ax_x,ax_y)
points_unif = (coords[0].reshape(X_size*Y_size,),coords[1].reshape(X_size*Y_size,))
p_test = np.array([0 , 0])
p0 = np.array([22 , 8])
p1 = np.array([12 , 55])
p2 = np.array([7 , 19])
fig = plt.figure(dpi=300)
for i in range(0,X_size*Y_size):
p_test[0] = points_unif[0][i]
p_test[1] = points_unif[1][i]
if ptInTriang(p_test, p0, p1, p2):
plt.plot(p_test[0], p_test[1], '.g')
else:
plt.plot(p_test[0], p_test[1], '.r')
It takes a lot to plot, but that grid is tested in 0.0195319652557 seconds against 0.0844349861145 seconds of Developer's code.
Finally the code comment:
# Using barycentric coordintes, any point inside can be described as:
# X = p0.x * r + p1.x * s + p2.x * t
# Y = p0.y * r + p1.y * s + p2.y * t
# with:
# r + s + t = 1 and 0 < r,s,t < 1
# then: r = 1 - s - t
# and then:
# X = p0.x * (1 - s - t) + p1.x * s + p2.x * t
# Y = p0.y * (1 - s - t) + p1.y * s + p2.y * t
#
# X = p0.x + (p1.x-p0.x) * s + (p2.x-p0.x) * t
# Y = p0.y + (p1.y-p0.y) * s + (p2.y-p0.y) * t
#
# X - p0.x = (p1.x-p0.x) * s + (p2.x-p0.x) * t
# Y - p0.y = (p1.y-p0.y) * s + (p2.y-p0.y) * t
#
# we have to solve:
#
# [ X - p0.x ] = [(p1.x-p0.x) (p2.x-p0.x)] * [ s ]
# [ Y - p0.Y ] [(p1.y-p0.y) (p2.y-p0.y)] [ t ]
#
# ---> b = A*x ; ---> x = A^-1 * b
#
# [ s ] = A^-1 * [ X - p0.x ]
# [ t ] [ Y - p0.Y ]
#
# A^-1 = 1/D * adj(A)
#
# The adjugate of A:
#
# adj(A) = [(p2.y-p0.y) -(p2.x-p0.x)]
# [-(p1.y-p0.y) (p1.x-p0.x)]
#
# The determinant of A:
#
# D = (p1.x-p0.x)*(p2.y-p0.y) - (p1.y-p0.y)*(p2.x-p0.x)
#
# Then:
#
# s_p = { (p2.y-p0.y)*(X - p0.x) - (p2.x-p0.x)*(Y - p0.Y) }
# t_p = { (p1.x-p0.x)*(Y - p0.Y) - (p1.y-p0.y)*(X - p0.x) }
#
# s = s_p / D
# t = t_p / D
#
# Recovering r:
#
# r = 1 - (s_p + t_p)/D
#
# Since we only want to know if it is insidem not the barycentric coordinate:
#
# 0 < 1 - (s_p + t_p)/D < 1
# 0 < (s_p + t_p)/D < 1
# 0 < (s_p + t_p) < D
#
# The condition is:
# if D > 0:
# s_p > 0 and t_p > 0 and (s_p + t_p) < D
# else:
# s_p < 0 and t_p < 0 and (s_p + t_p) > D
#
# s_p = { dY20*dX - dX20*dY }
# t_p = { dX10*dY - dY10*dX }
# D = dX10*dY20 - dY10*dX20
You have to loop through the list and fill your String[]
.
String[] array = new String[lst.size()];
int index = 0;
for (Object value : lst) {
array[index] = (String) value;
index++;
}
If the list would be of String
values, List then this would be as simple as calling lst.toArray(new String[0])
;
You can also use :=
construct to assign and decide on action in one step. Consider following example:
# Example of setting default server and reporting it's status
server=$1
if [[ ${server:=localhost} =~ [a-z] ]] # 'localhost' assigned here to $server
then echo "server is localhost" # echo is triggered since letters were found in $server
else
echo "server was set" # numbers were passed
fi
If $1
is not empty, localhost
will be assigned to server
in the if
condition field, trigger match and report match result. In this way you can assign on the fly and trigger appropriate action.
You can use this js code:
<input type="date" id="dateDefault" />
JS
function setInputDate(_id){
var _dat = document.querySelector(_id);
var hoy = new Date(),
d = hoy.getDate(),
m = hoy.getMonth()+1,
y = hoy.getFullYear(),
data;
if(d < 10){
d = "0"+d;
};
if(m < 10){
m = "0"+m;
};
data = y+"-"+m+"-"+d;
console.log(data);
_dat.value = data;
};
setInputDate("#dateDefault");
A POD is a type (including classes) where the C++ compiler guarantees that there will be no "magic" going on in the structure: for example hidden pointers to vtables, offsets that get applied to the address when it is cast to other types (at least if the target's POD too), constructors, or destructors. Roughly speaking, a type is a POD when the only things in it are built-in types and combinations of them. The result is something that "acts like" a C type.
int
, char
, wchar_t
, bool
, float
, double
are PODs, as are long/short
and signed/unsigned
versions of them.enums
are PODsconst
or volatile
POD is a POD.class
, struct
or union
of PODs is a POD provided that all non-static data members are public
, and it has no base class and no constructors, destructors, or virtual methods. Static members don't stop something being a POD under this rule. This rule has changed in C++11 and certain private members are allowed: Can a class with all private members be a POD class?3.9(10): "Arithmetic types (3.9.1), enumeration types, pointer types, and pointer to member types (3.9.2) and cv-qualified versions of these types (3.9.3) are collectively caller scalar types. Scalar types, POD-struct types, POD-union types (clause 9), arrays of such types and cv-qualified versions of these types (3.9.3) are collectively called POD types"
9(4): "A POD-struct is an aggregate class that has no non-static data members of type non-POD-struct, non-POD-union (or array of such types) or reference, and has no user-define copy operator and no user-defined destructor. Similarly a POD-union is an aggregate union that has no non-static data members of type non-POD-struct, non-POD-union (or array of such types) or reference, and has no user-define copy operator and no user-defined destructor.
8.5.1(1): "An aggregate is an array or class (clause 9) with no user-declared constructors (12.1), no private or protected non-static data members (clause 11), no base classes (clause 10) and no virtual functions (10.3)."
You can do like this:
a {font-size: 100px}
Try avoid using font tag because it's deprecated. Use CSS like above instead. You can give your anchors specific class and apply any style for them.
char *p = "String"; means pointer to a string type variable.
char p3[5] = "String"
; means you are pre-defining the size of the array to consist of no more than 5 elements. Note that,for strings the null "\0" is also considered as an element.So,this statement would give an error since the number of elements is 7 so it should be:
char p3[7]= "String";
One way to handle this is to do it in a transaction, and make your SELECT query take an update lock on the rows selected until the transaction completes.
BEGIN TRAN
SELECT Id FROM Table1 WITH (UPDLOCK)
WHERE AlertDate IS NULL;
UPDATE Table1 SET AlertDate = getutcdate()
WHERE AlertDate IS NULL;
COMMIT TRAN
This eliminates the possibility that a concurrent client updates the rows selected in the moment between your SELECT and your UPDATE.
When you commit the transaction, the update locks will be released.
Another way to handle this is to declare a cursor for your SELECT with the FOR UPDATE option. Then UPDATE WHERE CURRENT OF CURSOR. The following is not tested, but should give you the basic idea:
DECLARE cur1 CURSOR FOR
SELECT AlertDate FROM Table1
WHERE AlertDate IS NULL
FOR UPDATE;
DECLARE @UpdateTime DATETIME
SET @UpdateTime = GETUTCDATE()
OPEN cur1;
FETCH NEXT FROM cur1;
WHILE @@FETCH_STATUS = 0
BEGIN
UPDATE Table1
SET AlertDate = @UpdateTime --set value
WHERE CURRENT OF cur1;
FETCH NEXT FROM cur1;
END
According to MSDN, it's 260 characters. It includes "<NUL>"
-the invisible terminating null character, so the actual length is 259.
But read the article, it's a bit more complicated.
check this quick reminder of file path
Here is all you need to know about relative file paths:
To center a non background image depends on whether you want to display the image as an inline (default behavior) or a block element.
Case of inline
If you want to keep the default behavior of the image's display CSS property, you will need to wrap your image inside another block element to which you must set text-align: center;
Case of block
If you want to consider the image as a block element of its own, then text-align
property does not make a sens, and you should do this instead:
IMG.display {
display: block;
margin-left: auto;
margin-right: auto;
}
The answer to your question:
Is the property text-align: center; a good way to center an image using CSS?
Yes and no.
text-align
property: and may be you would not like this side effect.References
Go File -> New Project.
Select Web under Visual C#.
Select ASP.NET Web Application
Click OK.
Select MVC.
Click OK.
Here is a minor variation on Aleksandr Petrov's response using ES6
removePeople(e) {
let filteredArray = this.state.people.filter(item => item !== e.target.value)
this.setState({people: filteredArray});
}
Solution might be this simple:
sudo su
nano /etc/zabbix/zabbix-server.conf
Remove "#" in front of DBPassword=YourPassword (will change from blue to grey)
Ctrl x (Y to save and press enter to exit)
service zabbix-server restart
Now you can refresh your browser running ZABBIX. If not, you will have to do the same steps for CacheSize=32M
You do not have to change anything in /etc/zabbix/web/zabbix.conf.php (localhost is fine)
When editing anything, remember "#" in front of line means invisible to linux.
You can set any pointer to NULL
, though NULL
is simply defined as 0 in C++:
myObject *foo = NULL;
Also note that NULL
is defined if you include standard headers, but is not built into the language itself. If NULL
is undefined, you can use 0 instead, or include this:
#ifndef NULL
#define NULL 0
#endif
As an aside, if you really want to set an object, not a pointer, to NULL
, you can read about the Null Object Pattern.
Although this is an old question, I had the same question when using the Standard console version. The answer can be found in the Debian Live manual under the section 10.1 Customizing the live user. It says:
It is also possible to change the default username "user" and the default password "live".
I tried the username user
and password live
and it did work. If you want to run commands as root you can preface each command with sudo
My solution would be create custom filter and use it:
app.filter('with', function() {
return function(items, field) {
var result = {};
angular.forEach(items, function(value, key) {
if (!value.hasOwnProperty(field)) {
result[key] = value;
}
});
return result;
};
});
And in html:
<div ng-repeat="(k,v) in items | with:'secId'">
{{k}} {{v.pos}}
</div>
Try and see if this works:
You have asked two questions, one in the title about the difference between PNG8 and PNG24, which has received a few answers, namely that PNG24 has 8-bit red, green, and blue channels, and PNG-8 has a single 8-bit index into a palette. Naturally, PNG24 usually has a larger filesize than PNG8. Furthermore, PNG8 usually means that it is opaque or has only binary transparency (like GIF); it's defined that way in ImageMagick/GraphicsMagick.
This is an answer to the other one, "I would like to know that if I use either type in my html page, will there be any error? Or is this only quality matter?"
You can put either type on an HTML page and no, this won't cause an error; the files should all be named with the ".png" extension and referred to that way in your HTML. Years ago, early versions of Internet Explorer would not handle PNG with an alpha channel (PNG32) or indexed-color PNG with translucent pixels properly, so it was useful to convert such images to PNG8 (indexed-color with binary transparency conveyed via a PNG tRNS chunk) -- but still use the .png extension, to be sure they would display properly on IE. I think PNG24 was always OK on Internet Explorer because PNG24 is either opaque or has GIF-like single-color transparency conveyed via a PNG tRNS chunk.
The names PNG8 and PNG24 aren't mentioned in the PNG specification, which simply calls them all "PNG". Other names, invented by others, include
There are many more possible combinations including grayscale with 1, 2, 4, 8, or 16-bit samples and indexed PNG with 1, 2, or 4-bit samples (and any of those with transparent or translucent pixels), but those don't have special names.
Just took @roghayeh hosseini (correct) answer and made it in Kotlin for those here in 2017 :)
fun getTopFragment(): Fragment? {
supportFragmentManager.run {
return when (backStackEntryCount) {
0 -> null
else -> findFragmentByTag(getBackStackEntryAt(backStackEntryCount - 1).name)
}
}
}
*This should be called from inside an Activity.
Enjoy :)
WebSockets is definitely the future.
Long polling is a dirty workaround to prevent creating connections for each request like AJAX does -- but long polling was created when WebSockets didn't exist. Now due to WebSockets, long polling is going away.
WebRTC allows for peer-to-peer communication.
I recommend learning WebSockets.
of different communication techniques on the web
AJAX - request
→ response
. Creates a connection to the server, sends request headers with optional data, gets a response from the server, and closes the connection.
Supported in all major browsers.
