removing JAVA_HOME and JAVA_JRE from environment variable is resolved the issue.

You can use // instead of single /. That converts to int directly.

Well Many people give their answer, some answer is same, some answer id different. I try many answer but they are did not work for me, of course I try from above answer also but did not solve my issue. And I don't know why but I have the same error even my issue solved by this ANSWER. I just want to write it might be helpful for someone.

This error comes when you have not made migrations to your newly created table, So,firsty write command on cmd as: python manage.py makemigrations and then write another command for applying these migrations made by makemigrations command: python manage.py migrate

I was running on Win7, Tomcat7 with maven-pom setup on Eclipse Mars with maven project enabled. On a NOT running server I only had to change from 3.1 to 3.0 on this screen:

For me it was important to have Dynamic Web Module disabled! Then change the version and then enable Dynamic Web Module again.

You don't need to change the delimiter to display the right part of the string with cut.

The -f switch of the cut command is the n-TH element separated by your delimiter : :, so you can just type :

 grep puddle2_1557936 | cut -d ":" -f2

Another solutions (adapt it a bit) if you want fun :

Using grep :

grep -oP 'puddle2_1557936:\K.*' <<< 'puddle2_1557936:/home/rogers.williams/folderz/puddle2'                                                                        
/home/rogers.williams/folderz/puddle2

or still with look around regex

grep -oP '(?<=puddle2_1557936:).*' <<< 'puddle2_1557936:/home/rogers.williams/folderz/puddle2'                                                                    
/home/rogers.williams/folderz/puddle2

or with perl :

perl -lne '/puddle2_1557936:(.*)/ and print $1' <<< 'puddle2_1557936:/home/rogers.williams/folderz/puddle2'                                                      
/home/rogers.williams/folderz/puddle2

or using ruby (thanks to glenn jackman)

ruby -F: -ane '/puddle2_1557936/ and puts $F[1]' <<< 'puddle2_1557936:/home/rogers.williams/folderz/puddle2'
/home/rogers.williams/folderz/puddle2

or with awk :

awk -F'puddle2_1557936:' '{print $2}'  <<< 'puddle2_1557936:/home/rogers.williams/folderz/puddle2'
/home/rogers.williams/folderz/puddle2

or with python :

python -c 'import sys; print(sys.argv[1].split("puddle2_1557936:")[1])' 'puddle2_1557936:/home/rogers.williams/folderz/puddle2'
/home/rogers.williams/folderz/puddle2

or using only bash :

IFS=: read _ a <<< "puddle2_1557936:/home/rogers.williams/folderz/puddle2"
echo "$a"
/home/rogers.williams/folderz/puddle2

or using js in a shell :

js<<EOF
var x = 'puddle2_1557936:/home/rogers.williams/folderz/puddle2'
print(x.substr(x.indexOf(":")+1))
EOF
/home/rogers.williams/folderz/puddle2

or using php in a shell :

php -r 'preg_match("/puddle2_1557936:(.*)/", $argv[1], $m); echo "$m[1]\n";' 'puddle2_1557936:/home/rogers.williams/folderz/puddle2' 
/home/rogers.williams/folderz/puddle2

Imagine you end up with double dashes, and want to replace them with a single character and not doubles of the replace character. You can just use array split and array filter and array join.

var str = "This-is---a--news-----item----";

Then to replace all dashes with single spaces, you could do this:

var newStr = str.split('-').filter(function(item) {
  item = item ? item.replace(/-/g, ''): item
  return item;
}).join(' ');

Now if the string contains double dashes, like '----' then array split will produce an element with 3 dashes in it (because it split on the first dash). So by using this line:

item = item ? item.replace(/-/g, ''): item

The filter method removes those extra dashes so the element will be ignored on the filter iteration. The above line also accounts for if item is already an empty element so it doesn't crash on item.replace.

Then when your string join runs on the filtered elements, you end up with this output:

"This is a news item"

Now if you were using something like knockout.js where you can have computer observables. You could create a computed observable to always calculate "newStr" when "str" changes so you'd always have a version of the string with no dashes even if you change the value of the original input string. Basically they are bound together. I'm sure other JS frameworks can do similar things.

you can send the original array to a method for example:

after that you create a new array to hold the reversed elements

public static void reverse(int[] a){

int[] reversedArray = new int[a.length];

for(int i = 0 ; i<a.length; i++){
reversedArray[i] = a[a.length -1 -i];


}

You need to join the two tables and then filter the result in where clause:

SELECT country.name as country, country.headofstate 
from country
inner join city on city.id = country.capital
where city.population > 100000
and country.headofstate like 'A%'

public class ReverseString{

private static  String reverse(String text, String reverseStr){
    if(text == null || text.length() == 0){
        return reverseStr;
    }
    return reverse(text.substring(1), text.charAt(0)+reverseStr);
}
public static void main(String [] args){
    System.out.println(reverse("hello", "")); //output is "olleh"
}

}

Documentation here, and I'll use the Frankfurt region as an example.

There are 2 different URL styles:

• Virtual host style: https://BUCKET.s3.amazonaws.com/FILE
• Path style: https://s3.eu-central-1.amazonaws.com/BUCKET/FILE

But this url does not work:

• https://s3.amazonaws.com/BUCKET/FILE

The message is explicit: The bucket you are attempting to access must be addressed using the specified endpoint. Please send all future requests to this endpoint.

I may be talking about another problem because I'm not getting NoSuchKey error but I suspect the error message has been made clearer over time.

I will expand on the earlier answer about np.fliplr(). Here is some code that demonstrates constructing a 1d array, transforming it into a 2d array, flipping it, then converting back into a 1d array. time.clock() will be used to keep time, which is presented in terms of seconds.

import time
import numpy as np

start = time.clock()
x = np.array(range(3))
#transform to 2d
x = np.atleast_2d(x)
#flip array
x = np.fliplr(x)
#take first (and only) element
x = x[0]
#print x
end = time.clock()
print end-start

With print statement uncommented:

[2 1 0]
0.00203907123594

With print statement commented out:

5.59799927506e-05

So, in terms of efficiency, I think that's decent. For those of you that love to do it in one line, here is that form.

np.fliplr(np.atleast_2d(np.array(range(3))))[0]

Just because the accepted answer is not self contained:

Support code:

public interface EnumWithCode<E extends Enum<E> & EnumWithCode<E>> {

    public Integer getCode();

    E fromCode(Integer code);
}


public class EnumWithCodeMap<V extends Enum<V> & EnumWithCode<V>> {

    private final HashMap<Integer, V> _map = new HashMap<Integer, V>();

    public EnumWithCodeMap(Class<V> valueType) {
        for( V v : valueType.getEnumConstants() )
            _map.put(v.getCode(), v);
    }

    public V get(Integer num) {
        return _map.get(num);
    }
}

Example of use:

public enum State implements EnumWithCode<State> {
    NOT_STARTED(0), STARTED(1), ENDED(2);

    private static final EnumWithCodeMap<State> map = new EnumWithCodeMap<State>(
            State.class);

    private final int code;

    private State(int code) {
        this.code = code;
    }

    @Override
    public Integer getCode() {
        return code;
    }

    @Override
    public State fromCode(Integer code) {
        return map.get(code);
    }

}

Well, you could look it up in Wikipedia... But since you want an explanation, I'll do my best here:

Hash Functions

They provide a mapping between an arbitrary length input, and a (usually) fixed length (or smaller length) output. It can be anything from a simple crc32, to a full blown cryptographic hash function such as MD5 or SHA1/2/256/512. The point is that there's a one-way mapping going on. It's always a many:1 mapping (meaning there will always be collisions) since every function produces a smaller output than it's capable of inputting (If you feed every possible 1mb file into MD5, you'll get a ton of collisions).

The reason they are hard (or impossible in practicality) to reverse is because of how they work internally. Most cryptographic hash functions iterate over the input set many times to produce the output. So if we look at each fixed length chunk of input (which is algorithm dependent), the hash function will call that the current state. It will then iterate over the state and change it to a new one and use that as feedback into itself (MD5 does this 64 times for each 512bit chunk of data). It then somehow combines the resultant states from all these iterations back together to form the resultant hash.

Now, if you wanted to decode the hash, you'd first need to figure out how to split the given hash into its iterated states (1 possibility for inputs smaller than the size of a chunk of data, many for larger inputs). Then you'd need to reverse the iteration for each state. Now, to explain why this is VERY hard, imagine trying to deduce a and b from the following formula: 10 = a + b. There are 10 positive combinations of a and b that can work. Now loop over that a bunch of times: tmp = a + b; a = b; b = tmp. For 64 iterations, you'd have over 10^64 possibilities to try. And that's just a simple addition where some state is preserved from iteration to iteration. Real hash functions do a lot more than 1 operation (MD5 does about 15 operations on 4 state variables). And since the next iteration depends on the state of the previous and the previous is destroyed in creating the current state, it's all but impossible to determine the input state that led to a given output state (for each iteration no less). Combine that, with the large number of possibilities involved, and decoding even an MD5 will take a near infinite (but not infinite) amount of resources. So many resources that it's actually significantly cheaper to brute-force the hash if you have an idea of the size of the input (for smaller inputs) than it is to even try to decode the hash.

Encryption Functions

They provide a 1:1 mapping between an arbitrary length input and output. And they are always reversible. The important thing to note is that it's reversible using some method. And it's always 1:1 for a given key. Now, there are multiple input:key pairs that might generate the same output (in fact there usually are, depending on the encryption function). Good encrypted data is indistinguishable from random noise. This is different from a good hash output which is always of a consistent format.

Use Cases

Use a hash function when you want to compare a value but can't store the plain representation (for any number of reasons). Passwords should fit this use-case very well since you don't want to store them plain-text for security reasons (and shouldn't). But what if you wanted to check a filesystem for pirated music files? It would be impractical to store 3 mb per music file. So instead, take the hash of the file, and store that (md5 would store 16 bytes instead of 3mb). That way, you just hash each file and compare to the stored database of hashes (This doesn't work as well in practice because of re-encoding, changing file headers, etc, but it's an example use-case).

Use a hash function when you're checking validity of input data. That's what they are designed for. If you have 2 pieces of input, and want to check to see if they are the same, run both through a hash function. The probability of a collision is astronomically low for small input sizes (assuming a good hash function). That's why it's recommended for passwords. For passwords up to 32 characters, md5 has 4 times the output space. SHA1 has 6 times the output space (approximately). SHA512 has about 16 times the output space. You don't really care what the password was, you care if it's the same as the one that was stored. That's why you should use hashes for passwords.

Use encryption whenever you need to get the input data back out. Notice the word need. If you're storing credit card numbers, you need to get them back out at some point, but don't want to store them plain text. So instead, store the encrypted version and keep the key as safe as possible.

Hash functions are also great for signing data. For example, if you're using HMAC, you sign a piece of data by taking a hash of the data concatenated with a known but not transmitted value (a secret value). So, you send the plain-text and the HMAC hash. Then, the receiver simply hashes the submitted data with the known value and checks to see if it matches the transmitted HMAC. If it's the same, you know it wasn't tampered with by a party without the secret value. This is commonly used in secure cookie systems by HTTP frameworks, as well as in message transmission of data over HTTP where you want some assurance of integrity in the data.

A note on hashes for passwords:

A key feature of cryptographic hash functions is that they should be very fast to create, and very difficult/slow to reverse (so much so that it's practically impossible). This poses a problem with passwords. If you store sha512(password), you're not doing a thing to guard against rainbow tables or brute force attacks. Remember, the hash function was designed for speed. So it's trivial for an attacker to just run a dictionary through the hash function and test each result.

Adding a salt helps matters since it adds a bit of unknown data to the hash. So instead of finding anything that matches md5(foo), they need to find something that when added to the known salt produces md5(foo.salt) (which is very much harder to do). But it still doesn't solve the speed problem since if they know the salt it's just a matter of running the dictionary through.

So, there are ways of dealing with this. One popular method is called key strengthening (or key stretching). Basically, you iterate over a hash many times (thousands usually). This does two things. First, it slows down the runtime of the hashing algorithm significantly. Second, if implemented right (passing the input and salt back in on each iteration) actually increases the entropy (available space) for the output, reducing the chances of collisions. A trivial implementation is:

var hash = password + salt;
for (var i = 0; i < 5000; i++) {
    hash = sha512(hash + password + salt);
}

There are other, more standard implementations such as PBKDF2, BCrypt. But this technique is used by quite a few security related systems (such as PGP, WPA, Apache and OpenSSL).

The bottom line, hash(password) is not good enough. hash(password + salt) is better, but still not good enough... Use a stretched hash mechanism to produce your password hashes...

