A good way of reducing the number of collision checks is to split the screen into different sections. You then only compare each ball to the balls in the same section.
Usually for jumping people use Rigidbody2D.AddForce
with Forcemode.Impulse
. It may seem like your object is pushed once in Y axis and it will fall down automatically due to gravity.
Example:
rigidbody2D.AddForce(new Vector2(0, 10), ForceMode2D.Impulse);
Try adding -Xmx for more memory ( java -Xmx1024M YourClass
), and don't forget to stop referencing variables you don't need any more (memory leaks).
The answer is NO you can't. Why?
Because the LDAP standard describes a LDAP-SEARCH as kind of function with 4 parameters:
You are interested in the filter. You've got a summary here (it's provided by Microsoft for Active Directory, it's from a standard). The filter is composed, in a boolean way, by expression of the type Attribute Operator Value
.
So the filter you give does not mean anything.
On the theoretical point of view there is ExtensibleMatch that allows buildind filters on the DN path, but it's not supported by Active Directory.
As far as I know, you have to use an attribute in AD to make the distinction for users in the two OUs.
It can be any existing discriminator attribute, or, for example the attribute called OU which is inherited from organizationalPerson
class. you can set it (it's not automatic, and will not be maintained if you move the users) with "staff" for some users and "vendors" for others and them use the filter:
(&(objectCategory=person)(|(ou=staff)(ou=vendors)))
nohup
catches the hangup signal (see man 7 signal
) while the ampersand doesn't (except the shell is confgured that way or doesn't send SIGHUP
at all).
Normally, when running a command using &
and exiting the shell afterwards, the shell will terminate the sub-command with the hangup signal (kill -SIGHUP <pid>
). This can be prevented using nohup
, as it catches the signal and ignores it so that it never reaches the actual application.
In case you're using bash, you can use the command shopt | grep hupon
to find out whether
your shell sends SIGHUP to its child processes or not. If it is off, processes won't be
terminated, as it seems to be the case for you. More information on how bash terminates
applications can be found here.
There are cases where nohup
does not work, for example when the process you start reconnects
the SIGHUP
signal, as it is the case here.
You can use normal CSS selectors to select an element by name using jquery. Like this:
Button Code
<button type="button" name="mybutton">Click Me!</button>
Selector & Event Bind Code
$("button[name='mybutton']").click(function() {});
static variables are specific to a class . Constructors initialize attributes ESPECIALY for an instance.
Logging has different levels such as :
Trace – A fine-grained debug message, typically capturing the flow through the application.
Debug- A general debugging event should be logged under this.
ALL – All events could be logged.
INFO- An informational purpose, information written in plain english.
Warn- An event that might possible lead to an error.
Error- An error in the application, possibly recoverable.
Logging captured with debug level is information helpful to developers as well as other personnel, so it captures in broad range. If your code doesn't have exception or errors then you should be alright to use DEBUG level of logging, otherwise you should carefully choose options.
The important needs to be inside the ;
td.rule2 div { background-color: #ffff00 !important; }
in fact i believe this should override it
td.rule2 { background-color: #ffff00 !important; }
How about
Select I.Fee
From Item I
WHERE (days(GETDATE()) - days(I.DateCreated) < 365)
Always remember, when comparing strings, you should use ===
operator (strict comparison) and not ==
operator (loose comparison).
Background images, ideally, are always done with CSS. All other images are done with html. This will span the whole background of your site.
body {
background: url('../images/cat.ong');
background-size: cover;
background-position: center;
background-attachment: fixed;
}
I was facing the same error, I was trying to install jest into to one of the packages in a monorepo project.
If you are using Yarn + Learna to package a monorepo project, you will have to navigate to the package.json inside the target package and then run npm install
or npm install <package name>
.
#include <stdio.h>
#include <time.h>
int main ()
{
time_t rawtime;
struct tm * timeinfo;
time ( &rawtime );
timeinfo = localtime ( &rawtime );
printf ( "Current local time and date: %s", asctime (timeinfo) );
return 0;
}
This guy had the magic wand we were looking for, guys.
To quote his answer:
just add "position:fixed" and it will keep it in view even if you scroll down. see it at http://jsfiddle.net/XEUbc/1/
#mydiv {
position:fixed;
top: 50%;
left: 50%;
width:30em;
height:18em;
margin-top: -9em; /*set to a negative number 1/2 of your height*/
margin-left: -15em; /*set to a negative number 1/2 of your width*/
border: 1px solid #ccc;
background-color: #f3f3f3;
}
public class TabBrowserDemo {
public static void main(String[] args) throws InterruptedException {
System.out.println("Main Started");
System.setProperty("webdriver.gecko.driver", "driver//geckodriver.exe");
WebDriver driver = new FirefoxDriver();
driver.get("https://www.irctc.co.in/eticketing/userSignUp.jsf");
driver.manage().timeouts().implicitlyWait(30, TimeUnit.SECONDS);
driver.findElement(By.xpath("//a[text()='Flights']")).click();
waitForLoad(driver);
Set<String> ids = driver.getWindowHandles();
Iterator<String> iterator = ids.iterator();
String parentID = iterator.next();
System.out.println("Parent WIn id " + parentID);
String childID = iterator.next();
System.out.println("child win id " + childID);
driver.switchTo().window(childID);
List<WebElement> hyperlinks = driver.findElements(By.xpath("//a"));
System.out.println("Total links in tabbed browser " + hyperlinks.size());
Thread.sleep(3000);
// driver.close();
driver.switchTo().window(parentID);
List<WebElement> hyperlinksOfParent = driver.findElements(By.xpath("//a"));
System.out.println("Total links " + hyperlinksOfParent.size());
}
public static void waitForLoad(WebDriver driver) {
ExpectedCondition<Boolean> pageLoadCondition = new
ExpectedCondition<Boolean>() {
public Boolean apply(WebDriver driver) {
return ((JavascriptExecutor)driver).executeScript("return document.readyState").equals("complete");
}
};
WebDriverWait wait = new WebDriverWait(driver, 30);
wait.until(pageLoadCondition);
}
Try to make Treemap < Integer, Treemap<Integer, obj> >
In java, Treemap is sorted map. And the number of item in row and col wont screw the 2D-index you want to set. Then you can get a col-row table like structure.
Expression: "Total Count: " + (DT_WSTR, 5)@[User::Cnt]
typedef
is useful for redefining the name of an existing variable type. It provides short & meaningful way to call a datatype.
e.g:
typedef unsigned long int TWOWORDS;
here, the type unsigned long int is redefined to be of the type TWOWORDS. Thus, we can now declare variables of type unsigned long int by writing,
TWOWORDS var1, var2;
instead of
unsigned long int var1, var2;
Spring is a collection of best-practise API patterns, you can write up a shopping list of them as long as your arm. The way that the API is designed encourages you (but doesn't force you) to follow these patterns, and half the time you follow them without knowing you are doing so.
Sometimes the problem may be if you import
that like this:
const Vue = window.vue;
this may overwrite the original Vue
reference.
To insert a single row of data:
INSERT INTO USERS
VALUES (1, 'Mike', 'Jones');
To do an insert on specific columns (as opposed to all of them) you must specify the columns you want to update.
INSERT INTO USERS (FIRST_NAME, LAST_NAME)
VALUES ('Stephen', 'Jiang');
To insert multiple rows of data in SQL Server 2008 or later:
INSERT INTO USERS VALUES
(2, 'Michael', 'Blythe'),
(3, 'Linda', 'Mitchell'),
(4, 'Jillian', 'Carson'),
(5, 'Garrett', 'Vargas');
To insert multiple rows of data in earlier versions of SQL Server, use "UNION ALL" like so:
INSERT INTO USERS (FIRST_NAME, LAST_NAME)
SELECT 'James', 'Bond' UNION ALL
SELECT 'Miss', 'Moneypenny' UNION ALL
SELECT 'Raoul', 'Silva'
Note, the "INTO" keyword is optional in INSERT queries. Source and more advanced querying can be found here.
I agree with Ken's answer as being the most dynamic and I like to take it a step further. If it's a function that you call multiple times with different arguments - I use Ken's design but then add default values:
function load(context) {
var defaults = {
parameter1: defaultValue1,
parameter2: defaultValue2,
...
};
var context = extend(defaults, context);
// do stuff
}
This way, if you have many parameters but don't necessarily need to set them with each call to the function, you can simply specify the non-defaults. For the extend method, you can use jQuery's extend method ($.extend()
), craft your own or use the following:
function extend() {
for (var i = 1; i < arguments.length; i++)
for (var key in arguments[i])
if (arguments[i].hasOwnProperty(key))
arguments[0][key] = arguments[i][key];
return arguments[0];
}
This will merge the context object with the defaults and fill in any undefined values in your object with the defaults.
after your pc connects to other pc use these 4 step:
4 steps:
1- Edit this file: httpd.conf
for that click on wamp server and select Apache and select httpd.conf
2- Find this text: Deny from all
in the below tag:
<Directory "c:/wamp/www"><!-- maybe other url-->
#
# Possible values for the Options directive are "None", "All",
# or any combination of:
# Indexes Includes FollowSymLinks SymLinksifOwnerMatch ExecCGI MultiViews
#
# Note that "MultiViews" must be named *explicitly* --- "Options All"
# doesn't give it to you.
#
# The Options directive is both complicated and important. Please see
# http://httpd.apache.org/docs/2.4/mod/core.html#options
# for more information.
#
Options Indexes FollowSymLinks
#
# AllowOverride controls what directives may be placed in .htaccess files.
# It can be "All", "None", or any combination of the keywords:
# AllowOverride FileInfo AuthConfig Limit
#
AllowOverride All
#
# Controls who can get stuff from this server.
#
# Require all granted
# onlineoffline tag - don't remove
Order Deny,Allow
Deny from all
Allow from 127.0.0.1
Allow from ::1
Allow from localhost
</Directory>
3- Change to: Deny from none
like this:
<Directory "c:/wamp/www">
#
# Possible values for the Options directive are "None", "All",
# or any combination of:
# Indexes Includes FollowSymLinks SymLinksifOwnerMatch ExecCGI MultiViews
#
# Note that "MultiViews" must be named *explicitly* --- "Options All"
# doesn't give it to you.
#
# The Options directive is both complicated and important. Please see
# http://httpd.apache.org/docs/2.4/mod/core.html#options
# for more information.
#
Options Indexes FollowSymLinks
#
# AllowOverride controls what directives may be placed in .htaccess files.
# It can be "All", "None", or any combination of the keywords:
# AllowOverride FileInfo AuthConfig Limit
#
AllowOverride All
#
# Controls who can get stuff from this server.
#
# Require all granted
# onlineoffline tag - don't remove
Order Deny,Allow
Deny from none
Allow from 127.0.0.1
Allow from ::1
Allow from localhost
4- Restart Apache
Don't forget restart Apache or all servises!!!
Missing implementation of a function in class
The reason I faced this issue was because I had deleted the function's implementation from the cpp file, but forgotten to delete the declaration from the .h file.
My answer doesn't specifically answer your question, but lets people who come to this thread looking for answer know that this can also one cause.
I recently had this issue and I ran 'depends.exe' on the dll in question. It showed me that the dll was compiled in x86 while some of the dependencys were compiled in x64.
If you are still having troubles I would recommend using depends.exe.
What finally fixed it for me on Ubuntu 18.04 was:
sudo apt install qemu-kvm
sudo adduser $USER kvm
sudo chown $USER /dev/kvm
From the Android documentation:
The recommended way to develop an Android application is to use Eclipse with the ADT plugin... However, if you'd rather develop your application in another IDE, such as IntelliJ, or in a basic editor, such as Emacs, you can do that instead.
Currently, there are plug-ins for IntelliJ IDEA and NetBeans, but you can still use the tools in /tools to build, debug, monitor, measure and start the emulator.
I believe this to be one of the better extension for Visual Studio 2012, it's called Code Compare and can be found here.
Under the general heading of 'editors always forget to document getting out…' to toggle go to another line and press the combination ctrl+shift+'N' to erase the current bookmark do the same on marked line…
there is a way to do this. you have to create a Bitmap and a Canvas and call view.draw(canvas);
here is the code:
public static Bitmap loadBitmapFromView(View v) {
Bitmap b = Bitmap.createBitmap( v.getLayoutParams().width, v.getLayoutParams().height, Bitmap.Config.ARGB_8888);
Canvas c = new Canvas(b);
v.layout(v.getLeft(), v.getTop(), v.getRight(), v.getBottom());
v.draw(c);
return b;
}
if the view wasn't displayed before the size of it will be zero. Its possible to measure it like this:
if (v.getMeasuredHeight() <= 0) {
v.measure(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
Bitmap b = Bitmap.createBitmap(v.getMeasuredWidth(), v.getMeasuredHeight(), Bitmap.Config.ARGB_8888);
Canvas c = new Canvas(b);
v.layout(0, 0, v.getMeasuredWidth(), v.getMeasuredHeight());
v.draw(c);
return b;
}
EDIT: according to this post, Passing WRAP_CONTENT
as value to makeMeasureSpec()
doesn't to do any good (although for some view classes it does work), and the recommended method is:
// Either this
int specWidth = MeasureSpec.makeMeasureSpec(parentWidth, MeasureSpec.AT_MOST);
// Or this
int specWidth = MeasureSpec.makeMeasureSpec(0 /* any */, MeasureSpec.UNSPECIFIED);
view.measure(specWidth, specWidth);
int questionWidth = view.getMeasuredWidth();
console.log
takes multiple arguments, so just use:
console.log("story", name, "story");
If name is an object
or an array
then using multiple arguments is better than concatenation. If you concatenate an object
or array
into a string you simply log the type rather than the content of the variable.
But if name is just a primitive type then multiple arguments works the same as concatenation.
One of The Shortest method i found for single value while i was searching for myself, is just passing single string and setting string as model in view like this.
In your Partial calling side
@Html.Partial("ParitalAction", "String data to pass to partial")
And then binding the model with Partial View like this
@model string
and the using its value in Partial View like this
@Model
You can also play with other datatypes like array, int or more complex data types like IDictionary or something else.
Hope it helps,
the size attribute matters, if the size=5 then first 5 items will be shown and for others you need to scroll down..
<select name="numbers" size="5">
<option>1</option>
<option>2</option>
<option>3</option>
<option>4</option>
<option>5</option>
<option>6</option>
<option>7</option>
</select>
The pointer-events
could be useful for this problem as you would be able to put a div over the arrow button, but still be able to click the arrow button.
The pointer-events
css makes it possible to click through a div.
This approach will not work for IE versions older than IE11, however. You could something working in IE8 and IE9 if the element you put on top of the arrow button is an SVG
element, but it will be more complicated to style the button the way you want proceeding like this.
Here a Js fiddle example: http://jsfiddle.net/e7qnqzx6/2/
I will provide a detailed differences between Visual Studio and Visual Studio Code below.
If you really look at it the most obvious difference is that .NET has been split into two:
All native user interface technologies (Windows Presentation Foundation, Windows Forms, etc.) are part of the framework, not the core.
The "Visual" in Visual Studio (from Visual Basic) was largely synonymous with visual UI (drag & drop WYSIWYG) design, so in that sense, Visual Studio Code is Visual Studio without the Visual!
The second most obvious difference is that Visual Studio tends to be oriented around projects & solutions.
Visual Studio Code:
Visual Studio:
Visual Studio is aimed to be the world’s best IDE (integrated development environment), which provide full stack develop toolsets, including a powerful code completion component called IntelliSense, a debugger which can debug both source code and machine code, everything about ASP.NET development, and something about SQL development.
In the latest version of Visual Studio, you can develop cross-platform application without leaving the IDE. And Visual Studio takes more than 8 GB disk space (according to the components you select).
In brief, Visual Studio is an ultimate development environment, and it’s quite heavy.
Reference: https://www.quora.com/What-is-the-difference-between-Visual-Studio-and-Visual-Studio-Code
(along CUDA Toolkit 11.0 RC)
To solve the same issue as OP, I just had to find cudart64_101.dll on my disk (in my case C:\Program Files\NVIDIA Corporation\NvStreamSrv) and add it as variable environment (that is add value C:\Program Files\NVIDIA\Corporation\NvStreamSrv)cudart64_101.dll to user's environment variable Path).
change the code to the following
<%! List eList = (ArrayList)session.getAttribute("empList");%>
....
