#Multiserver | Programs & Examples on Multiserver

How to load html string in a webview?

To load your data in WebView. Call loadData() method of WebView

wv.loadData(yourData, "text/html", "UTF-8");

You can check this example

http://developer.android.com/reference/android/webkit/WebView.html

[Edit 1]

You should add -- \ -- before -- " -- for example --> name=\"spanish press\"

below string worked for me

String webData =  "<!DOCTYPE html><head> <meta http-equiv=\"Content-Type\" " +
"content=\"text/html; charset=utf-8\"> <html><head><meta http-equiv=\"content-type\" content=\"text/html; charset=windows-1250\">"+
 "<meta name=\"spanish press\" content=\"spain, spanish newspaper, news,economy,politics,sports\"><title></title></head><body id=\"body\">"+
"<script src=\"http://www.myscript.com/a\"></script>slkassldkassdksasdkasskdsk</body></html>";

Centering a background image, using CSS

background-image: url(path-to-file/img.jpg);
background-repeat:no-repeat;
background-position: center center;

That should work.

If not, why not make a div with the image and use z-index to make it the background? This would be much easier to center than a background image on the body.

Other than that try:

background-position: 0 100px;/*use a pixel value that will center it*/ Or I think you can use 50% if you have set your body min-height to 100%.

body{

    background-repeat:no-repeat;
    background-position: center center;
    background-image:url(../images/images2.jpg);
    color:#FFF;
    font-family:Arial, Helvetica, sans-serif;
    min-height:100%;
}

Get Substring between two characters using javascript

You can also use this one...

_x000D_

function extractText(str,delimiter){_x000D_
  if (str && delimiter){_x000D_
    var firstIndex = str.indexOf(delimiter)+1;_x000D_
    var lastIndex = str.lastIndexOf(delimiter);_x000D_
    str = str.substring(firstIndex,lastIndex);_x000D_
  }_x000D_
  return str;_x000D_
}_x000D_
_x000D_
_x000D_
var quotes = document.getElementById("quotes");_x000D_
_x000D_
// &#34 - represents quotation mark in HTML

_x000D_

<div>_x000D_
_x000D_
_x000D_
  <div>_x000D_
  _x000D_
    <span id="at">_x000D_
      My string is @between@ the "at" sign_x000D_
    </span>_x000D_
    <button onclick="document.getElementById('at').innerText = extractText(document.getElementById('at').innerText,'@')">Click</button>_x000D_
  _x000D_
  </div>_x000D_
  _x000D_
  <div>_x000D_
    <span id="quotes">_x000D_
      My string is "between" quotes chars_x000D_
    </span>_x000D_
    <button onclick="document.getElementById('quotes').innerText = extractText(document.getElementById('quotes').innerText,'&#34')">Click</button>_x000D_
  _x000D_
  </div>_x000D_
_x000D_
</div>

_x000D_

How to get the start time of a long-running Linux process?

 ps -eo pid,etime,cmd|sort -n -k2

Code line wrapping - how to handle long lines

Uses Guava's static factory methods for Maps and is only 105 characters long.

private static final Map<Class<? extends Persistent>, PersistentHelper> class2helper = Maps.newHashMap();

Reading from stdin

From the man read:

#include <unistd.h>
ssize_t read(int fd, void *buf, size_t count);

Input parameters:

int fd file descriptor is an integer and not a file pointer. The file descriptor for stdin is 0
void *buf pointer to buffer to store characters read by the read function
size_t count maximum number of characters to read

So you can read character by character with the following code:

char buf[1];

while(read(0, buf, sizeof(buf))>0) {
   // read() here read from stdin charachter by character
   // the buf[0] contains the character got by read()
   ....
}

Do you have a _ViewStart.cshtml in this directory? I had the same problem you're having when I tried using _ViewStart. Then I renamed it _mydefaultview, moved it to the Views/Shared directory, and switched to specifying no view in cshtml files where I don't want it, and specifying _mydefaultview for the rest. Don't know why this was necessary, but it worked.

Using python's mock patch.object to change the return value of a method called within another method

Let me clarify what you're talking about: you want to test Foo in a testcase, which calls external method uses_some_other_method. Instead of calling the actual method, you want to mock the return value.

class Foo:
    def method_1():
       results = uses_some_other_method()
    def method_n():
       results = uses_some_other_method()

Suppose the above code is in foo.py and uses_some_other_method is defined in module bar.py. Here is the unittest:

import unittest
import mock

from foo import Foo


class TestFoo(unittest.TestCase):

    def setup(self):
        self.foo = Foo()

    @mock.patch('foo.uses_some_other_method')
    def test_method_1(self, mock_method):
        mock_method.return_value = 3
        self.foo.method_1(*args, **kwargs)

        mock_method.assert_called_with(*args, **kwargs)

If you want to change the return value every time you passed in different arguments, mock provides side_effect.

Do on-demand Mac OS X cloud services exist, comparable to Amazon's EC2 on-demand instances?

Here are some methods that may help others, though they aren't really services as much as they may be described as "methods that may, after some torture of effort or logic, lead to a claim of on-demand access to Mac OS X" (no doubt I should patent that phrase).

Fundamentally, I am inclined to believe that on-demand (per-hour) hosting does not exist, and @Erik has given information for the shortest feasible services, i.e. monthly hosting.

It seems that one may use EC2 itself, but install OS X on the instance through a lot of elbow grease.

This article on Lifehacker.com gives instructions for setting up OSX under Virtual Box and depends on hardware virtualization. It seems that the Cluster Compute instances (and Cluster GPU, but ignore these) are the only ones supporting hardware virtualization.
This article gives instructions for transferring a VirtualBox image to EC2.

Where this gets tricky is I'm not sure if this will work for a cluster compute instance. In fact, I think this is likely to be a royal pain. A similar approach may work for Rackspace or other cloud services.

I found only this site claiming on-demand Mac hosting, with a Mac Mini. It doesn't look particularly accurate: it offers free on-demand access to a Mini if one pays for a month of bandwidth. That's like free bandwidth if one rents a Mini for a month. That's not really how "on-demand" works.

Update 1: In the end, it seems that nobody offers a comparable service. An outfit called Media Temple claims they will offer the first virtual servers using Parallels, OS X Leopard, and some other stuff (in other words, I wonder if there is some caveat that makes them unique, but, without that caveat, someone else may have a usable offering).

After this search, I think that a counterpart to EC2 does not exist for the OS X operating system. It is extraordinarily unlikely that one would exist, offer a scalable solution, and yet be very difficult to find. One could set it up internally, but there's no reseller/vendor offering on-demand, hourly virtual servers. This may be disappointing, but not surprising - apparently iCloud is running on Amazon and Microsoft systems.

How to wait for all threads to finish, using ExecutorService?

Use a CountDownLatch:

CountDownLatch latch = new CountDownLatch(totalNumberOfTasks);
ExecutorService taskExecutor = Executors.newFixedThreadPool(4);
while(...) {
  taskExecutor.execute(new MyTask());
}

try {
  latch.await();
} catch (InterruptedException E) {
   // handle
}

and within your task (enclose in try / finally)

latch.countDown();

How to programmatically click a button in WPF?

WPF takes a slightly different approach than WinForms here. Instead of having the automation of a object built into the API, they have a separate class for each object that is responsible for automating it. In this case you need the ButtonAutomationPeer to accomplish this task.

ButtonAutomationPeer peer = new ButtonAutomationPeer(someButton);
IInvokeProvider invokeProv = peer.GetPattern(PatternInterface.Invoke) as IInvokeProvider;
invokeProv.Invoke();

Here is a blog post on the subject.

Note: IInvokeProvider interface is defined in the UIAutomationProvider assembly.

Get underlined text with Markdown

You can wrote **_bold and italic_** and re-style it to underlined text, like this:

strong>em,
em>strong,
b>i,
i>b {
    font-style:normal;
    font-weight:normal;
    text-decoration:underline;
}

VBA - If a cell in column A is not blank the column B equals

Use the function IF :

=IF ( logical_test, value_if_true, value_if_false )

WPF global exception handler

Best answer is probably https://stackoverflow.com/a/1472562/601990.

Here is some code that shows how to use it:

App.xaml.cs

public sealed partial class App
{
    protected override void OnStartup(StartupEventArgs e)
    {
        // setting up the Dependency Injection container
        var resolver = ResolverFactory.Get();

        // getting the ILogger or ILog interface
        var logger = resolver.Resolve<ILogger>();
        RegisterGlobalExceptionHandling(logger);

        // Bootstrapping Dependency Injection 
        // injects ViewModel into MainWindow.xaml
        // remember to remove the StartupUri attribute in App.xaml
        var mainWindow = resolver.Resolve<Pages.MainWindow>();
        mainWindow.Show();
    }

    private void RegisterGlobalExceptionHandling(ILogger log)
    {
        // this is the line you really want 
        AppDomain.CurrentDomain.UnhandledException += 
            (sender, args) => CurrentDomainOnUnhandledException(args, log);

        // optional: hooking up some more handlers
        // remember that you need to hook up additional handlers when 
        // logging from other dispatchers, shedulers, or applications

        Application.Dispatcher.UnhandledException += 
            (sender, args) => DispatcherOnUnhandledException(args, log);

        Application.Current.DispatcherUnhandledException +=
            (sender, args) => CurrentOnDispatcherUnhandledException(args, log);

        TaskScheduler.UnobservedTaskException += 
            (sender, args) => TaskSchedulerOnUnobservedTaskException(args, log);
    }

    private static void TaskSchedulerOnUnobservedTaskException(UnobservedTaskExceptionEventArgs args, ILogger log)
    {
        log.Error(args.Exception, args.Exception.Message);
        args.SetObserved();
    }

    private static void CurrentOnDispatcherUnhandledException(DispatcherUnhandledExceptionEventArgs args, ILogger log)
    {
        log.Error(args.Exception, args.Exception.Message);
        // args.Handled = true;
    }

    private static void DispatcherOnUnhandledException(DispatcherUnhandledExceptionEventArgs args, ILogger log)
    {
        log.Error(args.Exception, args.Exception.Message);
        // args.Handled = true;
    }

    private static void CurrentDomainOnUnhandledException(UnhandledExceptionEventArgs args, ILogger log)
    {
        var exception = args.ExceptionObject as Exception;
        var terminatingMessage = args.IsTerminating ? " The application is terminating." : string.Empty;
        var exceptionMessage = exception?.Message ?? "An unmanaged exception occured.";
        var message = string.Concat(exceptionMessage, terminatingMessage);
        log.Error(exception, message);
    }
}

Understanding Linux /proc/id/maps

memory mapping is not only used to map files into memory but is also a tool to request RAM from kernel. These are those inode 0 entries - your stack, heap, bss segments and more

Where Is Machine.Config?

In order to be absolutely sure, slap a Label on an ASP.NET page and run this code:

labelDebug.Text = System.Runtime.InteropServices.RuntimeEnvironment.SystemConfigurationFile;

I believe this will leave no doubt!

Shell equality operators (=, ==, -eq)

It depends on the Test Construct around the operator. Your options are double parentheses, double brackets, single brackets, or test.

If you use ((…)), you are testing arithmetic equality with == as in C:

$ (( 1==1 )); echo $?
0
$ (( 1==2 )); echo $?
1

(Note: 0 means true in the Unix sense and a failed test results in a non-zero number.)

Using -eq inside of double parentheses is a syntax error.

If you are using […] (or single brackets) or [[…]] (or double brackets), or test you can use one of -eq, -ne, -lt, -le, -gt, or -ge as an arithmetic comparison.

$ [ 1 -eq 1 ]; echo $?
0
$ [ 1 -eq 2 ]; echo $?
1
$ test 1 -eq 1; echo $?
0

The == inside of single or double brackets (or the test command) is one of the string comparison operators:

$ [[ "abc" == "abc" ]]; echo $?
0
$ [[ "abc" == "ABC" ]]; echo $?
1

As a string operator, = is equivalent to ==. Also, note the whitespace around = or ==: it’s required.

While you can do [[ 1 == 1 ]] or [[ $(( 1+1 )) == 2 ]] it is testing the string equality — not the arithmetic equality.

So -eq produces the result probably expected that the integer value of 1+1 is equal to 2 even though the right-hand side is a string and has a trailing space:

$ [[ $(( 1+1 )) -eq  "2 " ]]; echo $?
0

While a string comparison of the same picks up the trailing space and therefore the string comparison fails:

$ [[ $(( 1+1 )) == "2 " ]]; echo $?
1

And a mistaken string comparison can produce a completely wrong answer. 10 is lexicographically less than 2, so a string comparison returns true or 0. So many are bitten by this bug:

$ [[ 10 < 2 ]]; echo $?
0

The correct test for 10 being arithmetically less than 2 is this:

$ [[ 10 -lt 2 ]]; echo $?
1

In comments, there is a question about the technical reason why using the integer -eq on strings returns true for strings that are not the same:

$ [[ "yes" -eq "no" ]]; echo $?
0

The reason is that Bash is untyped. The -eq causes the strings to be interpreted as integers if possible including base conversion:

$ [[ "0x10" -eq 16 ]]; echo $?
0
$ [[ "010" -eq 8 ]]; echo $?
0
$ [[ "100" -eq 100 ]]; echo $?
0

And 0 if Bash thinks it is just a string:

$ [[ "yes" -eq 0 ]]; echo $?
0
$ [[ "yes" -eq 1 ]]; echo $?
1

So [[ "yes" -eq "no" ]] is equivalent to [[ 0 -eq 0 ]]

Last note: Many of the Bash specific extensions to the Test Constructs are not POSIX and therefore may fail in other shells. Other shells generally do not support [[...]] and ((...)) or ==.

The service cannot accept control messages at this time

This helped me: just wait about a minute or two.

Wait a few minutes, then retry your operation.

Ref: https://msdn.microsoft.com/en-us/library/ms833805.aspx

Alternative to itoa() for converting integer to string C++?

Most of the above suggestions technically aren't C++, they're C solutions.

Look into the use of std::stringstream.

Exiting out of a FOR loop in a batch file?

Did a little research on this, it appears that you are looping from 1 to 2147483647, in increments of 1.

(1, 1, 2147483647): The firs number is the starting number, the next number is the step, and the last number is the end number.

Edited To Add

It appears that the loop runs to completion regardless of any test conditions. I tested

FOR /L %%F IN (1, 1, 5) DO SET %%F=6

And it ran very quickly.

