Can I set a breakpoint on 'memory access' in GDB?
Use watch to see when a variable is written to, rwatch when it is read and awatch when it is read/written from/to, as noted above. However, please note that to use this command, you must break the program, and the variable must be in scope when you've broken the program:
Use the watch command. The argument to the watch command is an expression that is evaluated. This implies that the variabel you want to set a watchpoint on must be in the current scope. So, to set a watchpoint on a non-global variable, you must have set a breakpoint that will stop your program when the variable is in scope. You set the watchpoint after the program breaks.
Python append() vs. + operator on lists, why do these give different results?
you should use extend()
>>> c=[1,2,3]
>>> c.extend(c)
>>> c
[1, 2, 3, 1, 2, 3]
other info: append vs. extend
CSS how to make scrollable list
Another solution would be as below where the list is placed under a drop-down button.
<button class="btn dropdown-toggle btn-primary btn-sm" data-toggle="dropdown"
>Markets<span class="caret"></span></button>
<ul class="dropdown-menu", style="height:40%; overflow:hidden; overflow-y:scroll;">
{{ form.markets }}
</ul>
Set The Window Position of an application via command line
You can use nircmd project here: http://www.nirsoft.net/utils/nircmd.html
Example code:
nircmd win move ititle "cmd.exe" 5 5 10 10
nircmd win setsize ititle "cmd.exe" 30 30 100 200
nircmd cmdwait 1000 win setsize ititle "cmd.exe" 30 30 1000 600
php foreach with multidimensional array
Ideally a multidimensional array is usually an array of arrays so i figured declare an empty array, then create key and value pairs from the db result in a separate array, finally push each array created on iteration into the outer array. you can return the outer array in case this is a separate function call. Hope that helps
$response = array();
foreach ($res as $result) {
$elements = array("firstname" => $result[0], "subject_name" => $result[1]);
array_push($response, $elements);
}
Using OpenGl with C#?
I think what @korona meant was since it's just a C API, you can consume it from C# directly with a heck of a lot of typing like this:
[DllImport("opengl32")]
public static extern void glVertex3f(float x, float y, float z);
You unfortunately would need to do this for every single OpenGL function you call, and is basically what Tao has done for you.
Centering a canvas
Tested only on Firefox:
<script>
window.onload = window.onresize = function() {
var C = 0.8; // canvas width to viewport width ratio
var W_TO_H = 2/1; // canvas width to canvas height ratio
var el = document.getElementById("a");
// For IE compatibility http://www.google.com/search?q=get+viewport+size+js
var viewportWidth = window.innerWidth;
var viewportHeight = window.innerHeight;
var canvasWidth = viewportWidth * C;
var canvasHeight = canvasWidth / W_TO_H;
el.style.position = "fixed";
el.setAttribute("width", canvasWidth);
el.setAttribute("height", canvasHeight);
el.style.top = (viewportHeight - canvasHeight) / 2;
el.style.left = (viewportWidth - canvasWidth) / 2;
window.ctx = el.getContext("2d");
ctx.clearRect(0,0,canvasWidth,canvasHeight);
ctx.fillStyle = 'yellow';
ctx.moveTo(0, canvasHeight/2);
ctx.lineTo(canvasWidth/2, 0);
ctx.lineTo(canvasWidth, canvasHeight/2);
ctx.lineTo(canvasWidth/2, canvasHeight);
ctx.lineTo(0, canvasHeight/2);
ctx.fill()
}
</script>
<body>
<canvas id="a" style="background: black">
</canvas>
</body>
WPF loading spinner
Here's an example of an all-xaml solution. It binds to an "IsWorking" boolean in the viewmodel to show the control and start the animation.
<UserControl x:Class="MainApp.Views.SpinnerView"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
mc:Ignorable="d"
d:DesignHeight="300" d:DesignWidth="300">
<UserControl.Resources>
<BooleanToVisibilityConverter x:Key="BoolToVisConverter"/>
</UserControl.Resources>
<StackPanel Orientation="Horizontal" Margin="5"
Visibility="{Binding IsWorking, Converter={StaticResource BoolToVisConverter}}">
<Label>Wait...</Label>
<Ellipse x:Name="spinnerEllipse"
Width="20" Height="20">
<Ellipse.Fill>
<LinearGradientBrush StartPoint="1,1" EndPoint="0,0" >
<GradientStop Color="White" Offset="0"/>
<GradientStop Color="CornflowerBlue" Offset="1"/>
</LinearGradientBrush>
</Ellipse.Fill>
<Ellipse.RenderTransform>
<RotateTransform x:Name="SpinnerRotate" CenterX="10" CenterY="10"/>
</Ellipse.RenderTransform>
<Ellipse.Style>
<Style TargetType="Ellipse">
<Style.Triggers>
<DataTrigger Binding="{Binding IsWorking}" Value="True">
<DataTrigger.EnterActions>
<BeginStoryboard x:Name="SpinStoryboard">
<Storyboard TargetProperty="RenderTransform.Angle" >
<DoubleAnimation
From="0" To="360" Duration="0:0:01"
RepeatBehavior="Forever" />
</Storyboard>
</BeginStoryboard>
</DataTrigger.EnterActions>
<DataTrigger.ExitActions>
<StopStoryboard BeginStoryboardName="SpinStoryboard"></StopStoryboard>
</DataTrigger.ExitActions>
</DataTrigger>
</Style.Triggers>
</Style>
</Ellipse.Style>
</Ellipse>
</StackPanel>
</UserControl>
How do I install Python 3 on an AWS EC2 instance?
As @NickT said, there's no python3[4-6] in the default yum repos in Amazon Linux 2, as of today it uses 3.7 and looking at all answers here we can say it will be changed over time.
I was looking for python3.6 on Amazon Linux 2 but amazon-linux-extras shows a lot of options but no python at all. in fact, you can try to find the version you know in epel repo:
sudo amazon-linux-extras install epel
yum search python | grep "^python3..x8"
python34.x86_64 : Version 3 of the Python programming language aka Python 3000
python36.x86_64 : Interpreter of the Python programming language
Apache 2.4.3 (with XAMPP 1.8.1) not starting in windows 8
I had the same problem and error, I tried changing the ports for http port from 80 to 81 and ssl port from 443 to 444 but still received the same error so I reverted the ports to default and ran setup_xampp.bat which solve the problem in seconds.
path.join vs path.resolve with __dirname
Yes there is a difference between the functions but the way you are using them in this case will result in the same outcome.
path.join returns a normalized path by merging two paths together. It can return an absolute path, but it doesn't necessarily always do so.
For instance:
path.join('app/libs/oauth', '/../ssl')
resolves to app/libs/ssl
path.resolve, on the other hand, will resolve to an absolute path.
For instance, when you run:
path.resolve('bar', '/foo');
The path returned will be /foo since that is the first absolute path that can be constructed.
However, if you run:
path.resolve('/bar/bae', '/foo', 'test');
The path returned will be /foo/test again because that is the first absolute path that can be formed from right to left.
If you don't provide a path that specifies the root directory then the paths given to the resolve function are appended to the current working directory. So if your working directory was /home/mark/project/:
path.resolve('test', 'directory', '../back');
resolves to
/home/mark/project/test/back
Using __dirname is the absolute path to the directory containing the source file. When you use path.resolve or path.join they will return the same result if you give the same path following __dirname. In such cases it's really just a matter of preference.
Warning: date_format() expects parameter 1 to be DateTime
You need to pass DateTime object to this func. See manual: php
string date_format ( DateTime $object , string $format )
You can try using:
date_format (new DateTime($time), 'd-m-Y');
Or you can also use:
$date = date_create('2000-01-01');
echo date_format($date, 'Y-m-d H:i:s');
Textarea that can do syntax highlighting on the fly?
You can Highlight text in a <textarea>, using a <div> carefully placed behind it.
check out Highlight Text Inside a Textarea.
pythonw.exe or python.exe?
If you don't want a terminal window to pop up when you run your program, use pythonw.exe;
Otherwise, use python.exe
Regarding the syntax error: print is now a function in 3.x
So use instead:
print("a")
Selenium WebDriver and DropDown Boxes
Try the following:
import org.openqa.selenium.support.ui.Select;
Select droplist = new Select(driver.findElement(By.Id("selection")));
droplist.selectByVisibleText("Germany");
Get the time of a datetime using T-SQL?
Just to add that from SQL Server 2008, there is a TIME datatype so from then on you can do:
SELECT CONVERT(TIME, GETDATE())
Might be useful for those that use SQL 2008+ and find this question.
jQuery append() - return appended elements
// wrap it in jQuery, now it's a collection
var $elements = $(someHTML);
// append to the DOM
$("#myDiv").append($elements);
// do stuff, using the initial reference
$elements.effects("highlight", {}, 2000);
How to do case insensitive search in Vim
You can use in your vimrc those commands:
set ignorecase- All your searches will be case insensitiveset smartcase- Your search will be case sensitive if it contains an uppercase letter
You need to set ignorecase if you want to use what smartcase provides.
I wrote recently an article about Vim search commands (both built in command and the best plugins to search efficiently).
R - argument is of length zero in if statement
"argument is of length zero" is a very specific problem that comes from one of my least-liked elements of R. Let me demonstrate the problem:
> FALSE == "turnip"
[1] FALSE
> TRUE == "turnip"
[1] FALSE
> NA == "turnip"
[1] NA
> NULL == "turnip"
logical(0)
As you can see, comparisons to a NULL not only don't produce a boolean value, they don't produce a value at all - and control flows tend to expect that a check will produce some kind of output. When they produce a zero-length output... "argument is of length zero".
(I have a very long rant about why this infuriates me so much. It can wait.)
So, my question; what's the output of sum(is.null(data[[k]]))? If it's not 0, you have NULL values embedded in your dataset and will need to either remove the relevant rows, or change the check to
if(!is.null(data[[k]][[k2]]) & temp > data[[k]][[k2]]){
#do stuff
}
Hopefully that helps; it's hard to tell without the entire dataset. If it doesn't help, and the problem is not a NULL value getting in somewhere, I'm afraid I have no idea.
How can I get terminal output in python?
The easiest way is to use the library commands
import commands
print commands.getstatusoutput('echo "test" | wc')
How to subtract X day from a Date object in Java?
c1.set(2017, 12 , 01); //Ex: 1999 jan 20 //System.out.println("Date is : " + sdf.format(c1.getTime()));
c1.add(Calendar.MONTH, -2); // substract 1 month
System.out.println
("Date minus 1 month : "
+ sdf.format(c1.getTime()));
iPhone UIView Animation Best Practice
let's do try and checkout For Swift 3...
UIView.transition(with: mysuperview, duration: 0.75, options:UIViewAnimationOptions.transitionFlipFromRight , animations: {
myview.removeFromSuperview()
}, completion: nil)
MySQL Check if username and password matches in Database
Instead of selecting all the columns in count count(*) you can limit count for one column count(UserName).
You can limit the whole search to one row by using Limit 0,1
SELECT COUNT(UserName)
FROM TableName
WHERE UserName = 'User' AND
Password = 'Pass'
LIMIT 0, 1
Find current directory and file's directory
Answer to #1:
If you want the current directory, do this:
import os
os.getcwd()
If you want just any folder name and you have the path to that folder, do this:
def get_folder_name(folder):
'''
Returns the folder name, given a full folder path
'''
return folder.split(os.sep)[-1]
Answer to #2:
import os
print os.path.abspath(__file__)
Spring Boot application can't resolve the org.springframework.boot package
Maybe there is a problem with the JAR files in the local Maven repository. Try deleting the .m2/repository folder and hit Maven -> Update Project... another time to trigger Maven to download the dependencies again. I tried it and it worked for me.
jQuery plugin returning "Cannot read property of undefined"
Usually that problem is that in the last iteration you have an empty object or undefine object. use console.log() inside you cicle to check that this doent happend.
Sometimes a prototype in some place add an extra element.
How to have an automatic timestamp in SQLite?
If you use the SQLite DB-Browser you can change the default value in this way:
- Choose database structure
- select the table
- modify table
- in your column put under 'default value' the value: =(datetime('now','localtime'))
I recommend to make an update of your database before, because a wrong format in the value can lead to problems in the SQLLite Browser.
How to get folder path from file path with CMD
In case anyone wants an alternative method...
If it is the last subdirectory in the path, you can use this one-liner:
cd "c:\directory\subdirectory\filename.exe\..\.." && dir /ad /b /s
This would return the following:
c:\directory\subdirectory
The .... drops back to the previous directory. /ad shows only directories /b is a bare format listing /s includes all subdirectories. This is used to get the full path of the directory to print.
How to configure heroku application DNS to Godaddy Domain?
The trick is to
- create a CNAME for www.myapp.com to myapp.heroku.com
- create a 301 redirection from myapp.com to www.myapp.com
How to clear a textbox once a button is clicked in WPF?
For example:
XAML:
<Button Content="ok" Click="Button_Click"/>
<TextBlock Name="textBoxName"/>
In code:
private void Button_Click(object sender, RoutedEventArgs e)
{
textBoxName.Text = "";
}
Converting dd/mm/yyyy formatted string to Datetime
You can use "dd/MM/yyyy" format for using it in DateTime.ParseExact.
Converts the specified string representation of a date and time to its DateTime equivalent using the specified format and culture-specific format information. The format of the string representation must match the specified format exactly.
DateTime date = DateTime.ParseExact("24/01/2013", "dd/MM/yyyy", CultureInfo.InvariantCulture);
Here is a DEMO.
For more informations, check out Custom Date and Time Format Strings
Is there an easy way to convert Android Application to IPad, IPhone
I think you cannot speak of a "conversion" here. That will be a whole project. To "convert" it i think you have to write it again for the iphone.
Have a look at this question:
Is there a multiplatform framework for developing iPhone / Android applications?
As you can see from the answers there, there is no good way of developing applications for both platforms at the same time (except if you're developing games where flash makes it easy to be portable).
How to flatten only some dimensions of a numpy array
A slight generalization to Alexander's answer - np.reshape can take -1 as an argument, meaning "total array size divided by product of all other listed dimensions":
e.g. to flatten all but the last dimension:
>>> arr = numpy.zeros((50,100,25))
>>> new_arr = arr.reshape(-1, arr.shape[-1])
>>> new_arr.shape
# (5000, 25)
OpenSSL Verify return code: 20 (unable to get local issuer certificate)
I had the same problem and solved it by passing path to a directory where CA keys are stored. On Ubuntu it was:
openssl s_client -CApath /etc/ssl/certs/ -connect address.com:443
What is key=lambda
In Python, lambda is a keyword used to define anonymous functions(functions with no name) and that's why they are known as lambda functions.
Basically it is used for defining anonymous functions that can/can't take argument(s) and returns value of data/expression. Let's see an example.
>>> # Defining a lambda function that takes 2 parameters(as integer) and returns their sum
...
>>> lambda num1, num2: num1 + num2
<function <lambda> at 0x1004b5de8>
>>>
>>> # Let's store the returned value in variable & call it(1st way to call)
...
>>> addition = lambda num1, num2: num1 + num2
>>> addition(62, 5)
67
>>> addition(1700, 29)
1729
>>>
>>> # Let's call it in other way(2nd way to call, one line call )
...
>>> (lambda num1, num2: num1 + num2)(120, 1)
121
>>> (lambda num1, num2: num1 + num2)(-68, 2)
-66
>>> (lambda num1, num2: num1 + num2)(-68, 2**3)
-60
>>>
Now let me give an answer of your 2nd question. The 1st answer is also great. This is my own way to explain with another example.
Suppose we have a list of items(integers and strings with numeric contents) as follows,
nums = ["2", 1, 3, 4, "5", "8", "-1", "-10"]
and I want to sort it using sorted() function, lets see what happens.
>>> nums = ["2", 1, 3, 4, "5", "8", "-1", "-10"]
>>> sorted(nums)
[1, 3, 4, '-1', '-10', '2', '5', '8']
>>>
It didn't give me what I expected as I wanted like below,
['-10', '-1', 1, '2', 3, 4, '5', '8']
It means we need some strategy(so that sorted could treat our string items as an ints) to achieve this. This is why the key keyword argument is used. Please look at the below one.