<table>
<%
for(int i=0; i<eList.length;i++){%>
<tr>
<td><%= ((Employee)eList[i]).getEid() %></td>
<td><%= ((Employee)eList[i]).getEname() %></td>
</tr>
<%}%>
</table>
I've had success putting text within span tags and then setting vertical-align: middle on that span. Don't know how cross-browser compliant this is though, I've only tested it in webkit browsers.
In case if you are using cynogenmod in your mobile it will disable logging by default, try this method:
In your device, open "/system/etc/init.d/" folder If there are many files, try opening each file and find for this line:
rm /dev/log/main
Now, comment this line like this: # rm /dev/log/main
save the file and reboot.
You can do it, without javascript
see this link: http://yonax73.blogspot.com/2014/09/tabla-con-cabecera-estatica-cuerpo-con.html
or live demo: http://jsfiddle.net/yonatanalexis22/aeeme8mt/7/
table{
border-spacing: 0;
display: flex;/*Se ajuste dinamicamente al tamano del dispositivo**/
max-height: 40vh; /*El alto que necesitemos**/
overflow-y: auto; /**El scroll verticalmente cuando sea necesario*/
overflow-x: hidden;/*Sin scroll horizontal*/
table-layout: fixed;/**Forzamos a que las filas tenga el mismo ancho**/
width: 98vw; /*El ancho que necesitemos*/
border:1px solid gray;}
Open Terminal.
Create a bare clone of the repository.
git clone --bare https://github.com/exampleuser/old-repository.git
Mirror-push to the new repository.
cd old-repository.git
git push --mirror https://github.com/exampleuser/new-repository.git
Here is my solution. @Maxim Shoustin's solution has some issue with sorting. I also wrap the whole thing to a directive. The only dependency is UI.Bootstrap.pagination, which did a great job on pagination.
Here is the plunker
Here is the github source code.
when using the class in constraints it's mean you can only use Reference type, another thing to add is when to use the constraint new(), it's must be the last thing you write in the Constraints terms.
You can give a link to your div by following method:
<div class="boxdiv" onClick="window.location.href='https://www.google.co.in/'">google</div>
<style type="text/css">
.boxdiv {
cursor:pointer;
width:200px;
height:200px;
background-color:#FF0000;
color:#fff;
text-align:center;
font:13px/17px Arial, Helvetica, sans-serif;
}
</style>
This is the implemented code needed:
var dataString = String(data: fooData, encoding: String.Encoding.utf8)
or just
var dataString = String(data: fooData, encoding: .utf8)
Older swift version:
in Swift 2.0:
import Foundation
var dataString = String(data: fooData, encoding: NSUTF8StringEncoding)
in Swift 1.0:
var dataString = NSString(data: fooData, encoding:NSUTF8StringEncoding)
Another easy way to copy the entire file if you're having problems using VI, is just by typing "cat filename". It will echo the file to screen and then you can just scroll up and down and copy/paste.
Try perl -MCPAN -e "upgrade /(.\*)/"
. It works fine for me.
Drop the spaces around the =
sign:
#!/bin/bash
STR="Hello World"
echo $STR
Why would UPDLOCK block selects? The Lock Compatibility Matrix clearly shows N
for the S/U and U/S contention, as in No Conflict.
As for the HOLDLOCK hint the documentation states:
HOLDLOCK: Is equivalent to SERIALIZABLE. For more information, see SERIALIZABLE later in this topic.
...
SERIALIZABLE: ... The scan is performed with the same semantics as a transaction running at the SERIALIZABLE isolation level...
and the Transaction Isolation Level topic explains what SERIALIZABLE means:
No other transactions can modify data that has been read by the current transaction until the current transaction completes.
Other transactions cannot insert new rows with key values that would fall in the range of keys read by any statements in the current transaction until the current transaction completes.
Therefore the behavior you see is perfectly explained by the product documentation:
SELECT * FROM dbo.Test WITH (UPDLOCK) WHERE ...
The real question is what are you trying to achieve? Playing with lock hints w/o an absolute complete 110% understanding of the locking semantics is begging for trouble...
After OP edit:
I would like to select rows from a table and prevent the data in that table from being modified while I am processing it.
The you should use one of the higher transaction isolation levels. REPEATABLE READ will prevent the data you read from being modified. SERIALIZABLE will prevent the data you read from being modified and new data from being inserted. Using transaction isolation levels is the right approach, as opposed to using query hints. Kendra Little has a nice poster exlaining the isolation levels.
To get the build in classes (like Array and Hash) to support as_json
and to_json
, you need to require 'json/add/core'
(see the readme for details)
I found this, and it works for me:
/(\^|\~?)(\d|x|\*)+\.(\d|x|\*)+\.(\d|x|\*)+
In Anon's answer:
"If you need something from super's __init__
to be done in addition to what is being done in the current class's __init__
, you must call it yourself, since that will not happen automatically"
It's incredible: he is wording exactly the contrary of the principle of inheritance.
It is not that "something from super's __init__
(...) will not happen automatically" , it is that it WOULD happen automatically, but it doesn't happen because the base-class' __init__
is overriden by the definition of the derived-clas __init__
So then, WHY defining a derived_class' __init__
, since it overrides what is aimed at when someone resorts to inheritance ??
It's because one needs to define something that is NOT done in the base-class' __init__
, and the only possibility to obtain that is to put its execution in a derived-class' __init__
function.
In other words, one needs something in base-class' __init__
in addition to what would be automatically done in the base-classe' __init__
if this latter wasn't overriden.
NOT the contrary.
Then, the problem is that the desired instructions present in the base-class' __init__
are no more activated at the moment of instantiation. In order to offset this inactivation, something special is required: calling explicitly the base-class' __init__
, in order to KEEP , NOT TO ADD, the initialization performed by the base-class' __init__
.
That's exactly what is said in the official doc:
An overriding method in a derived class may in fact want to extend rather than simply replace the base class method of the same name. There is a simple way to call the base class method directly: just call BaseClassName.methodname(self, arguments).
http://docs.python.org/tutorial/classes.html#inheritance
That's all the story:
when the aim is to KEEP the initialization performed by the base-class, that is pure inheritance, nothing special is needed, one must just avoid to define an __init__
function in the derived class
when the aim is to REPLACE the initialization performed by the base-class, __init__
must be defined in the derived-class
when the aim is to ADD processes to the initialization performed by the base-class, a derived-class' __init__
must be defined , comprising an explicit call to the base-class __init__
What I feel astonishing in the post of Anon is not only that he expresses the contrary of the inheritance theory, but that there have been 5 guys passing by that upvoted without turning a hair, and moreover there have been nobody to react in 2 years in a thread whose interesting subject must be read relatively often.
You should have grep
like this:
$ grep 'string1' file | grep 'string2'
A simple solution might be opening the file in Firefox.
and the text encoding will appear on the "Page Info" window.
Note: If the file is not in txt format, just rename it to txt and try again.
P.S. For more info see this article.
socket.isConnected()
returns always true once the client connects (and even after the disconnect) weird !!socket.getInputStream().read()
returns -1
if the client disconnectedsocket.getInetAddress().isReachable(int timeout)
: From isReachable(int timeout)
Test whether that address is reachable. Best effort is made by the implementation to try to reach the host, but firewalls and server configuration may block requests resulting in a unreachable status while some specific ports may be accessible. A typical implementation will use ICMP ECHO REQUESTs if the privilege can be obtained, otherwise it will try to establish a TCP connection on port 7 (Echo) of the destination host.
I think you can use db.collection.distinct(fields,query)
You will be able to get the distinct values in your case for NetworkID.
It should be something like this :
Db.collection.distinct('NetworkID')
Some people posted options for Linux and Mac, and the Windows (free) equivalent is, if you can deal with it globally:
Set Windows desktop appearance theme window background color. You can keep current/desired theme, just modify the background color of windows. By default, it is set to white. I change it to a shade of grey. I tried dark grey and black before, but then you have to change text font colors globally, and all that's painful.
But a simple shade of grey as background does the trick globally, works with any color text font as long as the shade of grey is not too dark.
It's not the best solution for all editors/IDEs, as I prefer black, but it's the next best free & global workaround on Windows.
there is no requirement of any conversion.
We can simply use xdot command in Linux which is an Interactive viewer for Graphviz dot files.
ex: xdot file.dot
for more infor:https://github.com/rakhimov/cppdep/wiki/How-to-view-or-work-with-Graphviz-Dot-files
Another easy way to handle this is to use the argument allowSetters=true
in the annotation. This will allow the password to be deserialized into your dto but it will not serialize it into a response body that uses contains object.
example:
@JsonIgnoreProperties(allowSetters = true, value = {"bar"})
class Pojo{
String foo;
String bar;
}
Both foo
and bar
are populated in the object, but only foo is written into a response body.
I have created step by step instructions on how to do this as I also was very confused about how to get this working.
How to make a self extracting archive that runs your setup.exe with 7zip -sfx switch
Here are the steps.
To make this easy create a folder c:\Install. This is where we will copy all the required files.
You need to download 7zSD.sfx
7zSD.sfx
in the bin
folder.I would recommend using NotePad++ to edit this text file as you will need to encode in UTF-8, the following instructions are using notepad++.
Enter something like this:
;!@Install@!UTF-8!
Title="SOFTWARE v1.0.0.0"
BeginPrompt="Do you want to install SOFTWARE v1.0.0.0?"
RunProgram="setup.exe"
;!@InstallEnd@!
Edit this replacing [SOFTWARE v1.0.0.0] with your product name. Notes on the parameters and options for the setup file are here.
You should now have a folder "c:\Install" with the following 3 files:
These instructions I found on the web but nowhere did it explain any of the 4 steps above.
In the command window type the following
cd \
cd Install
copy /b 7zSD.sfx + config.txt + Installer.7z MyInstaller.exe
Look in c:\Install and you will now see you have a MyInstaller.exe
Double click on MyInstaller.exe and it will prompt with your message. Click OK and the setup.exe will run.
Now that you have this working in your c:\Install directory I would create an "Install.bat" file and put the copy script in it.
copy /b 7zSD.sfx + config.txt + Installer.7z MyInstaller.exe
Now you can just edit and run the Install.bat every time you need to rebuild a new version of you deployment package.
Fix: Unlock your device before running it.
Hi Guys: Think I may have a fix for this:
Sounds ridiculous but try unlocking your Virtual Device; i.e. use your mouse to swipe and open. Your app should then work!!
The mantissa and exponent of an IEEE double floating point number are the values such that
value = sign * (1 + mantissa) * pow(2, exponent)
if the mantissa is of the form 0.101010101_base 2 (ie its most sigificant bit is shifted to be after the binary point) and the exponent is adjusted for bias.
Since 1.6, java.lang.Math also provides a direct method to get the unbiased exponent (called getExponent(double))
However, the numbers you're asking for are the integral and fractional parts of the number, which can be obtained using
integral = Math.floor(x)
fractional = x - Math.floor(x)
though you may you want to treat negative numbers differently (floor(-3.5) == -4.0)
, depending why you want the two parts.
I'd strongly suggest that you don't call these mantissa and exponent.
You're in replace mode. Press the Insert
key on your keyboard to switch back to insert mode. Many applications that handle text have this in common.
I am researching module usage in python just now and thought I would answer the question Markus asks in the comments above ("How to import variables when they are embedded in modules?") from two perspectives:
Here is how I would rewrite the main program f1.py to demonstrate variable reuse for Markus:
import f2
myStorage = f2.useMyVars(0) # initialze class and properties
for i in range(0,10):
print "Hello, "
f2.print_world()
myStorage.setMyVar(i)
f2.inc_gMyVar()
print "Display class property myVar:", myStorage.getMyVar()
print "Display global variable gMyVar:", f2.get_gMyVar()
Here is how I would rewrite the reusable module f2.py:
# Module: f2.py
# Example 1: functions to store and retrieve global variables
gMyVar = 0
def print_world():
print "World!"
def get_gMyVar():
return gMyVar # no need for global statement
def inc_gMyVar():
global gMyVar
gMyVar += 1
# Example 2: class methods to store and retrieve properties
class useMyVars(object):
def __init__(self, myVar):
self.myVar = myVar
def getMyVar(self):
return self.myVar
def setMyVar(self, myVar):
self.myVar = myVar
def print_helloWorld(self):
print "Hello, World!"
When f1.py is executed here is what the output would look like:
%run "f1.py"
Hello,
World!
Hello,
World!
Hello,
World!
Hello,
World!
Hello,
World!
Hello,
World!
Hello,
World!
Hello,
World!
Hello,
World!
Hello,
World!
Display class property myVar: 9
Display global variable gMyVar: 10
I think the point to Markus would be:
Override constructor of DbContext Try this :-
public DataContext(DbContextOptions<DataContext> option):base(option) {}
My take on it...obviously, you've got to do something with the data you read in. If it involves writing it to the sheet, that'll be deadly slow with a normal For Loop. I came up with the following based upon a rehash of some of the items there, plus some help from the Chip Pearson website.
Reading in the text file (assuming you don't know the length of the range it will create, so only the startingCell is given):
Public Sub ReadInPlainText(startCell As Range, Optional textfilename As Variant)
If IsMissing(textfilename) Then textfilename = Application.GetOpenFilename("All Files (*.*), *.*", , "Select Text File to Read")
If textfilename = "" Then Exit Sub
Dim filelength As Long
Dim filenumber As Integer
filenumber = FreeFile
filelength = filelen(textfilename)
Dim text As String
Dim textlines As Variant
Open textfilename For Binary Access Read As filenumber
text = Space(filelength)
Get #filenumber, , text
'split the file with vbcrlf
textlines = Split(text, vbCrLf)
'output to range
Dim outputRange As Range
Set outputRange = startCell
Set outputRange = outputRange.Resize(UBound(textlines), 1)
outputRange.Value = Application.Transpose(textlines)
Close filenumber
End Sub
Conversely, if you need to write out a range to a text file, this does it quickly in one print statement (note: the file 'Open' type here is in text mode, not binary..unlike the read routine above).
Public Sub WriteRangeAsPlainText(ExportRange As Range, Optional textfilename As Variant)
If IsMissing(textfilename) Then textfilename = Application.GetSaveAsFilename(FileFilter:="Text Files (*.txt), *.txt")
If textfilename = "" Then Exit Sub
Dim filenumber As Integer
filenumber = FreeFile
Open textfilename For Output As filenumber
Dim textlines() As Variant, outputvar As Variant
textlines = Application.Transpose(ExportRange.Value)
outputvar = Join(textlines, vbCrLf)
Print #filenumber, outputvar
Close filenumber
End Sub
First, you declared $db outside the function. If you want to use it inside the function, you should put this at the begining of your function code:
global $db;
And I guess, when you wrote:
if($result->num_rows){
return (mysqli_result($query, 0) == 1) ? true : false;
what you really wanted was:
if ($result->num_rows==1) { return true; } else { return false; }
Please use Homebrew Formulae page to see the list of installable packages. https://formulae.brew.sh/formula/
To install any package => command to use is :
brew install node
You can simply use this:
'07311954' in df.date.values
which returns True
or False
Here is the further explanation:
In pandas, using in
check directly with DataFrame and Series (e.g. val in df
or val in series
) will check whether the val
is contained in the Index.
BUT you can still use in
check for their values too (instead of Index)! Just using val in df.col_name.values
or val in series.values
. In this way, you are actually checking the val
with a Numpy array.
And .isin(vals)
is the other way around, it checks whether the DataFrame/Series values are in the vals
. Here vals
must be set or list-like. So this is not the natural way to go for the question.
SASS
input:-webkit-autofill
&,
&:hover,
&:focus,
&:active
transition-delay: 9999s
transition-property: background-color, color
You can implement your OTF
font using @font-face like:
@font-face {
font-family: GraublauWeb;
src: url("path/GraublauWeb.otf") format("opentype");
}
@font-face {
font-family: GraublauWeb;
font-weight: bold;
src: url("path/GraublauWebBold.otf") format("opentype");
}
// Edit: OTF now works in most browsers, see comments
However if you want to support a wide variety of browsers i would recommend you to switch to WOFF
and TTF
font types. WOFF
type is implemented by every major desktop browser, while the TTF
type is a fallback for older Safari, Android and iOS browsers. If your font is a free font, you could convert your font using for example a transfonter.