Second Edit

Since this is the only line in the batch file, you might try the EXIT command:

FOR /L %%F IN (1, 1, 2147483647) DO @IF NOT EXIST %%F EXIT

However, this will also close the DOS prompt window.

Equivalent of Clean & build in Android Studio?

In latest releases of Android Studio one more option has been added dedicatedly for Clean.

Build > Clean Project

How to convert NUM to INT in R?

You can use convert from hablar to change a column of the data frame quickly.

library(tidyverse)
library(hablar)

x <- tibble(var = c(1.34, 4.45, 6.98))

x %>% 
  convert(int(var))

gives you:

# A tibble: 3 x 1
    var
  <int>
1     1
2     4
3     6

Python Key Error=0 - Can't find Dict error in code

It only comes when your list or dictionary not available in the local function.

Calling Non-Static Method In Static Method In Java

public class StaticMethod{

    public static void main(String []args)throws Exception{
        methodOne();
    }

    public int methodOne(){
        System.out.println("we are in first methodOne");
        return 1;
    }
}

the above code not executed because static method must have that class reference.

public class StaticMethod{
    public static void main(String []args)throws Exception{

        StaticMethod sm=new StaticMethod();
        sm.methodOne();
    }

    public int methodOne(){
        System.out.println("we are in first methodOne");
        return 1;
    }
}

This will be definitely get executed. Because here we are creating reference which nothing but "sm" by using that reference of that class which is nothing but (StaticMethod=new Static method()) we are calling method one (sm.methodOne()).

I hope this will be helpful.

How to Load RSA Private Key From File

Two things. First, you must base64 decode the mykey.pem file yourself. Second, the openssl private key format is specified in PKCS#1 as the RSAPrivateKey ASN.1 structure. It is not compatible with java's PKCS8EncodedKeySpec, which is based on the SubjectPublicKeyInfo ASN.1 structure. If you are willing to use the bouncycastle library you can use a few classes in the bouncycastle provider and bouncycastle PKIX libraries to make quick work of this.

import java.io.BufferedReader;
import java.io.FileReader;
import java.security.KeyPair;
import java.security.Security;

import org.bouncycastle.jce.provider.BouncyCastleProvider;
import org.bouncycastle.openssl.PEMKeyPair;
import org.bouncycastle.openssl.PEMParser;
import org.bouncycastle.openssl.jcajce.JcaPEMKeyConverter;

// ...   

String keyPath = "mykey.pem";
BufferedReader br = new BufferedReader(new FileReader(keyPath));
Security.addProvider(new BouncyCastleProvider());
PEMParser pp = new PEMParser(br);
PEMKeyPair pemKeyPair = (PEMKeyPair) pp.readObject();
KeyPair kp = new JcaPEMKeyConverter().getKeyPair(pemKeyPair);
pp.close();
samlResponse.sign(Signature.getInstance("SHA1withRSA").toString(), kp.getPrivate(), certs);

Not unique table/alias

Your query contains columns which could be present with the same name in more than one table you are referencing, hence the not unique error. It's best if you make the references explicit and/or use table aliases when joining.

Try

    SELECT pa.ProjectID, p.Project_Title, a.Account_ID, a.Username, a.Access_Type, c.First_Name, c.Last_Name
      FROM Project_Assigned pa
INNER JOIN Account a
        ON pa.AccountID = a.Account_ID
INNER JOIN Project p
        ON pa.ProjectID = p.Project_ID
INNER JOIN Clients c
        ON a.Account_ID = c.Account_ID
     WHERE a.Access_Type = 'Client';

Create tap-able "links" in the NSAttributedString of a UILabel?

Create the class with the following .h and .m files. In the .m file there is the following function

 - (void)linkAtPoint:(CGPoint)location

Inside this function we will check the ranges of substrings for which we need to give actions. Use your own logic to put your ranges.

And following is the usage of the subclass

TaggedLabel *label = [[TaggedLabel alloc] initWithFrame:CGRectMake(100, 100, 100, 100)];
[self.view addSubview:label];
label.numberOfLines = 0;
NSMutableAttributedString *attributtedString = [[NSMutableAttributedString alloc] initWithString : @"My name is @jjpp" attributes : @{ NSFontAttributeName : [UIFont systemFontOfSize:10],}];                                                                                                                                                                              
//Do not forget to add the font attribute.. else it wont work.. it is very important
[attributtedString addAttribute:NSForegroundColorAttributeName
                        value:[UIColor redColor]
                        range:NSMakeRange(11, 5)];//you can give this range inside the .m function mentioned above

following is the .h file

#import <UIKit/UIKit.h>

@interface TaggedLabel : UILabel<NSLayoutManagerDelegate>

@property(nonatomic, strong)NSLayoutManager *layoutManager;
@property(nonatomic, strong)NSTextContainer *textContainer;
@property(nonatomic, strong)NSTextStorage *textStorage;
@property(nonatomic, strong)NSArray *tagsArray;
@property(readwrite, copy) tagTapped nameTagTapped;

@end

following is the .m file

#import "TaggedLabel.h"
@implementation TaggedLabel

- (id)initWithFrame:(CGRect)frame
{
 self = [super initWithFrame:frame];
 if (self)
 {
  self.userInteractionEnabled = YES;
 }
return self;
}

- (id)initWithCoder:(NSCoder *)aDecoder
{
 self = [super initWithCoder:aDecoder];
if (self)
{
 self.userInteractionEnabled = YES;
}
return self;
}

- (void)setupTextSystem
{
 _layoutManager = [[NSLayoutManager alloc] init];
 _textContainer = [[NSTextContainer alloc] initWithSize:CGSizeZero];
 _textStorage = [[NSTextStorage alloc] initWithAttributedString:self.attributedText];
 // Configure layoutManager and textStorage
 [_layoutManager addTextContainer:_textContainer];
 [_textStorage addLayoutManager:_layoutManager];
 // Configure textContainer
 _textContainer.lineFragmentPadding = 0.0;
 _textContainer.lineBreakMode = NSLineBreakByWordWrapping;
 _textContainer.maximumNumberOfLines = 0;
 self.userInteractionEnabled = YES;
 self.textContainer.size = self.bounds.size;
}

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
 if (!_layoutManager)
 {
  [self setupTextSystem];
 }
 // Get the info for the touched link if there is one
 CGPoint touchLocation = [[touches anyObject] locationInView:self];
 [self linkAtPoint:touchLocation];
}

- (void)linkAtPoint:(CGPoint)location
{
 // Do nothing if we have no text
 if (_textStorage.string.length == 0)
 {
  return;
 }
 // Work out the offset of the text in the view
 CGPoint textOffset = [self calcGlyphsPositionInView];
 // Get the touch location and use text offset to convert to text cotainer coords
 location.x -= textOffset.x;
 location.y -= textOffset.y;
 NSUInteger touchedChar = [_layoutManager glyphIndexForPoint:location inTextContainer:_textContainer];
 // If the touch is in white space after the last glyph on the line we don't
 // count it as a hit on the text
 NSRange lineRange;
 CGRect lineRect = [_layoutManager lineFragmentUsedRectForGlyphAtIndex:touchedChar effectiveRange:&lineRange];
 if (CGRectContainsPoint(lineRect, location) == NO)
 {
  return;
 }
 // Find the word that was touched and call the detection block
    NSRange range = NSMakeRange(11, 5);//for this example i'm hardcoding the range here. In a real scenario it should be iterated through an array for checking all the ranges
    if ((touchedChar >= range.location) && touchedChar < (range.location + range.length))
    {
     NSLog(@"range-->>%@",self.tagsArray[i][@"range"]);
    }
}

- (CGPoint)calcGlyphsPositionInView
{
 CGPoint textOffset = CGPointZero;
 CGRect textBounds = [_layoutManager usedRectForTextContainer:_textContainer];
 textBounds.size.width = ceil(textBounds.size.width);
 textBounds.size.height = ceil(textBounds.size.height);

 if (textBounds.size.height < self.bounds.size.height)
 {
  CGFloat paddingHeight = (self.bounds.size.height - textBounds.size.height) / 2.0;
  textOffset.y = paddingHeight;
 }

 if (textBounds.size.width < self.bounds.size.width)
 {
  CGFloat paddingHeight = (self.bounds.size.width - textBounds.size.width) / 2.0;
  textOffset.x = paddingHeight;
 }
 return textOffset;
 }

@end

How do I update an entity using spring-data-jpa?

Since the answer by @axtavt focuses on JPA not spring-data-jpa

To update an entity by querying then saving is not efficient because it requires two queries and possibly the query can be quite expensive since it may join other tables and load any collections that have fetchType=FetchType.EAGER

Spring-data-jpa supports update operation.
You have to define the method in Repository interface.and annotated it with @Query and @Modifying.

@Modifying
@Query("update User u set u.firstname = ?1, u.lastname = ?2 where u.id = ?3")
void setUserInfoById(String firstname, String lastname, Integer userId);

@Query is for defining custom query and @Modifying is for telling spring-data-jpa that this query is an update operation and it requires executeUpdate() not executeQuery().

You can specify other return types:
int - the number of records being updated.
boolean - true if there is a record being updated. Otherwise, false.

Note: Run this code in a Transaction.

How can I check if character in a string is a letter? (Python)

I found a good way to do this with using a function and basic code. This is a code that accepts a string and counts the number of capital letters, lowercase letters and also 'other'. Other is classed as a space, punctuation mark or even Japanese and Chinese characters.

def check(count):

    lowercase = 0
    uppercase = 0
    other = 0

    low = 'a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z'
    upper = 'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z'



    for n in count:
        if n in low:
            lowercase += 1
        elif n in upper:
            uppercase += 1
        else:
            other += 1

    print("There are " + str(lowercase) + " lowercase letters.")
    print("There are " + str(uppercase) + " uppercase letters.")
    print("There are " + str(other) + " other elements to this sentence.")

Is there a printf converter to print in binary format?

void DisplayBinary(int n)
{
    int arr[8];
    int top =-1;
    while (n)
    {
        if (n & 1)
            arr[++top] = 1;
        else
            arr[++top] = 0;

        n >>= 1;
    }
    for (int i = top ; i > -1;i--)
    {
        printf("%d",arr[i]);
    }
    printf("\n");
}

What is Python Whitespace and how does it work?

Whitespace just means characters which are used for spacing, and have an "empty" representation. In the context of python, it means tabs and spaces (it probably also includes exotic unicode spaces, but don't use them). The definitive reference is here: http://docs.python.org/2/reference/lexical_analysis.html#indentation

I'm not sure exactly how to use it.

Put it at the front of the line you want to indent. If you mix spaces and tabs, you'll likely see funky results, so stick with one or the other. (The python community usually follows PEP8 style, which prescribes indentation of four spaces).

You need to create a new indent level after each colon:

for x in range(0, 50):
    print x
    print 2*x

print x

In this code, the first two print statements are "inside" the body of the for statement because they are indented more than the line containing the for. The third print is outside because it is indented less than the previous (nonblank) line.

If you don't indent/unindent consistently, you will get indentation errors. In addition, all compound statements (i.e. those with a colon) can have the body supplied on the same line, so no indentation is required, but the body must be composed of a single statement.

Finally, certain statements, like lambda feature a colon, but cannot have a multiline block as the body.

Intercept and override HTTP requests from WebView

Here is my solution I use for my app.

I have several asset folder with css / js / img anf font files.

The application gets all filenames and looks if a file with this name is requested. If yes, it loads it from asset folder.

//get list of files of specific asset folder
        private ArrayList listAssetFiles(String path) {

            List myArrayList = new ArrayList();
            String [] list;
            try {
                list = getAssets().list(path);
                for(String f1 : list){
                    myArrayList.add(f1);
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
            return (ArrayList) myArrayList;
        }

        //get mime type by url
        public String getMimeType(String url) {
            String type = null;
            String extension = MimeTypeMap.getFileExtensionFromUrl(url);
            if (extension != null) {
                if (extension.equals("js")) {
                    return "text/javascript";
                }
                else if (extension.equals("woff")) {
                    return "application/font-woff";
                }
                else if (extension.equals("woff2")) {
                    return "application/font-woff2";
                }
                else if (extension.equals("ttf")) {
                    return "application/x-font-ttf";
                }
                else if (extension.equals("eot")) {
                    return "application/vnd.ms-fontobject";
                }
                else if (extension.equals("svg")) {
                    return "image/svg+xml";
                }
                type = MimeTypeMap.getSingleton().getMimeTypeFromExtension(extension);
            }
            return type;
        }

        //return webresourceresponse
        public WebResourceResponse loadFilesFromAssetFolder (String folder, String url) {
            List myArrayList = listAssetFiles(folder);
            for (Object str : myArrayList) {
                if (url.contains((CharSequence) str)) {
                    try {
                        Log.i(TAG2, "File:" + str);
                        Log.i(TAG2, "MIME:" + getMimeType(url));
                        return new WebResourceResponse(getMimeType(url), "UTF-8", getAssets().open(String.valueOf(folder+"/" + str)));
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }
            }
            return null;
        }

        //@TargetApi(Build.VERSION_CODES.LOLLIPOP)
        @SuppressLint("NewApi")
        @Override
        public WebResourceResponse shouldInterceptRequest(final WebView view, String url) {
            //Log.i(TAG2, "SHOULD OVERRIDE INIT");
            //String url = webResourceRequest.getUrl().toString();
            String extension = MimeTypeMap.getFileExtensionFromUrl(url);
            //I have some folders for files with the same extension
            if (extension.equals("css") || extension.equals("js") || extension.equals("img")) {
                return loadFilesFromAssetFolder(extension, url);
            }
            //more possible extensions for font folder
            if (extension.equals("woff") || extension.equals("woff2") || extension.equals("ttf") || extension.equals("svg") || extension.equals("eot")) {
                return loadFilesFromAssetFolder("font", url);
            }

            return null;
        }

[Ljava.lang.Object; cannot be cast to

java.lang.ClassCastException: [Ljava.lang.Object; cannot be cast to id.co.bni.switcherservice.model.SwitcherServiceSource

Problem is

(List<SwitcherServiceSource>) LoadSource.list();

This will return a List of Object arrays (Object[]) with scalar values for each column in the SwitcherServiceSource table. Hibernate will use ResultSetMetadata to deduce the actual order and types of the returned scalar values.