>>> nums = ["2", 1, 3, 4, "5", "8", "-1", "-10"]
>>> sorted(nums, key=int)
['-10', '-1', 1, '2', 3, 4, '5', '8']
>>>
Lets use lambda function as a value of key
>>> names = ["Rishikesh", "aman", "Ajay", "Hemkesh", "sandeep", "Darshan", "Virendra", "Shwetabh"]
>>> names2 = sorted(names)
>>> names2
['Ajay', 'Darshan', 'Hemkesh', 'Rishikesh', 'Shwetabh', 'Virendra', 'aman', 'sandeep']
>>> # But I don't want this o/p(here our intention is to treat 'a' same as 'A')
...
>>> names3 = sorted(names, key=lambda name:name.lower())
>>> names3
['Ajay', 'aman', 'Darshan', 'Hemkesh', 'Rishikesh', 'sandeep', 'Shwetabh', 'Virendra']
>>>
You can define your own function(callable) and provide it as value of key.
Dear programers, I have written the below code for you, just try to understand it and comment your explanation. I would be glad to see your explanation(it's simple).
>>> def validator(item):
... try:
... return int(item)
... except:
... return 0
...
>>> sorted(['gurmit', "0", 5, 2, 1, "front", -2, "great"], key=validator)
[-2, 'gurmit', '0', 'front', 'great', 1, 2, 5]
>>>
I hope it would be useful.
how to create a window with two buttons that will open a new window
You add your ActionListener twice to button. So correct your code for button2 to
JButton button2 = new JButton("hello agin2");
panel.add(button2);
button2.addActionListener (new Action2());//note the button2 here instead of button
Furthermore, perform your Swing operations on the correct thread by using EventQueue.invokeLater
What is the difference among col-lg-*, col-md-* and col-sm-* in Bootstrap?
One particular case : Before learning bootstrap grid system, make sure browser zoom is set to 100% (a hundred percent). For example : If screen resolution is (1600px x 900px) and browser zoom is 175%, then "bootstrap-ped" elements will be stacked.
HTML
<div class="container-fluid">
<div class="row">
<div class="col-lg-4">class="col-lg-4"</div>
<div class="col-lg-4">class="col-lg-4"</div>
</div>
</div>
Chrome zoom 100%
Browser 100 percent - elements placed horizontally
Chrome zoom 175%
Why doesn't java.util.Set have get(int index)?
I'm not sure if anybody has spelled it out exactly this way, but you need to understand the following:
There is no "first" element in a set.
Because, as others have said, sets have no ordering. A set is a mathematical concept that specifically does not include ordering.
Of course, your computer can't really keep a list of stuff that's not ordered in memory. It has to have some ordering. Internally it's an array or a linked list or something. But you don't really know what it is, and it doesn't really have a first element; the element that comes out "first" comes out that way by chance, and might not be first next time. Even if you took steps to "guarantee" a particular first element, it's still coming out by chance, because you just happened to get it right for one particular implementation of a Set; a different implementation might not work that way with what you did. And, in fact, you may not know the implementation you're using as well as you think you do.
People run into this ALL. THE. TIME. with RDBMS systems and don't understand. An RDBMS query returns a set of records. This is the same type of set from mathematics: an unordered collection of items, only in this case the items are records. An RDBMS query result has no guaranteed order at all unless you use the ORDER BY clause, but all the time people assume it does and then trip themselves up some day when the shape of their data or code changes slightly and triggers the query optimizer to work a different way and suddenly the results don't come out in the order they expect. These are typically the people who didn't pay attention in database class (or when reading the documentation or tutorials) when it was explained to them, up front, that query results do not have a guaranteed ordering.
Encoding an image file with base64
The first answer will print a string with prefix b'. That means your string will be like this b'your_string' To solve this issue please add the following line of code.
encoded_string= base64.b64encode(img_file.read())
print(encoded_string.decode('utf-8'))
Using FileSystemWatcher to monitor a directory
The problem was the notify filters. The program was trying to open a file that was still copying. I removed all of the notify filters except for LastWrite.
private void watch()
{
FileSystemWatcher watcher = new FileSystemWatcher();
watcher.Path = path;
watcher.NotifyFilter = NotifyFilters.LastWrite;
watcher.Filter = "*.*";
watcher.Changed += new FileSystemEventHandler(OnChanged);
watcher.EnableRaisingEvents = true;
}
What are the main differences between JWT and OAuth authentication?
Firstly, we have to differentiate JWT and OAuth. Basically, JWT is a token format. OAuth is an authorization protocol that can use JWT as a token. OAuth uses server-side and client-side storage. If you want to do real logout you must go with OAuth2. Authentication with JWT token can not logout actually. Because you don't have an Authentication Server that keeps track of tokens. If you want to provide an API to 3rd party clients, you must use OAuth2 also. OAuth2 is very flexible. JWT implementation is very easy and does not take long to implement. If your application needs this sort of flexibility, you should go with OAuth2. But if you don't need this use-case scenario, implementing OAuth2 is a waste of time.
XSRF token is always sent to the client in every response header. It does not matter if a CSRF token is sent in a JWT token or not, because the CSRF token is secured with itself. Therefore sending CSRF token in JWT is unnecessary.
Redefining the Index in a Pandas DataFrame object
If you don't want 'a' in the index
In :
col = ['a','b','c']
data = DataFrame([[1,2,3],[10,11,12],[20,21,22]],columns=col)
data
Out:
a b c
0 1 2 3
1 10 11 12
2 20 21 22
In :
data2 = data.set_index('a')
Out:
b c
a
1 2 3
10 11 12
20 21 22
In :
data2.index.name = None
Out:
b c
1 2 3
10 11 12
20 21 22
Looping through all rows in a table column, Excel-VBA
You can loop through the cells of any column in a table by knowing just its name and not its position. If the table is in sheet1 of the workbook:
Dim rngCol as Range
Dim cl as Range
Set rngCol = Sheet1.Range("TableName[ColumnName]")
For Each cl in rngCol
cl.Value = "PHEV"
Next cl
The code above will loop through the data values only, excluding the header row and the totals row. It is not necessary to specify the number of rows in the table.
Use this to find the location of any column in a table by its column name:
Dim colNum as Long
colNum = Range("TableName[Column name to search for]").Column
This returns the numeric position of a column in the table.
How do I compile C++ with Clang?
Also, for posterity -- Clang (like GCC) accepts the -x switch to set the language of the input files, for example,
$ clang -x c++ some_random_file.txt
This mailing list thread explains the difference between clang and clang++ well: Difference between clang and clang++
How to mock private method for testing using PowerMock?
i know a way ny which you can call you private function to test in mockito
@Test
public void commandEndHandlerTest() throws Exception
{
Method retryClientDetail_privateMethod =yourclass.class.getDeclaredMethod("Your_function_name",null);
retryClientDetail_privateMethod.setAccessible(true);
retryClientDetail_privateMethod.invoke(yourclass.class, null);
}
How to redirect 404 errors to a page in ExpressJS?
app.get('*',function(req,res){
res.redirect('/login');
});
Uninstalling Android ADT
I found a solution by myself after doing some research:
- Go to Eclipse home folder.
- Search for 'android' => In Windows 7 you can use search bar.
- Delete all the file related to android, which is shown in the results.
- Restart Eclipse.
- Install the ADT plugin again and Restart plugin.
Now everything works fine.
How to use ScrollView in Android?
There are two options. You can make your entire layout to be scrollable or only the TextView to be scrollable.
For the first case,
<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<TableLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:stretchColumns="1" >
<TableRow>
<ImageView
android:id="@+id/imageView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="5dip"
android:layout_marginRight="5dip"
android:layout_marginTop="10dip"
android:src="@drawable/icon"
android:tint="#55ff0000" >
</ImageView>
</TableRow>
<TableRow>
<TextView
android:id="@+id/name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="3dip"
android:text=" Name " >
</TextView>
<TextView
android:id="@+id/name1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="left"
android:text="Veer" >
</TextView>
</TableRow>
<TableRow>
<TextView
android:id="@+id/age"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="3dip"
android:text=" Age" >
</TextView>
<TextView
android:id="@+id/age1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="left"
android:text="23" >
</TextView>
</TableRow>
<TableRow>
<TextView
android:id="@+id/gender"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="3dip"
android:text=" Gender" >
</TextView>
<TextView
android:id="@+id/gender1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="left"
android:text="Male" >
</TextView>
</TableRow>
<TableRow>
<TextView
android:id="@+id/profession"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="3dip"
android:text=" Professsion" >
</TextView>
<TextView
android:id="@+id/profession1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="left"
android:text="Mobile Developer" >
</TextView>
</TableRow>
<TableRow>
<TextView
android:id="@+id/phone"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="3dip"
android:text=" Phone" >
</TextView>
<TextView
android:id="@+id/phone1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="left"
android:text="03333736767" >
</TextView>
</TableRow>
<TableRow>
<TextView
android:id="@+id/email"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="3dip"
android:text=" Email" >
</TextView>
<TextView
android:id="@+id/email1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="left"
android:text="[email protected]" >
</TextView>
</TableRow>
<TableRow>
<TextView
android:id="@+id/hobby"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="3dip"
android:text=" Hobby" >
</TextView>
<TextView
android:id="@+id/hobby1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="left"
android:text="Play Games" >
</TextView>
</TableRow>
<TableRow>
<TextView
android:id="@+id/ilike"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="3dip"
android:text=" I like" >
</TextView>
<TextView
android:id="@+id/ilike1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="left"
android:text="Java, Objective-c" >
</TextView>
</TableRow>
<TableRow>
<TextView
android:id="@+id/idislike"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="3dip"
android:text=" I dislike" >
</TextView>
<TextView
android:id="@+id/idislike1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="left"
android:text="Microsoft" >
</TextView>
</TableRow>
<TableRow>
<TextView
android:id="@+id/address"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="3dip"
android:text=" Address" >
</TextView>
<TextView
android:id="@+id/address1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="left"
android:text="Johar Mor" >
</TextView>
</TableRow>
<Relativelayout>
</Relativelayout>
</TableLayout>
</RelativeLayout>
</ScrollView>
or, as I said you can use scrollView for TextView alone.
How should I remove all the leading spaces from a string? - swift
string = string.filter ({!" ".contains($0) })
How to get span tag inside a div in jQuery and assign a text?
Try this
$("#message span").text("hello world!");
function Errormessage(txt) {
var elem = $("#message");
elem.fadeIn("slow");
// find the span inside the div and assign a text
elem.children("span").text("your text");
elem.children("a.close-notify").click(function() {
elem.fadeOut("slow");
});
}
Alert handling in Selenium WebDriver (selenium 2) with Java
You could try
try{
if(webDriver.switchTo().alert() != null){
Alert alert = webDriver.switchTo().alert();
alert.getText();
//etc.
}
}catch(Exception e){}
If that doesn't work, you could try looping through all the window handles and see if the alert exists. I'm not sure if the alert opens as a new window using selenium.
for(String s: webDriver.getWindowHandles()){
//see if alert exists here.
}
How do I make a splash screen?
Splash screens should not be loaded from a layout file, there might still be some lag when loading it.
The best way is to create a Theme just for your SplashScreenActivity and set the android:windowBackground to a drawable ressource.
https://www.bignerdranch.com/blog/splash-screens-the-right-way/
In a nutshell:
Declare your SplashScreenActivity in the manifest:
<activity
android:name=".activities.SplashScreenActivity"
android:theme="@style/SplashTheme"
android:screenOrientation="portrait">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
In your SplashScreenActivity.java:
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Intent intent = new Intent(this, MainActivity_.class);
startActivity(intent);
finish();
}
Next create the ressource for the background window of your theme:
<style name="SplashTheme" parent="Theme.Bumpfie.Base">
<item name="android:windowBackground">@drawable/splash</item>
</style>
Drawable file splash.xml:
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="@android:color/white"/>
<item>
<bitmap
android:gravity="center"
android:src="@drawable/app_logo"/>
</item>
</layer-list>
How to get subarray from array?
Take a look at Array.slice(begin, end)
const ar = [1, 2, 3, 4, 5];
// slice from 1..3 - add 1 as the end index is not included
const ar2 = ar.slice(1, 3 + 1);
console.log(ar2);Jackson JSON: get node name from json-tree
fields() and fieldNames() both were not working for me. And I had to spend quite sometime to find a way to iterate over the keys. There are two ways by which it can be done.
One is by converting it into a map (takes up more space):
ObjectMapper mapper = new ObjectMapper();
Map<String, Object> result = mapper.convertValue(jsonNode, Map.class);
for (String key : result.keySet())
{
if(key.equals(foo))
{
//code here
}
}
Another, by using a String iterator:
Iterator<String> it = jsonNode.getFieldNames();
while (it.hasNext())
{
String key = it.next();
if (key.equals(foo))
{
//code here
}
}
C: What is the difference between ++i and i++?
The only difference is the order of operations between the increment of the variable and the value the operator returns.
This code and its output explains the the difference:
#include<stdio.h>
int main(int argc, char* argv[])
{
unsigned int i=0, a;
printf("i initial value: %d; ", i);
a = i++;
printf("value returned by i++: %d, i after: %d\n", a, i);
i=0;
printf("i initial value: %d; ", i);
a = ++i;
printf(" value returned by ++i: %d, i after: %d\n",a, i);
}
The output is:
i initial value: 0; value returned by i++: 0, i after: 1
i initial value: 0; value returned by ++i: 1, i after: 1
So basically ++i returns the value after it is incremented, while i++ return the value before it is incremented. At the end, in both cases the i will have its value incremented.
Another example:
#include<stdio.h>
int main ()
int i=0;
int a = i++*2;
printf("i=0, i++*2=%d\n", a);
i=0;
a = ++i * 2;
printf("i=0, ++i*2=%d\n", a);
i=0;
a = (++i) * 2;
printf("i=0, (++i)*2=%d\n", a);
i=0;
a = (++i) * 2;
printf("i=0, (++i)*2=%d\n", a);
return 0;
}
Output:
i=0, i++*2=0
i=0, ++i*2=2
i=0, (++i)*2=2
i=0, (++i)*2=2
Many times there is no difference
Differences are clear when the returned value is assigned to another variable or when the increment is performed in concatenation with other operations where operations precedence is applied (i++*2 is different from ++i*2, but (i++)*2 and (++i)*2 returns the same value) in many cases they are interchangeable. A classical example is the for loop syntax:
for(int i=0; i<10; i++)
has the same effect of
for(int i=0; i<10; ++i)
Rule to remember
To not make any confusion between the two operators I adopted this rule:
Associate the position of the operator ++ with respect to the variable i to the order of the ++ operation with respect to the assignment
Said in other words:
++beforeimeans incrementation must be carried out before assignment;++afterimeans incrementation must be carried out after assignment:
What is the difference between DAO and Repository patterns?
OK, think I can explain better what I've put in comments :). So, basically, you can see both those as the same, though DAO is a more flexible pattern than Repository. If you want to use both, you would use the Repository in your DAO-s. I'll explain each of them below:
REPOSITORY:
It's a repository of a specific type of objects - it allows you to search for a specific type of objects as well as store them. Usually it will ONLY handle one type of objects. E.g. AppleRepository would allow you to do AppleRepository.findAll(criteria) or AppleRepository.save(juicyApple).
Note that the Repository is using Domain Model terms (not DB terms - nothing related to how data is persisted anywhere).
A repository will most likely store all data in the same table, whereas the pattern doesn't require that. The fact that it only handles one type of data though, makes it logically connected to one main table (if used for DB persistence).
DAO - data access object (in other words - object used to access data)
A DAO is a class that locates data for you (it is mostly a finder, but it's commonly used to also store the data). The pattern doesn't restrict you to store data of the same type, thus you can easily have a DAO that locates/stores related objects.
E.g. you can easily have UserDao that exposes methods like
Collection<Permission> findPermissionsForUser(String userId)
User findUser(String userId)
Collection<User> findUsersForPermission(Permission permission)
All those are related to User (and security) and can be specified under then same DAO. This is not the case for Repository.