Another note on trivial stretching

Do not under any circumstances feed the output of one hash directly back into the hash function:

hash = sha512(password + salt); 
for (i = 0; i < 1000; i++) {
    hash = sha512(hash); // <-- Do NOT do this!
}

The reason for this has to do with collisions. Remember that all hash functions have collisions because the possible output space (the number of possible outputs) is smaller than then input space. To see why, let's look at what happens. To preface this, let's make the assumption that there's a 0.001% chance of collision from sha1() (it's much lower in reality, but for demonstration purposes).

hash1 = sha1(password + salt);

Now, hash1 has a probability of collision of 0.001%. But when we do the next hash2 = sha1(hash1);, all collisions of hash1 automatically become collisions of hash2. So now, we have hash1's rate at 0.001%, and the 2nd sha1() call adds to that. So now, hash2 has a probability of collision of 0.002%. That's twice as many chances! Each iteration will add another 0.001% chance of collision to the result. So, with 1000 iterations, the chance of collision jumped from a trivial 0.001% to 1%. Now, the degradation is linear, and the real probabilities are far smaller, but the effect is the same (an estimation of the chance of a single collision with md5 is about 1/(2¹²⁸) or 1/(3x10³⁸). While that seems small, thanks to the birthday attack it's not really as small as it seems).

Instead, by re-appending the salt and password each time, you're re-introducing data back into the hash function. So any collisions of any particular round are no longer collisions of the next round. So:

hash = sha512(password + salt);
for (i = 0; i < 1000; i++) {
    hash = sha512(hash + password + salt);
}

Has the same chance of collision as the native sha512 function. Which is what you want. Use that instead.

This works very well for me -- it flips axes on all charts and then flips them back, which causes them to refresh without changing at all.

'Refresh all charts
For Each mysheet In ActiveWorkbook.Sheets
    mysheet.Activate
    For Each mychart In ActiveSheet.ChartObjects
        mychart.Activate
        ActiveChart.PlotArea.Select
        ActiveChart.PlotBy = xlRows
        ActiveChart.PlotBy = xlColumns
        ActiveChart.PlotBy = xlRows
    Next
Next

I find the following solution simpler than the other bit fiddling algorithms I've seen in here.

unsigned char reverse_byte(char a)
{

  return ((a & 0x1)  << 7) | ((a & 0x2)  << 5) |
         ((a & 0x4)  << 3) | ((a & 0x8)  << 1) |
         ((a & 0x10) >> 1) | ((a & 0x20) >> 3) |
         ((a & 0x40) >> 5) | ((a & 0x80) >> 7);
}

It gets every bit in the byte, and shifts it accordingly, starting from the first to the last.

Explanation:

   ((a & 0x1) << 7) //get first bit on the right and shift it into the first left position 
 | ((a & 0x2) << 5) //add it to the second bit and shift it into the second left position
  //and so on

Telerik today released a Beta of their own decompilation tool, JustDecompile. Closed source, but free and looks promising.

Unrelated to the question (Mehrdad's answer should get you going), and I hope this isn't taken as nitpicky: classes don't inherit interfaces, they implement them.

.NET does not support multiple-inheritance, so keeping the terms straight can help in communication. A class can inherit from one superclass and can implement as many interfaces as it wishes.

In response to Eric's comment... I had a discussion with another developer about whether or not interfaces "inherit", "implement", "require", or "bring along" interfaces with a declaration like:

public interface ITwo : IOne

The technical answer is that ITwo does inherit IOne for a few reasons:

• Interfaces never have an implementation, so arguing that ITwo implements IOne is flat wrong
• ITwo inherits IOne methods, if MethodOne() exists on IOne then it is also accesible from ITwo. i.e: ((ITwo)someObject).MethodOne()) is valid, even though ITwo does not explicitly contain a definition for MethodOne()
• ...because the runtime says so! typeof(IOne).IsAssignableFrom(typeof(ITwo)) returns true

We finally agreed that interfaces support true/full inheritance. The missing inheritance features (such as overrides, abstract/virtual accessors, etc) are missing from interfaces, not from interface inheritance. It still doesn't make the concept simple or clear, but it helps understand what's really going on under the hood in Eric's world :-)

What causes a "broken pipe", and more importantly, is it possible to recover from that state?

It is caused by something causing the connection to close. (It is not your application that closed the connection: that would have resulted in a different exception.)

It is not possible to recover the connection. You need to open a new one.

If it cannot be recovered, it seems this would be a good sign that an irreversible problem has occurred and that I should simply close this socket connection. Is that a reasonable assumption?

Yes it is. Once you've received that exception, the socket won't ever work again. Closing it is is the only sensible thing to do.

Is there ever a time when this IOException would occur while the socket connection is still being properly connected in the first place (rather than a working connection that failed at some point)?

No. (Or at least, not without subverting proper behavior of the OS'es network stack, the JVM and/or your application.)

Is it wise to always call SocketChannel.isConnected() before attempting a SocketChannel.write() ...

In general, it is a bad idea to call r.isXYZ() before some call that uses the (external) resource r. There is a small chance that the state of the resource will change between the two calls. It is a better idea to do the action, catch the IOException (or whatever) resulting from the failed action and take whatever remedial action is required.

In this particular case, calling isConnected() is pointless. The method is defined to return true if the socket was connected at some point in the past. It does not tell you if the connection is still live. The only way to determine if the connection is still alive is to attempt to use it; e.g. do a read or write.

Integer.MAX_VALUE is max size of string + depends of your memory size but the Problem on sphere's online judge you don't have to use those functions

You can put your (len/2) test in the for loop:

for(i = 0,k=len-1 ; i < (len/2); i++,k--)
{
        temp = str[k];
        str[k] = str[i];
        str[i] = temp;

}

Since you're comfortable spawning external processes from your code, you could use tee itself. I don't know of any Unix system calls that do exactly what tee does.

# Note this version was written circa Python 2.6, see below for
# an updated 3.3+-compatible version.
import subprocess, os, sys

# Unbuffer output (this ensures the output is in the correct order)
sys.stdout = os.fdopen(sys.stdout.fileno(), 'w', 0)

tee = subprocess.Popen(["tee", "log.txt"], stdin=subprocess.PIPE)
os.dup2(tee.stdin.fileno(), sys.stdout.fileno())
os.dup2(tee.stdin.fileno(), sys.stderr.fileno())

print "\nstdout"
print >>sys.stderr, "stderr"
os.spawnve("P_WAIT", "/bin/ls", ["/bin/ls"], {})
os.execve("/bin/ls", ["/bin/ls"], os.environ)

You could also emulate tee using the multiprocessing package (or use processing if you're using Python 2.5 or earlier).

Update

Here is a Python 3.3+-compatible version:

import subprocess, os, sys

tee = subprocess.Popen(["tee", "log.txt"], stdin=subprocess.PIPE)
# Cause tee's stdin to get a copy of our stdin/stdout (as well as that
# of any child processes we spawn)
os.dup2(tee.stdin.fileno(), sys.stdout.fileno())
os.dup2(tee.stdin.fileno(), sys.stderr.fileno())

# The flush flag is needed to guarantee these lines are written before
# the two spawned /bin/ls processes emit any output
print("\nstdout", flush=True)
print("stderr", file=sys.stderr, flush=True)

# These child processes' stdin/stdout are 
os.spawnve("P_WAIT", "/bin/ls", ["/bin/ls"], {})
os.execve("/bin/ls", ["/bin/ls"], os.environ)

package com.mypackage;
class list{

    node first;    
    node last;

    list(){
    first=null;
    last=null;
}

/*returns true if first is null*/
public boolean isEmpty(){
    return first==null;
}
/*Method for insertion*/

public void insert(int value){

    if(isEmpty()){
        first=last=new node(value);
        last.next=null;
    }
    else{
        node temp=new node(value);
        last.next=temp;
        last=temp;
        last.next=null;
    }

}
/*simple traversal from beginning*/
public void traverse(){
    node t=first;
    while(!isEmpty() && t!=null){
        t.printval();
        t= t.next;
    }
}
/*static method for creating a reversed linked list*/
public static void reverse(node n,list l1){

    if(n.next!=null)
        reverse(n.next,l1);/*will traverse to the very end*/
    l1.insert(n.value);/*every stack frame will do insertion now*/

}
/*private inner class node*/
private class node{
    int value;
    node next;
    node(int value){
        this.value=value;
    }
    void printval(){
        System.out.print(value+" ");
    }
}

 }

Below is the answer in swift. It reads number from left and right side and compare them if they are same. Doing this way we will never face a problem of integer overflow (which can occure on reversing number method) as we are not creating another number.

Steps:

1. Get length of number
2. Loop from length + 1(first) --> 0
3. Get ith digit & get last digit
4. if both digits are not equal return false as number is not palindrome
5. i --
6. discard last digit from num (num = num / 10)

7. end of loo return true

   func isPalindrom(_ input: Int) -> Bool {
          if input < 0 {
               return false
           }
   
           if input < 10 {
               return true
           }
   
           var num = input
           let length = Int(log10(Float(input))) + 1
           var i = length
   
           while i > 0 && num > 0 {
   
               let ithDigit = (input / Int(pow(10.0, Double(i) - 1.0)) ) % 10
               let r = Int(num % 10)
   
               if ithDigit != r {
                   return false
               }
   
               num = num / 10
               i -= 1
           }
   
           return true
       }
   

The other way to update from a select statement:

UPDATE A
SET A.col = A.col,B.col1 = B.col1
FROM  first_Table AS A
INNER JOIN second_Table AS B  ON A.id = B.id WHERE A.col2 = 'cool'

I've found the following "pattern" to be very useful:

MainCtrl.$inject = ['$scope', '$rootScope', '$location', 'socket', ...];
function MainCtrl (scope, rootscope, location, thesocket, ...) {

where, MainCtrl is a controller. I am uncomfortable relying on the parameter names of the Controller function doing a one-for-one mimic of the instances for fear that I might change names and muck things up. I much prefer explicitly using $inject for this purpose.

How does your .NET Webservice look like?

I had the same effect using ksoap 2.3 from code.google.com. I followed the tutorial on The Code Project (which is great BTW.)

And everytime I used

    Integer result = (Integer)envelope.getResponse();

to get the result of a my webservice (regardless of the type, I tried Object, String, int) I ran into the org.ksoap2.serialization.SoapPrimitive exception.

I found a solution (workaround). The first thing I had to do was to remove the "SoapRpcMethod() attribute from my webservice methods.

    [SoapRpcMethod(), WebMethod]
    public Object GetInteger1(int i)
    {
        // android device will throw exception
        return 0;
    }

    [WebMethod]
    public Object GetInteger2(int i)
    {
        // android device will get the value
        return 0;
    }

Then I changed my Android code to:

    SoapPrimitive result = (SoapPrimitive)envelope.getResponse();

However, I get a SoapPrimitive object, which has a "value" filed that is private. Luckily the value is passed through the toString() method, so I use Integer.parseInt(result.toString()) to get my value, which is enough for me, because I don't have any complex types that I need to get from my Web service.

Here is the full source:

private static final String SOAP_ACTION = "http://tempuri.org/GetInteger2";
private static final String METHOD_NAME = "GetInteger2";
private static final String NAMESPACE = "http://tempuri.org/";
private static final String URL = "http://10.0.2.2:4711/Service1.asmx";

public int GetInteger2() throws IOException, XmlPullParserException {
    SoapObject request = new SoapObject(NAMESPACE, METHOD_NAME);

    PropertyInfo pi = new PropertyInfo();
    pi.setName("i");
    pi.setValue(123);
    request.addProperty(pi);

    SoapSerializationEnvelope envelope =
        new SoapSerializationEnvelope(SoapEnvelope.VER11);
    envelope.dotNet = true;
    envelope.setOutputSoapObject(request);

    AndroidHttpTransport androidHttpTransport = new AndroidHttpTransport(URL);
    androidHttpTransport.call(SOAP_ACTION, envelope);

    SoapPrimitive result = (SoapPrimitive)envelope.getResponse();
    return Integer.parseInt(result.toString());
}

Well, while googling about this throw specification, I had a look at this article :- (http://blogs.msdn.com/b/larryosterman/archive/2006/03/22/558390.aspx)

I am reproducing a part of it here also, so that it can be used in future irrespective of the fact that the above link works or not.

   class MyClass
   {
    size_t CalculateFoo()
    {
        :
        :
    };
    size_t MethodThatCannotThrow() throw()
    {
        return 100;
    };
    void ExampleMethod()
    {
        size_t foo, bar;
        try
        {
            foo = CalculateFoo();
            bar = foo * 100;
            MethodThatCannotThrow();
            printf("bar is %d", bar);
        }
        catch (...)
        {
        }
    }
};

When the compiler sees this, with the "throw()" attribute, the compiler can completely optimize the "bar" variable away, because it knows that there is no way for an exception to be thrown from MethodThatCannotThrow(). Without the throw() attribute, the compiler has to create the "bar" variable, because if MethodThatCannotThrow throws an exception, the exception handler may/will depend on the value of the bar variable.

In addition, source code analysis tools like prefast can (and will) use the throw() annotation to improve their error detection capabilities - for example, if you have a try/catch and all the functions you call are marked as throw(), you don't need the try/catch (yes, this has a problem if you later call a function that could throw).

From the shell if you want to show all results you could do db.collection.find().toArray() to get all results without it.