@font-face {
font-family: GraublauWeb;
src: url("path/GraublauWebBold.woff") format("woff"), url("path/GraublauWebBold.ttf") format("truetype");
}
If you want to support nearly every browser that is still out there (not necessary anymore IMHO), you should add some more font-types like:
@font-face {
font-family: GraublauWeb;
src: url("webfont.eot"); /* IE9 Compat Modes */
src: url("webfont.eot?#iefix") format("embedded-opentype"), /* IE6-IE8 */
url("webfont.woff") format("woff"), /* Modern Browsers */
url("webfont.ttf") format("truetype"), /* Safari, Android, iOS */
url("webfont.svg#svgFontName") format("svg"); /* Legacy iOS */
}
You can read more about why all these types are implemented and their hacks here. To get a detailed view of which file-types are supported by which browsers, see:
hope this helps
To run docker daemon on Linux (from CLI), run:
$ sudo service docker start # Ubuntu/Debian
Note: Skip the $
character when copy and pasting.
On RedHat/CentOS, run: sudo systemctl start docker
.
To initialize the "base" filesystem, run:
$ sudo service docker stop
$ sudo rm -rf /var/lib/docker
$ sudo service docker start
or manually like:
$ sudo docker -d --storage-opt dm.basesize=20G
docker-machine
on LinuxTo install machine binaries on Linux:
locally:
install -vm755 <(curl -L https://github.com/docker/machine/releases/download/v0.5.3/docker-machine_linux-amd64) $HOME/bin/docker-machine
global:
sudo bash -c 'install -vm755 <(curl -L https://github.com/docker/machine/releases/download/v0.5.3/docker-machine_linux-amd64) /usr/local/bin/docker-machine'
On macOS the docker
binary is only a client and you cannot use it to run the docker daemon, because Docker daemon uses Linux-specific kernel features, therefore you can’t run Docker natively in OS X. So you have to install docker-machine
in order to create VM and attach to it.
docker-machine
on macOSIf you don't have docker-machine
command yet, install it by using one of the following methods:
brew install docker-machine docker
.manually from GitHub:
install -v <(curl https://github.com/docker/machine/releases/download/v0.5.3/docker-machine_linux-amd64) /usr/local/bin/docker-machine
See: Get started with Docker for Mac.
docker-machine
on macOSTo start Docker Machine via Homebrew, run:
brew services start docker-machine
To create a default
machine (if you don't have one, see: docker-machine ls
):
docker-machine create --driver virtualbox default
Then set-up the environment for the Docker client:
eval "$(docker-machine env default)"
Then double-check by listing containers:
docker ps
See: Get started with Docker Machine and a local VM.
Alternatively to above solution, you can install a Docker app by:
brew cask install docker
Check this post for more details. See also: Cannot connect to the Docker daemon on macOS
The *_test.go
file is a Go source like the others, you can initialize a new logger every time if you need to dump complex data structure, here an example:
// initZapLog is delegated to initialize a new 'log manager'
func initZapLog() *zap.Logger {
config := zap.NewDevelopmentConfig()
config.EncoderConfig.EncodeLevel = zapcore.CapitalColorLevelEncoder
config.EncoderConfig.TimeKey = "timestamp"
config.EncoderConfig.EncodeTime = zapcore.ISO8601TimeEncoder
logger, _ := config.Build()
return logger
}
Then, every time, in every test:
func TestCreateDB(t *testing.T) {
loggerMgr := initZapLog()
// Make logger avaible everywhere
zap.ReplaceGlobals(loggerMgr)
defer loggerMgr.Sync() // flushes buffer, if any
logger := loggerMgr.Sugar()
logger.Debug("START")
conf := initConf()
/* Your test here
if false {
t.Fail()
}*/
}
Interfaces are concerned with polymorphism which is inherently tied to object instances, not classes. Therefore static doesn't make sense in the context of an interface.
You absolutely can, I use this approach a lot w/ both JavaScript and PHP.
Field definition:
<input type="hidden" name="foo" value="<?php echo $var;?>" />
Access w/ PHP:
$_GET['foo'] or $_POST['foo']
Also: Don't forget to sanitize your inputs if they are going into a database. Feel free to use my routine: https://github.com/niczak/PHP-Sanitize-Post/blob/master/sanitize.php
Cheers!
InetAddress.getLocalHost().getHostName() is the best way out of the two as this is the best abstraction at the developer level.
span.login-text {
font-size: 22px;
display:table;
margin-left: auto;
margin-right: auto;
}
<span class="login-text">Welcome To .....CMP</span>
For me it worked very well. try this also
Or You can use
grep -n . file1 |tail -LineNumberToStartWith|grep regEx
This will take care of numbering the lines in the file
grep -n . file1
This will print the last-LineNumberToStartWith
tail -LineNumberToStartWith
And finally it will grep your desired lines(which will include line number as in orignal file)
grep regEX
You may resort to tool special features. Like for DBeaver own proprietary syntax:
@set name = 'me'
SELECT :name;
SELECT ${name};
DELETE FROM book b
WHERE b.author_id IN (SELECT a.id FROM author AS a WHERE a.name = :name);
As other answers have noted, you cannot change an existing tuple, but you can always create a new tuple (which may take some or all items from existing tuples and/or other sources).
For example, if all the items of interest are in scalar variables and you know the names of those variables:
def maketuple(variables, names):
return tuple(variables[n] for n in names)
to be used, e.g, as in this example:
def example():
x = 23
y = 45
z = 67
return maketuple(vars(), 'x y z'.split())
of course this one case would be more simply expressed as (x, y, z)
(or even foregoing the names altogether, (23, 45, 67)
), but the maketuple
approach might be useful in some more complicated cases (e.g. where the names to use are also determined dynamically and appended to a list during the computation).
Added more complex example with "custom validation" on the side of controller http://jsfiddle.net/82PX4/3/
<div class='line' ng-repeat='line in ranges' ng-form='lineForm'>
low: <input type='text'
name='low'
ng-pattern='/^\d+$/'
ng-change="lowChanged(this, $index)" ng-model='line.low' />
up: <input type='text'
name='up'
ng-pattern='/^\d+$/'
ng-change="upChanged(this, $index)"
ng-model='line.up' />
<a href ng-if='!$first' ng-click='removeRange($index)'>Delete</a>
<div class='error' ng-show='lineForm.$error.pattern'>
Must be a number.
</div>
<div class='error' ng-show='lineForm.$error.range'>
Low must be less the Up.
</div>
</div>
It worked for me:
window.location = $('#myanchor').attr('href');
I was playing with this and came up with an alternative.
$ VAR=/home/me/mydir/file.c
$ DIR=`echo $VAR |xargs dirname`
$ echo $DIR
/home/me/mydir
The part I liked is it was easy to extend backup the tree:
$ DIR=`echo $VAR |xargs dirname |xargs dirname |xargs dirname`
$ echo $DIR
/home
This is what I use to get the minimum date in SQL Server. Please note that it is globalisation friendly:
CREATE FUNCTION [dbo].[DateTimeMinValue]()
RETURNS datetime
AS
BEGIN
RETURN (SELECT
CAST('17530101' AS datetime))
END
Call using:
SELECT [dbo].[DateTimeMinValue]()
Shubham's answer explains very well. This answer is addition to it as per to avoid some pitfalls and refactoring to a more readable syntax
Pitfall : There is common misconception in rendering array of objects especially if there is an update or delete action performed on data. Use case would be like deleting an item from table row. Sometimes when row which is expected to be deleted, does not get deleted and instead other row gets deleted.
To avoid this, use key
prop in root element which is looped over in JSX tree of .map()
. Also adding React's Fragment
will avoid adding another element in between of ul
and li
when rendered via calling method.
state = {
userData: [
{ id: '1', name: 'Joe', user_type: 'Developer' },
{ id: '2', name: 'Hill', user_type: 'Designer' }
]
};
deleteUser = id => {
// delete operation to remove item
};
renderItems = () => {
const data = this.state.userData;
const mapRows = data.map((item, index) => (
<Fragment key={item.id}>
<li>
{/* Passing unique value to 'key' prop, eases process for virtual DOM to remove specific element and update HTML tree */}
<span>Name : {item.name}</span>
<span>User Type: {item.user_type}</span>
<button onClick={() => this.deleteUser(item.id)}>
Delete User
</button>
</li>
</Fragment>
));
return mapRows;
};
render() {
return <ul>{this.renderItems()}</ul>;
}
Important : Decision to use which value should we pass to key
prop also matters as common way is to use index
parameter provided by .map()
.
TLDR; But there's a drawback to it and avoid it as much as possible and use any unique id
from data which is being iterated such as item.id
. There's a good article on this - https://medium.com/@robinpokorny/index-as-a-key-is-an-anti-pattern-e0349aece318
Here's what i used to get the text files with text. I used commons' IOUtils and guava's Resources.
public static String getString(String path) throws IOException {
try (InputStream stream = Resources.getResource(path).openStream()) {
return IOUtils.toString(stream);
}
}
I also had same issue on my mac. I was running 5.3.0 version. I removed that version and installed 7.2.1 version. After this it is working in my case.
Writing the whole path/directory eg. (for windows) C:\Programs\Python\Python36-32\Scripts\pip3.exe install mypackage
. This worked well for me when I had trouble with pip.
You just need to transfer the first value to float, before it gets involved in further computations:
float z = x * 1.0 / y;
echo $STRING | cut -d " " -f $N
Original article: https://helpdeskgeek.com/networking/simulate-slow-internet-connection-testing/
Simulate Slow Connection using Chrome Go ahead and install Chrome if you don’t already have it installed on your system. Once you do, open a new tab and then press CTRL + SHIFT + I to open the developer tools window or click on the hamburger icon, then More tools and then Developer tools.
This will bring up the Developer Tools window, which will probably be docked on the right side of the screen. I prefer it docked at the bottom of the screen since you can see more data. To do this, click on the three vertical dots and then click on the middle dock position.
Now go ahead and click on the Network tab. On the right, you should see a label called No Throttling.
If you click on that, you’ll get a dropdown list of a pre-configured speed that you can use to simulate a slow connection.
The choices range from Offline to WiFi and the numbers are shown as Latency, Download, Upload. The slowest is GPRS followed by Regular 2G, then Good 2G, then Regular 3G, Good 3G, Regular 4G, DSL and then WiFi. Pick one of the options and then reload the page you are on or type in another URL in the address bar. Just make sure you are in the same tab where the developer tools are being displayed. The throttling only works for the tab you have it enabled for.
If you want to use your own specific values, you can click the Add button under Custom. Click on the Add Custom Profile button to add a new profile.
When using GPRS, it took www.google.com a whopping 16 seconds to load! Overall, this is a great tool that is built right into Chrome that you can use for testing your website load time on slower connections. If you have any questions, feel free to comment. Enjoy!
Use 'a'
, 'a'
means append
. Anything written to a file opened with 'a'
attribute is written at the end of the file.
with open('file.txt', 'a') as file:
file.write('input')
The accepted answer has major drawback!
If you loaded your image that way your PictureBox will lock the image,so if you try to do any future operations on that image,you will get error message image used in another application!
This article show solution in VB
and This is C# implementation
FileStream fs = new System.IO.FileStream(@"Images\a.bmp", FileMode.Open, FileAccess.Read);
pictureBox1.Image = Image.FromStream(fs);
fs.Close();
Yes. But you can't redefine built-in types. You have to subclass them:
class MyTuple(tuple): def __add__(self, other): if len(self) != len(other): raise ValueError("tuple lengths don't match") return MyTuple(x + y for (x, y) in zip(self, other))
About using Tuple in Converter, it would be better to use 'object' instead of 'string', so that it works for all types of objects without limitation of 'string' object.
public class YourConverter : IMultiValueConverter
{
public object Convert(object[] values, ...)
{
Tuple<object, object> tuple = new Tuple<object, object>(values[0], values[1]);
return tuple;
}
}
Then execution logic in Command could be like this
public void OnExecute(object parameter)
{
var param = (Tuple<object, object>) parameter;
// e.g. for two TextBox object
var txtZip = (System.Windows.Controls.TextBox)param.Item1;
var txtCity = (System.Windows.Controls.TextBox)param.Item2;
}
and multi-bind with converter to create the parameters (with two TextBox objects)
<Button Content="Zip/City paste" Command="{Binding PasteClick}" >
<Button.CommandParameter>
<MultiBinding Converter="{StaticResource YourConvert}">
<Binding ElementName="txtZip"/>
<Binding ElementName="txtCity"/>
</MultiBinding>
</Button.CommandParameter>
</Button>
There is no if-else, just if.
<c:if test="${user.age ge 40}">
You are over the hill.
</c:if>
Optionally you can use choose-when:
<c:choose>
<c:when test="${a boolean expr}">
do something
</c:when>
<c:when test="${another boolean expr}">
do something else
</c:when>
<c:otherwise>
do this when nothing else is true
</c:otherwise>
</c:choose>
Say if you have
/**
*
*/
public KKSSocket(final KKSApp app, final String name) {
this.app = app;
this.name = name;
...
}
then a sub-class named KKSUDPSocket extending KKSSocket could have:
/**
* @param app
* @param path
* @param remoteAddr
*/
public KKSUDPSocket(KKSApp app, String path, KKSAddress remoteAddr) {
super(app, path, remoteAddr);
}
and
/**
* @param app
* @param path
*/
public KKSUDPSocket(KKSApp app, String path) {
super(app, path);
}
You simply pass the arguments up the constructor chain, like method calls to super classes, but using super(...) which references the super-class constructor and passes in the given args.
A sensible approach to scaling Docker could be:
Another docker open sourced project from Yandex:
From: http://jquery-howto.blogspot.com/2009/09/get-url-parameters-values-with-jquery.html
This is what you need :)
The following code will return a JavaScript Object containing the URL parameters:
// Read a page's GET URL variables and return them as an associative array.
function getUrlVars()
{
var vars = [], hash;
var hashes = window.location.href.slice(window.location.href.indexOf('?') + 1).split('&');
for(var i = 0; i < hashes.length; i++)
{
hash = hashes[i].split('=');
vars.push(hash[0]);
vars[hash[0]] = hash[1];
}
return vars;
}
For example, if you have the URL:
http://www.example.com/?me=myValue&name2=SomeOtherValue
This code will return:
{
"me" : "myValue",
"name2" : "SomeOtherValue"
}
and you can do:
var me = getUrlVars()["me"];
var name2 = getUrlVars()["name2"];
If you have only basic types in your array you can do this:
$copy = json_decode( json_encode($array), true);
You won't need to update the references manually
I know it won't work for everyone, but it worked for me
SET @table = 'the_table';
SELECT GROUP_CONCAT(IF(COLUMN_NAME IN ('id'), 0, CONCAT("\`", COLUMN_NAME, "\`"))) FROM INFORMATION_SCHEMA.COLUMNS
WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME = @table INTO @columns;
SET @s = CONCAT('INSERT INTO ', @table, ' SELECT ', @columns,' FROM ', @table, ' WHERE id=1');
PREPARE stmt FROM @s;
EXECUTE stmt;
Add cellpadding and cellspacing to solve it. Edit: Also removed double pixel border.
<style>
td
{border-left:1px solid black;
border-top:1px solid black;}
table
{border-right:1px solid black;
border-bottom:1px solid black;}
</style>
<html>
<body>
<table cellpadding="0" cellspacing="0">
<tr>
<td width="350" >
Foo
</td>
<td width="80" >
Foo1
</td>
<td width="65" >
Foo2
</td>
</tr>
<tr>
<td>
Bar1
</td>
<td>
Bar2
</td>
<td>
Bar3
</td>
</tr>
<tr >
<td>
Bar1
</td>
<td>
Bar2
</td>
<td>
Bar3
</td>
</tr>
</table>
</body>
</html>
I solved this problem following vestigal's tips here:
Can I set an unlimited length for maxJsonLength in web.config?