Finally
Note that both patterns really mean the same (they store data and they abstract the access to it and they are both expressed closer to the domain model and hardly contain any DB reference), but the way they are used can be slightly different, DAO being a bit more flexible/generic, while Repository is a bit more specific and restrictive to a type only.
What are enums and why are they useful?
Apart from all said by others.. In an older project that I used to work for, a lot of communication between entities(independent applications) was using integers which represented a small set. It was useful to declare the set as enum with static methods to get enum object from value and viceversa. The code looked cleaner, switch case usability and easier writing to logs.
enum ProtocolType {
TCP_IP (1, "Transmission Control Protocol"),
IP (2, "Internet Protocol"),
UDP (3, "User Datagram Protocol");
public int code;
public String name;
private ProtocolType(int code, String name) {
this.code = code;
this.name = name;
}
public static ProtocolType fromInt(int code) {
switch(code) {
case 1:
return TCP_IP;
case 2:
return IP;
case 3:
return UDP;
}
// we had some exception handling for this
// as the contract for these was between 2 independent applications
// liable to change between versions (mostly adding new stuff)
// but keeping it simple here.
return null;
}
}
Create enum object from received values (e.g. 1,2) using ProtocolType.fromInt(2)
Write to logs using myEnumObj.name
Hope this helps.
Is there a bash command which counts files?
Lots of answers here, but some don't take into account
- file names with spaces, newlines, or control characters in them
- file names that start with hyphens (imagine a file called
-l) - hidden files, that start with a dot (if the glob was
*.loginstead oflog* - directories that match the glob (e.g. a directory called
logsthat matcheslog*) - empty directories (i.e. the result is 0)
- extremely large directories (listing them all could exhaust memory)
Here's a solution that handles all of them:
ls 2>/dev/null -Ubad1 -- log* | wc -l
Explanation:
-Ucauseslsto not sort the entries, meaning it doesn't need to load the entire directory listing in memory-bprints C-style escapes for nongraphic characters, crucially causing newlines to be printed as\n.-aprints out all files, even hidden files (not strictly needed when the globlog*implies no hidden files)-dprints out directories without attempting to list the contents of the directory, which is whatlsnormally would do-1makes sure that it's on one column (ls does this automatically when writing to a pipe, so it's not strictly necessary)2>/dev/nullredirects stderr so that if there are 0 log files, ignore the error message. (Note thatshopt -s nullglobwould causelsto list the entire working directory instead.)wc -lconsumes the directory listing as it's being generated, so the output oflsis never in memory at any point in time.--File names are separated from the command using--so as not to be understood as arguments tols(in caselog*is removed)
The shell will expand log* to the full list of files, which may exhaust memory if it's a lot of files, so then running it through grep is be better:
ls -Uba1 | grep ^log | wc -l
This last one handles extremely large directories of files without using a lot of memory (albeit it does use a subshell). The -d is no longer necessary, because it's only listing the contents of the current directory.
Parse JSON from HttpURLConnection object
Define the following function (not mine, not sure where I found it long ago):
private static String convertStreamToString(InputStream is) {
BufferedReader reader = new BufferedReader(new InputStreamReader(is));
StringBuilder sb = new StringBuilder();
String line = null;
try {
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
is.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return sb.toString();
}
Then:
String jsonReply;
if(conn.getResponseCode()==201 || conn.getResponseCode()==200)
{
success = true;
InputStream response = conn.getInputStream();
jsonReply = convertStreamToString(response);
// Do JSON handling here....
}
JavaScript/jQuery - "$ is not defined- $function()" error
Try:
(function($) {
$(function() {
$('.update').live('change', function() {
formObject.run($(this));
});
});
})(jQuery);
By using this way you ensure the global variable jQuery will be bound to the "$" inside the closure. Just make sure jQuery is properly loaded into the page by inserting:
<script type="text/javascript" src="http://code.jquery.com/jquery-1.7.1.min.js"></script>
Replace "http://code.jquery.com/jquery-1.7.1.min.js" to the path where your jQuery source is located within the page context.
Convert a 1D array to a 2D array in numpy
You want to reshape the array.
B = np.reshape(A, (-1, 2))
where -1 infers the size of the new dimension from the size of the input array.
Getting file size in Python?
Try
os.path.getsize(filename)
It should return the size of a file, reported by os.stat().
How to use Git?
If you wish to update several git repositories in one command - i suggest that you read a little bit on repo.
About updating the repository, you can do it by:
git fetch
git rebase origin/master
OR
git pull --rebase
For more information about using GIT you can take a look on my GIT beginners guide
How to scroll to an element?
You can use something like componentDidUpdate
componentDidUpdate() {
var elem = testNode //your ref to the element say testNode in your case;
elem.scrollTop = elem.scrollHeight;
};
Python initializing a list of lists
The problem is that they're all the same exact list in memory. When you use the [x]*n syntax, what you get is a list of n many x objects, but they're all references to the same object. They're not distinct instances, rather, just n references to the same instance.
To make a list of 3 different lists, do this:
x = [[] for i in range(3)]
This gives you 3 separate instances of [], which is what you want
[[]]*n is similar to
l = []
x = []
for i in range(n):
x.append(l)
While [[] for i in range(3)] is similar to:
x = []
for i in range(n):
x.append([]) # appending a new list!
In [20]: x = [[]] * 4
In [21]: [id(i) for i in x]
Out[21]: [164363948, 164363948, 164363948, 164363948] # same id()'s for each list,i.e same object
In [22]: x=[[] for i in range(4)]
In [23]: [id(i) for i in x]
Out[23]: [164382060, 164364140, 164363628, 164381292] #different id(), i.e unique objects this time
HTTP Error 404 when running Tomcat from Eclipse
It is because there is no default ROOT web application. When you create some web app and deploy it to Tomcat using Eclipse, then you will be able to access it with the URL in the form of
http://localhost:8080/YourWebAppName
where YourWebAppName is some name you give to your web app (the so called application context path).
Quote from Jetty Documentation Wiki (emphasis mine):
The context path is the prefix of a URL path that is used to select the web application to which an incoming request is routed. Typically a URL in a Java servlet server is of the format
http://hostname.com/contextPath/servletPath/pathInfo, where each of the path elements may be zero or more / separated elements. If there is no context path, the context is referred to as the root context.
If you still want the default app which is accessed with the URL of the form
http://localhost:8080
or if you change the default 8080 port to 80, then just
http://localhost
i.e. without application context path read the following (quote from Tutorial: Installing Tomcat 7 and Using it with Eclipse, emphasis mine):
Copy the ROOT (default) Web app into Eclipse. Eclipse forgets to copy the default apps (ROOT, examples, docs, etc.) when it creates a Tomcat folder inside the Eclipse workspace. Go to C:\apache-tomcat-7.0.34\webapps and copy the ROOT folder. Then go to your Eclipse workspace, go to the .metadata folder, and search for "wtpwebapps". You should find something like
C:\your-eclipse-workspace-location\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\wtpwebapps(or.../tmp1/wtpwebappsif you already had another server registered in Eclipse). Go to thewtpwebappsfolder and paste ROOT (say "yes" if asked if you want to merge/replace folders/files). Then reloadhttp://localhost/to see the Tomcat welcome page.
How to update only one field using Entity Framework?
Ladislav's answer updated to use DbContext (introduced in EF 4.1):
public void ChangePassword(int userId, string password)
{
var user = new User() { Id = userId, Password = password };
using (var db = new MyEfContextName())
{
db.Users.Attach(user);
db.Entry(user).Property(x => x.Password).IsModified = true;
db.SaveChanges();
}
}
gpg: no valid OpenPGP data found
Managed to resolve it. separated the command in to two commands and used directly the file name which was downloaded example -
wget -q -O - https://pkg.jenkins.io/debian/jenkins-ci.org.key | sudo apt-key add -
can be separated into
wget -q -O - https://pkg.jenkins.io/debian/jenkins-ci.org.keysudo apt-key add jenkins-ci.org.key
Mongoose delete array element in document and save
Answers above are shown how to remove an array and here is how to pull an object from an array.
Reference: https://docs.mongodb.com/manual/reference/operator/update/pull/
db.survey.update( // select your doc in moongo
{ }, // your query, usually match by _id
{ $pull: { results: { $elemMatch: { score: 8 , item: "B" } } } }, // item(s) to match from array you want to pull/remove
{ multi: true } // set this to true if you want to remove multiple elements.
)
How to add plus one (+1) to a SQL Server column in a SQL Query
You need both a value and a field to assign it to. The value is TableField + 1, so the assignment is:
SET TableField = TableField + 1
How to get raw text from pdf file using java
Extracting all keywords from PDF(from a web page) file on your local machine or Base64 encoded string:
import org.apache.commons.codec.binary.Base64;
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.text.PDFTextStripper;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
public class WebPagePdfExtractor {
public static void main(String arg[]) {
WebPagePdfExtractor webPagePdfExtractor = new WebPagePdfExtractor();
System.out.println("From file: " + webPagePdfExtractor.processRecord(createByteArray()).get("text"));
System.out.println("From string: " + webPagePdfExtractor.processRecord(getArrayFromBase64EncodedString()).get("text"));
}
public Map<String, Object> processRecord(byte[] byteArray) {
Map<String, Object> map = new HashMap<>();
try {
PDFTextStripper stripper = new PDFTextStripper();
stripper.setSortByPosition(false);
stripper.setShouldSeparateByBeads(true);
PDDocument document = PDDocument.load(byteArray);
String text = stripper.getText(document);
map.put("text", text.replaceAll("\n|\r|\t", " "));
} catch (Exception exception) {
exception.printStackTrace();
}
return map;
}
private static byte[] getArrayFromBase64EncodedString() {
String encodedContent = "data:application/pdf;base64,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" +
"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" +
"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" +
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String content = encodedContent.substring("data:application/pdf;base64," .length());
return Base64.decodeBase64(content);
}
public static byte[] createByteArray() {
String pathToBinaryData = "/bla-bla/src/main/resources/small.pdf";
File file = new File(pathToBinaryData);
if (!file.exists()) {
System.out.println(" could not be found in folder " + pathToBinaryData);
return null;
}
FileInputStream fin = null;
try {
fin = new FileInputStream(file);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
byte fileContent[] = new byte[(int) file.length()];
try {
fin.read(fileContent);
} catch (IOException e) {
e.printStackTrace();
}
return fileContent;
}
}
Android emulator not able to access the internet
I had the same problem on Windows 10. I just went to the Network & internet settings> Change adapter options> right-click on Wi-Fi and chose properties> Chose Internet protocol version 4 in the list and clicked properties> Turned on the "Use the following DNS server addresses" and filled the first part with "8.8.8.8" address.
Problem solved!
How do I remove objects from a JavaScript associative array?
Objects in JavaScript can be thought of as associative arrays, mapping keys (properties) to values.
To remove a property from an object in JavaScript you use the delete operator:
const o = { lastName: 'foo' }
o.hasOwnProperty('lastName') // true
delete o['lastName']
o.hasOwnProperty('lastName') // false
Note that when delete is applied to an index property of an Array, you will create a sparsely populated array (ie. an array with a missing index).
When working with instances of Array, if you do not want to create a sparsely populated array - and you usually don't - then you should use Array#splice or Array#pop.
Note that the delete operator in JavaScript does not directly free memory. Its purpose is to remove properties from objects. Of course, if a property being deleted holds the only remaining reference to an object o, then o will subsequently be garbage collected in the normal way.
Using the delete operator can affect JavaScript engines' ability to optimise code.
QLabel: set color of text and background
The best way to set any feature regarding the colors of any widget is to use QPalette.
And the easiest way to find what you are looking for is to open Qt Designer and set the palette of a QLabel and check the generated code.
How to select multiple files with <input type="file">?
You can do it now with HTML5
In essence you use the multiple attribute on the file input.
<input type='file' multiple>
How to turn a vector into a matrix in R?
A matrix is really just a vector with a dim attribute (for the dimensions). So you can add dimensions to vec using the dim() function and vec will then be a matrix:
vec <- 1:49
dim(vec) <- c(7, 7) ## (rows, cols)
vec
> vec <- 1:49
> dim(vec) <- c(7, 7) ## (rows, cols)
> vec
[,1] [,2] [,3] [,4] [,5] [,6] [,7]
[1,] 1 8 15 22 29 36 43
[2,] 2 9 16 23 30 37 44
[3,] 3 10 17 24 31 38 45
[4,] 4 11 18 25 32 39 46
[5,] 5 12 19 26 33 40 47
[6,] 6 13 20 27 34 41 48
[7,] 7 14 21 28 35 42 49
Adding up BigDecimals using Streams
Use this approach to sum the list of BigDecimal:
List<BigDecimal> values = ... // List of BigDecimal objects
BigDecimal sum = values.stream().reduce((x, y) -> x.add(y)).get();
This approach maps each BigDecimal as a BigDecimal only and reduces them by summing them, which is then returned using the get() method.
Here's another simple way to do the same summing:
List<BigDecimal> values = ... // List of BigDecimal objects
BigDecimal sum = values.stream().reduce(BigDecimal::add).get();
Update
If I were to write the class and lambda expression in the edited question, I would have written it as follows:
import java.math.BigDecimal;
import java.util.LinkedList;
public class Demo
{
public static void main(String[] args)
{
LinkedList<Invoice> invoices = new LinkedList<>();
invoices.add(new Invoice("C1", "I-001", BigDecimal.valueOf(.1), BigDecimal.valueOf(10)));
invoices.add(new Invoice("C2", "I-002", BigDecimal.valueOf(.7), BigDecimal.valueOf(13)));
invoices.add(new Invoice("C3", "I-003", BigDecimal.valueOf(2.3), BigDecimal.valueOf(8)));
invoices.add(new Invoice("C4", "I-004", BigDecimal.valueOf(1.2), BigDecimal.valueOf(7)));
// Java 8 approach, using Method Reference for mapping purposes.
invoices.stream().map(Invoice::total).forEach(System.out::println);
System.out.println("Sum = " + invoices.stream().map(Invoice::total).reduce((x, y) -> x.add(y)).get());
}
// This is just my style of writing classes. Yours can differ.
static class Invoice
{
private String company;
private String number;
private BigDecimal unitPrice;
private BigDecimal quantity;
public Invoice()
{
unitPrice = quantity = BigDecimal.ZERO;
}
public Invoice(String company, String number, BigDecimal unitPrice, BigDecimal quantity)
{
setCompany(company);
setNumber(number);
setUnitPrice(unitPrice);
setQuantity(quantity);
}
public BigDecimal total()
{
return unitPrice.multiply(quantity);
}
public String getCompany()
{
return company;
}
public void setCompany(String company)
{
this.company = company;
}
public String getNumber()
{
return number;
}
public void setNumber(String number)
{
this.number = number;
}
public BigDecimal getUnitPrice()
{
return unitPrice;
}
public void setUnitPrice(BigDecimal unitPrice)
{
this.unitPrice = unitPrice;
}
public BigDecimal getQuantity()
{
return quantity;
}
public void setQuantity(BigDecimal quantity)
{
this.quantity = quantity;
}
}
}
Find and replace words/lines in a file
Any decent text editor has a search&replace facility that supports regular expressions.
If however, you have reason to reinvent the wheel in Java, you can do:
Path path = Paths.get("test.txt");
Charset charset = StandardCharsets.UTF_8;
String content = new String(Files.readAllBytes(path), charset);
content = content.replaceAll("foo", "bar");
Files.write(path, content.getBytes(charset));
This only works for Java 7 or newer. If you are stuck on an older Java, you can do:
String content = IOUtils.toString(new FileInputStream(myfile), myencoding);
content = content.replaceAll(myPattern, myReplacement);
IOUtils.write(content, new FileOutputStream(myfile), myencoding);
In this case, you'll need to add error handling and close the streams after you are done with them.
