As other answers describe this pattern is acceptable in python:

def dostuff(self):
     from foo import bar
     ...

Which will avoid the execution of the import statement when the file is imported by other modules. Only if there is a logical circular dependency, this will fail.

Most Circular Imports are not actually logical circular imports but rather raise ImportError errors, because of the way import() evaluates top level statements of the entire file when called.

These ImportErrors can almost always be avoided if you positively want your imports on top:

Consider this circular import:

App A

# profiles/serializers.py

from images.serializers import SimplifiedImageSerializer

class SimplifiedProfileSerializer(serializers.Serializer):
    name = serializers.CharField()

class ProfileSerializer(SimplifiedProfileSerializer):
    recent_images = SimplifiedImageSerializer(many=True)

App B

# images/serializers.py

from profiles.serializers import SimplifiedProfileSerializer

class SimplifiedImageSerializer(serializers.Serializer):
    title = serializers.CharField()

class ImageSerializer(SimplifiedImageSerializer):
    profile = SimplifiedProfileSerializer()

From David Beazleys excellent talk Modules and Packages: Live and Let Die! - PyCon 2015, 1:54:00, here is a way to deal with circular imports in python:

try:
    from images.serializers import SimplifiedImageSerializer
except ImportError:
    import sys
    SimplifiedImageSerializer = sys.modules[__package__ + '.SimplifiedImageSerializer']

This tries to import SimplifiedImageSerializer and if ImportError is raised, because it already is imported, it will pull it from the importcache.

PS: You have to read this entire post in David Beazley's voice.

You can't have a link to SCSS File in your HTML page.You have to compile it down to CSS First. No there are lots of video tutorials you might want to check out. Lynda provides great video tutorials on SASS. there are also free screencasts you can google...

For official documentation visit this site http://sass-lang.com/documentation/file.SASS_REFERENCE.html And why have you chosen notepad to write Sass?? you can easily download some free text editors for better code handling.

-Xmx1024m -XX:MaxPermSize=512m -Xms512m

Add this parameter as argument in your server params

SQL Server does not have literal true or false values. You'll need to use the 1=1 method (or similar) in the rare cases this is needed.

One option is to create your own named variables for true and false

DECLARE @TRUE bit
DECLARE @FALSE bit
SET @TRUE = 1
SET @FALSE = 0

select * from SomeTable where @TRUE = @TRUE

But these will only exist within the scope of the batch (you'll have to redeclare them in every batch in which you want to use them)

The answer is to use Welford's algorithm, which is very clearly defined after the "naive methods" in:

• Wikipedia: Algorithms for calculating variance

It's more numerically stable than either the two-pass or online simple sum of squares collectors suggested in other responses. The stability only really matters when you have lots of values that are close to each other as they lead to what is known as "catastrophic cancellation" in the floating point literature.

You might also want to brush up on the difference between dividing by the number of samples (N) and N-1 in the variance calculation (squared deviation). Dividing by N-1 leads to an unbiased estimate of variance from the sample, whereas dividing by N on average underestimates variance (because it doesn't take into account the variance between the sample mean and the true mean).

I wrote two blog entries on the topic which go into more details, including how to delete previous values online:

• Computing Sample Mean and Variance Online in One Pass
• Deleting Values in Welford’s Algorithm for Online Mean and Variance

You can also take a look at my Java implement; the javadoc, source, and unit tests are all online:

• Javadoc: stats.OnlineNormalEstimator
• Source: stats.OnlineNormalEstimator.java
• JUnit Source: test.unit.stats.OnlineNormalEstimatorTest.java
• LingPipe Home Page

Here is a flexible approach, it can be used in all cases, in particular:

1. to affect only one column, or
2. the dataframe has been obtained from applying previous operations (e.g. not immediately opening a file, or creating a new data frame).

First, un-factorize a string using the as.character function, and, then, re-factorize with the as.factor (or simply factor) function:

fixed <- data.frame("Type" = character(3), "Amount" = numeric(3))

# Un-factorize (as.numeric can be use for numeric values)
#              (as.vector  can be use for objects - not tested)
fixed$Type <- as.character(fixed$Type)
fixed[1, ] <- c("lunch", 100)

# Re-factorize with the as.factor function or simple factor(fixed$Type)
fixed$Type <- as.factor(fixed$Type)

If you already have the figure object use:

f.set_figheight(15)
f.set_figwidth(15)

But if you use the .subplots() command (as in the examples you're showing) to create a new figure you can also use:

f, axs = plt.subplots(2,2,figsize=(15,15))

Give each input a name attribute. Only the clicked input's name attribute will be sent to the server.

<input type="submit" name="publish" value="Publish">
<input type="submit" name="save" value="Save">

And then

<?php
    if (isset($_POST['publish'])) {
        # Publish-button was clicked
    }
    elseif (isset($_POST['save'])) {
        # Save-button was clicked
    }
?>

Edit: Changed value attributes to alt. Not sure this is the best approach for image buttons though, any particular reason you don't want to use input[type=image]?

Edit: Since this keeps getting upvotes I went ahead and changed the weird alt/value code to real submit inputs. I believe the original question asked for some sort of image buttons but there are so much better ways to achieve that nowadays instead of using input[type=image].

OCR which stands for Optical Character Recognition is a computer vision technique used to identify the different types of handwritten digits that are used in common mathematics. To perform OCR in OpenCV we will use the KNN algorithm which detects the nearest k neighbors of a particular data point and then classifies that data point based on the class type detected for n neighbors.

Data Used

This data contains 5000 handwritten digits where there are 500 digits for every type of digit. Each digit is of 20×20 pixel dimensions. We will split the data such that 250 digits are for training and 250 digits are for testing for every class.

Below is the implementation.

Output

91.64

Well, I decided to workout myself on my question to solve the above problem. What I wanted is to implement a simple OCR using KNearest or SVM features in OpenCV. And below is what I did and how. (it is just for learning how to use KNearest for simple OCR purposes).

1) My first question was about letter_recognition.data file that comes with OpenCV samples. I wanted to know what is inside that file.

It contains a letter, along with 16 features of that letter.

And this SOF helped me to find it. These 16 features are explained in the paper Letter Recognition Using Holland-Style Adaptive Classifiers. (Although I didn't understand some of the features at the end)

2) Since I knew, without understanding all those features, it is difficult to do that method. I tried some other papers, but all were a little difficult for a beginner.

So I just decided to take all the pixel values as my features. (I was not worried about accuracy or performance, I just wanted it to work, at least with the least accuracy)

I took the below image for my training data:

(I know the amount of training data is less. But, since all letters are of the same font and size, I decided to try on this).

To prepare the data for training, I made a small code in OpenCV. It does the following things:

1. It loads the image.
2. Selects the digits (obviously by contour finding and applying constraints on area and height of letters to avoid false detections).
3. Draws the bounding rectangle around one letter and wait for key press manually. This time we press the digit key ourselves corresponding to the letter in the box.
4. Once the corresponding digit key is pressed, it resizes this box to 10x10 and saves all 100 pixel values in an array (here, samples) and corresponding manually entered digit in another array(here, responses).
5. Then save both the arrays in separate .txt files.

At the end of the manual classification of digits, all the digits in the training data (train.png) are labeled manually by ourselves, image will look like below:

Below is the code I used for the above purpose (of course, not so clean):

import sys

import numpy as np
import cv2

im = cv2.imread('pitrain.png')
im3 = im.copy()

gray = cv2.cvtColor(im,cv2.COLOR_BGR2GRAY)
blur = cv2.GaussianBlur(gray,(5,5),0)
thresh = cv2.adaptiveThreshold(blur,255,1,1,11,2)

#################      Now finding Contours         ###################

contours,hierarchy = cv2.findContours(thresh,cv2.RETR_LIST,cv2.CHAIN_APPROX_SIMPLE)

samples =  np.empty((0,100))
responses = []
keys = [i for i in range(48,58)]

for cnt in contours:
    if cv2.contourArea(cnt)>50:
        [x,y,w,h] = cv2.boundingRect(cnt)
        
        if  h>28:
            cv2.rectangle(im,(x,y),(x+w,y+h),(0,0,255),2)
            roi = thresh[y:y+h,x:x+w]
            roismall = cv2.resize(roi,(10,10))
            cv2.imshow('norm',im)
            key = cv2.waitKey(0)

            if key == 27:  # (escape to quit)
                sys.exit()
            elif key in keys:
                responses.append(int(chr(key)))
                sample = roismall.reshape((1,100))
                samples = np.append(samples,sample,0)

responses = np.array(responses,np.float32)
responses = responses.reshape((responses.size,1))
print "training complete"

np.savetxt('generalsamples.data',samples)
np.savetxt('generalresponses.data',responses)

Now we enter in to training and testing part.

For the testing part, I used the below image, which has the same type of letters I used for the training phase.

For training we do as follows:

1. Load the .txt files we already saved earlier
2. create an instance of the classifier we are using (it is KNearest in this case)
3. Then we use KNearest.train function to train the data

For testing purposes, we do as follows:

1. We load the image used for testing
2. process the image as earlier and extract each digit using contour methods
3. Draw a bounding box for it, then resize it to 10x10, and store its pixel values in an array as done earlier.
4. Then we use KNearest.find_nearest() function to find the nearest item to the one we gave. ( If lucky, it recognizes the correct digit.)

I included last two steps (training and testing) in single code below:

import cv2
import numpy as np

#######   training part    ############### 
samples = np.loadtxt('generalsamples.data',np.float32)
responses = np.loadtxt('generalresponses.data',np.float32)
responses = responses.reshape((responses.size,1))

model = cv2.KNearest()
model.train(samples,responses)

############################# testing part  #########################

im = cv2.imread('pi.png')
out = np.zeros(im.shape,np.uint8)
gray = cv2.cvtColor(im,cv2.COLOR_BGR2GRAY)
thresh = cv2.adaptiveThreshold(gray,255,1,1,11,2)

contours,hierarchy = cv2.findContours(thresh,cv2.RETR_LIST,cv2.CHAIN_APPROX_SIMPLE)

for cnt in contours:
    if cv2.contourArea(cnt)>50:
        [x,y,w,h] = cv2.boundingRect(cnt)
        if  h>28:
            cv2.rectangle(im,(x,y),(x+w,y+h),(0,255,0),2)
            roi = thresh[y:y+h,x:x+w]
            roismall = cv2.resize(roi,(10,10))
            roismall = roismall.reshape((1,100))
            roismall = np.float32(roismall)
            retval, results, neigh_resp, dists = model.find_nearest(roismall, k = 1)
            string = str(int((results[0][0])))
            cv2.putText(out,string,(x,y+h),0,1,(0,255,0))

cv2.imshow('im',im)
cv2.imshow('out',out)
cv2.waitKey(0)

And it worked, below is the result I got:

Here it worked with 100% accuracy. I assume this is because all the digits are of the same kind and the same size.

But anyway, this is a good start to go for beginners (I hope so).

1. Using O(1) extra space, in O(n log n) time

This is possible, for instance:

• first do an in-place O(n log n) sort
• then walk through the list once, writing the first instance of every back to the beginning of the list

I believe ejel's partner is correct that the best way to do this would be an in-place merge sort with a simplified merge step, and that that is probably the intent of the question, if you were eg. writing a new library function to do this as efficiently as possible with no ability to improve the inputs, and there would be cases it would be useful to do so without a hash-table, depending on the sorts of inputs. But I haven't actually checked this.

2. Using O(lots) extra space, in O(n) time

• declare a zero'd array big enough to hold all integers
• walk through the array once
• set the corresponding array element to 1 for each integer.
• If it was already 1, skip that integer.

This only works if several questionable assumptions hold:

• it's possible to zero memory cheaply, or the size of the ints are small compared to the number of them
• you're happy to ask your OS for 256^sizepof(int) memory
• and it will cache it for you really really efficiently if it's gigantic

It's a bad answer, but if you have LOTS of input elements, but they're all 8-bit integers (or maybe even 16-bit integers) it could be the best way.

3. O(little)-ish extra space, O(n)-ish time

As #2, but use a hash table.

4. The clear way

If the number of elements is small, writing an appropriate algorithm is not useful if other code is quicker to write and quicker to read.

Eg. Walk through the array for each unique elements (ie. the first element, the second element (duplicates of the first having been removed) etc) removing all identical elements. O(1) extra space, O(n^2) time.

Eg. Use library functions which do this. efficiency depends which you have easily available.

In spherical geometry shapes are defined by points, lines and angles between those lines. You have only those rudimentary values to work with.

Therefore a circle (in terms of a a shape projected onto a sphere) is something that must be approximated using points. The more points, the more it'll look like a circle.

Having said that, realize that google maps is projecting the earth onto a flat surface (think "unrolling" the earth and stretching+flattening until it looks "square"). And if you have a flat coordinate system you can draw 2D objects on it all you want.

In other words you can draw a scaled vector circle on a google map. The catch is, google maps doesn't give it to you out of the box (they want to stay as close to GIS values as is pragmatically possible). They only give you GPolygon which they want you to use to approximate a circle. However, this guy did it using vml for IE and svg for other browsers (see "SCALED CIRCLES" section).

Now, going back to your question about Google Latitude using a scaled circle image (and this is probably the most useful to you): if you know the radius of your circle will never change (eg it's always 10 miles around some point), then the easiest solution would be to use a GGroundOverlay, which is just an image url + the GLatLngBounds the image represents. The only work you need to do then is cacluate the GLatLngBounds representing your 10 mile radius. Once you have that, the google maps api handles scaling your image as the user zooms in and out.

I have a case scenario and I tried all the answers from above, but always new image was created on top of the old one. The solution that worked for me is:

imageView.setImageResource(R.drawable.image);

I would really recommend to:

• push only to the main repo

• make sure that main repo is a bare repo, in order to never have any problem with the main repo working tree being not in sync with its .git base. See "How to push a local git repository to another computer?"

• If you do have to make modification in the main (bare) repo, clone it (on the main server), do your modification and push back to it

In other words, keep a bare repo accessible both from the main server and the local computer, in order to have a single upstream repo from/to which to pull/pull.

You need to stringify the json, not calling toString

var buf = Buffer.from(JSON.stringify(obj));

And for converting string to json obj :

var temp = JSON.parse(buf.toString());

An alternative in Python 2.6 or above is to use collections.namedtuple() -- it saves you writing any special methods:

from collections import namedtuple
MyThingBase = namedtuple("MyThingBase", ["name", "location"])
class MyThing(MyThingBase):
    def __new__(cls, name, location, length):
        obj = MyThingBase.__new__(cls, name, location)
        obj.length = length
        return obj

a = MyThing("a", "here", 10)
b = MyThing("a", "here", 20)
c = MyThing("c", "there", 10)
a == b
# True
hash(a) == hash(b)
# True
a == c
# False

window.top.location.href = "http://www.example.com"; 

Will redirect the top most parent Iframe.

window.parent.location.href = "http://www.example.com"; 

Will redirect the parent iframe.

You can try :

DECLARE @counter int
SET @counter = 0
UPDATE [table]
SET [column] = @counter, @counter = @counter + 1```

Either lock or interlocked increment is what you are looking for.

Volatile is definitely not what you're after - it simply tells the compiler to treat the variable as always changing even if the current code path allows the compiler to optimize a read from memory otherwise.

e.g.

while (m_Var)
{ }

if m_Var is set to false in another thread but it's not declared as volatile, the compiler is free to make it an infinite loop (but doesn't mean it always will) by making it check against a CPU register (e.g. EAX because that was what m_Var was fetched into from the very beginning) instead of issuing another read to the memory location of m_Var (this may be cached - we don't know and don't care and that's the point of cache coherency of x86/x64). All the posts earlier by others who mentioned instruction reordering simply show they don't understand x86/x64 architectures. Volatile does not issue read/write barriers as implied by the earlier posts saying 'it prevents reordering'. In fact, thanks again to MESI protocol, we are guaranteed the result we read is always the same across CPUs regardless of whether the actual results have been retired to physical memory or simply reside in the local CPU's cache. I won't go too far into the details of this but rest assured that if this goes wrong, Intel/AMD would likely issue a processor recall! This also means that we do not have to care about out of order execution etc. Results are always guaranteed to retire in order - otherwise we are stuffed!