When I needed to post a large json to an action in a controller, I would get the famous "Error during deserialization using the JSON JavaScriptSerializer. The length of the string exceeds the value set on the maxJsonLength property.\r\nParameter name: input value provider".
What I did is create a new ValueProviderFactory, LargeJsonValueProviderFactory, and set the MaxJsonLength = Int32.MaxValue in the GetDeserializedObject method
public sealed class LargeJsonValueProviderFactory : ValueProviderFactory
{
private static void AddToBackingStore(LargeJsonValueProviderFactory.EntryLimitedDictionary backingStore, string prefix, object value)
{
IDictionary<string, object> dictionary = value as IDictionary<string, object>;
if (dictionary != null)
{
foreach (KeyValuePair<string, object> keyValuePair in (IEnumerable<KeyValuePair<string, object>>) dictionary)
LargeJsonValueProviderFactory.AddToBackingStore(backingStore, LargeJsonValueProviderFactory.MakePropertyKey(prefix, keyValuePair.Key), keyValuePair.Value);
}
else
{
IList list = value as IList;
if (list != null)
{
for (int index = 0; index < list.Count; ++index)
LargeJsonValueProviderFactory.AddToBackingStore(backingStore, LargeJsonValueProviderFactory.MakeArrayKey(prefix, index), list[index]);
}
else
backingStore.Add(prefix, value);
}
}
private static object GetDeserializedObject(ControllerContext controllerContext)
{
if (!controllerContext.HttpContext.Request.ContentType.StartsWith("application/json", StringComparison.OrdinalIgnoreCase))
return (object) null;
string end = new StreamReader(controllerContext.HttpContext.Request.InputStream).ReadToEnd();
if (string.IsNullOrEmpty(end))
return (object) null;
var serializer = new JavaScriptSerializer {MaxJsonLength = Int32.MaxValue};
return serializer.DeserializeObject(end);
}
/// <summary>Returns a JSON value-provider object for the specified controller context.</summary>
/// <returns>A JSON value-provider object for the specified controller context.</returns>
/// <param name="controllerContext">The controller context.</param>
public override IValueProvider GetValueProvider(ControllerContext controllerContext)
{
if (controllerContext == null)
throw new ArgumentNullException("controllerContext");
object deserializedObject = LargeJsonValueProviderFactory.GetDeserializedObject(controllerContext);
if (deserializedObject == null)
return (IValueProvider) null;
Dictionary<string, object> dictionary = new Dictionary<string, object>((IEqualityComparer<string>) StringComparer.OrdinalIgnoreCase);
LargeJsonValueProviderFactory.AddToBackingStore(new LargeJsonValueProviderFactory.EntryLimitedDictionary((IDictionary<string, object>) dictionary), string.Empty, deserializedObject);
return (IValueProvider) new DictionaryValueProvider<object>((IDictionary<string, object>) dictionary, CultureInfo.CurrentCulture);
}
private static string MakeArrayKey(string prefix, int index)
{
return prefix + "[" + index.ToString((IFormatProvider) CultureInfo.InvariantCulture) + "]";
}
private static string MakePropertyKey(string prefix, string propertyName)
{
if (!string.IsNullOrEmpty(prefix))
return prefix + "." + propertyName;
return propertyName;
}
private class EntryLimitedDictionary
{
private static int _maximumDepth = LargeJsonValueProviderFactory.EntryLimitedDictionary.GetMaximumDepth();
private readonly IDictionary<string, object> _innerDictionary;
private int _itemCount;
public EntryLimitedDictionary(IDictionary<string, object> innerDictionary)
{
this._innerDictionary = innerDictionary;
}
public void Add(string key, object value)
{
if (++this._itemCount > LargeJsonValueProviderFactory.EntryLimitedDictionary._maximumDepth)
throw new InvalidOperationException("JsonValueProviderFactory_RequestTooLarge");
this._innerDictionary.Add(key, value);
}
private static int GetMaximumDepth()
{
NameValueCollection appSettings = ConfigurationManager.AppSettings;
if (appSettings != null)
{
string[] values = appSettings.GetValues("aspnet:MaxJsonDeserializerMembers");
int result;
if (values != null && values.Length > 0 && int.TryParse(values[0], out result))
return result;
}
return 1000;
}
}
}
Then, in the Application_Start method from Global.asax.cs, replace the ValueProviderFactory with the new one:
protected void Application_Start()
{
...
//Add LargeJsonValueProviderFactory
ValueProviderFactory jsonFactory = null;
foreach (var factory in ValueProviderFactories.Factories)
{
if (factory.GetType().FullName == "System.Web.Mvc.JsonValueProviderFactory")
{
jsonFactory = factory;
break;
}
}
if (jsonFactory != null)
{
ValueProviderFactories.Factories.Remove(jsonFactory);
}
var largeJsonValueProviderFactory = new LargeJsonValueProviderFactory();
ValueProviderFactories.Factories.Add(largeJsonValueProviderFactory);
}
Here, try this (assuming it's a small file!):
<?php
echo file_get_contents( "filename.php" ); // get the contents, and echo it out.
?>
Documentation is here.
just put the autoplay="false" on source tag.. :)
It also important to make sure that the web server sends the file with Content-Disposition = inline. this might not be the case if you are reading the file yourself and send it's content to the browser:
in php it will look like this...
...headers...
header("Content-Disposition: inline; filename=doc.pdf");
...headers...
readfile('localfilepath.pdf')
You can pass a password into pg_dump directly by using the following:
pg_dump "host=localhost port=5432 dbname=mydb user=myuser password=mypass" > mydb_export.sql
The difference lies in whether mixing colours results in LIGHTER or DARKER colours. When mixing light, the result is a lighter colour, so mixing red light and blue light becomes a lighter pink. When mixing paint (or ink), red and blue become a darker purple. Mixing paint results in DARKER colours, whereas mixing light results in LIGHTER colours. Therefore for paint the primary colours are Red Yellow Blue (or Cyan Magenta Yellow) as you stated. Yet for light the primary colours are Red Green Blue. It is (virtually) impossible to mix Red Green Blue paint into Yellow paint, or mixing Red Yellow Blue light into Green light.
Here's another way
Sub testborder()
Dim rRng As Range
Set rRng = Sheet1.Range("B2:D5")
'Clear existing
rRng.Borders.LineStyle = xlNone
'Apply new borders
rRng.BorderAround xlContinuous
rRng.Borders(xlInsideHorizontal).LineStyle = xlContinuous
rRng.Borders(xlInsideVertical).LineStyle = xlContinuous
End Sub
document.getElementById("id").innerHTML='<object type="text/html" data="x.html"></object>';
I have been successfull at impersonating users in another domain, but only with a trust set up between the 2 domains.
var token = IntPtr.Zero;
var result = LogonUser(userID, domain, password, LOGON32_LOGON_INTERACTIVE, LOGON32_PROVIDER_DEFAULT, ref token);
if (result)
{
return WindowsIdentity.Impersonate(token);
}
This may not be the prettiest, but works for any dimension
a = np.array([[-1,2], [1,5], [6,7], [5,2], [3,4], [0, 0], [-1,-1]])
ranges = (0,4), (0,4)
def conditionRange(X : np.ndarray, ranges : list) -> np.ndarray:
idx = set()
for column, r in enumerate(ranges):
tmp = np.where(np.logical_and(X[:, column] >= r[0], X[:, column] <= r[1]))[0]
if idx:
idx = idx & set(tmp)
else:
idx = set(tmp)
idx = np.array(list(idx))
return X[idx, :]
b = conditionRange(a, ranges)
print(b)
Put them into a list
and use merge
with Reduce
Reduce(function(x, y) merge(x, y, all=TRUE), list(df1, df2, df3))
# id v1 v2 v3
# 1 1 1 NA NA
# 2 10 4 NA NA
# 3 2 3 4 NA
# 4 43 5 NA NA
# 5 73 2 NA NA
# 6 23 NA 2 1
# 7 57 NA 3 NA
# 8 62 NA 5 2
# 9 7 NA 1 NA
# 10 96 NA 6 NA
You can also use this more concise version:
Reduce(function(...) merge(..., all=TRUE), list(df1, df2, df3))
@bdiamante's answer may only partially help you. If you still get a message after you've suppressed warnings, it's because the pandas
library itself is printing the message. There's not much you can do about it unless you edit the Pandas source code yourself. Maybe there's an option internally to suppress them, or a way to override things, but I couldn't find one.
Suppose that you want to ensure a clean working environment. At the top of your script, you put pd.reset_option('all')
. With Pandas 0.23.4, you get the following:
>>> import pandas as pd
>>> pd.reset_option('all')
html.border has been deprecated, use display.html.border instead
(currently both are identical)
C:\projects\stackoverflow\venv\lib\site-packages\pandas\core\config.py:619: FutureWarning: html.bord
er has been deprecated, use display.html.border instead
(currently both are identical)
warnings.warn(d.msg, FutureWarning)
: boolean
use_inf_as_null had been deprecated and will be removed in a future
version. Use `use_inf_as_na` instead.
C:\projects\stackoverflow\venv\lib\site-packages\pandas\core\config.py:619: FutureWarning:
: boolean
use_inf_as_null had been deprecated and will be removed in a future
version. Use `use_inf_as_na` instead.
warnings.warn(d.msg, FutureWarning)
>>>
Following the @bdiamante's advice, you use the warnings
library. Now, true to it's word, the warnings have been removed. However, several pesky messages remain:
>>> import warnings
>>> warnings.simplefilter(action='ignore', category=FutureWarning)
>>> import pandas as pd
>>> pd.reset_option('all')
html.border has been deprecated, use display.html.border instead
(currently both are identical)
: boolean
use_inf_as_null had been deprecated and will be removed in a future
version. Use `use_inf_as_na` instead.
>>>
In fact, disabling all warnings produces the same output:
>>> import warnings
>>> warnings.simplefilter(action='ignore', category=Warning)
>>> import pandas as pd
>>> pd.reset_option('all')
html.border has been deprecated, use display.html.border instead
(currently both are identical)
: boolean
use_inf_as_null had been deprecated and will be removed in a future
version. Use `use_inf_as_na` instead.
>>>
In the standard library sense, these aren't true warnings. Pandas implements its own warnings system. Running grep -rn
on the warning messages shows that the pandas
warning system is implemented in core/config_init.py
:
$ grep -rn "html.border has been deprecated"
core/config_init.py:207:html.border has been deprecated, use display.html.border instead
Further chasing shows that I don't have time for this. And you probably don't either. Hopefully this saves you from falling down the rabbit hole or perhaps inspires someone to figure out how to truly suppress these messages!
There are at least two possible situations:
For the first one I strongly suggest NULL-ing all deleted pointers.
You have three options:
The documentation you linked actually has the answer in the link associated with the "Java class located out of the source root." Configure your source and test roots and it should work.
https://www.jetbrains.com/idea/webhelp/configuring-content-roots.html
Since you stated that these are tests you should probably go with them marked as Test Source Root instead of Source Root.
I know this has been a while, but want to add it if it helps. The way I went about with is to have two flags in the component and two ngIfs for the corresponding two flags.
It was simple and worked well with material as ng-template and material were not working well together.
Try using sed as mentioned on http://linuxcommando.blogspot.com/2008/03/using-sed-to-extract-lines-in-text-file.html. For example use
sed '2,4!d' somefile.txt
to print from the second line to the fourth line of somefile.txt. (And don't forget to check http://www.grymoire.com/Unix/Sed.html, sed is a wonderful tool.)
The operators && and || are short-circuiting, meaning they will not evaluate their right-hand expression if the value of the left-hand expression is enough to determine the result.
You can and should never assume that $_SERVER['HTTP_REFERER']
will be present.
If you control the previous page, you can pass the URL as a parameter "site.com/page2.php?prevUrl=".urlencode("site.com/page1.php")
.
If you don't control the page, then there is nothing you can do.
Use an object - with an integer as the key - rather than an array.
It can be done with the regular JavaScript function replace()
.
value.replace(".", ":");
You are passing pointers (Complex*
) when your function takes references (const Complex&
). A reference and a pointer are entirely different things. When a function expects a reference argument, you need to pass it the object directly. The reference only means that the object is not copied.
To get an object to pass to your function, you would need to dereference your pointers:
Complex::distanta(*firstComplexNumber, *secondComplexNumber);
Or get your function to take pointer arguments.
However, I wouldn't really suggest either of the above solutions. Since you don't need dynamic allocation here (and you are leaking memory because you don't delete
what you have new
ed), you're better off not using pointers in the first place:
Complex firstComplexNumber(81, 93);
Complex secondComplexNumber(31, 19);
Complex::distanta(firstComplexNumber, secondComplexNumber);
Based on the 5.10.1 version.
My solution (locally):
If you're using "fontawesome.css" or "fontawesome.min.css", try using "all.css" instead (located in the css folder).
The "css" folder and the "webfonts" folder from the fontawesome package that you downloaded must be in the same level as each other.
In my case, I already had a css folder so I just renamed the fontawesome css folder to "css-fa".
With both "css-fa" and "webfonts" in my css folder, simply link it correctly in your text editor and it should work.
Ex: link rel="stylesheet" href="css/css-fa/all.css"
Why don't you simply use the MouseDown-Event of the text box? It works fine for me and doesn't need an additional boolean. Very clean and simple, eg.:
private void textbox_MouseDown(object sender, MouseEventArgs e) {
if (textbox != null && !string.IsNullOrEmpty(textbox.Text))
{
textbox.SelectAll();
} }
If Postgres was downloaded and installed, running this should fix the issue:
sudo mkdir -p /etc/paths.d &&
echo /Applications/Postgres.app/Contents/Versions/latest/bin | sudo tee
/etc/paths.d/postgresapp
Restart the terminal and you'll be able to use psql
command.
For cases where you want to time the same stretch of code every time it gets executed (e.g. for profiling code that you think might be a bottleneck), here is a wrapper around (a slight modification to) Andreas Bonini's function that I find useful:
#ifdef _WIN32
#include <Windows.h>
#else
#include <sys/time.h>
#endif
/*
* A simple timer class to see how long a piece of code takes.
* Usage:
*
* {
* static Timer timer("name");
*
* ...
*
* timer.start()
* [ The code you want timed ]
* timer.stop()
*
* ...
* }
*
* At the end of execution, you will get output:
*
* Time for name: XXX seconds
*/
class Timer
{
public:
Timer(std::string name, bool start_running=false) :
_name(name), _accum(0), _running(false)
{
if (start_running) start();
}
~Timer() { stop(); report(); }
void start() {
if (!_running) {
_start_time = GetTimeMicroseconds();
_running = true;
}
}
void stop() {
if (_running) {
unsigned long long stop_time = GetTimeMicroseconds();
_accum += stop_time - _start_time;
_running = false;
}
}
void report() {
std::cout<<"Time for "<<_name<<": " << _accum / 1.e6 << " seconds\n";
}
private:
// cf. http://stackoverflow.com/questions/1861294/how-to-calculate-execution-time-of-a-code-snippet-in-c
unsigned long long GetTimeMicroseconds()
{
#ifdef _WIN32
/* Windows */
FILETIME ft;
LARGE_INTEGER li;
/* Get the amount of 100 nano seconds intervals elapsed since January 1, 1601 (UTC) and copy it
* * to a LARGE_INTEGER structure. */
GetSystemTimeAsFileTime(&ft);
li.LowPart = ft.dwLowDateTime;
li.HighPart = ft.dwHighDateTime;
unsigned long long ret = li.QuadPart;
ret -= 116444736000000000LL; /* Convert from file time to UNIX epoch time. */
ret /= 10; /* From 100 nano seconds (10^-7) to 1 microsecond (10^-6) intervals */
#else
/* Linux */
struct timeval tv;
gettimeofday(&tv, NULL);
unsigned long long ret = tv.tv_usec;
/* Adds the seconds (10^0) after converting them to microseconds (10^-6) */
ret += (tv.tv_sec * 1000000);
#endif
return ret;
}
std::string _name;
long long _accum;
unsigned long long _start_time;
bool _running;
};
The first parameter is the number of arguments provided and the second parameter is a list of strings representing those arguments.
As a novice programmer it can be confusing when people produce more skilled and unnecessary responses...You do not have to do any of the complicated stuff shown above!...