A shorter extension method version

public static string ToIndentedString( this XmlDocument doc )
{
    var stringWriter = new StringWriter(new StringBuilder());
    var xmlTextWriter = new XmlTextWriter(stringWriter) {Formatting = Formatting.Indented};
    doc.Save( xmlTextWriter );
    return stringWriter.ToString();
}

First, Eloquent automatically converts it's timestamps (created_at, updated_at) into carbon objects. You could just use updated_at to get that nice feature, or specify edited_at in your model in the $dates property:

protected $dates = ['edited_at'];

Now back to your actual question. Carbon has a bunch of comparison functions:

• eq() equals
• ne() not equals
• gt() greater than
• gte() greater than or equals
• lt() less than
• lte() less than or equals

Usage:

if($model->edited_at->gt($model->created_at)){
    // edited at is newer than created at
}

This answer: lobby the C# language team for direct language support.

The leading answer states:

Obviously, the concept of an index is foreign to the concept of enumeration, and cannot be done.

While this is true of the current C# language version (2020), this is not a conceptual CLR/Language limit, it can be done.

The Microsoft C# language development team could create a new C# language feature, by adding support for a new Interface IIndexedEnumerable

foreach (var item in collection with var index)
{
    Console.WriteLine("Iteration {0} has value {1}", index, item);
}

//or, building on @user1414213562's answer
foreach (var (item, index) in collection)
{
    Console.WriteLine("Iteration {0} has value {1}", index, item);
}

If foreach () is used and with var index is present, then the compiler expects the item collection to declare IIndexedEnumerable interface. If the interface is absent, the compiler can polyfill wrap the source with an IndexedEnumerable object, which adds in the code for tracking the index.

interface IIndexedEnumerable<T> : IEnumerable<T>
{
    //Not index, because sometimes source IEnumerables are transient
    public long IterationNumber { get; }
}

Later, the CLR can be updated to have internal index tracking, that is only used if with keyword is specified and the source doesn't directly implement IIndexedEnumerable

Why:

• Foreach looks nicer, and in business applications, foreach loops are rarely a performance bottleneck
• Foreach can be more efficient on memory. Having a pipeline of functions instead of converting to new collections at each step. Who cares if it uses a few more CPU cycles when there are fewer CPU cache faults and fewer garbage collections?
• Requiring the coder to add index-tracking code, spoils the beauty
• It's quite easy to implement (please Microsoft) and is backward compatible

While most people here are not Microsoft employees, this is a correct answer, you can lobby Microsoft to add such a feature. You could already build your own iterator with an extension function and use tuples, but Microsoft could sprinkle the syntactic sugar to avoid the extension function

I see you've found your answer, however it didn't work for me. Delete kept returning false, so I tried the following and it worked (For anybody else for whom the chosen answer didn't work):

System.out.println(new File(path).getAbsoluteFile().delete());

The System out can be ignored obviously, I put it for convenience of confirming the deletion.

Don't post the data as an array. To bind to a list, the key/value pairs should be submitted with the same value for each key.

You should not need a form to do this. You just need a list of key/value pairs, which you can include in the call to $.post.

1. Don't press Esc ever. See this answer to learn why. As mentioned above, Ctrl + C is a better alternative. I strongly suggest mapping your Caps Lock key to escape.

2. If you're editing a Ctags compatible language, using a tags file and :ta, Ctrl + ], etc. is a great way to navigate the code, even across multiple files. Also, Ctrl + N and Ctrl + P completion using the tags file is a great way to cut down on keystrokes.

3. If you're editing a line that is wrapped because it's wider than your buffer, you can move up/down using gk and gj.

4. Try to focus on effective use of the motion commands before you learn bad habits. Things like using 'dt' or 'd3w' instead of pressing x a bunch of times. Basically, any time that you find yourself pressing the same key repeatedly, there's probably a better/faster/more concise way of accomplishing the same thing.

Just wrap your WebElement into Select Object as shown below

Select dropdown = new Select(driver.findElement(By.id("identifier")));

Once this is done you can select the required value in 3 ways. Consider an HTML file like this

<html>
<body>
<select id = "designation">
<option value = "MD">MD</option>
<option value = "prog"> Programmer </option>
<option value = "CEO"> CEO </option>
</option>
</select>
<body>
</html>

Now to identify dropdown do

Select dropdown = new Select(driver.findElement(By.id("designation")));

To select its option say 'Programmer' you can do

dropdown.selectByVisibleText("Programmer ");

or

 dropdown.selectByIndex(1);

or

 dropdown.selectByValue("prog");

Happy Coding :)

The previous answers relied on doubling up text and lacked sufficient whitespace.

By using atop and   I was able to get the results I wanted.

This example also includes arrows, a common use case for SVG text labels:

<svg viewBox="-105 -40 210 234">
<title>Size Guide</title>
<defs>
    <filter x="0" y="0" width="1" height="1" id="solid">
        <feFlood flood-color="white"></feFlood>
        <feComposite in="SourceGraphic" operator="atop"></feComposite>
    </filter>
    <marker id="arrow" viewBox="0 0 10 10" refX="5" refY="5" markerWidth="6" markerHeight="6" orient="auto-start-reverse">
        <path d="M 0 0 L 10 5 L 0 10 z"></path>
    </marker>
</defs>
<g id="garment">
    <path id="right-body" fill="none" stroke="black" stroke-width="1" stroke-linejoin="round" d="M0 0 l30 0 l0 154 l-30 0"></path>
    <path id="right-sleeve" d="M30 0 l35 0 l0 120 l-35 0" fill="none" stroke-linejoin="round" stroke="black" stroke-width="1"></path>
    <use id="left-body" href="#right-body" transform="scale(-1,1)"></use>
    <use id="left-sleeve" href="#right-sleeve" transform="scale(-1,1)"></use>
    <path id="collar-right-top" fill="none" stroke="black" stroke-width="1" stroke-linejoin="round" d="M0 -6.5 l11.75 0 l6.5 6.5"></path>
    <use id="collar-left-top" href="#collar-right-top" transform="scale(-1,1)"></use>
    <path id="collar-left" fill="white" stroke="black" stroke-width="1" stroke-linejoin="round" d="M-11.75 -6.5 l-6.5 6.5 l30 77 l6.5 -6.5 Z"></path>
    <path id="front-right" fill="white" stroke="black" stroke-width="1" d="M18.25 0 L30 0 l0 154 l-41.75 0 l0 -77 Z"></path>
    <line x1="0" y1="0" x2="0" y2="154" stroke="black" stroke-width="1" stroke-dasharray="1 3"></line>
    <use id="collar-right" href="#collar-left" transform="scale(-1,1)"></use>
</g>
<g id="dimension-labels">
    <g id="dimension-sleeve-length">
        <line marker-start="url(#arrow)" marker-end="url(#arrow)" x1="85" y1="0" x2="85" y2="120" stroke="black" stroke-width="1"></line>
        <text font-size="10" filter="url(#solid)" fill="black" x="85" y="60" class="dimension" text-anchor="middle" dominant-baseline="middle"> 120 cm</text>
    </g>
    <g id="dimension-length">
        <line marker-start="url(#arrow)" marker-end="url(#arrow)" x1="-85" y1="0" x2="-85" y2="154" stroke="black" stroke-width="1"></line>
        <text font-size="10" filter="url(#solid)" fill="black" x="-85" y="77" text-anchor="middle" dominant-baseline="middle" class="dimension"> 154 cm</text>
    </g>
    <g id="dimension-sleeve-to-sleeve">
        <line marker-start="url(#arrow)" marker-end="url(#arrow)" x1="-65" y1="-20" x2="65" y2="-20" stroke="black" stroke-width="1"></line>
        <text font-size="10" filter="url(#solid)" fill="black" x="0" y="-20" text-anchor="middle" dominant-baseline="middle" class="dimension">&nbsp;130 cm&nbsp;</text>
    </g>
    <g title="Back Width" id="dimension-back-width">
        <line marker-start="url(#arrow)" marker-end="url(#arrow)" x1="-30" y1="174" x2="30" y2="174" stroke="black" stroke-width="1"></line>
        <text font-size="10" filter="url(#solid)" fill="black" x="0" y="174" text-anchor="middle" dominant-baseline="middle" class="dimension">&nbsp;60 cm&nbsp;</text>
    </g>
</g>
</svg>

This should work:

grep(pattern = 'A1|A9|A6', x = myfile$Letter)

Or even more simply:

library(data.table)
myfile$Letter %like% 'A1|A9|A6'

Here is way to avoid absolute divs and tables if you know parent's height:

<div class="parent">
    <div class="child"> <a href="#">Home</a>
    </div>
</div>

CSS:

.parent {
    line-height:80px;
    border: 1px solid black;
}
.child {
    line-height:normal;
    display: inline-block;
    vertical-align:bottom;
    border: 1px solid red;
}

JsFiddle:

Example

I wrote a simple Powershell script for windows users to map keys to adb shell input events. And controll an Android device remotely over LAN. I don't know if anyone finds it usefull, but I'll share it anyways.

$ip = 192.168.1.8
cd D:\Android\android-sdk-windows\platform-tools\; .\adb.exe disconnect $ip; .\adb.exe connect $ip
$adbKeyNum = @{LeftWindows = "1"; F1 = "3"; Enter = "66"; UpArrow = "19"; DownArrow = "20"; LeftArrow = "21"; RightArrow = "22"; Add = "24";
        Subtract = "25"; Backspace = "4"; P = "26"}

while(1 -eq 1){
    $keyPress = [Console]::ReadKey($true).Key
    if ([string]$keyPress -eq "F10"){
        .\adb.exe disconnect $ip
        exit
    }
    elseif ([string]$keyPress -eq "F6"){
        $string = Read-Host -Prompt 'Input the string: '
        .\adb.exe shell input text $string
    }
    elseif ($adbKeyNum.ContainsKey([string]$keyPress)){
        echo $adbKeyNum.Get_Item([string]$keyPress)
        .\adb.exe shell input keyevent $adbKeyNum.Get_Item([string]$keyPress)
    }
}

Use $_SESSION directly to set variables. Like this:

$_SESSION['name'] = 'stack';

Instead of:

$name = 'stack';
session_register("name");

Read More Here

Use

Console.WriteLine(String.Format("  {0:G17}", i));

That will give you all the 17 digits it have. By default, a Double value contains 15 decimal digits of precision, although a maximum of 17 digits is maintained internally. {0:R} will not always give you 17 digits, it will give 15 if the number can be represented with that precision.

which returns 15 digits if the number can be represented with that precision or 17 digits if the number can only be represented with maximum precision. There isn't any thing you can to do to make the the double return more digits that is the way it's implemented. If you don't like it do a new double class yourself...

.NET's double cant store any more digits than 17 so you cant see 6.89999999999999946709 in the debugger you would see 6.8999999999999995. Please provide an image to prove us wrong.

Right click your project in eclipse, build path -> add external jars.

You can take advantage of the fact that NSUserDefaults are cleared by uninstallation of an app. For example:

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    //Clear keychain on first run in case of reinstallation
    if (![[NSUserDefaults standardUserDefaults] objectForKey:@"FirstRun"]) {
        // Delete values from keychain here
        [[NSUserDefaults standardUserDefaults] setValue:@"1strun" forKey:@"FirstRun"];
        [[NSUserDefaults standardUserDefaults] synchronize];
    }

    //...Other stuff that usually happens in didFinishLaunching
}

This checks for and sets a "FirstRun" key/value in NSUserDefaults on the first run of your app if it's not already set. There's a comment where you should put code to delete values from the keychain. Synchronize can be called to make sure the "FirstRun" key/value is immediately persisted in case the user kills the app manually before the system persists it.

This kind of thing happened to me when I was using php language construct exit; in middle of transaction. Then this transaction "hangs" and you need to kill mysql process (described above with processlist;)

Prior to the introduction of git push -u, there was no git push option to obtain what you desire. You had to add new configuration statements.

If you create a new branch using:

$ git checkout -b branchB
$ git push origin branchB:branchB

You can use the git config command to avoid editing directly the .git/config file.

$ git config branch.branchB.remote origin
$ git config branch.branchB.merge refs/heads/branchB

Or you can edit manually the .git/config file to had tracking information to this branch.

[branch "branchB"]
    remote = origin
    merge = refs/heads/branchB

Transparency is controlled by the alpha channel (AA in #AARRGGBB). Maximal value (255 dec, FF hex) means fully opaque. Minimum value (0 dec, 00 hex) means fully transparent. Values in between are semi-transparent, i.e. the color is mixed with the background color.

To get a fully transparent color set the alpha to zero. RR, GG and BB are irrelevant in this case because no color will be visible. This means #00FFFFFF ("transparent White") is the same color as #00F0F8FF ("transparent AliceBlue"). To keep it simple one chooses black (#00000000) or white (#00FFFFFF) if the color does not matter.

In the table you linked to you'll find Transparent defined as #00FFFFFF.

As @M.Deinum already wrote the answer.

I tried with api /api/v1/signup. it will bypass the filter/custom filter but an additional request invoked by the browser for /favicon.ico, so, I add this also in web.ignoring() and it works for me.