With Interlocked Increment, the processor needs to go out, fetch the value from the address given, then increment and write it back -- all that while having exclusive ownership of the entire cache line (lock xadd) to make sure no other processors can modify its value.

With volatile, you'll still end up with just 1 instruction (assuming the JIT is efficient as it should) - inc dword ptr [m_Var]. However, the processor (cpuA) doesn't ask for exclusive ownership of the cache line while doing all it did with the interlocked version. As you can imagine, this means other processors could write an updated value back to m_Var after it's been read by cpuA. So instead of now having incremented the value twice, you end up with just once.

Hope this clears up the issue.

For more info, see 'Understand the Impact of Low-Lock Techniques in Multithreaded Apps' - http://msdn.microsoft.com/en-au/magazine/cc163715.aspx

p.s. What prompted this very late reply? All the replies were so blatantly incorrect (especially the one marked as answer) in their explanation I just had to clear it up for anyone else reading this. shrugs

p.p.s. I'm assuming that the target is x86/x64 and not IA64 (it has a different memory model). Note that Microsoft's ECMA specs is screwed up in that it specifies the weakest memory model instead of the strongest one (it's always better to specify against the strongest memory model so it is consistent across platforms - otherwise code that would run 24-7 on x86/x64 may not run at all on IA64 although Intel has implemented similarly strong memory model for IA64) - Microsoft admitted this themselves - http://blogs.msdn.com/b/cbrumme/archive/2003/05/17/51445.aspx.

The Visual jQuery site has some great examples of jQuery's array functionality. (Click "Utilities" on the left-hand tab, and then "Array and Object operations".)

<script>
    var today = new Date;
    document.getElementById('date').innerHTML= today.toDateString();
</script>

Just to add to the other answers, the documentation gives this explanation:

• KEY is normally a synonym for INDEX. The key attribute PRIMARY KEY can also be specified as just KEY when given in a column definition. This was implemented for compatibility with other database systems.

• A UNIQUE index creates a constraint such that all values in the index must be distinct. An error occurs if you try to add a new row with a key value that matches an existing row. For all engines, a UNIQUE index permits multiple NULL values for columns that can contain NULL.

• A PRIMARY KEY is a unique index where all key columns must be defined as NOT NULL. If they are not explicitly declared as NOT NULL, MySQL declares them so implicitly (and silently). A table can have only one PRIMARY KEY. The name of a PRIMARY KEY is always PRIMARY, which thus cannot be used as the name for any other kind of index.

this helped me to fix current issue

If you're using macOS Sierra 10.12.2 or later, you will need to modify your ~/.ssh/config file to automatically load keys into the ssh-agent and store passphrases in your keychain.

Host *
 AddKeysToAgent yes
 UseKeychain yes
 IdentityFile ~/.ssh/id_rsa

source

If (when the file doesn't exist) you want to create it as empty, the simplest approach is

with open(thepath, 'a'): pass

(in Python 2.6 or better; in 2.5, this requires an "import from the future" at the top of your module).

If, on the other hand, you want to leave the file alone if it exists, but put specific non-empty contents there otherwise, then more complicated approaches based on if os.path.isfile(thepath):/else statement blocks are probably more suitable.

$alphas = range('A', 'Z');

I've tried various combinations and had them fail in FireFox. It has been a while so the answer above may work fine or I may have missed something.

What has always worked for me is to add the following to the head of each page, or the template (Master Page in .net).

<script language="javascript" type="text/javascript">
    window.onbeforeunload = function () {   
        // This function does nothing.  It won't spawn a confirmation dialog   
        // But it will ensure that the page is not cached by the browser.
    }  
</script>

This has disabled all caching in all browsers for me without fail.

Using Flexbox:

<style>
  .container {
    display: flex;
    align-items: center; /* Vertical align */
    justify-content: center; /* Horizontal align */
  }
</style>

<div class="container">
  <div class="block"></div>
</div>

Centers block inside container vertically (and horizontally).

Browser support: http://caniuse.com/flexbox

$("#select-id").chosen().val()

You could just style the input element in your css file. That is then independent of ASP.NET.

<form action="">
    Name: <input type="text" class="input" />
    Password: <input type="password" class="input" />
    <input type="submit" value="Submit" class="button" />
</form>
CSS
.input {
    border: 1px solid #006;
    background: #ffc;
}
.button {
    border: 1px solid #006;
    background: #9cf;
}

With the CssClass you can assign the "input" class to it.

Ok, so I tried EVERY suggestion i found here on SO and other forums I nothing worked for me. The only solution, that worked for me was to install MAMP 3 version, since I use MAMP for wordpress projects version 3 works just fine.

As it seems impossible to filter the XPath message data (it isn't in the XML to filter), you can also use powershell to search:

Get-WinEvent -LogName System | Where-Object {$_.Message -like "*recycle*"}

From this, I can see that the event Id for recycling seems to be 5074, so you can filter on this as well. I hope this helps someone as this information seemed to take a lot longer than expected to work out.

This along with @BlackHawkDesign comment should help you find what you need.

I had the same issue. Maybe interesting to mention is that you have to configure in which cases the app pool recycle event is logged. By default it's in a couple of cases, not all of them. You can do that in IIS > app pools > select the app pool > advanced settings > expand generate recycle event log entry – BlackHawkDesign Jan 14 '15 at 10:00

Oh okay, makes sense. So I did this:

    char foo[10] = "hello";
    char padded[16];
    strcpy(padded, foo);
    printf("%s", StringPadRight(padded, 15, " "));

Thanks!

If none of the other answers work for you, it may be because you are binding the ContentProperty of a control in the OnLoad function, which means this won't work:

private void UserControl_Load(object sender, RoutedEventArgs e)
{
  Bind.SetBindingElement(labelName, String.Format("{0:0.00}", PropertyName), Label.ContentProperty) 
}

The solution is simple: there is a ContentStringFormat property in the xaml. So when you create the label do this:

//if you want the decimal places definite
<Label Content="0" Name="labelName" ContentStringFormat="0.00"/>

Or

//if you want the decimal places to be optional
<Label Content="0" Name="labelName" ContentStringFormat="0.##"/>

After Uri.TryCreate you can check Uri.Scheme to see if it HTTP(s).

Use page breaks to define the styles in CSS:

@media all
  {
  #page-one, .footer, .page-break { display:none; }
  }

@media print
  {
  #page-one, .footer, .page-break   
    { 
    display: block;
    color:red; 
    font-family:Arial; 
    font-size: 16px; 
    text-transform: uppercase; 
    }
  .page-break
    {
    page-break-before:always;
    } 
}

Then add the markup in the document at the appropriate places:

<h2 id="page-one">unclassified</h2>
<!-- content block -->
<h2 class="footer">unclassified</h2>
<h2 class="page-break">unclassified</h2>
<!-- content block -->
<h2 class="footer">unclassified</h2>
<h2 class="page-break">unclassified</h2>
<!-- content block -->
<h2 class="footer">unclassified</h2>
<h2 class="page-break">unclassified</h2>
<!-- content block -->
<h2 class="footer">unclassified</h2>
<h2 class="page-break">unclassified</h2>

References

• CSS Paged Media: Page Breaks

• MDN: page-break-before

• MDN: break-before

• Multi-column Layout

• XHTML Print: Second Edition

• Webkit Bug 5097: CSS2 page-break-after does not work

• Print HTML FAQ: Will the program respect CSS styles such as page-break-after?

• How to deal with page breaks when printing a large HTML table

In your IServece.cs add the following tag : BodyStyle = WebMessageBodyStyle.Bare

 [WebInvoke(Method = "GET", ResponseFormat = WebMessageFormat.Json, BodyStyle = WebMessageBodyStyle.Bare, UriTemplate = "Getperson/{id}")]

    List<personClass> Getperson(string id);

I am not sure, but it might be worth running an eval on the commands first.

This will let bash expand the variables $TAR_CMD and such to their full breadth(just as the echo command does to the console, which you say works)

Bash will then read the line a second time with the variables expanded.

eval $TAR_CMD | $ENCRYPT_CMD | $SPLIT_CMD 

I just did a Google search and this page looks like it might do a decent job at explaining why that is needed. http://fvue.nl/wiki/Bash:_Why_use_eval_with_variable_expansion%3F

An alternative approach would involve storing the ranges in a table, instead of embedding them in the query. You would end up with a table, call it Ranges, that looks like this:

LowerLimit   UpperLimit   Range 
0              9          '0-9'
10            19          '10-19'
20            29          '20-29'
30            39          '30-39'

And a query that looks like this:

Select
   Range as [Score Range],
   Count(*) as [Number of Occurences]
from
   Ranges r inner join Scores s on s.Score between r.LowerLimit and r.UpperLimit
group by Range

This does mean setting up a table, but it would be easy to maintain when the desired ranges change. No code changes necessary!

To add a little to this post, I needed to be able to remove software from multiple Servers. I used Jeff's answer to lead me to this:

First I got a list of servers, I used an AD query, but you can provide the array of computer names however you want:

$computers = @("computer1", "computer2", "computer3")

Then I looped through them, adding the -computer parameter to the gwmi query:

foreach($server in $computers){
    $app = Get-WmiObject -Class Win32_Product -computer $server | Where-Object {
        $_.IdentifyingNumber -match "5A5F312145AE-0252130-432C34-9D89-1"
    }
    $app.Uninstall()
}

I used the IdentifyingNumber property to match against instead of name, just to be sure I was uninstalling the correct application.

Try this to remove the first and last bracket of string ex.[1,2,3]

String s =str.replaceAll("[", "").replaceAll("]", "");

Exptected result = 1,2,3

It will be created once you close the file (with or without writing). Use os.path.join() to create your path eg

filepath = os.path.join("c:\\","test.py")

What you are using is not a model dialog, it is a separate window.

Use this code:

private static Object firstHandle;
private static Object lastHandle;

public static void switchToWindowsPopup() {
    Set<String> handles = DriverManager.getCurrent().getWindowHandles();
    Iterator<String> itr = handles.iterator();
    firstHandle = itr.next();
    lastHandle = firstHandle;
    while (itr.hasNext()) {
        lastHandle = itr.next();
    }
    DriverManager.getCurrent().switchTo().window(lastHandle.toString());
}

public static void switchToMainWindow() {
    DriverManager.getCurrent().switchTo().window(firstHandle.toString());

I created an arrayList from it and I somehow can't find a way to store this information into a JTable.

The DefaultTableModel doesn't support displaying custom Objects stored in an ArrayList. You need to create a custom TableModel.

You can check out the Bean Table Model. It is a reusable class that will use reflection to find all the data in your FootballClub class and display in a JTable.

Or, you can extend the Row Table Model found in the above link to make is easier to create your own custom TableModel by implementing a few methods. The JButtomTableModel.java source code give a complete example of how you can do this.

Use the keys CtrlK,C to comment out the line and CtrlK,U to uncomment the line.

I had the same problem and trouble getting it to work on all browsers.

So this is the best font stack for Helvetica Neue Condensed Bold I could find:

font-family: "HelveticaNeue-CondensedBold", "HelveticaNeueBoldCondensed", "HelveticaNeue-Bold-Condensed", "Helvetica Neue Bold Condensed", "HelveticaNeueBold", "HelveticaNeue-Bold", "Helvetica Neue Bold", "HelveticaNeue", "Helvetica Neue", 'TeXGyreHerosCnBold', "Helvetica", "Tahoma", "Geneva", "Arial Narrow", "Arial", sans-serif; font-weight:600; font-stretch:condensed;

Even more stacks to find at:

http://rachaelmoore.name/posts/design/css/web-safe-helvetica-font-stack/

A simple Stream extension method would do the job:

public static class StreamExtensions
{
    public static string ConvertToBase64(this Stream stream)
    {
        var bytes = new Byte[(int)stream.Length];

        stream.Seek(0, SeekOrigin.Begin);
        stream.Read(bytes, 0, (int)stream.Length);

        return Convert.ToBase64String(bytes);
    }
}

The methods for Read (and also Write) and optimized for the respective class (whether is file stream, memory stream, etc.) and will do the work for you. For simple task like this, there is no need of readers, and etc.

The only drawback is that the stream is copied into byte array, but that is how the conversion to base64 via Convert.ToBase64String works unfortunately.

Those CORS headers do not support * as value, the only way is to replace * with this:

Accept, Accept-CH, Accept-Charset, Accept-Datetime, Accept-Encoding, Accept-Ext, Accept-Features, Accept-Language, Accept-Params, Accept-Ranges, Access-Control-Allow-Credentials, Access-Control-Allow-Headers, Access-Control-Allow-Methods, Access-Control-Allow-Origin, Access-Control-Expose-Headers, Access-Control-Max-Age, Access-Control-Request-Headers, Access-Control-Request-Method, Age, Allow, Alternates, Authentication-Info, Authorization, C-Ext, C-Man, C-Opt, C-PEP, C-PEP-Info, CONNECT, Cache-Control, Compliance, Connection, Content-Base, Content-Disposition, Content-Encoding, Content-ID, Content-Language, Content-Length, Content-Location, Content-MD5, Content-Range, Content-Script-Type, Content-Security-Policy, Content-Style-Type, Content-Transfer-Encoding, Content-Type, Content-Version, Cookie, Cost, DAV, DELETE, DNT, DPR, Date, Default-Style, Delta-Base, Depth, Derived-From, Destination, Differential-ID, Digest, ETag, Expect, Expires, Ext, From, GET, GetProfile, HEAD, HTTP-date, Host, IM, If, If-Match, If-Modified-Since, If-None-Match, If-Range, If-Unmodified-Since, Keep-Alive, Label, Last-Event-ID, Last-Modified, Link, Location, Lock-Token, MIME-Version, Man, Max-Forwards, Media-Range, Message-ID, Meter, Negotiate, Non-Compliance, OPTION, OPTIONS, OWS, Opt, Optional, Ordering-Type, Origin, Overwrite, P3P, PEP, PICS-Label, POST, PUT, Pep-Info, Permanent, Position, Pragma, ProfileObject, Protocol, Protocol-Query, Protocol-Request, Proxy-Authenticate, Proxy-Authentication-Info, Proxy-Authorization, Proxy-Features, Proxy-Instruction, Public, RWS, Range, Referer, Refresh, Resolution-Hint, Resolver-Location, Retry-After, Safe, Sec-Websocket-Extensions, Sec-Websocket-Key, Sec-Websocket-Origin, Sec-Websocket-Protocol, Sec-Websocket-Version, Security-Scheme, Server, Set-Cookie, Set-Cookie2, SetProfile, SoapAction, Status, Status-URI, Strict-Transport-Security, SubOK, Subst, Surrogate-Capability, Surrogate-Control, TCN, TE, TRACE, Timeout, Title, Trailer, Transfer-Encoding, UA-Color, UA-Media, UA-Pixels, UA-Resolution, UA-Windowpixels, URI, Upgrade, User-Agent, Variant-Vary, Vary, Version, Via, Viewport-Width, WWW-Authenticate, Want-Digest, Warning, Width, X-Content-Duration, X-Content-Security-Policy, X-Content-Type-Options, X-CustomHeader, X-DNSPrefetch-Control, X-Forwarded-For, X-Forwarded-Port, X-Forwarded-Proto, X-Frame-Options, X-Modified, X-OTHER, X-PING, X-PINGOTHER, X-Powered-By, X-Requested-With

.htaccess Example (CORS Included):