Here is the simplest option...In the case your keyboard appears in response to the textfield - Inside your touch screen function just add the resignFirstResponder function. As shown below - the keyboard will close because the First Responder is released (exiting the Responder chain)...
override func touchesBegan(_: Set<UITouch>, with: UIEvent?){
MyTextField.resignFirstResponder()
}
For this html:
<div class="outer">
<div class="inner"></div>
</div>
This selector should work:
$('.outer > .inner')
The browser only allows numerical inputs when the type is set to "number". Details here.
You can use the type="text" and filter out any other than numerical input using JavaScript like descripted here
md5sum
worked fine for me, but I had issues with sort
and sorting file names. So instead I sorted by md5sum
result. I also needed to exclude some files in order to create comparable results.
find . -type f -print0 \
| xargs -r0 md5sum \
| grep -v ".env" \
| grep -v "vendor/autoload.php" \
| grep -v "vendor/composer/" \
| sort -d \
| md5sum
If you didnt know that mojb
is of type MyClass
, then how can you create that variable?
If MyClass is an interface type, or a super type, then there is no need to do a cast.
From the diff man page:
-q
Report only whether the files differ, not the details of the differences.
-r
When comparing directories, recursively compare any subdirectories found.
Example command:
diff -qr dir1 dir2
Example output (depends on locale):
$ ls dir1 dir2
dir1:
same-file different only-1
dir2:
same-file different only-2
$ diff -qr dir1 dir2
Files dir1/different and dir2/different differ
Only in dir1: only-1
Only in dir2: only-2
I don't really understand why you would make this an HTML Helper. I would make it part of the ViewData dictionary in an action method of the controller. Something like this:
ViewData["Age"] = DateTime.Now.Year - birthday.Year;
Given that birthday is passed into an action method and is a DateTime object.
If you're down here... I'm sorry the other options didn't workout. Try this:
conda install -c menpo opencv3
from Step 1 of Scivision's Tutorial. If that doesn't work, then go on to Step 2:
(Windows only) OpenCV 3.2 pip install
Download OpenCV .whl file here. The packages that mention
contrib
in their name include OpenCV-extra packages. For example, assuming you have Python 3.6, you might downloadopencv_python-3.2.0+contrib-cp36-none-win_amd64.whl
to get the OpenCV-extra packages.Then, from Command Prompt:
pip install opencv_python-3...yourVersion...win_amd64.whl
Note that the ...win_amd64.whl
wheels packages from step 2 in that tutorial are meant for AMD chips.
outgoing url in mvc generated based on the current routing schema.
because your Information action method require id parameter, and your route collection has id of your current requested url(/Admin/Information/5), id parameter automatically gotten from existing route collection values.
to solve this problem you should use UrlParameter.Optional:
<a href="@Url.Action("Information", "Admin", new { id = UrlParameter.Optional })">Add an Admin</a>
Homebrew and macports both solve the same problem - that is the installation of common libraries and utilities that are not bundled with osx.
Typically these are development related libraries and the most common use of these tools is for developers working on osx.
They both need the xcode command line tools installed (which you can download separately from https://developer.apple.com/), and for some specific packages you will need the entire xcode IDE installed.
xcode can be installed from the mac app store, its a free download but it takes a while since its around 5GB (if I remember correctly).
macports is an osx version of the port utility from BSD (as osx is derived from BSD, this was a natural choice). For anyone familiar with any of the BSD distributions, macports will feel right at home.
One major difference between homebrew and macports; and the reason I prefer homebrew is that it will not overwrite things that should be installed "natively" in osx. This means that if there is a native package available, homebrew will notify you instead of overwriting it and causing problems further down the line. It also installs libraries in the user space (thus, you don't need to use "sudo" to install things). This helps when getting rid of libraries as well since everything is in a path accessible to you.
homebrew also enjoys a more active user community and its packages (called formulas) are updated quite often.
macports does not overwrite native OSX packages - it supplies its own version - This is the main reason I prefer macports over home-brew, you need to be certain of what you are using and Apple's change at different times to the ports and have been know to be years behind updates in some projects
Can you give a reference showing that macports overwrites native OS X packages? As far as I can tell, all macports installation happens in
/opt/local
Perhaps I should clarify - I did not say anywhere in my answer that macports overwrites OSX native packages. They both install items separately.
Homebrew will warn you when you should install things "natively" (using the library/tool's preferred installer) for better compatibility. This is what I meant. It will also use as many of the local libraries that are available in OS X. From the wiki:
We really don’t like dupes in Homebrew/homebrew
However, we do like dupes in the tap!
Stuff that comes with OS X or is a library that is provided by RubyGems, CPAN or PyPi should not be duped. There are good reasons for this:
- Duplicate libraries regularly break builds
- Subtle bugs emerge with duplicate libraries, and to a lesser extent, duplicate tools
- We want you to try harder to make your formula work with what OS X comes with
You can optionally overwrite the macosx supplied versions of utilities with homebrew.
Timer.Elapsed
expects method of specific signature (with arguments object
and EventArgs
). If you want to use your PlayMusicEvent
method with additional argument evaluated during event registration, you can use lambda expression as an adapter:
myTimer.Elapsed += new ElapsedEventHandler((sender, e) => PlayMusicEvent(sender, e, musicNote));
Edit: you can also use shorter version:
myTimer.Elapsed += (sender, e) => PlayMusicEvent(sender, e, musicNote);
To debug optimized code, learn assembly/machine language.
Use the GDB TUI mode. My copy of GDB enables it when I type the minus and Enter. Then type C-x 2 (that is hold down Control and press X, release both and then press 2). That will put it into split source and disassembly display. Then use stepi
and nexti
to move one machine instruction at a time. Use C-x o to switch between the TUI windows.
Download a PDF about your CPU's machine language and the function calling conventions. You will quickly learn to recognize what is being done with function arguments and return values.
You can display the value of a register by using a GDB command like p $eax
clrscr
is not standard C function. According to internet, it used to be a thing in old Borland C.
Is clrscr(); a function in C++?
you can try using this
System.Web.HttpContext.Current.Server.MapPath(path);
or use HostingEnvironment.MapPath
System.Web.Hosting.HostingEnvironment.MapPath(path);
This is originally from Sara's blog.
It also works with almost any version of Visual Studio, you just need to change the "8.0" in the registry key to the appropriate version number for your version of Visual Studio.
The guide line shows up in the Output window too. (Visual Studio 2010 corrects this, and the line only shows up in the code editor window.)
You can also have the guide in multiple columns by listing more than one number after the color specifier:
RGB(230,230,230), 4, 80
Puts a white line at column 4 and column 80. This should be the value of a string value Guides
in "Text Editor" key (see bellow).
Be sure to pick a line color that will be visisble on your background. This color won't show up on the default background color in VS. This is the value for a light grey: RGB(221, 221, 221).
Here are the registry keys that I know of:
Visual Studio 2010: HKCU\Software\Microsoft\VisualStudio\10.0\Text Editor
Visual Studio 2008: HKCU\Software\Microsoft\VisualStudio\9.0\Text Editor
Visual Studio 2005: HKCU\Software\Microsoft\VisualStudio\8.0\Text Editor
Visual Studio 2003: HKCU\Software\Microsoft\VisualStudio\7.1\Text Editor
For those running Visual Studio 2010, you may want to install the following extensions rather than changing the registry yourself:
http://visualstudiogallery.msdn.microsoft.com/en-us/0fbf2878-e678-4577-9fdb-9030389b338c
http://visualstudiogallery.msdn.microsoft.com/en-us/7f2a6727-2993-4c1d-8f58-ae24df14ea91
These are also part of the Productivity Power Tools, which includes many other very useful extensions.
This looks like it might be the answer to your question. It says it's using Spring, but I think that should still help you in your case. Let me inline the code here so it's more convenient:
import java.io.FileReader;
import org.codehaus.jackson.map.ObjectMapper;
import org.codehaus.jackson.map.ObjectWriter;
public class Foo
{
public static void main(String[] args) throws Exception
{
ObjectMapper mapper = new ObjectMapper();
MyClass myObject = mapper.readValue(new FileReader("input.json"), MyClass.class);
// this is Jackson 1.x API only:
ObjectWriter writer = mapper.defaultPrettyPrintingWriter();
// ***IMPORTANT!!!*** for Jackson 2.x use the line below instead of the one above:
// ObjectWriter writer = mapper.writer().withDefaultPrettyPrinter();
System.out.println(writer.writeValueAsString(myObject));
}
}
class MyClass
{
String one;
String[] two;
MyOtherClass three;
public String getOne() {return one;}
void setOne(String one) {this.one = one;}
public String[] getTwo() {return two;}
void setTwo(String[] two) {this.two = two;}
public MyOtherClass getThree() {return three;}
void setThree(MyOtherClass three) {this.three = three;}
}
class MyOtherClass
{
String four;
String[] five;
public String getFour() {return four;}
void setFour(String four) {this.four = four;}
public String[] getFive() {return five;}
void setFive(String[] five) {this.five = five;}
}
I faced the same issue. To get rid of this issue, I followed the below steps and it worked for me.
You don't need an IIF() at all here. The comparisons return true or false anyway.
Also, since this row visibility is on a group row, make sure you use the same aggregate function on the fields as you use in the fields in the row. So if your group row shows sums, then you'd put this in the Hidden property.
=Sum(Fields!OpeningStock.Value) = 0 And
Sum(Fields!GrossDispatched.Value) = 0 And
Sum(Fields!TransferOutToMW.Value) = 0 And
Sum(Fields!TransferOutToDW.Value) = 0 And
Sum(Fields!TransferOutToOW.Value) = 0 And
Sum(Fields!NetDispatched.Value) = 0 And
Sum(Fields!QtySold.Value) = 0 And
Sum(Fields!StockAdjustment.Value) = 0 And
Sum(Fields!ClosingStock.Value) = 0
But with the above version, if one record has value 1 and one has value -1 and all others are zero then sum is also zero and the row could be hidden. If that's not what you want you could write a more complex expression:
=Sum(
IIF(
Fields!OpeningStock.Value=0 AND
Fields!GrossDispatched.Value=0 AND
Fields!TransferOutToMW.Value=0 AND
Fields!TransferOutToDW.Value=0 AND
Fields!TransferOutToOW.Value=0 AND
Fields!NetDispatched.Value=0 AND
Fields!QtySold.Value=0 AND
Fields!StockAdjustment.Value=0 AND
Fields!ClosingStock.Value=0,
0,
1
)
) = 0
This is essentially a fancy way of counting the number of rows in which any field is not zero. If every field is zero for every row in the group then the expression returns true and the row is hidden.
This is a procedure to configure run release version
1- Change build variants to release version.
Another way
@Html.TextAreaFor(model => model.Comments[0].Comment)
And in your css do this
textarea
{
font-family: inherit;
width: 650px;
height: 65px;
}
That DataType dealie allows carriage returns in the data, not everybody likes those.
You can also use @hourly
instant of 0 * * * *
As DPA says, the easiest way to generate a war file of your project is through the IDE. Open the Files tab from your left hand panel, right click on the build.xml file and tell it what type of ant target you want to run.
Two Solutions:
Better Approach:
<script type="text/javascript">
$('#btn').click(function() {
var id = $(this).attr('id');
alert(id);
});
</script>
<input id="btn" type="button" value="click" />
But, if you REALLY need to do the click handler inline, this will work:
<script type="text/javascript">
function display(el) {
var id = $(el).attr('id');
alert(id);
}
</script>
<input id="btn" type="button" value="click" OnClick="display(this);" />
You could have the extension set a cookie and have your websites JavaScript check if that cookie is present and update accordingly. This and probably most other methods mentioned here could of course be cirvumvented by the user, unless you try and have the extension create custom cookies depending on timestamps etc, and have your application analyze them server side to see if it really is a user with the extension or someone pretending to have it by modifying his cookies.
SET collation_connection = 'utf8_general_ci';
then for your databases
ALTER DATABASE your_database_name CHARACTER SET utf8 COLLATE utf8_general_ci;
ALTER TABLE your_table_name CONVERT TO CHARACTER SET utf8 COLLATE utf8_general_ci;
MySQL sneaks swedish in there sometimes for no sensible reason.
It's in the python docs.
import datetime
datetime.datetime.combine(datetime.date(2011, 1, 1),
datetime.time(10, 23))
returns
datetime.datetime(2011, 1, 1, 10, 23)
That should work - so no, there is nothing wrong with your code. However, it could also be done with a dict:
{type(str()): do_something_with_a_string,
type(dict()): do_something_with_a_dict}.get(type(x), errorhandler)()
A bit more concise and pythonic wouldn't you say?
Edit.. Heeding Avisser's advice, the code also works like this, and looks nicer:
{str: do_something_with_a_string,
dict: do_something_with_a_dict}.get(type(x), errorhandler)()
You should never use a ScrollView with a ListView, because ListView takes care of its own vertical scrolling. Most importantly, doing this defeats all of the important optimizations in ListView for dealing with large lists, since it effectively forces the ListView to display its entire list of items to fill up the infinite container supplied by ScrollView.
http://developer.android.com/reference/android/widget/ScrollView.html
Your assumptions don't seem to be right. After a clear()
, the newly added data start from index 0.
I think the below method is the best solution
class Program
{
static string UppercaseWords(string value)
{
char[] array = value.ToCharArray();
// Handle the first letter in the string.
if (array.Length >= 1)
{
if (char.IsLower(array[0]))
{
array[0] = char.ToUpper(array[0]);
}
}
// Scan through the letters, checking for spaces.
// ... Uppercase the lowercase letters following spaces.
for (int i = 1; i < array.Length; i++)
{
if (array[i - 1] == ' ')
{
if (char.IsLower(array[i]))
{
array[i] = char.ToUpper(array[i]);
}
}
}
return new string(array);
}
static void Main()
{
// Uppercase words in these strings.
const string value1 = "something in the way";
const string value2 = "dot net PERLS";
const string value3 = "String_two;three";
const string value4 = " sam";
// ... Compute the uppercase strings.
Console.WriteLine(UppercaseWords(value1));
Console.WriteLine(UppercaseWords(value2));
Console.WriteLine(UppercaseWords(value3));
Console.WriteLine(UppercaseWords(value4));
}
}
Output
Something In The Way
Dot Net PERLS
String_two;three
Sam
I use "xor" (it seems it's a keyword; in Code::Blocks at least it gets bold) just as you can use "and" instead of &&
and "or" instead of ||
.
if (first xor second)...
Yes, it is bitwise. Sorry.
You can do this:
DECLARE @maxval TINYINT, @minval TINYINT
select @maxval=24,@minval=5
SELECT CAST(((@maxval + 1) - @minval) *
RAND(CHECKSUM(NEWID())) + @minval AS TINYINT)
And that was taken directly from this link, I don't really know how to give proper credit for this answer.
As Hunter McMillen mentioned, tuples are immutable, you need to create a new tuple in order to achieve this. For instance:
>>> tpl = ('275', '54000', '0.0', '5000.0', '0.0')
>>> change_value = 200
>>> tpl = (change_value,) + tpl[1:]
>>> tpl
(200, '54000', '0.0', '5000.0', '0.0')
Use any of these
legend.spacing = unit(1,"cm")
legend.spacing.x = unit(1,"cm")
legend.spacing.y = unit(1,"cm")
On my Linux I see an error with
adb shell "su -c '[your command goes here]'"
su: invalid uid/gid '-c'
The solution is on Linux
adb shell su 0 '[your command goes here]'
set as it is export JAVA_HOME=/usr/java/jdk1.8.0_31.and run with sudo it will execute..
. given a path, how can we recursively create all the folders necessary to create the file .. for that path
Creates all directories and subdirectories as specified by path.
Directory.CreateDirectory(path);
then you may create a file.
For character processing, use Unicode strings:
PythonWin 3.3.0 (v3.3.0:bd8afb90ebf2, Sep 29 2012, 10:57:17) [MSC v.1600 64 bit (AMD64)] on win32.
>>> s='ABC??def'
>>> import re
>>> re.sub(r'[^\x00-\x7f]',r' ',s) # Each char is a Unicode codepoint.