@Override
public void configure(WebSecurity web) throws Exception {
    web.ignoring().antMatchers("/api/v1/signup", "/favicon.ico");
}

Maybe this is not required for the above question.

Use include_once instead.
This error means that you have already included this file.

include_once(LIB.'/class.php');

I had this same problem and had to refer to the php manual which told me the mysql and mysqli extensions require libmysql.dll to load. I searched for it under C:\windows\system32 (windows 7) and could not find, so I downloaded it here and placed it in my C:\windows\system32. I restarted Apache and everything worked fine. Took me 3 days to figure out, hope it helps.

It depends on what the integer is supposed to encode. You could convert the date to a number of milliseconds from some previous time. People often do this affixed to 12:00 am January 1 1970, or 1900, etc., and measure time as an integer number of milliseconds from that point. The datetime module (or others like it) will have functions that do this for you: for example, you can use int(datetime.datetime.utcnow().timestamp()).

If you want to semantically encode the year, month, and day, one way to do it is to multiply those components by order-of-magnitude values large enough to juxtapose them within the integer digits:

2012-06-13 --> 20120613 = 10,000 * (2012) + 100 * (6) + 1*(13)

def to_integer(dt_time):
    return 10000*dt_time.year + 100*dt_time.month + dt_time.day

E.g.

In [1]: import datetime

In [2]: %cpaste
Pasting code; enter '--' alone on the line to stop or use Ctrl-D.
:def to_integer(dt_time):
:    return 10000*dt_time.year + 100*dt_time.month + dt_time.day
:    # Or take the appropriate chars from a string date representation.
:--

In [3]: to_integer(datetime.date(2012, 6, 13))
Out[3]: 20120613

If you also want minutes and seconds, then just include further orders of magnitude as needed to display the digits.

I've encountered this second method very often in legacy systems, especially systems that pull date-based data out of legacy SQL databases.

It is very bad. You end up writing a lot of hacky code for aligning dates, computing month or day offsets as they would appear in the integer format (e.g. resetting the month back to 1 as you pass December, then incrementing the year value), and boiler plate for converting to and from the integer format all over.

Unless such a convention lives in a deep, low-level, and thoroughly tested section of the API you're working on, such that everyone who ever consumes the data really can count on this integer representation and all of its helper functions, then you end up with lots of people re-writing basic date-handling routines all over the place.

It's generally much better to leave the value in a date context, like datetime.date, for as long as you possibly can, so that the operations upon it are expressed in a natural, date-based context, and not some lone developer's personal hack into an integer.

You should use gnuplot and be sure to issue the command "set term dumb" after starting up. You can also give a row and column count. Here is the output from gnuplot if you issue "set term dumb 64 10" and then "plot sin(x)":

 

    1 ++-----------****-----------+--***-------+------****--++
  0.6 *+          **+  *          +**   *      sin(x)*******++
  0.2 +*         *      *         **     **         *     **++
    0 ++*       **       *       **       *       **       *++
 -0.4 ++**     *         **     **         *      *         *+
 -0.8 ++ **   *     +      *   ** +         *  +**          +*
   -1 ++--****------+-------***---+----------****-----------++
     -10           -5             0            5             10

It looks better at 79x24 (don't use the 80th column on an 80x24 display: some curses implementations don't always behave well around the last column).

I'm using gnuplot v4, but this should work on slightly older or newer versions.

Despite answer from CaioToOn above, I still had problems getting this to work initially.

After multiple attempts, finally got it working. Am pasting my final version here - hoping it will benefit somebody else.

    <build> 
        <plugins>
            <!--
            Copy all Maven Dependencies (-MD) into libMD/ folder to use in classpath via shellscript
             --> 
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-dependency-plugin</artifactId>
                <version>2.8</version>
                <executions>
                    <execution>
                        <id>copy</id>
                        <phase>package</phase>
                        <goals>
                            <goal>copy-dependencies</goal>
                        </goals>
                        <configuration>
                            <outputDirectory>${project.build.directory}/libMD</outputDirectory>
                        </configuration>
                    </execution>
                </executions>
            </plugin>
        </plugins>
        <!--  
        Above maven-dependepcy-plugin gives a validation error in m2e. 
        To fix that, add the plugin management step below. Per: http://stackoverflow.com/a/12109018
        -->
        <pluginManagement>
            <plugins>
                <plugin>
                    <groupId>org.eclipse.m2e</groupId>
                    <artifactId>lifecycle-mapping</artifactId>
                    <version>1.0.0</version>
                    <configuration>
                        <lifecycleMappingMetadata>
                            <pluginExecutions>
                                <pluginExecution>
                                    <pluginExecutionFilter>
                                        <groupId>org.apache.maven.plugins</groupId>
                                        <artifactId>maven-dependency-plugin</artifactId>
                                        <versionRange>[2.0,)</versionRange>
                                        <goals>
                                            <goal>copy-dependencies</goal>
                                        </goals>
                                    </pluginExecutionFilter>
                                    <action>
                                        <execute />
                                    </action>
                                </pluginExecution>
                            </pluginExecutions>
                        </lifecycleMappingMetadata>
                    </configuration>
                </plugin>
            </plugins>
        </pluginManagement>
    </build>

For those who like me doing same mistake. Here is the elaborated answer Tested in Laravel 5.7

A. Records in DB

UserFile::orderBy('created_at','desc')->get()->toArray();

Array
(
    [0] => Array
        (
            [id] => 2073
            [type] => 'DL'
            [url] => 'https://i.picsum.photos/12/884/200/300.jpg'
            [created_at] => 2020-08-05 17:16:48
            [updated_at] => 2020-08-06 18:08:38
        )

    [1] => Array
        (
            [id] => 2074
            [type] => 'PROFILE'
            [url] => 'https://i.picsum.photos/13/884/200/300.jpg'
            [created_at] => 2020-08-05 17:20:06
            [updated_at] => 2020-08-06 18:08:38
        )

    [2] => Array
        (
            [id] => 2076
            [type] => 'PROFILE'
            [url] => 'https://i.picsum.photos/13/884/200/300.jpg'
            [created_at] => 2020-08-05 17:22:01
            [updated_at] => 2020-08-06 18:08:38
        )

    [3] => Array
        (
            [id] => 2086
            [type] => 'PROFILE'
            [url] => 'https://i.picsum.photos/13/884/200/300.jpg'
            [created_at] => 2020-08-05 19:22:41
            [updated_at] => 2020-08-06 18:08:38
        )
)

B. Desired Grouped result

UserFile::select('type','url','updated_at)->distinct('type')->get()->toArray();

Array
(
    [0] => Array
        (
            [type] => 'DL'
            [url] => 'https://i.picsum.photos/12/884/200/300.jpg'
            [updated_at] => 2020-08-06 18:08:38 
        )

    [1] => Array
        (
            [type] => 'PROFILE'
            [url] => 'https://i.picsum.photos/13/884/200/300.jpg'
            [updated_at] => 2020-08-06 18:08:38
        )
)

So Pass only those columns in "select()", values of which are same. For example: 'type','url'. You can add more columns provided they have same value like 'updated_at'.

If you try to pass "created_at" or "id" in "select()", then you will get the records same as A. Because they are different for each row in DB.

Using dict.pop:

d = {'some': 'data'}
entries_to_remove = ('any', 'iterable')
for k in entries_to_remove:
    d.pop(k, None)

You need to set basicHttpBinding -> MaxReceivedMessageSize in the client configuration.

Just use:

overflow: hidden;
white-space: nowrap;

In your item's divs

For the sake of completeness...

Say that you really do want to treat the Map values as Lists, but you want to avoid copying the Set into a List each time.

For instance, maybe you are calling one library function that creates a Set, but you are passing your Map<String, List<String>> result to a (poorly-designed but out of your hands) library function that only takes Map<String, List<String>>, even though somehow you know that the operations it does with the Lists are equally applicable to any Collection (and thus any Set). And for some reason you need to avoid the speed/memory overhead of copying each Set to a List.

In this super niche case, depending on the (maybe unknowable) behavior the library function needs out of your Lists, you may be able to create a List view over each Set. Note that this is inherently unsafe (because the library function's requirements from each List could presumably change without you knowing), so another solution should be preferred. But here's how you'd do it.

You'd create a class that implements the List interface, takes a Set in the constructor and assigns that Set to a field, and then uses that internal Set to implement the List API (to the extent possible, and desired).

Note that some List behavior you simply will not be able to imitate without storing the elements as a List, and some behavior you will only partially be able to imitate. Again, this class is not a safe drop-in replacement for Lists in general. In particular, if you know that the use case requires index-related operations or MUTATING the List, this approach would go south very fast.

public class ListViewOfSet<U> implements List<U> {
    private final Set<U> wrappedSet;
    public ListViewOfSet(Set<U> setToWrap) { this.wrappedSet = setToWrap; }

    @Override public int size() { return this.wrappedSet.size(); }
    @Override public boolean isEmpty() { return this.wrappedSet.isEmpty(); }
    @Override public boolean contains(Object o) { return this.wrappedSet.contains(o); }
    @Override public java.util.Iterator<U> iterator() { return this.wrappedSet.iterator(); }
    @Override public Object[] toArray() { return this.wrappedSet.toArray(); }
    @Override public <T> T[] toArray(T[] ts) { return this.wrappedSet.toArray(ts); }
    @Override public boolean add(U e) { return this.wrappedSet.add(e); }
    @Override public boolean remove(Object o) { return this.wrappedSet.remove(o); }
    @Override public boolean containsAll(Collection<?> clctn) { return this.wrappedSet.containsAll(clctn); }
    @Override public boolean addAll(Collection<? extends U> clctn) { return this.wrappedSet.addAll(clctn); }
    @Override public boolean addAll(int i, Collection<? extends U> clctn) { throw new UnsupportedOperationException(); }
    @Override public boolean removeAll(Collection<?> clctn) { return this.wrappedSet.removeAll(clctn); }
    @Override public boolean retainAll(Collection<?> clctn) { return this.wrappedSet.retainAll(clctn); }
    @Override public void clear() { this.wrappedSet.clear(); }
    @Override public U get(int i) { throw new UnsupportedOperationException(); }
    @Override public U set(int i, U e) { throw new UnsupportedOperationException(); }
    @Override public void add(int i, U e) { throw new UnsupportedOperationException(); }
    @Override public U remove(int i) { throw new UnsupportedOperationException(); }
    @Override public int indexOf(Object o) { throw new UnsupportedOperationException(); }
    @Override public int lastIndexOf(Object o) { throw new UnsupportedOperationException(); }
    @Override public ListIterator<U> listIterator() { throw new UnsupportedOperationException(); }
    @Override public ListIterator<U> listIterator(int i) { throw new UnsupportedOperationException(); }
    @Override public List<U> subList(int i, int i1) { throw new UnsupportedOperationException(); }
}

...
Set<String> set = getSet(...);
ListViewOfSet<String> listOfNames = new ListViewOfSet<>(set);
...

You don't need any special library or "dangerous" attribute. You can just use React Refs to manipulate the DOM:

class MyComponent extends React.Component {
    
    constructor(props) {
        
        super(props);       
        this.divRef = React.createRef();
        this.myHTML = "<p>Hello World!</p>"
    }
    
    componentDidMount() {
        
        this.divRef.current.innerHTML = this.myHTML;
    }
    
    render() {
        
        return (
            
            <div ref={this.divRef}></div>
        );
    }
}

A working sample can be found here:

https://codepen.io/bemipefe/pen/mdEjaMK

In Java, char is technically a "16-bit integer", so you can simply cast it to int and you'll get it's code. From Oracle:

The char data type is a single 16-bit Unicode character. It has a minimum value of '\u0000' (or 0) and a maximum value of '\uffff' (or 65,535 inclusive).

So you can simply cast it to int.

char registered = '®';
System.out.println(String.format("This is an int-code: %d", (int) registered));
System.out.println(String.format("And this is an hexa code: %x", (int) registered));

The awk solution is what I would use, but if you want to understand your problems with bash, here is a revised version of your script.

#!/bin/bash -vx

##config file with ip addresses like 10.10.10.1:80
file=config.txt

while read line ; do
  ##this line is not correct, should strip :port and store to ip var
  ip=$( echo "$line" |cut -d\: -f1 )
  ping $ip
done < ${file}

You could write your top line as

for line in $(cat $file) ; do ...

(but not recommended).

You needed command substitution $( ... ) to get the value assigned to $ip

reading lines from a file is usually considered more efficient with the while read line ... done < ${file} pattern.

I hope this helps.

This console warning is not an error or an actual problem — Chrome is just spreading the word about this new standard to increase developer adoption.

It has nothing to do with your code. It is something their web servers will have to support.

Release date for a fix is February 4, 2020 per: https://www.chromium.org/updates/same-site

February, 2020: Enforcement rollout for Chrome 80 Stable: The SameSite-by-default and SameSite=None-requires-Secure behaviors will begin rolling out to Chrome 80 Stable for an initial limited population starting the week of February 17, 2020, excluding the US President’s Day holiday on Monday. We will be closely monitoring and evaluating ecosystem impact from this initial limited phase through gradually increasing rollouts.