<IfModule mod_headers.c>
  Header unset Connection
  Header unset Time-Zone
  Header unset Keep-Alive
  Header unset Access-Control-Allow-Origin
  Header unset Access-Control-Allow-Headers
  Header unset Access-Control-Expose-Headers
  Header unset Access-Control-Allow-Methods
  Header unset Access-Control-Allow-Credentials

  Header set   Connection                         keep-alive
  Header set   Time-Zone                          "Asia/Jerusalem"
  Header set   Keep-Alive                         timeout=100,max=500
  Header set   Access-Control-Allow-Origin        "*"
  Header set   Access-Control-Allow-Headers       "Accept, Accept-CH, Accept-Charset, Accept-Datetime, Accept-Encoding, Accept-Ext, Accept-Features, Accept-Language, Accept-Params, Accept-Ranges, Access-Control-Allow-Credentials, Access-Control-Allow-Headers, Access-Control-Allow-Methods, Access-Control-Allow-Origin, Access-Control-Expose-Headers, Access-Control-Max-Age, Access-Control-Request-Headers, Access-Control-Request-Method, Age, Allow, Alternates, Authentication-Info, Authorization, C-Ext, C-Man, C-Opt, C-PEP, C-PEP-Info, CONNECT, Cache-Control, Compliance, Connection, Content-Base, Content-Disposition, Content-Encoding, Content-ID, Content-Language, Content-Length, Content-Location, Content-MD5, Content-Range, Content-Script-Type, Content-Security-Policy, Content-Style-Type, Content-Transfer-Encoding, Content-Type, Content-Version, Cookie, Cost, DAV, DELETE, DNT, DPR, Date, Default-Style, Delta-Base, Depth, Derived-From, Destination, Differential-ID, Digest, ETag, Expect, Expires, Ext, From, GET, GetProfile, HEAD, HTTP-date, Host, IM, If, If-Match, If-Modified-Since, If-None-Match, If-Range, If-Unmodified-Since, Keep-Alive, Label, Last-Event-ID, Last-Modified, Link, Location, Lock-Token, MIME-Version, Man, Max-Forwards, Media-Range, Message-ID, Meter, Negotiate, Non-Compliance, OPTION, OPTIONS, OWS, Opt, Optional, Ordering-Type, Origin, Overwrite, P3P, PEP, PICS-Label, POST, PUT, Pep-Info, Permanent, Position, Pragma, ProfileObject, Protocol, Protocol-Query, Protocol-Request, Proxy-Authenticate, Proxy-Authentication-Info, Proxy-Authorization, Proxy-Features, Proxy-Instruction, Public, RWS, Range, Referer, Refresh, Resolution-Hint, Resolver-Location, Retry-After, Safe, Sec-Websocket-Extensions, Sec-Websocket-Key, Sec-Websocket-Origin, Sec-Websocket-Protocol, Sec-Websocket-Version, Security-Scheme, Server, Set-Cookie, Set-Cookie2, SetProfile, SoapAction, Status, Status-URI, Strict-Transport-Security, SubOK, Subst, Surrogate-Capability, Surrogate-Control, TCN, TE, TRACE, Timeout, Title, Trailer, Transfer-Encoding, UA-Color, UA-Media, UA-Pixels, UA-Resolution, UA-Windowpixels, URI, Upgrade, User-Agent, Variant-Vary, Vary, Version, Via, Viewport-Width, WWW-Authenticate, Want-Digest, Warning, Width, X-Content-Duration, X-Content-Security-Policy, X-Content-Type-Options, X-CustomHeader, X-DNSPrefetch-Control, X-Forwarded-For, X-Forwarded-Port, X-Forwarded-Proto, X-Frame-Options, X-Modified, X-OTHER, X-PING, X-PINGOTHER, X-Powered-By, X-Requested-With"
  Header set   Access-Control-Expose-Headers      "Accept, Accept-CH, Accept-Charset, Accept-Datetime, Accept-Encoding, Accept-Ext, Accept-Features, Accept-Language, Accept-Params, Accept-Ranges, Access-Control-Allow-Credentials, Access-Control-Allow-Headers, Access-Control-Allow-Methods, Access-Control-Allow-Origin, Access-Control-Expose-Headers, Access-Control-Max-Age, Access-Control-Request-Headers, Access-Control-Request-Method, Age, Allow, Alternates, Authentication-Info, Authorization, C-Ext, C-Man, C-Opt, C-PEP, C-PEP-Info, CONNECT, Cache-Control, Compliance, Connection, Content-Base, Content-Disposition, Content-Encoding, Content-ID, Content-Language, Content-Length, Content-Location, Content-MD5, Content-Range, Content-Script-Type, Content-Security-Policy, Content-Style-Type, Content-Transfer-Encoding, Content-Type, Content-Version, Cookie, Cost, DAV, DELETE, DNT, DPR, Date, Default-Style, Delta-Base, Depth, Derived-From, Destination, Differential-ID, Digest, ETag, Expect, Expires, Ext, From, GET, GetProfile, HEAD, HTTP-date, Host, IM, If, If-Match, If-Modified-Since, If-None-Match, If-Range, If-Unmodified-Since, Keep-Alive, Label, Last-Event-ID, Last-Modified, Link, Location, Lock-Token, MIME-Version, Man, Max-Forwards, Media-Range, Message-ID, Meter, Negotiate, Non-Compliance, OPTION, OPTIONS, OWS, Opt, Optional, Ordering-Type, Origin, Overwrite, P3P, PEP, PICS-Label, POST, PUT, Pep-Info, Permanent, Position, Pragma, ProfileObject, Protocol, Protocol-Query, Protocol-Request, Proxy-Authenticate, Proxy-Authentication-Info, Proxy-Authorization, Proxy-Features, Proxy-Instruction, Public, RWS, Range, Referer, Refresh, Resolution-Hint, Resolver-Location, Retry-After, Safe, Sec-Websocket-Extensions, Sec-Websocket-Key, Sec-Websocket-Origin, Sec-Websocket-Protocol, Sec-Websocket-Version, Security-Scheme, Server, Set-Cookie, Set-Cookie2, SetProfile, SoapAction, Status, Status-URI, Strict-Transport-Security, SubOK, Subst, Surrogate-Capability, Surrogate-Control, TCN, TE, TRACE, Timeout, Title, Trailer, Transfer-Encoding, UA-Color, UA-Media, UA-Pixels, UA-Resolution, UA-Windowpixels, URI, Upgrade, User-Agent, Variant-Vary, Vary, Version, Via, Viewport-Width, WWW-Authenticate, Want-Digest, Warning, Width, X-Content-Duration, X-Content-Security-Policy, X-Content-Type-Options, X-CustomHeader, X-DNSPrefetch-Control, X-Forwarded-For, X-Forwarded-Port, X-Forwarded-Proto, X-Frame-Options, X-Modified, X-OTHER, X-PING, X-PINGOTHER, X-Powered-By, X-Requested-With"
  Header set   Access-Control-Allow-Methods       "CONNECT, DEBUG, DELETE, DONE, GET, HEAD, HTTP, HTTP/0.9, HTTP/1.0, HTTP/1.1, HTTP/2, OPTIONS, ORIGIN, ORIGINS, PATCH, POST, PUT, QUIC, REST, SESSION, SHOULD, SPDY, TRACE, TRACK"
  Header set   Access-Control-Allow-Credentials   "true"

  Header set DNT "0"
  Header set Accept-Ranges "bytes"
  Header set Vary "Accept-Encoding"
  Header set X-UA-Compatible "IE=edge,chrome=1"
  Header set X-Frame-Options "SAMEORIGIN"
  Header set X-Content-Type-Options "nosniff"
  Header set X-Xss-Protection "1; mode=block"
</IfModule>

F.A.Q:

• Why Access-Control-Allow-Headers, Access-Control-Expose-Headers, Access-Control-Allow-Methods values are super long?

  Those do not support the * syntax, so I've collected the most common (and exotic) headers from around the web, in various formats #1 #2 #3 _{(and I will update the list from time to time)}

• Why do you use Header unset ______ syntax?

  GoDaddy servers (which my website is hosted on..) have a weird bug where if the headers are already set, the previous value will join the existing one.. (instead of replacing it) this way I "pre-clean" existing values _{(really just a a quick && dirty solution)}

• Is it safe for me to use 'as-is'?

  Well.. mostly the answer would be YES since the .htaccess is limiting the headers to the scripts (PHP, HTML, ...) and resources (.JPG, .JS, .CSS) served from the following "folder"-location. You optionally might want to remove the Access-Control-Allow-Methods lines. _{Also Connection, Time-Zone, Keep-Alive and DNT, Accept-Ranges, Vary, X-UA-Compatible, X-Frame-Options, X-Content-Type-Options and X-Xss-Protection are just a suggestion I'm using for my online-service.. feel free to remove those too...}

_{taken from my comment above}

I would use the path npm module and then do something like this:

var path = require('path');
app.use('/scripts', express.static(path.join(__dirname, 'node_modules/bootstrap/dist')));

IMPORTANT: we use path.join to make paths joining using system agnostic way, i.e. on windows and unix we have different path separators (/ and )

You just have to use class="row-eq-height" with your class="row" to get equal height columns for previous bootstrap versions.

but with bootstrap 4 this comes natively.

check this link --http://getbootstrap.com.vn/examples/equal-height-columns/

In PySpark(python) one of the option is to have the column in unix_timestamp format.We can convert string to unix_timestamp and specify the format as shown below. Note we need to import unix_timestamp and lit function

from pyspark.sql.functions import unix_timestamp, lit

df.withColumn("tx_date", to_date(unix_timestamp(df_cast["date"], "MM/dd/yyyy").cast("timestamp")))

Now we can apply the filters

df_cast.filter(df_cast["tx_date"] >= lit('2017-01-01')) \
       .filter(df_cast["tx_date"] <= lit('2017-01-31')).show()

For my case none of the suggested solutions worked so I tried to fix it myself and I got it resolved.

For me I am getting this error on my AWS EC2 UBUNTU instance, what I did to resolve it was to edit the ssh config (or add it if it does not exist).

sudo nano ~/.ssh/config

And I added the following

Host github.com
 Hostname ssh.github.com
 Port 443

Then, run the command ssh -T [email protected] to confirm if the issue is fixed.

According to this

Sometimes, firewalls refuse to allow SSH connections entirely. If using HTTPS cloning with credential caching is not an option, you can attempt to clone using an SSH connection made over the HTTPS port. Most firewall rules should allow this, but proxy servers may interfere

Hopefully this helps anyone else who's having the same issue I did.

In my case after downgrading from .NET 4.5 to .NET 4.0 project was working fine on a local machine, but was failing on server after publishing.

Turns out that destination had some old assemblies, which were still referencing .NET 4.5.

Fixed it by enabling publishing option "Delete all existing files prior to publish"

You go into your router configuration and forward port 80 to the LAN IP of the computer running the web server.

Then anyone outside your network (but not you inside the network) can access your site using your WAN IP address (whatismyipcom).

Python really tries hard to intelligently set sys.path. How it is set can get really complicated. The following guide is a watered-down, somewhat-incomplete, somewhat-wrong, but hopefully-useful guide for the rank-and-file python programmer of what happens when python figures out what to use as the initial values of sys.path, sys.executable, sys.exec_prefix, and sys.prefix on a normal python installation.

First, python does its level best to figure out its actual physical location on the filesystem based on what the operating system tells it. If the OS just says "python" is running, it finds itself in $PATH. It resolves any symbolic links. Once it has done this, the path of the executable that it finds is used as the value for sys.executable, no ifs, ands, or buts.

Next, it determines the initial values for sys.exec_prefix and sys.prefix.

If there is a file called pyvenv.cfg in the same directory as sys.executable or one directory up, python looks at it. Different OSes do different things with this file.

One of the values in this config file that python looks for is the configuration option home = <DIRECTORY>. Python will use this directory instead of the directory containing sys.executable when it dynamically sets the initial value of sys.prefix later. If the applocal = true setting appears in the pyvenv.cfg file on Windows, but not the home = <DIRECTORY> setting, then sys.prefix will be set to the directory containing sys.executable.

Next, the PYTHONHOME environment variable is examined. On Linux and Mac, sys.prefix and sys.exec_prefix are set to the PYTHONHOME environment variable, if it exists, superseding any home = <DIRECTORY> setting in pyvenv.cfg. On Windows, sys.prefix and sys.exec_prefix is set to the PYTHONHOME environment variable, if it exists, unless a home = <DIRECTORY> setting is present in pyvenv.cfg, which is used instead.

Otherwise, these sys.prefix and sys.exec_prefix are found by walking backwards from the location of sys.executable, or the home directory given by pyvenv.cfg if any.

If the file lib/python<version>/dyn-load is found in that directory or any of its parent directories, that directory is set to be to be sys.exec_prefix on Linux or Mac. If the file lib/python<version>/os.py is is found in the directory or any of its subdirectories, that directory is set to be sys.prefix on Linux, Mac, and Windows, with sys.exec_prefix set to the same value as sys.prefix on Windows. This entire step is skipped on Windows if applocal = true is set. Either the directory of sys.executable is used or, if home is set in pyvenv.cfg, that is used instead for the initial value of sys.prefix.

If it can't find these "landmark" files or sys.prefix hasn't been found yet, then python sets sys.prefix to a "fallback" value. Linux and Mac, for example, use pre-compiled defaults as the values of sys.prefix and sys.exec_prefix. Windows waits until sys.path is fully figured out to set a fallback value for sys.prefix.

Then, (what you've all been waiting for,) python determines the initial values that are to be contained in sys.path.

1. The directory of the script which python is executing is added to sys.path. On Windows, this is always the empty string, which tells python to use the full path where the script is located instead.
2. The contents of PYTHONPATH environment variable, if set, is added to sys.path, unless you're on Windows and applocal is set to true in pyvenv.cfg.
3. The zip file path, which is <prefix>/lib/python35.zip on Linux/Mac and os.path.join(os.dirname(sys.executable), "python.zip") on Windows, is added to sys.path.
4. If on Windows and no applocal = true was set in pyvenv.cfg, then the contents of the subkeys of the registry key HK_CURRENT_USER\Software\Python\PythonCore\<DLLVersion>\PythonPath\ are added, if any.
5. If on Windows and no applocal = true was set in pyvenv.cfg, and sys.prefix could not be found, then the core contents of the of the registry key HK_CURRENT_USER\Software\Python\PythonCore\<DLLVersion>\PythonPath\ is added, if it exists;
6. If on Windows and no applocal = true was set in pyvenv.cfg, then the contents of the subkeys of the registry key HK_LOCAL_MACHINE\Software\Python\PythonCore\<DLLVersion>\PythonPath\ are added, if any.
7. If on Windows and no applocal = true was set in pyvenv.cfg, and sys.prefix could not be found, then the core contents of the of the registry key HK_CURRENT_USER\Software\Python\PythonCore\<DLLVersion>\PythonPath\ is added, if it exists;
8. If on Windows, and PYTHONPATH was not set, the prefix was not found, and no registry keys were present, then the relative compile-time value of PYTHONPATH is added; otherwise, this step is ignored.
9. Paths in the compile-time macro PYTHONPATH are added relative to the dynamically-found sys.prefix.
10. On Mac and Linux, the value of sys.exec_prefix is added. On Windows, the directory which was used (or would have been used) to search dynamically for sys.prefix is added.

At this stage on Windows, if no prefix was found, then python will try to determine it by searching all the directories in sys.path for the landmark files, as it tried to do with the directory of sys.executable previously, until it finds something. If it doesn't, sys.prefix is left blank.

Finally, after all this, Python loads the site module, which adds stuff yet further to sys.path:

It starts by constructing up to four directories from a head and a tail part. For the head part, it uses sys.prefix and sys.exec_prefix; empty heads are skipped. For the tail part, it uses the empty string and then lib/site-packages (on Windows) or lib/pythonX.Y/site-packages and then lib/site-python (on Unix and Macintosh). For each of the distinct head-tail combinations, it sees if it refers to an existing directory, and if so, adds it to sys.path and also inspects the newly added path for configuration files.