IOUtils is documented at http://commons.apache.org/proper/commons-io/javadocs/api-release/org/apache/commons/io/IOUtils.html
How to change default Anaconda python environment
Change permanent
conda install python={version}
Change Temporarily
View your environments
run conda info --envs on your terminal window or an Anconda Prompt
If It doesn't show environment that you want to install
run conda create -n py36 python=3.6 anaconda for python 3.6 change version as your prefer
Activating an environment (use Anaconda prompt)
run activate envnme envnme you can find by this commandconda info --envs as a example when you run conda info --envs it show
base * C:\Users\DulangaHeshan\Anaconda3
py36 C:\Users\DulangaHeshan\Anaconda3\envs\py36
then run activate py36
to check run python --version
In Windows, it is good practice to deactivate one environment before activating another. https://docs.conda.io/projects/conda/en/latest/user-guide/tasks/manage-environments.html?highlight=deactivate%20environment
Printing a java map Map<String, Object> - How?
There is a get method in HashMap:
for (String keys : objectSet.keySet())
{
System.out.println(keys + ":"+ objectSet.get(keys));
}
How do I check if I'm running on Windows in Python?
You should be able to rely on os.name.
import os
if os.name == 'nt':
# ...
edit: Now I'd say the clearest way to do this is via the platform module, as per the other answer.
Java, how to compare Strings with String Arrays
If I understand your question correctly, it appears you want to know the following:
How do I check if my
Stringarray containsusercode, theStringthat was just inputted?
See here for a similar question. It quotes solutions that have been pointed out by previous answers. I hope this helps.
How do I find an element that contains specific text in Selenium WebDriver (Python)?
Interestingly virtually all answers revolve around XPath's function contains(), neglecting the fact it is case sensitive - contrary to the OP's ask.
If you need case insensitivity, that is achievable in XPath 1.0 (the version contemporary browsers support), though it's not pretty - by using the translate() function. It substitutes a source character to its desired form, by using a translation table.
Constructing a table of all upper case characters will effectively transform the node's text to its lower() form - allowing case-insensitive matching (here's just the prerogative):
[
contains(
translate(text(), 'ABCDEFGHIJKLMNOPQRSTUVWXYZ', 'abcdefghijklmnopqrstuvwxyz'),
'my button'
)
]
# will match a source text like "mY bUTTon"
The full Python call:
driver.find_elements_by_xpath("//*[contains(translate(text(), 'ABCDEFGHIJKLMNOPQRSTUVWXYZ?', 'abcdefghijklmnopqrstuvwxyz?'), 'my button')]")
Naturally this approach has its drawbacks - as given, it'll work only for Latin text; if you want to cover Unicode characters - you'll have to add them to the translation table. I've done that in the sample above - the last character is the Cyrillic symbol "?".
And if we lived in a world where browsers supported XPath 2.0 and up (, but not happening any time soon ??), we could having used the functions lower-case() (yet, not fully locale-aware), and matches (for regex searches, with the case-insensitive ('i') flag).
Difference between PACKETS and FRAMES
Actually, there are five words commonly used when we talk about layers of reference models (or protocol stacks): data, segment, packet, frame and bit. And the term PDU (Protocol Data Unit) is used to refer to the packets in different layers of the OSI model. Thus PDU gives an abstract idea of the data packets. The PDU has a different meaning in different layers still we can use it as a common term.
When we come to your question, we can call all of them by using the general term PDU, but if you want to call them specifically at a given layer:
- Data: PDU of Application, Presentation and Session Layers
- Segment: PDU of Transport Layer
- Packet: PDU of network Layer
- Frame: PDU of data-link Layer
- Bit: PDU of physical Layer
Here is a diagram, since a picture is worth a thousand words:
SQL query for today's date minus two months
Would something like this work for you?
SELECT * FROM FB WHERE Dte >= DATE(NOW() - INTERVAL 2 MONTH);
Check if an element is present in an array
Just use indexOf:
haystack.indexOf(needle) >= 0
If you want to support old Internet Explorers (< IE9), you'll have to include your current code as a workaround though.
Unless your list is sorted, you need to compare every value to the needle. Therefore, both your solution and indexOf will have to execute n/2 comparisons on average. However, since indexOf is a built-in method, it may use additional optimizations and will be slightly faster in practice. Note that unless your application searches in lists extremely often (say a 1000 times per second) or the lists are huge (say 100k entries), the speed difference will not matter.
How do I properly clean up Excel interop objects?
I found a useful generic template that can help implement the correct disposal pattern for COM objects, that need Marshal.ReleaseComObject called when they go out of scope:
Usage:
using (AutoReleaseComObject<Application> excelApplicationWrapper = new AutoReleaseComObject<Application>(new Application()))
{
try
{
using (AutoReleaseComObject<Workbook> workbookWrapper = new AutoReleaseComObject<Workbook>(excelApplicationWrapper.ComObject.Workbooks.Open(namedRangeBase.FullName, false, false, missing, missing, missing, true, missing, missing, true, missing, missing, missing, missing, missing)))
{
// do something with your workbook....
}
}
finally
{
excelApplicationWrapper.ComObject.Quit();
}
}
Template:
public class AutoReleaseComObject<T> : IDisposable
{
private T m_comObject;
private bool m_armed = true;
private bool m_disposed = false;
public AutoReleaseComObject(T comObject)
{
Debug.Assert(comObject != null);
m_comObject = comObject;
}
#if DEBUG
~AutoReleaseComObject()
{
// We should have been disposed using Dispose().
Debug.WriteLine("Finalize being called, should have been disposed");
if (this.ComObject != null)
{
Debug.WriteLine(string.Format("ComObject was not null:{0}, name:{1}.", this.ComObject, this.ComObjectName));
}
//Debug.Assert(false);
}
#endif
public T ComObject
{
get
{
Debug.Assert(!m_disposed);
return m_comObject;
}
}
private string ComObjectName
{
get
{
if(this.ComObject is Microsoft.Office.Interop.Excel.Workbook)
{
return ((Microsoft.Office.Interop.Excel.Workbook)this.ComObject).Name;
}
return null;
}
}
public void Disarm()
{
Debug.Assert(!m_disposed);
m_armed = false;
}
#region IDisposable Members
public void Dispose()
{
Dispose(true);
#if DEBUG
GC.SuppressFinalize(this);
#endif
}
#endregion
protected virtual void Dispose(bool disposing)
{
if (!m_disposed)
{
if (m_armed)
{
int refcnt = 0;
do
{
refcnt = System.Runtime.InteropServices.Marshal.ReleaseComObject(m_comObject);
} while (refcnt > 0);
m_comObject = default(T);
}
m_disposed = true;
}
}
}
Reference:
http://www.deez.info/sengelha/2005/02/11/useful-idisposable-class-3-autoreleasecomobject/
How can an html element fill out 100% of the remaining screen height, using css only?
The accepted answer does not work. And the highest voted answer does not answer the actual question. With a fixed pixel height header, and a filler in the remaining display of the browser, and scroll for owerflow. Here is a solution that actually works, using absolute positioning. I also assume that the height of the header is known, by the sound of "fixed header" in the question. I use 150px as an example here:
HTML:
<html>
<body>
<div id="Header">
</div>
<div id="Content">
</div>
</body>
</html>
CSS:(adding background-color for visual effect only)
#Header
{
height: 150px;
width: 100%;
background-color: #ddd;
}
#Content
{
position: absolute;
width: 100%;
top: 150px;
bottom: 0;
background-color: #aaa;
overflow-y: scroll;
}
For a more detailed look how this works, with actual content inside the #Content, have a look at this jsfiddle, using bootstrap rows and columns.
Why is json_encode adding backslashes?
I had a very similar problem, I had an array ready to be posted. in my post function I had this:
json = JSON.stringfy(json);
the detail here is that I'm using blade inside laravel to build a three view form, so I can go back and forward, I have in between every back and forward button validations and when I go back in the form without reloading the page my json get filled by backslashes. I console.log(json) in every validation and realized that the json was treated as a string instead of an object.
In conclution i shouldn't have assinged json = JSON.stringfy(json) instead i assigned it to another variable.
var aux = JSON.stringfy(json);
This way i keep json as an object, and not a string.
Create an ISO date object in javascript
Try using the ISO string
var isodate = new Date().toISOString()
See also: method definition at MDN.
How to "crop" a rectangular image into a square with CSS?
If the image is in a container with a responsive width:
HTML
<div class="img-container">
<img src="" alt="">
</div>
CSS
.img-container {
position: relative;
&::after {
content: "";
display: block;
padding-bottom: 100%;
}
img {
position: absolute;
width: 100%;
height: 100%;
object-fit: cover;
}
}
Finding repeated words on a string and counting the repetitions
Using java8
private static void findWords(String s, List<String> output, List<Integer> count){
String[] words = s.split(", ");
Map<String, Integer> map = new LinkedHashMap<>();
Arrays.stream(words).forEach(e->map.put(e, map.getOrDefault(e, 0) + 1));
map.forEach((k,v)->{
output.add(k);
count.add(v);
});
}
Also, use a LinkedHashMap if you want to preserve the order of insertion
private static void findWords(){
String s = "House, House, House, Dog, Dog, Dog, Dog";
List<String> output = new ArrayList<>();
List<Integer> count = new ArrayList<>();
findWords(s, output, count);
System.out.println(output);
System.out.println(count);
}
Output
[House, Dog]
[3, 4]
How to convert std::string to LPCWSTR in C++ (Unicode)
string myMessage="helloworld";
int len;
int slength = (int)myMessage.length() + 1;
len = MultiByteToWideChar(CP_ACP, 0, myMessage.c_str(), slength, 0, 0);
wchar_t* buf = new wchar_t[len];
MultiByteToWideChar(CP_ACP, 0, myMessage.c_str(), slength, buf, len);
std::wstring r(buf);
std::wstring stemp = r.C_str();
LPCWSTR result = stemp.c_str();
Use of min and max functions in C++
Use std::min and std::max.
If the other versions are faster then your implementation can add overloads for these and you'll get the benefit of performance and portability:
template <typename T>
T min (T, T) {
// ... default
}
inline float min (float f1, float f2) {
return fmin( f1, f2);
}
Difference between @Mock and @InjectMocks
@Mock is used to declare/mock the references of the dependent beans, while @InjectMocks is used to mock the bean for which test is being created.
For example:
public class A{
public class B b;
public void doSomething(){
}
}
test for class A:
public class TestClassA{
@Mocks
public class B b;
@InjectMocks
public class A a;
@Test
public testDoSomething(){
}
}
Can two or more people edit an Excel document at the same time?
No, sadly:
The Excel 2010 client application does not support co-authoring workbooks in SharePoint Server 2010. However, the Excel client application does support non-real-time co-authoring workbooks stored locally or on network (UNC) paths by using the Shared Workbook feature. Co-authoring workbooks in SharePoint is supported by using the Microsoft Excel Web App, included with Office Web Apps
From Co-authoring overview (SharePoint Server 2010)
...and not for SharePoint 2013 either. Though it works for pretty much all other Office documents. Go figure.
Session TimeOut in web.xml
If you don't want a timeout happening for some purpose:
<session-config>
<session-timeout>0</session-timeout>
</session-config>
Should result in no timeout at all -> infinite
Why can't I display a pound (£) symbol in HTML?
1st: the pound symbol is a "special" char in utf8 encoding (try saving £$ in a iso-8859-1 (or iso-8859-15) file and you will get ä when encoding using header)
2nd: change your encoding to utf8 form the file. there are plenty of methods to do it. notepad and notepad++ are great sugestions.
3rd: use ob_start(); (in php) BEFORE YOU MAKE ANY OUTPUT if you are getting weird encoding errors, like missing the encoding sometimes. and YES, this solves it! this kind of errors occurs when a page is encoded in windows-1252(ANSI),ASCII,iso-8859-1(5) and then you have all the others in utf8. this is a terrible error and can cause weird things like session_start(); not working.
4th: other php solutions:
utf8_encode('£');
htmlentities('£');
echo '&pound;';
5th: javascript solutions:
document.getElementById('id_goes_here').innerText.replace('£','&pound;');
document.getElementById('id_goes_here').innerText.replace('£',"\u00A3");
$(this).html().replace('£','&pound;'); //jquery
$(this).html().replace('£',"\u00A3"); //jquery
String.fromCharCode('163');
you MUST send £, so it will repair the broken encoded code point. please, avoid these solutions! use php! these solutions only show how to 'fix' the error, and the last one only to create the well-encoded char.
Date Conversion from String to sql Date in Java giving different output?
mm stands for "minutes". Use MM instead:
SimpleDateFormat sdf1 = new SimpleDateFormat("dd-MM-yyyy");
Customize list item bullets using CSS
Another way of changing the size of the bullets would be:
- Disabling the bullets altogether
- Re-adding the custom bullets with the help of
::beforepseudo-element.
Example:
ul {_x000D_
list-style-type: none;_x000D_
}_x000D_
_x000D_
li::before {_x000D_
display: inline-block;_x000D_
vertical-align: middle;_x000D_
width: 5px;_x000D_
height: 5px;_x000D_
background-color: #000000;_x000D_
margin-right: 8px;_x000D_
content: ' '_x000D_
}<ul>_x000D_
<li>first element</li>_x000D_
<li>second element</li>_x000D_
</ul>No markup changes needed
Setting a global PowerShell variable from a function where the global variable name is a variable passed to the function
You can use the Set-Variable cmdlet. Passing $global:var3 sends the value of $var3, which is not what you want. You want to send the name.
$global:var1 = $null
function foo ($a, $b, $varName)
{
Set-Variable -Name $varName -Value ($a + $b) -Scope Global
}
foo 1 2 var1
This is not very good programming practice, though. Below would be much more straightforward, and less likely to introduce bugs later:
$global:var1 = $null
function ComputeNewValue ($a, $b)
{
$a + $b
}
$global:var1 = ComputeNewValue 1 2
auto run a bat script in windows 7 at login
To run the batch file when the VM user logs in:
Drag the shortcut--the one that's currently on your desktop--(or the batch file itself) to Start - All Programs - Startup. Now when you login as that user, it will launch the batch file.
Another way to do the same thing is to save the shortcut or the batch file in %AppData%\Microsoft\Windows\Start Menu\Programs\Startup\.
As far as getting it to run full screen, it depends a bit what you mean. You can have it launch maximized by editing your batch file like this:
start "" /max "C:\Program Files\Oracle\VirtualBox\VirtualBox.exe" --comment "VM" --startvm "12dada4d-9cfd-4aa7-8353-20b4e455b3fa"
But if VirtualBox has a truly full-screen mode (where it hides even the taskbar), you'll have to look for a command-line parameter on VirtualBox.exe. I'm not familiar with that product.
Why is using "for...in" for array iteration a bad idea?
The problem with for ... in ... — and this only becomes a problem when a programmer doesn't really understand the language; it's not really a bug or anything — is that it iterates over all members of an object (well, all enumerable members, but that's a detail for now). When you want to iterate over just the indexed properties of an array, the only guaranteed way to keep things semantically consistent is to use an integer index (that is, a for (var i = 0; i < array.length; ++i) style loop).
Any object can have arbitrary properties associated with it. There would be nothing terrible about loading additional properties onto an array instance, in particular. Code that wants to see only indexed array-like properties therefore must stick to an integer index. Code that is fully aware of what for ... in does and really need to see all properties, well then that's ok too.
Visual Studio 2013 License Product Key
I solved this, without having to completely reinstall Visual Studio 2013.
For those who may come across this in the future, the following steps worked for me:
- Run the ISO (or
vs_professional.exe). If you get the error below, you need to update the Windows Registry to trick the installer into thinking you still have the base version. If you don't get this error, skip to step 3
Click the link for 'examine the log file' and look near the bottom of the log, for this line:
open
regedit.exeand do anEdit > Find...for that GUID. In my case it was{6dff50d0-3bc3-4a92-b724-bf6d6a99de4f}. This was found in:HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall{6dff50d0-3bc3-4a92-b724-bf6d6a99de4f}
Edit the
BundleVersionvalue and change it to a lower version. I changed mine from12.0.21005.13to12.0.21000.13:
Exit the registry
Run the ISO (or
vs_professional.exe) again. If it has a repair button like the image below, you can skip to step 4.
- Otherwise you have to let the installer fix the registry. I did this by "installing" at least one feature, even though I think I already had all features (they were not detected). This took about 20 minutes.
Run the ISO (or
vs_professional.exe) again. This time repair should be visible.Click
Repairand let it update your installation and apply its embedded license key. This took about 20 minutes.