For the full Chrome release schedule, see here.

I solved same problem by adding in response header

response.setHeader("Set-Cookie", "HttpOnly;Secure;SameSite=Strict");

SameSite prevents the browser from sending the cookie along with cross-site requests. The main goal is mitigating the risk of cross-origin information leakage. It also provides some protection against cross-site request forgery attacks. Possible values for the flag are Lax or Strict.

SameSite cookies explained here

Please refer this before applying any option.

Hope this helps you.

Requesting Permissions In the following code, we will ask for camera permission:

in java

EasyPermissions is a wrapper library to simplify basic system permissions logic when targeting Android M or higher.

Installation EasyPermissions is installed by adding the following dependency to your build.gradle file:

dependencies {

    // For developers using AndroidX in their applications
    implementation 'pub.devrel:easypermissions:3.0.0'

    // For developers using the Android Support Library
    implementation 'pub.devrel:easypermissions:2.0.1'

}


private void askAboutCamera(){

        EasyPermissions.requestPermissions(
                this,
                "A partir deste ponto a permissão de câmera é necessária.",
                CAMERA_REQUEST_CODE,
                Manifest.permission.CAMERA );
}

I rename my own just by simply :

1. going to github.com on my repository
2. Open Settings Tab
3. The first setting you can see is the "Repository Name"
4. Change the actual one and put the new name you want to give to your repository
5. Click on "Rename" button

After this step, GitHub will make sure that, your online repository matches your local folder name. At this step your problem is solved, unless you also want to rename your local folder. Then do it manually and just use the Github client for windows to refind again your repository into your hard drive, and Github will match it again. That's all! Very simple.

here we can create underline with color in text

<u style="text-decoration-color: red;">The color of the lines should now be red!</u>

or

The color of the lines should now be red!

<h1 style=" text-decoration:underline; text-decoration-color: red;">The color of the lines should now be red!</u>

With Oracle 12, you can use the WITH clause to declare your auxiliary functions. I'm assuming your get_something function returns varchar2:

with
  function get_something_(name varchar2, ignore_notfound number)
  return varchar2 
  is
  begin
    -- Actual function call here
    return get_something(name, not ignore_notfound = 0);
  end get_something_;

  -- Call auxiliary function instead of actual function
select get_something_('NAME', 1) from dual;

Of course, you could have also stored your auxiliary function somewhere in the schema as shown in this answer, but by using WITH, you don't have any external dependencies just to run this query. I've blogged about this technique more in detail here.

If it is only to add a new tuple and you are sure that there are no collisions in the inner dictionary, you can do this:

def addNameToDictionary(d, tup):
    if tup[0] not in d:
        d[tup[0]] = {}
    d[tup[0]][tup[1]] = [tup[2]]

I previously came up with a different workaround that doesn't use stored procedures, but instead uses a parameter table and some connection_id() magic.

EDIT (Copied up from comments)

create a table that contains a column called connection_id (make it a bigint). Place columns in that table for parameters for the view. Put a primary key on the connection_id. replace into the parameter table and use CONNECTION_ID() to populate the connection_id value. In the view use a cross join to the parameter table and put WHERE param_table.connection_id = CONNECTION_ID(). This will cross join with only one row from the parameter table which is what you want. You can then use the other columns in the where clause for example where orders.order_id = param_table.order_id.

It's indeed one of the biggest epic failures in the standard Java API. Have a bit of patience, then you'll get your solution in flavor of the new Date and Time API specified by JSR 310 / ThreeTen which is (most likely) going to be included in the upcoming Java 8.

Until then, you can get away with JodaTime.

DateTime dt1 = new DateTime(2000, 1, 1, 0, 0, 0, 0);
DateTime dt2 = new DateTime(2010, 1, 1, 0, 0, 0, 0);
int days = Days.daysBetween(dt1, dt2).getDays();

Its creator, Stephen Colebourne, is by the way the guy behind JSR 310, so it'll look much similar.

Complate Angular Way ( Set/Get value by Id ):

// In Html tag

 <button (click) ="setValue()">Set Value</button>
 <input type="text"  #userNameId />

// In component .ts File

    export class testUserClass {
       @ViewChild('userNameId') userNameId: ElementRef;

      ngAfterViewInit(){
         console.log(this.userNameId.nativeElement.value );
       }

      setValue(){
        this.userNameId.nativeElement.value = "Sample user Name";
      }



   }

View -> Datasets (bottom of menu, above Refresh)

This problem appear if two software use same port for connecting to the server
try to close the port by cmd according to your operating system
then reboot your Android studio or your Eclipse or your Software.

This works on Ubuntu;

alias composer='/usr/local/bin/composer/composer.phar'

You can try this:

<div id="div1" class="myClass">there is a class</div>
<div id="div2"> there is no class2 </div>

$(document).ready(function(){
    $("#div2").not('.myClass');  // do not have `myClass` class.
});

Text nodes cannot have margins or any other style applied to them, so anything you need style applied to must be in an element. If you want some of the text inside of your element to be styled differently, wrap it in a span or div, for example.

Here is the pure Javascript version of it with LIVE search for ALL COLUMNS :

function search_table(){
  // Declare variables 
  var input, filter, table, tr, td, i;
  input = document.getElementById("search_field_input");
  filter = input.value.toUpperCase();
  table = document.getElementById("table_id");
  tr = table.getElementsByTagName("tr");

  // Loop through all table rows, and hide those who don't match the search query
  for (i = 0; i < tr.length; i++) {
    td = tr[i].getElementsByTagName("td") ; 
    for(j=0 ; j<td.length ; j++)
    {
      let tdata = td[j] ;
      if (tdata) {
        if (tdata.innerHTML.toUpperCase().indexOf(filter) > -1) {
          tr[i].style.display = "";
          break ; 
        } else {
          tr[i].style.display = "none";
        }
      } 
    }
  }
}

The solution discussed here worked well for me. This solution uses built-in cuda functions and is very simple to implement.

The relevant code is copied below:

#include <stdio.h>
#include <stdlib.h>

__global__ void foo(int *ptr)
{
  *ptr = 7;
}

int main(void)
{
  foo<<<1,1>>>(0);

  // make the host block until the device is finished with foo
  cudaDeviceSynchronize();

  // check for error
  cudaError_t error = cudaGetLastError();
  if(error != cudaSuccess)
  {
    // print the CUDA error message and exit
    printf("CUDA error: %s\n", cudaGetErrorString(error));
    exit(-1);
  }

  return 0;
}

Sould look like:

<td colspan ='4'><img src="\Pics\H.gif" alt="" border='3' height='100' width='100' /></td>

.

<td> need to be closed with </td> <img /> is (in most case) an empty tag. The closing tag is replacede by /> instead... like for br's

<br/>

Your html structure is plain worng (sorry), but this will probably turn into a really bad cross-brwoser compatibility. Also, Encapsulate the value of your attributes with quotes and avoid using upercase in tags.

I didn't have a solution, just a workaround.

Windows Vista onwards has an inbuilt command called clip that takes the output of a command from command line and puts it into the clipboard. For example, ipconfig | clip.

So I made a function with the os module which takes a string and adds it to the clipboard using the inbuilt Windows solution.

import os
def addToClipBoard(text):
    command = 'echo ' + text.strip() + '| clip'
    os.system(command)

# Example
addToClipBoard('penny lane')

# Penny Lane is now in your ears, eyes, and clipboard.

As previously noted in the comments however, one downside to this approach is that the echo command automatically adds a newline to the end of your text. To avoid this you can use a modified version of the command:

def addToClipBoard(text):
    command = 'echo | set /p nul=' + text.strip() + '| clip'
    os.system(command)

If you are using Windows XP it will work just following the steps in Copy and paste from Windows XP Pro's command prompt straight to the Clipboard.

Just complementing what Donal Fellows said, you can use List with @RequestParam

public String controllerMethod(@RequestParam(value="myParam") List<ObjectToParse> myParam){
....
}

Hope it helps!

My original answer regarding :nth-of-type is simply wrong. Thanks to Paul for pointing this out.

The word "type" there refers only to the "element type" (like div). It turns out that the selectors div.bar:nth-of-type(2) and div:nth-of-type(2).bar mean the same thing. Both select elements that [a] are the second div of their parent, and [b] have class bar.

So the only pure CSS solution left that I'm aware of, if you want to select all elements of a certain selector except the first, is the general sibling selector:

.bar ~ .bar

http://www.w3schools.com/cssref/sel_gen_sibling.asp

My original (wrong) answer follows:

With the arrival of CSS3, there is another option. It may not have been available when the question was first asked:

.bar:nth-of-type(2)

http://www.w3schools.com/cssref/sel_nth-of-type.asp

This selects the second element that satisfies the .bar selector.

If you want the second and last of a specific kind of element (or all of them except the first), the general sibling selector would also work fine:

.bar ~ .bar

http://www.w3schools.com/cssref/sel_gen_sibling.asp

It's shorter. But of course, we don't like to duplicate code, right? :-)

DSO here means Dynamic Shared Object; since the error message says it's missing from the command line, I guess you have to add it to the command line.

That is, try adding -lpthread to your command line.

You just need to wrap object in ()

var arr = [{_x000D_
  id: 1,_x000D_
  name: 'bill'_x000D_
}, {_x000D_
  id: 2,_x000D_
  name: 'ted'_x000D_
}]_x000D_
_x000D_
var result = arr.map(person => ({ value: person.id, text: person.name }));_x000D_
console.log(result)

I know this is not an ideal question to answer but as the OP seems to be a beginner, I'd love to share some basic knowledge with him... Hope everybody understands

OP, you can convert a string to type Boolean by using any of the methods stated below:

 string sample = "True";
 bool myBool = bool.Parse(sample);

 ///or

 bool myBool = Convert.ToBoolean(sample);

bool.Parse expects one parameter which in this case is sample, .ToBoolean also expects one parameter.

You can use TryParse which is the same as Parse but it doesn't throw any exception :)

  string sample = "false";
  Boolean myBool;

  if (Boolean.TryParse(sample , out myBool))
  {
  }

Please note that you cannot convert any type of string to type Boolean because the value of a Boolean can only be True or False

Hope you understand :)

Use strtotime to convert any date to unix timestamp and compare.

Use this code where ever you want to implement clear datagridview command

datagridview1.datasource= nothing
datagridview1.datasource= ds
dt.clear()               'Dt as new DATATABLE
ds.clear()              'Ds as new Dataset

this code will clear the datagridview and wil stop data duplication when populating data from database.

there is a soap config section in your php.ini file, which control the wsdl access cache, may be shown as:

[soap] 
; Enables or disables WSDL caching feature. 
soap.wsdl_cache_enabled=1 ; 
Sets the directory name where SOAP extension will put cache files. 
soap.wsdl_cache_dir="/tmp" 
; (time to live) Sets the number of second while cached file will be used ; instead of original one.  
soap.wsdl_cache_ttl=86400

if wsdl file cache is enabled, it may cause this problem when changing wsdl URI in php code. in this example, you can just delete file start with wsdl- under /tmp directory. or you just set soap.wsdl_cache_enabled=0; and soap.wsdl_cache_ttl=0; PHP will fetch the wsdl file every-time you visit the page.

In my case, I have Jackson automatically (de)serializing objects that I return from a Spring MVC controller (I am using @RestController with Spring 4.1.6). I had to use com.fasterxml.jackson.annotation.JsonIgnore instead of org.codehaus.jackson.annotate.JsonIgnore, as otherwise, it simply did nothing.

Assuming that it's a TCP (rather than UDP) port that you're trying to use:

1. On the server itself, use netstat -an to check to see which ports are listening.

2. From outside, just use telnet host port (or telnet host:port on Unix systems) to see if the connection is refused, accepted, or timeouts.

On that latter test, then in general:

• connection refused means that nothing is running on that port
• accepted means that something is running on that port
• timeout means that a firewall is blocking access

On Windows 7 or Windows Vista the default option 'telnet' is not recognized as an internal or external command, operable program or batch file. To solve this, just enable it: Click *Start** → Control Panel → Programs → Turn Windows Features on or off. In the list, scroll down and select Telnet Client and click OK.

if you just need it for db-related stuff, some OR Mappers (e.g. NHibernate) support transactinos out of the box per default.