SQLite database FAQ: How do I drop a SQLite database?

People used to working with other databases are used to having a "drop database" command, but in SQLite there is no similar command. The reason? In SQLite there is no "database server" -- SQLite is an embedded database, and your database is entirely contained in one file. So there is no need for a SQLite drop database command.

To "drop" a SQLite database, all you have to do is delete the SQLite database file you were accessing.

copy from http://alvinalexander.com/android/sqlite-drop-database-how

If you don't have access to sysjobs table (someone elses server etc) you might be have or be allowed access to sysjobs_view

SELECT *
 from  msdb..sysjobs_view s 
 left join master.sys.syslogins l on s.owner_sid = l.sid

or

SELECT *, SUSER_SNAME(s.owner_sid) AS owner
 from  msdb..sysjobs_view s 

I think I have a shortcut for that:

# Importing datetime.
from datetime import datetime

# Creating a datetime object so we can test.
a = datetime.now()

# Converting a to string in the desired format (YYYYMMDD) using strftime
# and then to int.
a = int(a.strftime('%Y%m%d'))

Use cases are used to document behavior, e.g. answer this question.

A behavior extends another if it is in addition to but not necessarily part of the behavior, e.g. research the answer.

Also note that researching the answer doesn't make much sense if you are not trying to answer the question.

A behavior is included in another if it is part of the including behavior, e.g. login to stack exchange.

To clarify, the illustration is only true if you want to answer here in stack overflow :).

These are the technical definitions from UML 2.5 pages 671-672.

I highlighted what I think are important points.

Extends

An Extend is a relationship from an extending UseCase (the extension) to an extended UseCase (the extendedCase) that specifies how and when the behavior defined in the extending UseCase can be inserted into the behavior defined in the extended UseCase. The extension takes place at one or more specific extension points defined in the extended UseCase.

Extend is intended to be used when there is some additional behavior that should be added, possibly conditionally, to the behavior defined in one or more UseCases.

The extended UseCase is defined independently of the extending UseCase and is meaningful independently of the extending UseCase. On the other hand, the extending UseCase typically defines behavior that may not necessarily be meaningful by itself. Instead, the extending UseCase defines a set of modular behavior increments that augment an execution of the extended UseCase under specific conditions.

...

Includes

Include is a DirectedRelationship between two UseCases, indicating that the behavior of the included UseCase (the addition) is inserted into the behavior of the including UseCase (the includingCase). It is also a kind of NamedElement so that it can have a name in the context of its owning UseCase (the includingCase). The including UseCase may depend on the changes produced by executing the included UseCase. The included UseCase must be available for the behavior of the including UseCase to be completely described.

The Include relationship is intended to be used when there are common parts of the behavior of two or more UseCases. This common part is then extracted to a separate UseCase, to be included by all the base UseCases having this part in common. As the primary use of the Include relationship is for reuse of common parts, what is left in a base UseCase is usually not complete in itself but dependent on the included parts to be meaningful. This is reflected in the direction of the relationship, indicating that the base UseCase depends on the addition but not vice versa.

...

You could do either:

dirname(__DIR__);

Or:

__DIR__ . '/..';

...but in a web server environment you will probably find that you are already working from current file's working directory, so you can probably just use:

'../'

...to reference the directory above. You can replace __DIR__ with dirname(__FILE__) before PHP 5.3.0.

You should also be aware what __DIR__ and __FILE__ refers to:

The full path and filename of the file. If used inside an include, the name of the included file is returned.

So it may not always point to where you want it to.

With CREATE TABLE statement

CREATE TABLE my_table (
  id INT UNSIGNED NOT NULL AUTO_INCREMENT,
  name VARCHAR(100) NOT NULL,
  PRIMARY KEY (id)
) AUTO_INCREMENT = 100;

or with ALTER TABLE statement

ALTER TABLE my_table AUTO_INCREMENT = 200;

If you could show the actual page, we, possibly, could help you better.

If you want to trigger the button only after the iframe is loaded, you might want to check if it has been loaded or use the iframe.onload:

<iframe .... onload='buttonWhatever(); '></iframe>


<script type="text/javascript">

    function buttonWhatever() {
        $("#<%=Button1.ClientID%>").click(function (event) {
            $('#<%=TextBox1.ClientID%>').change(function () {
                $('#various3').attr('href', $(this).val());
            });
            $("#<%=Button2.ClientID%>").click();
        });

        function showStickySuccessToast() {
            $().toastmessage('showToast', {
                text: 'Finished Processing!',
                sticky: false,
                position: 'middle-center',
                type: 'success',
                closeText: '',
                close: function () { }
            });
        }
    }

</script>

You can reload using /etc/init.d/nginx reload and sudo service nginx reload

If nginx -t throws some error then it won't reload

so use && to run both at a same time

like

nginx -t && /etc/init.d/nginx reload

What's happening here is the following: You create a new file on your trunk, then you merge it into your branch. In the merge commit this file will be created in your branch also.

When you merge your branch back into the trunk, SVN tries to do the same again: It sees that a file was created in your branch, and tries to create it in your trunk in the merge commit, but it already exists! This creates a tree conflict.

The way to avoid this, is to do a special merge, a reintegration. You can achieve this with the --reintegrate switch.

You can read about this in the documentation: http://svnbook.red-bean.com/en/1.7/svn.branchmerge.basicmerging.html#svn.branchemerge.basicmerging.reintegrate

When merging your branch back to the trunk, however, the underlying mathematics are quite different. Your feature branch is now a mishmash of both duplicated trunk changes and private branch changes, so there's no simple contiguous range of revisions to copy over. By specifying the --reintegrate option, you're asking Subversion to carefully replicate only those changes unique to your branch. (And in fact, it does this by comparing the latest trunk tree with the latest branch tree: the resulting difference is exactly your branch changes!)

After reintegrating a branch it is highly advisable to remove it, otherwise you will keep getting treeconflicts whenever you merge in the other direction: from the trunk to your branch. (For exactly the same reason as described before.)

There is a way around this too, but I never tried it. You can read it in this post: Subversion branch reintegration in v1.6

Simply use :

docker-compose build [yml_service_name]

Replace [yml_service_name] with your service name in docker-compose.yml file. You can use docker-compose restart to make sure changes are effected. You can use --no-cache to ignore the cache.

If you don't want to do it manually use Apache Commons - Codec library. The class you are looking at is: org.apache.commons.codec.net.URLCodec

String final url = "http://www.google.com?...."
String final urlSafe = org.apache.commons.codec.net.URLCodec.encode(url);

Adding Environment Variable simplified with screenshot. Check the below URL and you should be able to do without any trouble.

https://itsforlavanya.blogspot.com/2020/08/environment-variable-simple-7-steps-to.html

In python 3 you can easily convert a byte string into a list of integers (0..255) by

>>> list(b'y\xcc\xa6\xbb')
[121, 204, 166, 187]

Dreamhost now includes SoapClient in their PHP 5.3 builds. You can switch your version of php in the domain setup section of the dreamhost control panel.

Here's a different approach. The heart of it was created by turning on the Macro Recorder and filtering the columns per your specifications. Then there's a bit of code to copy the results. It will run faster than looping through each row and column:

Sub FilterAndCopy()
Dim LastRow As Long

Sheets("Sheet2").UsedRange.Offset(0).ClearContents
With Worksheets("Sheet1")
    .Range("$A:$E").AutoFilter
    .Range("$A:$E").AutoFilter field:=1, Criteria1:="#N/A"
    .Range("$A:$E").AutoFilter field:=2, Criteria1:="=String1", Operator:=xlOr, Criteria2:="=string2"
    .Range("$A:$E").AutoFilter field:=3, Criteria1:=">0"
    .Range("$A:$E").AutoFilter field:=5, Criteria1:="Number"
    LastRow = .Range("A" & .Rows.Count).End(xlUp).Row
    .Range("A1:A" & LastRow).SpecialCells(xlCellTypeVisible).EntireRow.Copy _
            Destination:=Sheets("Sheet2").Range("A1")
End With
End Sub

As a side note, your code has more loops and counter variables than necessary. You wouldn't need to loop through the columns, just through the rows. You'd then check the various cells of interest in that row, much like you did.

You can use the sequence of a no-break space (U+00a0) followed by two spaces (U+0020×2) followed by a newline (U+000a) repeatedly to achieve this. Two or more times is required depending on your use case.

Using (not markdown interpreted here, but) actual white space characters (theoretically copy-and-paste-able):

Preceding
   
   
   
Following.

s = 'hi how are you'
l = list(map(lambda x: x,s.split()))
print(l)

Output: ['hi', 'how', 'are', 'you']

That's because the byte[] output is well, and array of bytes, you may think on it as an array of bytes representing each one an integer, but when you add them all into a single string you get something that is NOT an integer, that's why. You may either have it as an array of integers or try to create an instance of BigInteger.

You can use SimpleDateFormat

SimpleDateFormat sdf = new SimpleDateFormat("dd/MM/yyyy");
Date d = sdf.parse("21/12/2012");

But I don't know whether it should be considered more right than to use Calendar ...

CharSequence is an interface and String implements it. You can instantiate a String but you could not do that for CharSequence since it is an interface. You can find other implementations in CharSequence in the official Java website.

import { readFileSync } from 'fs';

const file = readFileSync('./filename.txt', 'utf-8');

This worked for me. You may need to wrap the second command in any function or you may need to declare inside a class without keyword const.

I might be missing something here, by why not:

#include <cstdio>    
struct Group {
    int x;
    int y;
    const char* s;
};

int main() 
{  
  Group group {
    .x = 1, 
    .y = 2, 
    .s = "Hello it works"
  };
  printf("%d, %d, %s", group.x, group.y, group.s);
}

To answer Prasanna's question below:

How do you replace multiple spaces by single space in Javascript ?

You would use the same function replace with a different regular expression. The expression for whitespace is \s and the expression for "1 or more times" is + the plus sign, so you'd just replace Adam's answer with the following:

key=key.replace(/\s+/g,"_");

This version, using the Windows API function MultiByteToWideChar(), handles the memory allocation for arbitrarily long input strings.

int lenA = lstrlenA(input);
int lenW = ::MultiByteToWideChar(CP_ACP, 0, input, lenA, NULL, 0);
if (lenW>0)
{
    output = new wchar_t[lenW];
    ::MultiByteToWideChar(CP_ACP, 0, input, lenA, output, lenW);
} 

You always need to check for XACT_STATE(), irrelevant of the XACT_ABORT setting. I have an example of a template for stored procedures that need to handle transactions in the TRY/CATCH context at Exception handling and nested transactions:

create procedure [usp_my_procedure_name]
as
begin
    set nocount on;
    declare @trancount int;
    set @trancount = @@trancount;
    begin try
        if @trancount = 0
            begin transaction
        else
            save transaction usp_my_procedure_name;

        -- Do the actual work here

lbexit:
        if @trancount = 0   
            commit;
    end try
    begin catch
        declare @error int, @message varchar(4000), @xstate int;
        select @error = ERROR_NUMBER(),
               @message = ERROR_MESSAGE(), 
               @xstate = XACT_STATE();
        if @xstate = -1
            rollback;
        if @xstate = 1 and @trancount = 0
            rollback
        if @xstate = 1 and @trancount > 0
            rollback transaction usp_my_procedure_name;

        raiserror ('usp_my_procedure_name: %d: %s', 16, 1, @error, @message) ;
    end catch   
end

http://sandbox.phpcode.eu/g/corrected-b5fe953c76d4b82f7e63f1cef1bc506e.php

<span id="black_only">Show only black</span><br>
<span id="white_only">Show only white</span><br>
<span id="all">Show all of them</span>
<style>
.black{background-color:black;}
#white{background-color:white;}
</style>
<table class="someclass" border="0" cellpadding="0" cellspacing="0" summary="bla bla bla">
<caption>bla bla bla</caption>
<thead>
  <tr class="black">
    <th>Header Text</th>
    <th>Header Text</th>
    <th>Header Text</th>
    <th>Header Text</th>
    <th>Header Text</th>
    <th>Header Text</th>
  </tr>
</thead>
<tbody>
  <tr id="white">
    <td>Some Text</td>
    <td>Some Text</td>
    <td>Some Text</td>
    <td>Some Text</td>
    <td>Some Text</td>
    <td>Some Text</td>
</tr>
  <tr class="black" style="background-color:black;">
    <td>Some Text</td>
    <td>Some Text</td>
    <td>Some Text</td>
    <td>Some Text</td>
    <td>Some Text</td>
    <td>Some Text</td>
</tr>
</tbody>
<script>
$(function(){
   $("#black_only").click(function(){
    $("#white").hide();
    $(".black").show();

   });
   $("#white_only").click(function(){
    $(".black").hide();
    $("#white").show();

   });
   $("#all").click(function(){
    $("#white").show();
    $(".black").show();

   });

});
</script>

Java will not throw an exception if you divide by float zero. It will detect a run-time error only if you divide by integer zero not double zero.

If you divide by 0.0, the result will be INFINITY.

Most of the time, it is the same.

But, path can exist physically whereas path.exists() returns False. This is the case if os.stat() returns False for this file.

If path exists physically, then path.isdir() will always return True. This does not depend on platform.

WAR file is just a JAR file, to extract it, just issue following jar command –

jar -xvf yourWARfileName.war

If the jar command is not found, which sometimes happens in the Windows command prompt, then specify full path i.e. in my case it is,

 c:\java\jdk-1.7.0\bin\jar -xvf my-file.war

Add this to the top of your file and the site will refresh every 30 seconds.

<script type="text/javascript">
    window.onload = Refresh;

    function Refresh() {
        setTimeout("refreshPage();", 30000);
    }
    function refreshPage() {
        window.location = location.href;
    }
</script>

Another one is: Add in the head tag

<meta http-equiv="refresh" content="30">

Similar to @nicolaskruchten s answer you could do the following:

require(ggplot2)

df = data.frame(ID = c('P1', 'P1', 'P2', 'P2', 'P3', 'P3'),
                Value1 = c(100, 120, 300, 400, 130, 140),
                Value2 = c(12, 13, 11, 16, 15, 12))

ggplot(df) + 
  geom_line(data = ~.x[.x$ID %in% c("P1" , "P3"), ],
            aes(Value1, Value2, group = ID, colour = ID))

1. Make the servlet filter implement the spring Ordered interface.
2. Declare the servlet filter bean manually in configuration class.

    import org.springframework.core.Ordered;
    
    public class MyFilter implements Filter, Ordered {

        @Override
        public void init(FilterConfig filterConfig) {
            // do something
        }

        @Override
        public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
            // do something
        }

        @Override
        public void destroy() {
            // do something
        }

        @Override
        public int getOrder() {
            return -100;
        }
    }


    import org.springframework.context.annotation.ComponentScan;
    import org.springframework.context.annotation.Configuration;

    @Configuration
    @ComponentScan
    public class MyAutoConfiguration {

        @Bean
        public MyFilter myFilter() {
            return new MyFilter();
        }
    }

The following approach worked for me

1. Navigate to your android SDK/tools folder in the terminal window (in case you didn't added the path for it)

2. Make sure the virtual device you're planning to clean is powered off.

3. Run the command "./emulator -wipe-data -avd YourAvdName" where YourAvdName is the name of your virtual android device

You should set android:button="@null" instead of "null".

You were soo close!

You can do this natively with HTML5 <datalist>:

<label>Choose a browser from this list:_x000D_
<input list="browsers" name="myBrowser" /></label>_x000D_
<datalist id="browsers">_x000D_
  <option value="Chrome">_x000D_
  <option value="Firefox">_x000D_
  <option value="Internet Explorer">_x000D_
  <option value="Opera">_x000D_
  <option value="Safari">_x000D_
  <option value="Microsoft Edge">_x000D_
</datalist>

Declaration

Declarations tell the compiler that a program element or name exists. A declaration introduces one or more names into a program. Declarations can occur more than once in a program. Therefore, classes, structures, enumerated types, and other user-defined types can be declared for each compilation unit.