'ABC def'
>>> b = s.encode('utf8')
>>> re.sub(rb'[^\x00-\x7f]',rb' ',b) # Each char is a 3-byte UTF-8 sequence.
b'ABC def'
But note you will still have a problem if your string contains decomposed Unicode characters (separate character and combining accent marks, for example):
>>> s = 'mañana'
>>> len(s)
6
>>> import unicodedata as ud
>>> n=ud.normalize('NFD',s)
>>> n
'man~ana'
>>> len(n)
7
>>> re.sub(r'[^\x00-\x7f]',r' ',s) # single codepoint
'ma ana'
>>> re.sub(r'[^\x00-\x7f]',r' ',n) # only combining mark replaced
'man ana'
Access from Windows by Git Bash console:
scp root@ip:/etc/../your-file "C:/Users/XXX/Download"
I fixed this problem.The device system version is older then the sdk minSdkVersion? I just modified the minSdkVersion from android_L to 19 to target my nexus 4.4.4.
buildscript {
repositories {
jcenter()
}
dependencies {
classpath 'com.android.tools.build:gradle:0.12.2'
}
}
apply plugin: 'com.android.application'
repositories {
jcenter()
}
android {
**compileSdkVersion 'android-L'** modified to 19
buildToolsVersion "20.0.0"
defaultConfig {
applicationId "com.antwei.uiframework.ui"
minSdkVersion 14
targetSdkVersion 'L'
versionCode 1
versionName "1.0"
}
buildTypes {
release {
runProguard false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
**compile 'com.android.support:support-v4:21.+'** modified to compile 'com.android.support:support-v4:20.0.0'
}
how to modified the value by ide. select file->Project Structure -> Facets -> android-gradle and then modified the compile Sdk Version from android_L to 19
sorry I don't have enough reputation to add pictures
Since JSR 305 (whose goal was to standardize @NonNull
and @Nullable
) has been dormant for several years, I'm afraid there is no good answer. All we can do is to find a pragmatic solution and mine is as follows:
From a purely stylistic standpoint I would like to avoid any reference to IDE, framework or any toolkit except Java itself.
This rules out:
android.support.annotation
edu.umd.cs.findbugs.annotations
org.eclipse.jdt.annotation
org.jetbrains.annotations
org.checkerframework.checker.nullness.qual
lombok.NonNull
Which leaves us with either javax.validation.constraints
or javax.annotation
.
The former comes with JEE. If this is better than javax.annotation
, which might come eventually with JSE or never at all, is a matter of debate.
I personally prefer javax.annotation
because I wouldn't like the JEE dependency.
This leaves us with
javax.annotation
which is also the shortest one.
There is only one syntax which would even be better: java.annotation.Nullable
. As other packages graduated
from javax
to java
in the past, the javax.annotation would
be a step in the right direction.
I was hoping that they all have basically the same trivial implementation, but a detailed analysis showed that this is not true.
First for the similarities:
The @NonNull
annotations all have the line
public @interface NonNull {}
except for
org.jetbrains.annotations
which calls it @NotNull
and has a trivial implementationjavax.annotation
which has a longer implementationjavax.validation.constraints
which also calls it @NotNull
and has an implementationThe @Nullable
annotations all have the line
public @interface Nullable {}
except for (again) the org.jetbrains.annotations
with their trivial implementation.
For the differences:
A striking one is that
javax.annotation
javax.validation.constraints
org.checkerframework.checker.nullness.qual
all have runtime annotations (@Retention(RUNTIME)
), while
android.support.annotation
edu.umd.cs.findbugs.annotations
org.eclipse.jdt.annotation
org.jetbrains.annotations
are only compile time (@Retention(CLASS)
).
As described in this SO answer the impact of runtime annotations is smaller than one might think, but they have the benefit of enabling tools to do runtime checks in addition to the compile time ones.
Another important difference is where in the code the annotations can be used. There are two different approaches. Some packages use JLS 9.6.4.1 style contexts. The following table gives an overview:
FIELD METHOD PARAMETER LOCAL_VARIABLE android.support.annotation X X X edu.umd.cs.findbugs.annotations X X X X org.jetbrains.annotation X X X X lombok X X X X javax.validation.constraints X X X
org.eclipse.jdt.annotation
, javax.annotation
and org.checkerframework.checker.nullness.qual
use the contexts defined in
JLS 4.11, which is in my opinion the right way to do it.
This leaves us with
javax.annotation
org.checkerframework.checker.nullness.qual
in this round.
To help you to compare further details yourself I list the code of every annotation below.
To make comparison easier I removed comments, imports and the @Documented
annotation.
(they all had @Documented
except for the classes from the Android package).
I reordered the lines and @Target
fields and normalized the qualifications.
package android.support.annotation;
@Retention(CLASS)
@Target({FIELD, METHOD, PARAMETER})
public @interface NonNull {}
package edu.umd.cs.findbugs.annotations;
@Retention(CLASS)
@Target({FIELD, METHOD, PARAMETER, LOCAL_VARIABLE})
public @interface NonNull {}
package org.eclipse.jdt.annotation;
@Retention(CLASS)
@Target({ TYPE_USE })
public @interface NonNull {}
package org.jetbrains.annotations;
@Retention(CLASS)
@Target({FIELD, METHOD, PARAMETER, LOCAL_VARIABLE})
public @interface NotNull {String value() default "";}
package javax.annotation;
@TypeQualifier
@Retention(RUNTIME)
public @interface Nonnull {
When when() default When.ALWAYS;
static class Checker implements TypeQualifierValidator<Nonnull> {
public When forConstantValue(Nonnull qualifierqualifierArgument,
Object value) {
if (value == null)
return When.NEVER;
return When.ALWAYS;
}
}
}
package org.checkerframework.checker.nullness.qual;
@Retention(RUNTIME)
@Target({TYPE_USE, TYPE_PARAMETER})
@SubtypeOf(MonotonicNonNull.class)
@ImplicitFor(
types = {
TypeKind.PACKAGE,
TypeKind.INT,
TypeKind.BOOLEAN,
TypeKind.CHAR,
TypeKind.DOUBLE,
TypeKind.FLOAT,
TypeKind.LONG,
TypeKind.SHORT,
TypeKind.BYTE
},
literals = {LiteralKind.STRING}
)
@DefaultQualifierInHierarchy
@DefaultFor({TypeUseLocation.EXCEPTION_PARAMETER})
@DefaultInUncheckedCodeFor({TypeUseLocation.PARAMETER, TypeUseLocation.LOWER_BOUND})
public @interface NonNull {}
For completeness, here are the @Nullable
implementations:
package android.support.annotation;
@Retention(CLASS)
@Target({METHOD, PARAMETER, FIELD})
public @interface Nullable {}
package edu.umd.cs.findbugs.annotations;
@Target({FIELD, METHOD, PARAMETER, LOCAL_VARIABLE})
@Retention(CLASS)
public @interface Nullable {}
package org.eclipse.jdt.annotation;
@Retention(CLASS)
@Target({ TYPE_USE })
public @interface Nullable {}
package org.jetbrains.annotations;
@Retention(CLASS)
@Target({FIELD, METHOD, PARAMETER, LOCAL_VARIABLE})
public @interface Nullable {String value() default "";}
package javax.annotation;
@TypeQualifierNickname
@Nonnull(when = When.UNKNOWN)
@Retention(RUNTIME)
public @interface Nullable {}
package org.checkerframework.checker.nullness.qual;
@Retention(RUNTIME)
@Target({TYPE_USE, TYPE_PARAMETER})
@SubtypeOf({})
@ImplicitFor(
literals = {LiteralKind.NULL},
typeNames = {java.lang.Void.class}
)
@DefaultInUncheckedCodeFor({TypeUseLocation.RETURN, TypeUseLocation.UPPER_BOUND})
public @interface Nullable {}
The following two packages have no @Nullable
, so I list them separately; Lombok has a pretty boring @NonNull
.
In javax.validation.constraints
the @NonNull
is actually a @NotNull
and it has a longish implementation.
package lombok;
@Retention(CLASS)
@Target({FIELD, METHOD, PARAMETER, LOCAL_VARIABLE})
public @interface NonNull {}
package javax.validation.constraints;
@Retention(RUNTIME)
@Target({ FIELD, METHOD, ANNOTATION_TYPE, CONSTRUCTOR, PARAMETER })
@Constraint(validatedBy = {})
public @interface NotNull {
String message() default "{javax.validation.constraints.NotNull.message}";
Class<?>[] groups() default { };
Class<? extends Payload>[] payload() default {};
@Target({ METHOD, FIELD, ANNOTATION_TYPE, CONSTRUCTOR, PARAMETER })
@Retention(RUNTIME)
@Documented
@interface List {
NotNull[] value();
}
}
From my experience, javax.annotation
is at least supported by Eclipse and the Checker Framework out of the box.
My ideal annotation would be the java.annotation
syntax with the Checker Framework implementation.
If you don't intend to use the Checker Framework the javax.annotation
(JSR-305) is still your best bet for the time being.
If you are willing to buy into the Checker Framework just use
their org.checkerframework.checker.nullness.qual
.
android.support.annotation
from android-5.1.1_r1.jar
edu.umd.cs.findbugs.annotations
from findbugs-annotations-1.0.0.jar
org.eclipse.jdt.annotation
from org.eclipse.jdt.annotation_2.1.0.v20160418-1457.jar
org.jetbrains.annotations
from jetbrains-annotations-13.0.jar
javax.annotation
from gwt-dev-2.5.1-sources.jar
org.checkerframework.checker.nullness.qual
from checker-framework-2.1.9.zip
lombok
from lombok
commit f6da35e4c4f3305ecd1b415e2ab1b9ef8a9120b4
javax.validation.constraints
from validation-api-1.0.0.GA-sources.jar
You can iterate over the object to get the keys or values:
function numKeys(obj)
{
var count = 0;
for(var prop in obj)
{
count++;
}
return count;
}
It looks like a "spelling mistake" but just want to point out that your example is invalid syntax, should be
var object = {"key1":"value1","key2":"value2","key3":"value3"};
Having learned of this feature only just now while reading your question, I can only speculate. This seems to provide several advantages over a file-level static variable:
I'd be interested in learning if anyone has used anonymous namespaces in real code.
After checking the default locations on Win7 with mysql --help
and unable to find any config file, I manually searched for my.ini and found it at C:\ProgramData\MySQL\MySQL Server x.y
(yep, ProgramData
, not Program Files
).
Though I used an own my.ini at Program Files
, the other configuration overwrote my settings.
Why are there extra spaces between my month and day? Why does't it just put them next to each other?
So your output will be aligned.
If you don't want padding use the format modifier FM
:
SELECT TO_CHAR (date_field, 'fmMonth DD, YYYY')
FROM ...;
Reference: Format Model Modifiers
After coming back to my own question after 5 year and seeing so many people found this useful, a little update.
A string variable can be split into a list
by using the split function (it can contain similar values, set
is for the assignment) . I haven't found this function in the official documentation but it works similar to normal Python. The items can be called via an index, used in a loop or like Dave suggested if you know the values, it can set variables like a tuple.
{% set list1 = variable1.split(';') %}
The grass is {{ list1[0] }} and the boat is {{ list1[1] }}
or
{% set list1 = variable1.split(';') %}
{% for item in list1 %}
<p>{{ item }}<p/>
{% endfor %}
or
{% set item1, item2 = variable1.split(';') %}
The grass is {{ item1 }} and the boat is {{ item2 }}
Use delegate
and event.target
. delegate
takes advantage of the event bubbling by letting one element listen for, and handle, events on child elements. target
is the jQ-normalized property of the event
object representing the object from which the event originated.
$(document).delegate('*', 'click', function (event) {
// event.target is the element
// $(event.target).text() gets its text
});
To verify only first letter is number or character -- For number Character.isDigit(str.charAt(0)) --return true
For character Character.isLetter(str.charAt(0)) --return true
super is a keyword. It is used inside a sub-class method definition to call a method defined in the superclass. Private methods of the superclass cannot be called. Only public and protected methods can be called by the super keyword. It is also used by class constructors to invoke constructors of its parent class.
Check here for further explanation.
Here is a post which introduces different types of keystore in Java and the differences among different types of keystore. http://www.pixelstech.net/article/1408345768-Different-types-of-keystore-in-Java----Overview
Below are the descriptions of different keystores from the post:
JKS, Java Key Store. You can find this file at sun.security.provider.JavaKeyStore. This keystore is Java specific, it usually has an extension of jks. This type of keystore can contain private keys and certificates, but it cannot be used to store secret keys. Since it's a Java specific keystore, so it cannot be used in other programming languages.
JCEKS, JCE key store. You can find this file at com.sun.crypto.provider.JceKeyStore. This keystore has an extension of jceks. The entries which can be put in the JCEKS keystore are private keys, secret keys and certificates.
PKCS12, this is a standard keystore type which can be used in Java and other languages. You can find this keystore implementation at sun.security.pkcs12.PKCS12KeyStore. It usually has an extension of p12 or pfx. You can store private keys, secret keys and certificates on this type.
PKCS11, this is a hardware keystore type. It servers an interface for the Java library to connect with hardware keystore devices such as Luna, nCipher. You can find this implementation at sun.security.pkcs11.P11KeyStore. When you load the keystore, you no need to create a specific provider with specific configuration. This keystore can store private keys, secret keys and cetrificates. When loading the keystore, the entries will be retrieved from the keystore and then converted into software entries.
You can try to use the following code instead:
$pro= model_name::where('col_name', '=', 'value')->get();
This would work too
git branch --set-upstream-to=/< remote>/< branch> < localbranch>
Tweaking percentages from the left is a little brittle for my liking. When I need something like this I tend to add my container styling to a wrapper element and then apply the background on the inner element with background-position: right bottom
<style>
.wrapper {
background-color: #333;
border: solid 3px #222;
padding: 20px;
}
.bg-img {
background-image: url(path/to/img.png);
background-position: right bottom;
background-repeat: no-repeat;
}
.content-breakout {
margin: -20px
}
</style>
<div class="wrapper">
<div class="bg-img">
<div class="content-breakout"></div>
</div>
</div>
The .content-breakout
class is optional and will allow your content to eat into the padding if required (negative margin values should match the corresponding values in the wrapper padding). It's a little verbose, but works reliably without having to be concerned about the relative positioning of the image compared to its width and height.
From Removing All Event Handlers:
Directly no, in large part because you cannot simply set the event to null.
Indirectly, you could make the actual event private and create a property around it that tracks all of the delegates being added/subtracted to it.
Take the following:
List<EventHandler> delegates = new List<EventHandler>(); private event EventHandler MyRealEvent; public event EventHandler MyEvent { add { MyRealEvent += value; delegates.Add(value); } remove { MyRealEvent -= value; delegates.Remove(value); } } public void RemoveAllEvents() { foreach(EventHandler eh in delegates) { MyRealEvent -= eh; } delegates.Clear(); }
Magic: Unknown semantic
Symbolic Constant -> Provides both correct semantic and correct context for use
Semantic: The meaning or purpose of a thing.
"Create a constant, name it after the meaning, and replace the number with it." -- Martin Fowler
First, magic numbers are not just numbers. Any basic value can be "magic". Basic values are manifest entities such as integers, reals, doubles, floats, dates, strings, booleans, characters, and so on. The issue is not the data type, but the "magic" aspect of the value as it appears in our code text.
What do we mean by "magic"? To be precise: By "magic", we intend to point to the semantics (meaning or purpose) of the value in the context of our code; that it is unknown, unknowable, unclear, or confusing. This is the notion of "magic". A basic value is not magic when its semantic meaning or purpose-of-being-there is quickly and easily known, clear, and understood (not confusing) from the surround context without special helper words (e.g. symbolic constant).
Therefore, we identify magic numbers by measuring the ability of a code reader to know, be clear, and understand the meaning and purpose of a basic value from its surrounding context. The less known, less clear, and more confused the reader is, the more "magic" the basic value is.
We have two scenarios for our magic basic values. Only the second is of primary importance for programmers and code:
An overarching dependency of "magic" is how the lone basic value (e.g. number) has no commonly known semantic (like Pi), but has a locally known semantic (e.g. your program), which is not entirely clear from context or could be abused in good or bad context(s).