Long poll - request
→ wait
→ response
. Creates a connection to the server like AJAX does, but maintains a keep-alive connection open for some time (not long though). During connection, the open client can receive data from the server. The client has to reconnect periodically after the connection is closed, due to timeouts or data eof. On server side it is still treated like an HTTP request, same as AJAX, except the answer on request will happen now or some time in the future, defined by the application logic.
support chart (full) | wikipedia
WebSockets - client
↔ server
. Create a TCP connection to the server, and keep it open as long as needed. The server or client can easily close the connection. The client goes through an HTTP compatible handshake process. If it succeeds, then the server and client can exchange data in both directions at any time. It is efficient if the application requires frequent data exchange in both ways. WebSockets do have data framing that includes masking for each message sent from client to server, so data is simply encrypted.
support chart (very good) | wikipedia
WebRTC - peer
↔ peer
. Transport to establish communication between clients and is transport-agnostic, so it can use UDP, TCP or even more abstract layers. This is generally used for high volume data transfer, such as video/audio streaming, where reliability is secondary and a few frames or reduction in quality progression can be sacrificed in favour of response time and, at least, some data transfer. Both sides (peers) can push data to each other independently. While it can be used totally independent from any centralised servers, it still requires some way of exchanging endPoints data, where in most cases developers still use centralised servers to "link" peers. This is required only to exchange essential data for establishing a connection, after which a centralised server is not required.
support chart (medium) | wikipedia
Server-Sent Events - client
← server
. Client establishes persistent and long-term connection to server. Only the server can send data to a client. If the client wants to send data to the server, it would require the use of another technology/protocol to do so. This protocol is HTTP compatible and simple to implement in most server-side platforms. This is a preferable protocol to be used instead of Long Polling. support chart (good, except IE) | wikipedia
The main advantage of WebSockets server-side, is that it is not an HTTP request (after handshake), but a proper message based communication protocol. This enables you to achieve huge performance and architecture advantages. For example, in node.js, you can share the same memory for different socket connections, so they can each access shared variables. Therefore, you don't need to use a database as an exchange point in the middle (like with AJAX or Long Polling with a language like PHP). You can store data in RAM, or even republish between sockets straight away.
People are often concerned about the security of WebSockets. The reality is that it makes little difference or even puts WebSockets as better option. First of all, with AJAX, there is a higher chance of MITM, as each request is a new TCP connection that is traversing through internet infrastructure. With WebSockets, once it's connected it is far more challenging to intercept in between, with additionally enforced frame masking when data is streamed from client to server as well as additional compression, which requires more effort to probe data. All modern protocols support both: HTTP and HTTPS (encrypted).
Remember that WebSockets generally have a very different approach of logic for networking, more like real-time games had all this time, and not like http.
Using @mmacaulay , I came up with this for bool:
// MVC Work around for checkboxes.
bool active = (Request.Form["active"] == "on");
If checked active = true
If unchecked active = false
Here the Kotlin version of Arth Tilvas answer:
fun getMacAddr(): String {
try {
val all = Collections.list(NetworkInterface.getNetworkInterfaces())
for (nif in all) {
if (!nif.getName().equals("wlan0", ignoreCase=true)) continue
val macBytes = nif.getHardwareAddress() ?: return ""
val res1 = StringBuilder()
for (b in macBytes) {
//res1.append(Integer.toHexString(b & 0xFF) + ":");
res1.append(String.format("%02X:", b))
}
if (res1.length > 0) {
res1.deleteCharAt(res1.length - 1)
}
return res1.toString()
}
} catch (ex: Exception) {
}
return "02:00:00:00:00:00"
}
2015-4-22: It looks like an IPython update means that --to pdf
should be used instead of --to latex --post PDF
. There is a related Github issue.
Although this is almost certainly not the OPs issue, you can also get Unable to establish SSL connection
from wget
if you're behind a proxy and don't have HTTP_PROXY
and HTTPS_PROXY
environment variables set correctly. Make sure to set HTTP_PROXY
and HTTPS_PROXY
to point to your proxy.
This is a common situation if you work for a large corporation.
This should help with the new Google Maps:
http://maps.google.com/maps/place/<name>/@<lat>,<long>,15z/data=<mode-value>
E.g.: https://www.google.com/maps/place/Lawyer/@48.8187768,2.3792362,15z/data=!3m1!1e3
References:
https://moz.com/blog/new-google-maps-url-parameters
http://dddavemaps.blogspot.in/2015/07/google-maps-url-tricks.html
Instead of RenderViewToString
I prefer a approach like
return Json(new { Url = Url.Action("Evil", model) });
then you can catch the result in your javascript and do something like
success: function(data) {
$.post(data.Url, function(partial) {
$('#IdOfDivToUpdate').html(partial);
});
}
I think the easiest way to do it is by using Requests module.
import requests
def url_ok(url):
r = requests.head(url)
return r.status_code == 200
ZIP FILE via Cross-platform Java without manifest and META-INF folder:
jar -cMf {yourfile.zip} {yourfolder}
I have kind of similar condition plus my Search Query not limited to particular Object property ( like "John" Search query should be matched with first_name and also with last_name property ). After spending some hours I got this function from Google's Angular project. They have taken care of every possible cases.
/* Seach in Object */
var comparator = function(obj, text) {
if (obj && text && typeof obj === 'object' && typeof text === 'object') {
for (var objKey in obj) {
if (objKey.charAt(0) !== '$' && hasOwnProperty.call(obj, objKey) &&
comparator(obj[objKey], text[objKey])) {
return true;
}
}
return false;
}
text = ('' + text).toLowerCase();
return ('' + obj).toLowerCase().indexOf(text) > -1;
};
var search = function(obj, text) {
if (typeof text == 'string' && text.charAt(0) === '!') {
return !search(obj, text.substr(1));
}
switch (typeof obj) {
case "boolean":
case "number":
case "string":
return comparator(obj, text);
case "object":
switch (typeof text) {
case "object":
return comparator(obj, text);
default:
for (var objKey in obj) {
if (objKey.charAt(0) !== '$' && search(obj[objKey], text)) {
return true;
}
}
break;
}
return false;
case "array":
for (var i = 0; i < obj.length; i++) {
if (search(obj[i], text)) {
return true;
}
}
return false;
default:
return false;
}
};
We can also use .pop:
>>> lst = [23,34,54,45]
>>> remove_element = 23
>>> if remove_element in lst:
... lst.pop(lst.index(remove_element))
...
23
>>> lst
[34, 54, 45]
>>>
You could use the Reflections Project described here
It's quite complete and easy to use.
Brief description from the above website:
Reflections scans your classpath, indexes the metadata, allows you to query it on runtime and may save and collect that information for many modules within your project.
Example:
Reflections reflections = new Reflections(
new ConfigurationBuilder()
.setUrls(ClasspathHelper.forJavaClassPath())
);
Set<Class<?>> types = reflections.getTypesAnnotatedWith(Scannable.class);
Don't use while True and break statements. It's bad programming.
Imagine you come to debug someone else's code and you see a while True on line 1 and then have to trawl your way through another 200 lines of code with 15 break statements in it, having to read umpteen lines of code for each one to work out what actually causes it to get to the break. You'd want to kill them...a lot.
The condition that causes a while loop to stop iterating should always be clear from the while loop line of code itself without having to look elsewhere.
Phil has the "correct" solution, as it has a clear end condition right there in the while loop statement itself.
If you use Java8 or above, you can use with stream() with native.
publicArray.stream()
.map(Object::toString)
.collect(Collectors.joining(" "));
It was displaying some weird characters (​) until I set the charset to UTF-8 in the head of the html file
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
or for HTML5:
<meta charset="UTF-8">
It it is now transparent but still shows in the html when I use the inspector.
Removing all the scripts from the page didn't remove it either.
I tested it for chrome and IE.
public static void main(String[] args) {
System.out.println("is balanced : "+isBalanced("(){}[]<>"));
System.out.println("is balanced : "+isBalanced("({})[]<>"));
System.out.println("is balanced : "+isBalanced("({[]})<>"));
System.out.println("is balanced : "+isBalanced("({[<>]})"));
System.out.println("is balanced : "+isBalanced("({})[<>]"));
System.out.println("is balanced : "+isBalanced("({[}])[<>]"));
System.out.println("is balanced : "+isBalanced("([{})]"));
System.out.println("is balanced : "+isBalanced("[({}])"));
System.out.println("is balanced : "+isBalanced("[(<{>})]"));
System.out.println("is balanced : "+isBalanced("["));
System.out.println("is balanced : "+isBalanced("]"));
System.out.println("is balanced : "+isBalanced("asdlsa"));
}
private static boolean isBalanced(String brackets){
char[] bracketsArray = brackets.toCharArray();
Stack<Character> stack = new Stack<Character>();
Map<Character, Character> openingClosingMap = initOpeningClosingMap();
for (char bracket : bracketsArray) {
if(openingClosingMap.keySet().contains(bracket)){
stack.push(bracket);
}else if(openingClosingMap.values().contains(bracket)){
if(stack.isEmpty() || openingClosingMap.get(stack.pop())!=bracket){
return false;
}
}else{
System.out.println("Only < > ( ) { } [ ] brackets are allowed .");
return false;
}
}
return stack.isEmpty();
}
private static Map<Character, Character> initOpeningClosingMap() {
Map<Character, Character> openingClosingMap = new HashMap<Character, Character>();
openingClosingMap.put(Character.valueOf('('), Character.valueOf(')'));
openingClosingMap.put(Character.valueOf('{'), Character.valueOf('}'));
openingClosingMap.put(Character.valueOf('['), Character.valueOf(']'));
openingClosingMap.put(Character.valueOf('<'), Character.valueOf('>'));
return openingClosingMap;
}
Simplifying and making readable. Using One Map only and minimum conditions to get desired result.
In the current version of Android Studio (v1.0.2) you can simply add a landscape layout by clicking on the button in the visual editor shown in the screenshot below. Select "Create Landscape Variation"
version note: this is no longer value in iOS 9 & 10, as they support custom keyboard sizes.
This depends on the model and the QuickType bar:
Like Obediah Stane said, it's necessary to create your own format
method. But I would change a few things:
Create a subclass directly derived from Formatter
, not from SimpleFormatter
. The SimpleFormatter
has nothing to add anymore.
Be careful with creating a new Date
object! You should make sure to represent the date of the LogRecord
. When creating a new Date
with the default constructor, it will represent the date and time the Formatter
processes the LogRecord
, not the date that the LogRecord
was created.
The following class can be used as formatter in a Handler
, which in turn can be added to the Logger
. Note that it ignores all class and method information available in the LogRecord
.
import java.io.PrintWriter;
import java.io.StringWriter;
import java.util.Date;
import java.util.logging.Formatter;
import java.util.logging.LogRecord;
public final class LogFormatter extends Formatter {
private static final String LINE_SEPARATOR = System.getProperty("line.separator");
@Override
public String format(LogRecord record) {
StringBuilder sb = new StringBuilder();
sb.append(new Date(record.getMillis()))
.append(" ")
.append(record.getLevel().getLocalizedName())
.append(": ")
.append(formatMessage(record))
.append(LINE_SEPARATOR);
if (record.getThrown() != null) {
try {
StringWriter sw = new StringWriter();
PrintWriter pw = new PrintWriter(sw);
record.getThrown().printStackTrace(pw);
pw.close();
sb.append(sw.toString());
} catch (Exception ex) {
// ignore
}
}
return sb.toString();
}
}
From ?read.table
: The number of data columns is determined by looking at the first five lines of input (or the whole file if it has less than five lines), or from the length of col.names if it is specified and is longer. This could conceivably be wrong if fill or blank.lines.skip are true, so specify col.names if necessary.
So, perhaps your data file isn't clean. Being more specific will help the data import:
d = read.table("foobar.txt",
sep="\t",
col.names=c("id", "name"),
fill=FALSE,
strip.white=TRUE)
will specify exact columns and fill=FALSE
will force a two column data frame.
Kasperd asked in a comment of the accepted answer:
The Java and C examples use quite different register names. Are both example using the AMD64 ISA?
xor edx, edx
xor eax, eax
.L2:
mov ecx, edx
imul ecx, edx
add edx, 1
lea eax, [rax+rcx*2]
cmp edx, 1000000000
jne .L2
I don't have enough reputation to answer this in the comments, but these are the same ISA. It's worth pointing out that the GCC version uses 32-bit integer logic and the JVM compiled version uses 64-bit integer logic internally.
R8 to R15 are just new X86_64 registers. EAX to EDX are the lower parts of the RAX to RDX general purpose registers. The important part in the answer is that the GCC version is not unrolled. It simply executes one round of the loop per actual machine code loop. While the JVM version has 16 rounds of the loop in one physical loop (based on rustyx answer, I did not reinterpret the assembly). This is one of the reasons why there are more registers being used since the loop body is actually 16 times longer.
I am working with an API with a lot of functions get as an input a char*
.
I have created a small class to face this kind of problem, I have implemented the RAII idiom.
class DeepString
{
DeepString(const DeepString& other);
DeepString& operator=(const DeepString& other);
char* internal_;
public:
explicit DeepString( const string& toCopy):
internal_(new char[toCopy.size()+1])
{
strcpy(internal_,toCopy.c_str());
}
~DeepString() { delete[] internal_; }
char* str() const { return internal_; }
const char* c_str() const { return internal_; }
};
And you can use it as:
void aFunctionAPI(char* input);
// other stuff
aFunctionAPI("Foo"); //this call is not safe. if the function modified the
//literal string the program will crash
std::string myFoo("Foo");
aFunctionAPI(myFoo.c_str()); //this is not compiling
aFunctionAPI(const_cast<char*>(myFoo.c_str())); //this is not safe std::string
//implement reference counting and
//it may change the value of other
//strings as well.