Definition

Definitions specify what code or data the name describes. A name must be declared before it can be used.

|| is the or operator.

if(A || B){ do something }

Save your sorting order in a ViewState.

private const string ASCENDING = " ASC";
private const string DESCENDING = " DESC";

public SortDirection GridViewSortDirection
{
    get
    {
        if (ViewState["sortDirection"] == null)
            ViewState["sortDirection"] = SortDirection.Ascending;

        return (SortDirection) ViewState["sortDirection"];                
    }
    set { ViewState["sortDirection"] = value; } 
}

protected void GridView_Sorting(object sender, GridViewSortEventArgs e)
{
    string sortExpression = e.SortExpression;

    if (GridViewSortDirection == SortDirection.Ascending)
    {
        GridViewSortDirection = SortDirection.Descending;
        SortGridView(sortExpression, DESCENDING);
    }
    else
    {
        GridViewSortDirection = SortDirection.Ascending;
        SortGridView(sortExpression, ASCENDING); 
    }   

}

private void SortGridView(string sortExpression,string direction)
{
    //  You can cache the DataTable for improving performance
    DataTable dt = GetData().Tables[0]; 

    DataView dv = new DataView(dt); 
    dv.Sort = sortExpression + direction;         

    GridView1.DataSource = dv;
    GridView1.DataBind();         
}

Why you don't want to use existing sorting functionality? You can always customize it.

Sorting Data in a GridView Web Server Control at MSDN

Here is an example with customization:

http://www.netomatix.com/development/GridViewSorting.aspx

Had same issue after clean install of VS 2019. Tests are found but not run with "Unexpected error occurred". Fixed by setting up x64 instead of x86 which was selected by default.

For all you non-xml config folks:

ObjectMapper objMapper = new ObjectMapper().setSerializationInclusion(JsonInclude.Include.NON_NULL);
HttpMessageConverter msgConverter = new MappingJackson2HttpMessageConverter(objMapper);
restTemplate.setMessageConverters(Collections.singletonList(msgConverter));

You could use the INDIRECT function. This takes a string and converts it into a range

More info here

=INDIRECT("K"&A2)

But it's preferable to use INDEX as it is less volatile.

=INDEX(K:K,A2)

This returns a value or the reference to a value from within a table or range

More info here

Put either function into cell B2 and fill down.

Your comparison function between old value and new value is having some issue. It is better not to complicate things so much, as it will increase your debugging effort later. You should keep it simple.

The best way is to create a person-component and watch every person separately inside its own component, as shown below:

<person-component :person="person" v-for="person in people"></person-component>

Please find below a working example for watching inside person component. If you want to handle it on parent side, you may use $emit to send an event upwards, containing the id of modified person.

Vue.component('person-component', {_x000D_
    props: ["person"],_x000D_
    template: `_x000D_
        <div class="person">_x000D_
            {{person.name}}_x000D_
            <input type='text' v-model='person.age'/>_x000D_
        </div>`,_x000D_
    watch: {_x000D_
        person: {_x000D_
            handler: function(newValue) {_x000D_
                console.log("Person with ID:" + newValue.id + " modified")_x000D_
                console.log("New age: " + newValue.age)_x000D_
            },_x000D_
            deep: true_x000D_
        }_x000D_
    }_x000D_
});_x000D_
_x000D_
new Vue({_x000D_
    el: '#app',_x000D_
    data: {_x000D_
        people: [_x000D_
          {id: 0, name: 'Bob', age: 27},_x000D_
          {id: 1, name: 'Frank', age: 32},_x000D_
          {id: 2, name: 'Joe', age: 38}_x000D_
        ]_x000D_
    }_x000D_
});

<script src="https://unpkg.com/[email protected]/dist/vue.js"></script>_x000D_
<body>_x000D_
    <div id="app">_x000D_
        <p>List of people:</p>_x000D_
        <person-component :person="person" v-for="person in people"></person-component>_x000D_
    </div>_x000D_
</body>

No one actually wrote this yet I guess but you can do:

round(12, -1) --> 10
round(18, -1) --> 20

coalesce is supported in both Oracle and SQL Server and serves essentially the same function as nvl and isnull. (There are some important differences, coalesce can take an arbitrary number of arguments, and returns the first non-null one. The return type for isnull matches the type of the first argument, that is not true for coalesce, at least on SQL Server.)

In my case, it was caused by a missing (0) in javascript:void(0) in an anchor.

Sounds like you want:

var movies = _db.Movies.Where(p => p.Genres.Intersect(listOfGenres).Any());

you can add "+" in your variable,

example :

$numString = "0000001123000";
echo +$numString;

I had the same problem, and found the solution here :

http://www.mastertheboss.com/web-interfaces/336-jax-ws-basic-authentication.html?start=1

good luck

In jQuery, you can do alert($("#theid").css("width")).

-- if you haven't taken a look at jQuery, I highly recommend it; it makes many simple javascript tasks effortless.

Update

for the record, this post is 5 years old. The web has developed, moved on, etc. There are ways to do this with Plain Old Javascript, which is better.

Add base64decoder jar and try these imports:

import Decoder.BASE64Decoder;
import Decoder.BASE64Encoder;

rsync transfers files as fast as it can over the network. For example, try using it to copy one large file that doesn't exist at all on the destination. That speed is the maximum speed rsync can transfer data. Compare it with the speed of scp (for example). rsync is even slower at raw transfer when the destination file exists, because both sides have to have a two-way chat about what parts of the file are changed, but pays for itself by identifying data that doesn't need to be transferred.

A simpler way to run rsync in parallel would be to use parallel. The command below would run up to 5 rsyncs in parallel, each one copying one directory. Be aware that the bottleneck might not be your network, but the speed of your CPUs and disks, and running things in parallel just makes them all slower, not faster.

run_rsync() {
    # e.g. copies /main/files/blah to /main/filesTest/blah
    rsync -av "$1" "/main/filesTest/${1#/main/files/}"
}
export -f run_rsync
parallel -j5 run_rsync ::: /main/files/*

First be sure that your working copy is not modified. Then:

git diff --binary HEAD commit_sha_you_want_to_revert_to | git apply

and then just commit. Don't forget to document what's the reason for revert.

If you are using javascript in HTML, you should include file1.js and file2.js inside your html:

<script src="path_to/file1.js"></script>
<script src="path_to/file2.js"></script>

Note, file1 should come first before file2.

I don't know why do you need this onmousedown event here, but what you have to do is put your function above actual usage. Look at the snipplet below:

<script type="text/javascript">_x000D_
function jsFunction(value)_x000D_
{_x000D_
    alert(value);_x000D_
}_x000D_
</script>_x000D_
_x000D_
<select id ="ddl" name="ddl" onmousedown="this.value='';" onchange="jsFunction(this.value);">_x000D_
  <option value='1'>One</option>_x000D_
  <option value='2'>Two</option>_x000D_
  <option value='3'>Three</option>_x000D_
</select>

I try lots of ways and finally try this:

def db_persist(func):
    def persist(*args, **kwargs):
        func(*args, **kwargs)
        try:
            session.commit()
            logger.info("success calling db func: " + func.__name__)
            return True
        except SQLAlchemyError as e:
            logger.error(e.args)
            session.rollback()
            return False

    return persist

and :

@db_persist
def insert_or_update(table_object):
    return session.merge(table_object)

Try this code:

@echo off
color 02
set num1=0
set num2=1 
set terminator=5
:loop
set /a num1= %num1% + %num2%
if %num1%==%terminator% goto close
goto open
:close
echo %num1%
pause 
exit
:open
echo %num1%
goto loop

num1 is the number to be incremented and num2 is the value added to num1 and terminator is the value where the num1 will end. You can indicate different value for terminator in this statement (if %num1%==%terminator% goto close). This is the boolean expression goto close is the process if the boolean is true and goto open is the process if the boolean is false.

First of, suppose you have two different views in storyboard, and you want to navigate from one screen to another, so follow this steps:

1). Define all your views with class file and also storyboard id in identity inspector.

2). Make sure you add a navigation controller to the first view. Select it in the Storyboard and then Editor >Embed In > Navigation Controller

3). In your first class, import the "secondClass.h"

#import "ViewController.h
#import "secondController.h"

4). Add this command in the IBAction that has to perform the segue

secondController *next=[self.storyboard instantiateViewControllerWithIdentifier:@"second"];
[self.navigationController pushViewController:next animated:YES];

5). @"second" is secondview controller class, storyboard id.

I’m reposting my answer to a similar question because no-one seems to have given it here and it’s much cleaner and neater:

Use the alternative buttons property syntax:

$dialogDiv.dialog({
    autoOpen: false,
    modal: true,
    width: 600,
    resizable: false,
    buttons: [
        {
            text: "Cancel",
            "class": 'cancelButtonClass',
            click: function() {
                // Cancel code here
            }
        },
        {
            text: "Save",
            "class": 'saveButtonClass',
            click: function() {
                // Save code here
            }
        }
    ],
    close: function() {
        // Close code here (incidentally, same as Cancel code)
    }
});

Ok, first of all, use the str() function in python to turn 'number' into a string

number = 9876543210 #declaring and assigning
number = str(number) #converting

Then get the index, 0 = 1, 4 = 3 in index notation, use int() to turn it back into a number

print(int(number[3])) #printing the int format of the string "number"'s index of 3 or '6'

if you like it in the short form

print(int(str(9876543210)[3])) #condensed code lol, also no more variable 'number'

In WampServer Open WampServer Tray icon ----> Apache ---> Apache Modules --->rewrite_module

It looks like the original answer was for pre Apache 2.4. It did not work for me. Here's what I had to change to make it work in 2.4. This will work for any depth of subdomain of yourcompany.com.

SetEnvIf Host ^((?:.+\.)*yourcompany\.com?)$    CORS_ALLOW_ORIGIN=$1
Header append Access-Control-Allow-Origin  %{REQUEST_SCHEME}e://%{CORS_ALLOW_ORIGIN}e    env=CORS_ALLOW_ORIGIN
Header merge  Vary "Origin"

AFAIK GrantedAuthority and roles are same in spring security. GrantedAuthority's getAuthority() string is the role (as per default implementation SimpleGrantedAuthority).

For your case may be you can use Hierarchical Roles

<bean id="roleVoter" class="org.springframework.security.access.vote.RoleHierarchyVoter">
    <constructor-arg ref="roleHierarchy" />
</bean>
<bean id="roleHierarchy"
        class="org.springframework.security.access.hierarchicalroles.RoleHierarchyImpl">
    <property name="hierarchy">
        <value>
            ROLE_ADMIN > ROLE_createSubUsers
            ROLE_ADMIN > ROLE_deleteAccounts 
            ROLE_USER > ROLE_viewAccounts
        </value>
    </property>
</bean>

Not the exact sol you looking for, but hope it helps

Edit: Reply to your comment

Role is like a permission in spring-security. using intercept-url with hasRole provides a very fine grained control of what operation is allowed for which role/permission.

The way we handle in our application is, we define permission (i.e. role) for each operation (or rest url) for e.g. view_account, delete_account, add_account etc. Then we create logical profiles for each user like admin, guest_user, normal_user. The profiles are just logical grouping of permissions, independent of spring-security. When a new user is added, a profile is assigned to it (having all permissible permissions). Now when ever user try to perform some action, permission/role for that action is checked against user grantedAuthorities.

Also the defaultn RoleVoter uses prefix ROLE_, so any authority starting with ROLE_ is considered as role, you can change this default behavior by using a custom RolePrefix in role voter and using it in spring security.

This could be done running a simple find command:

find * -maxdepth 0 -exec mv {} PRE_{} \;

The above command will prefix all files and folders in the current directory with PRE_.

CAUSE: "Beginning in Android 6.0 (API level 23), users grant permissions to apps while the app is running, not when they install the app." In this case, "ACCESS_FINE_LOCATION" is a "dangerous permission and for that reason, you get this 'java.lang.SecurityException: "gps" location provider requires ACCESS_FINE_LOCATION permission.' error (https://developer.android.com/training/permissions/requesting.html).

SOLUTION: Implementing the code provided at https://developer.android.com/training/permissions/requesting.html under the "Request the permissions you need" and "Handle the permissions request response" headings.

The simplest way is to use the JsonPrimitive class, which derives from JsonElement, as shown below:

JsonElement element = new JsonPrimitive(yourString);
JsonObject result = element.getAsJsonObject();

You can also get them with pure javascript.

For example:

new URL(location.href).searchParams.get('page')

For this url: websitename.com/user/?page=1, it would return a value of 1

I know it not right way. It is not break the loop. It is a Jugad

let result = true;_x000D_
[1, 2, 3].forEach(function(el) {_x000D_
    if(result){_x000D_
      console.log(el);_x000D_
      if (el === 2){_x000D_
        result = false;_x000D_
      }_x000D_
    }_x000D_
});

window.location = document.getElementById('myAnchor').href

NOTE: AppJS is deprecated and not recommended anymore.

Take a look at NW.js instead.

I had the same error when configuring eclipse.ini to use JRE6. Turns out I caused this error by incorrectly configuring eclipse to use the 64 bit JVM while running a 32 bit version of eclipse 3.7.

The correct configuration required the eclipse.ini -vm argumument to use "C:/Program Files (x86)/" instead of "C:/Program Files/".

Make sure that the JVM version (32/64 bit) you use matches the eclipse version (32/64 bit).

For global replacement of '/r', this code worked for me.

mystring = mystring.replace(/\/r/g,'');

 $("#btnSubmit").click(function(){
        alert("button");
    });    

This also works in Silverlight 5 (perhaps earlier as well but i haven't tested it). I used the relative source like this and it worked fine.

RelativeSource="{RelativeSource Mode=FindAncestor, AncestorType=telerik:RadGridView}"

One word answer: asynchronicity.

Forewords

This topic has been iterated at least a couple of thousands of times, here, in Stack Overflow. Hence, first off I'd like to point out some extremely useful resources:

• @Felix Kling's answer to "How do I return the response from an asynchronous call?". See his excellent answer explaining synchronous and asynchronous flows, as well as the "Restructure code" section.
  @Benjamin Gruenbaum has also put a lot of effort explaining asynchronicity in the same thread.

• @Matt Esch's answer to "Get data from fs.readFile" also explains asynchronicity extremely well in a simple manner.

The answer to the question at hand

Let's trace the common behavior first. In all examples, the outerScopeVar is modified inside of a function. That function is clearly not executed immediately, it is being assigned or passed as an argument. That is what we call a callback.

Now the question is, when is that callback called?

It depends on the case. Let's try to trace some common behavior again:

• img.onload may be called sometime in the future, when (and if) the image has successfully loaded.
• setTimeout may be called sometime in the future, after the delay has expired and the timeout hasn't been canceled by clearTimeout. Note: even when using 0 as delay, all browsers have a minimum timeout delay cap (specified to be 4ms in the HTML5 spec).
• jQuery $.post's callback may be called sometime in the future, when (and if) the Ajax request has been completed successfully.
• Node.js's fs.readFile may be called sometime in the future, when the file has been read successfully or thrown an error.

In all cases, we have a callback which may run sometime in the future. This "sometime in the future" is what we refer to as asynchronous flow.

Asynchronous execution is pushed out of the synchronous flow. That is, the asynchronous code will never execute while the synchronous code stack is executing. This is the meaning of JavaScript being single-threaded.

More specifically, when the JS engine is idle -- not executing a stack of (a)synchronous code -- it will poll for events that may have triggered asynchronous callbacks (e.g. expired timeout, received network response) and execute them one after another. This is regarded as Event Loop.