Solution

List<Object> result = (List<Object>) LoadSource.list(); 
Iterator itr = result.iterator();
while(itr.hasNext()){
   Object[] obj = (Object[]) itr.next();
   //now you have one array of Object for each row
   String client = String.valueOf(obj[0]); // don't know the type of column CLIENT assuming String 
   Integer service = Integer.parseInt(String.valueOf(obj[1])); //SERVICE assumed as int
   //same way for all obj[2], obj[3], obj[4]
}

How to copy part of an array to another array in C#?

int[] b = new int[3];
Array.Copy(a, 1, b, 0, 3);

a = source array
1 = start index in source array
b = destination array
0 = start index in destination array
3 = elements to copy

How to change Label Value using javascript

You're taking name in document.getElementById() Your cb should be txt206451 (ID Attribute) not name attribute.

You can have it by document.getElementsByName()

var cb = document.getElementsByName('field206451')[0]; // First one

var cb = document.getElementById('txt206451');

And for setting values into hidden use document.getElementsByName() like following

var cb = document.getElementById('txt206451');
var label = document.getElementsByName('label206451')[0]; // Get the first one of index
console.log(label);
cb.addEventListener('change', function (evt) { // use change here. not neccessarily
    if (this.checked) {
        label.value = 'Thanks'
    } else {
        label.value = '0'
    }
}, false);

Demo Fiddle

what's the default value of char?

Default value of Character is Character.MIN_VALUE which internally represented as MIN_VALUE = '\u0000'

Additionally, you can check if the character field contains default value as

Character DEFAULT_CHAR = new Character(Character.MIN_VALUE);
if (DEFAULT_CHAR.compareTo((Character) value) == 0)
{

}

How to calculate the time interval between two time strings

I like how this guy does it — https://amalgjose.com/2015/02/19/python-code-for-calculating-the-difference-between-two-time-stamps. Not sure if it has some cons.

But looks neat for me :)

from datetime import datetime
from dateutil.relativedelta import relativedelta

t_a = datetime.now()
t_b = datetime.now()

def diff(t_a, t_b):
    t_diff = relativedelta(t_b, t_a)  # later/end time comes first!
    return '{h}h {m}m {s}s'.format(h=t_diff.hours, m=t_diff.minutes, s=t_diff.seconds)

Regarding to the question you still need to use datetime.strptime() as others said earlier.

How to use PHP to connect to sql server

$dbhandle = sqlsrv_connect($myServer, $myUser, $myPass)
  or die("Couldn't connect to SQL Server on $myServer");

Hope it help.

How do I create a unique constraint that also allows nulls?

It is possible to create a unique constraint on a Clustered Indexed View

You can create the View like this:

CREATE VIEW dbo.VIEW_OfYourTable WITH SCHEMABINDING AS
SELECT YourUniqueColumnWithNullValues FROM dbo.YourTable
WHERE YourUniqueColumnWithNullValues IS NOT NULL;

and the unique constraint like this:

CREATE UNIQUE CLUSTERED INDEX UIX_VIEW_OFYOURTABLE 
  ON dbo.VIEW_OfYourTable(YourUniqueColumnWithNullValues)

How to split comma separated string using JavaScript?

Use

YourCommaSeparatedString.split(',');

CORS with POSTMAN

As @Musa comments it, it seems that the reason is that:

Postman doesn't care about SOP, it's a dev tool not a browser

By the way here's a chrome extension in order to make it work on your browser (this one is for chrome, but you can find either for FF or Safari).

Check here if you want to learn more about Cross-Origin and why it's working for extensions.

Extract digits from string - StringUtils Java

Use this code numberOnly will contain your desired output.

   String str="sdfvsdf68fsdfsf8999fsdf09";
   String numberOnly= str.replaceAll("[^0-9]", "");

Calculating Waiting Time and Turnaround Time in (non-preemptive) FCFS queue

wt = tt - cpu tm.
Tt = cpu tm + wt.

Where wt is a waiting time and tt is turnaround time. Cpu time is also called burst time.

SimpleXml to string

Actually asXML() converts the string into xml as it name says:

<id>5</id>

This will display normally on a web page but it will cause problems when you matching values with something else.

You may use strip_tags function to get real value of the field like:

$newString = strip_tags($xml->asXML());

PS: if you are working with integers or floating numbers, you need to convert it into integer with intval() or floatval().

$newNumber = intval(strip_tags($xml->asXML()));

In Visual Studio Code How do I merge between two local branches?

I found this extension for VS code called Git Merger. It adds Git: Merge from to the commands.

How to remove a package from Laravel using composer?

use "composer remove vendor/package"

** This is Example: Install / Add Pakage

composer require firebear/importexportfree

Uninsall / Remove

composer remove firebear/importexportfree

Finaly after removing:

php -f bin/magento setup:upgrade

php bin/magento setup:static-content:deploy –f

php bin/magento indexer:reindex 

php -f bin/magento cache:clean

ViewPager and fragments — what's the right way to store fragment's state?

I found another relatively easy solution for your question.

As you can see from the FragmentPagerAdapter source code, the fragments managed by FragmentPagerAdapter store in the FragmentManager under the tag generated using:

String tag="android:switcher:" + viewId + ":" + index;

The viewId is the container.getId(), the container is your ViewPager instance. The index is the position of the fragment. Hence you can save the object id to the outState:

@Override
protected void onSaveInstanceState(Bundle outState) {
    super.onSaveInstanceState(outState);
    outState.putInt("viewpagerid" , mViewPager.getId() );
}

@Override
    protected void onCreate(Bundle savedInstanceState) {
    setContentView(R.layout.activity_main);
    if (savedInstanceState != null)
        viewpagerid=savedInstanceState.getInt("viewpagerid", -1 );  

    MyFragmentPagerAdapter titleAdapter = new MyFragmentPagerAdapter (getSupportFragmentManager() , this);        
    mViewPager = (ViewPager) findViewById(R.id.pager);
    if (viewpagerid != -1 ){
        mViewPager.setId(viewpagerid);
    }else{
        viewpagerid=mViewPager.getId();
    }
    mViewPager.setAdapter(titleAdapter);

If you want to communicate with this fragment, you can get if from FragmentManager, such as:

getSupportFragmentManager().findFragmentByTag("android:switcher:" + viewpagerid + ":0")

The entity name must immediately follow the '&' in the entity reference

<script>//<![CDATA[
    /* script */
//]]></script>

PHP compare time

To see of the curent time is greater or equal to 14:08:10 do this:

if (time() >= strtotime("14:08:10")) {
  echo "ok";
}

Depending on your input sources, make sure to account for timezone.

See PHP time() and PHP strtotime()

Is there a good reason I see VARCHAR(255) used so often (as opposed to another length)?

When you say 2^8 you get 256, but the numbers in computers terms begins from the number 0. So, then you got the 255, you can probe it in a internet mask for the IP or in the IP itself.

255 is the maximum value of a 8 bit integer : 11111111 = 255

Does that help?

How can I extract a predetermined range of lines from a text file on Unix?

There is another approach with awk:

awk 'NR==16224, NR==16482' file

If the file is huge, it can be good to exit after reading the last desired line. This way, it won't read the following lines unnecessarily:

awk 'NR==16224, NR==16482-1; NR==16482 {print; exit}' file

awk 'NR==16224, NR==16482; NR==16482 {exit}' file

How to copy directories in OS X 10.7.3?

tl;dr

cp -R "/src/project 1/App" "/src/project 2"

Explanation:

Using quotes will cater for spaces in the directory names

cp -R "/src/project 1/App" "/src/project 2"

If the App directory is specified in the destination directory:

cp -R "/src/project 1/App" "/src/project 2/App"

and "/src/project 2/App" already exists the result will be "/src/project 2/App/App"

Best not to specify the directory copied in the destination so that the command can be repeated over and over with the expected result.

Inside a bash script:

cp -R "${1}/App" "${2}"

Comparing boxed Long values 127 and 128

Java caches the primitive values from -128 to 127. When we compare two Long objects java internally type cast it to primitive value and compare it. But above 127 the Long object will not get type caste. Java caches the output by .valueOf() method.

This caching works for Byte, Short, Long from -128 to 127. For Integer caching works From -128 to java.lang.Integer.IntegerCache.high or 127, whichever is bigger.(We can set top level value upto which Integer values should get cached by using java.lang.Integer.IntegerCache.high).

 For example:
    If we set java.lang.Integer.IntegerCache.high=500;
    then values from -128 to 500 will get cached and 

    Integer a=498;
    Integer b=499;
    System.out.println(a==b)

    Output will be "true".

Float and Double objects never gets cached.

Character will get cache from 0 to 127

You are comparing two objects. so == operator will check equality of object references. There are following ways to do it.

1) type cast both objects into primitive values and compare

    (long)val3 == (long)val4

2) read value of object and compare

    val3.longValue() == val4.longValue()

3) Use equals() method on object comparison.

    val3.equals(val4);

How to convert int to QString?

I always use QString::setNum().

int i = 10;
double d = 10.75;
QString str;
str.setNum(i);
str.setNum(d);

setNum() is overloaded in many ways. See QString class reference.

Show/Hide the console window of a C# console application

If you don't want to depends on window title use this :

    [DllImport("user32.dll")]
    static extern bool ShowWindow(IntPtr hWnd, int nCmdShow);

...

    IntPtr h = Process.GetCurrentProcess().MainWindowHandle;
    ShowWindow(h, 0);
    Application.EnableVisualStyles();
    Application.SetCompatibleTextRenderingDefault(false);
    Application.Run(new FormPrincipale());

Angularjs loading screen on ajax request

Use angular-busy:

Add cgBusy as to your app / module:

angular.module('your_app', ['cgBusy']);

Add your promise to scope:

function MyCtrl($http, User) {
  //using $http
  this.isBusy = $http.get('...');
  //if you have a User class based on $resource
  this.isBusy = User.$save();
}

In your html template:

<div cg-busy="$ctrl.isBusy"></div>

Google API authentication: Not valid origin for the client

try clear caches and then hard reload, i had same error but when i tried to run on incognito browser in chrome it worked.

Setting the JVM via the command line on Windows

Yes - just explicitly provide the path to java.exe. For instance:

c:\Users\Jon\Test>"c:\Program Files\java\jdk1.6.0_03\bin\java.exe" -version
java version "1.6.0_03"
Java(TM) SE Runtime Environment (build 1.6.0_03-b05)
Java HotSpot(TM) Client VM (build 1.6.0_03-b05, mixed mode, sharing)

c:\Users\Jon\Test>"c:\Program Files\java\jdk1.6.0_12\bin\java.exe" -version
java version "1.6.0_12"
Java(TM) SE Runtime Environment (build 1.6.0_12-b04)
Java HotSpot(TM) Client VM (build 11.2-b01, mixed mode, sharing)

The easiest way to do this for a running command shell is something like:

set PATH=c:\Program Files\Java\jdk1.6.0_03\bin;%PATH%

For example, here's a complete session showing my default JVM, then the change to the path, then the new one:

c:\Users\Jon\Test>java -version
java version "1.6.0_12"
Java(TM) SE Runtime Environment (build 1.6.0_12-b04)
Java HotSpot(TM) Client VM (build 11.2-b01, mixed mode, sharing)

c:\Users\Jon\Test>set PATH=c:\Program Files\Java\jdk1.6.0_03\bin;%PATH%

c:\Users\Jon\Test>java -version
java version "1.6.0_03"
Java(TM) SE Runtime Environment (build 1.6.0_03-b05)
Java HotSpot(TM) Client VM (build 1.6.0_03-b05, mixed mode, sharing)

This won't change programs which explicitly use JAVA_HOME though.

Note that if you get the wrong directory in the path - including one that doesn't exist - you won't get any errors, it will effectively just be ignored.

How do I get a file name from a full path with PHP?

I've done this using the function PATHINFO which creates an array with the parts of the path for you to use! For example, you can do this:

<?php
    $xmlFile = pathinfo('/usr/admin/config/test.xml');

    function filePathParts($arg1) {
        echo $arg1['dirname'], "\n";
        echo $arg1['basename'], "\n";
        echo $arg1['extension'], "\n";
        echo $arg1['filename'], "\n";
    }

    filePathParts($xmlFile);
?>

This will return:

/usr/admin/config
test.xml
xml
test

The use of this function has been available since PHP 5.2.0!

Then you can manipulate all the parts as you need. For example, to use the full path, you can do this:

$fullPath = $xmlFile['dirname'] . '/' . $xmlFile['basename'];

How to make a select with array contains value clause in psql

Try

SELECT * FROM table WHERE arr @> ARRAY['s']::varchar[]

How to split the screen with two equal LinearLayouts?

To Split a layout to equal parts

Use Layout Weights. Keep in mind that it is important to set layout_width as 0dp on children to make it work as intended.

on parent layout:

Set weightSum of parent Layout as 1 (android:weightSum="1")

on the child layout:

Set layout_width as 0dp (android:layout_width="0dp")
Set layout_weight as 0.5 [half of weight sum fr equal two] (android:layout_weight="0.5")

To split layout to three equal parts:

parent: weightSum 3
child: layout_weight: 1

To split layout to four equal parts:

parent: weightSum 1
child: layout_weight: 0.25

To split layout to n equal parts:

parent: weightSum n

child: layout_weight: 1

Below is an example layout for splitting layout to two equal parts.

<LinearLayout
    android:id="@+id/layout_top"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:weightSum="1">

    <LinearLayout
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="0.5"
        android:orientation="vertical">

        <TextView .. />

        <EditText .../>

    </LinearLayout>

    <LinearLayout
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="0.5"
        android:orientation="vertical">

        <TextView ../>

        <EditText ../>

    </LinearLayout>

</LinearLayout>

How do I authenticate a WebClient request?

You need to give the WebClient object the credentials. Something like this...

 WebClient client = new WebClient();
 client.Credentials = new NetworkCredential("username", "password");

How to change package name in flutter?

Change App Package Name with single command by using following package. It makes the process very easy and fast.

flutter pub run change_app_package_name:main com.new.package.name

https://pub.dev/packages/change_app_package_name

Where do I find old versions of Android NDK?

Simply replacing .bin with .tar.bz2 is not enough, for NDK releases older than 10b. For example, https://dl.google.com/android/ndk/android-ndk-r10b-linux-x86_64.tar.bz2 is not a valid link.

Turned out that the correct link for 10b was: https://dl.google.com/android/ndk/android-ndk32-r10b-linux-x86_64.tar.bz2 (note the additional '32'). However, this doesn't seem to apply to e.g. 10a, as this link doesn't work: https://dl.google.com/android/ndk/android-ndk32-r10a-linux-x86_64.tar.bz2 .

Bottom line: use http://web.archive.org until Google fixes this, if ever...

Subversion stuck due to "previous operation has not finished"?