/**
 * @param filePath
 * @param fs
 * @return list of absolute file path present in given path
 * @throws FileNotFoundException
 * @throws IOException
 */
public static List<String> getAllFilePath(Path filePath, FileSystem fs) throws FileNotFoundException, IOException {
    List<String> fileList = new ArrayList<String>();
    FileStatus[] fileStatus = fs.listStatus(filePath);
    for (FileStatus fileStat : fileStatus) {
        if (fileStat.isDirectory()) {
            fileList.addAll(getAllFilePath(fileStat.getPath(), fs));
        } else {
            fileList.add(fileStat.getPath().toString());
        }
    }
    return fileList;
}

Quick Example : Suppose you have the following file structure:

a  ->  b
   ->  c  -> d
          -> e 
   ->  d  -> f

Using the code above, you get:

a/b
a/c/d
a/c/e
a/d/f

If you want only the leaf (i.e. fileNames), use the following code in else block :

 ...
    } else {
        String fileName = fileStat.getPath().toString(); 
        fileList.add(fileName.substring(fileName.lastIndexOf("/") + 1));
    }

This will give:

b
d
e
f

SELECT * INTO table2 FROM table1;

Here is a working version using v3 of docker-compose.yml. The key is the volumes directive:

mysql:
  image: mysql:5.6
  ports:
    - "3306:3306"
  environment:
    MYSQL_ROOT_PASSWORD: root
    MYSQL_USER: theusername
    MYSQL_PASSWORD: thepw
    MYSQL_DATABASE: mydb
  volumes:
    - ./data:/docker-entrypoint-initdb.d

In the directory that I have my docker-compose.yml I have a data dir that contains .sql dump files. This is nice because you can have a .sql dump file per table.

I simply run docker-compose up and I'm good to go. Data automatically persists between stops. If you want remove the data and "suck in" new .sql files run docker-compose down then docker-compose up.

If anyone knows how to get the mysql docker to re-process files in /docker-entrypoint-initdb.d without removing the volume, please leave a comment and I will update this answer.

I had a similar error but with different context when I uploaded a *.p file to Google Drive. I tried to use it later in a Google Colab session, and got this error:

    1 with open("/tmp/train.p", mode='rb') as training_data:
----> 2     train = pickle.load(training_data)
UnpicklingError: invalid load key, '<'.

I solved it by compressing the file, upload it and then unzip on the session. It looks like the pickle file is not saved correctly when you upload/download it so it gets corrupted.

A list is unhashable because its contents can change over its lifetime. You can update an item contained in the list at any time.

A list doesn't use a hash for indexing, so it isn't restricted to hashable items.

echo array_search("car",array_keys($a));

DateTime values should be inserted as if they are strings surrounded by single quotes:

'20100301'

SQL Server allows for many accepted date formats and it should be the case that most development libraries provide a series of classes or functions to insert datetime values properly. However, if you are doing it manually, it is important to distinguish the date format using DateFormat and to use generalized format:

Set DateFormat MDY --indicates the general format is Month Day Year

Insert Table( DateTImeCol )
Values( '2011-03-12' )

By setting the dateformat, SQL Server now assumes that my format is YYYY-MM-DD instead of YYYY-DD-MM.

SET DATEFORMAT

SQL Server also recognizes a generic format that is always interpreted the same way: YYYYMMDD e.g. 20110312.

If you are asking how to insert the current date and time using T-SQL, then I would recommend using the keyword CURRENT_TIMESTAMP. For example:

Insert Table( DateTimeCol )
Values( CURRENT_TIMESTAMP )

The componentDidUpdate signature is void::componentDidUpdate(previousProps, previousState). With this you will be able to test which props/state are dirty and call setState accordingly.

Example:

componentDidUpdate(previousProps, previousState) {
    if (previousProps.data !== this.props.data) {
        this.setState({/*....*/})
    }
}

String name = android.os.Build.USER;

if (!TextUtils.isEmpty(name)) {
    nameEdit.setText(name);
}

If you convert it to a string it will not display any trailing zeros, which aren't stored in the variable in the first place since it was created as a Number, not a String.

var n = 1.245000
var noZeroes = n.toString() // "1.245" 

atoi can do that for you

Example:

char string[] = "1234";
int sum = atoi( string );
printf("Sum = %d\n", sum ); // Outputs: Sum = 1234

 string c = Char.ConvertFromUtf32(65);

c will contain "A"

Here's a function that will dynamically create a CSS rule in all major browsers. createCssRule takes a selector (e.g. "p.purpleText"), a rule (e.g. "color: purple;") and optionally a Document (the current document is used by default):

var addRule;

if (typeof document.styleSheets != "undefined" && document.styleSheets) {
    addRule = function(selector, rule) {
        var styleSheets = document.styleSheets, styleSheet;
        if (styleSheets && styleSheets.length) {
            styleSheet = styleSheets[styleSheets.length - 1];
            if (styleSheet.addRule) {
                styleSheet.addRule(selector, rule)
            } else if (typeof styleSheet.cssText == "string") {
                styleSheet.cssText = selector + " {" + rule + "}";
            } else if (styleSheet.insertRule && styleSheet.cssRules) {
                styleSheet.insertRule(selector + " {" + rule + "}", styleSheet.cssRules.length);
            }
        }
    }
} else {
    addRule = function(selector, rule, el, doc) {
        el.appendChild(doc.createTextNode(selector + " {" + rule + "}"));
    };
}

function createCssRule(selector, rule, doc) {
    doc = doc || document;
    var head = doc.getElementsByTagName("head")[0];
    if (head && addRule) {
        var styleEl = doc.createElement("style");
        styleEl.type = "text/css";
        styleEl.media = "screen";
        head.appendChild(styleEl);
        addRule(selector, rule, styleEl, doc);
        styleEl = null;
    }
};

createCssRule("body", "background-color: purple;");

Here is a simple way to convert Calendar values into Date instances.

Calendar C = new GregorianCalendar(1993,9,21);

Date DD = C.getTime();

System.out.println(DD);

The communication link between the driver and the data source to which the driver was attempting to connect failed before the function completed processing. So usually its a network error. This could be caused by packet drops or badly configured Firewall/Switch.

All the above answers are valid, however, there are some cases that the String Literal Type is part of another complex type. Consider the following example:

  // in foo.ts
  export type ToolbarTheme = {
    size: 'large' | 'small',
  };

  // in bar.ts
  import { ToolbarTheme } from './foo.ts';
  function useToolbarTheme(theme: ToolbarTheme) {/* ... */}

  // Here you will get the following error: 
  // Type 'string' is not assignable to type '"small" | "large"'.ts(2322)
  ['large', 'small'].forEach(size => (
    useToolbarTheme({ size })
  ));

You have multiple solutions to fix this. Each solution is valid and has its own use cases.

1) The first solution is to define a type for the size and export it from the foo.ts. This is good if when you need to work with the size parameter by its own. For example, you have a function that accepts or returns a parameter of type size and you want to type it.

  // in foo.ts
  export type ToolbarThemeSize = 'large' | 'small';
  export type ToolbarTheme = {
    size: ToolbarThemeSize
  };

  // in bar.ts
  import { ToolbarTheme, ToolbarThemeSize } from './foo.ts';
  function useToolbarTheme(theme: ToolbarTheme) {/* ... */}
  function getToolbarSize(): ToolbarThemeSize  {/* ... */}

  ['large', 'small'].forEach(size => (
    useToolbarTheme({ size: size as ToolbarThemeSize })
  ));

2) The second option is to just cast it to the type ToolbarTheme. In this case, you don't need to expose the internal of ToolbarTheme if you don't need.

  // in foo.ts
  export type ToolbarTheme = {
    size: 'large' | 'small'
  };

  // in bar.ts
  import { ToolbarTheme } from './foo.ts';
  function useToolbarTheme(theme: ToolbarTheme) {/* ... */}

  ['large', 'small'].forEach(size => (
    useToolbarTheme({ size } as ToolbarTheme)
  ));

Adding on to what Hubro said, apparently get_highest_row() has been deprecated. Using the max_row and max_column properties returns the row and column count. For example:

    wb = load_workbook(path, use_iterators=True)
    sheet = wb.worksheets[0]

    row_count = sheet.max_row
    column_count = sheet.max_column

To me the best way is -

1. Create an new issue with that repository on github and then upload the file in gif format.To convert video files into gif format you can use this website http://www.online-convert.com/
2. Submit the newly created issue.
3. Copy the address of the uploaded file
4. Finally in your README file put 

Hope this will help .

you can always use iteration param:

ITER=0
for I in ${FOO[@]}
do  
    echo ${I} ${ITER}
    ITER=$(expr $ITER + 1)
done

All what you have to do is to select and download the bootstrap.css and bootstrap.js files from Bootswatch website, and then replace the original files with them.

Of course you have to add the paths to your layout page after the jQuery path that is all.

A function which works in both bash and zsh:

# Return the first pathname in $PATH for name in $1
function cmd_path () {
  if [[ $ZSH_VERSION ]]; then
    whence -cp "$1" 2> /dev/null
  else  # bash
     type -P "$1"  # No output if not in $PATH
  fi
}

Non-zero is returned if the command is not found in $PATH.

A really easy way to understand this is to place the word "loop" after each of the keywords. The terms now make sense if they are just read like everyday phrases.

break loop - looping is broken and stops.

continue loop - loop continues to execute with the next iteration.

One more solution:

    <a data-toggle="modal" data-target="#exampleModalCenter">
      <span
        class="tags"
        data-toggle="tooltip"
        data-placement="right"
        title="Tooltip text"
      >
        Text
     </span>
   </a>

android.os.Process.killProcess(android.os.Process.myPid());

go to project path set FLASK_APP=ABC.py SET FLASK_ENV=development

flask run -h [yourIP] -p 8080 you will following o/p on CMD:- * Serving Flask app "expirement.py" (lazy loading) * Environment: development * Debug mode: on * Restarting with stat * Debugger is active! * Debugger PIN: 199-519-700 * Running on http://[yourIP]:8080/ (Press CTRL+C to quit)

The answer from Tanoh could use some clarification. VersionCode is the equivalent of a build number. So typically an app will go through many iterations before release. Some of these iterations may make it to the Google Play store in the form of alpha, beta, and actual releases. Each successive iteration must have an incremented versionCode. However, typically you only increase the versionName when between public releases. Both numbers are significant. Your users need to know if the version they have on their phone is the latest or not (versionName) and the Play Store and CI systems such as bitrise rely on and/or update the build number (versionCode)

For Bootstrap v4 check this:

https://v4-alpha.getbootstrap.com/components/pagination/#alignment

only add class to ul.pagination:

<nav">
  <ul class="pagination justify-content-center">
    <li class="page-item disabled">
      <a class="page-link" href="#" tabindex="-1">Previous</a>
    </li>
    <li class="page-item"><a class="page-link" href="#">1</a></li>
    <li class="page-item"><a class="page-link" href="#">2</a></li>
    <li class="page-item"><a class="page-link" href="#">3</a></li>
    <li class="page-item">
      <a class="page-link" href="#">Next</a>
    </li>
  </ul>
</nav>

function validateURL(textval) {
    var urlregex = /^(https?|ftp):\/\/([a-zA-Z0-9.-]+(:[a-zA-Z0-9.&%$-]+)*@)*((25[0-5]|2[0-4][0-9]|1[0-9]{2}|[1-9][0-9]?)(\.(25[0-5]|2[0-4][0-9]|1[0-9]{2}|[1-9]?[0-9])){3}|([a-zA-Z0-9-]+\.)*[a-zA-Z0-9-]+\.(com|edu|gov|int|mil|net|org|biz|arpa|info|name|pro|aero|coop|museum|[a-zA-Z]{2}))(:[0-9]+)*(\/($|[a-zA-Z0-9.,?'\\+&%$#=~_-]+))*$/;
    return urlregex.test(textval);
}

This can return true for URLs like:

http://stackoverflow.com/questions/1303872/url-validation-using-javascript

or:

http://regexlib.com/DisplayPatterns.aspx?cattabindex=1&categoryId=2

One more way of running an R script from the command line would be:

R < scriptName.R --no-save  

or with --save.

See also What's the best way to use R scripts on the command line (terminal)?.

On laravel 8.* I following steps work for me :

1. Run command composer remove package-name on terminal

2. Remove Provider and aliases from Config/app.php

3. Remove related file from Config folder.

Remove from your code where you used .

STEP 1: cd /opt/google/chrome

STEP 2: edit google-chrome file. gedit google-chrome

STEP 3: find this line: exec -a "$0" "$HERE/chrome" "$@".

Mostly this line is in the end of google-chrome file.

Comment it out like this : #exec -a "$0" "$HERE/chrome" "$@"

STEP 4:add a new line at the same place.

exec -a "$0" "$HERE/chrome" "$@" --user-data-dir

STEP 5: save google-chrome file and quit. And then you can use chrome as root user. Enjoy it!

If you want to retain the last one of the duplicates you could use

 tac a.csv | sort -u -t, -r -k1,1 |tac

Which was my requirement

here

tac will reverse the file line by line

In supplement to @Dennis Williamson 's response above, if you want the same regex to be case-insensitive to the file extensions, use -iregex :

find /path/to -iregex ".*\.\(jpg\|gif\|png\|jpeg\)" > log

This q/a shows how to use find with regular expression: How to use regex with find command?

Pattern could be something like

'^Robert\\.\\(h|cgg\\)$'

This is another simple solution to generate random number of N digits:

$number_of_digits = 10;
echo substr(number_format(time() * mt_rand(),0,'',''),0,$number_of_digits);

Check it here: http://codepad.org/pyVvNiof

To support delta

const range = (start, end, delta) => {
  return Array.from(
    {length: (end - start) / delta}, (v, k) => (k * delta) + start
  )
};

You can create CSV file using encoding UTF8 + BOM (https://en.wikipedia.org/wiki/Byte_order_mark).