That is, the asynchronous code highlighted in the hand-drawn red shapes may execute only after all the remaining synchronous code in their respective code blocks have executed:

In short, the callback functions are created synchronously but executed asynchronously. You just can't rely on the execution of an asynchronous function until you know it has executed, and how to do that?

It is simple, really. The logic that depends on the asynchronous function execution should be started/called from inside this asynchronous function. For example, moving the alerts and console.logs too inside the callback function would output the expected result, because the result is available at that point.

Implementing your own callback logic

Often you need to do more things with the result from an asynchronous function or do different things with the result depending on where the asynchronous function has been called. Let's tackle a bit more complex example:

var outerScopeVar;
helloCatAsync();
alert(outerScopeVar);

function helloCatAsync() {
    setTimeout(function() {
        outerScopeVar = 'Nya';
    }, Math.random() * 2000);
}

Note: I'm using setTimeout with a random delay as a generic asynchronous function, the same example applies to Ajax, readFile, onload and any other asynchronous flow.

This example clearly suffers from the same issue as the other examples, it is not waiting until the asynchronous function executes.

Let's tackle it implementing a callback system of our own. First off, we get rid of that ugly outerScopeVar which is completely useless in this case. Then we add a parameter which accepts a function argument, our callback. When the asynchronous operation finishes, we call this callback passing the result. The implementation (please read the comments in order):

// 1. Call helloCatAsync passing a callback function,
//    which will be called receiving the result from the async operation
helloCatAsync(function(result) {
    // 5. Received the result from the async function,
    //    now do whatever you want with it:
    alert(result);
});

// 2. The "callback" parameter is a reference to the function which
//    was passed as argument from the helloCatAsync call
function helloCatAsync(callback) {
    // 3. Start async operation:
    setTimeout(function() {
        // 4. Finished async operation,
        //    call the callback passing the result as argument
        callback('Nya');
    }, Math.random() * 2000);
}

Code snippet of the above example:

// 1. Call helloCatAsync passing a callback function,_x000D_
//    which will be called receiving the result from the async operation_x000D_
console.log("1. function called...")_x000D_
helloCatAsync(function(result) {_x000D_
    // 5. Received the result from the async function,_x000D_
    //    now do whatever you want with it:_x000D_
    console.log("5. result is: ", result);_x000D_
});_x000D_
_x000D_
// 2. The "callback" parameter is a reference to the function which_x000D_
//    was passed as argument from the helloCatAsync call_x000D_
function helloCatAsync(callback) {_x000D_
    console.log("2. callback here is the function passed as argument above...")_x000D_
    // 3. Start async operation:_x000D_
    setTimeout(function() {_x000D_
    console.log("3. start async operation...")_x000D_
    console.log("4. finished async operation, calling the callback, passing the result...")_x000D_
        // 4. Finished async operation,_x000D_
        //    call the callback passing the result as argument_x000D_
        callback('Nya');_x000D_
    }, Math.random() * 2000);_x000D_
}

Most often in real use cases, the DOM API and most libraries already provide the callback functionality (the helloCatAsync implementation in this demonstrative example). You only need to pass the callback function and understand that it will execute out of the synchronous flow, and restructure your code to accommodate for that.

You will also notice that due to the asynchronous nature, it is impossible to return a value from an asynchronous flow back to the synchronous flow where the callback was defined, as the asynchronous callbacks are executed long after the synchronous code has already finished executing.

Instead of returning a value from an asynchronous callback, you will have to make use of the callback pattern, or... Promises.

Promises

Although there are ways to keep the callback hell at bay with vanilla JS, promises are growing in popularity and are currently being standardized in ES6 (see Promise - MDN).

Promises (a.k.a. Futures) provide a more linear, and thus pleasant, reading of the asynchronous code, but explaining their entire functionality is out of the scope of this question. Instead, I'll leave these excellent resources for the interested:

• JavaScript Promises - HTML5 Rocks
• You're Missing the Point of Promises - domenic.me

More reading material about JavaScript asynchronicity

• The Art of Node - Callbacks explains asynchronous code and callbacks very well with vanilla JS examples and Node.js code as well.

Note: I've marked this answer as Community Wiki, hence anyone with at least 100 reputations can edit and improve it! Please feel free to improve this answer, or submit a completely new answer if you'd like as well.

I want to turn this question into a canonical topic to answer asynchronicity issues which are unrelated to Ajax (there is How to return the response from an AJAX call? for that), hence this topic needs your help to be as good and helpful as possible!

One method:

System.AppDomain.CurrentDomain.BaseDirectory

Another way to do it would be:

System.IO.Path.GetDirectoryName(System.Diagnostics.Process.GetCurrentProcess().MainModule.FileName)

To rename files, you can use the rename utility:

brew install rename

For example, to change a search string in all filenames in current directory:

rename -nvs searchword replaceword *

Remove the 'n' parameter to apply the changes.

More info: man rename

viewPager.addOnPageChangeListener(new OnPageChangeListener() {
            @Override
            public void onPageSelected(int position) {

                switch (position) {
    case 0:
        img_page1.setImageResource(R.drawable.dot_selected);
        img_page2.setImageResource(R.drawable.dot);
        img_page3.setImageResource(R.drawable.dot);
        img_page4.setImageResource(R.drawable.dot);
        break;

    case 1:
        img_page1.setImageResource(R.drawable.dot);
        img_page2.setImageResource(R.drawable.dot_selected);
        img_page3.setImageResource(R.drawable.dot);
        img_page4.setImageResource(R.drawable.dot);
        break;

    case 2:
        img_page1.setImageResource(R.drawable.dot);
        img_page2.setImageResource(R.drawable.dot);
        img_page3.setImageResource(R.drawable.dot_selected);
        img_page4.setImageResource(R.drawable.dot);
        break;

    case 3:
        img_page1.setImageResource(R.drawable.dot);
        img_page2.setImageResource(R.drawable.dot);
        img_page3.setImageResource(R.drawable.dot);
        img_page4.setImageResource(R.drawable.dot_selected);
        break;

    default:
        break;
    }


            }

            @Override
            public void onPageScrolled(int arg0, float arg1, int arg2) {

            }

            @Override
            public void onPageScrollStateChanged(int arg0) {

            }
        });

This solution will maintain the current scroll position whilst scrolling is disabled, unlike some which jump the user back to the top.

It's based on galambalazs' answer, but with support for touch devices, and refactored as a single object with jquery plugin wrapper.

Demo here.

On github here.

/**
 * $.disablescroll
 * Author: Josh Harrison - aloof.co
 *
 * Disables scroll events from mousewheels, touchmoves and keypresses.
 * Use while jQuery is animating the scroll position for a guaranteed super-smooth ride!
 */

;(function($) {

    "use strict";

    var instance, proto;

    function UserScrollDisabler($container, options) {
        // spacebar: 32, pageup: 33, pagedown: 34, end: 35, home: 36
        // left: 37, up: 38, right: 39, down: 40
        this.opts = $.extend({
            handleKeys : true,
            scrollEventKeys : [32, 33, 34, 35, 36, 37, 38, 39, 40]
        }, options);

        this.$container = $container;
        this.$document = $(document);
        this.lockToScrollPos = [0, 0];

        this.disable();
    }

    proto = UserScrollDisabler.prototype;

    proto.disable = function() {
        var t = this;

        t.lockToScrollPos = [
            t.$container.scrollLeft(),
            t.$container.scrollTop()
        ];

        t.$container.on(
            "mousewheel.disablescroll DOMMouseScroll.disablescroll touchmove.disablescroll",
            t._handleWheel
        );

        t.$container.on("scroll.disablescroll", function() {
            t._handleScrollbar.call(t);
        });

        if(t.opts.handleKeys) {
            t.$document.on("keydown.disablescroll", function(event) {
                t._handleKeydown.call(t, event);
            });
        }
    };

    proto.undo = function() {
        var t = this;
        t.$container.off(".disablescroll");
        if(t.opts.handleKeys) {
            t.$document.off(".disablescroll");
        }
    };

    proto._handleWheel = function(event) {
        event.preventDefault();
    };

    proto._handleScrollbar = function() {
        this.$container.scrollLeft(this.lockToScrollPos[0]);
        this.$container.scrollTop(this.lockToScrollPos[1]);
    };

    proto._handleKeydown = function(event) {
        for (var i = 0; i < this.opts.scrollEventKeys.length; i++) {
            if (event.keyCode === this.opts.scrollEventKeys[i]) {
                event.preventDefault();
                return;
            }
        }
    };


    // Plugin wrapper for object
    $.fn.disablescroll = function(method) {

        // If calling for the first time, instantiate the object and save
        // reference. The plugin can therefore only be instantiated once per
        // page. You can pass options object in through the method parameter.
        if( ! instance && (typeof method === "object" || ! method)) {
            instance = new UserScrollDisabler(this, method);
        }

        // Instance already created, and a method is being explicitly called,
        // e.g. .disablescroll('undo');
        else if(instance && instance[method]) {
            instance[method].call(instance);
        }

    };

    // Global access
    window.UserScrollDisabler = UserScrollDisabler;

})(jQuery);

Here's my version of that nice CSS solution JS Fiddle example posted above.

http://jsfiddle.net/496c9/

HTML

<div id="donate">
    <label class="blue"><input type="radio" name="toggle"><span>$20</span></label>
    <label class="green"><input type="radio" name="toggle"><span>$50</span></label>
    <label class="yellow"><input type="radio" name="toggle"><span>$100</span></label>
    <label class="pink"><input type="radio" name="toggle"><span>$500</span></label>
    <label class="purple"><input type="radio" name="toggle"><span>$1000</span></label>
</div>

CSS

body {
    font-family:sans-serif;
}

#donate {
    margin:4px;

    float:left;
}

#donate label {
    float:left;
    width:170px;
    margin:4px;
    background-color:#EFEFEF;
    border-radius:4px;
    border:1px solid #D0D0D0;
    overflow:auto;

}

#donate label span {
    text-align:center;
    font-size: 32px;
    padding:13px 0px;
    display:block;
}

#donate label input {
    position:absolute;
    top:-20px;
}

#donate input:checked + span {
    background-color:#404040;
    color:#F7F7F7;
}

#donate .yellow {
    background-color:#FFCC00;
    color:#333;
}

#donate .blue {
    background-color:#00BFFF;
    color:#333;
}

#donate .pink {
    background-color:#FF99FF;
    color:#333;
}

#donate .green {
    background-color:#A3D900;
    color:#333;
}
#donate .purple {
    background-color:#B399FF;
    color:#333;
}

Styled with coloured buttons :)

In order to convert string to char

 String str = "abcd";
char arr [] = new char[len]; // len is the length of the array
arr = str.toCharArray();

Change

Morison_File << t;                                 //Printing to file
Morison_File << F;

To

Morison_File << t << ";" << F << endl;                                 //Printing to file

a , would also do instead of ;

For me it was because I hadn't set an active class on any of the slides.

Writing csv files by hand can be difficult because your data might contain commas and newlines. I suggest you use an existing library instead.

This question mentions a few options.

Are there any CSV readers/writer libraries in C#?

Here is the Oracle solution (10g or higher). It uses the analytic function last_value() with the ignore nulls option, which substitutes the last non-null value for the column.

SQL> select *
  2  from mytable
  3  order by id
  4  /

        ID    SOMECOL
---------- ----------
         1          3
         2
         3          5
         4
         5
         6          2

6 rows selected.

SQL> select id
  2         , last_value(somecol ignore nulls) over (order by id) somecol
  3  from mytable
  4  /

        ID    SOMECOL
---------- ----------
         1          3
         2          3
         3          5
         4          5
         5          5
         6          2

6 rows selected.

SQL>

native ES6 solution:

const pos = data.findIndex(el => el.id === ID_TO_REMOVE);
if (pos >= 0)
    data.splice(pos, 1);

if you know that the element is in the array for sure:

data.splice(data.findIndex(el => el.id === ID_TO_REMOVE), 1);

prototype:

Array.prototype.removeByProp = function(prop,val) {
    const pos = this.findIndex(x => x[prop] === val);
    if (pos >= 0)
        return this.splice(pos, 1);
};

// usage:
ar.removeByProp('id', ID_TO_REMOVE);

http://jsfiddle.net/oriadam/72kgprw5/

note: this removes the item in-place. if you need a new array use filter as mentioned in previous answers.

I received this error with regards to the largeHeap Attribute, my application did not run under eclipse but under ant it still built and ran normally.

The android documentation states that:

attributes:

xmlns:android

Defines the Android namespace. This attribute should always be set to "http://schemas.android.com/apk/res/android".

I erased that line in my manifest, saved in eclipse, pasted the line back in and saved again, and it worked. In my case I guess the problem was eclipse, ant and adb not talking to each other correctly and the saving reset something. Interestingly restarting eclipse did not solve this problem (usually with these types of problems restarting eclipse is the first thing you should try, and usually it solves the problem).

tl;dr

The modern approach uses the java.time classes.

YearMonth.from(
    ZonedDateTime.parse( 
        "Mon Mar 14 16:02:37 GMT 2011" , 
        DateTimeFormatter.ofPattern( "E MMM d HH:mm:ss z uuuu" )
     )
).toString()

2011-03

Avoid legacy date-time classes

The modern way is with java.time classes. The old date-time classes such as Calendar have proven to be poorly-designed, confusing, and troublesome.

Define a custom formatter to match your string input.

String input = "Mon Mar 14 16:02:37 GMT 2011";
DateTimeFormatter f = DateTimeFormatter.ofPattern( "E MMM d HH:mm:ss z uuuu" );

Parse as a ZonedDateTime.

ZonedDateTime zdt = ZonedDateTime.parse( input , f );

You are interested in the year and month. The java.time classes include YearMonth class for that purpose.

YearMonth ym = YearMonth.from( zdt );

You can interrogate for the year and month numbers if needed.

int year = ym.getYear();
int month = ym.getMonthValue();

But the toString method generates a string in standard ISO 8601 format.

String output = ym.toString();

Put this all together.

String input = "Mon Mar 14 16:02:37 GMT 2011";
DateTimeFormatter f = DateTimeFormatter.ofPattern( "E MMM d HH:mm:ss z uuuu" );
ZonedDateTime zdt = ZonedDateTime.parse( input , f );
YearMonth ym = YearMonth.from( zdt );
int year = ym.getYear();
int month = ym.getMonthValue();

Dump to console.

System.out.println( "input: " + input );
System.out.println( "zdt: " + zdt );
System.out.println( "ym: " + ym );

input: Mon Mar 14 16:02:37 GMT 2011

zdt: 2011-03-14T16:02:37Z[GMT]

ym: 2011-03

Live code

See this code running in IdeOne.com.

Conversion

If you must have a Calendar object, you can convert to a GregorianCalendar using new methods added to the old classes.

GregorianCalendar gc = GregorianCalendar.from( zdt );

About java.time

The java.time framework is built into Java 8 and later. These classes supplant the troublesome old legacy date-time classes such as java.util.Date, Calendar, & SimpleDateFormat.

The Joda-Time project, now in maintenance mode, advises migration to java.time.

To learn more, see the Oracle Tutorial. And search Stack Overflow for many examples and explanations. Specification is JSR 310.

Where to obtain the java.time classes?

• Java SE 8 and SE 9 and later
  • Built-in.
  • Part of the standard Java API with a bundled implementation.
  • Java 9 adds some minor features and fixes.
• Java SE 6 and SE 7
  • Much of the java.time functionality is back-ported to Java 6 & 7 in ThreeTen-Backport.
• Android
  • The ThreeTenABP project adapts ThreeTen-Backport (mentioned above) for Android specifically.
  • See How to use….