Now when you run Visual Studio 2013, it should indicate that a license key was applied, under Help > Register Product:
Hope this helps somebody in the future!
Lombok annotations do not compile under Intellij idea
On Itellij 15 CE, it's enough to just install Lombok Plugin (no additional configuration required).
CSS3 selector to find the 2nd div of the same class
HTML
<h1> Target Bar Elements </h1>
<div class="foo">Foo Element</div>
<div class="bar">Bar Element</div>
<div class="baz">Baz Element</div>
<div class="bar">Bar Second Element</div>
<div class="jar">Jar Element</div>
<div class="kar">Kar Element</div>
<div class="bar">Bar Third Element</div>
CSS
.bar {background:red;}
.bar~.bar {background:green;}
.bar~.bar~.bar {background:yellow;}
How to get active user's UserDetails
And if you need authorized user in templates (e.g. JSP) use
<%@ taglib prefix="sec" uri="http://www.springframework.org/security/tags" %>
<sec:authentication property="principal.yourCustomField"/>
together with
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-taglibs</artifactId>
<version>${spring-security.version}</version>
</dependency>
EL access a map value by Integer key
Based on the above post i tried this and this worked fine I wanted to use the value of Map B as keys for Map A:
<c:if test="${not empty activityCodeMap and not empty activityDescMap}">
<c:forEach var="valueMap" items="${auditMap}">
<tr>
<td class="activity_white"><c:out value="${activityCodeMap[valueMap.value.activityCode]}"/></td>
<td class="activity_white"><c:out value="${activityDescMap[valueMap.value.activityDescCode]}"/></td>
<td class="activity_white">${valueMap.value.dateTime}</td>
</tr>
</c:forEach>
</c:if>
git rm - fatal: pathspec did not match any files
I had a duplicate directory (~web/web) and it removed the nested duplicate when I ran rm -rf web while inside the first web folder.
Switch android x86 screen resolution
Verified the following on Virtualbox-5.0.24, Android_x86-4.4-r5. You get a screen similar to an 8" table. You can play around with the xxx in DPI=xxx, to change the resolution. xxx=100 makes it really small to match a real table exactly, but it may be too small when working with android in Virtualbox.
VBoxManage setextradata <VmName> "CustomVideoMode1" "440x680x16"
With the following appended to android kernel cmd:
UVESA_MODE=440x680 DPI=120
setSupportActionBar toolbar cannot be applied to (android.widget.Toolbar) error
Certify that your Manifest declaration includes android:theme="@style/AppTheme.NoActionBar" tag, like the following:
<activity
android:name=".PointsScreen"
android:theme="@style/AppTheme.NoActionBar">
</activity>
Authorize a non-admin developer in Xcode / Mac OS
Ned Deily's solution works perfectly fine, provided your user is allowed to sudo.
If he's not, you can su to an admin account, then use his dscl . append /Groups/_developer GroupMembership $user, where $user is the username.
However, I mistakenly thought it did not because I wrongly typed in the user's name in the command and it silently fails.
Therefore, after entering this command, you should proof-check it. This will check if $user is in $group, where the variables represent respectively the user name and the group name.
dsmemberutil checkmembership -U $user -G $group
This command will either print the message user is not a member of the group or user is a member of the group.
SQL Statement using Where clause with multiple values
SELECT PersonName, songName, status
FROM table
WHERE name IN ('Holly', 'Ryan')
If you are using parametrized Stored procedure:
- Pass in comma separated string
- Use special function to split comma separated string into table value variable
- Use
INNER JOIN ON t.PersonName = newTable.PersonNameusing a table variable which contains passed in names
How do you receive a url parameter with a spring controller mapping
You should be using @RequestParam instead of @ModelAttribute, e.g.
@RequestMapping("/{someID}")
public @ResponseBody int getAttr(@PathVariable(value="someID") String id,
@RequestParam String someAttr) {
}
You can even omit @RequestParam altogether if you choose, and Spring will assume that's what it is:
@RequestMapping("/{someID}")
public @ResponseBody int getAttr(@PathVariable(value="someID") String id,
String someAttr) {
}
How to style a checkbox using CSS
I think the easiest way to do it is by styling a label and making the checkbox invisible.
HTML
<input type="checkbox" id="first" />
<label for="first"> </label>
CSS
checkbox {
display: none;
}
checkbox + label {
/* Style for checkbox normal */
width: 16px;
height: 16px;
}
checkbox::checked + label,
label.checked {
/* Style for checkbox checked */
}
The checkbox, even though it is hidden, will still be accessible, and its value will be sent when a form is submitted. For old browsers you might have to change the class of the label to checked using JavaScript because I don't think old versions of Internet Explorer understand ::checked on the checkbox.
Disable button in jQuery
Try this code:
HTML
<button type='button' id = 'rbutton_'+i onclick="disable(i)">Click me</button>
function
function disable(i){
$("#rbutton_"+i).attr("disabled","disabled");
}
Other solution with jquery
$('button').click(function(){
$(this).attr("disabled","disabled");
});
Other solution with pure javascript
<button type='button' id = 'rbutton_1' onclick="disable(1)">Click me</button>
<script>
function disable(i){
document.getElementById("rbutton_"+i).setAttribute("disabled","disabled");
}
</script>
How to get the client IP address in PHP
$_SERVER['REMOTE_ADDR'];
Example:
if (!empty($_SERVER['HTTP_CLIENT_IP'])) {
$ip = $_SERVER['HTTP_CLIENT_IP'];
} elseif (!empty($_SERVER['HTTP_X_FORWARDED_FOR'])) {
$ip = $_SERVER['HTTP_X_FORWARDED_FOR'];
} else {
$ip = $_SERVER['REMOTE_ADDR'];
}
oracle SQL how to remove time from date
We can use TRUNC function in Oracle DB. Here is an example.
SELECT TRUNC(TO_DATE('01 Jan 2018 08:00:00','DD-MON-YYYY HH24:MI:SS')) FROM DUAL
Output: 1/1/2018
No Entity Framework provider found for the ADO.NET provider with invariant name 'System.Data.SqlClient'
I just got into the same problem and it looks like EntityFramework although installed from NuGet Package Manager was not correctly installed in the project.
I managed to fix it by running the following command on Package Manager Console:
PM> Install-Package EntityFramework
pandas how to check dtype for all columns in a dataframe?
To go one step further, I assume you want to do something with these dtypes.
df.dtypes.to_dict() comes in handy.
my_type = 'float64' #<---
dtypes = dataframe.dtypes.to_dict()
for col_nam, typ in dtypes.items():
if (typ != my_type): #<---
raise ValueError(f"Yikes - `dataframe['{col_name}'].dtype == {typ}` not {my_type}")
You'll find that Pandas did a really good job comparing NumPy classes and user-provided strings. For example: even things like 'double' == dataframe['col_name'].dtype will succeed when .dtype==np.float64.
How to close a thread from within?
When you start a thread, it begins executing a function you give it (if you're extending threading.Thread, the function will be run()). To end the thread, just return from that function.
According to this, you can also call thread.exit(), which will throw an exception that will end the thread silently.
return string with first match Regex
You shouldn't be using .findall() at all - .search() is what you want. It finds the leftmost match, which is what you want (or returns None if no match exists).
m = re.search(pattern, text)
result = m.group(0) if m else ""
Whether you want to put that in a function is up to you. It's unusual to want to return an empty string if no match is found, which is why nothing like that is built in. It's impossible to get confused about whether .search() on its own finds a match (it returns None if it didn't, or an SRE_Match object if it did).
How to launch html using Chrome at "--allow-file-access-from-files" mode?
Quit (force quit) all instances of chrome. Otherwise the below command will not work.
open -a "Google Chrome" --args --allow-file-access-from-files
Executing this command in terminal will open Chrome regardless of where it is installed.
What is (functional) reactive programming?
Disclaimer: my answer is in the context of rx.js - a 'reactive programming' library for Javascript.
In functional programming, instead of iterating through each item of a collection, you apply higher order functions (HoFs) to the collection itself. So the idea behind FRP is that instead of processing each individual event, create a stream of events (implemented with an observable*) and apply HoFs to that instead. This way you can visualize the system as data pipelines connecting publishers to subscribers.
The major advantages of using an observable are:
i) it abstracts away state from your code, e.g., if you want the event handler to get fired only for every 'n'th event, or stop firing after the first 'n' events, or start firing only after the first 'n' events, you can just use the HoFs (filter, takeUntil, skip respectively) instead of setting, updating and checking counters.
ii) it improves code locality - if you have 5 different event handlers changing the state of a component, you can merge their observables and define a single event handler on the merged observable instead, effectively combining 5 event handlers into 1. This makes it very easy to reason about what events in your entire system can affect a component, since it's all present in a single handler.
- An Observable is the dual of an Iterable.
An Iterable is a lazily consumed sequence - each item is pulled by the iterator whenever it wants to use it, and hence the enumeration is driven by the consumer.
An observable is a lazily produced sequence - each item is pushed to the observer whenever it is added to the sequence, and hence the enumeration is driven by the producer.
How can I save a screenshot directly to a file in Windows?
Very old post I realize, but windows finally realized how inane the process was.
In Windows 8.1 (verified, not working in windows 7 (tnx @bobobobo))
windows key + prnt screen saves the screenshot into a folder in <user>/Pictures/Screenshots
The action or event has been blocked by Disabled Mode
I solved this with Access options.
Go to the Office Button --> Access Options --> Trust Center --> Trust Center Settings Button --> Message Bar
In the right hand pane I selected the radio button "Show the message bar in all applications when content has been blocked."
Closed Access, reopened the database and got the warning for blocked content again.
Could not autowire field:RestTemplate in Spring boot application
Please make sure two things:
1- Use @Bean annotation with the method.
@Bean
public RestTemplate restTemplate(RestTemplateBuilder builder){
return builder.build();
}
2- Scope of this method should be public not private.
Complete Example -
@Service
public class MakeHttpsCallImpl implements MakeHttpsCall {
@Autowired
private RestTemplate restTemplate;
@Override
public String makeHttpsCall() {
return restTemplate.getForObject("https://localhost:8085/onewayssl/v1/test",String.class);
}
@Bean
public RestTemplate restTemplate(RestTemplateBuilder builder){
return builder.build();
}
}
How to copy in bash all directory and files recursive?
cp -r ./SourceFolder ./DestFolder
Get CPU Usage from Windows Command Prompt
C:\> wmic cpu get loadpercentage
LoadPercentage
0
Or
C:\> @for /f "skip=1" %p in ('wmic cpu get loadpercentage') do @echo %p%
4%
Handling file renames in git
For Xcode users: If your rename your file in Xcode you see the badge icon change to append. If you do a commit using XCode you will actually create a new file and lose the history.
A workaround is easy but you have to do it before commiting using Xcode:
- Do a git Status on your folder. You should see that the staged changes are correct:
renamed: Project/OldName.h -> Project/NewName.h renamed: Project/OldName.m -> Project/NewName.m
- do commit -m 'name change'
Then go back to XCode and you will see the badge changed from A to M and it is save to commit furtur changes in using xcode now.
Mod in Java produces negative numbers
The problem here is that in Python the % operator returns the modulus and in Java it returns the remainder. These functions give the same values for positive arguments, but the modulus always returns positive results for negative input, whereas the remainder may give negative results. There's some more information about it in this question.
You can find the positive value by doing this:
int i = (((-1 % 2) + 2) % 2)
or this:
int i = -1 % 2;
if (i<0) i += 2;
(obviously -1 or 2 can be whatever you want the numerator or denominator to be)
Change image size via parent div
I'm not sure about what you mean by "I have no access to image" But if you have access to parent div you can do the following:
Firs give id or class to your div:
<div class="parent">
<img src="http://someimage.jpg">
</div>
Than add this to your css:
.parent {
width: 42px; /* I took the width from your post and placed it in css */
height: 42px;
}
/* This will style any <img> element in .parent div */
.parent img {
height: 100%;
width: 100%;
}
Reading Properties file in Java
Given the context loader.getResourceAsStream("myPackage/myProp.properties") should be used.
Leading '/' doesn't work with ClassLoader.getResourceAsStream(String) method.
Alternatively you could use Class.getResourceAsStream(String) method, which uses '/' to determine if the path is absolute or relative to the class location.
Examples:
myClass.class.getResourceAsStream("myProp.properties")
myClass.class.getResourceAsStream("/myPackage/myProp.properties")
How to round a Double to the nearest Int in swift?
You may also want to check whether the double is higher than the max Int value before trying to convert the value to an Int.
let number = Double.infinity
if number >= Double(integerLiteral: Int64.max) {
let rounded = Int.max
} else {
let rounded = Int(number.rounded())
}
MySQL: Error Code: 1118 Row size too large (> 8126). Changing some columns to TEXT or BLOB
I was having same issue. I search "innodb_strict_mode" in my.ini but couldn't found.
I then added the same, it will still show you the warning, but you can continue. just add
innodb_strict_mode = 0;
How to know elastic search installed version from kibana?
Another way to do it on Ubuntu 18.0.4
sudo /usr/share/kibana/bin/kibana --version
Is it possible to append Series to rows of DataFrame without making a list first?
Something like this could work...
mydf.loc['newindex'] = myseries
Here is an example where I used it...
stats = df[['bp_prob', 'ICD9_prob', 'meds_prob', 'regex_prob']].describe()
stats
Out[32]:
bp_prob ICD9_prob meds_prob regex_prob
count 171.000000 171.000000 171.000000 171.000000
mean 0.179946 0.059071 0.067020 0.126812
std 0.271546 0.142681 0.152560 0.207014
min 0.000000 0.000000 0.000000 0.000000
25% 0.000000 0.000000 0.000000 0.000000
50% 0.000000 0.000000 0.000000 0.013116
75% 0.309019 0.065248 0.066667 0.192954
max 1.000000 1.000000 1.000000 1.000000
medians = df[['bp_prob', 'ICD9_prob', 'meds_prob', 'regex_prob']].median()
stats.loc['median'] = medians
stats
Out[36]:
bp_prob ICD9_prob meds_prob regex_prob
count 171.000000 171.000000 171.000000 171.000000
mean 0.179946 0.059071 0.067020 0.126812
std 0.271546 0.142681 0.152560 0.207014
min 0.000000 0.000000 0.000000 0.000000
25% 0.000000 0.000000 0.000000 0.000000
50% 0.000000 0.000000 0.000000 0.013116
75% 0.309019 0.065248 0.066667 0.192954
max 1.000000 1.000000 1.000000 1.000000
median 0.000000 0.000000 0.000000 0.013116
How to stop VBA code running?
Or, if you want to avoid the use of a global variable you could use the rarely used .Tag property of the userform:
Private Sub CommandButton1_Click()
Me.CommandButton1.Enabled = False 'Disabling button so user cannot push it
'multiple times
Me.CommandButton1.caption = "Wait..." 'Jamie's suggestion
Me.Tag = "Cancel"
End Sub
Private Sub SomeVBASub
If LCase(UserForm1.Tag) = "cancel" Then
GoTo StopProcess
Else
'DoStuff
End If
Exit Sub
StopProcess:
'Here you can do some steps to be able to cancel process adequately
'i.e. setting collections to "Nothing" deleting some files...
End Sub
How do I set a cookie on HttpClient's HttpRequestMessage
The accepted answer is the correct way to do this in most cases. However, there are some situations where you want to set the cookie header manually. Normally if you set a "Cookie" header it is ignored, but that's because HttpClientHandler defaults to using its CookieContainer property for cookies. If you disable that then by setting UseCookies to false you can set cookie headers manually and they will appear in the request, e.g.
var baseAddress = new Uri("http://example.com");
using (var handler = new HttpClientHandler { UseCookies = false })
using (var client = new HttpClient(handler) { BaseAddress = baseAddress })
{
var message = new HttpRequestMessage(HttpMethod.Get, "/test");
message.Headers.Add("Cookie", "cookie1=value1; cookie2=value2");
var result = await client.SendAsync(message);
result.EnsureSuccessStatusCode();
}
Cross-platform way of getting temp directory in Python
I use:
from pathlib import Path
import platform
import tempfile
tempdir = Path("/tmp" if platform.system() == "Darwin" else tempfile.gettempdir())
This is because on MacOS, i.e. Darwin, tempfile.gettempdir() and os.getenv('TMPDIR') return a value such as '/var/folders/nj/269977hs0_96bttwj2gs_jhhp48z54/T'; it is one that I do not always want.