DeepString myDeepFoo(myFoo);
aFunctionAPI(myFoo.str()); //this is fine
I have called the class DeepString
because it is creating a deep and unique copy (the DeepString
is not copyable) of an existing string.
Well I guess you can use checked="false". That is the html way to leave a checkbox unchecked. You can refer to http://www.w3schools.com/jsref/dom_obj_checkbox.asp.
Although the question was for SQL Server 2008 R2, in case someone is reading this with version 2012 and above, since then it became much easier by the use of FORMAT.
You can either pass a standard numeric format string or a custom numeric format string as the format argument (thank Vadim Ovchinnikov for this hint).
For this question for example a code like
DECLARE @myInt INT = 1;
-- One way using a standard numeric format string
PRINT FORMAT(@myInt,'D3');
-- Other way using a custom numeric format string
PRINT FORMAT(@myInt,'00#');
outputs
001
001
One of the first differences that I can recall from top of my head are multiple domains running in the same server, partial resource retrieval, this allows you to retrieve and speed up the download of a resource (it's what almost every download accelerator does).
If you want to develop an application like a website or similar, you don't need to worry too much about the differences but you should know the difference between GET
and POST
verbs at least.
Now if you want to develop a browser then yes, you will have to know the complete protocol as well as if you are trying to develop a HTTP server.
If you are only interested in knowing the HTTP protocol I would recommend you starting with HTTP/1.1 instead of 1.0.
Consider this code,
int some_int = 100;
while(some_int == 100)
{
//your code
}
When this program gets compiled, the compiler may optimize this code, if it finds that the program never ever makes any attempt to change the value of some_int
, so it may be tempted to optimize the while
loop by changing it from while(some_int == 100)
to something which is equivalent to while(true)
so that the execution could be fast (since the condition in while
loop appears to be true
always). (if the compiler doesn't optimize it, then it has to fetch the value of some_int
and compare it with 100, in each iteration which obviously is a little bit slow.)
However, sometimes, optimization (of some parts of your program) may be undesirable, because it may be that someone else is changing the value of some_int
from outside the program which compiler is not aware of, since it can't see it; but it's how you've designed it. In that case, compiler's optimization would not produce the desired result!
So, to ensure the desired result, you need to somehow stop the compiler from optimizing the while
loop. That is where the volatile
keyword plays its role. All you need to do is this,
volatile int some_int = 100; //note the 'volatile' qualifier now!
In other words, I would explain this as follows:
volatile
tells the compiler that,
"Hey compiler, I'm volatile and, you know, I can be changed by some XYZ that you're not even aware of. That XYZ could be anything. Maybe some alien outside this planet called program. Maybe some lightning, some form of interrupt, volcanoes, etc can mutate me. Maybe. You never know who is going to change me! So O you ignorant, stop playing an all-knowing god, and don't dare touch the code where I'm present. Okay?"
Well, that is how volatile
prevents the compiler from optimizing code. Now search the web to see some sample examples.
Quoting from the C++ Standard ($7.1.5.1/8)
[..] volatile is a hint to the implementation to avoid aggressive optimization involving the object because the value of the object might be changed by means undetectable by an implementation.[...]
Related topic:
Does making a struct volatile make all its members volatile?
In case anyone still facing same problem be sure to check your your view Page source in your browser to check whether all the jquery and bootstrap files are loaded and paths to the file are correct. Most important! make sure to use latest stable jquery file.
Swift 3 compatible
// MARK: - UIDevice Extension -
private let DeviceList = [
/* iPod 5 */ "iPod5,1": "iPod Touch 5",
/* iPhone 4 */ "iPhone3,1": "iPhone 4", "iPhone3,2": "iPhone 4", "iPhone3,3": "iPhone 4",
/* iPhone 4S */ "iPhone4,1": "iPhone 4S",
/* iPhone 5 */ "iPhone5,1": "iPhone 5", "iPhone5,2": "iPhone 5",
/* iPhone 5C */ "iPhone5,3": "iPhone 5C", "iPhone5,4": "iPhone 5C",
/* iPhone 5S */ "iPhone6,1": "iPhone 5S", "iPhone6,2": "iPhone 5S",
/* iPhone 6 */ "iPhone7,2": "iPhone 6",
/* iPhone 6 Plus */ "iPhone7,1": "iPhone 6 Plus",
/* iPhone 6S */ "iPhone8,1": "iPhone 6S",
/* iPhone 6S Plus */ "iPhone8,2": "iPhone 6S Plus",
/* iPhone SE */ "iPhone8,4": "iPhone SE",
/* iPhone 7 */ "iPhone9,1": "iPhone 7",
/* iPhone 7 */ "iPhone9,3": "iPhone 7",
/* iPhone 7 Plus */ "iPhone9,2": "iPhone 7 Plus",
/* iPhone 7 Plus */ "iPhone9,4": "iPhone 7 Plus",
/* iPad 2 */ "iPad2,1": "iPad 2", "iPad2,2": "iPad 2", "iPad2,3": "iPad 2", "iPad2,4": "iPad 2",
/* iPad 3 */ "iPad3,1": "iPad 3", "iPad3,2": "iPad 3", "iPad3,3": "iPad 3",
/* iPad 4 */ "iPad3,4": "iPad 4", "iPad3,5": "iPad 4", "iPad3,6": "iPad 4",
/* iPad Air */ "iPad4,1": "iPad Air", "iPad4,2": "iPad Air", "iPad4,3": "iPad Air",
/* iPad Air 2 */ "iPad5,1": "iPad Air 2", "iPad5,3": "iPad Air 2", "iPad5,4": "iPad Air 2",
/* iPad Mini */ "iPad2,5": "iPad Mini 1", "iPad2,6": "iPad Mini 1", "iPad2,7": "iPad Mini 1",
/* iPad Mini 2 */ "iPad4,4": "iPad Mini 2", "iPad4,5": "iPad Mini 2", "iPad4,6": "iPad Mini 2",
/* iPad Mini 3 */ "iPad4,7": "iPad Mini 3", "iPad4,8": "iPad Mini 3", "iPad4,9": "iPad Mini 3",
/* iPad Pro 12.9 */ "iPad6,7": "iPad Pro 12.9", "iPad6,8": "iPad Pro 12.9",
/* iPad Pro 9.7 */ "iPad6,3": "iPad Pro 9.7", "iPad6,4": "iPad Pro 9.7",
/* Simulator */ "x86_64": "Simulator", "i386": "Simulator"
]
extension UIDevice {
static var modelName: String {
var systemInfo = utsname()
uname(&systemInfo)
let machine = systemInfo.machine
let mirror = Mirror(reflecting: machine)
var identifier = ""
for child in mirror.children {
if let value = child.value as? Int8, value != 0 {
identifier += String(UnicodeScalar(UInt8(value)))
}
}
return DeviceList[identifier] ?? identifier
}
static var isIphone4: Bool {
return modelName == "iPhone 5" || modelName == "iPhone 5C" || modelName == "iPhone 5S" || UIDevice.isSimulatorIPhone4
}
static var isIphone5: Bool {
return modelName == "iPhone 4S" || modelName == "iPhone 4" || UIDevice.isSimulatorIPhone5
}
static var isIphone6: Bool {
return modelName == "iPhone 6" || UIDevice.isSimulatorIPhone6
}
static var isIphone6Plus: Bool {
return modelName == "iPhone 6 Plus" || UIDevice.isSimulatorIPhone6Plus
}
static var isIpad: Bool {
if UIDevice.current.model.contains("iPad") {
return true
}
return false
}
static var isIphone: Bool {
return !self.isIpad
}
/// Check if current device is iPhone4S (and earlier) relying on screen heigth
static var isSimulatorIPhone4: Bool {
return UIDevice.isSimulatorWithScreenHeigth(480)
}
/// Check if current device is iPhone5 relying on screen heigth
static var isSimulatorIPhone5: Bool {
return UIDevice.isSimulatorWithScreenHeigth(568)
}
/// Check if current device is iPhone6 relying on screen heigth
static var isSimulatorIPhone6: Bool {
return UIDevice.isSimulatorWithScreenHeigth(667)
}
/// Check if current device is iPhone6 Plus relying on screen heigth
static var isSimulatorIPhone6Plus: Bool {
return UIDevice.isSimulatorWithScreenHeigth(736)
}
private static func isSimulatorWithScreenHeigth(_ heigth: CGFloat) -> Bool {
let screenSize: CGRect = UIScreen.main.bounds
return modelName == "Simulator" && screenSize.height == heigth
}
}
char * strdup(const char * s)
{
size_t len = 1+strlen(s);
char *p = malloc(len);
return p ? memcpy(p, s, len) : NULL;
}
Maybe the code is a bit faster than with strcpy()
as the \0
char doesn't need to be searched again (It already was with strlen()
).
Simple HTML trick to get this :
<link href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css" rel="stylesheet"/>_x000D_
<div class="row" >_x000D_
_x000D_
<div class="col-md-6">_x000D_
<div class="row">_x000D_
<div class="col-md-4" >_x000D_
<label for="hours">Hours</label>_x000D_
<select class="form-control" required>_x000D_
<option> </option>_x000D_
<option value="1"> 1 </option>_x000D_
<option value="2"> 2 </option>_x000D_
<option value="3"> 3 </option>_x000D_
<option value="4"> 4 </option>_x000D_
<option value="5"> 5 </option>_x000D_
<option value="6"> 6 </option>_x000D_
<option value="7"> 7 </option>_x000D_
<option value="8"> 8 </option>_x000D_
<option value="9"> 9 </option>_x000D_
<option value="10"> 10 </option>_x000D_
<option value="11"> 11 </option>_x000D_
<option value="12"> 12 </option>_x000D_
</select>_x000D_
</div>_x000D_
<div class="col-md-4" >_x000D_
<label for="minutes">Minutes</label>_x000D_
<select class="form-control" required="">_x000D_
<option selected disabled> </option>_x000D_
<option value="00"> 00 </option>_x000D_
<option value="10"> 10 </option>_x000D_
<option value="20"> 20 </option>_x000D_
<option value="30"> 30 </option>_x000D_
<option value="40"> 40 </option>_x000D_
<option value="50"> 50 </option>_x000D_
</select>_x000D_
</div>_x000D_
<div class="col-md-4" >_x000D_
<label for="hours">Select Meridiem</label>_x000D_
<select class="form-control" required="" >_x000D_
<option selected="" value="AM"> AM </option>_x000D_
<option value="PM"> PM </option>_x000D_
</select>_x000D_
</div>_x000D_
</div></div>_x000D_
</div>
_x000D_
Typically it because of upgrading JRE.
It changes symlinks into C:\ProgramData\Oracle\Java\javapath\
Intall JDK - it will fix this.
1st -- go get
will refuse to authenticate on the command line. So you need to cache the credentials in git. Because I use osx I can use osxkeychain credential helper.
2nd For me, I have 2FA enabled and thus could not use my password to auth. Instead I had to generate a personal access token to use in place of the password.
git clone https://github.com/user/private_repo
and used your github.com username for username and the generated personal access token for password.Removed the just cloned repo and retest to ensure creds were cached -- git clone https://github.com/user/private_repo
and this time wasnt asked for creds.
When setting a Selected row of a DataGridView at load time, consider handling this in the DataBindingComplete event, because it can be overwritten by default.
org.mockito.exceptions.misusing.UnfinishedStubbingException:
Unfinished stubbing detected here:
E.g. thenReturn() may be missing.