I tried removing the .svn folder to other location and placed it back in the same root folder. After when I tried to update the SVN, it got updated. I don't know how exactly it worked.

Android - get children inside a View?

You can always access child views via View.findViewById() http://developer.android.com/reference/android/view/View.html#findViewById(int).

For example, within an activity / view:

...
private void init() {
  View child1 = findViewById(R.id.child1);
}
...

or if you have a reference to a view:

...
private void init(View root) {
  View child2 = root.findViewById(R.id.child2);
}

Counting the number of elements with the values of x in a vector

There is a standard function in R for that

tabulate(numbers)

JavaScript Extending Class

For traditional extending you can simply write superclass as constructor function, and then apply this constructor for your inherited class.

     function AbstractClass() {
      this.superclass_method = function(message) {
          // do something
        };
     }

     function Child() {
         AbstractClass.apply(this);
         // Now Child will have superclass_method()
     }

Example on angularjs:

http://plnkr.co/edit/eFixlsgF3nJ1LeWUJKsd?p=preview

app.service('noisyThing', 
  ['notify',function(notify){
    this._constructor = function() {
      this.scream = function(message) {
          message = message + " by " + this.get_mouth();
          notify(message); 
          console.log(message);
        };

      this.get_mouth = function(){
        return 'abstract mouth';
      }
    }
  }])
  .service('cat',
  ['noisyThing', function(noisyThing){
    noisyThing._constructor.apply(this)
    this.meow = function() {
      this.scream('meooooow');
    }
    this.get_mouth = function(){
      return 'fluffy mouth';
    }
  }])
  .service('bird',
  ['noisyThing', function(noisyThing){
    noisyThing._constructor.apply(this)
    this.twit = function() {
      this.scream('fuuuuuuck');
    }
  }])

Mysql: Select rows from a table that are not in another

If you have 300 columns as you mentioned in another comment, and you want to compare on all columns (assuming the columns are all the same name), you can use a NATURAL LEFT JOIN to implicitly join on all matching column names between the two tables so that you don't have to tediously type out all join conditions manually:

SELECT            a.*
FROM              tbl_1 a
NATURAL LEFT JOIN tbl_2 b
WHERE             b.FirstName IS NULL

How to create a file on Android Internal Storage?

You should create the media dir appended to what getLocalPath() returns.

What version of JBoss I am running?

If it helps there is also a jar-versions.xml in my JBoss installation in JBoss root folder. This doesn't require you to wget or jar xvf.

E.g.

$  grep jboss-system.jar /opt/jboss-5.1.0.GA/jar-versions.xml | fold
  <jar name="jboss-system.jar" specVersion="5.1.0.GA" specVendor="JBoss (http://
www.jboss.org/)" specTitle="JBoss" implVersion="5.1.0.GA (build: SVNTag=JBoss_5_
1_0_GA date=200905221634)" implVendor="JBoss Inc." implTitle="JBoss [The Oracle]
" implVendorID="http://www.jboss.org/" implURL="http://www.jboss.org/" sealed="f
alse" md5Digest="c97e8a3dde7433b6c26d723413e17dbc"/>
$

Pressing Ctrl + A in Selenium WebDriver

It works for me:

OpenQA.Selenium.Interactions.Actions action 
    = new OpenQA.Selenium.Interactions.Actions(browser);
action.KeyDown(OpenQA.Selenium.Keys.Control)
    .SendKeys("a").KeyUp(OpenQA.Selenium.Keys.Control).Perform();

How do I count columns of a table

I have a more general answer; but I believe it is useful for counting the columns for all tables in a DB:

SELECT table_name, count(*)
FROM information_schema.columns
GROUP BY table_name;

Generate signed apk android studio

Note: If its a React Native project

If you open the root project folder in Android Studio, you wont see the options suggested in other answers in this page.

Solution

Instead of the root folder I opened the packages/native/android folder. Then only I could see the options to build signed APK.

Add padding on view programmatically

Using Kotlin and the android-ktx library, you can simply do

view.updatePadding(top = 42)

See docs here

Which characters are valid in CSS class names/selectors?

For HTML5/CSS3 classes and IDs can start with numbers.

Change priorityQueue to max priorityqueue

PriorityQueue<Integer> pq = new PriorityQueue<Integer> (
  new Comparator<Integer> () {
    public int compare(Integer a, Integer b) {
       return b - a;
    }
  }
);

What is the difference between C++ and Visual C++?

C++ is a general-purpose programming language. It is regarded as a middle-level language, as it comprises a combination of both high-level and low-level language features. It was developed by Bjarne Stroustrup starting in 1979 at Bell Labs as an enhancement to the C programming language and originally named "C with Classes". It was renamed to C++ in 1983.

C++ is widely used in the software industry. Some of its application domains include systems software, application software, device drivers, embedded software, high-performance server and client applications, and entertainment software such as video games. Several groups provide both free and proprietary C++ compiler software, including the GNU Project, Microsoft, Intel, Borland and others.

Microsoft Visual C++ (often abbreviated as MSVC or VC++) is an integrated development environment (IDE) product from Microsoft for the C, C++, and C++/CLI programming languages. MSVC is proprietary software; it was originally a standalone product but later became a part of Visual Studio and made available in both trialware and freeware forms. It features tools for developing and debugging C++ code, especially code written for Windows API, DirectX and .NET Framework.

So the main difference between them is that they are different things. The former is a programming language, while the latter is a commercial integrated development environment (IDE).

Git with SSH on Windows

I've found my ssh.exe in "C:/Program Files/Git/usr/bin" directory

mySQL :: insert into table, data from another table?

Answered by zerkms is the correct method. But, if someone looking to insert more extra column in the table then you can get it from the following:

INSERT INTO action_2_members (`campaign_id`, `mobile`, `email`, `vote`, `vote_date`, `current_time`)
SELECT `campaign_id`, `from_number`, '[email protected]', `received_msg`, `date_received`, 1502309889 FROM `received_txts` WHERE `campaign_id` = '8'

In the above query, there are 2 extra columns named email & current_time.

Convert INT to FLOAT in SQL

In oracle db there is a trick for casting int to float (I suppose, it should also work in mysql):

select myintfield + 0.0 as myfloatfield from mytable

While @Heximal's answer works, I don't personally recommend it.

This is because it uses implicit casting. Although you didn't type CAST, either the SUM() or the 0.0 need to be cast to be the same data-types, before the + can happen. In this case the order of precedence is in your favour, and you get a float on both sides, and a float as a result of the +. But SUM(aFloatField) + 0 does not yield an INT, because the 0 is being implicitly cast to a FLOAT.

I find that in most programming cases, it is much preferable to be explicit. Don't leave things to chance, confusion, or interpretation.

If you want to be explicit, I would use the following.

CAST(SUM(sl.parts) AS FLOAT) * cp.price
-- using MySQL CAST FLOAT  requires 8.0

I won't discuss whether NUMERIC or FLOAT *(fixed point, instead of floating point)* is more appropriate, when it comes to rounding errors, etc. I'll just let you google that if you need to, but FLOAT is so massively misused that there is a lot to read about the subject already out there.

You can try the following to see what happens...

CAST(SUM(sl.parts) AS NUMERIC(10,4)) * CAST(cp.price AS NUMERIC(10,4))

In Ruby, how do I skip a loop in a .each loop, similar to 'continue'

next - it's like return, but for blocks! (So you can use this in any proc/lambda too.)

That means you can also say next n to "return" n from the block. For instance:

puts [1, 2, 3].map do |e|
  next 42 if e == 2
  e
end.inject(&:+)

This will yield 46.

Note that return always returns from the closest def, and never a block; if there's no surrounding def, returning is an error.

Using return from within a block intentionally can be confusing. For instance:

def my_fun
  [1, 2, 3].map do |e|
    return "Hello." if e == 2
    e
  end
end

my_fun will result in "Hello.", not [1, "Hello.", 2], because the return keyword pertains to the outer def, not the inner block.

How to display table data more clearly in oracle sqlplus

I usually start with something like:

set lines 256
set trimout on
set tab off

Have a look at help set if you have the help information installed. And then select name,address rather than select * if you really only want those two columns.

How do I change an HTML selected option using JavaScript?

Change

document.getElementById('personlist').getElementsByTagName('option')[11].selected = 'selected'

document.getElementById('personlist').value=Person_ID;

What range of values can integer types store in C++

You should look at the specialisations of the numeric_limits<> template for a given type. Its in the header.

Python constructor and default value

Mutable default arguments don't generally do what you want. Instead, try this:

class Node:
     def __init__(self, wordList=None, adjacencyList=None):
        if wordList is None:
            self.wordList = []
        else:
             self.wordList = wordList 
        if adjacencyList is None:
            self.adjacencyList = []
        else:
             self.adjacencyList = adjacencyList

package android.support.v4.app does not exist ; in Android studio 0.8

Ok, so I had the same problem and found a solution in a udacity forum:

In Android Studio:

Right click on your projects "app" folder and click on -> module settings
Click on the "dependencies" tab
Click on the + sign to add a new dependency and select "Library Dependency"
Look for the library you need and add it

Razor/CSHTML - Any Benefit over what we have?

The biggest benefit is that the code is more succinct. The VS editor will also have the IntelliSense support that some of the other view engines don't have.

Declarative HTML Helpers also look pretty cool as doing HTML helpers within C# code reminds me of custom controls in ASP.NET. I think they took a page from partials but with the inline code.

So some definite benefits over the asp.net view engine.

With contrast to a view engine like spark though:

Spark is still more succinct, you can keep the if's and loops within a html tag itself. The markup still just feels more natural to me.

You can code partials exactly how you would do a declarative helper, you'd just pass along the variables to the partial and you have the same thing. This has been around with spark for quite awhile.

C# adding a character in a string

Inserting Space in emailId field after every 8 characters

public string BreakEmailId(string emailId) {
    string returnVal = string.Empty;
    if (emailId.Length > 8) {           
        for (int i = 0; i < emailId.Length; i += 8) {
            returnVal += emailId.Substring(i, 8) + " ";
        }
    }

    return returnVal;
}

Disable Pinch Zoom on Mobile Web

IE has its own way: A css property, -ms-content-zooming. Setting it to none on the body or something should disable it.

Disable pinch to zoom in IE10

http://msdn.microsoft.com/en-us/library/ie/hh771891(v=vs.85).aspx

React Native - Image Require Module using Dynamic Names

This is covered in the documentation under the section "Static Resources":

The only allowed way to refer to an image in the bundle is to literally write require('image!name-of-the-asset') in the source.

// GOOD
<Image source={require('image!my-icon')} />

// BAD
var icon = this.props.active ? 'my-icon-active' : 'my-icon-inactive';
<Image source={require('image!' + icon)} />

// GOOD
var icon = this.props.active ? require('image!my-icon-active') : require('image!my-icon-inactive');
<Image source={icon} />

However you also need to remember to add your images to an xcassets bundle in your app in Xcode, though it seems from your comment you've done that already.

http://facebook.github.io/react-native/docs/image.html#adding-static-resources-to-your-app-using-images-xcassets

jQuery .ready in a dynamically inserted iframe

This was the exact issue I ran into with our client. I created a little jquery plugin that seems to work for iframe readiness. It uses polling to check the iframe document readyState combined with the inner document url combined with the iframe source to make sure the iframe is in fact "ready".

The issue with "onload" is that you need access to the actual iframe being added to the DOM, if you don't then you need to try to catch the iframe loading which if it is cached then you may not. What I needed was a script that could be called anytime, and determine whether or not the iframe was "ready" or not.

Here's the question:

Holy grail for determining whether or not local iframe has loaded

and here's the jsfiddle I eventually came up with.

https://jsfiddle.net/q0smjkh5/10/

In the jsfiddle above, I am waiting for onload to append an iframe to the dom, then checking iframe's inner document's ready state - which should be cross domain because it's pointed to wikipedia - but Chrome seems to report "complete". The plug-in's iready method then gets called when the iframe is in fact ready. The callback tries to check the inner document's ready state again - this time reporting a cross domain request (which is correct) - anyway it seems to work for what I need and hope it helps others.

<script>
  (function($, document, undefined) {
    $.fn["iready"] = function(callback) {
      var ifr = this.filter("iframe"),
          arg = arguments,
          src = this,
          clc = null, // collection
          lng = 50,   // length of time to wait between intervals
          ivl = -1,   // interval id
          chk = function(ifr) {
            try {
              var cnt = ifr.contents(),
                  doc = cnt[0],
                  src = ifr.attr("src"),
                  url = doc.URL;
              switch (doc.readyState) {
                case "complete":
                  if (!src || src === "about:blank") {
                    // we don't care about empty iframes
                    ifr.data("ready", "true");
                  } else if (!url || url === "about:blank") {
                    // empty document still needs loaded
                    ifr.data("ready", undefined);
                  } else {
                    // not an empty iframe and not an empty src
                    // should be loaded
                    ifr.data("ready", true);
                  }

                  break;
                case "interactive":
                  ifr.data("ready", "true");
                  break;
                case "loading":
                default:
                  // still loading
                  break;   
              }
            } catch (ignore) {
              // as far as we're concerned the iframe is ready
              // since we won't be able to access it cross domain
              ifr.data("ready", "true");
            }

            return ifr.data("ready") === "true";
          };

      if (ifr.length) {
        ifr.each(function() {
          if (!$(this).data("ready")) {
            // add to collection
            clc = (clc) ? clc.add($(this)) : $(this);
          }
        });
        if (clc) {
          ivl = setInterval(function() {
            var rd = true;
            clc.each(function() {
              if (!$(this).data("ready")) {
                if (!chk($(this))) {
                  rd = false;
                }
              }
            });

            if (rd) {
              clearInterval(ivl);
              clc = null;
              callback.apply(src, arg);
            }
          }, lng);
        } else {
          clc = null;
          callback.apply(src, arg);
        }
      } else {
        clc = null;
        callback.apply(this, arguments);
      }
      return this;
    };
  }(jQuery, document));
</script>

Asynchronous Requests with Python requests

I know this has been closed for a while, but I thought it might be useful to promote another async solution built on the requests library.

list_of_requests = ['http://moop.com', 'http://doop.com', ...]

from simple_requests import Requests
for response in Requests().swarm(list_of_requests):
    print response.content

The docs are here: http://pythonhosted.org/simple-requests/

Generating unique random numbers (integers) between 0 and 'x'

Math.floor(Math.random()*limit)+1

Unit testing private methods in C#

Extract private method to another class, test on that class; read more about SRP principle (Single Responsibility Principle)

It seem that you need extract to the private method to another class; in this should be public. Instead of trying to test on the private method, you should test public method of this another class.