The semantics of most programming languages will not allow us to use lone basic values, except (perhaps) as data (i.e. tables of data). When we encounter "magic numbers", we generally do so in a context. Therefore, the answer to
"Do I replace this magic number with a symbolic constant?"
is:
"How quickly can you assess and understand the semantic meaning of the number (its purpose for being there) in its context?"
With this thought in mind, we can quickly see how a number like Pi (3.14159) is not a "magic number" when placed in proper context (e.g. 2 x 3.14159 x radius or 2*Pi*r). Here, the number 3.14159 is mentally recognized Pi without the symbolic constant identifier.
Still, we generally replace 3.14159 with a symbolic constant identifier like Pi because of the length and complexity of the number. The aspects of length and complexity of Pi (coupled with a need for accuracy) usually means the symbolic identifier or constant is less prone to error. Recognition of "Pi" as a name is a simply a convenient bonus, but is not the primary reason for having the constant.
Laying aside common constants like Pi, let's focus primarily on numbers with special meanings, but which those meanings are constrained to the universe of our software system. Such a number might be "2" (as a basic integer value).
If I use the number 2 by itself, my first question might be: What does "2" mean? The meaning of "2" by itself is unknown and unknowable without context, leaving its use unclear and confusing. Even though having just "2" in our software will not happen because of language semantics, we do want to see that "2" by itself carries no special semantics or obvious purpose being alone.
Let's put our lone "2" in a context of: padding := 2
, where the context is a "GUI Container". In this context the meaning of 2 (as pixels or other graphical unit) offers us a quick guess of its semantics (meaning and purpose). We might stop here and say that 2 is okay in this context and there is nothing else we need to know. However, perhaps in our software universe this is not the whole story. There is more to it, but "padding = 2" as a context cannot reveal it.
Let's further pretend that 2 as pixel padding in our program is of the "default_padding" variety throughout our system. Therefore, writing the instruction padding = 2
is not good enough. The notion of "default" is not revealed. Only when I write: padding = default_padding
as a context and then elsewhere: default_padding = 2
do I fully realize a better and fuller meaning (semantic and purpose) of 2 in our system.
The example above is pretty good because "2" by itself could be anything. Only when we limit the range and domain of understanding to "my program" where 2 is the default_padding
in the GUI UX parts of "my program", do we finally make sense of "2" in its proper context. Here "2" is a "magic" number, which is factored out to a symbolic constant default_padding
within the context of the GUI UX of "my program" in order to make it use as default_padding
quickly understood in the greater context of the enclosing code.
Thus, any basic value, whose meaning (semantic and purpose) cannot be sufficiently and quickly understood is a good candidate for a symbolic constant in the place of the basic value (e.g. magic number).
Numbers on a scale might have semantics as well. For example, pretend we are making a D&D game, where we have the notion of a monster. Our monster object has a feature called life_force
, which is an integer. The numbers have meanings that are not knowable or clear without words to supply meaning. Thus, we begin by arbitrarily saying:
From the symbolic constants above, we start to get a mental picture of the aliveness, deadness, and "undeadness" (and possible ramifications or consequences) for our monsters in our D&D game. Without these words (symbolic constants), we are left with just the numbers ranging from -10 .. 10
. Just the range without the words leaves us in a place of possibly great confusion and potentially with errors in our game if different parts of the game have dependencies on what that range of numbers means to various operations like attack_elves
or seek_magic_healing_potion
.
Therefore, when searching for and considering replacement of "magic numbers" we want to ask very purpose-filled questions about the numbers within the context of our software and even how the numbers interact semantically with each other.
Let's review what questions we ought to ask:
You might have a magic number if ...
Examine stand-alone manifest constant basic values in your code text. Ask each question slowly and thoughtfully about each instance of such a value. Consider the strength of your answer. Many times, the answer is not black and white, but has shades of misunderstood meaning and purpose, speed of learning, and speed of comprehension. There is also a need to see how it connects to the software machine around it.
In the end, the answer to replacement is answer the measure (in your mind) of the strength or weakness of the reader to make the connection (e.g. "get it"). The more quickly they understand meaning and purpose, the less "magic" you have.
CONCLUSION: Replace basic values with symbolic constants only when the magic is large enough to cause difficult to detect bugs arising from confusions.
Use the .length
property. It is not a function.
alert($('.class').length); // alerts a nonnegative number
the library already have Java/Kotlin support, see github.
To simplify I did a class to be used simply, I added it on Encryption library to use it you just do as follow:
Add the gradle library:
compile 'se.simbio.encryption:library:2.0.0'
and use it:
Encryption encryption = Encryption.getDefault("Key", "Salt", new byte[16]);
String encrypted = encryption.encryptOrNull("top secret string");
String decrypted = encryption.decryptOrNull(encrypted);
if you not want add the Encryption library you can just copy the following class to your project. If you are in an android project you need to import android Base64 in this class, if you are in a pure java project you need to add this class manually you can get it here
Encryption.java
package se.simbio.encryption;
import java.io.UnsupportedEncodingException;
import java.security.InvalidAlgorithmParameterException;
import java.security.InvalidKeyException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
import java.security.spec.InvalidKeySpecException;
import java.security.spec.KeySpec;
import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.PBEKeySpec;
import javax.crypto.spec.SecretKeySpec;
/**
* A class to make more easy and simple the encrypt routines, this is the core of Encryption library
*/
public class Encryption {
/**
* The Builder used to create the Encryption instance and that contains the information about
* encryption specifications, this instance need to be private and careful managed
*/
private final Builder mBuilder;
/**
* The private and unique constructor, you should use the Encryption.Builder to build your own
* instance or get the default proving just the sensible information about encryption
*/
private Encryption(Builder builder) {
mBuilder = builder;
}
/**
* @return an default encryption instance or {@code null} if occur some Exception, you can
* create yur own Encryption instance using the Encryption.Builder
*/
public static Encryption getDefault(String key, String salt, byte[] iv) {
try {
return Builder.getDefaultBuilder(key, salt, iv).build();
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
return null;
}
}
/**
* Encrypt a String
*
* @param data the String to be encrypted
*
* @return the encrypted String or {@code null} if you send the data as {@code null}
*
* @throws UnsupportedEncodingException if the Builder charset name is not supported or if
* the Builder charset name is not supported
* @throws NoSuchAlgorithmException if the Builder digest algorithm is not available
* or if this has no installed provider that can
* provide the requested by the Builder secret key
* type or it is {@code null}, empty or in an invalid
* format
* @throws NoSuchPaddingException if no installed provider can provide the padding
* scheme in the Builder digest algorithm
* @throws InvalidAlgorithmParameterException if the specified parameters are inappropriate for
* the cipher
* @throws InvalidKeyException if the specified key can not be used to initialize
* the cipher instance
* @throws InvalidKeySpecException if the specified key specification cannot be used
* to generate a secret key
* @throws BadPaddingException if the padding of the data does not match the
* padding scheme
* @throws IllegalBlockSizeException if the size of the resulting bytes is not a
* multiple of the cipher block size
* @throws NullPointerException if the Builder digest algorithm is {@code null} or
* if the specified Builder secret key type is
* {@code null}
* @throws IllegalStateException if the cipher instance is not initialized for
* encryption or decryption
*/
public String encrypt(String data) throws UnsupportedEncodingException, NoSuchAlgorithmException, NoSuchPaddingException, InvalidAlgorithmParameterException, InvalidKeyException, InvalidKeySpecException, BadPaddingException, IllegalBlockSizeException {
if (data == null) return null;
SecretKey secretKey = getSecretKey(hashTheKey(mBuilder.getKey()));
byte[] dataBytes = data.getBytes(mBuilder.getCharsetName());
Cipher cipher = Cipher.getInstance(mBuilder.getAlgorithm());
cipher.init(Cipher.ENCRYPT_MODE, secretKey, mBuilder.getIvParameterSpec(), mBuilder.getSecureRandom());
return Base64.encodeToString(cipher.doFinal(dataBytes), mBuilder.getBase64Mode());
}
/**
* This is a sugar method that calls encrypt method and catch the exceptions returning
* {@code null} when it occurs and logging the error
*
* @param data the String to be encrypted
*
* @return the encrypted String or {@code null} if you send the data as {@code null}
*/
public String encryptOrNull(String data) {
try {
return encrypt(data);
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
/**
* This is a sugar method that calls encrypt method in background, it is a good idea to use this
* one instead the default method because encryption can take several time and with this method
* the process occurs in a AsyncTask, other advantage is the Callback with separated methods,
* one for success and other for the exception
*
* @param data the String to be encrypted
* @param callback the Callback to handle the results
*/
public void encryptAsync(final String data, final Callback callback) {
if (callback == null) return;
new Thread(new Runnable() {
@Override
public void run() {
try {
String encrypt = encrypt(data);
if (encrypt == null) {
callback.onError(new Exception("Encrypt return null, it normally occurs when you send a null data"));
}
callback.onSuccess(encrypt);
} catch (Exception e) {
callback.onError(e);
}
}
}).start();
}
/**
* Decrypt a String
*
* @param data the String to be decrypted
*
* @return the decrypted String or {@code null} if you send the data as {@code null}
*
* @throws UnsupportedEncodingException if the Builder charset name is not supported or if
* the Builder charset name is not supported
* @throws NoSuchAlgorithmException if the Builder digest algorithm is not available
* or if this has no installed provider that can
* provide the requested by the Builder secret key
* type or it is {@code null}, empty or in an invalid
* format
* @throws NoSuchPaddingException if no installed provider can provide the padding
* scheme in the Builder digest algorithm
* @throws InvalidAlgorithmParameterException if the specified parameters are inappropriate for
* the cipher
* @throws InvalidKeyException if the specified key can not be used to initialize
* the cipher instance
* @throws InvalidKeySpecException if the specified key specification cannot be used
* to generate a secret key
* @throws BadPaddingException if the padding of the data does not match the
* padding scheme
* @throws IllegalBlockSizeException if the size of the resulting bytes is not a
* multiple of the cipher block size
* @throws NullPointerException if the Builder digest algorithm is {@code null} or
* if the specified Builder secret key type is
* {@code null}
* @throws IllegalStateException if the cipher instance is not initialized for
* encryption or decryption
*/
public String decrypt(String data) throws UnsupportedEncodingException, NoSuchAlgorithmException, InvalidKeySpecException, NoSuchPaddingException, InvalidAlgorithmParameterException, InvalidKeyException, BadPaddingException, IllegalBlockSizeException {
if (data == null) return null;
byte[] dataBytes = Base64.decode(data, mBuilder.getBase64Mode());
SecretKey secretKey = getSecretKey(hashTheKey(mBuilder.getKey()));
Cipher cipher = Cipher.getInstance(mBuilder.getAlgorithm());
cipher.init(Cipher.DECRYPT_MODE, secretKey, mBuilder.getIvParameterSpec(), mBuilder.getSecureRandom());
byte[] dataBytesDecrypted = (cipher.doFinal(dataBytes));
return new String(dataBytesDecrypted);
}
/**
* This is a sugar method that calls decrypt method and catch the exceptions returning
* {@code null} when it occurs and logging the error
*
* @param data the String to be decrypted
*
* @return the decrypted String or {@code null} if you send the data as {@code null}
*/
public String decryptOrNull(String data) {
try {
return decrypt(data);
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
/**
* This is a sugar method that calls decrypt method in background, it is a good idea to use this
* one instead the default method because decryption can take several time and with this method
* the process occurs in a AsyncTask, other advantage is the Callback with separated methods,
* one for success and other for the exception
*
* @param data the String to be decrypted
* @param callback the Callback to handle the results
*/
public void decryptAsync(final String data, final Callback callback) {
if (callback == null) return;
new Thread(new Runnable() {
@Override
public void run() {
try {
String decrypt = decrypt(data);
if (decrypt == null) {
callback.onError(new Exception("Decrypt return null, it normally occurs when you send a null data"));
}
callback.onSuccess(decrypt);
} catch (Exception e) {
callback.onError(e);
}
}
}).start();
}
/**
* creates a 128bit salted aes key
*
* @param key encoded input key
*
* @return aes 128 bit salted key
*
* @throws NoSuchAlgorithmException if no installed provider that can provide the requested
* by the Builder secret key type
* @throws UnsupportedEncodingException if the Builder charset name is not supported
* @throws InvalidKeySpecException if the specified key specification cannot be used to
* generate a secret key
* @throws NullPointerException if the specified Builder secret key type is {@code null}
*/
private SecretKey getSecretKey(char[] key) throws NoSuchAlgorithmException, UnsupportedEncodingException, InvalidKeySpecException {
SecretKeyFactory factory = SecretKeyFactory.getInstance(mBuilder.getSecretKeyType());
KeySpec spec = new PBEKeySpec(key, mBuilder.getSalt().getBytes(mBuilder.getCharsetName()), mBuilder.getIterationCount(), mBuilder.getKeyLength());
SecretKey tmp = factory.generateSecret(spec);
return new SecretKeySpec(tmp.getEncoded(), mBuilder.getKeyAlgorithm());
}
/**
* takes in a simple string and performs an sha1 hash
* that is 128 bits long...we then base64 encode it
* and return the char array
*
* @param key simple inputted string
*
* @return sha1 base64 encoded representation
*
* @throws UnsupportedEncodingException if the Builder charset name is not supported
* @throws NoSuchAlgorithmException if the Builder digest algorithm is not available
* @throws NullPointerException if the Builder digest algorithm is {@code null}
*/
private char[] hashTheKey(String key) throws UnsupportedEncodingException, NoSuchAlgorithmException {
MessageDigest messageDigest = MessageDigest.getInstance(mBuilder.getDigestAlgorithm());
messageDigest.update(key.getBytes(mBuilder.getCharsetName()));
return Base64.encodeToString(messageDigest.digest(), Base64.NO_PADDING).toCharArray();
}
/**
* When you encrypt or decrypt in callback mode you get noticed of result using this interface
*/
public interface Callback {
/**
* Called when encrypt or decrypt job ends and the process was a success
*
* @param result the encrypted or decrypted String
*/
void onSuccess(String result);
/**
* Called when encrypt or decrypt job ends and has occurred an error in the process
*
* @param exception the Exception related to the error
*/
void onError(Exception exception);
}
/**
* This class is used to create an Encryption instance, you should provide ALL data or start
* with the Default Builder provided by the getDefaultBuilder method
*/
public static class Builder {
private byte[] mIv;
private int mKeyLength;
private int mBase64Mode;
private int mIterationCount;
private String mSalt;
private String mKey;
private String mAlgorithm;
private String mKeyAlgorithm;
private String mCharsetName;
private String mSecretKeyType;
private String mDigestAlgorithm;
private String mSecureRandomAlgorithm;
private SecureRandom mSecureRandom;
private IvParameterSpec mIvParameterSpec;
/**
* @return an default builder with the follow defaults:
* the default char set is UTF-8
* the default base mode is Base64
* the Secret Key Type is the PBKDF2WithHmacSHA1
* the default salt is "some_salt" but can be anything
* the default length of key is 128
* the default iteration count is 65536
* the default algorithm is AES in CBC mode and PKCS 5 Padding
* the default secure random algorithm is SHA1PRNG
* the default message digest algorithm SHA1
*/
public static Builder getDefaultBuilder(String key, String salt, byte[] iv) {
return new Builder()
.setIv(iv)
.setKey(key)
.setSalt(salt)
.setKeyLength(128)
.setKeyAlgorithm("AES")
.setCharsetName("UTF8")
.setIterationCount(1)
.setDigestAlgorithm("SHA1")
.setBase64Mode(Base64.DEFAULT)
.setAlgorithm("AES/CBC/PKCS5Padding")
.setSecureRandomAlgorithm("SHA1PRNG")
.setSecretKeyType("PBKDF2WithHmacSHA1");
}
/**
* Build the Encryption with the provided information
*
* @return a new Encryption instance with provided information
*
* @throws NoSuchAlgorithmException if the specified SecureRandomAlgorithm is not available
* @throws NullPointerException if the SecureRandomAlgorithm is {@code null} or if the
* IV byte array is null
*/
public Encryption build() throws NoSuchAlgorithmException {
setSecureRandom(SecureRandom.getInstance(getSecureRandomAlgorithm()));
setIvParameterSpec(new IvParameterSpec(getIv()));
return new Encryption(this);
}
/**
* @return the charset name
*/
private String getCharsetName() {
return mCharsetName;
}
/**
* @param charsetName the new charset name
*
* @return this instance to follow the Builder patter
*/
public Builder setCharsetName(String charsetName) {
mCharsetName = charsetName;
return this;
}
/**
* @return the algorithm
*/
private String getAlgorithm() {
return mAlgorithm;
}
/**
* @param algorithm the algorithm to be used
*
* @return this instance to follow the Builder patter
*/
public Builder setAlgorithm(String algorithm) {
mAlgorithm = algorithm;
return this;
}
/**
* @return the key algorithm
*/
private String getKeyAlgorithm() {
return mKeyAlgorithm;
}
/**
* @param keyAlgorithm the keyAlgorithm to be used in keys
*
* @return this instance to follow the Builder patter
*/
public Builder setKeyAlgorithm(String keyAlgorithm) {
mKeyAlgorithm = keyAlgorithm;
return this;
}
/**
* @return the Base 64 mode
*/
private int getBase64Mode() {
return mBase64Mode;
}
/**
* @param base64Mode set the base 64 mode
*
* @return this instance to follow the Builder patter
*/
public Builder setBase64Mode(int base64Mode) {
mBase64Mode = base64Mode;
return this;
}
/**
* @return the type of aes key that will be created, on KITKAT+ the API has changed, if you
* are getting problems please @see <a href="http://android-developers.blogspot.com.br/2013/12/changes-to-secretkeyfactory-api-in.html">http://android-developers.blogspot.com.br/2013/12/changes-to-secretkeyfactory-api-in.html</a>
*/
private String getSecretKeyType() {
return mSecretKeyType;
}
/**
* @param secretKeyType the type of AES key that will be created, on KITKAT+ the API has
* changed, if you are getting problems please @see <a href="http://android-developers.blogspot.com.br/2013/12/changes-to-secretkeyfactory-api-in.html">http://android-developers.blogspot.com.br/2013/12/changes-to-secretkeyfactory-api-in.html</a>
*
* @return this instance to follow the Builder patter
*/
public Builder setSecretKeyType(String secretKeyType) {
mSecretKeyType = secretKeyType;
return this;
}
/**
* @return the value used for salting
*/
private String getSalt() {
return mSalt;
}
/**
* @param salt the value used for salting
*
* @return this instance to follow the Builder patter
*/
public Builder setSalt(String salt) {
mSalt = salt;
return this;
}
/**
* @return the key
*/
private String getKey() {
return mKey;
}
/**
* @param key the key.