For mocking of void methods try out below:
//Kotlin Syntax
Mockito.`when`(voidMethodCall())
.then {
Unit //Do Nothing
}
When you use scp you have to tell the host name and ip address from where you want to copy the file. For instance, if you are at the remote host and you want to transfer the file to your pc you may use something like this:
scp -P[portnumber] myfile_at_remote_host [user]@[your_ip_address]:/your/path/
Example:
scp -P22 table [email protected]:/home/me/Desktop/
On the other hand, if you are at your are actually on your machine you may use something like this:
scp -P[portnumber] [remote_login]@[remote's_ip_address]:/remote/path/myfile_at_remote_host /your/path/
Example:
scp -P22 [fake_user]@222.222.222.222:/remote/path/table /home/me/Desktop/
format_train_y=[]
for n in train_y:
format_train_y.append(n[0])
I was trying to call setErrors()
inside a ngModelChange handler in a template form. It did not work until I waited one tick with setTimeout()
:
template:
<input type="password" [(ngModel)]="user.password" class="form-control"
id="password" name="password" required (ngModelChange)="checkPasswords()">
<input type="password" [(ngModel)]="pwConfirm" class="form-control"
id="pwConfirm" name="pwConfirm" required (ngModelChange)="checkPasswords()"
#pwConfirmModel="ngModel">
<div [hidden]="pwConfirmModel.valid || pwConfirmModel.pristine" class="alert-danger">
Passwords do not match
</div>
component:
@ViewChild('pwConfirmModel') pwConfirmModel: NgModel;
checkPasswords() {
if (this.pwConfirm.length >= this.user.password.length &&
this.pwConfirm !== this.user.password) {
console.log('passwords do not match');
// setErrors() must be called after change detection runs
setTimeout(() => this.pwConfirmModel.control.setErrors({'nomatch': true}) );
} else {
// to clear the error, we don't have to wait
this.pwConfirmModel.control.setErrors(null);
}
}
Gotchas like this are making me prefer reactive forms.
all you are right! other way to getting !
https://cdnjs.cloudflare.com/ajax/libs/bootstrap-datepicker/1.9.0/locales/bootstrap-datepicker.ru.min.js
You can find out all languages on there https://cdnjs.com/libraries/bootstrap-datepicker
https://labs.maarch.org/maarch/maarchRM/commit/3299d1e7ed25018b48715e16a42d52c288b4da3e
If the JSON source file is pretty big, may want to consider the asynchronous route via native async / await approach with Node.js 8.0 as follows
const fs = require('fs')
const fsReadFile = (fileName) => {
fileName = `${__dirname}/${fileName}`
return new Promise((resolve, reject) => {
fs.readFile(fileName, 'utf8', (error, data) => {
if (!error && data) {
resolve(data)
} else {
reject(error);
}
});
})
}
async function parseJSON(fileName) {
try {
return JSON.parse(await fsReadFile(fileName));
} catch (err) {
return { Error: `Something has gone wrong: ${err}` };
}
}
parseJSON('veryBigFile.json')
.then(res => console.log(res))
.catch(err => console.log(err))
Try this:
Encoding iso = Encoding.GetEncoding("ISO-8859-1");
Encoding utf8 = Encoding.UTF8;
byte[] utfBytes = utf8.GetBytes(Message);
byte[] isoBytes = Encoding.Convert(utf8,iso,utfBytes);
string msg = iso.GetString(isoBytes);
I prefer a mutex solution similar to the following. As this way it re-focuses on the app if it is already loaded
using System.Threading;
[DllImport("user32.dll")]
[return: MarshalAs(UnmanagedType.Bool)]
static extern bool SetForegroundWindow(IntPtr hWnd);
/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main()
{
bool createdNew = true;
using (Mutex mutex = new Mutex(true, "MyApplicationName", out createdNew))
{
if (createdNew)
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
Application.Run(new MainForm());
}
else
{
Process current = Process.GetCurrentProcess();
foreach (Process process in Process.GetProcessesByName(current.ProcessName))
{
if (process.Id != current.Id)
{
SetForegroundWindow(process.MainWindowHandle);
break;
}
}
}
}
}
Gson allows for one of the simplest possible solutions. Compared to similar APIs like Jackson or svenson, Gson by default doesn't even need the unused JSON elements to have bindings available in the Java structure. Specific to the question asked, here's a working solution.
import com.google.gson.Gson;
public class Foo
{
static String jsonInput =
"{" +
"\"name\":\"John\"," +
"\"age\":\"20\"," +
"\"address\":\"some address\"," +
"\"someobject\":" +
"{" +
"\"field\":\"value\"" +
"}" +
"}";
String age;
public static void main(String[] args) throws Exception
{
Gson gson = new Gson();
Foo thing = gson.fromJson(jsonInput, Foo.class);
if (thing.age != null)
{
System.out.println("age is " + thing.age);
}
else
{
System.out.println("age element not present or value is null");
}
}
}
The user-agent
should be specified as a field in the header.
Here is a list of HTTP header fields, and you'd probably be interested in request-specific fields, which includes User-Agent
.
The simplest way to do what you want is to create a dictionary and specify your headers directly, like so:
import requests
url = 'SOME URL'
headers = {
'User-Agent': 'My User Agent 1.0',
'From': '[email protected]' # This is another valid field
}
response = requests.get(url, headers=headers)
Older versions of requests
clobbered default headers, so you'd want to do the following to preserve default headers and then add your own to them.
import requests
url = 'SOME URL'
# Get a copy of the default headers that requests would use
headers = requests.utils.default_headers()
# Update the headers with your custom ones
# You don't have to worry about case-sensitivity with
# the dictionary keys, because default_headers uses a custom
# CaseInsensitiveDict implementation within requests' source code.
headers.update(
{
'User-Agent': 'My User Agent 1.0',
}
)
response = requests.get(url, headers=headers)
You can always escape the reserved keyword if you still want to make your query work!!
Just replace end with `end`
Here is the list of reserved keywords https://cwiki.apache.org/confluence/display/Hive/LanguageManual+DDL
CREATE EXTERNAL TABLE moveProjects (cid string, `end` string, category string)
STORED BY 'org.apache.hadoop.hive.dynamodb.DynamoDBStorageHandler'
TBLPROPERTIES ("dynamodb.table.name" = "Projects",
"dynamodb.column.mapping" = "cid:cid,end:end,category:category");
The above answers require you to malloc a new stream object.
public <T>
boolean containsByLambda(Collection<? extends T> c, Predicate<? super T> p) {
for (final T z : c) {
if (p.test(z)) {
return true;
}
}
return false;
}
public boolean containsTabById(TabPane tabPane, String id) {
return containsByLambda(tabPane.getTabs(), z -> z.getId().equals(id));
}
...
if (containsTabById(tabPane, idToCheck))) {
...
}
Simplest way is to use dimensions in % or em. Just change the base font size everything will change.
Less
@media (max-width: @screen-xs) {
body{font-size: 10px;}
}
@media (max-width: @screen-sm) {
body{font-size: 14px;}
}
h5{
font-size: 1.4rem;
}
Look at all the ways at https://stackoverflow.com/a/21981859/406659
You could use viewport units (vh,vw...) but they dont work on Android < 4.4
You are missing setter for salt
property as indicated by the exception
Please add the setter as
public void setSalt(long salt) {
this.salt=salt;
}
The fragment identifier (also known as: Fragment IDs, Anchor Identifiers, Named Anchors) introduced by a hash mark # is the optional last part of a URL for a document. It is typically used to identify a portion of that document.
<a href="http://www.someuri.com/page#fragment">Link to fragment identifier</a>
Syntax for URIs also allows an optional query part introduced by a question mark ?. In URIs with a query and a fragment the fragment follows the query.
<a href="http://www.someuri.com/page?query=1#fragment">Link to fragment with a query</a>
When a Web browser requests a resource from a Web server, the agent sends the URI to the server, but does not send the fragment. Instead, the agent waits for the server to send the resource, and then the agent (Web browser) processes the resource according to the document type and fragment value.
Named Anchors <a name="fragment">
are deprecated in XHTML 1.0, the ID attribute is the suggested replacement. <div id="fragment"></div>
this command gives you a description of your operating system
cat /etc/os-release
In my case i have changed the root folder in which the Eclipse project were stored. I have discovered tha when i have runned :
cat .plugins/org.eclip.resources/.projects/<projectname>/.location
I faced a similar problem, trying to test if jQuery is already present on a page, and if not force it's load, and then execute a function. I tried with @David Hellsing workaround, but with no chance for my needs. In fact, the onload
instruction was immediately evaluated, and then the $
usage inside this function was not yet possible (yes, the huggly "$ is not a function." ^^).
So, I referred to this article : https://developer.mozilla.org/fr/docs/Web/Events/load and attached a event listener to my script object.
var script = document.createElement('script');
script.type = "text/javascript";
script.addEventListener("load", function(event) {
console.log("script loaded :)");
onjqloaded();
});
script.src = "https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js";
document.getElementsByTagName('head')[0].appendChild(script);
For my needs, it works fine now. Hope this can help others :)
A TCP connection is specified by the tuple (source IP, source port, destination IP, destination port).
The reason why there is a TIME_WAIT state following session shutdown is because there may still be live packets out in the network on their way to you (or from you which may solicit a response of some sort). If you were to re-create that same tuple and one of those packets showed up, it would be treated as a valid packet for your connection (and probably cause an error due to sequencing).
So the TIME_WAIT time is generally set to double the packets maximum age. This value is the maximum age your packets will be allowed to get to before the network discards them.
That guarantees that, before you're allowed to create a connection with the same tuple, all the packets belonging to previous incarnations of that tuple will be dead.
That generally dictates the minimum value you should use. The maximum packet age is dictated by network properties, an example being that satellite lifetimes are higher than LAN lifetimes since the packets have much further to go.
I've just had this issue with a document loaded from MongoDB using Mongoose.
When running console.log()
on the whole object, all the document fields (as stored in the db) would show up. However some individual property accessors would return undefined
, when others (including _id
) worked fine.
Turned out that property accessors only works for those fields specified in my mongoose.Schema(...)
definition, whereas console.log()
and JSON.stringify()
returns all fields stored in the db.
Solution (if you're using Mongoose): make sure all your db fields are defined in mongoose.Schema(...)
.
ID is an attribute, you can set it with the attr function:
$(element).attr('id', 'newID');
I'm not sure what you mean about adding IDs since an element can only have one identifier and this identifier must be unique.
Take a look at the FluentEmail library. I've blogged about it here
You have a nice and fluent api for your needs:
Email.FromDefault()
.To("[email protected]")
.Subject("New order has arrived!")
.Body("The order details are…")
.Send();
<system.webServer>
<httpErrors errorMode="DetailedLocalOnly">
<remove statusCode="404" subStatusCode="-1" />
<error statusCode="404" prefixLanguageFilePath="" path="your page" responseMode="Redirect" />
</httpErrors>
</system.webServer>
To get an .exe with NASM'compiler and Visual Studio's linker this code works fine:
global WinMain
extern ExitProcess ; external functions in system libraries
extern MessageBoxA
section .data
title: db 'Win64', 0
msg: db 'Hello world!', 0
section .text
WinMain:
sub rsp, 28h
mov rcx, 0 ; hWnd = HWND_DESKTOP
lea rdx,[msg] ; LPCSTR lpText
lea r8,[title] ; LPCSTR lpCaption
mov r9d, 0 ; uType = MB_OK
call MessageBoxA
add rsp, 28h
mov ecx,eax
call ExitProcess
hlt ; never here
If this code is saved on e.g. "test64.asm", then to compile:
nasm -f win64 test64.asm
Produces "test64.obj" Then to link from command prompt:
path_to_link\link.exe test64.obj /subsystem:windows /entry:WinMain /libpath:path_to_libs /nodefaultlib kernel32.lib user32.lib /largeaddressaware:no
where path_to_link could be C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\bin or wherever is your link.exe program in your machine, path_to_libs could be C:\Program Files (x86)\Windows Kits\8.1\Lib\winv6.3\um\x64 or wherever are your libraries (in this case both kernel32.lib and user32.lib are on the same place, otherwise use one option for each path you need) and the /largeaddressaware:no option is necessary to avoid linker's complain about addresses to long (for user32.lib in this case). Also, as it is done here, if Visual's linker is invoked from command prompt, it is necessary to setup the environment previously (run once vcvarsall.bat and/or see MS C++ 2010 and mspdb100.dll).
Now I realize that the compiler won't let me return a set of anonymous types since it's expecting Dogs, but is there a way to return this without having to create a custom type?
Use use object to return a list of Anonymous types without creating a custom type. This will work without the compiler error (in .net 4.0). I returned the list to the client and then parsed it on JavaScript:
public object GetDogsWithBreedNames()
{
var db = new DogDataContext(ConnectString);
var result = from d in db.Dogs
join b in db.Breeds on d.BreedId equals b.BreedId
select new
{
Name = d.Name,
BreedName = b.BreedName
};
return result;
}
I see two possible situations here. First, you want to know if there is a SQL standard for this, that you can use in general regardless of the database. No, there is not. Second, you want to know with regard to a specific dbms product. Then you need to identify it. But I imagine the most likely answer is that you'll get back something like "a.id, b.id" since that's how you'd need to identify the columns in your SQL expression. And the easiest way to find out what the default is, is just to submit such a query and see what you get back. If you want to specify what prefix comes before the dot, you can use "SELECT * FROM a AS my_alias", for instance.
This is more of a warning than an answer.
Having seen in the other answers my_list = [None] * 10
, I was tempted and set up an array like this speakers = [['','']] * 10
and came to regret it immensely as the resulting list
did not behave as I thought it should.
I resorted to:
speakers = []
for i in range(10):
speakers.append(['',''])
As [['','']] * 10
appears to create an list
where subsequent elements are a copy of the first element.
for example:
>>> n=[['','']]*10
>>> n
[['', ''], ['', ''], ['', ''], ['', ''], ['', ''], ['', ''], ['', ''], ['', ''], ['', ''], ['', '']]
>>> n[0][0] = "abc"
>>> n
[['abc', ''], ['abc', ''], ['abc', ''], ['abc', ''], ['abc', ''], ['abc', ''], ['abc', ''], ['abc', ''], ['abc', ''], ['abc', '']]
>>> n[0][1] = "True"
>>> n
[['abc', 'True'], ['abc', 'True'], ['abc', 'True'], ['abc', 'True'], ['abc', 'True'], ['abc', 'True'], ['abc', 'True'], ['abc', 'True'], ['abc', 'True'], ['abc', 'True']]
Whereas with the .append
option:
>>> n=[]
>>> for i in range(10):
... n.append(['',''])
...