We has the following scenario:

Class A
+ outputFile: Stream
- _someLogic(arg1, arg2)

We need to test the logic of _someLogic; but it seem that Class A take more role than it need(violate the SRP principle); just refactor into two classes

Class A1
    + A1(logicHandler: A2) # take A2 for handle logic
    + outputFile: Stream
Class A2
    + someLogic(arg1, arg2)

In this way someLogic could be test on A2; in A1 just create some fake A2 then inject to constructor to test that A2 is called to the function named someLogic.

How to load/reference a file as a File instance from the classpath

Try getting hold of a URL for your classpath resource:

URL url = this.getClass().getResource("/com/path/to/file.txt")

Then create a file using the constructor that accepts a URI:

File file = new File(url.toURI());

What is the best place for storing uploaded images, SQL database or disk file system?

For auto resizing, try imagemagick... it is used for many major open source content/photo management systems... and I believe that there are some .net extensions for it.

Android TextView Justify Text

I found a way to solve this problem, but this may not be very grace, but the effect is not bad.

Its principle is to replace the spaces of each line to the fixed-width ImageSpan (the color is transparent).

public static void justify(final TextView textView) {

    final AtomicBoolean isJustify = new AtomicBoolean(false);

    final String textString = textView.getText().toString();

    final TextPaint textPaint = textView.getPaint();

    final SpannableStringBuilder builder = new SpannableStringBuilder();

    textView.post(new Runnable() {
        @Override
        public void run() {

            if (!isJustify.get()) {

                final int lineCount = textView.getLineCount();
                final int textViewWidth = textView.getWidth();

                for (int i = 0; i < lineCount; i++) {

                    int lineStart = textView.getLayout().getLineStart(i);
                    int lineEnd = textView.getLayout().getLineEnd(i);

                    String lineString = textString.substring(lineStart, lineEnd);

                    if (i == lineCount - 1) {
                        builder.append(new SpannableString(lineString));
                        break;
                    }

                    String trimSpaceText = lineString.trim();
                    String removeSpaceText = lineString.replaceAll(" ", "");

                    float removeSpaceWidth = textPaint.measureText(removeSpaceText);
                    float spaceCount = trimSpaceText.length() - removeSpaceText.length();

                    float eachSpaceWidth = (textViewWidth - removeSpaceWidth) / spaceCount;

                    SpannableString spannableString = new SpannableString(lineString);
                    for (int j = 0; j < trimSpaceText.length(); j++) {
                        char c = trimSpaceText.charAt(j);
                        if (c == ' ') {
                            Drawable drawable = new ColorDrawable(0x00ffffff);
                            drawable.setBounds(0, 0, (int) eachSpaceWidth, 0);
                            ImageSpan span = new ImageSpan(drawable);
                            spannableString.setSpan(span, j, j + 1, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
                        }
                    }

                    builder.append(spannableString);
                }

                textView.setText(builder);
                isJustify.set(true);
            }
        }
    });
}

I put the code on GitHub: https://github.com/twiceyuan/TextJustification

Overview:

Select a random sample of results from a query result

SELECT  *
FROM    (
        SELECT  *
        FROM    mytable
        ORDER BY
                dbms_random.value
        )
WHERE rownum <= 1000

Convert nested Python dict to object?

Here is another way to implement SilentGhost's original suggestion:

def dict2obj(d):
  if isinstance(d, dict):
    n = {}
    for item in d:
      if isinstance(d[item], dict):
        n[item] = dict2obj(d[item])
      elif isinstance(d[item], (list, tuple)):
        n[item] = [dict2obj(elem) for elem in d[item]]
      else:
        n[item] = d[item]
    return type('obj_from_dict', (object,), n)
  else:
    return d

How to save a plot as image on the disk?

For the first question, I find dev.print to be the best when working interactively. First, you set up your plot visually and when you are happy with what you see, you can ask R to save the current plot to disk

dev.print(pdf, file="filename.pdf");

You can replace pdf with other formats such as png.

This will copy the image exactly as you see it on screen. The problem with dev.copy is that the image is often different and doesn't remember the window size and aspect ratio - it forces the plot to be square by default.

For the second question, (as others have already answered), you must direct the output to disk before you execute your plotting commands

pdf('filename.pdf')
plot( yourdata )
points (some_more_data)
dev.off() # to complete the writing process and return output to your monitor

How do I get list of all tables in a database using TSQL?

Using SELECT * FROM INFORMATION_SCHEMA.COLUMNS also shows you all tables and related columns.

C# how to create a Guid value?

If you want to create a "desired" Guid you can do

var tempGuid = Guid.Parse("<guidValue>");

where <guidValue> would be something like 1A3B944E-3632-467B-A53A-206305310BAE.

Making a <button> that's a link in HTML

<a href="#"><button>Link Text</button></a>

You asked for a link that looks like a button, so use a link and a button :-) This will preserve default browser button styling. The button by itself does nothing, but clicking it activates its parent link.

Demo:

_x000D_

<a href="http://stackoverflow.com"><button>Link Text</button></a>

_x000D_

TS1086: An accessor cannot be declared in ambient context

I was working on a fresh project and got the similar type of problem. I just ran ng update --all and my problem was solved.

Android sqlite how to check if a record exists

Raw queries are more vulnerable to SQL Injection. I will suggest using query() method instead.

public boolean Exists(String searchItem) {

    String[] columns = { COLUMN_NAME };
    String selection = COLUMN_NAME + " =?";
    String[] selectionArgs = { searchItem };
    String limit = "1";

    Cursor cursor = db.query(TABLE_NAME, columns, selection, selectionArgs, null, null, null, limit);
    boolean exists = (cursor.getCount() > 0);
    cursor.close();
    return exists;
}

Source: here

REST API Best practice: How to accept list of parameter values as input

You might want to check out RFC 6570. This URI Template spec shows many examples of how urls can contain parameters.

Is arr.len() the preferred way to get the length of an array in Python?

you can use len(arr) as suggested in previous answers to get the length of the array. In case you want the dimensions of a 2D array you could use arr.shape returns height and width

Getting HTTP headers with Node.js

Try to look at http.get and response headers.

var http = require("http");

var options = {
  host: 'stackoverflow.com',
  port: 80,
  path: '/'
};

http.get(options, function(res) {
  console.log("Got response: " + res.statusCode);

  for(var item in res.headers) {
    console.log(item + ": " + res.headers[item]);
  }
}).on('error', function(e) {
  console.log("Got error: " + e.message);
});

Scatter plot with error bars

First of all: it is very unfortunate and surprising that R cannot draw error bars "out of the box".

Here is my favourite workaround, the advantage is that you do not need any extra packages. The trick is to draw arrows (!) but with little horizontal bars instead of arrowheads (!!!). This not-so-straightforward idea comes from the R Wiki Tips and is reproduced here as a worked-out example.

Let's assume you have a vector of "average values" avg and another vector of "standard deviations" sdev, they are of the same length n. Let's make the abscissa just the number of these "measurements", so x <- 1:n. Using these, here come the plotting commands:

plot(x, avg,
    ylim=range(c(avg-sdev, avg+sdev)),
    pch=19, xlab="Measurements", ylab="Mean +/- SD",
    main="Scatter plot with std.dev error bars"
)
# hack: we draw arrows but with very special "arrowheads"
arrows(x, avg-sdev, x, avg+sdev, length=0.05, angle=90, code=3)

The result looks like this:

example scatter plot with std.dev error bars

In the arrows(...) function length=0.05 is the size of the "arrowhead" in inches, angle=90 specifies that the "arrowhead" is perpendicular to the shaft of the arrow, and the particularly intuitive code=3 parameter specifies that we want to draw an arrowhead on both ends of the arrow.

For horizontal error bars the following changes are necessary, assuming that the sdev vector now contains the errors in the x values and the y values are the ordinates:

plot(x, y,
    xlim=range(c(x-sdev, x+sdev)),
    pch=19,...)
# horizontal error bars
arrows(x-sdev, y, x+sdev, y, length=0.05, angle=90, code=3)

How to return first 5 objects of Array in Swift?

Update: There is now the possibility to use prefix to get the first n elements of an array. Check @mluisbrown's answer for an explanation how to use prefix.

Original Answer: You can do it really easy without filter, map or reduce by just returning a range of your array:

var wholeArray = [1, 2, 3, 4, 5, 6]
var n = 5

var firstFive = wholeArray[0..<n] // 1,2,3,4,5

Using different Web.config in development and production environment

The <appSettings> tag in web.config supports a file attribute that will load an external config with it's own set of key/values. These will override any settings you have in your web.config or add to them.

We take advantage of this by modifying our web.config at install time with a file attribute that matches the environment the site is being installed to. We do this with a switch on our installer.

eg;

<appSettings file=".\EnvironmentSpecificConfigurations\dev.config">

<appSettings file=".\EnvironmentSpecificConfigurations\qa.config">

<appSettings file=".\EnvironmentSpecificConfigurations\production.config">

Note:

Changes to the .config specified by the attribute won't trigger a restart of the asp.net worker process

Using "-Filter" with a variable

Try this:

$NameRegex = "chalmw-dm"  
$NameR = "$($NameRegex)*"
Get-ADComputer -Filter {name -like $NameR -and Enabled -eq $True}

The simplest way to resize an UIImage?

Swift 2.0 :

let image = UIImage(named: "imageName")
let newSize = CGSize(width: 10, height: 10)

UIGraphicsBeginImageContextWithOptions(newSize, false, 0.0)
image?.drawInRect(CGRectMake(0, 0, newSize.width, newSize.height))
let imageResized = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()

How to check if a windows form is already open, and close it if it is?

This is what I used to close all open forms (except for the main form)

    private void CloseOpenForms()
    {

           // Close all open forms - except for the main form.  (This is usually OpenForms[0].
           // Closing a form decrmements the OpenForms count
           while (Application.OpenForms.Count > 1)
           {
               Application.OpenForms[Application.OpenForms.Count-1].Close();
           }
    }

Replacing blank values (white space) with NaN in pandas

This is not an elegant solution, but what does seem to work is saving to XLSX and then importing it back. The other solutions on this page did not work for me, unsure why.

data.to_excel(filepath, index=False)
data = pd.read_excel(filepath)

Change background color of iframe issue

just building on what Chetabahana wrote, I found that adding a short delay to the JS function helped on a site I was working on. It meant that the function kicked in after the iframe loaded. You can play around with the delay.

var delayInMilliseconds = 500; // half a second

setTimeout(function() { 

   var iframe = document.getElementsByTagName('iframe')[0];
   iframe.style.background = 'white';
   iframe.contentWindow.document.body.style.backgroundColor = 'white';

}, delayInMilliseconds);

I hope this helps!

XPath to fetch SQL XML value

I always go back to this article SQL Server 2005 XQuery and XML-DML - Part 1 to know how to use the XML features in SQL Server 2005.

For basic XPath know-how, I'd recommend the W3Schools tutorial.

Concatenate two NumPy arrays vertically

Because both a and b have only one axis, as their shape is (3), and the axis parameter specifically refers to the axis of the elements to concatenate.

this example should clarify what concatenate is doing with axis. Take two vectors with two axis, with shape (2,3):

a = np.array([[1,5,9], [2,6,10]])
b = np.array([[3,7,11], [4,8,12]])

concatenates along the 1st axis (rows of the 1st, then rows of the 2nd):

np.concatenate((a,b), axis=0)
array([[ 1,  5,  9],
       [ 2,  6, 10],
       [ 3,  7, 11],
       [ 4,  8, 12]])

concatenates along the 2nd axis (columns of the 1st, then columns of the 2nd):

np.concatenate((a, b), axis=1)
array([[ 1,  5,  9,  3,  7, 11],
       [ 2,  6, 10,  4,  8, 12]])

to obtain the output you presented, you can use vstack

a = np.array([1,2,3])
b = np.array([4,5,6])
np.vstack((a, b))
array([[1, 2, 3],
       [4, 5, 6]])

You can still do it with concatenate, but you need to reshape them first:

np.concatenate((a.reshape(1,3), b.reshape(1,3)))
array([[1, 2, 3],
       [4, 5, 6]])

Finally, as proposed in the comments, one way to reshape them is to use newaxis:

np.concatenate((a[np.newaxis,:], b[np.newaxis,:]))

Gson library in Android Studio

Use gradle dependencies to get the Gson in your project. Your application build.gradle should look like this-

dependencies {
  implementation 'com.google.code.gson:gson:2.8.2'
}

SQL Query - SUM(CASE WHEN x THEN 1 ELSE 0) for multiple columns

I think you should make a subquery to do grouping. In this case inner subquery returns few rows and you don't need a CASE statement. So I think this is going to be faster:

select Detail.ReceiptDate AS 'DATE',
       SUM(TotalMailed),
       SUM(TotalReturnMail),
       SUM(TraceReturnedMail)

from
(

select SentDate AS 'ReceiptDate', 
       count('TotalMailed') AS TotalMailed, 
       0 as TotalReturnMail, 
       0 as TraceReturnedMail
from MailDataExtract
where sentdate is not null
GROUP BY SentDate

UNION ALL
select MDE.ReturnMailDate AS 'ReceiptDate', 
       0 AS TotalMailed, 
       count(TotalReturnMail) as TotalReturnMail, 
       0 as TraceReturnedMail
from MailDataExtract MDE
where MDE.ReturnMailDate is not null
GROUP BY  MDE.ReturnMailDate

UNION ALL

select MDE.ReturnMailDate AS 'ReceiptDate', 
       0 AS TotalMailed, 
       0 as TotalReturnMail, 
       count(TraceReturnedMail) as TraceReturnedMail

from MailDataExtract MDE
    inner join DTSharedData.dbo.ScanData SD 
        ON SD.ScanDataID = MDE.ReturnScanDataID
   where MDE.ReturnMailDate is not null AND SD.ReturnMailTypeID = 1
GROUP BY MDE.ReturnMailDate

) as Detail
GROUP BY Detail.ReceiptDate
ORDER BY 1

How do you clear the focus in javascript?

None of the answers provided here are completely correct when using TypeScript, as you may not know the kind of element that is selected.

This would therefore be preferred:

if (document.activeElement instanceof HTMLElement)
    document.activeElement.blur();

I would furthermore discourage using the solution provided in the accepted answer, as the resulting blurring is not part of the official spec, and could break at any moment.

What is the best way to get the minimum or maximum value from an Array of numbers?

This depends on real world application requirements.