How to get the month name in C#?
string CurrentMonth = String.Format("{0:MMMM}", DateTime.Now)
What's faster, SELECT DISTINCT or GROUP BY in MySQL?
It seems that the queries are not exactly the same. At least for MySQL.
Compare:
- describe select distinct productname from northwind.products
- describe select productname from northwind.products group by productname
The second query gives additionally "Using filesort" in Extra.
Stored procedure - return identity as output parameter or scalar
I prefer to return the identity value as an output parameter. The result of the SP should indicate whether it succeeded or not. A value of 0 indicates the SP successfully completed, a non-zero value indicates an error. Also, if you ever need to make a change and return an additional value from the SP you don't need to make any changes other than adding an additional output parameter.
What does auto do in margin:0 auto?
It becomes clearer with some explanation of how the two values work.
The margin property is shorthand for:
margin-top
margin-right
margin-bottom
margin-left
So how come only two values?
Well, you can express margin with four values like this:
margin: 10px, 20px, 15px, 5px;
which would mean 10px top, 20px right, 15px bottom, 5px left
Likewise you can also express with two values like this:
margin: 20px 10px;
This would give you a margin 20px top and bottom and 10px left and right.
And if you set:
margin: 20px auto;
Then that means top and bottom margin of 20px and left and right margin of auto. And auto means that the left/right margin are automatically set based on the container. If your element is a block type element, meaning it is a box and takes up the entire width of the view, then auto sets the left and right margin the same and hence the element is centered.
What does .shape[] do in "for i in range(Y.shape[0])"?
shape is a tuple that gives you an indication of the number of dimensions in the array. So in your case, since the index value of Y.shape[0] is 0, your are working along the first dimension of your array.
From http://www.scipy.org/Tentative_NumPy_Tutorial#head-62ef2d3c0a5b4b7d6fdc48e4a60fe48b1ffe5006
An array has a shape given by the number of elements along each axis:
>>> a = floor(10*random.random((3,4)))
>>> a
array([[ 7., 5., 9., 3.],
[ 7., 2., 7., 8.],
[ 6., 8., 3., 2.]])
>>> a.shape
(3, 4)
and http://www.scipy.org/Numpy_Example_List#shape has some more examples.
How to use Jackson to deserialise an array of objects
you could also create a class which extends ArrayList:
public static class MyList extends ArrayList<Myclass> {}
and then use it like:
List<MyClass> list = objectMapper.readValue(json, MyList.class);
Range of values in C Int and Long 32 - 64 bits
A 32-bit unsigned int has a range from 0 to 4,294,967,295. 0 to 65535 would be a 16-bit unsigned.
An unsigned long long (and, on a 64-bit implementation, possibly also ulong and possibly uint as well) have a range (at least) from 0 to 18,446,744,073,709,551,615 (264-1). In theory it could be greater than that, but at least for now that's rare to nonexistent.
Where are the python modules stored?
If you are using conda or pip to install modules you can use
pip list
or
conda list
to display all the modules. This will display all the modules in the terminal itself and is much faster than
>>> help('modules')
Problems with local variable scope. How to solve it?
not Error:
JSONObject json1 = getJsonX();
Error:
JSONObject json2 = null;
if(x == y)
json2 = getJSONX();
Error: Local variable statement defined in an enclosing scope must be final or effectively final.
But you can write:
JSONObject json2 = (x == y) ? json2 = getJSONX() : null;
Pure Javascript listen to input value change
instead of id use title to identify your element and write the code as below.
$(document).ready(()=>{
$("input[title='MyObject']").change(()=>{
console.log("Field has been changed...")
})
});
Automatic exit from Bash shell script on error
Here is how to do it:
#!/bin/sh
abort()
{
echo >&2 '
***************
*** ABORTED ***
***************
'
echo "An error occurred. Exiting..." >&2
exit 1
}
trap 'abort' 0
set -e
# Add your script below....
# If an error occurs, the abort() function will be called.
#----------------------------------------------------------
# ===> Your script goes here
# Done!
trap : 0
echo >&2 '
************
*** DONE ***
************
'
How to stop a function
This will end the function, and you can even customize the "Error" message:
import sys
def end():
if condition:
# the player wants to play again:
main()
elif not condition:
sys.exit("The player doesn't want to play again") #Right here
Initializing a member array in constructor initializer
How about
...
C() : arr{ {1,2,3} }
{}
...
?
Compiles fine on g++ 4.8
How to list active / open connections in Oracle?
When I'd like to view incoming connections from our application servers to the database I use the following command:
SELECT username FROM v$session
WHERE username IS NOT NULL
ORDER BY username ASC;
Simple, but effective.
Installing Pandas on Mac OSX
Not an innovative way but below two steps might save a ton of time and energy.
- Updating (Installing Command Line Tool) Code.
This can be done by openinig XCode -> Menu -> Preference -> Components -> Command Line Tool
- Removing all but Python 2.7
I did installed different instances of python at different time and removing all but 2.7 was helpful in my case. Note : You may have to install modules after doing it. So get ready with pip/easy_install/ports.
Uninstall can be done with super easy steps mentioned in following link.
jQuery selectors on custom data attributes using HTML5
jQuery provides several selectors (full list) in order to make the queries you are looking for work. To address your question "In other cases is it possible to use other selectors like "contains, less than, greater than, etc..."." you can also use contains, starts with, and ends with to look at these html5 data attributes. See the full list above in order to see all of your options.
The basic querying has been covered above, and using John Hartsock's answer is going to be the best bet to either get every data-company element, or to get every one except Microsoft (or any other version of :not).
In order to expand this to the other points you are looking for, we can use several meta selectors. First, if you are going to do multiple queries, it is nice to cache the parent selection.
var group = $('ul[data-group="Companies"]');
Next, we can look for companies in this set who start with G
var google = $('[data-company^="G"]',group);//google
Or perhaps companies which contain the word soft
var microsoft = $('[data-company*="soft"]',group);//microsoft
It is also possible to get elements whose data attribute's ending matches
var facebook = $('[data-company$="book"]',group);//facebook
//stored selector_x000D_
var group = $('ul[data-group="Companies"]');_x000D_
_x000D_
//data-company starts with G_x000D_
var google = $('[data-company^="G"]',group).css('color','green');_x000D_
_x000D_
//data-company contains soft_x000D_
var microsoft = $('[data-company*="soft"]',group).css('color','blue');_x000D_
_x000D_
//data-company ends with book_x000D_
var facebook = $('[data-company$="book"]',group).css('color','pink');<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>_x000D_
<ul data-group="Companies">_x000D_
<li data-company="Microsoft">Microsoft</li>_x000D_
<li data-company="Google">Google</li>_x000D_
<li data-company ="Facebook">Facebook</li>_x000D_
</ul>Can I have multiple :before pseudo-elements for the same element?
In CSS2.1, an element can only have at most one of any kind of pseudo-element at any time. (This means an element can have both a :before and an :after pseudo-element — it just cannot have more than one of each kind.)
As a result, when you have multiple :before rules matching the same element, they will all cascade and apply to a single :before pseudo-element, as with a normal element. In your example, the end result looks like this:
.circle.now:before {
content: "Now";
font-size: 19px;
color: black;
}
As you can see, only the content declaration that has highest precedence (as mentioned, the one that comes last) will take effect — the rest of the declarations are discarded, as is the case with any other CSS property.
This behavior is described in the Selectors section of CSS2.1:
Pseudo-elements behave just like real elements in CSS with the exceptions described below and elsewhere.
This implies that selectors with pseudo-elements work just like selectors for normal elements. It also means the cascade should work the same way. Strangely, CSS2.1 appears to be the only reference; neither css3-selectors nor css3-cascade mention this at all, and it remains to be seen whether it will be clarified in a future specification.
If an element can match more than one selector with the same pseudo-element, and you want all of them to apply somehow, you will need to create additional CSS rules with combined selectors so that you can specify exactly what the browser should do in those cases. I can't provide a complete example including the content property here, since it's not clear for instance whether the symbol or the text should come first. But the selector you need for this combined rule is either .circle.now:before or .now.circle:before — whichever selector you choose is personal preference as both selectors are equivalent, it's only the value of the content property that you will need to define yourself.
If you still need a concrete example, see my answer to this similar question.
The legacy css3-content specification contains a section on inserting multiple ::before and ::after pseudo-elements using a notation that's compatible with the CSS2.1 cascade, but note that that particular document is obsolete — it hasn't been updated since 2003, and no one has implemented that feature in the past decade. The good news is that the abandoned document is actively undergoing a rewrite in the guise of css-content-3 and css-pseudo-4. The bad news is that the multiple pseudo-elements feature is nowhere to be found in either specification, presumably owing, again, to lack of implementer interest.
How to mock void methods with Mockito
The solution of so-called problem is to use a spy Mockito.spy(...) instead of a mock Mockito.mock(..).
Spy enables us to partial mocking. Mockito is good at this matter. Because you have class which is not complete, in this way you mock some required place in this class.
How to get history on react-router v4?
Basing on this answer if you need history object only in order to navigate to other component:
import { useHistory } from "react-router-dom";
function HomeButton() {
const history = useHistory();
function handleClick() {
history.push("/home");
}
return (
<button type="button" onClick={handleClick}>
Go home
</button>
);
}
Better way to check if a Path is a File or a Directory?
using System;
using System.IO;
namespace FileOrDirectory
{
class Program
{
public static string FileOrDirectory(string path)
{
if (File.Exists(path))
return "File";
if (Directory.Exists(path))
return "Directory";
return "Path Not Exists";
}
static void Main()
{
Console.WriteLine("Enter The Path:");
string path = Console.ReadLine();
Console.WriteLine(FileOrDirectory(path));
}
}
}
Making WPF applications look Metro-styled, even in Windows 7? (Window Chrome / Theming / Theme)
What I did was creating my own Window and Style. Because I like to have control over everything and I didn't want some external libraries just to use a Window from it. I looked at already mentioned MahApps.Metro on GitHub
and also very nice Modern UI on GitHub. (.NET4.5 only)
There is one more it's Elysium but I really didn't try this one.
The style I did was really easy when I looked how it's done in these. Now I have my own Window and I can do whatever I want with xaml... for me it's the main reason why I did my own. And I made one more for you too :) I should probably say that I wouldn't be able to do it without exploring Modern UI it was great help. I tried to make it look like VS2012 Window. It looks like this.
Here is code (please note that it's targeting .NET4.5)
public class MyWindow : Window
{
public MyWindow()
{
this.CommandBindings.Add(new CommandBinding(SystemCommands.CloseWindowCommand, this.OnCloseWindow));
this.CommandBindings.Add(new CommandBinding(SystemCommands.MaximizeWindowCommand, this.OnMaximizeWindow, this.OnCanResizeWindow));
this.CommandBindings.Add(new CommandBinding(SystemCommands.MinimizeWindowCommand, this.OnMinimizeWindow, this.OnCanMinimizeWindow));
this.CommandBindings.Add(new CommandBinding(SystemCommands.RestoreWindowCommand, this.OnRestoreWindow, this.OnCanResizeWindow));
}
private void OnCanResizeWindow(object sender, CanExecuteRoutedEventArgs e)
{
e.CanExecute = this.ResizeMode == ResizeMode.CanResize || this.ResizeMode == ResizeMode.CanResizeWithGrip;
}
private void OnCanMinimizeWindow(object sender, CanExecuteRoutedEventArgs e)
{
e.CanExecute = this.ResizeMode != ResizeMode.NoResize;
}
private void OnCloseWindow(object target, ExecutedRoutedEventArgs e)
{
SystemCommands.CloseWindow(this);
}
private void OnMaximizeWindow(object target, ExecutedRoutedEventArgs e)
{
SystemCommands.MaximizeWindow(this);
}
private void OnMinimizeWindow(object target, ExecutedRoutedEventArgs e)
{
SystemCommands.MinimizeWindow(this);
}
private void OnRestoreWindow(object target, ExecutedRoutedEventArgs e)
{
SystemCommands.RestoreWindow(this);
}
}
And here resources:
<BooleanToVisibilityConverter x:Key="bool2VisibilityConverter" />
<Color x:Key="WindowBackgroundColor">#FF2D2D30</Color>
<Color x:Key="HighlightColor">#FF3F3F41</Color>
<Color x:Key="BlueColor">#FF007ACC</Color>
<Color x:Key="ForegroundColor">#FFF4F4F5</Color>
<SolidColorBrush x:Key="WindowBackgroundColorBrush" Color="{StaticResource WindowBackgroundColor}"/>
<SolidColorBrush x:Key="HighlightColorBrush" Color="{StaticResource HighlightColor}"/>
<SolidColorBrush x:Key="BlueColorBrush" Color="{StaticResource BlueColor}"/>
<SolidColorBrush x:Key="ForegroundColorBrush" Color="{StaticResource ForegroundColor}"/>
<Style x:Key="WindowButtonStyle" TargetType="{x:Type Button}">
<Setter Property="Foreground" Value="{DynamicResource ForegroundColorBrush}" />
<Setter Property="Background" Value="Transparent" />
<Setter Property="HorizontalContentAlignment" Value="Center" />
<Setter Property="VerticalContentAlignment" Value="Center" />
<Setter Property="Padding" Value="1" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type Button}">
<Grid Background="{TemplateBinding Background}">
<ContentPresenter x:Name="contentPresenter"
HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
VerticalAlignment="{TemplateBinding VerticalContentAlignment}"
SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"
Margin="{TemplateBinding Padding}"
RecognizesAccessKey="True" />
</Grid>
<ControlTemplate.Triggers>
<Trigger Property="IsMouseOver" Value="True">
<Setter Property="Background" Value="{StaticResource HighlightColorBrush}" />
</Trigger>
<Trigger Property="IsPressed" Value="True">
<Setter Property="Background" Value="{DynamicResource BlueColorBrush}" />
</Trigger>
<Trigger Property="IsEnabled" Value="false">
<Setter TargetName="contentPresenter" Property="Opacity" Value=".5" />
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<Style x:Key="MyWindowStyle" TargetType="local:MyWindow">
<Setter Property="Foreground" Value="{DynamicResource ForegroundColorBrush}" />
<Setter Property="Background" Value="{DynamicResource WindowBackgroundBrush}"/>
<Setter Property="ResizeMode" Value="CanResizeWithGrip" />
<Setter Property="UseLayoutRounding" Value="True" />
<Setter Property="TextOptions.TextFormattingMode" Value="Display" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="local:MyWindow">
<Border x:Name="WindowBorder" Margin="{Binding Source={x:Static SystemParameters.WindowNonClientFrameThickness}}" Background="{StaticResource WindowBackgroundColorBrush}">
<Grid>
<Border BorderThickness="1">
<AdornerDecorator>
<Grid x:Name="LayoutRoot">
<Grid.RowDefinitions>
<RowDefinition Height="25" />
<RowDefinition Height="*" />
<RowDefinition Height="15" />
</Grid.RowDefinitions>
<ContentPresenter Grid.Row="1" Grid.RowSpan="2" Margin="7"/>
<Rectangle x:Name="HeaderBackground" Height="25" Fill="{DynamicResource WindowBackgroundColorBrush}" VerticalAlignment="Top" Grid.Row="0"/>
<StackPanel Orientation="Horizontal" HorizontalAlignment="Right" VerticalAlignment="Top" WindowChrome.IsHitTestVisibleInChrome="True" Grid.Row="0">
<Button Command="{Binding Source={x:Static SystemCommands.MinimizeWindowCommand}}" ToolTip="minimize" Style="{StaticResource WindowButtonStyle}">
<Button.Content>
<Grid Width="30" Height="25" RenderTransform="1,0,0,1,0,1">
<Path Data="M0,6 L8,6 Z" Width="8" Height="7" VerticalAlignment="Center" HorizontalAlignment="Center"
Stroke="{Binding Foreground, RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=Button}}" StrokeThickness="2" />
</Grid>
</Button.Content>
</Button>
<Grid Margin="1,0,1,0">
<Button x:Name="Restore" Command="{Binding Source={x:Static SystemCommands.RestoreWindowCommand}}" ToolTip="restore" Visibility="Collapsed" Style="{StaticResource WindowButtonStyle}">
<Button.Content>
<Grid Width="30" Height="25" UseLayoutRounding="True" RenderTransform="1,0,0,1,.5,.5">
<Path Data="M2,0 L8,0 L8,6 M0,3 L6,3 M0,2 L6,2 L6,8 L0,8 Z" Width="8" Height="8" VerticalAlignment="Center" HorizontalAlignment="Center"
Stroke="{Binding Foreground, RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=Button}}" StrokeThickness="1" />
</Grid>
</Button.Content>
</Button>
<Button x:Name="Maximize" Command="{Binding Source={x:Static SystemCommands.MaximizeWindowCommand}}" ToolTip="maximize" Style="{StaticResource WindowButtonStyle}">
<Button.Content>
<Grid Width="31" Height="25">
<Path Data="M0,1 L9,1 L9,8 L0,8 Z" Width="9" Height="8" VerticalAlignment="Center" HorizontalAlignment="Center"
Stroke="{Binding Foreground, RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=Button}}" StrokeThickness="2" />
</Grid>
</Button.Content>
</Button>
</Grid>
<Button Command="{Binding Source={x:Static SystemCommands.CloseWindowCommand}}" ToolTip="close" Style="{StaticResource WindowButtonStyle}">
<Button.Content>
<Grid Width="30" Height="25" RenderTransform="1,0,0,1,0,1">
<Path Data="M0,0 L8,7 M8,0 L0,7 Z" Width="8" Height="7" VerticalAlignment="Center" HorizontalAlignment="Center"
Stroke="{Binding Foreground, RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=Button}}" StrokeThickness="1.5" />
</Grid>
</Button.Content>
</Button>
</StackPanel>
<TextBlock x:Name="WindowTitleTextBlock" Grid.Row="0" Text="{TemplateBinding Title}" HorizontalAlignment="Left" TextTrimming="CharacterEllipsis" VerticalAlignment="Center" Margin="8 -1 0 0" FontSize="16" Foreground="{TemplateBinding Foreground}"/>
<Grid Grid.Row="2">
<Path x:Name="ResizeGrip" Visibility="Collapsed" Width="12" Height="12" Margin="1" HorizontalAlignment="Right"
Stroke="{StaticResource BlueColorBrush}" StrokeThickness="1" Stretch="None" Data="F1 M1,10 L3,10 M5,10 L7,10 M9,10 L11,10 M2,9 L2,11 M6,9 L6,11 M10,9 L10,11 M5,6 L7,6 M9,6 L11,6 M6,5 L6,7 M10,5 L10,7 M9,2 L11,2 M10,1 L10,3" />
</Grid>
</Grid>
</AdornerDecorator>
</Border>
<Border BorderBrush="{StaticResource BlueColorBrush}" BorderThickness="1" Visibility="{Binding IsActive, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type Window}}, Converter={StaticResource bool2VisibilityConverter}}" />
</Grid>
</Border>
<ControlTemplate.Triggers>
<Trigger Property="WindowState" Value="Maximized">
<Setter TargetName="Maximize" Property="Visibility" Value="Collapsed" />
<Setter TargetName="Restore" Property="Visibility" Value="Visible" />
<Setter TargetName="LayoutRoot" Property="Margin" Value="7" />
</Trigger>
<Trigger Property="WindowState" Value="Normal">
<Setter TargetName="Maximize" Property="Visibility" Value="Visible" />
<Setter TargetName="Restore" Property="Visibility" Value="Collapsed" />
</Trigger>
<MultiTrigger>
<MultiTrigger.Conditions>
<Condition Property="ResizeMode" Value="CanResizeWithGrip" />
<Condition Property="WindowState" Value="Normal" />
</MultiTrigger.Conditions>
<Setter TargetName="ResizeGrip" Property="Visibility" Value="Visible" />
</MultiTrigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
<Setter Property="WindowChrome.WindowChrome">
<Setter.Value>
<WindowChrome CornerRadius="0" GlassFrameThickness="1" UseAeroCaptionButtons="False" />
</Setter.Value>
</Setter>
</Style>
Is CSS Turing complete?