>>> n
[['', ''], ['', ''], ['', ''], ['', ''], ['', ''], ['', ''], ['', ''], ['', ''], ['', ''], ['', '']]
>>> n[0][0] = "abc"
>>> n
[['abc', ''], ['', ''], ['', ''], ['', ''], ['', ''], ['', ''], ['', ''], ['', ''], ['', ''], ['', '']]
>>> n[0][1] = "True"
>>> n
[['abc', 'True'], ['', ''], ['', ''], ['', ''], ['', ''], ['', ''], ['', ''], ['', ''], ['', ''], ['', '']]
I'm sure that the accepted answer by ninjagecko does attempt to mention this, sadly I was too thick to understand.
Wrapping up, take care!
A concise ES6 approach:
fetch('https://example.com?' + new URLSearchParams({
foo: 'value',
bar: 2,
}))
URLSearchParams's toString() function will convert the query args into a string that can be appended onto the URL. In this example, toString() is called implicitly when it gets concatenated with the URL. You will likely want to call toString() explicitly to improve readability.
IE does not support URLSearchParams (or fetch), but there are polyfills available.
If using node, you can add the fetch API through a package like node-fetch. URLSearchParams comes with node, and can be found as a global object since version 10. In older version you can find it at require('url').URLSearchParams
.
Well, I can't see Tony's solution...so I have to handle it myself...
If you don't need version_key, you can just:
var UserSchema = new mongoose.Schema({
nickname: String,
reg_time: {type: Date, default: Date.now}
}, {
versionKey: false // You should be aware of the outcome after set to false
});
Setting the versionKey to false means the document is no longer versioned.
This is problematic if the document contains an array of subdocuments. One of the subdocuments could be deleted, reducing the size of the array. Later on, another operation could access the subdocument in the array at it's original position.
Since the array is now smaller, it may accidentally access the wrong subdocument in the array.
The versionKey solves this by associating the document with the a versionKey, used by mongoose internally to make sure it accesses the right collection version.
More information can be found at: http://aaronheckmann.blogspot.com/2012/06/mongoose-v3-part-1-versioning.html
add true in the second param.
Directory.Delete(path, true);
It will remove all.
For the datatype Double
to int
, you can use the following:
Double double = 5.00;
int integer = double.intValue();
Try this CSS
input[type=checkbox] {width:100px; height:100px;}
It will give consistent behavior for add/remove operations. But while iterating you have to explicitly synchronized. Refer this link
It means that the method accepts a variable number of arguments ("varargs") of type JID
. Within the method, recipientJids
is presented.
This is handy for cases where you've a method that can optionally handle more than one argument in a natural way, and allows you to write calls which can pass one, two or three parameters to the same method, without having the ugliness of creating an array on the fly.
It also enables idioms such as sprintf
from C; see String.format()
, for example.
You can convert BigDecimal
to double
using .doubleValue()
. But believe me, don't use it if you have currency manipulations. It should always be performed on BigDecimal
objects directly. Precision loss in these calculations are big time problems in currency related calculations.
First, Remember that this logfile can grow very large on a busy server.
For mysql < 5.1.29:
To enable the query log, put this in /etc/my.cnf
in the [mysqld]
section
log = /path/to/query.log #works for mysql < 5.1.29
Also, to enable it from MySQL console
SET general_log = 1;
See http://dev.mysql.com/doc/refman/5.1/en/query-log.html
For mysql 5.1.29+
With mysql 5.1.29+ , the log
option is deprecated. To specify the logfile and enable logging, use this in my.cnf in the [mysqld]
section:
general_log_file = /path/to/query.log
general_log = 1
Alternately, to turn on logging from MySQL console (must also specify log file location somehow, or find the default location):
SET global general_log = 1;
Also note that there are additional options to log only slow queries, or those which do not use indexes.
If using Visual Studio 2010 you can right-click on the project for the service, and select properties
. Then select the Web
tab. Under the Servers
section you can configure the URL. There is also a button to create the virtual directory.
Since dates correspond to a numeric value and a starting date, you indeed need the day. If you really need your data to be in Date format, you can just fix the day to the first of each month manually by pasting it to the date:
month <- "2009-03"
as.Date(paste(month,"-01",sep=""))
#include <stdio.h>
int main()
{
int a, b;
printf("Enter A :");
scanf("%d",&a);
printf("Enter B :");
scanf("%d",&b);
a ^= b;
b ^= a;
a ^= b;
printf("\nValue of A=%d B=%d ",a,b);
return 1;
}
If it's an object method, you need to pass the object to CallObjectMethod
:
jobject result = env->CallObjectMethod(obj, messageMe, jstr);
What you were doing was the equivalent of jstr.messageMe()
.
Since your is a void method, you should call:
env->CallVoidMethod(obj, messageMe, jstr);
If you want to return a result, you need to change your JNI signature (the ()V
means a method of void
return type) and also the return type in your Java code.
Whilst I know that this question is fairly old, but it's a commonly occurring question...
There is both a reason and a distinct need for profanity filters (see Wikipedia entry here), but they often fall short of being 100% accurate for very distinct reasons; Context and accuracy.
It depends (wholly) on what you're trying to achieve - at it's most basic, you're probably trying to cover the "seven dirty words" and then some... Some businesses need to filter the most basic of profanity: basic swear words, URLs or even personal information and so on, but others need to prevent illicit account naming (Xbox live is an example) or far more...
User generated content doesn't just contain potential swear words, it can also contain offensive references to:
And potentially, in multiple languages. Shutterstock has developed basic dirty-words lists in 10 languages to date, but it's still basic and very much oriented towards their 'tagging' needs. There are a number of other lists available on the web.
I agree with the accepted answer that it's not a defined science and as language is a continually evolving challenge but one where a 90% catch rate is better than 0%. It depends purely on your goals - what you're trying to achieve, the level of support you have and how important it is to remove profanities of different types.
In building a filter, you need to consider the following elements and how they relate to your project:
You can easily build a profanity filter that captures 90%+ of profanities, but you'll never hit 100%. It's just not possible. The closer you want to get to 100%, the harder it becomes... Having built a complex profanity engine in the past that dealt with more than 500K realtime messages per day, I'd offer the following advice:
A basic filter would involve:
A moderately complex filer would involve, (In addition to a basic filter):
A complex filter would involve a number of the following (In addition to a moderate filter):
Use JOIN to join the subqueries and use ON to say where the rows from each subquery must match:
SELECT T1.col_a, T1.col_b, T2.col_c
FROM (SELECT col_a, col_b, ...etc...) AS T1
JOIN (SELECT col_a, col_c, ...etc...) AS T2
ON T1.col_a = T2.col_a
If there are some values of col_a that are in T1 but not in T2, you can use a LEFT OUTER JOIN instead.
@Robino was suggesting to add some tests which make sense, so here is a simple benchmark between 3 possible ways (maybe the most used ones) to convert an iterator to a list:
list(my_iterator)
[*my_iterator]
[e for e in my_iterator]
I have been using simple_bechmark library
from simple_benchmark import BenchmarkBuilder
from heapq import nsmallest
b = BenchmarkBuilder()
@b.add_function()
def convert_by_type_constructor(size):
list(iter(range(size)))
@b.add_function()
def convert_by_list_comprehension(size):
[e for e in iter(range(size))]
@b.add_function()
def convert_by_unpacking(size):
[*iter(range(size))]
@b.add_arguments('Convert an iterator to a list')
def argument_provider():
for exp in range(2, 22):
size = 2**exp
yield size, size
r = b.run()
r.plot()
As you can see there is very hard to make a difference between conversion by the constructor and conversion by unpacking, conversion by list comprehension is the “slowest” approach.
I have been testing also across different Python versions (3.6, 3.7, 3.8, 3.9) by using the following simple script:
import argparse
import timeit
parser = argparse.ArgumentParser(
description='Test convert iterator to list')
parser.add_argument(
'--size', help='The number of elements from iterator')
args = parser.parse_args()
size = int(args.size)
repeat_number = 10000
# do not wait too much if the size is too big
if size > 10000:
repeat_number = 100
def test_convert_by_type_constructor():
list(iter(range(size)))
def test_convert_by_list_comprehension():
[e for e in iter(range(size))]
def test_convert_by_unpacking():
[*iter(range(size))]
def get_avg_time_in_ms(func):
avg_time = timeit.timeit(func, number=repeat_number) * 1000 / repeat_number
return round(avg_time, 6)
funcs = [test_convert_by_type_constructor,
test_convert_by_unpacking, test_convert_by_list_comprehension]
print(*map(get_avg_time_in_ms, funcs))
The script will be executed via a subprocess from a Jupyter Notebook (or a script), the size parameter will be passed through command-line arguments and the script results will be taken from standard output.
from subprocess import PIPE, run
import pandas
simple_data = {'constructor': [], 'unpacking': [], 'comprehension': [],
'size': [], 'python version': []}
size_test = 100, 1000, 10_000, 100_000, 1_000_000
for version in ['3.6', '3.7', '3.8', '3.9']:
print('test for python', version)
for size in size_test:
command = [f'python{version}', 'perf_test_convert_iterator.py', f'--size={size}']
result = run(command, stdout=PIPE, stderr=PIPE, universal_newlines=True)
constructor, unpacking, comprehension = result.stdout.split()
simple_data['constructor'].append(float(constructor))
simple_data['unpacking'].append(float(unpacking))
simple_data['comprehension'].append(float(comprehension))
simple_data['python version'].append(version)
simple_data['size'].append(size)
df_ = pandas.DataFrame(simple_data)
df_
You can get my full notebook from here.
In most of the cases, in my tests, unpacking shows to be faster, but the difference is so small that the results may change from a run to the other. Again, the comprehension approach is the slowest, in fact, the other 2 methods are up to ~ 60% faster.
You can enable annotation processors in IntelliJ via the following:
There are two simple & elegant ways to do it.
Pure CSS:
After first form submission, despite the form validity, Angular will add a ng-submitted
class to all form elements inside the form just submitted.
We can use .ng-submitted
to controller our element via CSS.
if you want to display an error text only when user have submitted e.g.
.error { display: none }
.ng-submitted .error {
display: block;
}
Using a value from Scope:
After first form submission, despite the form validity, Angular will set [your form name].$submitted
to true. Thus, we can use that value to control elements.
<div ng-show="yourFormName.$submitted">error message</div>
<form name="yourFormName"></form>
This is a solution with no deprecated class or method : (Java 8 approved)
CloseableHttpClient httpClient = HttpClients.custom().setSSLHostnameVerifier(new NoopHostnameVerifier()).build();
HttpComponentsClientHttpRequestFactory requestFactory = new HttpComponentsClientHttpRequestFactory();
requestFactory.setHttpClient(httpClient);
RestTemplate restTemplate = new RestTemplate(requestFactory);
Important information : Using NoopHostnameVerifier is a security risk
In html
<input class="required form-control" id="d_start_date" name="d_start_date" type="text" value="">
In Js side
<script type="text/javascript">
$(document).ready(function () {
var dateToday = new Date();
dateToday.setDate(dateToday.getDate());
$('#d_start_date').datepicker({
autoclose: true,
startDate: dateToday
})
});
You can find the latest features of the .NET Framework 4.5 beta here
It breaks down the changes to the framework in the following categories:
You sound like you are more interested in the Web section as this shows the changes to ASP.NET 4.5. The rest of the changes can be found under the other headings.
You can also see some of the features that were new when the .NET Framework 4.0 was shipped here.
One example has always been brought up to me in the context of abstraction; the automatic vs. manual transmission on cars. The manual transmission hides some of the workings of changing gears, but you still have to clutch and shift as a driver. Automatic transmission encapsulates all the details of changing gears, i.e. hides it from you, and it is therefore a higher abstraction of the process of changing gears.
You can achieve the same using
<select [ngModel]="object">
<option *ngFor="let object of objects;let i= index;" [value]="object.value" selected="i==0">{{object.name}}</option>
</select>
First if the object you're dealing with is a string then you need to parse it then figure out the length of the keys :
obj = JSON.parse(jsonString);
shareInfoLen = Object.keys(obj.shareInfo[0]).length;
React components expose all the standard Javascript mouse events in their top-level interface. Of course, you can still use :hover
in your CSS, and that may be adequate for some of your needs, but for the more advanced behaviors triggered by a hover you'll need to use the Javascript. So to manage hover interactions, you'll want to use onMouseEnter
and onMouseLeave
. You then attach them to handlers in your component like so:
<ReactComponent
onMouseEnter={() => this.someHandler}
onMouseLeave={() => this.someOtherHandler}
/>
You'll then use some combination of state/props to pass changed state or properties down to your child React components.
Take a look at http://json.org/. It claims a bit different list of escaped characters than Chris proposed.
\"
\\
\/
\b
\f
\n
\r
\t
\u four-hex-digits
The selected answer does not work.
declare @str varchar(50)='79D136'
select 1 where @str NOT LIKE '%[^0-9]%'
I don't have a solution but know of this potential pitfall. The same goes if you substitute the letter 'D' for 'E' which is scientific notation.