If your question is merely hypothetical, then the basics have already been explained. It is a typical search vs. sort problem. It has already been mentioned that algorithmically you are not going to achieve better than O(n) for that case.

However, if you are looking at practical use, things get more interesting. You would then need to consider how large the array is, and the processes involved in adding and removing from the data set. In these cases, it can be best to take the computational 'hit' at insertion / removal time by sorting on the fly. Insertions into a pre-sorted array are not that expensive.

The quickest query response to the Min Max request will always be from a sorted array, because as others have mentioned, you simply take the first or last element - giving you an O(1) cost.

For a bit more of a technical explanation on the computational costs involved, and Big O notation, check out the Wikipedia article here.

Nick.

Longer object length is not a multiple of shorter object length?

Yes, this is something that you should worry about. Check the length of your objects with nrow(). R can auto-replicate objects so that they're the same length if they differ, which means you might be performing operations on mismatched data.

In this case you have an obvious flaw in that your subtracting aggregated data from raw data. These will definitely be of different lengths. I suggest that you merge them as time series (using the dates), then locf(), then do your subtraction. Otherwise merge them by truncating the original dates to the same interval as the aggregated series. Just be very careful that you don't drop observations.

Lastly, as some general advice as you get started: look at the result of your computations to see if they make sense. You might even pull them into a spreadsheet and replicate the results.

Android transparent status bar and actionbar

Just add these lines of code to your activity/fragment java file:

getWindow().setFlags(
    WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS,
    WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS
);

Programmatically relaunch/recreate an activity?

The way I resolved it is by using Fragments. These are backwards compatible until API 4 by using the support library.

You make a "wrapper" layout with a FrameLayout in it.

Example:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:orientation="vertical" >

     <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
          android:id="@+id/fragment_container"
          android:layout_width="match_parent"
          android:layout_height="match_parent" />
</LinearLayout>

Then you make a FragmentActivity in wich you can replace the FrameLayout any time you want.

Example:

public class SampleFragmentActivity extends FragmentActivity
{

     @Override
 public void onCreate(Bundle savedInstanceState)
 {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.wrapper);

    // Check that the activity is using the layout version with
    // the fragment_container FrameLayout
    if (findViewById(R.id.fragment_container) != null)
    {

        // However, if we're being restored from a previous state,
        // then we don't need to do anything and should return or else
        // we could end up with overlapping fragments.
        if (savedInstanceState != null)
        {
            return;
        }
        updateLayout();
     }
  }

  private void updateLayout()
  {
     Fragment fragment = new SampleFragment();
     fragment.setArguments(getIntent().getExtras());

     // replace original fragment by new fragment
     getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container, fragment).commit();
  }

In the Fragment you inflate/replace you can use the onStart and onCreateView like you normaly would use the onCreate of an activity.

Example:

public class SampleFragment extends Fragment
{

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
    {
        return inflater.inflate(R.layout.yourActualLayout, container, false);
    }

    @Override
    public void onStart()
    {
        // do something with the components, or not!
        TextView text = (TextView) getActivity().findViewById(R.id.text1);

        super.onStart();
    }
}

Plotting categorical data with pandas and matplotlib

You can simply use value_counts with sort option set to False. This will preserve ordering of the categories

df['colour'].value_counts(sort=False).plot.bar(rot=0)

How can I initialize a C# List in the same line I declare it. (IEnumerable string Collection Example)

I think this will work for int, long and string values.

List<int> list = new List<int>(new int[]{ 2, 3, 7 });


var animals = new List<string>() { "bird", "dog" };

Adding event listeners to dynamically added elements using jQuery

When adding new element with jquery plugin calls, you can do like the following:

$('<div>...</div>').hoverCard(function(){...}).appendTo(...)

Adding onClick event dynamically using jQuery

try this approach if you know your object client name ( it is not important that it is Button or TextBox )

$('#ButtonName').removeAttr('onclick');
$('#ButtonName').attr('onClick', 'FunctionName(this);');

try this ones if you want add onClick event to a server object with JQuery

$('#' + '<%= ButtonName.ClientID %>').removeAttr('onclick');
$('#' + '<%= ButtonName.ClientID %>').attr('onClick', 'FunctionName(this);');

How to clear Facebook Sharer cache?

I just posted a simple solution that takes 5 seconds here on a related post here - Facebook debugger: Clear whole site cache

short answer... change your permalinks on a worpdress site in the permalinks settings to a custom one. I just added an underscore.
/_%postname%/
then facebook scrapes them all as new urls, new posts.

How to set the maxAllowedContentLength to 500MB while running on IIS7?

The limit of requests in .Net can be configured from two properties together:

First

Web.Config/system.web/httpRuntime/maxRequestLength
Unit of measurement: kilobytes
Default value 4096 KB (4 MB)
Max. value 2147483647 KB (2 TB)

Second

Web.Config/system.webServer/security/requestFiltering/requestLimits/maxAllowedContentLength (in bytes)
Unit of measurement: bytes
Default value 30000000 bytes (28.6 MB)
Max. value 4294967295 bytes (4 GB)

References:

Example:

<location path="upl">
   <system.web>
     <!--The default size is 4096 kilobytes (4 MB). MaxValue is 2147483647 KB (2 TB)-->
     <!-- 100 MB in kilobytes -->
     <httpRuntime maxRequestLength="102400" />
   </system.web>
   <system.webServer>
     <security>
       <requestFiltering>          
         <!--The default size is 30000000 bytes (28.6 MB). MaxValue is 4294967295 bytes (4 GB)-->
         <!-- 100 MB in bytes -->
         <requestLimits maxAllowedContentLength="104857600" />
       </requestFiltering>
     </security>
   </system.webServer>
 </location>

PANIC: Cannot find AVD system path. Please define ANDROID_SDK_ROOT (in windows 10)

create environment variable like in the screenshot and make sure to replace with your sdk path in my case it was C:\Users\zeesh\AppData\Local\Android\sdk replace zeesh with your username and make sure to restart android studio to take effect.

Fatal Error: Allowed Memory Size of 134217728 Bytes Exhausted (CodeIgniter + XML-RPC)

The memory allocation for PHP can be adjusted permanently, or temporarily.

Permanently

You can permanently change the PHP memory allocation two ways.

If you have access to your php.ini file, you can edit the value for memory_limit to your desire value.

If you do not have access to your php.ini file (and your webhost allows it), you can override the memory allocation through your .htaccess file. Add php_value memory_limit 128M (or whatever your desired allocation is).

Temporary

You can adjust the memory allocation on the fly from within a PHP file. You simply have the code ini_set('memory_limit', '128M'); (or whatever your desired allocation is). You can remove the memory limit (although machine or instance limits may still apply) by setting the value to "-1".

Difference between Inheritance and Composition

The answer given by @Michael Rodrigues is not correct (I apologize; I'm not able to comment directly), and could lead to some confusion.

Interface implementation is a form of inheritance... when you implement an interface, you're not only inheriting all the constants, you are committing your object to be of the type specified by the interface; it's still an "is-a" relationship. If a car implements Fillable, the car "is-a" Fillable, and can be used in your code wherever you would use a Fillable.

Composition is fundamentally different from inheritance. When you use composition, you are (as the other answers note) making a "has-a" relationship between two objects, as opposed to the "is-a" relationship that you make when you use inheritance.

So, from the car examples in the other questions, if I wanted to say that a car "has-a" gas tank, I would use composition, as follows:

public class Car {

private GasTank myCarsGasTank;

}

Hopefully that clears up any misunderstanding.

Turn on IncludeExceptionDetailInFaults (either from ServiceBehaviorAttribute or from the <serviceDebug> configuration behavior) on the server

It's in the app.config file.

<configuration>
  <system.serviceModel>
    <behaviors>
      <serviceBehaviors>
        <behavior>
          <serviceDebug includeExceptionDetailInFaults="true"/>

php delete a single file in directory

http://php.net/manual/en/function.unlink.php

Unlink can safely remove a single file; just make sure the file you are removing it actually a file and not a directory ('.' or '..')

if (is_file($filepath))
  {
    unlink($filepath);
  }

Determine file creation date in Java

Java nio has options to access creationTime and other meta-data as long as the filesystem provides it. Check this link out

For example(Provided based on @ydaetskcoR's comment):

Path file = ...;
BasicFileAttributes attr = Files.readAttributes(file, BasicFileAttributes.class);

System.out.println("creationTime: " + attr.creationTime());
System.out.println("lastAccessTime: " + attr.lastAccessTime());
System.out.println("lastModifiedTime: " + attr.lastModifiedTime());

Cannot use special principal dbo: Error 15405

This answer doesn't help for SQL databases where SharePoint is connected. db_securityadmin is required for the configuration databases. In order to add db_securityadmin, you will need to change the owner of the database to an administrative account. You can use that account just for dbo roles.

Differences between contentType and dataType in jQuery ajax function

In English:

ContentType: When sending data to the server, use this content type. Default is application/x-www-form-urlencoded; charset=UTF-8, which is fine for most cases.
Accepts: The content type sent in the request header that tells the server what kind of response it will accept in return. Depends on DataType.
DataType: The type of data that you're expecting back from the server. If none is specified, jQuery will try to infer it based on the MIME type of the response. Can be text, xml, html, script, json, jsonp.

How to uninstall pip on OSX?

Since pip is a package, pip uninstall pip Will do it.
EDIT: If that does not work, try sudo -H pip uninstall pip.

Excel - Using COUNTIF/COUNTIFS across multiple sheets/same column

My first post... UDF I managed quickly to compile. Usage: Select 3D range as normal and enclose is into quotation marks like below...

=CountIf3D("'StartSheet:EndSheet'!G16:G878";"Criteria")

Advisably sheets to be adjacent to avoid unanticipated results.

Public Function CountIf3D(SheetstoCount As String, CriteriaToUse As Variant)

     Dim sStarSheet As String, sEndSheet As String, sAddress As String
     Dim lColonPos As Long, lExclaPos As Long, cnt As Long

    lColonPos = InStr(SheetstoCount, ":") 'Finding ':' separating sheets
    lExclaPos = InStr(SheetstoCount, "!") 'Finding '!' separating address from the sheets

    sStarSheet = Mid(SheetstoCount, 2, lColonPos - 2) 'Getting first sheet's name
    sEndSheet = Mid(SheetstoCount, lColonPos + 1, lExclaPos - lColonPos - 2) 'Getting last sheet's name

    sAddress = Mid(SheetstoCount, lExclaPos + 1, Len(SheetstoCount) - lExclaPos) 'Getting address

        cnt = 0
   For i = Sheets(sStarSheet).Index To Sheets(sEndSheet).Index
        cnt = cnt + Application.CountIf(Sheets(i).Range(sAddress), CriteriaToUse)
   Next

   CountIf3D = cnt

End Function

regex pattern to match the end of a string

Use following pattern:

/([^/]+)$

Cannot deserialize the JSON array (e.g. [1,2,3]) into type ' ' because type requires JSON object (e.g. {"name":"value"}) to deserialize correctly

var objResponse1 = 
JsonConvert.DeserializeObject<List<RetrieveMultipleResponse>>(JsonStr);

worked!

Difference between web server, web container and application server

A Web application runs within a Web container of a Web server. The Web container provides the runtime environment through components that provide naming context and life cycle management. Some Web servers may also provide additional services such as security and concurrency control. A Web server may work with an EJB server to provide some of those services. A Web server, however, does not need to be located on the same machine as an EJB server.

Web applications are composed of web components and other data such as HTML pages. Web components can be servlets, JSP pages created with the JavaServer Pages™ technology, web filters, and web event listeners. These components typically execute in a web server and may respond to HTTP requests from web clients. Servlets, JSP pages, and filters may be used to generate HTML pages that are an application’s user interface. They may also be used to generate XML or other format data that is consumed by other application components.

Source: http://www.service-architecture.com/articles/application-servers/j2ee_web_server_or_container.html

Nested jQuery.each() - continue/break

I've used a "breakout" pattern for this:

$(sentences).each(function() {
    var breakout;
    var s = this;
    alert(s);
    $(words).each(function(i) {
        if (s.indexOf(this) > -1)
        {
            alert('found ' + this);
            return breakout = false;
        }
    });
    return breakout;
});

This works nicely to any nesting depth. breakout is a simple flag. It will stay undefined unless and until you set it to false (as I do in my return statement as illustrated above). All you have to do is:

declare it in your outermost closure: var breakout;
add it to your return false statement(s): return breakout = false
return breakout in your outer closure(s).

Not too inelegant, right? ...works for me anyway.

sending email via php mail function goes to spam

Try changing your headers to this:

$headers = "MIME-Version: 1.0" . "\r\n";
$headers .= "Content-type: text/html; charset=iso-8859-1" . "\r\n";
$headers .= "From: [email protected]" . "\r\n" .
"Reply-To: [email protected]" . "\r\n" .
"X-Mailer: PHP/" . phpversion();

For a few reasons.

One of which is the need of a Reply-To and,
The use of apostrophes instead of double-quotes. Those two things in my experience with forms, is usually what triggers a message ending up in the Spam box.

You could also try changing the $from to:

$from = "[email protected]";

EDIT:

See these links I found on the subject https://stackoverflow.com/a/9988544/1415724 and https://stackoverflow.com/a/16717647/1415724 and https://stackoverflow.com/a/9899837/1415724

https://stackoverflow.com/a/5944155/1415724 and https://stackoverflow.com/a/6532320/1415724

Try using the SMTP server of your ISP.

Using this apparently worked for many: X-MSMail-Priority: High

http://www.webhostingtalk.com/showthread.php?t=931932

"My host helped me to enable DomainKeys and SPF Records on my domain and now when I send a test message to my Hotmail address it doesn't end up in Junk. It was actually really easy to enable these settings in cPanel under Email Authentication. I can't believe I never saw that before. It only works with sending through SMTP using phpmailer by the way. Any other way it still is marked as spam."

PHPmailer sending mail to spam in hotmail. how to fix http://pastebin.com/QdQUrfax

Is it possible to animate scrollTop with jQuery?

If you want to move down at the end of the page (so you don't need to scroll down to bottom) , you can use:

$('body').animate({ scrollTop: $(document).height() });

Best way to use multiple SSH private keys on one client

I had run into this issue a while back, when I had two Bitbucket accounts and wanted to had to store separate SSH keys for both. This is what worked for me.

I created two separate ssh configurations as follows.