First three bytes are BOM (0xEF,0xBB,0xBF) and then UTF8 content.

Use ng-pattern, in this example you can validate a simple patern with 10 numbers, when the patern is not matched ,the message is show and the button is disabled.

 <form  name="phoneNumber">

        <label for="numCell" class="text-strong">Phone number</label>

        <input id="numCell" type="text" name="inputCelular"  ng-model="phoneNumber" 
            class="form-control" required  ng-pattern="/^[0-9]{10,10}$/"></input>
        <div class="alert-warning" ng-show="phoneNumber.inputCelular.$error.pattern">
            <p> write a phone number</p>
        </div>

    <button id="button"  class="btn btn-success" click-once ng-disabled="!phoneNumber.$valid" ng-click="callDigitaliza()">Buscar</button>

Also you can use another complex patern like

^+?\d{1,3}?[- .]?(?(?:\d{2,3}))?[- .]?\d\d\d[- .]?\d\d\d\d$

, for more complex phone numbers

Best way to make drop down list:

grid.Column("PriceType",canSort:true,header: "PriceType",format: @<span>
    <span id="[email protected]">@item.PriceTypeDescription</span>
    @Html.DropDownList("PriceType"+(int)item.ShoppingCartID,new SelectList(MvcApplication1.Services.ExigoApiContext.CreateODataContext().PriceTypes.Select(s => new { s.PriceTypeID, s.PriceTypeDescription }).AsEnumerable(),"PriceTypeID", "PriceTypeDescription",Convert.ToInt32(item.PriceTypeId)), new { @class = "PriceType",@style="width:120px;display:none",@selectedvalue="selected"})
        </span>),

Since .NET 4.7.1, you can use the side-effect free Prepend() and Append(). The output is going to be an IEnumerable.

// Creating an array of numbers
var ti = new List<int> { 1, 2, 3 };

// Prepend and Append any value of the same type
var results = ti.Prepend(0).Append(4);

// output is 0, 1, 2, 3, 4
Console.WriteLine(string.Join(", ", results ));

• Remove the file from the index, but keep it versioned and left with uncommitted changes in working copy:

  git reset head <file>
  

• Reset the file to the last state from HEAD, undoing changes and removing them from the index:

  git reset HEAD <file>
  git checkout <file>
  
  # If you have a `<branch>` named like `<file>`, use:
  git checkout -- <file>
  

  This is needed since git reset --hard HEAD won't work with single files.

• Remove <file> from index and versioning, keeping the un-versioned file with changes in working copy:

  git rm --cached <file>
  

• Remove <file> from working copy and versioning completely:

  git rm <file>
  

Javascript always passes by value. However, if you pass an object to a function, the "value" is really a reference to that object, so the function can modify that object's properties but not cause the variable outside the function to point to some other object.

An example:

function changeParam(x, y, z) {
  x = 3;
  y = "new string";
  z["key2"] = "new";
  z["key3"] = "newer";

  z = {"new" : "object"};
}

var a = 1,
    b = "something",
    c = {"key1" : "whatever", "key2" : "original value"};

changeParam(a, b, c);

// at this point a is still 1
// b is still "something"
// c still points to the same object but its properties have been updated
// so it is now {"key1" : "whatever", "key2" : "new", "key3" : "newer"}
// c definitely doesn't point to the new object created as the last line
// of the function with z = ...

Parsing string with moment.js.

const date = '1231231231231' //Example String date
const parsed = moment(+date);

I would personally recommend this tool. It is an XML to JSON converter.

It is very lightweight and is in pure JavaScript. It needs no dependencies. You can simply add the functions to your code and use it as you wish.

It also takes the XML attributes into considerations.

var xml = ‘<person id=”1234” age=”30”><name>John Doe</name></person>’;
var json = xml2json(xml); 

console.log(json); 
// prints ‘{“person”: {“id”: “1234”, “age”: “30”, “name”: “John Doe”}}’

Here's an online demo!

You don't want to take care of normalizing your data in a view - what if the user changes the data that gets submitted? Instead you could take care of it in the model using the before_save (or the before_validation) callback. Here's an example of the relevant code for a model like yours:

class Place < ActiveRecord::Base   before_save do |place|     place.city = place.city.downcase.titleize     place.country = place.country.downcase.titleize   end end 

You can also check out the Ruby on Rails guide for more info.

To answer you question more directly, something like this would work:

<%= f.text_field :city, :value => (f.object.city ? f.object.city.titlecase : '') %>   

This just means if f.object.city exists, display the titlecase version of it, and if it doesn't display a blank string.

in cmd set Visual Studio path depending upon ur version as

Visual Studio 2010 (VS10): SET VS90COMNTOOLS=%VS100COMNTOOLS%

Visual Studio 2012 (VS11): SET VS90COMNTOOLS=%VS110COMNTOOLS%

Visual Studio 2013 (VS12): SET VS90COMNTOOLS=%VS120COMNTOOLS%

In node-master( original node module downloaded from git ) run vcbuild.bat with admin privileges. vcbild.bat will generate windows related dependencies and will add folder name Release in node-master

Once it run it will take time to build the files.

Then in the directory having .gyp file use command

node-gyp rebuild --msvs_version=2012 --nodedir="Dive Name:\path to node-master\node-master"

this will build all the dependencies.

I had node version 6.4.0 .

As i am need of the older version 6.3.0 , i just installed the 6.3.0 version again in my system. node version downgraded automatically.

So, to downgrade the node version , Just install the older version of node js . It will get downgraded automatically from the higher version.

I tried in osx . It works like a charm .

I would recommend to use the unary plus operator, to force an eventual string to be treated as number, inside parenthesis to make the code more readable like the following:

(+varname)

So, in your case it's:

var num1 = '20',
    num2 = '30.5';

var sum = (+num1) + (+num2);

// Just to test it
console.log( sum ); // 50.5

You can apply a theme to any activity by including android:theme inside <activity> inside manifest file.

For example:

1. <activity android:theme="@android:style/Theme.Dialog">
2. <activity android:theme="@style/CustomTheme">

And if you want to set theme programatically then use setTheme() before calling setContentView() and super.onCreate() method inside onCreate() method.

If you use:

import Math

then that will allow you to use Math's functions, but you must do Math.Calculate, so that is obviously what you don't want.

If you want to import a module's functions without having to prefix them, you must explicitly name them, like:

from Math import Calculate, Add, Subtract

Now, you can reference Calculate, Add, and Subtract just by their names. If you wanted to import ALL functions from Math, do:

from Math import *

However, you should be very careful when doing this with modules whose contents you are unsure of. If you import two modules who contain definitions for the same function name, one function will overwrite the other, with you none the wiser.

Apply the following CSS:

html {
    height: 100%;
}
body {
    height: 100%;
    margin: 0;
    background-repeat: no-repeat;
    background-attachment: fixed;
}

Edit: Added margin: 0; to body declaration per comments (Martin).

Edit: Added background-attachment: fixed; to body declaration per comments (Johe Green).

Target parameters:

float width = 1024;
float height = 768;
var brush = new SolidBrush(Color.Black);

Your original file:

var image = new Bitmap(file);

Target sizing (scale factor):

float scale = Math.Min(width / image.Width, height / image.Height);

The resize including brushing canvas first:

var bmp = new Bitmap((int)width, (int)height);
var graph = Graphics.FromImage(bmp);

// uncomment for higher quality output
//graph.InterpolationMode = InterpolationMode.High;
//graph.CompositingQuality = CompositingQuality.HighQuality;
//graph.SmoothingMode = SmoothingMode.AntiAlias;

var scaleWidth = (int)(image.Width * scale);
var scaleHeight = (int)(image.Height * scale);

graph.FillRectangle(brush, new RectangleF(0, 0, width, height));
graph.DrawImage(image, ((int)width - scaleWidth)/2, ((int)height - scaleHeight)/2, scaleWidth, scaleHeight);

And don't forget to do a bmp.Save(filename) to save the resulting file.

Working example of a download button, to save a cat photo from an url as "cat.jpg":

HTML:

<button onclick="downloadUrl('https://i.imgur.com/AD3MbBi.jpg', 'cat.jpg')">Download</button>

JavaScript:

function downloadUrl(url, filename) {
  let xhr = new XMLHttpRequest();
  xhr.open("GET", url, true);
  xhr.responseType = "blob";
  xhr.onload = function(e) {
    if (this.status == 200) {
      const blob = this.response;
      const a = document.createElement("a");
      document.body.appendChild(a);
      const blobUrl = window.URL.createObjectURL(blob);
      a.href = blobUrl;
      a.download = filename;
      a.click();
      setTimeout(() => {
        window.URL.revokeObjectURL(blobUrl);
        document.body.removeChild(a);
      }, 0);
    }
  };
  xhr.send();
}

You can use a javascript image processing framework for client-side image processing before uploading the image to the server.

Below I used MarvinJ to create a runnable code based on the example in the following page: "Processing images in client-side before uploading it to a server"

Basically I use the method Marvin.scale(...) to resize the image. Then, I upload the image as a blob (using the method image.toBlob()). The server answers back providing a URL of the received image.

/***********************************************_x000D_
 * GLOBAL VARS_x000D_
 **********************************************/_x000D_
var image = new MarvinImage();_x000D_
_x000D_
/***********************************************_x000D_
 * FILE CHOOSER AND UPLOAD_x000D_
 **********************************************/_x000D_
 $('#fileUpload').change(function (event) {_x000D_
 form = new FormData();_x000D_
 form.append('name', event.target.files[0].name);_x000D_
 _x000D_
 reader = new FileReader();_x000D_
 reader.readAsDataURL(event.target.files[0]);_x000D_
 _x000D_
 reader.onload = function(){_x000D_
  image.load(reader.result, imageLoaded);_x000D_
 };_x000D_
 _x000D_
});_x000D_
_x000D_
function resizeAndSendToServer(){_x000D_
  $("#divServerResponse").html("uploading...");_x000D_
 $.ajax({_x000D_
  method: 'POST',_x000D_
  url: 'https://www.marvinj.org/backoffice/imageUpload.php',_x000D_
  data: form,_x000D_
  enctype: 'multipart/form-data',_x000D_
  contentType: false,_x000D_
  processData: false,_x000D_
  _x000D_
    _x000D_
  success: function (resp) {_x000D_
       $("#divServerResponse").html("SERVER RESPONSE (NEW IMAGE):<br/><img src='"+resp+"' style='max-width:400px'></img>");_x000D_
  },_x000D_
  error: function (data) {_x000D_
   console.log("error:"+error);_x000D_
   console.log(data);_x000D_
  },_x000D_
  _x000D_
 });_x000D_
};_x000D_
_x000D_
/***********************************************_x000D_
 * IMAGE MANIPULATION_x000D_
 **********************************************/_x000D_
function imageLoaded(){_x000D_
  Marvin.scale(image.clone(), image, 120);_x000D_
  form.append("blob", image.toBlob());_x000D_
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>_x000D_
<script src="https://www.marvinj.org/releases/marvinj-0.8.js"></script>_x000D_
<form id="form" action='/backoffice/imageUpload.php' style='margin:auto;' method='post' enctype='multipart/form-data'>_x000D_
    <input type='file' id='fileUpload' class='upload' name='userfile'/>_x000D_
</form><br/>_x000D_
<button type="button" onclick="resizeAndSendToServer()">Resize and Send to Server</button><br/><br/>_x000D_
<div id="divServerResponse">_x000D_
</div>

I would suggest using the Windows Communication Foundation:

http://en.wikipedia.org/wiki/Windows_Communication_Foundation

You can pass objects back and forth, use a variety of different protocols. I would suggest using the binary tcp protocol.

You must use a tool called a "header". In a header you declare the function that you want to use. Then you include it in both files. A header is a separate file included using the #include directive. Then you may call the other function.

other.h

void MyFunc();

main.cpp

#include "other.h"
int main() {
    MyFunc();
}

other.cpp

#include "other.h"
#include <iostream>
void MyFunc() {
    std::cout << "Ohai from another .cpp file!";
    std::cin.get();
}

We can bypass execution policy in a nice way (inside command prompt):

type file.ps1 | powershell -command -

Or inside powershell:

gc file.ps1|powershell -c -

The Web Storage API provides mechanisms by which browsers can securely store key/value pairs, in a much more intuitive fashion than using cookies. The Web Storage API extends the Window object with two new properties — Window.sessionStorage and Window.localStorage. — invoking one of these will create an instance of the Storage object, through which data items can be set, retrieved, and removed. A different Storage object is used for the sessionStorage and localStorage for each origin (domain).