With Bootstrap >4.1 it's just a case of using the flexbox utility classes. Just have a flexbox container inside your column, and then give all the elements within it the "flex-fill" class. As with inline forms you'll need to set the margins/padding on the elements yourself.
.prop-label {_x000D_
margin: .25rem 0 !important;_x000D_
}_x000D_
_x000D_
.prop-field {_x000D_
margin-left: 1rem;_x000D_
}
_x000D_
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" rel="stylesheet"/>_x000D_
<div class="row">_x000D_
<div class="col-12">_x000D_
<div class="d-flex">_x000D_
<label class="flex-fill prop-label">Label:</label>_x000D_
<input type="text" class="flex-fill form-control prop-field">_x000D_
</div>_x000D_
</div>_x000D_
</div>
_x000D_
If you are using Python 3 then this is for you and it really works.
print(value , sep='',end ='', file = sys.stdout , flush = False)
Select list of stored procedure in SQL server. Refer here for more: https://coderrooms.blogspot.com/2017/06/select-list-of-stored-procedure-in-sql.html
To know where your .sqlite file is stored in your AppDelegate.m add the following code
- (NSURL *)applicationDocumentsDirectory
{
NSLog(@"%@",[[[NSFileManager defaultManager] URLsForDirectory:NSDocumentDirectory inDomains:NSUserDomainMask] lastObject]);
return [[[NSFileManager defaultManager] URLsForDirectory:NSDocumentDirectory inDomains:NSUserDomainMask] lastObject];
}
now call this method in AppDelegate.m
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
//call here
[self applicationDocumentsDirectory];
}
I just noticed recently that when I used write()
on a socket in Windows, it almost works (the FD passed to write()
isn't the same as the one passed to send()
; I used _open_osfhandle()
to get the FD to pass to write()
). However, it didn't work when I tried to send binary data that included character 10. write()
somewhere inserted character 13 before this. Changing it to send()
with a flags parameter of 0 fixed that problem. read()
could have the reverse problem if 13-10 are consecutive in the binary data, but I haven't tested it. But that appears to be another possible difference between send()
and write()
.
Raises an exception and transfers execution to a CATCH block of a TRY…CATCH construct in SQL Server 2017.
Please refer the below link
@ImportanceOfBeingErnest 's answer is good if you only want to change the linewidth inside the legend box. But I think it is a bit more complex since you have to copy the handles before changing legend linewidth. Besides, it can not change the legend label fontsize. The following two methods can not only change the linewidth but also the legend label text font size in a more concise way.
import numpy as np
import matplotlib.pyplot as plt
# make some data
x = np.linspace(0, 2*np.pi)
y1 = np.sin(x)
y2 = np.cos(x)
# plot sin(x) and cos(x)
fig = plt.figure()
ax = fig.add_subplot(111)
ax.plot(x, y1, c='b', label='y1')
ax.plot(x, y2, c='r', label='y2')
leg = plt.legend()
# get the individual lines inside legend and set line width
for line in leg.get_lines():
line.set_linewidth(4)
# get label texts inside legend and set font size
for text in leg.get_texts():
text.set_fontsize('x-large')
plt.savefig('leg_example')
plt.show()
import numpy as np
import matplotlib.pyplot as plt
# make some data
x = np.linspace(0, 2*np.pi)
y1 = np.sin(x)
y2 = np.cos(x)
# plot sin(x) and cos(x)
fig = plt.figure()
ax = fig.add_subplot(111)
ax.plot(x, y1, c='b', label='y1')
ax.plot(x, y2, c='r', label='y2')
leg = plt.legend()
# get the lines and texts inside legend box
leg_lines = leg.get_lines()
leg_texts = leg.get_texts()
# bulk-set the properties of all lines and texts
plt.setp(leg_lines, linewidth=4)
plt.setp(leg_texts, fontsize='x-large')
plt.savefig('leg_example')
plt.show()
The above two methods produce the same output image:
This eventually helped me:
var x = 0;
var buttonText = 'LOADING';
$('#startbutton').click(function(){
$(this).text(buttonText);
window.setTimeout(addDotToButton,2000);
})
function addDotToButton(){
x++;
buttonText += '.';
$('#startbutton').text(buttonText);
if (x < 4) window.setTimeout(addDotToButton, 2000);
else location.reload(true);
}
Josh's comments are spot on. If you are not super familiar with critical values I'd suggest playing with qt, reading the manual (?qt
) in conjunction with looking at a look up table (LINK). When I first moved from SPSS to R I created a function that made critical t value look up pretty easy (I'd never use this now as it takes too much time and with the p values that are generally provided in the output it's a moot point). Here's the code for that:
critical.t <- function(){
cat("\n","\bEnter Alpha Level","\n")
alpha<-scan(n=1,what = double(0),quiet=T)
cat("\n","\b1 Tailed or 2 Tailed:\nEnter either 1 or 2","\n")
tt <- scan(n=1,what = double(0),quiet=T)
cat("\n","\bEnter Number of Observations","\n")
n <- scan(n=1,what = double(0),quiet=T)
cat("\n\nCritical Value =",qt(1-(alpha/tt), n-2), "\n")
}
critical.t()
flup's answer is the best but it did not work for me completely. I had to do the following as well to get it working:
export JAVA_HOME=/usr/lib/jvm/java-7-oracle/jre/
chmod 777
on the folder./gradlew build
- Building HibernateThe Form
has two properties called MinimizeBox
and MaximizeBox
, set both of them to false
.
To stop the form closing, handle the FormClosing
event, and set e.Cancel = true;
in there and after that, set WindowState = FormWindowState.Minimized;
, to minimize the form.
As mentioned in Takahiko Kawasaki's answer, java represents Unicode strings in the form of modified UTF-8 and in JVM-Spec CONSTANT_UTF8_info Structure, 2 bytes are allocated to length (and not the no. of characters of String).
To extend the answer, the ASM jvm bytecode library's putUTF8
method, contains this:
public ByteVector putUTF8(final String stringValue) {
int charLength = stringValue.length();
if (charLength > 65535) {
// If no. of characters> 65535, than however UTF-8 encoded length, wont fit in 2 bytes.
throw new IllegalArgumentException("UTF8 string too large");
}
for (int i = 0; i < charLength; ++i) {
char charValue = stringValue.charAt(i);
if (charValue >= '\u0001' && charValue <= '\u007F') {
// Unicode code-point encoding in utf-8 fits in 1 byte.
currentData[currentLength++] = (byte) charValue;
} else {
// doesnt fit in 1 byte.
length = currentLength;
return encodeUtf8(stringValue, i, 65535);
}
}
...
}
But when code-point mapping > 1byte, it calls encodeUTF8
method:
final ByteVector encodeUtf8(final String stringValue, final int offset, final int maxByteLength /*= 65535 */) {
int charLength = stringValue.length();
int byteLength = offset;
for (int i = offset; i < charLength; ++i) {
char charValue = stringValue.charAt(i);
if (charValue >= 0x0001 && charValue <= 0x007F) {
byteLength++;
} else if (charValue <= 0x07FF) {
byteLength += 2;
} else {
byteLength += 3;
}
}
...
}
In this sense, the max string length is 65535 bytes, i.e the utf-8 encoding length. and not char
count
You can find the modified-Unicode code-point range of JVM, from the above utf8 struct link.
I got it mostly working without a custom msbuild script. Here are the relevant TeamCity build configuration settings:
Artifact paths: %system.teamcity.build.workingDir%\MyProject\obj\Debug\Package\PackageTmp Type of runner: MSBuild (Runner for MSBuild files) Build file path: MyProject\MyProject.csproj Working directory: same as checkout directory MSBuild version: Microsoft .NET Framework 4.0 MSBuild ToolsVersion: 4.0 Run platform: x86 Targets: Package Command line parameters to MSBuild.exe: /p:Configuration=Debug
This will compile, package (with web.config transformation), and save the output as artifacts. The only thing missing is copying the output to a specified location, but that could be done either in another TeamCity build configuration with an artifact dependency or with an msbuild script.
Update
Here is an msbuild script that will compile, package (with web.config transformation), and copy the output to my staging server
<?xml version="1.0" encoding="utf-8" ?>
<Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
<PropertyGroup>
<Configuration Condition=" '$(Configuration)' == '' ">Release</Configuration>
<SolutionName>MySolution</SolutionName>
<SolutionFile>$(SolutionName).sln</SolutionFile>
<ProjectName>MyProject</ProjectName>
<ProjectFile>$(ProjectName)\$(ProjectName).csproj</ProjectFile>
</PropertyGroup>
<Target Name="Build" DependsOnTargets="BuildPackage;CopyOutput" />
<Target Name="BuildPackage">
<MSBuild Projects="$(SolutionFile)" ContinueOnError="false" Targets="Rebuild" Properties="Configuration=$(Configuration)" />
<MSBuild Projects="$(ProjectFile)" ContinueOnError="false" Targets="Package" Properties="Configuration=$(Configuration)" />
</Target>
<Target Name="CopyOutput">
<ItemGroup>
<PackagedFiles Include="$(ProjectName)\obj\$(Configuration)\Package\PackageTmp\**\*.*"/>
</ItemGroup>
<Copy SourceFiles="@(PackagedFiles)" DestinationFiles="@(PackagedFiles->'\\build02\wwwroot\$(ProjectName)\$(Configuration)\%(RecursiveDir)%(Filename)%(Extension)')"/>
</Target>
</Project>
You can also remove the SolutionName and ProjectName properties from the PropertyGroup tag and pass them to msbuild.
msbuild build.xml /p:Configuration=Deploy;SolutionName=MySolution;ProjectName=MyProject
Update 2
Since this question still gets a good deal of traffic, I thought it was worth updating my answer with my current script that uses Web Deploy (also known as MSDeploy).
<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003" DefaultTargets="Build" ToolsVersion="4.0">
<PropertyGroup>
<Configuration Condition=" '$(Configuration)' == '' ">Release</Configuration>
<ProjectFile Condition=" '$(ProjectFile)' == '' ">$(ProjectName)\$(ProjectName).csproj</ProjectFile>
<DeployServiceUrl Condition=" '$(DeployServiceUrl)' == '' ">http://staging-server/MSDeployAgentService</DeployServiceUrl>
</PropertyGroup>
<Target Name="VerifyProperties">
<!-- Verify that we have values for all required properties -->
<Error Condition=" '$(ProjectName)' == '' " Text="ProjectName is required." />
</Target>
<Target Name="Build" DependsOnTargets="VerifyProperties">
<!-- Deploy using windows authentication -->
<MSBuild Projects="$(ProjectFile)"
Properties="Configuration=$(Configuration);
MvcBuildViews=False;
DeployOnBuild=true;
DeployTarget=MSDeployPublish;
CreatePackageOnPublish=True;
AllowUntrustedCertificate=True;
MSDeployPublishMethod=RemoteAgent;
MsDeployServiceUrl=$(DeployServiceUrl);
SkipExtraFilesOnServer=True;
UserName=;
Password=;"
ContinueOnError="false" />
</Target>
</Project>
In TeamCity, I have parameters named env.Configuration
, env.ProjectName
and env.DeployServiceUrl
. The MSBuild runner has the build file path and the parameters are passed automagically (you don't have to specify them in Command line parameters).
You can also run it from the command line:
msbuild build.xml /p:Configuration=Staging;ProjectName=MyProject;DeployServiceUrl=http://staging-server/MSDeployAgentService
The following generic solution can be used with regular login, a Spring Social login, or most other Spring Security filters.
In your Spring MVC controller, when loading the product page, save the path to the product page in the session if user has not been logged in. In XML config, set the default target url. For example:
In your Spring MVC controller, the redirect method should read out the path from the session and return redirect:<my_saved_product_path>
.
So, after user logs in, they'll be sent to /redirect
page, which will promptly redirect them back to the product page that they last visited.
When you append to the div, hide it and show it with the argument "slow"
.
$("#img_container").append(first_div).hide().show('slow');
In addition to cletus' answer, JPA 2.0, final since december 2010, introduces an orphanRemoval
attribute on @OneToMany
annotations.
For more details see this blog entry.
Note that since the spec is relatively new, not all JPA 1 provider have a final JPA 2 implementation. For example, the Hibernate 3.5.0-Beta-2 release does not yet support this attribute.
n = str(input("Enter the number\n"))
list1 = []
for each_number in n:
list1.append(int(each_number))
print(sum(list1))
In addition to the above you can use the System.exit()
to return an exit code which may be very usuefull specially if your calling the process automatically using the System.exit(code);
this can help you determine for example if an error has occured during the run.
I know that there have already been some good answers, but I came across this question with a Google Search and I wish someone would have pointed out this online checking tool...
http://www.tormus.com/tools/div_checker
You just throw in a URL and it will show you the entire map of the page. Very useful for a quick debug like I needed.
The change in Manifest file did not change the App name,
<application android:icon="@drawable/ic__logo" android:theme="@style/AppTheme" android:largeHeap="true" android:label="@string/app_name">
but changing the Label
attribute in the MainLauncher
did the trick for me .
[Activity(Label = "@string/app_name", MainLauncher = true, Theme = "@style/MainActivityNoActionBarTheme", ScreenOrientation = ScreenOrientation.Portrait)]
On Ubunbtu.