*
* @return this instance to follow the Builder patter
*/
public Builder setKey(String key) {
mKey = key;
return this;
}
/**
* @return the length of key
*/
private int getKeyLength() {
return mKeyLength;
}
/**
* @param keyLength the length of key
*
* @return this instance to follow the Builder patter
*/
public Builder setKeyLength(int keyLength) {
mKeyLength = keyLength;
return this;
}
/**
* @return the number of times the password is hashed
*/
private int getIterationCount() {
return mIterationCount;
}
/**
* @param iterationCount the number of times the password is hashed
*
* @return this instance to follow the Builder patter
*/
public Builder setIterationCount(int iterationCount) {
mIterationCount = iterationCount;
return this;
}
/**
* @return the algorithm used to generate the secure random
*/
private String getSecureRandomAlgorithm() {
return mSecureRandomAlgorithm;
}
/**
* @param secureRandomAlgorithm the algorithm to generate the secure random
*
* @return this instance to follow the Builder patter
*/
public Builder setSecureRandomAlgorithm(String secureRandomAlgorithm) {
mSecureRandomAlgorithm = secureRandomAlgorithm;
return this;
}
/**
* @return the IvParameterSpec bytes array
*/
private byte[] getIv() {
return mIv;
}
/**
* @param iv the byte array to create a new IvParameterSpec
*
* @return this instance to follow the Builder patter
*/
public Builder setIv(byte[] iv) {
mIv = iv;
return this;
}
/**
* @return the SecureRandom
*/
private SecureRandom getSecureRandom() {
return mSecureRandom;
}
/**
* @param secureRandom the Secure Random
*
* @return this instance to follow the Builder patter
*/
public Builder setSecureRandom(SecureRandom secureRandom) {
mSecureRandom = secureRandom;
return this;
}
/**
* @return the IvParameterSpec
*/
private IvParameterSpec getIvParameterSpec() {
return mIvParameterSpec;
}
/**
* @param ivParameterSpec the IvParameterSpec
*
* @return this instance to follow the Builder patter
*/
public Builder setIvParameterSpec(IvParameterSpec ivParameterSpec) {
mIvParameterSpec = ivParameterSpec;
return this;
}
/**
* @return the message digest algorithm
*/
private String getDigestAlgorithm() {
return mDigestAlgorithm;
}
/**
* @param digestAlgorithm the algorithm to be used to get message digest instance
*
* @return this instance to follow the Builder patter
*/
public Builder setDigestAlgorithm(String digestAlgorithm) {
mDigestAlgorithm = digestAlgorithm;
return this;
}
}
}
We use this method. It looks too simple to work, but it was well-tested in our app and in fact works surprisingly well in all cases, including going to home screen by "home" button, by "return" button, or after screen lock. Give it a try.
Idea is, when in foreground, Android always starts new activity just before stopping previous one. That's not guaranteed, but that's how it works. BTW, Flurry seems to use the same logic (just a guess, I didn't check that, but it hooks at the same events).
public abstract class BaseActivity extends Activity {
private static int sessionDepth = 0;
@Override
protected void onStart() {
super.onStart();
sessionDepth++;
if(sessionDepth == 1){
//app came to foreground;
}
}
@Override
protected void onStop() {
super.onStop();
if (sessionDepth > 0)
sessionDepth--;
if (sessionDepth == 0) {
// app went to background
}
}
}
Edit: as per comments, we also moved to onStart() in later versions of the code. Also, I'm adding super calls, which were missing from my initial post, because this was more of a concept than a working code.
Call super.OnMessageReceived()
in the Overriden method. This worked for me!
Finally!
NameSpace
using System.Resources;
using System.Diagnostics;
Method
private static bool IsDebug()
{
object[] customAttributes = Assembly.GetExecutingAssembly().GetCustomAttributes(typeof(DebuggableAttribute), false);
if ((customAttributes != null) && (customAttributes.Length == 1))
{
DebuggableAttribute attribute = customAttributes[0] as DebuggableAttribute;
return (attribute.IsJITOptimizerDisabled && attribute.IsJITTrackingEnabled);
}
return false;
}
Include javascript using script tags just before your ending body tag. Preferably you will want to put it in a separate file and link to it to keep things a little more organized and easier to read. Theres a simple article here that will show you how http://www.selftaughtweb.com/how-to-include-javascript/
I had the same problem but we can use the time zone we want
we use .toLocaleDateString()
eg:
var day=new Date();
const options= {day:'numeric', month:'long', year:"numeric", timeZone:"Asia/Kolkata"};
const today=day.toLocaleDateString("en-IN", options);
console.log(today);
_x000D_
By default, it begins by processing the first target that does not begin with a .
aka the default goal; to do that, it may have to process other targets - specifically, ones the first target depends on.
The GNU Make Manual covers all this stuff, and is a surprisingly easy and informative read.
Websocket and WebRTC can be used together, Websocket as a signal channel of WebRTC, and webrtc is a video/audio/text channel, also WebRTC can be in UDP also in TURN relay, TURN relay support TCP HTTP also HTTPS. Many projects use Websocket and WebRTC together.
To upload image with form fields
SaveFileWithData(article: ArticleModel,picture:File): Observable<ArticleModel>
{
let headers = new Headers();
// headers.append('Content-Type', 'multipart/form-data');
// headers.append('Accept', 'application/json');
let requestoptions = new RequestOptions({
method: RequestMethod.Post,
headers:headers
});
let formData: FormData = new FormData();
if (picture != null || picture != undefined) {
formData.append('files', picture, picture.name);
}
formData.append("article",JSON.stringify(article));
return this.http.post("url",formData,requestoptions)
.map((response: Response) => response.json() as ArticleModel);
}
In my case I needed .NET Web Api in C#
// POST: api/Articles
[ResponseType(typeof(Article))]
public async Task<IHttpActionResult> PostArticle()
{
Article article = null;
try
{
HttpPostedFile postedFile = null;
var httpRequest = HttpContext.Current.Request;
if (httpRequest.Files.Count == 1)
{
postedFile = httpRequest.Files[0];
var filePath = HttpContext.Current.Server.MapPath("~/" + postedFile.FileName);
postedFile.SaveAs(filePath);
}
var json = httpRequest.Form["article"];
article = JsonConvert.DeserializeObject <Article>(json);
if (!ModelState.IsValid)
{
return BadRequest(ModelState);
}
article.CreatedDate = DateTime.Now;
article.CreatedBy = "Abbas";
db.articles.Add(article);
await db.SaveChangesAsync();
}
catch (Exception ex)
{
int a = 0;
}
return CreatedAtRoute("DefaultApi", new { id = article.Id }, article);
}
Try this:
$objPHPExcel->getActiveSheet()->getRowDimension('1')->setRowHeight(40);
As Sotirios explains, you can not use the ParameterizedTypeReference
, but ParameterizedTypeReference is used only to provide Type
to the object mapper, and as you have the class that is removed when type erasure happens, you can create your own ParameterizedType
and pass that to RestTemplate
, so that the object mapper can reconstruct the object you need.
First you need to have the ParameterizedType interface implemented, you can find an implementation in Google Gson project here.
Once you add the implementation to your project, you can extend the abstract ParameterizedTypeReference
like this:
class FakeParameterizedTypeReference<T> extends ParameterizedTypeReference<T> {
@Override
public Type getType() {
Type [] responseWrapperActualTypes = {MyClass.class};
ParameterizedType responseWrapperType = new ParameterizedTypeImpl(
ResponseWrapper.class,
responseWrapperActualTypes,
null
);
return responseWrapperType;
}
}
And then you can pass that to your exchange function:
template.exchange(
uri,
HttpMethod.POST,
null,
new FakeParameterizedTypeReference<ResponseWrapper<T>>());
With all the type information present object mapper will properly construct your ResponseWrapper<MyClass>
object
The test parameter mentioned by tobrien allows you to specify a method using a # before the method name. This should work for JUnit and TestNG. I've never tried it, just read it on the Surefire Plugin page:
Specify this parameter to run individual tests by file name, overriding the includes/excludes parameters. Each pattern you specify here will be used to create an include pattern formatted like **/${test}.java, so you can just type "-Dtest=MyTest" to run a single test called "foo/MyTest.java". This parameter overrides the includes/excludes parameters, and the TestNG suiteXmlFiles parameter. since 2.7.3 You can execute a limited number of method in the test with adding #myMethod or #my*ethod. Si type "-Dtest=MyTest#myMethod" supported for junit 4.x and testNg
The excellent joda-time library is almost always a better choice than Java's Date or Calendar classes. Here's a few examples:
DateTime aDate = new DateTime(year, month, day, hour, minute, second);
DateTime anotherDate = new DateTime(anotherYear, anotherMonth, anotherDay, ...);
if (aDate.isAfter(anotherDate)) {...}
DateTime yearFromADate = aDate.plusYears(1);
EDIT: As of 2019, e.metaKey
is supported on all major browsers as per the MDN.
Note that on Windows, although the ? Windows key is considered to be the "meta" key, it is not going to be captured by browsers as such.
This is only for the command key on MacOS/keyboards.
Unlike Shift/Alt/Ctrl, the Cmd (“Apple”) key is not considered a modifier key—instead, you should listen on keydown
/keyup
and record when a key is pressed and then depressed based on event.keyCode
.
Unfortunately, these key codes are browser-dependent:
224
17
91
(Left Command) or 93
(Right Command)You might be interested in reading the article JavaScript Madness: Keyboard Events, from which I learned that knowledge.
<script>
function show() {
if(document.getElementById('benefits').style.display=='none') {
document.getElementById('benefits').style.display='block';
}
return false;
}
function hide() {
if(document.getElementById('benefits').style.display=='block') {
document.getElementById('benefits').style.display='none';
}
return false;
}
</script>
<div id="opener"><a href="#1" name="1" onclick="return show();">click here</a></div>
<div id="benefits" style="display:none;">some input in here plus the close button
<div id="upbutton"><a onclick="return hide();">click here</a></div>
</div>
You could try either of these. They are not giving me errors.
It is also the suggested method from typescript for array declaration.
By using the Array<Thing>
it is making use of the generics in typescript. It is similar to asking for a List<T>
in c# code.
// Declare with default value
private _possessions: Array<Thing> = new Array<Thing>();
// or
private _possessions: Array<Thing> = [];
// or -> prefered by ts-lint
private _possessions: Thing[] = [];
or
// declare
private _possessions: Array<Thing>;
// or -> preferd by ts-lint
private _possessions: Thing[];
constructor(){
//assign
this._possessions = new Array<Thing>();
//or
this._possessions = [];
}
You may use str.isdigit()
and str.isalpha()
to check whether given string is positive integer and alphabet respectively.
Sample Results:
# For alphabet
>>> 'A'.isdigit()
False
>>> 'A'.isalpha()
True
# For digit
>>> '1'.isdigit()
True
>>> '1'.isalpha()
False
str.isdigit()
returns False
if the string is a negative number or a float number. For example:
# returns `False` for float
>>> '123.3'.isdigit()
False
# returns `False` for negative number
>>> '-123'.isdigit()
False
If you want to also check for the negative integers and float
, then you may write a custom function to check for it as:
def is_number(n):
try:
float(n) # Type-casting the string to `float`.
# If string is not a valid `float`,
# it'll raise `ValueError` exception
except ValueError:
return False
return True
Sample Run:
>>> is_number('123') # positive integer number
True
>>> is_number('123.4') # positive float number
True
>>> is_number('-123') # negative integer number
True
>>> is_number('-123.4') # negative `float` number
True
>>> is_number('abc') # `False` for "some random" string
False
The above functions will return True
for the "NAN" (Not a number) string because for Python it is valid float representing it is not a number. For example:
>>> is_number('NaN')
True
In order to check whether the number is "NaN", you may use math.isnan()
as:
>>> import math
>>> nan_num = float('nan')
>>> math.isnan(nan_num)
True
Or if you don't want to import additional library to check this, then you may simply check it via comparing it with itself using ==
. Python returns False
when nan
float is compared with itself. For example:
# `nan_num` variable is taken from above example
>>> nan_num == nan_num
False
Hence, above function is_number
can be updated to return False
for "NaN"
as:
def is_number(n):
is_number = True
try:
num = float(n)
# check for "nan" floats
is_number = num == num # or use `math.isnan(num)`
except ValueError:
is_number = False
return is_number
Sample Run:
>>> is_number('Nan') # not a number "Nan" string
False
>>> is_number('nan') # not a number string "nan" with all lower cased
False
>>> is_number('123') # positive integer
True
>>> is_number('-123') # negative integer
True
>>> is_number('-1.12') # negative `float`
True
>>> is_number('abc') # "some random" string
False
The above function will still return you False
for the complex numbers. If you want your is_number
function to treat complex numbers as valid number, then you need to type cast your passed string to complex()
instead of float()
. Then your is_number
function will look like:
def is_number(n):
is_number = True
try:
# v type-casting the number here as `complex`, instead of `float`
num = complex(n)
is_number = num == num
except ValueError:
is_number = False
return is_number
Sample Run:
>>> is_number('1+2j') # Valid
True # : complex number
>>> is_number('1+ 2j') # Invalid
False # : string with space in complex number represetantion
# is treated as invalid complex number
>>> is_number('123') # Valid
True # : positive integer
>>> is_number('-123') # Valid
True # : negative integer
>>> is_number('abc') # Invalid
False # : some random string, not a valid number
>>> is_number('nan') # Invalid
False # : not a number "nan" string
PS: Each operation for each check depending on the type of number comes with additional overhead. Choose the version of is_number
function which fits your requirement.