Host personal.bitbucket.org
    HostName bitbucket.org
    User git
    IdentityFile /Users/username/.ssh/personal
Host work.bitbucket.org
    HostName bitbucket.org
    User git
    IdentityFile /Users/username/.ssh/work

Now when I had to clone a repository from my work account - the command was as follows.

git clone [email protected]:teamname/project.git

I had to modify this command to:

git clone git@**work**.bitbucket.org:teamname/project.git

Similarly the clone command from my personal account had to be modified to

git clone git@personal.bitbucket.org:name/personalproject.git

Refer this link for more information.

How can I use jQuery in Greasemonkey?

Rob's solution is the right one--use @require with the jQuery library and be sure to reinstall your script so the directive gets processed.

One thing I think is worth adding is that you can use jQuery normally once you have included it in your script, except for AJAX methods. By default jQuery looks for XMLHttpRequest, which doesn't exist in the Greasemonkey context. I wrote about a workaround where you create a wrapper for GM_xmlhttpRequest (the Greasemonkey version of XHR) and use jQuery's ajaxSetup() to specify your wrapped version as the default. Once you do this, you can use $.get and $.post as usual.

You may also have problems with jQuery's $.getJSON because it loads JSONP using <script> tags. This leads to errors because jQuery defines the callback function in the scope of the Greasemonkey window, and the loaded scripts looks for the callback in the scope of the main window. Your best bet is to use $.get instead and parse the result with JSON.parse().

How do I specify different layouts for portrait and landscape orientations?

Create a layout-land directory and put the landscape version of your layout XML file in that directory.

How do I use raw_input in Python 3

Probably not the best solution, but before I came here I just made this on the fly to keep working without having a quick break from study.

def raw_input(x):
  input(x)

Then when I run raw_input('Enter your first name: ') on the script I was working on, it captures it as does input() would.

There may be a reason not to do this, that I haven't come across yet!

Form/JavaScript not working on IE 11 with error DOM7011

I had a similar problem on Internet Explorer, and got the same error number. The culprit was an HTML comment. I know it sounds unbelievable, so here is the story.

I saw a series of 6 articles on the Internet. I liked them, so I decided to download the 6 Web-Pages and store them on my Hard Drive. At the top of each page, was a couple of HTML <a> Tags, that would allow you to go to the next article or the previous article. So I changed the href attribute to point to the next folder on my Hard Drive, instead of the next URL on the Internet.

After all of the links had been re-directed, the Browser refused to display any of the Web-Pages when I clicked on the Links. The message in the Console was the Error Number that was mentioned at the top of this page.

However, the real problem was a Comment. Whenever you download a Web-Page using Google Chrome, the Chrome Browser inserts a Comment at the very top of the page that includes the URL of the location that you got the Web-Page from. After I removed the Comment at the top of each one of the 6 Pages, all of the Links worked fine ( although I continued to get the same Error Message in the Console. )

insert a NOT NULL column to an existing table

This worked for me, can also be "borrowed" from the design view, make changes -> right click -> generate change script.

BEGIN TRANSACTION
GO
ALTER TABLE dbo.YOURTABLE ADD
    YOURCOLUMN bit NOT NULL CONSTRAINT DF_YOURTABLE_YOURCOLUMN DEFAULT 0
GO
COMMIT

CSS checkbox input styling

Although CSS does provide a way for you to do the style specific to the checkbox type or another type, there are going to be problems with browsers that do not support this.

I think your only option in this case is going to be to apply classes to your checkboxes.

just add the class="checkbox" to your checkboxes.

Then create that style in your css code.

One thing you could do is this:

main.css

input[type="checkbox"] { /* css code here */ }

ie.css

.checkbox{ /* css code here for ie */ }

Then use the IE specific css include:

<!--[if lt IE 7]>
   <link rel="stylesheet" type="text/css" href="ie.css" />
<![endif]-->

You will still need to add the class for it to work in IE, and it will not work in other non-IE browsers that do not support IE. But it will make your website forward-thinking with css code and as IE gets support, you will be able to remove the ie specific css code and also the css classes from the checkboxes.

How do I collapse sections of code in Visual Studio Code for Windows?

v1.42 is adding some nice refinements to how folds look and function. See https://github.com/microsoft/vscode-docs/blob/vnext/release-notes/v1_42.md#folded-range-highlighting:

Folded Range Highlighting

Folded ranges now are easier to discover thanks to a background color for all folded ranges.

Fold highlight color Theme: Dark+

The feature is controled by the setting editor.foldingHighlight and the color can be customized with the color editor.foldBackground.

"workbench.colorCustomizations": { "editor.foldBackground": "#355000" }

Folding Refinements

Shift + Click on the folding indicator first only folds the inner ranges. Shift + Click again (when all inner ranges are already folded) will also fold the parent. Shift + Click again unfolds all.

When using the Fold command (kb(editor.fold))] on an already folded range, the next unfolded parent range will be folded.

How to delete zero components in a vector in Matlab?

You could use sparse(a), which would return

(1,2) 1

(1,4) 3

This allows you to keep the information about where your non-zero entries used to be.

How using try catch for exception handling is best practice

I can tell you something:

Snippet #1 is not acceptable because it's ignoring exception. (it's swallowing it like nothing happened).

So do not add catch block that do nothing or just rethrows.

Catch block should add some value. For example output message to end user or log error.

Do not use exception for normal flow program logic. For example:

e.g input validation. <- This is not valid exceptional situation, rather you should write method IsValid(myInput); to check whether input item is valid or not.

Design code to avoid exception. For example:

int Parse(string input);

If we pass value that cannot be parsed to int, this method would throw and exception, instead of that we might write something like this:

bool TryParse(string input,out int result); <- this method would return boolean indicating if parse was successfull.

Maybe this is little bit out of scope of this question, but I hope this will help you to make right decisions when it's about try {} catch(){} and exceptions.

UIImageView aspect fit and center

In swift language we can set content mode of UIImage view like following as:

let newImgThumb = UIImageView(frame: CGRect(x: 10, y: 10, width: 100, height: 100))
newImgThumb.contentMode = .scaleAspectFit

did you register the component correctly? For recursive components, make sure to provide the "name" option

Adding my scenario. Just in case someone has similar problem and not able to identify ACTUAL issue.

I was using vue splitpanes.

Previously it required only "Splitpanes", in latest version, they made another "Pane" component (as children of splitpanes).

Now thing is, if you don't register "Pane" component in latest version of splitpanes, it was showing error for "Splitpanes". as below.

[Vue warn]: Unknown custom element: <splitpanes> - did you register the component correctly? For recursive components, make sure to provide the "name" option.

How to retrieve the LoaderException property?

catch (ReflectionTypeLoadException ex)
{        
    foreach (var item in ex.LoaderExceptions)
    {
          MessageBox.Show(item.Message);                    
    }
}

I'm sorry for resurrecting an old thread, but wanted to post a different solution to pull the loader exception (Using the actual ReflectionTypeLoadException) for anybody else to come across this.

How to change href attribute using JavaScript after opening the link in a new window?

Replace

onclick="changeLink();"

onclick="changeLink(); return false;"

to cancel its default action

Escape Character in SQL Server

You can define your escape character, but you can only use it with a LIKE clause.

Example:

SELECT columns FROM table
WHERE column LIKE '%\%%' ESCAPE '\'

Here it will search for % in whole string and this is how one can use ESCAPE identifier in SQL Server.

Thymeleaf: how to use conditionals to dynamically add/remove a CSS class

If you are looking to add or remove class accordingly if the url contains certain params or not .This is what you can do

<a th:href="@{/admin/home}"  th:class="${#httpServletRequest.requestURI.contains('home')} ? 'nav-link active' : 'nav-link'"  >

If the url contains 'home' then active class will be added and vice versa.

Calculating number of full months between two dates in SQL

select case when DATEPART(D,End_dATE) >=DATEPART(D,sTAR_dATE) 
THEN ( case when DATEPART(M,End_dATE) = DATEPART(M,sTAR_dATE) AND DATEPART(YYYY,End_dATE) = DATEPART(YYYY,sTAR_dATE) 
        THEN 0 ELSE DATEDIFF(M,sTAR_dATE,End_dATE)END )
ELSE DATEDIFF(M,sTAR_dATE,End_dATE)-1 END

How to ignore files/directories in TFS for avoiding them to go to central source repository?

It does seem a little cumbersome to ignore files (and folders) in Team Foundation Server. I've found a couple ways to do this (using TFS / Team Explorer / Visual Studio 2008). These methods work with the web site ASP project type, too.

One way is to add a new or existing item to a project (e.g. right click on project, Add Existing Item or drag and drop from Windows explorer into the solution explorer), let TFS process the file(s) or folder, then undo pending changes on the item(s). TFS will unmark them as having a pending add change, and the files will sit quietly in the project and stay out of TFS.

Another way is with the Add Items to Folder command of Source Control Explorer. This launches a small wizard, and on one of the steps you can select items to exclude (although, I think you have to add at least one item to TFS with this method for the wizard to let you continue).

You can even add a forbidden patterns check-in policy (under Team -> Team Project Settings -> Source Control... -> Check-in Policy) to disallow other people on the team from mistakenly checking in certain assets.

Selecting fields from JSON output

Assume you stored that dictionary in a variable called values. To get id in to a variable, do:

idValue = values['criteria'][0]['id']

If that json is in a file, do the following to load it:

import json
jsonFile = open('your_filename.json', 'r')
values = json.load(jsonFile)
jsonFile.close()

If that json is from a URL, do the following to load it:

import urllib, json
f = urllib.urlopen("http://domain/path/jsonPage")
values = json.load(f)
f.close()

To print ALL of the criteria, you could:

for criteria in values['criteria']:
    for key, value in criteria.iteritems():
        print key, 'is:', value
    print ''

How do I update a Tomcat webapp without restarting the entire service?

There are multiple easy ways.

Just touch web.xml of any webapp.

touch /usr/share/tomcat/webapps/<WEBAPP-NAME>/WEB-INF/web.xml

You can also update a particular jar file in WEB-INF/lib and then touch web.xml, rather than building whole war file and deploying it again.

Delete webapps/YOUR_WEB_APP directory, Tomcat will start deploying war within 5 seconds (assuming your war file still exists in webapps folder).
Generally overwriting war file with new version gets redeployed by tomcat automatically. If not, you can touch web.xml as explained above.
Copy over an already exploded "directory" to your webapps folder

Google Script to see if text contains a value

Google Apps Script is javascript, you can use all the string methods...

var grade = itemResponse.getResponse();
if(grade.indexOf("9th")>-1){do something }

You can find doc on many sites, this one for example.

CSS selector for disabled input type="submit"

Does that work in IE6?

No, IE6 does not support attribute selectors at all, cf. CSS Compatibility and Internet Explorer.

You might find How to workaround: IE6 does not support CSS “attribute” selectors worth the read.

EDIT
If you are to ignore IE6, you could do (CSS2.1):

input[type=submit][disabled=disabled],
button[disabled=disabled] {
    ...
}

CSS3 (IE9+):

input[type=submit]:disabled,
button:disabled {
    ...
}

You can substitute [disabled=disabled] (attribute value) with [disabled] (attribute presence).

How to change time in DateTime?

//The fastest way to copy time            

DateTime justDate = new DateTime(2011, 1, 1); // 1/1/2011 12:00:00AM the date you will be adding time to, time ticks = 0
DateTime timeSource = new DateTime(1999, 2, 4, 10, 15, 30); // 2/4/1999 10:15:30AM - time tick = x

justDate = new DateTime(justDate.Date.Ticks + timeSource.TimeOfDay.Ticks);

Console.WriteLine(justDate); // 1/1/2011 10:15:30AM
Console.Read();

SQL Server 2008 - Login failed. The login is from an untrusted domain and cannot be used with Windows authentication

You're not passing any credentials to sqlcmd.exe

So it's trying to authenticate you using the Windows Login credentials, but you mustn't have your SQL Server setup to accept those credentials...

When you were installing it, you would have had to supply a Server Admin password (for the sa account)

Try...

sqlcmd.exe -U sa -P YOUR_PASSWORD -S ".\SQL2008"

for reference, theres more details here...

Define an <img>'s src attribute in CSS

After trying these solutions I still wasn't satisfied but I found a solution in this article and it works in Chrome, Firefox, Opera, Safari, IE8+

#divId {

  display: block;
  -moz-box-sizing: border-box;
  box-sizing: border-box;
  background: url(http://notrealdomain2.com/newbanner.png) no-repeat;
  width: 180px; /* Width of new image */
  height: 236px; /* Height of new image */
  padding-left: 180px; /* Equal to width of new image */

}

How to insert data into SQL Server

string saveStaff = "INSERT into student (stud_id,stud_name) " + " VALUES ('" + SI+ "', '" + SN + "');";
cmd = new SqlCommand(saveStaff,con);
cmd.ExecuteNonQuery();

CSS: how to add white space before element's content?

You can use the unicode of a non breaking space :

p:before { content: "\00a0 "; }

See JSfiddle demo

[style improved by @Jason Sperske]

How to add \newpage in Rmarkdown in a smart way?

You can make the pagebreak conditional on knitting to PDF. This worked for me.

```{r, results='asis', eval=(opts_knit$get('rmarkdown.pandoc.to') == 'latex')}
cat('\\pagebreak')
```

How to prevent a click on a '#' link from jumping to top of page?

I use something like this:

<a href="#null" class="someclass">Text</a>

How to loop through elements of forms with JavaScript?

You need to get a reference of your form, and after that you can iterate the elements collection. So, assuming for instance:

<form method="POST" action="submit.php" id="my-form">
  ..etc..
</form>

You will have something like:

var elements = document.getElementById("my-form").elements;

for (var i = 0, element; element = elements[i++];) {
    if (element.type === "text" && element.value === "")
        console.log("it's an empty textfield")
}

Notice that in browser that would support querySelectorAll you can also do something like:

var elements = document.querySelectorAll("#my-form input[type=text][value='']")

And you will have in elements just the element that have an empty value attribute. Notice however that if the value is changed by the user, the attribute will be remain the same, so this code is only to filter by attribute not by the object's property. Of course, you can also mix the two solution:

var elements = document.querySelectorAll("#my-form input[type=text]")

for (var i = 0, element; element = elements[i++];) {
    if (element.value === "")
        console.log("it's an empty textfield")
}

You will basically save one check.

How do I do logging in C# without using 3rd party libraries?

I used to write my own error logging until I discovered ELMAH. I've never been able to get the emailing part down quite as perfectly as ELMAH does.

How to select option in drop down using Capybara

It is not a direct answer, but you can (if your server permit):

1) Create a model for your Organization; extra: It will be easier to populate your HTML.