Ben's message is close but it's not the root password that is the problem, the problem I found was I had created a password for the phpmyadmin database when I installed it. This password is not carried into the installation on ubuntu so the variable $dbpass=''; in the database settings file is empty and not the password you set.
Old question, but another answer to this question is to create a static function in a helper class that uses the CallerMemberNameAttribute.
public static string GetPropertyName([CallerMemberName] String propertyName = null) {
return propertyName;
}
And then use it like:
public string MyProperty {
get { Console.WriteLine("{0} was called", GetPropertyName()); return _myProperty; }
}
You may need to terminate SQL Server Reporting Services as well.
The query below will result in dd-mmm-yy format.
select
cast(DAY(getdate()) as varchar)+'-'+left(DATEname(m,getdate()),3)+'-'+
Right(Year(getdate()),2)
In Swift 4.1 and Xcode 9.4.1
Add UITableViewDataSource, UITableViewDelegate delegated to your class.
Create table view variable and array.
In viewDidLoad create table view.
Call table view delegates
Call table view delegate functions based on your requirement.
import UIKit
// 1
class yourViewController: UIViewController , UITableViewDataSource, UITableViewDelegate {
// 2
var yourTableView:UITableView = UITableView()
let myArray = ["row 1", "row 2", "row 3", "row 4"]
override func viewDidLoad() {
super.viewDidLoad()
// 3
yourTableView.frame = CGRect(x: 10, y: 10, width: view.frame.width-20, height: view.frame.height-200)
self.view.addSubview(yourTableView)
// 4
yourTableView.dataSource = self
yourTableView.delegate = self
}
// 5
// MARK - UITableView Delegates
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return myArray.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
var cell : UITableViewCell? = tableView.dequeueReusableCell(withIdentifier: "cell")
if cell == nil {
cell = UITableViewCell(style: UITableViewCellStyle.default, reuseIdentifier: "cell")
}
if self. myArray.count > 0 {
cell?.textLabel!.text = self. myArray[indexPath.row]
}
cell?.textLabel?.numberOfLines = 0
return cell!
}
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
return 50.0
}
If you are using storyboard, no need for Step 3.
But you need to create IBOutlet for your table view before Step 4.
According to Flexbugs:
In IE 10-11,
min-height
declarations on flex containers work to size the containers themselves, but their flex item children do not seem to know the size of their parents. They act as if no height has been set at all.
Here are a couple of workarounds:
<aside>
and <section>
:html {
height: 100%;
}
body {
display: flex;
flex-direction: column;
height: 100%;
margin: 0;
}
header,
footer {
background: #7092bf;
}
main {
flex: 1;
display: flex;
}
aside, section {
overflow: auto;
}
aside {
flex: 0 0 150px;
background: #3e48cc;
}
section {
flex: 1;
background: #9ad9ea;
}
_x000D_
<header>
<p>header</p>
</header>
<main>
<aside>
<p>aside</p>
</aside>
<section>
<p>content</p>
<p>content</p>
<p>content</p>
<p>content</p>
<p>content</p>
<p>content</p>
<p>content</p>
<p>content</p>
<p>content</p>
<p>content</p>
</section>
</main>
<footer>
<p>footer</p>
</footer>
_x000D_
html {
height: 100%;
}
body {
display: flex;
flex-direction: column;
height: 100%;
margin: 0;
}
header,
footer {
background: #7092bf;
}
main {
flex: 1 0 auto;
display: flex;
}
aside {
flex: 0 0 150px;
background: #3e48cc;
}
section {
flex: 1;
background: #9ad9ea;
}
_x000D_
<header>
<p>header</p>
</header>
<main>
<aside>
<p>aside</p>
</aside>
<section>
<p>content</p>
<p>content</p>
<p>content</p>
<p>content</p>
<p>content</p>
<p>content</p>
<p>content</p>
<p>content</p>
<p>content</p>
<p>content</p>
</section>
</main>
<footer>
<p>footer</p>
</footer>
_x000D_
You create the relationships the other way around; add foreign keys to the Person
type to create a Many-to-One relationship:
class Person(models.Model):
name = models.CharField(max_length=50)
birthday = models.DateField()
anniversary = models.ForeignKey(
Anniversary, on_delete=models.CASCADE)
address = models.ForeignKey(
Address, on_delete=models.CASCADE)
class Address(models.Model):
line1 = models.CharField(max_length=150)
line2 = models.CharField(max_length=150)
postalcode = models.CharField(max_length=10)
city = models.CharField(max_length=150)
country = models.CharField(max_length=150)
class Anniversary(models.Model):
date = models.DateField()
Any one person can only be connected to one address and one anniversary, but addresses and anniversaries can be referenced from multiple Person
entries.
Anniversary
and Address
objects will be given a reverse, backwards relationship too; by default it'll be called person_set
but you can configure a different name if you need to. See Following relationships "backward" in the queries documentation.
You can just read the data into a list and insert the new record where you want.
names = []
with open('names.txt', 'r+') as fd:
for line in fd:
names.append(line.split(' ')[-1].strip())
names.insert(2, "Charlie") # element 2 will be 3. in your list
fd.seek(0)
fd.truncate()
for i in xrange(len(names)):
fd.write("%d. %s\n" %(i + 1, names[i]))
Boost Test Library is a very good choice especially if you're already using Boost.
// TODO: Include your class to test here.
#define BOOST_TEST_MODULE MyTest
#include <boost/test/unit_test.hpp>
BOOST_AUTO_TEST_CASE(MyTestCase)
{
// To simplify this example test, let's suppose we'll test 'float'.
// Some test are stupid, but all should pass.
float x = 9.5f;
BOOST_CHECK(x != 0.0f);
BOOST_CHECK_EQUAL((int)x, 9);
BOOST_CHECK_CLOSE(x, 9.5f, 0.0001f); // Checks differ no more then 0.0001%
}
It supports:
PS: I wrote an article about it that may help you getting started: C++ Unit Testing Framework: A Boost Test Tutorial
<?php
// Get absolute path
$path = getcwd(); // /home/user/public_html/test/test.php.
$path = substr($path, 0, strpos($path, "public_html"));
$root = $path . "public_html/";
echo $root; // This will output /home/user/public_html/
Service Locator Pattern - ServiceLocatorFactoryBean keeps information of all the beans in the context. When client code asks for a service (bean) using name, it simply locates that bean in the context and returns it. Client code does not need to write spring related code to locate a bean.
I was struggling for hours on this until I figured out it can be done in one line of powershell:
invoke-webrequest -Uri "http://myserver/Reports/Pages/ReportViewer.aspx?%2fClients%2ftest&rs:Format=PDF&rs:ClearSession=true&CaseCode=12345678" -OutFile "C:\Temp\test.pdf" -UseDefaultCredentials
I looked into doing it purely in VBA but it runs to several pages, so I just call my powershell script from VBA every time I want to download a file.
Simple.
If you want to upload a folder or a file to Github
1- Create a repository on the Github
2- make: git remote add origin "Your Link" as it is described on the Github
3- Then use git push -u origin master.
4- You have to enter your username and Password.
5- After the authentication, the transfer will start
pip install --user -r requirements.txt
OR
pip3 install --user -r requirements.txt
The best way to use is white-space: nowrap;
This will align the text to one line.
Try with
f.mkdirs()
then createNewFile()
Why not just use the HR tag? It's made exactly for what you want. Kinda like trying to make a fork for eating soup when there's a spoon right in front of you on the table.
is working with both python2(e.g. Python 2.7.10) and python3(e.g. Python 3.6.4)
with open('in.txt') as f:
rows,cols=np.fromfile(f, dtype=int, count=2, sep=" ")
data = np.fromfile(f, dtype=int, count=cols*rows, sep=" ").reshape((rows,cols))
another way:
is working with both python2(e.g. Python 2.7.10) and python3(e.g. Python 3.6.4),
as well for complex matrices see the example below (only change int
to complex
)
with open('in.txt') as f:
data = []
cols,rows=list(map(int, f.readline().split()))
for i in range(0, rows):
data.append(list(map(int, f.readline().split()[:cols])))
print (data)
I updated the code, this method is working for any number of matrices and any kind of matrices(int
,complex
,float
) in the initial in.txt
file.
This program yields matrix multiplication as an application. Is working with python2, in order to work with python3 make the following changes
print to print()
and
print "%7g" %a[i,j], to print ("%7g" %a[i,j],end="")
the script:
import numpy as np
def printMatrix(a):
print ("Matrix["+("%d" %a.shape[0])+"]["+("%d" %a.shape[1])+"]")
rows = a.shape[0]
cols = a.shape[1]
for i in range(0,rows):
for j in range(0,cols):
print "%7g" %a[i,j],
print
print
def readMatrixFile(FileName):
rows,cols=np.fromfile(FileName, dtype=int, count=2, sep=" ")
a = np.fromfile(FileName, dtype=float, count=rows*cols, sep=" ").reshape((rows,cols))
return a
def readMatrixFileComplex(FileName):
data = []
rows,cols=list(map(int, FileName.readline().split()))
for i in range(0, rows):
data.append(list(map(complex, FileName.readline().split()[:cols])))
a = np.array(data)
return a
f = open('in.txt')
a=readMatrixFile(f)
printMatrix(a)
b=readMatrixFile(f)
printMatrix(b)
a1=readMatrixFile(f)
printMatrix(a1)
b1=readMatrixFile(f)
printMatrix(b1)
f.close()
print ("matrix multiplication")
c = np.dot(a,b)
printMatrix(c)
c1 = np.dot(a1,b1)
printMatrix(c1)
with open('complex_in.txt') as fid:
a2=readMatrixFileComplex(fid)
print(a2)
b2=readMatrixFileComplex(fid)
print(b2)
print ("complex matrix multiplication")
c2 = np.dot(a2,b2)
print(c2)
print ("real part of complex matrix")
printMatrix(c2.real)
print ("imaginary part of complex matrix")
printMatrix(c2.imag)
as input file I take in.txt
:
4 4
1 1 1 1
2 4 8 16
3 9 27 81
4 16 64 256
4 3
4.02 -3.0 4.0
-13.0 19.0 -7.0
3.0 -2.0 7.0
-1.0 1.0 -1.0
3 4
1 2 -2 0
-3 4 7 2
6 0 3 1
4 2
-1 3
0 9
1 -11
4 -5
and complex_in.txt
3 4
1+1j 2+2j -2-2j 0+0j
-3-3j 4+4j 7+7j 2+2j
6+6j 0+0j 3+3j 1+1j
4 2
-1-1j 3+3j
0+0j 9+9j
1+1j -11-11j
4+4j -5-5j
and the output look like:
Matrix[4][4]
1 1 1 1
2 4 8 16
3 9 27 81
4 16 64 256
Matrix[4][3]
4.02 -3 4
-13 19 -7
3 -2 7
-1 1 -1
Matrix[3][4]
1 2 -2 0
-3 4 7 2
6 0 3 1
Matrix[4][2]
-1 3
0 9
1 -11
4 -5
matrix multiplication
Matrix[4][3]
-6.98 15 3
-35.96 70 20
-104.94 189 57
-255.92 420 96
Matrix[3][2]
-3 43
18 -60
1 -20
[[ 1.+1.j 2.+2.j -2.-2.j 0.+0.j]
[-3.-3.j 4.+4.j 7.+7.j 2.+2.j]
[ 6.+6.j 0.+0.j 3.+3.j 1.+1.j]]
[[ -1. -1.j 3. +3.j]
[ 0. +0.j 9. +9.j]
[ 1. +1.j -11.-11.j]
[ 4. +4.j -5. -5.j]]
complex matrix multiplication
[[ 0. -6.j 0. +86.j]
[ 0. +36.j 0.-120.j]
[ 0. +2.j 0. -40.j]]
real part of complex matrix
Matrix[3][2]
0 0
0 0
0 0
imaginary part of complex matrix
Matrix[3][2]
-6 86
36 -120
2 -40
A simple intuitive implementation:
public static List<PointF> RemoveDuplicates(List<PointF> listPoints)
{
List<PointF> result = new List<PointF>();
for (int i = 0; i < listPoints.Count; i++)
{
if (!result.Contains(listPoints[i]))
result.Add(listPoints[i]);
}
return result;
}
This thread is old but I wanted to do same things with the https://github.com/mikeal/request package.
Here a working example
var fs = require('fs');
var request = require('request');
// Or with cookies
// var request = require('request').defaults({jar: true});
request.get({url: 'https://someurl/somefile.torrent', encoding: 'binary'}, function (err, response, body) {
fs.writeFile("/tmp/test.torrent", body, 'binary', function(err) {
if(err)
console.log(err);
else
console.log("The file was saved!");
});
});
I had enough success just catchig socket.timeout
and socket.error
; although socket.error can be raised for lots of reasons. Be careful.
import socket
import logging
hostname='google.com'
port=443
try:
sock = socket.create_connection((hostname, port), timeout=3)
except socket.timeout as err:
logging.error(err)
except socket.error as err:
logging.error(err)
Maybe something like this:
import matplotlib.pyplot
import pylab
x = [1,2,3,4]
y = [3,4,8,6]
matplotlib.pyplot.scatter(x,y)
matplotlib.pyplot.show()
EDIT:
Let me see if I understand you correctly now:
You have:
test1 | test2 | test3
test3 | 1 | 0 | 1
test4 | 0 | 1 | 0
test5 | 1 | 1 | 0
Now you want to represent the above values in in a scatter plot, such that value of 1 is represented by a dot.