CSS is not a programming language, so the question of turing-completeness is a meaningless one. If programming extensions are added to CSS such as was the case in IE6 then that new synthesis is a whole different thing.
CSS is merely a description of styles; it does not have any logic, and its structure is flat.
Excel how to find values in 1 column exist in the range of values in another
Use the formula by tigeravatar:
=COUNTIF($B$2:$B$5,A2)>0 – tigeravatar Aug 28 '13 at 14:50
as conditional formatting. Highlight column A. Choose conditional formatting by forumula. Enter the formula (above) - this finds values in col B that are also in A. Choose a format (I like to use FILL and a bold color).
To find all of those values, highlight col A. Data > Filter and choose Filter by color.
JavaScript URL Decode function
I've used encodeURIComponent() and decodeURIComponent() too.
How do I declare an array variable in VBA?
Generally, you should declare variables of a specific type, rather than Variant. In this example, the test variable should be of type String.
And, because it's an array, you need to indicate that specifically when you declare the variable. There are two ways of declaring array variables:
If you know the size of the array (the number of elements that it should contain) when you write the program, you can specify that number in parentheses in the declaration:
Dim test(1) As String 'declares an array with 2 elements that holds stringsThis type of array is referred to as a static array, as its size is fixed, or static.
If you do not know the size of the array when you write the application, you can use a dynamic array. A dynamic array is one whose size is not specified in the declaration (
Dimstatement), but rather is determined later during the execution of the program using theReDimstatement. For example:Dim test() As String Dim arraySize As Integer ' Code to do other things, like calculate the size required for the array ' ... arraySize = 5 ReDim test(arraySize) 'size the array to the value of the arraySize variable
PowerMockito mock single static method and return object
What you want to do is a combination of part of 1 and all of 2.
You need to use the PowerMockito.mockStatic to enable static mocking for all static methods of a class. This means make it possible to stub them using the when-thenReturn syntax.
But the 2-argument overload of mockStatic you are using supplies a default strategy for what Mockito/PowerMock should do when you call a method you haven't explicitly stubbed on the mock instance.
From the javadoc:
Creates class mock with a specified strategy for its answers to interactions. It's quite advanced feature and typically you don't need it to write decent tests. However it can be helpful when working with legacy systems. It is the default answer so it will be used only when you don't stub the method call.
The default default stubbing strategy is to just return null, 0 or false for object, number and boolean valued methods. By using the 2-arg overload, you're saying "No, no, no, by default use this Answer subclass' answer method to get a default value. It returns a Long, so if you have static methods which return something incompatible with Long, there is a problem.
Instead, use the 1-arg version of mockStatic to enable stubbing of static methods, then use when-thenReturn to specify what to do for a particular method. For example:
import static org.mockito.Mockito.*;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.invocation.InvocationOnMock;
import org.mockito.stubbing.Answer;
import org.powermock.api.mockito.PowerMockito;
import org.powermock.core.classloader.annotations.PrepareForTest;
import org.powermock.modules.junit4.PowerMockRunner;
class ClassWithStatics {
public static String getString() {
return "String";
}
public static int getInt() {
return 1;
}
}
@RunWith(PowerMockRunner.class)
@PrepareForTest(ClassWithStatics.class)
public class StubJustOneStatic {
@Test
public void test() {
PowerMockito.mockStatic(ClassWithStatics.class);
when(ClassWithStatics.getString()).thenReturn("Hello!");
System.out.println("String: " + ClassWithStatics.getString());
System.out.println("Int: " + ClassWithStatics.getInt());
}
}
The String-valued static method is stubbed to return "Hello!", while the int-valued static method uses the default stubbing, returning 0.
String index out of range: 4
You are using the wrong iteration counter, replace inp.charAt(i) with inp.charAt(j).
Nullable property to entity field, Entity Framework through Code First
Just omit the [Required] attribute from the string somefield property. This will make it create a NULLable column in the db.
To make int types allow NULLs in the database, they must be declared as nullable ints in the model:
// an int can never be null, so it will be created as NOT NULL in db
public int someintfield { get; set; }
// to have a nullable int, you need to declare it as an int?
// or as a System.Nullable<int>
public int? somenullableintfield { get; set; }
public System.Nullable<int> someothernullableintfield { get; set; }
The easiest way to replace white spaces with (underscores) _ in bash
This is borderline programming, but look into using tr:
$ echo "this is just a test" | tr -s ' ' | tr ' ' '_'
Should do it. The first invocation squeezes the spaces down, the second replaces with underscore. You probably need to add TABs and other whitespace characters, this is for spaces only.
How to create a cron job using Bash automatically without the interactive editor?
You can probably change the default editor to ed and use a heredoc to edit.
EDITOR=ed
export EDITOR
crontab -e << EOF
> a
> * * * * * Myscript
> * * * * * AnotherScript
> * * * * * MoreScript
> .
> w
> q
> EOF
Note the leading > in that code means the return/enter key is pressed to create a new line.
The a means APPEND so it will not overwrite anything.
The . means you're done editing.
The w means WRITE the changes.
The q means QUIT or exit ed.
you can check it out
crontab -l
You can delete an entry too.
EDITOR=ed
export EDITOR
crontab -e << EOF
> /Myscript/
> d
> .
> w
> q
> EOF
That will delete the crontab entry with Myscript in it.
The d means delete the pattern inside the / /.
No check it again
crontab -l
This solution works inside a script too less the > of course :-)
Disable vertical sync for glxgears
I found a solution that works in the intel card and in the nvidia card using Bumblebee.
> export vblank_mode=0
glxgears
...
optirun glxgears
...
export vblank_mode=1
Java 8 Iterable.forEach() vs foreach loop
When reading this question one can get the impression, that Iterable#forEach in combination with lambda expressions is a shortcut/replacement for writing a traditional for-each loop. This is simply not true. This code from the OP:
joins.forEach(join -> mIrc.join(mSession, join));
is not intended as a shortcut for writing
for (String join : joins) {
mIrc.join(mSession, join);
}
and should certainly not be used in this way. Instead it is intended as a shortcut (although it is not exactly the same) for writing
joins.forEach(new Consumer<T>() {
@Override
public void accept(T join) {
mIrc.join(mSession, join);
}
});
And it is as a replacement for the following Java 7 code:
final Consumer<T> c = new Consumer<T>() {
@Override
public void accept(T join) {
mIrc.join(mSession, join);
}
};
for (T t : joins) {
c.accept(t);
}
Replacing the body of a loop with a functional interface, as in the examples above, makes your code more explicit: You are saying that (1) the body of the loop does not affect the surrounding code and control flow, and (2) the body of the loop may be replaced with a different implementation of the function, without affecting the surrounding code. Not being able to access non final variables of the outer scope is not a deficit of functions/lambdas, it is a feature that distinguishes the semantics of Iterable#forEach from the semantics of a traditional for-each loop. Once one gets used to the syntax of Iterable#forEach, it makes the code more readable, because you immediately get this additional information about the code.
Traditional for-each loops will certainly stay good practice (to avoid the overused term "best practice") in Java. But this doesn't mean, that Iterable#forEach should be considered bad practice or bad style. It is always good practice, to use the right tool for doing the job, and this includes mixing traditional for-each loops with Iterable#forEach, where it makes sense.
Since the downsides of Iterable#forEach have already been discussed in this thread, here are some reasons, why you might probably want to use Iterable#forEach:
To make your code more explicit: As described above,
Iterable#forEachcan make your code more explicit and readable in some situations.To make your code more extensible and maintainable: Using a function as the body of a loop allows you to replace this function with different implementations (see Strategy Pattern). You could e.g. easily replace the lambda expression with a method call, that may be overwritten by sub-classes:
joins.forEach(getJoinStrategy());Then you could provide default strategies using an enum, that implements the functional interface. This not only makes your code more extensible, it also increases maintainability because it decouples the loop implementation from the loop declaration.
To make your code more debuggable: Seperating the loop implementation from the declaration can also make debugging more easy, because you could have a specialized debug implementation, that prints out debug messages, without the need to clutter your main code with
if(DEBUG)System.out.println(). The debug implementation could e.g. be a delegate, that decorates the actual function implementation.To optimize performance-critical code: Contrary to some of the assertions in this thread,
Iterable#forEachdoes already provide better performance than a traditional for-each loop, at least when using ArrayList and running Hotspot in "-client" mode. While this performance boost is small and negligible for most use cases, there are situations, where this extra performance can make a difference. E.g. library maintainers will certainly want to evaluate, if some of their existing loop implementations should be replaced withIterable#forEach.To back this statement up with facts, I have done some micro-benchmarks with Caliper. Here is the test code (latest Caliper from git is needed):
@VmOptions("-server") public class Java8IterationBenchmarks { public static class TestObject { public int result; } public @Param({"100", "10000"}) int elementCount; ArrayList<TestObject> list; TestObject[] array; @BeforeExperiment public void setup(){ list = new ArrayList<>(elementCount); for (int i = 0; i < elementCount; i++) { list.add(new TestObject()); } array = list.toArray(new TestObject[list.size()]); } @Benchmark public void timeTraditionalForEach(int reps){ for (int i = 0; i < reps; i++) { for (TestObject t : list) { t.result++; } } return; } @Benchmark public void timeForEachAnonymousClass(int reps){ for (int i = 0; i < reps; i++) { list.forEach(new Consumer<TestObject>() { @Override public void accept(TestObject t) { t.result++; } }); } return; } @Benchmark public void timeForEachLambda(int reps){ for (int i = 0; i < reps; i++) { list.forEach(t -> t.result++); } return; } @Benchmark public void timeForEachOverArray(int reps){ for (int i = 0; i < reps; i++) { for (TestObject t : array) { t.result++; } } } }And here are the results:
When running with "-client",
Iterable#forEachoutperforms the traditional for loop over an ArrayList, but is still slower than directly iterating over an array. When running with "-server", the performance of all approaches is about the same.To provide optional support for parallel execution: It has already been said here, that the possibility to execute the functional interface of
Iterable#forEachin parallel using streams, is certainly an important aspect. SinceCollection#parallelStream()does not guarantee, that the loop is actually executed in parallel, one must consider this an optional feature. By iterating over your list withlist.parallelStream().forEach(...);, you explicitly say: This loop supports parallel execution, but it does not depend on it. Again, this is a feature and not a deficit!By moving the decision for parallel execution away from your actual loop implementation, you allow optional optimization of your code, without affecting the code itself, which is a good thing. Also, if the default parallel stream implementation does not fit your needs, no one is preventing you from providing your own implementation. You could e.g. provide an optimized collection depending on the underlying operating system, on the size of the collection, on the number of cores, and on some preference settings:
public abstract class MyOptimizedCollection<E> implements Collection<E>{ private enum OperatingSystem{ LINUX, WINDOWS, ANDROID } private OperatingSystem operatingSystem = OperatingSystem.WINDOWS; private int numberOfCores = Runtime.getRuntime().availableProcessors(); private Collection<E> delegate; @Override public Stream<E> parallelStream() { if (!System.getProperty("parallelSupport").equals("true")) { return this.delegate.stream(); } switch (operatingSystem) { case WINDOWS: if (numberOfCores > 3 && delegate.size() > 10000) { return this.delegate.parallelStream(); }else{ return this.delegate.stream(); } case LINUX: return SomeVerySpecialStreamImplementation.stream(this.delegate.spliterator()); case ANDROID: default: return this.delegate.stream(); } } }The nice thing here is, that your loop implementation doesn't need to know or care about these details.
ValueError: shape mismatch: objects cannot be broadcast to a single shape
This particular error implies that one of the variables being used in the arithmetic on the line has a shape incompatible with another on the same line (i.e., both different and non-scalar). Since n and the output of np.add.reduce() are both scalars, this implies that the problem lies with xm and ym, the two of which are simply your x and y inputs minus their respective means.