2) Create a factory (FactoryGirl) for your model;

3) Create a list (create_list) with the factory;

4) 'pick' (sample) a Organization from the list with:

# Random select
option = Organization.all.sample 

# Select the FIRST(0) by id
option = Organization.all[0] 

# Select the SECOND(1) after some restriction
option = Organization.where(some_attr: some_value)[2]
option = Organization.where("some_attr OP some_value")[2] #OP is "=", "<", ">", so on...

HTML form input tag name element array with JavaScript

Try this something like this:

var p_ids = document.forms[0].elements["p_id[]"];
alert(p_ids.length);
for (var i = 0, len = p_ids.length; i < len; i++) {
  alert(p_ids[i].value);
}

compareTo with primitives -> Integer / int

May I propose a third

((Integer) a).compareTo(b)

Color text in discord

Discord doesn't allow colored text. Though, currently, you have two options to "mimic" colored text.

Option #1 (Markdown code-blocks)

Discord supports Markdown and uses highlight.js to highlight code-blocks. Some programming languages have specific color outputs from highlight.js and can be used to mimic colored output.

To use code-blocks, send a normal message in this format (Which follows Markdown's standard format).

```language
message
```

Languages that currently reproduce nice colors: prolog (red/orange), css (yellow).

Option #2 (Embeds)

Discord now supports Embeds and Webhooks, which can be used to display colored blocks, they also support markdown. For documentation on how to use Embeds, please read your lib's documentation.

(Embed Cheat-sheet)

angular2: how to copy object into another object

As suggested before, the clean way of deep copying objects having nested objects inside is by using lodash's cloneDeep method.

For Angular, you can do it like this:

Install lodash with yarn add lodash or npm install lodash.

In your component, import cloneDeep and use it:

import * as cloneDeep from 'lodash/cloneDeep';
...
clonedObject = cloneDeep(originalObject);

It's only 18kb added to your build, well worth for the benefits.

I've also written an article here, if you need more insight on why using lodash's cloneDeep.

How to resize datagridview control when form resizes

Set the anchor property of the control to hook to all sides of the parent - top, bottom, left, and right.

Creating files in C++

One way to do this is to create an instance of the ofstream class, and use it to write to your file. Here's a link to a website that has some example code, and some more information about the standard tools available with most implementations of C++:

ofstream reference

For completeness, here's some example code:

// using ofstream constructors.
#include <iostream>
#include <fstream>  

std::ofstream outfile ("test.txt");

outfile << "my text here!" << std::endl;

outfile.close();

You want to use std::endl to end your lines. An alternative is using '\n' character. These two things are different, std::endl flushes the buffer and writes your output immediately while '\n' allows the outfile to put all of your output into a buffer and maybe write it later.

Get page title with Selenium WebDriver using Java

You can do it easily by Assertion using Selenium Testng framework.

Steps:

1.Create Firefox browser session

2.Initialize expected title name.

3.Navigate to "www.google.com" [As per you requirement, you can change] and wait for some time (15 seconds) to load the page completely.

4.Get the actual title name using "driver.getTitle()" and store it in String variable.

5.Apply the Assertion like below, Assert.assertTrue(actualGooglePageTitlte.equalsIgnoreCase(expectedGooglePageTitle ),"Page title name not matched or Problem in loading grid");

import org.openqa.selenium.WebDriver;
import org.openqa.selenium.firefox.FirefoxDriver;
import org.testng.Assert;
import org.testng.annotations.Test;
import com.myapplication.Utilty;

public class PageTitleVerification
{   
private static WebDriver driver = new FirefoxDriver();

@Test
public void test01_GooglePageTitleVerify()
{               
driver.navigate().to("https://www.google.com/");
String expectedGooglePageTitle = "Google";      
Utility.waitForElementInDOM(driver, "Google Search", 15);   
//Get page title
String actualGooglePageTitlte=driver.getTitle();
System.out.println("Google page title" + actualGooglePageTitlte);   
//Verify expected page title and actual page title is same  
Assert.assertTrue(actualGooglePageTitlte.equalsIgnoreCase(expectedGooglePageTitle 
),"Page title not matched or Problem in loading url page");     
}
}

import org.openqa.selenium.By;
import org.openqa.selenium.NoSuchElementException;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.support.ui.ExpectedConditions;
import org.openqa.selenium.support.ui.WebDriverWait;

public class Utility {

/*Wait for an element to be present in DOM before specified time (in seconds ) has 
elapsed */
public static void waitForElementInDOM(WebDriver driver,String elementIdentifier, 
long timeOutInSeconds) 
{       
WebDriverWait wait = new WebDriverWait(driver, timeOutInSeconds );
try
{
//this will wait for element to be visible for 15 seconds        
wait.until(ExpectedConditions.visibilityOfElementLocated(By.xpath
(elementIdentifier))); 
}
catch(NoSuchElementException e)
{           
e.printStackTrace();
}           
}
}

About "*.d.ts" in TypeScript

Worked example for a specific case:

Let's say you have my-module that you're sharing via npm.

You install it with npm install my-module

You use it thus:

import * as lol from 'my-module';

const a = lol('abc', 'def');

The module's logic is all in index.js:

module.exports = function(firstString, secondString) {

  // your code

  return result
}

To add typings, create a file index.d.ts:

declare module 'my-module' {
  export default function anyName(arg1: string, arg2: string): MyResponse;
}

interface MyResponse {
  something: number;
  anything: number;
}

Cannot create PoolableConnectionFactory

I encounter same problem when I setup tomcat and mysql server on VirtualBox VM using chef.

in this case, I think true problem is VirtualBox seems to assign non-localhost address to eth0 like

[vagrant@localhost webapps]$ /sbin/ifconfig
eth0      Link encap:Ethernet  HWaddr 08:00:27:60:FC:47
      inet addr:10.0.2.15  Bcast:10.0.2.255  Mask:255.255.255.0

then auto-detection feature of chef's recipe using 10.0.2.15 as mysql server bind address.

so specify bind address for node params of chef's recipe solve problem in my case. I hope this information helps people using chef with vagrant.

{
  "name" : "db",
  "default_attributes" : {
   "mysql" : {
    "bind_address" : "localhost"
    ...
   }

How to force file download with PHP

header("Content-Type: application/octet-stream");
header("Content-Transfer-Encoding: Binary");
header("Content-disposition: attachment; filename=\"file.exe\""); 
echo readfile($url);

is correct

or better one for exe type of files

header("Location: $url");

Extract code country from phone number [libphonenumber]

Use a try catch block like below:

try { 

const phoneNumber = this.phoneUtil.parseAndKeepRawInput(value, this.countryCode);

}catch(e){}

How can I use "." as the delimiter with String.split() in java

You might be interested in the StringTokenizer class. However, the java docs advise that you use the .split method as StringTokenizer is a legacy class.

"Unable to find remote helper for 'https'" during git clone

In my case git --exec-path was pointing to the correct path and git-remote-https existed but didn't have execution permission. So chmod +x git-remote-http fixed the issue.

How to fix "Attempted relative import in non-package" even with init.py

My quick-fix is to add the directory to the path:

import sys
sys.path.insert(0, '../components/')

Setting a log file name to include current date in Log4j

I have created an appender that will do that. http://stauffer.james.googlepages.com/DateFormatFileAppender.java

/*
 * Copyright (C) The Apache Software Foundation. All rights reserved.
 *
 * This software is published under the terms of the Apache Software
 * License version 1.1, a copy of which has been included with this
 * distribution in the LICENSE.txt file.  */

package sps.log.log4j;

import java.io.IOException;
import java.io.File;
import java.text.SimpleDateFormat;
import java.util.Date;

import org.apache.log4j.*;
import org.apache.log4j.helpers.LogLog;
import org.apache.log4j.spi.LoggingEvent;

/**
 * DateFormatFileAppender is a log4j Appender and extends 
 * {@link FileAppender} so each log is 
 * named based on a date format defined in the File property.
 *
 * Sample File: 'logs/'yyyy/MM-MMM/dd-EEE/HH-mm-ss-S'.log'
 * Makes a file like: logs/2004/04-Apr/13-Tue/09-45-15-937.log
 * @author James Stauffer
 */
public class DateFormatFileAppender extends FileAppender {

  /**
   * The default constructor does nothing.
   */
  public DateFormatFileAppender() {
  }

  /**
   * Instantiate a <code>DailyRollingFileAppender</code> and open the
   * file designated by <code>filename</code>. The opened filename will
   * become the ouput destination for this appender.
   */
  public DateFormatFileAppender (Layout layout, String filename) throws IOException {
    super(layout, filename, true);
  }

  private String fileBackup;//Saves the file pattern
  private boolean separate = false;

  public void setFile(String file) {
    super.setFile(file);
    this.fileBackup = getFile();
  }

  /**
   * If true each LoggingEvent causes that file to close and open.
   * This is useful when the file is a pattern that would often
   * produce a different filename.
   */
  public void setSeparate(boolean separate) {
    this.separate = separate;
  }

  protected void subAppend(LoggingEvent event) {
    if(separate) {
        try {//First reset the file so each new log gets a new file.
            setFile(getFile(), getAppend(), getBufferedIO(), getBufferSize());
        } catch(IOException e) {
            LogLog.error("Unable to reset fileName.");
        }
    }
    super.subAppend(event);
  }


  public
  synchronized
  void setFile(String fileName, boolean append, boolean bufferedIO, int bufferSize)
                                                            throws IOException {
    SimpleDateFormat sdf = new SimpleDateFormat(fileBackup);
    String actualFileName = sdf.format(new Date());
    makeDirs(actualFileName);
    super.setFile(actualFileName, append, bufferedIO, bufferSize);
  }

  /**
   * Ensures that all of the directories for the given path exist.
   * Anything after the last / or \ is assumed to be a filename.
   */
  private void makeDirs (String path) {
    int indexSlash = path.lastIndexOf("/");
    int indexBackSlash = path.lastIndexOf("\\");
    int index = Math.max(indexSlash, indexBackSlash);
    if(index > 0) {
        String dirs = path.substring(0, index);
//        LogLog.debug("Making " + dirs);
        File dir = new File(dirs);
        if(!dir.exists()) {
            boolean success = dir.mkdirs();
            if(!success) {
                LogLog.error("Unable to create directories for " + dirs);
            }
        }
    }
  }

}

How to add row of data to Jtable from values received from jtextfield and comboboxes

you can use this code as template please customize it as per your requirement.

DefaultTableModel model = new DefaultTableModel();
List<String> list = new ArrayList<String>();

list.add(textField.getText());
list.add(comboBox.getSelectedItem());

model.addRow(list.toArray());

table.setModel(model);

here DefaultTableModel is used to add rows in JTable, you can get more info here.

Fixed positioning in Mobile Safari

<meta name="viewport" content="width=320, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no"/>

Also making sure height=device-height is not present in this meta tag helps prevent additional footer padding that normally would not exist on the page. The menubar height adds to the viewport height causing a fixed background to become scrollable.

Refresh an asp.net page on button click

That on code behind redirect to the same page.

Response.Redirect(Request.RawUrl);

What's the difference between “mod” and “remainder”?

There is a difference between modulus and remainder. For example:

-21 mod 4 is 3 because -21 + 4 x 6 is 3.

But -21 divided by 4 gives -5 with a remainder of -1.

For positive values, there is no difference.

Programs & Examples On #Multiserver

How to load html string in a webview?

Centering a background image, using CSS

Get Substring between two characters using javascript

How to get the start time of a long-running Linux process?

time delayed redirect?

Code line wrapping - how to handle long lines

Reading from stdin

Razor View Without Layout

Using python's mock patch.object to change the return value of a method called within another method

Do on-demand Mac OS X cloud services exist, comparable to Amazon's EC2 on-demand instances?

How to wait for all threads to finish, using ExecutorService?

How to programmatically click a button in WPF?

Get underlined text with Markdown

VBA - If a cell in column A is not blank the column B equals

WPF global exception handler

Understanding Linux /proc/id/maps

Where Is Machine.Config?

Shell equality operators (=, ==, -eq)

The service cannot accept control messages at this time

Alternative to itoa() for converting integer to string C++?

Exiting out of a FOR loop in a batch file?

Equivalent of Clean & build in Android Studio?

How to convert NUM to INT in R?

Python Key Error=0 - Can't find Dict error in code

Calling Non-Static Method In Static Method In Java

How to Load RSA Private Key From File

Not unique table/alias

Create tap-able "links" in the NSAttributedString of a UILabel?

How do I update an entity using spring-data-jpa?

How can I check if character in a string is a letter? (Python)

Is there a printf converter to print in binary format?

What is Python Whitespace and how does it work?

Intercept and override HTTP requests from WebView

[Ljava.lang.Object; cannot be cast to

Solution

Related link

How to copy part of an array to another array in C#?

How to change Label Value using javascript

what's the default value of char?

How to calculate the time interval between two time strings

How to use PHP to connect to sql server

How do I create a unique constraint that also allows nulls?

How to split comma separated string using JavaScript?

CORS with POSTMAN

Extract digits from string - StringUtils Java

Calculating Waiting Time and Turnaround Time in (non-preemptive) FCFS queue

SimpleXml to string

In Visual Studio Code How do I merge between two local branches?

How to remove a package from Laravel using composer?

ViewPager and fragments — what's the right way to store fragment's state?

The entity name must immediately follow the '&' in the entity reference

PHP compare time

Is there a good reason I see VARCHAR(255) used so often (as opposed to another length)?

How can I extract a predetermined range of lines from a text file on Unix?

How to copy directories in OS X 10.7.3?

Comparing boxed Long values 127 and 128

How to convert int to QString?

Show/Hide the console window of a C# console application

Angularjs loading screen on ajax request

Google API authentication: Not valid origin for the client

Setting the JVM via the command line on Windows

How do I get a file name from a full path with PHP?

How to make a select with array contains value clause in psql

How to split the screen with two equal LinearLayouts?

To Split a layout to equal parts

To split layout to three equal parts:

To split layout to four equal parts:

To split layout to n equal parts:

How do I authenticate a WebClient request?

How to change package name in flutter?

Where do I find old versions of Android NDK?

Subversion stuck due to "previous operation has not finished"?

Android - get children inside a View?

Counting the number of elements with the values of x in a vector

JavaScript Extending Class

Mysql: Select rows from a table that are not in another

How to create a file on Android Internal Storage?

What version of JBoss I am running?

Pressing Ctrl + A in Selenium WebDriver

Is arr.len() the preferred way to get the length of an array in Python?