Let's say you results are stored in a 2-D list:
results = [[1, 0, 1], [0, 1, 0], [1, 1, 0]]
We want to transform them into two variables so we are able to plot them.
And I believe this code will give you what you are looking for:
import matplotlib
import pylab
results = [[1, 0, 1], [0, 1, 0], [1, 1, 0]]
x = []
y = []
for ind_1, sublist in enumerate(results):
for ind_2, ele in enumerate(sublist):
if ele == 1:
x.append(ind_1)
y.append(ind_2)
matplotlib.pyplot.scatter(x,y)
matplotlib.pyplot.show()
Notice that I do need to import pylab
, and you would have play around with the axis labels. Also this feels like a work around, and there might be (probably is) a direct method to do this.
Had the same problem, while differently from other answers in my case I use ASP.NET to develop the WebAPI server.
I already had Corps allowed and it worked for GET requests. To make POST requests work I needed to add 'AllowAnyHeader()' and 'AllowAnyMethod()' options to the list of Corp options.
Here are essential parts of related functions in Start class look like:
ConfigureServices method:
services.AddCors(options =>
{
options.AddPolicy(name: MyAllowSpecificOrigins,
builder =>
{
builder
.WithOrigins("http://localhost:4200")
.AllowAnyHeader()
.AllowAnyMethod()
//.AllowCredentials()
;
});
});
Configure method:
app.UseCors(MyAllowSpecificOrigins);
Found this from:
As amaud576875 said, the \r
escape sequence signifies a carriage-return, similar to pressing the Enter key. However, I'm not sure how you get "o world"; you should (and I do) get "my first hello world" and then a new line. Depending on what operating system you're using (I'm using Mac) you might want to use a \n
instead of a \r
.
Element.prototype.getA = function (a) {
if (a) {
return this.getAttribute(a);
} else {
var o = {};
for(let a of this.attributes){
o[a.name]=a.value;
}
return o;
}
}
having <div id="mydiv" a='1' b='2'>...</div>
can use
mydiv.getA() // {id:"mydiv",a:'1',b:'2'}
your class should be public
public class FBlock : IDesignRegionInserts, IFormRegionInserts, IAPIRegionInserts, IConfigurationInserts, ISoapProxyClientInserts, ISoapProxyServiceInserts
If you want to pass parameters like user names, product names, ... etc. you can use open source template engine NVelocity to produce your final email / HTML's.
An example of NVelocity template (MailTemplate.vm) :
A sample email template by <b>$name</b>.
<br />
Foreach example :
<br />
#foreach ($item in $itemList)
[Date: $item.Date] Name: $item.Name, Value: $itemValue.Value
<br /><br />
#end
Generating mail body by MailTemplate.vm in your application :
VelocityContext context = new VelocityContext();
context.Put("name", "ScarletGarden");
context.Put("itemList", itemList);
StringWriter writer = new StringWriter();
Velocity.MergeTemplate("MailTemplate.vm", context, writer);
string mailBody = writer.GetStringBuilder().ToString();
The result mail body is :
A sample email template by ScarletGarden.
Foreach example :
[Date: 12.02.2009] Name: Item 1, Value: 09
[Date: 21.02.2009] Name: Item 4, Value: 52
[Date: 01.03.2009] Name: Item 2, Value: 21
[Date: 23.03.2009] Name: Item 6, Value: 24
For editing the templates, maybe you can use FCKEditor and save your templates to files.
str.split()
without any arguments splits on runs of whitespace characters:
>>> s = 'I am having a very nice day.'
>>>
>>> len(s.split())
7
From the linked documentation:
If sep is not specified or is
None
, a different splitting algorithm is applied: runs of consecutive whitespace are regarded as a single separator, and the result will contain no empty strings at the start or end if the string has leading or trailing whitespace.
A BufferedReader constructor takes a reader as argument, not an InputStream. You should first create a Reader from your stream, like so:
Reader reader = new InputStreamReader(is);
BufferedReader br = new BufferedReader(reader);
Preferrably, you also provide a Charset or character encoding name to the StreamReader constructor. Since a stream just provides bytes, converting these to text means the encoding must be known. If you don't specify it, the system default is assumed.
I'm using tesseract OCR engine with TessNet2 (a C# wrapper - http://www.pixel-technology.com/freeware/tessnet2/).
Some basic code:
using tessnet2;
...
Bitmap image = new Bitmap(@"u:\user files\bwalker\2849257.tif");
tessnet2.Tesseract ocr = new tessnet2.Tesseract();
ocr.SetVariable("tessedit_char_whitelist", "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz.,$-/#&=()\"':?"); // Accepted characters
ocr.Init(@"C:\Users\bwalker\Documents\Visual Studio 2010\Projects\tessnetWinForms\tessnetWinForms\bin\Release\", "eng", false); // Directory of your tessdata folder
List<tessnet2.Word> result = ocr.DoOCR(image, System.Drawing.Rectangle.Empty);
string Results = "";
foreach (tessnet2.Word word in result)
{
Results += word.Confidence + ", " + word.Text + ", " + word.Left + ", " + word.Top + ", " + word.Bottom + ", " + word.Right + "\n";
}
None of the answer works for me on Wordpress website but following works ( it's similar to other answers but have a little change)
RewriteEngine On
RewriteCond %{HTTPS} on
RewriteRule (.*) http://%{HTTP_HOST}%{REQUEST_URI} [R=301,L]
This question is very helpfully BUT Don't forget to mount SD Card in your emulator, if you don't do this its doesn't work.
I lose my time before discover this.
bufferedWriter.write(text + "\n");
This method can work, but the new line character can be different between platforms, so alternatively, you can use this method:
bufferedWriter.write(text);
bufferedWriter.newline();
Since you've got both the shell that you're typing into and the shell that sudo -s
runs, you need to quote or escape twice. (EDITED fixed quoting)
sudo -su db2inst1 '/opt/ibm/db2/V9.7/bin/db2 force application \(1995\)'
or
sudo -su db2inst1 /opt/ibm/db2/V9.7/bin/db2 force application \\\(1995\\\)
Out of curiosity, why do you need -s? Can't you just do this:
sudo -u db2inst1 /opt/ibm/db2/V9.7/bin/db2 force application \(1995\)
If you don't reference the imageBytes to carry bytes in the stream, the method won't return anything. Make sure you reference imageBytes = m.ToArray();
public static byte[] SerializeImage() {
MemoryStream m;
string PicPath = pathToImage";
byte[] imageBytes;
using (Image image = Image.FromFile(PicPath)) {
using ( m = new MemoryStream()) {
image.Save(m, image.RawFormat);
imageBytes = new byte[m.Length];
//Very Important
imageBytes = m.ToArray();
}//end using
}//end using
return imageBytes;
}//SerializeImage
No. The only officially supported tool for downloading and updating Cygwin packages is the setup.exe file you used for the initial install, although that can be invoked with command line arguments to help the process.
From that same page:
The basic reason for not having a more full-featured package manager is that such a program would need full access to all of Cygwin's POSIX functionality. That is, however, difficult to provide in a Cygwin-free environment, such as exists on first installation. Additionally, Windows does not easily allow overwriting of in-use executables so installing a new version of the Cygwin DLL while a package manager is using the DLL is problematic.
for line in f
reads all file to a memory, and that can be a problem.
My offer is to change the original source by replacing stripping and checking for empty line. Because if it is not last line - You will receive at least newline character in it ('\n'). And '.strip()' removes it. But in last line of a file You will receive truely empty line, without any characters. So the following loop will not give You false EOF, and You do not waste a memory:
with open("blablabla.txt", "r") as fl_in:
while True:
line = fl_in.readline()
if not line:
break
line = line.strip()
# do what You want
Additionally, if you want to be able to run your python scripts without typing the .py
(or .pyw
) on the end of the file name, you need to add .PY
(or .PY;.PYW
) to the list of extensions in the PATHEXT environment variable.
In Windows 7:
right-click on Computer
left-click Properties
left-click Advanced system settings
left-click the Advanced tab
left-click Environment Variables...
under "system variables" scroll down until you see PATHEXT
left-click on PATHEXT to highlight it
left-click Edit...
Edit "Variable value" so that it contains ;.PY
(the End key will skip to the end)
left-click OK
left-click OK
left-click OK
Note #1: command-prompt windows won't see the change w/o being closed and reopened.
Note #2: the difference between the .py
and .pyw
extensions is that the former opens a command prompt when run, and the latter doesn't.
On my computer, I added ;.PY;.PYW
as the last (lowest-priority) extensions, so the "before" and "after" values of PATHEXT were:
before: .COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC
after .COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC;.PY;.PYW
Here are some instructive commands:
C:\>echo %pathext%
.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC;.PY;.PYW
C:\>assoc .py
.py=Python.File
C:\>ftype Python.File
Python.File="C:\Python32\python.exe" "%1" %*
C:\>assoc .pyw
.pyw=Python.NoConFile
C:\>ftype Python.NoConFile
Python.NoConFile="C:\Python32\pythonw.exe" "%1" %*
C:\>type c:\windows\helloworld.py
print("Hello, world!") # always use a comma for direct address
C:\>helloworld
Hello, world!
C:\>
try this command, xcopy c:\ (file or directory path) F:\ /e. If you want more details refer this site [[http://www.computerhope.com/xcopyhlp.htm]]
I've wrapped Darin's answer into a nicely reusable extension method.
public static class UriExtensions
{
/// <summary>
/// Adds the specified parameter to the Query String.
/// </summary>
/// <param name="url"></param>
/// <param name="paramName">Name of the parameter to add.</param>
/// <param name="paramValue">Value for the parameter to add.</param>
/// <returns>Url with added parameter.</returns>
public static Uri AddParameter(this Uri url, string paramName, string paramValue)
{
var uriBuilder = new UriBuilder(url);
var query = HttpUtility.ParseQueryString(uriBuilder.Query);
query[paramName] = paramValue;
uriBuilder.Query = query.ToString();
return uriBuilder.Uri;
}
}
I hope this helps!
This code nearly worked for me...but I wanted a multiple element filter so my mods to the filter pipe are below:
import { Pipe, PipeTransform, Injectable } from '@angular/core';
@Pipe({ name: 'jsonFilterBy' })
@Injectable()
export class JsonFilterByPipe implements PipeTransform {
transform(json: any[], args: any[]): any[] {
const searchText = args[0];
const jsonKey = args[1];
let jsonKeyArray = [];
if (searchText == null || searchText === 'undefined') { return json; }
if (jsonKey.indexOf(',') > 0) {
jsonKey.split(',').forEach( function(key) {
jsonKeyArray.push(key.trim());
});
} else {
jsonKeyArray.push(jsonKey.trim());
}
if (jsonKeyArray.length === 0) { return json; }
// Start with new Array and push found objects onto it.
let returnObjects = [];
json.forEach( function ( filterObjectEntry ) {
jsonKeyArray.forEach( function (jsonKeyValue) {
if ( typeof filterObjectEntry[jsonKeyValue] !== 'undefined' &&
filterObjectEntry[jsonKeyValue].toLowerCase().indexOf(searchText.toLowerCase()) > -1 ) {
// object value contains the user provided text.
returnObjects.push(filterObjectEntry);
}
});
});
return returnObjects;
}
}
Now, instead of
jsonFilterBy:[ searchText, 'name']
you can do
jsonFilterBy:[ searchText, 'name, other, other2...']
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).
mariadb uses by defaults UNIX_SOCKET plugin to authenticate user root. https://mariadb.com/kb/en/mariadb/unix_socket-authentication-plugin/
"Because he has identified himself to the operating system, he does not need to do it again for the database"
so you need to login as the root user on unix to login as root in mysql/mariadb:
sudo mysql
if you want to login with root from your normal unix user, you can disable the authentication plugin for root.
Beforehand you can set the root password with mysql_secure_installation (default password is blank), then to let every user authenticate as root login with:
shell$ sudo mysql -u root
[mysql] use mysql;
[mysql] update user set plugin='' where User='root';
[mysql] flush privileges;
[mysql] \q
I got the same error, the solution was to put the attribute
target = "_ blank"
Finally :
<a href="/uploads/file.*" target="_blank">Download</a>
Where *
is the extension of your file to download.
same thing happened to me, but all that was happening is that the private key got lost from the keychain on my local machine.
ssh-add -K
re-added the key, then the ssh command to connect returned to work.
You could always use something like this:
string(//Sesscode) castable as xs:decimal
castable is documented by W3C here.
data = pd.DataFrame({"a":[1,2,3,34],"b":[5,6,7,8]})
new_data = pd.melt(data)
new_data.set_index("variable", inplace=True)
This gives a dataframe with index as column name of data and all data are present in "values" column
This would be correct:
SELECT * FROM table WHERE field regexp concat_ws("|",(
"111",
"222",
"333"
));