Based on this, my guess is that your x and y inputs have different shapes from one another, making them incompatible for element-wise multiplication.
** Technically, it's not that variables on the same line have incompatible shapes. The only problem is when two variables being added, multiplied, etc., have incompatible shapes, whether the variables are temporary (e.g., function output) or not. Two variables with different shapes on the same line are fine as long as something else corrects the issue before the mathematical expression is evaluated.
add item in array list of android
you can use this add string to list on a button click
final String a[]={"hello","world"};
final ArrayAdapter<String> at=new ArrayAdapter<String>(getApplicationContext(), android.R.layout.simple_list_item_1,a);
final ListView sp=(ListView)findViewById(R.id.listView1);
sp.setAdapter(at);
final EditText et=(EditText)findViewById(R.id.editText1);
Button b=(Button)findViewById(R.id.button1);
b.setOnClickListener(new OnClickListener()
{
@Override
public void onClick(View v)
{
// TODO Auto-generated method stub
int k=sp.getCount();
String a1[]=new String[k+1];
for(int i=0;i<k;i++)
a1[i]=sp.getItemAtPosition(i).toString();
a1[k]=et.getText().toString();
ArrayAdapter<String> ats=new ArrayAdapter<String>(getApplicationContext(), android.R.layout.simple_list_item_1,a1);
sp.setAdapter(ats);
}
});
So on a button click it will get string from edittext and store in listitem. you can change this to your needs.
How to refresh the data in a jqGrid?
var newdata= //You call Ajax peticion//
$("#idGrid").clearGridData();
$("#idGrid").jqGrid('setGridParam', {data:newdata)});
$("#idGrid").trigger("reloadGrid");
in event update data table
Center/Set Zoom of Map to cover all visible Markers?
To extend the given answer with few useful tricks:
var markers = //some array;
var bounds = new google.maps.LatLngBounds();
for(i=0;i<markers.length;i++) {
bounds.extend(markers[i].getPosition());
}
//center the map to a specific spot (city)
map.setCenter(center);
//center the map to the geometric center of all markers
map.setCenter(bounds.getCenter());
map.fitBounds(bounds);
//remove one zoom level to ensure no marker is on the edge.
map.setZoom(map.getZoom()-1);
// set a minimum zoom
// if you got only 1 marker or all markers are on the same address map will be zoomed too much.
if(map.getZoom()> 15){
map.setZoom(15);
}
//Alternatively this code can be used to set the zoom for just 1 marker and to skip redrawing.
//Note that this will not cover the case if you have 2 markers on the same address.
if(count(markers) == 1){
map.setMaxZoom(15);
map.fitBounds(bounds);
map.setMaxZoom(Null)
}
UPDATE:
Further research in the topic show that fitBounds() is a asynchronic
and it is best to make Zoom manipulation with a listener defined before calling Fit Bounds.
Thanks @Tim, @xr280xr, more examples on the topic : SO:setzoom-after-fitbounds
google.maps.event.addListenerOnce(map, 'bounds_changed', function(event) {
this.setZoom(map.getZoom()-1);
if (this.getZoom() > 15) {
this.setZoom(15);
}
});
map.fitBounds(bounds);
Underline text in UIlabel
You can create a custom label with name UnderlinedLabel and edit drawRect function.
#import "UnderlinedLabel.h"
@implementation UnderlinedLabel
- (void)drawRect:(CGRect)rect
{
NSString *normalTex = self.text;
NSDictionary *underlineAttribute = @{NSUnderlineStyleAttributeName: @(NSUnderlineStyleSingle)};
self.attributedText = [[NSAttributedString alloc] initWithString:normalTex
attributes:underlineAttribute];
[super drawRect:rect];
}
How can I use Google's Roboto font on a website?
This is what I did to get the woff2 files I wanted for static deployment without having to use a CDN
TEMPORARILY add the cdn for the css to load the roboto fonts into index.html and let the page load. from google dev tools look at sources and expand the fonts.googleapis.com node and view the content of the css?family=Roboto:300,400,500&display=swap file and copy the content. Put this content in a css file in your assets directory.
In the css file, remove all the greek, cryllic and vietnamese stuff.
Look at the lines in this css file that are similar to:
src: local('Roboto Light'), local('Roboto-Light'), url(https://fonts.gstatic.com/s/roboto/v20/KFOlCnqEu92Fr1MmSU5fBBc4.woff2) format('woff2');
copy the link address and paste it in your browser, it will download the font. Put this font into your assets folder and rename it here, as well as in the css file. Do this to the other links, I had 6 unique woff2 files.
I followed the same steps for material icons.
Now go back and comment the line where you call the cdn and instead use use the new css file you created.
Vendor code 17002 to connect to SQLDeveloper
In your case the "Vendor code 17002" is the equivalent of the ORA-12541 error: It's most likely that your listener is down, or has an improper port or service name. From the docs:
ORA-12541: TNS no listener
Cause: Listener for the source repository has not been started.
Action: Start the Listener on the machine where the source repository resides.
How to make my layout able to scroll down?
If you even did not get scroll after doing what is written above .....
Set the android:layout_height="250dp"or you can say xdp where x can be any numerical value.
Can You Get A Users Local LAN IP Address Via JavaScript?
Chrome 76+
Last year I used Linblow's answer (2018-Oct-19) to successfully discover my local IP via javascript. However, recent Chrome updates (76?) have wonked this method so that it now returns an obfuscated IP, such as: 1f4712db-ea17-4bcf-a596-105139dfd8bf.local
If you have full control over your browser, you can undo this behavior by turning it off in Chrome Flags, by typing this into your address bar:
chrome://flags
and DISABLING the flag Anonymize local IPs exposed by WebRTC
In my case, I require the IP for a TamperMonkey script to determine my present location and do different things based on my location. I also have full control over my own browser settings (no Corporate Policies, etc). So for me, changing the chrome://flags setting does the trick.
Sources:
https://groups.google.com/forum/#!topic/discuss-webrtc/6stQXi72BEU
https://codelabs.developers.google.com/codelabs/webrtc-web/index.html
AngularJS dynamic routing
As of AngularJS 1.1.3, you can now do exactly what you want using the new catch-all parameter.
https://github.com/angular/angular.js/commit/7eafbb98c64c0dc079d7d3ec589f1270b7f6fea5
From the commit:
This allows routeProvider to accept parameters that matches substrings even when they contain slashes if they are prefixed with an asterisk instead of a colon. For example, routes like
edit/color/:color/largecode/*largecodewill match with something like thishttp://appdomain.com/edit/color/brown/largecode/code/with/slashs.
I have tested it out myself (using 1.1.5) and it works great. Just keep in mind that each new URL will reload your controller, so to keep any kind of state, you may need to use a custom service.
What replaces cellpadding, cellspacing, valign, and align in HTML5 tables?
On particular table
<table style="border-collapse: separate; border-spacing: 10px;" >_x000D_
<tr>_x000D_
<td>Hi</td>_x000D_
<td>Hello</td>_x000D_
<tr/>_x000D_
<tr>_x000D_
<td>Hola</td>_x000D_
<td>Oi!</td>_x000D_
<tr/>_x000D_
</table>Import cycle not allowed
You may have imported,
project/controllers/base
inside the
project/controllers/routes
You have already imported before. That's not supported.
Generate HTML table from 2D JavaScript array
Here's a version using template literals. It maps over the data creating new arrays of strings build from the template literals, and then adds them to the document with insertAdjacentHTML:
let data = [_x000D_
['Title', 'Artist', 'Duration', 'Created'],_x000D_
['hello', 'me', '2', '2019'],_x000D_
['ola', 'me', '3', '2018'],_x000D_
['Bob', 'them', '4.3', '2006']_x000D_
];_x000D_
_x000D_
function getCells(data, type) {_x000D_
return data.map(cell => `<${type}>${cell}</${type}>`).join('');_x000D_
}_x000D_
_x000D_
function createBody(data) {_x000D_
return data.map(row => `<tr>${getCells(row, 'td')}</tr>`).join('');_x000D_
}_x000D_
_x000D_
function createTable(data) {_x000D_
const [headings, ...rows] = data;_x000D_
return `_x000D_
<table>_x000D_
<thead>${getCells(headings, 'th')}</thead>_x000D_
<tbody>${createBody(rows)}</tbody>_x000D_
</table>_x000D_
`;_x000D_
}_x000D_
_x000D_
document.body.insertAdjacentHTML('beforeend', createTable(data));table { border-collapse: collapse; }_x000D_
tr { border: 1px solid #dfdfdf; }_x000D_
th, td { padding: 2px 5px 2px 5px;}Time in milliseconds in C
The standard C library provides timespec_get. It can tell time up to nanosecond precision, if the system supports. Calling it, however, takes a bit more effort because it involves a struct. Here's a function that just converts the struct to a simple 64-bit integer so you can get time in milliseconds.
#include <stdio.h>
#include <inttypes.h>
#include <time.h>
int64_t millis()
{
struct timespec now;
timespec_get(&now, TIME_UTC);
return ((int64_t) now.tv_sec) * 1000 + ((int64_t) now.tv_nsec) / 1000000;
}
int main(void)
{
printf("Unix timestamp with millisecond precision: %" PRId64 "\n", millis());
}
Unlike clock, this function returns a Unix timestamp so it will correctly account for the time spent in blocking functions, such as sleep.
change pgsql port
You can also change the port when starting up:
$ pg_ctl -o "-F -p 5433" start
Or
$ postgres -p 5433
More about this in the manual.
Displaying files (e.g. images) stored in Google Drive on a website
You can follow below steps to embed the files you want to your website.
- Find the PDF file in Google Drive
- Preview the PDF file in Google Drive
- Pop-out the Google Drive preview
- Use the More actions menu and choose Embed item
- Copy code provided
- Edit Google Sites page where you want to embed
- Open the HTML Editor
- Paste the HTML embed code provided by the Google Drive preview
- Use the Update button and Save the page
References: https://www.steegle.com/websites/google-sites-howtos/embed-drive-pdf
How to add a string to a string[] array? There's no .Add function
Use List<T> from System.Collections.Generic
List<string> myCollection = new List<string>();
…
myCollection.Add(aString);
Or, shorthand (using collection initialiser):
List<string> myCollection = new List<string> {aString, bString}
If you really want an array at the end, use
myCollection.ToArray();
You might be better off abstracting to an interface, such as IEnumerable, then just returning the collection.
Edit: If you must use an array, you can preallocate it to the right size (i.e. the number of FileInfo you have). Then, in the foreach loop, maintain a counter for the array index you need to update next.
private string[] ColeccionDeCortes(string Path)
{
DirectoryInfo X = new DirectoryInfo(Path);
FileInfo[] listaDeArchivos = X.GetFiles();
string[] Coleccion = new string[listaDeArchivos.Length];
int i = 0;
foreach (FileInfo FI in listaDeArchivos)
{
Coleccion[i++] = FI.Name;
//Add the FI.Name to the Coleccion[] array,
}
return Coleccion;
}
Class has been compiled by a more recent version of the Java Environment
Your JDK version: Java 8
Your JRE version: Java 9
Here your JRE version is different than the JDK version that's the case. Here you can compile all the java classes using JDK version 1.8. If you want to compile only one java class just change the *.java into <yourclassname>.java
javac -source 1.8 -target 1.8 *.java
source: The version that your source code requires to compile.
target: The oldest JRE version you want to support.
Pushing value of Var into an Array
.val() does not return an array from a DOM element: $('#fruit') is going to find the element in the document with an ID of #fruit and get its value (if it has a value).
Get the value of bootstrap Datetimepicker in JavaScript
I'm using the latest Bootstrap 3 DateTime Picker (http://eonasdan.github.io/bootstrap-datetimepicker/)
This is how you should use DateTime Picker inline:
var selectedDate = $("#datetimepicker").find(".active").data("day");
The above returned: 03/23/2017
No route matches "/users/sign_out" devise rails 3
You probably didn't include jquery_ujs javascript file. Make sure you are using the latest version of jquery-ujs : https://github.com/rails/jquery-ujs and the last files available :
rails generate jquery:install
You should not have any more rails.js file. If you do, you're probably out-of-date. Make sure also this file is loaded with defaults, in config/application.rb
config.action_view.javascript_expansions[:defaults] = %w(jquery.min jquery_ujs)
(Again, you should not have rails.js file here). Finally, add the link as documented on Devise wiki (haml-style):
= link_to('Logout', destroy_user_session_path, :method => 'delete')
And everything will be fine.
Twitter Bootstrap vs jQuery UI?
We have used both and we like Bootstrap for its simplicity and the pace at which it's being developed and enhanced. The problem with jQuery UI is that it's moving at a snail's pace. It's taking years to roll out common features like Menubar, Tree control and DataGrid which are in planning/development stage for ever. We waited waited waited and finally given up and used other libraries like ExtJS for our product http://dblite.com.
Bootstrap has come up with quite a comprehensive set of features in a very short period of time and I am sure it will outpace jQuery UI pretty soon.
So I see no point in using something that will eventually be outdated...
Logarithmic returns in pandas dataframe
Log returns are simply the natural log of 1 plus the arithmetic return. So how about this?
df['pct_change'] = df.price.pct_change()
df['log_return'] = np.log(1 + df.pct_change)
Even more concise, utilizing Ximix's suggestion:
df['log_return'] = np.log1p(df.price.pct_change())
close fancy box from function from within open 'fancybox'
I ended up using:
<script>parent.$("#fancy_close").click();</script>
I guess the version of fancybox we have doesn't have a $.fancybox.close() function for me to call :(
FYI, I just wanted the page to close the fancybox, as it had finished its processing in PHP.
How to make use of ng-if , ng-else in angularJS
I am adding some of the important concern about ng directives:-
- Directives will respond the same place where it's execute.
- ng-else concept is not there, you can with only if, or other flavor like switch statement.
Check out the below example:-
<div ng-if="data.type == 'FirstValue' ">
//different template with hoot data</div>
<div ng-if="data.type == 'SecondValue' ">
//different template with story data</div>
<div ng-if="data.type == 'ThirdValue' ">
//different template with article data</div>
As per datatype it is going to render any one of the div.
Android RatingBar change star colors
Now you can use DrawableCompat from AppCompat v22.1.0 onwards to dynamically tint all kind of drawables, useful when you're supporting multiple themes with a single set of drawables. For example:
LayerDrawable layerDrawable = (LayerDrawable) ratingBar.getProgressDrawable();
DrawableCompat.setTint(DrawableCompat.wrap(layerDrawable.getDrawable(0)), Color.RED); // Empty star
DrawableCompat.setTint(DrawableCompat.wrap(layerDrawable.getDrawable(1)), Color.GREEN); // Partial star
DrawableCompat.setTint(DrawableCompat.wrap(layerDrawable.getDrawable(2)), Color.BLUE); // Full star
This is backwards compatible down to API 4. Also see Chris Banes' blog post on Support Libraries v22.1.0
For the actual size and shape you will need to define a new style and layer-list drawables for the appropriate size, as others have already answered above.
How can I rename a field for all documents in MongoDB?
This nodejs code just do that , as @Felix Yan mentioned former way seems to work just fine , i had some issues with other snipets hope this helps.
This will rename column "oldColumnName" to be "newColumnName" of table "documents"
var MongoClient = require('mongodb').MongoClient
, assert = require('assert');
// Connection URL
//var url = 'mongodb://localhost:27017/myproject';
var url = 'mongodb://myuser:[email protected]:portNumber/databasename';
// Use connect method to connect to the server
MongoClient.connect(url, function(err, db) {
assert.equal(null, err);
console.log("Connected successfully to server");
renameDBColumn(db, function() {
db.close();
});
});
//
// This function should be used for renaming a field for all documents
//
var renameDBColumn = function(db, callback) {
// Get the documents collection
console.log("renaming database column of table documents");
//use the former way:
remap = function (x) {
if (x.oldColumnName){
db.collection('documents').update({_id:x._id}, {$set:{"newColumnName":x.oldColumnName}, $unset:{"oldColumnName":1}});
}
}
db.collection('documents').find().forEach(remap);
console.log("db table documents remap successfully!");
}