The ThreeTen-Extra project extends java.time with additional classes. This project is a proving ground for possible future additions to java.time. You may find some useful classes here such as Interval, YearWeek, YearQuarter, and more.

public const int NUMBER = 9;

You'd need to put it in a class somewhere, and the usage would be ClassName.NUMBER

#include "stdafx.h"
#include "malloc.h"
#include "string.h"

int main(int argc, char* argv[])
{

  char *ptr = (char*)malloc(sizeof(char)*30);
  strcpy(ptr,"            Hel  lo    wo           rl   d G    eo rocks!!!    by shahil    sucks b i          g       tim           e");

  int i = 0, j = 0;

  while(ptr[j]!='\0')
  {

      if(ptr[j] == ' ' )
      {
          j++;
          ptr[i] = ptr[j];
      }
      else
      {
          i++;
          j++;
          ptr[i] = ptr[j];
      }
  }


  printf("\noutput-%s\n",ptr);
        return 0;
}

With GNU Make, you can use shell and eval to store, run, and assign output from arbitrary command line invocations. The difference between the example below and those which use := is the := assignment happens once (when it is encountered) and for all. Recursively expanded variables set with = are a bit more "lazy"; references to other variables remain until the variable itself is referenced, and the subsequent recursive expansion takes place each time the variable is referenced, which is desirable for making "consistent, callable, snippets". See the manual on setting variables for more info.

# Generate a random number.
# This is not run initially.
GENERATE_ID = $(shell od -vAn -N2 -tu2 < /dev/urandom)

# Generate a random number, and assign it to MY_ID
# This is not run initially.
SET_ID = $(eval MY_ID=$(GENERATE_ID))

# You can use .PHONY to tell make that we aren't building a target output file
.PHONY: mytarget
mytarget:
# This is empty when we begin
    @echo $(MY_ID)
# This recursively expands SET_ID, which calls the shell command and sets MY_ID
    $(SET_ID)
# This will now be a random number
    @echo $(MY_ID)
# Recursively expand SET_ID again, which calls the shell command (again) and sets MY_ID (again)
    $(SET_ID)
# This will now be a different random number
    @echo $(MY_ID)

You don't. The closest thing you can do is working with Maps to simulate it, or defining your own Objects to deal with.

I know that in order to use certain features of the gridview in .NET, you need a primary key in order for the gridview to know which row needs updating/deleting. General practice should be to have a primary key or primary key cluster. I personally prefer the former.

If you have more than one version of Python and the script needs to run under a specific version, the she-bang can ensure the right one is used when the script is executed directly, for example:

#!/usr/bin/python2.7

Note the script could still be run via a complete Python command line, or via import, in which case the she-bang is ignored. But for scripts run directly, this is a decent reason to use the she-bang.

#!/usr/bin/env python is generally the better approach, but this helps with special cases.

Usually it would be better to establish a Python virtual environment, in which case the generic #!/usr/bin/env python would identify the correct instance of Python for the virtualenv.

Swift 3 conversion of Java solution: (by @JeremyThompson)

protocol _IntType { }
extension Int: _IntType {}


extension Array where Element: _IntType {

    func subsets(to: Int) -> [[Element]]? {

        func sum_up_recursive(_ numbers: [Element], _ target: Int, _ partial: [Element], _ solution: inout [[Element]]) {

            var sum: Int = 0
            for x in partial {
                sum += x as! Int
            }

            if sum == target {
                solution.append(partial)
            }

            guard sum < target else {
                return
            }

            for i in stride(from: 0, to: numbers.count, by: 1) {

                var remaining = [Element]()

                for j in stride(from: i + 1, to: numbers.count, by: 1) {
                    remaining.append(numbers[j])
                }

                var partial_rec = [Element](partial)
                partial_rec.append(numbers[i])

                sum_up_recursive(remaining, target, partial_rec, &solution)
            }
        }

        var solutions = [[Element]]()
        sum_up_recursive(self, to, [Element](), &solutions)

        return solutions.count > 0 ? solutions : nil
    }

}

usage:

let numbers = [3, 9, 8, 4, 5, 7, 10]

if let solution = numbers.subsets(to: 15) {
    print(solution) // output: [[3, 8, 4], [3, 5, 7], [8, 7], [5, 10]]
} else {
    print("not possible")
}

LDAP stands for Lightweight Directory Access Protocol.It is used in Active Directory for communicating user queries..e.g.. LDAP can be used by users to search and locate a particular object like a laser printer in a domain.

Here is my version using the BuildConfig class:

Intent marketIntent = new Intent(Intent.ACTION_VIEW, uri);

marketIntent.addFlags(Intent.FLAG_ACTIVITY_NO_HISTORY | Intent.FLAG_ACTIVITY_MULTIPLE_TASK);

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
    marketIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_DOCUMENT);
}

try {
    startActivity(marketIntent);
} catch (ActivityNotFoundException e) {
    startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse("https://play.google.com/store/apps/details?id=" + BuildConfig.APPLICATION_ID)));
}

One simple way using list comprehensions is , if l is the list

l = [
{"name": "Tom", "age": 10},
{"name": "Mark", "age": 5},
{"name": "Pam", "age": 7}
]

then

[d['age'] for d in l if d['name']=='Tom']

TreeViewItem tempItem = new TreeViewItem();
TreeViewItem tempItem1 = new TreeViewItem(); 
tempItem =  (TreeViewItem) treeView1.Items.GetItemAt(0);    // Selecting the first of the top level nodes
tempItem1 = (TreeViewItem)tempItem.Items.GetItemAt(0);      // Selecting the first child of the first first level node
SelectedCategoryHeaderString = tempItem.Header.ToString();  // gets the header for the first top level node
SelectedCategoryHeaderString = tempItem1.Header.ToString(); // gets the header for the first child node of the first top level node
tempItem.IsExpanded = true;         //  will expand the first node

Enable CORS on backend server or add chrome extensions https://chrome.google.com/webstore/search/CORS?utm_source=chrome-ntp-icon and make ON

From: Developer > reference - Application

There is normally no need to subclass Application. In most situation, static singletons can provide the same functionality in a more modular way. If your singleton needs a global context (for example to register broadcast receivers), the function to retrieve it can be given a Context which internally uses Context.getApplicationContext() when first constructing the singleton.

If your are trying to debug your maven java project, and eclipse is not able to find your source, try one of these.

1. Try adding these lines in the pom.xml

<build>**<sourceDirectory>src/main/java</sourceDirectory>**...

Try maven->update and then debug

2. Go to the root directory of the project;

mvn eclipse:eclipse

now try debugging

I solved this converting the JSP from XHTML to HTML, doing this in the begining:

<%@page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

<html>
...

The backup creator had MSSql version 10 installed, so when he took the backup it also stores the original file path (to be able to restore it in same location), but I had version 11, so it could not find the destination directory.

So I changed the output file directory to C:\Program Files\Microsoft SQL Server\MSSQL11.MSSQLSERVER\MSSQL\DATA\, and it was able to restore the database successfully.

Source

try these

sudo chown -R $(whoami) ~/.npm

sudo chown -R $(whoami) /usr/local/lib

sudo chown -R $(whoami) /usr/local/bin

Then try your command again without sudo. e.g.

npm install -g npm@latest

Check this link for more details

Update 2016/1/23

If you find this answer useful, you may be interested in a simple (~500 SLOC) password generation library I published:

Install-Package MlkPwgen

Then you can generate random strings just like in the answer below:

var str = PasswordGenerator.Generate(length: 10, allowed: Sets.Alphanumerics);

One advantage of the library is that the code is better factored out so you can use secure randomness for more than generating strings. Check out the project site for more details.

Original Answer

Since no one has provided secure code yet, I post the following in case anyone finds it useful.

string RandomString(int length, string allowedChars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789") {
    if (length < 0) throw new ArgumentOutOfRangeException("length", "length cannot be less than zero.");
    if (string.IsNullOrEmpty(allowedChars)) throw new ArgumentException("allowedChars may not be empty.");

    const int byteSize = 0x100;
    var allowedCharSet = new HashSet<char>(allowedChars).ToArray();
    if (byteSize < allowedCharSet.Length) throw new ArgumentException(String.Format("allowedChars may contain no more than {0} characters.", byteSize));

    // Guid.NewGuid and System.Random are not particularly random. By using a
    // cryptographically-secure random number generator, the caller is always
    // protected, regardless of use.
    using (var rng = System.Security.Cryptography.RandomNumberGenerator.Create()) {
        var result = new StringBuilder();
        var buf = new byte[128];
        while (result.Length < length) {
            rng.GetBytes(buf);
            for (var i = 0; i < buf.Length && result.Length < length; ++i) {
                // Divide the byte into allowedCharSet-sized groups. If the
                // random value falls into the last group and the last group is
                // too small to choose from the entire allowedCharSet, ignore
                // the value in order to avoid biasing the result.
                var outOfRangeStart = byteSize - (byteSize % allowedCharSet.Length);
                if (outOfRangeStart <= buf[i]) continue;
                result.Append(allowedCharSet[buf[i] % allowedCharSet.Length]);
            }
        }
        return result.ToString();
    }
}

Thanks to Ahmad for pointing out how to get the code working on .NET Core.

The hex editor plugin mentioned by ellak still works, but it seems that you need the TextFX Characters plugin as well.

I initially installed only the hex plugin and Notepad++ would no longer pop up; instead it started eating memory (killed it at 1.2 GB). I removed it again and for other reasons installed the TextFX plugin (based on Find multiple lines in Notepad++)

Out of curiosity I installed the hex plugin again and now it works.

Note that this is on a fresh install of Windows 7 64 bit.

?: is a short-hand condition for else {} and if(){} problems. So your code is interchangeable to this:

if(max != 0){
       hsb.s = 225 * delta / max
}
else {
       hsb.s = 0
}

MDN - Conditional (Ternary) Operator

With similar pattern, my rest client is calling the service API, the service called successfully when debugging, but not working on the published code. Error was: Unable to connect to the remote server.

Inner Exception: System.Net.Sockets.SocketException (0x80004005): No connection could be made because the target machine actively refused it serviceIP:443 at System.Net.Sockets.Socket.DoConnect(EndPoint endPointSnapshot, SocketAddress socketAddress) at System.Net.ServicePoint.ConnectSocketInternal(Boolean connectFailure, Socket s4, Socket s6, Socket& socket, IPAddress& address, ConnectSocketState state, IAsyncResult asyncResult, Exception& exception)

Resolution: Set the proxy in Web config.

<system.net>
    <defaultProxy useDefaultCredentials="true">
      <proxy proxyaddress="http://proxy_ip:portno/" usesystemdefault="True"/>
    </defaultProxy>
</system.net>

I ran into this same issue and realized that, since I am using spring boot, all I needed to do to resolve the issue was to add the following dependency:

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-jpa</artifactId>
    </dependency>

This is my current favorite, because it's both flexible and modular. It's a collection of (at least) three simple functions:

/**
 * Returns an array with date / time information
 * Starts with year at index 0 up to index 6 for milliseconds
 * 
 * @param {Date} date   date object. If falsy, will take current time.
 * @returns {[]}
 */
getDateArray = function(date) {
    date = date || new Date();
    return [
        date.getFullYear(),
        exports.pad(date.getMonth()+1, 2),
        exports.pad(date.getDate(), 2),
        exports.pad(date.getHours(), 2),
        exports.pad(date.getMinutes(), 2),
        exports.pad(date.getSeconds(), 2),
        exports.pad(date.getMilliseconds(), 2)
    ];
};

Here's the pad function:

 /**
 * Pad a number with n digits
 *
 * @param {number} number   number to pad
 * @param {number} digits   number of total digits
 * @returns {string}
 */
exports.pad = function pad(number, digits) {
    return new Array(Math.max(digits - String(number).length + 1, 0)).join(0) + number;
};

Finally I can either build my date string by hand, or use a simple functions to do it for me:

/**
 * Returns nicely formatted date-time
 * @example 2015-02-10 16:01:12
 *
 * @param {object} date
 * @returns {string}
 */
exports.niceDate = function(date) {
    var d = exports.getDateArray(date);
    return d[0] + '-' + d[1] + '-' + d[2] + ' ' + d[3] + ':' + d[4] + ':' + d[5];
};

/**
 * Returns a formatted date-time, optimized for machines
 * @example 2015-02-10_16-00-08
 *
 * @param {object} date
 * @returns {string}
 */
exports.roboDate = function(date) {
    var d = exports.getDateArray(date);
    return d[0] + '-' + d[1] + '-' + d[2] + '_' + d[3] + '-' + d[4] + '-' + d[5];
};

    --DROP TABLE #Employee
    CREATE TABLE #Employee(EmpId BIGINT IDENTITY,EmpName VARCHAR(25),Designation VARCHAR(25),ManagerID BIGINT)

    INSERT INTO #Employee VALUES('M11M','Manager',NULL)
    INSERT INTO #Employee VALUES('P11P','Manager',NULL)

    INSERT INTO #Employee VALUES('AA','Clerk',1)
    INSERT INTO #Employee VALUES('AB','Assistant',1)
    INSERT INTO #Employee VALUES('ZC','Supervisor',2)
    INSERT INTO #Employee VALUES('ZD','Security',2)


    SELECT * FROM #Employee (NOLOCK)

    ;
    WITH Emp_CTE 
    AS
    (
        SELECT EmpId,EmpName,Designation, ManagerID
              ,CASE WHEN ManagerID IS NULL THEN EmpId ELSE ManagerID END ManagerID_N
        FROM #Employee  
    )
    select EmpId,EmpName,Designation, ManagerID
    FROM Emp_CTE
    order BY ManagerID_N, EmpId

You can simply check the typeof userData & JSON.parse() it only if it's string:

var userData = _data;
var newData;
if (typeof userData === 'object')
  newData = userData.data.userList; // dont parse if its object
else if (typeof userData === 'string')
  newData = JSON.parse(userData).data.userList; // parse if its string

I dont know about XamGrid but that's what i'll do with a standard wpf DataGrid:

<DataGrid>
    <DataGrid.Columns>
        <DataGridTemplateColumn>
            <DataGridTemplateColumn.CellTemplate>
                <DataTemplate>
                    <TextBlock Text="{Binding DataContext.MyProperty, RelativeSource={RelativeSource AncestorType=MyUserControl}}"/>
                </DataTemplate>
            </DataGridTemplateColumn.CellTemplate>
            <DataGridTemplateColumn.CellEditingTemplate>
                <DataTemplate>
                    <TextBox Text="{Binding DataContext.MyProperty, RelativeSource={RelativeSource AncestorType=MyUserControl}}"/>
                </DataTemplate>
            </DataGridTemplateColumn.CellEditingTemplate>
        </DataGridTemplateColumn>
    </DataGrid.Columns>
</DataGrid>

Since the TextBlock and the TextBox specified in the cell templates will be part of the visual tree, you can walk up and find whatever control you need.

One way I've used it is if I have two implementations of how to do something in a class and I want to choose one at run-time without having to continually go through an if statement i.e.

class Algorithm
{
public:
    Algorithm() : m_impFn( &Algorithm::implementationA ) {}
    void frequentlyCalled()
    {
        // Avoid if ( using A ) else if ( using B ) type of thing
        (this->*m_impFn)();
    }
private:
    void implementationA() { /*...*/ }
    void implementationB() { /*...*/ }

    typedef void ( Algorithm::*IMP_FN ) ();
    IMP_FN m_impFn;
};

Obviously this is only practically useful if you feel the code is being hammered enough that the if statement is slowing things done eg. deep in the guts of some intensive algorithm somewhere. I still think it's more elegant than the if statement even in situations where it has no practical use but that's just my opnion.

Please check if you have already close the database connection or not. In my case i was getting the error because the connection was close in upper line.

Tensorflow 2.0

Sessions are no longer used in 2.0. Instead, one can use tf.test.is_gpu_available:

import tensorflow as tf

assert tf.test.is_gpu_available()
assert tf.test.is_built_with_cuda()

If you get an error, you need to check your installation.

read -n1 is not portable. A portable way to do the same might be:

(   trap "stty $(stty -g;stty -icanon)" EXIT
    LC_ALL=C dd bs=1 count=1 >/dev/null 2>&1
)   </dev/tty

Besides using read, for just a press ENTER to continue prompt you could do:

sed -n q </dev/tty

The S parameter does not do anything on its own.

/S      Modifies the treatment of string after /C or /K (see below) 
/C      Carries out the command specified by string and then terminates  
/K      Carries out the command specified by string but remains  

Try something like this instead

Call Shell("cmd.exe /S /K" & "perl a.pl c:\temp", vbNormalFocus)

You may not even need to add "cmd.exe" to this command unless you want a command window to open up when this is run. Shell should execute the command on its own.

Shell("perl a.pl c:\temp")

-Edit-
To wait for the command to finish you will have to do something like @Nate Hekman shows in his answer here

Dim wsh As Object
Set wsh = VBA.CreateObject("WScript.Shell")
Dim waitOnReturn As Boolean: waitOnReturn = True
Dim windowStyle As Integer: windowStyle = 1

wsh.Run "cmd.exe /S /C perl a.pl c:\temp", windowStyle, waitOnReturn

You can use the mt and mb spacing utilities to add extra margins to the <hr>, for example:

<hr class="mt-5 mb-5">

https://getbootstrap.com/docs/4.3/utilities/spacing/

First off, you shouldn't add $ when you're outside of strings ($class in your first function being an exception), so it should be:

def doCopyMibArtefactsHere(projectName) {
    step ([
        $class: 'CopyArtifact',
        projectName: projectName,
        filter: '**/**.mib',
        fingerprintArtifacts: true, 
        flatten: true
    ]);
}

def BuildAndCopyMibsHere(projectName, params) {
    build job: project, parameters: params
    doCopyMibArtefactsHere(projectName)
}
...

Now, as for your problem; the second function takes two arguments while you're only supplying one argument at the call. Either you have to supply two arguments at the call:

...
node { 
    stage('Prepare Mib'){
        BuildAndCopyMibsHere('project1', null)
    }
}

... or you need to add a default value to the functions' second argument:

def BuildAndCopyMibsHere(projectName, params = null) {
    build job: project, parameters: params
    doCopyMibArtefactsHere($projectName)
}

I was hoping to add this as a comment to Marcus Westin's reply, but I can't find a link - maybe I need more reputation?

Anyway, thanks, I found this code snippet useful for quick debugging in IE. I have made some quick tweaks to fix a problem that stopped it working for me, also to scroll down automatically and use fixed positioning so it will appear in the viewport. Here's my version in case anyone finds it useful:

myLog = function() {

    var _div = null;

    this.toJson = function(obj) {

        if (typeof window.uneval == 'function') { return uneval(obj); }
        if (typeof obj == 'object') {
            if (!obj) { return 'null'; }
            var list = [];
            if (obj instanceof Array) {
                    for (var i=0;i < obj.length;i++) { list.push(this.toJson(obj[i])); }
                    return '[' + list.join(',') + ']';
            } else {
                    for (var prop in obj) { list.push('"' + prop + '":' + this.toJson(obj[prop])); }
                    return '{' + list.join(',') + '}';
            }
        } else if (typeof obj == 'string') {
            return '"' + obj.replace(/(["'])/g, '\\$1') + '"';
        } else {
            return new String(obj);
        }

    };

    this.createDiv = function() {

        myLog._div = document.body.appendChild(document.createElement('div'));

        var props = {
            position:'fixed', top:'10px', right:'10px', background:'#333', border:'5px solid #333', 
            color: 'white', width: '400px', height: '300px', overflow: 'auto', fontFamily: 'courier new',
            fontSize: '11px', whiteSpace: 'nowrap'
        }

        for (var key in props) { myLog._div.style[key] = props[key]; }

    };


    if (!myLog._div) { this.createDiv(); }

    var logEntry = document.createElement('span');

    for (var i=0; i < arguments.length; i++) {
        logEntry.innerHTML += this.toJson(arguments[i]) + '<br />';
    }

    logEntry.innerHTML += '<br />';

    myLog._div.appendChild(logEntry);

    // Scroll automatically to the bottom
    myLog._div.scrollTop = myLog._div.scrollHeight;

}

There is a contains method for lists, so you should be able to do:

Arrays.asList(yourArray).contains(yourObject);

Warning: this might not do what you (or I) expect, see Tom's comment below.

I know this thread is old now but I am answering it to keep things a bit updated.

With Angular 1.4 and above you can directly use limitTo filter which apart from accepting the limit parameter also accepts a begin parameter.

Usage: {{ limitTo_expression | limitTo : limit : begin}}

So now you may not need to use any third party library to achieve something like pagination. I have created a fiddle to illustrate the same.

Line from above answer:

HtmlDocument doc = new HtmlDocument();

This doesn't work in VS 2015 C#. You cannot construct an HtmlDocument any more.

Another MS "feature" that makes things more difficult to use. Try HtmlAgilityPack.HtmlWeb and check out this link for some sample code.

Same problem happened with me when i try to show popup menu in activity i also got same excpetion but i encounter problem n resolve by providing context

YourActivityName.this instead of getApplicationContext() at

Dialog dialog = new Dialog(getApplicationContext());

and yes it worked for me may it will help someone else

In R the equivalent function is seq and you can use it with the option by:

seq(from = 5, to = 100, by = 5)
# [1]   5  10  15  20  25  30  35  40  45  50  55  60  65  70  75  80  85  90  95 100

In addition to by you can also have other options such as length.out and along.with.

length.out: If you want to get a total of 10 numbers between 0 and 1, for example:

seq(0, 1, length.out = 10)
# gives 10 equally spaced numbers from 0 to 1

along.with: It takes the length of the vector you supply as input and provides a vector from 1:length(input).

seq(along.with=c(10,20,30))
# [1] 1 2 3

Although, instead of using the along.with option, it is recommended to use seq_along in this case. From the documentation for ?seq

seq is generic, and only the default method is described here. Note that it dispatches on the class of the first argument irrespective of argument names. This can have unintended consequences if it is called with just one argument intending this to be taken as along.with: it is much better to use seq_along in that case.

seq_along: Instead of seq(along.with(.))

seq_along(c(10,20,30))
# [1] 1 2 3

Hope this helps.

Simple way

@{
   Model.CRN = ViewBag.CRN;
}

@Html.HiddenFor(x => x.CRN)

You can use this delegate method from UITextFieldDelegate. It fires with every character change.

(Objective C) textField:shouldChangeCharactersInRange:replacementString:
(Swift) textField(_:shouldChangeCharactersInRange:replacementString:)

However THIS ONLY FIRES BEFORE a change is made (indeed, a change is only made if you do return true from here).

Try the following:

print "First is: %f" % (first)
print "Second is: %f" % (second)

I am unsure what answer is. But apart from that, this will be:

print "DONE: %f DIVIDED BY %f EQUALS %f, SWEET MATH BRO!" % (first, second, ans)

There's a lot of text on Format String Specifiers. You can google it and get a list of specifiers. One thing I forgot to note:

If you try this:

print "First is: %s" % (first)

It converts the float value in first to a string. So that would work as well.

Change the .find to .filter...

I faced the same problem and reason was that my app was not live and publicly available.

I added my email id in contact email under setting tabs and make my app live(which previously was disabled to make live).

After making my app live its showing sharing dialogue with proper image, title and description with my app name in bottom.

Cross browser solution for printing pdf from base64 string:

• Chrome: print window is opened
• FF: new tab with pdf is opened
• IE11: open/save prompt is opened

.

const blobPdfFromBase64String = base64String => {
   const byteArray = Uint8Array.from(
     atob(base64String)
       .split('')
       .map(char => char.charCodeAt(0))
   );
  return new Blob([byteArray], { type: 'application/pdf' });
};

const isIE11 = !!(window.navigator && window.navigator.msSaveOrOpenBlob); // or however you want to check it

const printPDF = blob => {
   try {
     isIE11
       ? window.navigator.msSaveOrOpenBlob(blob, 'documents.pdf')
       : printJS(URL.createObjectURL(blob)); // http://printjs.crabbly.com/
   } catch (e) {
     throw PDFError;
   }
};

printPDF(blobPdfFromBase64String(base64String))

BONUS - Opening blob file in new tab for IE11

If you're able to do some preprocessing of the base64 string on the server you could expose it under some url and use the link in printJS :)

For me this worked perfectly fine .

 Intent intent=new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
 startActivity(intent);

and add this permission to mainfest file:

<uses-permission android:name="android.permission.CAMERA">

It opens the camera,after capturing the image it saves the image to gallery with a new image set.

use \t instead of space.

bw.write("\t"); 

Well, it partly depends what you want to happen if you're actually in a derived class.

For example, suppose SuperClass is in A.jar and SubClass is in B.jar, and you're executing code in an instance method declared in SuperClass but where this refers to an instance of SubClass. If you use this.getClass().getResource() it will look relative to SubClass, in B.jar. I suspect that's usually not what's required.

Personally I'd probably use Foo.class.getResourceAsStream(name) most often - if you already know the name of the resource you're after, and you're sure of where it is relative to Foo, that's the most robust way of doing it IMO.

Of course there are times when that's not what you want, too: judge each case on its merits. It's just the "I know this resource is bundled with this class" is the most common one I've run into.

@praneeth-nidarshan has covered mostly all the steps, except some:

• Check if you have pear installed (or install):

$ sudo apt-get install php-pear

• Install, if isn't already installed, php7.2-dev, in order to avoid the error:

sh: phpize: not found

ERROR: `phpize’ failed

$ sudo apt-get install php7.2-dev

• Install mcrypt using pecl:

$ sudo pecl install mcrypt-1.0.1

• Add the extention extension=mcrypt.so to your php.ini configuration file; if you don't know where it is, search with:

$ sudo php -i | grep 'Configuration File'

Under Visual Studio 2008, it defaults to an __int64 unless you define _USE_32BIT_TIME_T. You're better off just pretending that you don't know what it's defined as, since it can (and will) change from platform to platform.

Try removing the last / at the end of the directory path to exclude

tar -pczf MyBackup.tar.gz /home/user/public_html/ --exclude "/home/user/public_html/tmp" 

If your query consists only of the $where operator, you can pass in just the JavaScript expression:

db.T.find("this.Grade1 > this.Grade2");

For greater performance, run an aggregate operation that has a $redact pipeline to filter the documents which satisfy the given condition.

The $redact pipeline incorporates the functionality of $project and $match to implement field level redaction where it will return all documents matching the condition using $$KEEP and removes from the pipeline results those that don't match using the $$PRUNE variable.

Running the following aggregate operation filter the documents more efficiently than using $where for large collections as this uses a single pipeline and native MongoDB operators, rather than JavaScript evaluations with $where, which can slow down the query:

db.T.aggregate([
    {
        "$redact": {
            "$cond": [
                { "$gt": [ "$Grade1", "$Grade2" ] },
                "$$KEEP",
                "$$PRUNE"
            ]
        }
    }
])

which is a more simplified version of incorporating the two pipelines $project and $match:

db.T.aggregate([
    {
        "$project": {
            "isGrade1Greater": { "$cmp": [ "$Grade1", "$Grade2" ] },
            "Grade1": 1,
            "Grade2": 1,
            "OtherFields": 1,
            ...
        }
    },
    { "$match": { "isGrade1Greater": 1 } }
])

With MongoDB 3.4 and newer:

db.T.aggregate([
    {
        "$addFields": {
            "isGrade1Greater": { "$cmp": [ "$Grade1", "$Grade2" ] }
        }
    },
    { "$match": { "isGrade1Greater": 1 } }
])

CMP subtracts the operands and sets the flags. Namely, it sets the zero flag if the difference is zero (operands are equal).

TEST sets the zero flag, ZF, when the result of the AND operation is zero. If two operands are equal, their bitwise AND is zero when both are zero. TEST also sets the sign flag, SF, when the most significant bit is set in the result, and the parity flag, PF, when the number of set bits is even.

JE [Jump if Equals] tests the zero flag and jumps if the flag is set. JE is an alias of JZ [Jump if Zero] so the disassembler cannot select one based on the opcode. JE is named such because the zero flag is set if the arguments to CMP are equal.

So,

TEST %eax, %eax
JE   400e77 <phase_1+0x23>

jumps if the %eax is zero.

Update for RxJS 6 (April 2018)

It is now perfectly fine to import directly from rxjs. (As can be seen in Angular 6+). Importing from rxjs/operators is also fine and it is actually no longer possible to import operators globally (one of major reasons for refactoring rxjs 6 and the new approach using pipe). Thanks to this treeshaking can now be used as well.

Sample code from rxjs repo:

import { Observable, Subject, ReplaySubject, from, of, range } from 'rxjs';
import { map, filter, switchMap } from 'rxjs/operators';

range(1, 200)
  .pipe(filter(x => x % 2 === 1), map(x => x + x))
  .subscribe(x => console.log(x));

Backwards compatibility for rxjs < 6?

rxjs team released a compatibility package on npm that is pretty much install & play. With this all your rxjs 5.x code should run without any issues. This is especially useful now when most of the dependencies (i.e. modules for Angular) are not yet updated.

The above answer did not work for me. The registry entries would just be automatically re-added when I opened the solution in Visual Studio. I found the resolution in one of the links in Matthews answer though so credit still goes to him for the correct answer.

Remove Git binding from Visual Studio 2013 solution?

Remove the hidden .git folder in your solutionfolder.

I also removed the .gitattributes and .gitignore files just to keep my folder clean.

What you're looking for is componentWillMount.

From the documentation:

Invoked once, both on the client and server, immediately before the initial rendering occurs. If you call setState within this method, render() will see the updated state and will be executed only once despite the state change.

So you would do something like this:

componentWillMount : function () {
    var data = this.getData();
    this.setState({data : data});
},

This way, render() will only be called once, and you'll have the data you're looking for in the initial render.

If the number of files you want to view fits within the maximum argument limit you can use globbing to get what you want, with recursion if you have globstar support.

For exactly 2 layers deep use: ls -d * */*

With globstar, for recursion use: ls -d **/*

The -d argument to ls tells it not to recurse directories passed as arguments (since you are using the shell globbing to do the recursion). This prevents ls using its recursion formatting.

There might be neater methods, but the following could be one approach:

SELECT    t.fk,
          (
             SELECT t1.Field1 
             FROM   `table` t1 
             WHERE  t1.fk = t.fk AND t1.Field1 IS NOT NULL
             LIMIT  1
          ) Field1,
          (
             SELECT t2.Field2
             FROM   `table` t2 
             WHERE  t2.fk = t.fk AND t2.Field2 IS NOT NULL
             LIMIT  1
          ) Field2
FROM      `table` t
WHERE     t.fk = 3
GROUP BY  t.fk;

Test Case:

CREATE TABLE `table` (fk int, Field1 varchar(10), Field2 varchar(10));

INSERT INTO `table` VALUES (3, 'ABC', NULL);
INSERT INTO `table` VALUES (3, NULL, 'DEF');
INSERT INTO `table` VALUES (4, 'GHI', NULL);
INSERT INTO `table` VALUES (4, NULL, 'JKL');
INSERT INTO `table` VALUES (5, NULL, 'MNO');

Result:

+------+--------+--------+
| fk   | Field1 | Field2 |
+------+--------+--------+
|    3 | ABC    | DEF    |
+------+--------+--------+
1 row in set (0.01 sec)

Running the same query without the WHERE t.fk = 3 clause, it would return the following result-set:

+------+--------+--------+
| fk   | Field1 | Field2 |
+------+--------+--------+
|    3 | ABC    | DEF    |
|    4 | GHI    | JKL    |
|    5 | NULL   | MNO    |
+------+--------+--------+
3 rows in set (0.01 sec)