Storage objects are simple key-value stores, similar to objects, but they stay intact through page loads.

localStorage.colorSetting = '#a4509b';
localStorage['colorSetting'] = '#a4509b';
localStorage.setItem('colorSetting', '#a4509b');

The keys and the values are always strings. To store any type convert it to String and then store it. It's always recommended to use Storage interface methods.

var testObject = { 'one': 1, 'two': 2, 'three': 3 };
// Put the object into storage
localStorage.setItem('testObject', JSON.stringify(testObject));
// Retrieve the object from storage
var retrievedObject = localStorage.getItem('testObject');
console.log('Converting String to Object: ', JSON.parse(retrievedObject));

The two mechanisms within Web Storage are as follows:

• sessionStorage maintains a separate storage area for each given origin^{Same-origin policy} that's available for the duration of the page session (as long as the browser is open, including page reloads and restores).
• localStorage does the same thing, but persists even when the browser is closed and reopened.

Storage « Local storage writes the data to the disk, while session storage writes the data to the memory only. Any data written to the session storage is purged when your app exits.

The maximum storage available is different per browser, but most browsers have implemented at least the w3c recommended maximum storage limit of 5MB.

+----------------+--------+---------+-----------+--------+
|                | Chrome | Firefox | Safari    |  IE    |
+----------------+--------+---------+-----------+--------+
| LocalStorage   | 10MB   | 10MB    | 5MB       | 10MB   |
+----------------+--------+---------+-----------+--------+
| SessionStorage | 10MB   | 10MB    | Unlimited | 10MB   |
+----------------+--------+---------+-----------+--------+

Always catch LocalStorage security and quota exceeded errors

• QuotaExceededError: When storage limits exceeds on this function window.sessionStorage.setItem(key, value);, it throws a "QuotaExceededError" DOMException exception if the new value couldn't be set. (Setting could fail if, e.g., the user has disabled storage for the site, or if the quota has been exceeded.)

  DOMException.QUOTA_EXCEEDED_ERR is 22, example fiddle.

• SecurityError : Uncaught SecurityError: Access to 'localStorage' is denied for this document.

   CHROME:-Privacy and security « Content settings « Cookies « Block third-party cookies.
  

StorageEvent « The storage event is fired on a document's Window object when a storage area changes. When a user agent is to send a storage notification for a Document, the user agent must queue a task to fire an event named storage at the Document object's Window object, using StorageEvent.

Note: For a real world example, see Web Storage Demo. ^{check out the source code}

Listen to the storage event on dom/Window to catch changes in the storage. fiddle.

Cookies (web cookie, browser cookie) Cookies are data, stored in small text files as name-value pairs, on your computer.

JavaScript access using Document.cookie

New cookies can also be created via JavaScript using the Document.cookie property, and if the HttpOnly flag is not set, existing cookies can be accessed from JavaScript as well.

document.cookie = "yummy_cookie=choco"; 
document.cookie = "tasty_cookie=strawberry"; 
console.log(document.cookie); 
// logs "yummy_cookie=choco; tasty_cookie=strawberry"

Secure and HttpOnly cookies ^{HTTP State Management Mechanism}

Cookies are often used in web application to identify a user and their authenticated session

When receiving an HTTP request, a server can send a Set-Cookie header with the response. The cookie is usually stored by the browser, and then the cookie is sent with requests made to the same server inside a Cookie HTTP header.

Set-Cookie: <cookie-name>=<cookie-value> 
Set-Cookie: <cookie-name>=<cookie-value>; Expires=<date>

Session cookies will get removed when the client is shut down. They don't specify the Expires or Max-Age directives.

Set-Cookie: sessionid=38afes7a8; HttpOnly; Path=/

Permanent cookies expire at a specific date (Expires) or after a specific length of time (Max-Age).

Set-Cookie: id=a3fWa; Expires=Wed, 21 Oct 2015 07:28:00 GMT; Secure; HttpOnly

The Cookie HTTP request header contains stored HTTP cookies previously sent by the server with the Set-Cookie header. HTTP-only cookies aren't accessible via JavaScript through the Document.cookie property, the XMLHttpRequest and Request APIs to mitigate attacks against cross-site scripting (XSS).

Cookies are mainly used for three purposes:

• Session management « Logins, shopping carts, game scores, or anything else the server should remember
• Personalization « User preferences, themes, and other settings
• Tracking (Recording and analyzing user behavior) « Cookies have a domain associated to them. If this domain is the same as the domain of the page you are on, the cookies is said to be a first-party cookie. If the domain is different, it is said to be a third-party cookie. While first-party cookies are sent only to the server setting them, a web page may contain images or other components stored on servers in other domains (like ad banners). Cookies that are sent through these third-party components are called third-party cookies and are mainly used for advertising and tracking across the web.

Cookies were invented to solve the problem "how to remember information about the user":

• When a user visits a web page, his name can be stored in a cookie.
• Next time the user visits the page, cookies belonging to the page is added to the request. This way the server gets the necessary data to "remember" information about users.

GitHubGist Example

As summary,

• localStorage persists over different tabs or windows, and even if we close the browser, accordingly with the domain security policy and user choices about quota limit.
• sessionStorage object does not persist if we close the tab (top-level browsing context) as it does not exists if we surf via another tab or window.
• Web Storage (session, local) allows us to save a large amount of key/value pairs and lots of text, something impossible to do via cookie.
• Cookies that are used for sensitive actions should have a short lifetime only.
• Cookies mainly used for advertising and tracking across the web. See for example the types of cookies used by Google.
• Cookies are sent with every request, so they can worsen performance (especially for mobile data connections). Modern APIs for client storage are the Web storage API (localStorage and sessionStorage) and IndexedDB.

Once you get the macports version of gdb installed you will need to disable SIP in order to make the proper edits to /System/Library/LaunchDaemons/com.apple.taskgated.plist. To disable SIP, you need to restart in recovery mode and execute the following command:

csrutil disable

Then restart. Then you will need to edit the bottom part of com.apple.taskgated.plist like this:

<array>
        <string>/usr/libexec/taskgated</string>
        <string>-sp</string>
</array>

Then you will have to restart to have the changes take effect. Then you should reenable SIP. The gdb command for the macports install is actually ggdb. You will need to code sign ggdb following the instructions here:

https://gcc.gnu.org/onlinedocs/gcc-4.8.1/gnat_ugn_unw/Codesigning-the-Debugger.html

The only way I have been able to get the code signing to work is by running ggdb with sudo. Good luck!

I had the same problem, and neither umount /path -f, neither umount.nfs /path -f, neither fuser -km /path, works

finally I found a simple solution >.<

sudo /etc/init.d/nfs-common restart, then lets do the simple umount ;-)

Properly parenthesized for clarity, it is

hsb.s = (max != 0) ? (255 * delta / max) : 0;

meaning return either

• 255*delta/max if max != 0
• 0 if max == 0

you can use this script

# git mv a folder and sub folders in windows 

function Move-GitFolder {
    param (
        $target,
        $destination
    )
    
    Get-ChildItem $target -recurse |
    Where-Object { ! $_.PSIsContainer } |
    ForEach-Object { 
        $fullTargetFolder = [System.IO.Path]::GetFullPath((Join-Path (Get-Location) $target))
        $fullDestinationFolder = [System.IO.Path]::GetFullPath((Join-Path (Get-Location) $destination))
        $fileDestination = $_.Directory.FullName.Replace($fullTargetFolder.TrimEnd('\'), $fullDestinationFolder.TrimEnd('\'))

        New-Item -ItemType Directory -Force -Path $fileDestination | Out-Null

        $filePath = Join-Path $fileDestination $_.Name

        git mv $_.FullName $filePath
        
    }
}

Usage

Move-GitFolder <Target folder> <Destination folder>

the advantage of this solution over other solutions is that it move folders and files recursively in a folder and even create the folder structure if it doesn't exist

Option 1 Each div is specifically identified, so any other div (without the specific IDs) on the page will not obey the :hover pseudo-class.

<style type="text/css">
  #div1, #div2, #div3{  
    display:none;  
  }  
  #div1:hover, #div2:hover, #div3:hover{  
    display:block;  
  }
</style>

Option 2 All divs on the page, regardless of IDs, have the hover effect.

<style type="text/css">
  div{  
    display:none;  
  }  
  div:hover{  
    display:block;  
  }
</style>

There is an extension called Hinterland for jupyter, which automatically displays the drop down menu when typing. There are also some other useful extensions.

In order to install extensions, you can follow the guide on this github repo. To easily activate extensions, you may want to use the extensions configurator.

One potential gotcha that has bitten me before:

I like to have at most one @Before method in each test class, because order of running the @Before methods defined within a class is not guaranteed. Typically, I will call such a method setUpTest().

But, although @Before is documented as The @Before methods of superclasses will be run before those of the current class. No other ordering is defined., this only applies if each method marked with @Before has a unique name in the class hierarchy.

For example, I had the following:

public class AbstractFooTest {
  @Before
  public void setUpTest() { 
     ... 
  }
}

public void FooTest extends AbstractFooTest {
  @Before
  public void setUpTest() { 
    ...
  }
}

I expected AbstractFooTest.setUpTest() to run before FooTest.setUpTest(), but only FooTest.setupTest() was executed. AbstractFooTest.setUpTest() was not called at all.

The code must be modified as follows to work:

public void FooTest extends AbstractFooTest {
  @Before
  public void setUpTest() {
    super.setUpTest();
    ...
  }
}

How to post file using an object in memory (like a JSON object):

import axios from 'axios';
import * as FormData  from 'form-data'

async function sendData(jsonData){
    // const payload = JSON.stringify({ hello: 'world'});
    const payload = JSON.stringify(jsonData);
    const bufferObject = Buffer.from(payload, 'utf-8');
    const file = new FormData();

    file.append('upload_file', bufferObject, "b.json");

    const response = await axios.post(
        lovelyURL,
        file,
        headers: file.getHeaders()
    ).toPromise();


    console.log(response?.data);
}

Adding a separate answer because it is radically different.

You could use rgba and set the alpha channel low (to get transparency) to make your drop shadow less noticeable.

Try something like this (play with the .5)

-webkit-box-shadow: 0px -4px 7px rbga(230, 230, 230, .5);
-moz-box-shadow: 0px -4px 7px rbga(230, 230, 230, .5);
box-shadow: 0px -4px 7px rbga(230, 230, 230, .5);

Hope this helps!

I am also a Windows user. And I have installed Python 3.7 and when I try to install any package it throws the same error that you are getting.

Try this out. This worked for me.

python -m pip install numpy

And whenever you install new package just write python -m pip install <package_name>

Hope this is helpful.

use a StreamReader, then you can use the ReadToEnd method that returns a string.

If in the folder with your project you created a file with the name "datetime.py"

i am using the following method to get the caller for a specific class from the stacktrace:

package test.log;

public class CallerClassTest {

    public static void main(final String[] args) {
        final Caller caller = new Caller(new Callee());
        caller.execute();
    }

    private static class Caller {

        private final Callee c;

        public Caller(final Callee c) {
            this.c = c;
        }

        void execute() {
            c.call();
        }
    }

    static class Callee {

        void call() {
            System.out.println(getCallerClassName(this.getClass()));
        }
    }

    /**
     * Searches the current threads stacktrace for the class that called the given class. Returns {@code null} if the
     * calling class could not be found.
     * 
     * @param clazz
     *            the class that has been called
     * 
     * @return the caller that called the class or {@code null}
     */
    public static String getCallerClassName(final Class<?> clazz) {
        final StackTraceElement[] stackTrace = Thread.currentThread().getStackTrace();
        final String className = clazz.getName();
        boolean classFound = false;
        for (int i = 1; i < stackTrace.length; i++) {
            final StackTraceElement element = stackTrace[i];
            final String callerClassName = element.getClassName();
            // check if class name is the requested class
            if (callerClassName.equals(className)) classFound = true;
            else if (classFound) return callerClassName;
        }
        return null;
    }

}

I found the answer:

$mail->AddEmbeddedImage('img/2u_cs_mini.jpg', 'logo_2u');

and on the <img> tag put src='cid:logo_2u'

the following is that the difference between iterator and listIterator

iterator :

boolean hasNext();
E next();
void remove();

listIterator:

boolean hasNext();
E next();
boolean hasPrevious();
E previous();
int nextIndex();
int previousIndex();
void remove();
void set(E e);
void add(E e);

The new :is() CSS pseudo-class can do it in one selector:

:is(h1, h2, h3, h4, h5, h6) {
  color: red;
}

Assuming Java (JDK + JRE) is installed in your system, do the following steps:

1. Install Tomcat7
2. Copy 'tools.jar' from 'C:\Program Files (x86)\Java\jdk1.6.0_27\lib' and paste it under 'C:\Program Files (x86)\Apache Software Foundation\Tomcat 7.0\lib'.
3. Setup paths in your Environment Variables as shown below:

C:>echo %path%

C:\Program Files (x86)\Java\jdk1.6.0_27\bin;%CATALINA_HOME%\bin;

C:>echo %classpath%

C:\Program Files (x86)\Java\jdk1.6.0_27\lib\tools.jar;
C:\Program Files (x86)\Apache Software Foundation\Tomcat 7.0\lib\servlet-api.jar;

C:>echo %CATALINA_HOME%

C:\Program Files (x86)\Apache Software Foundation\Tomcat 7.0;

C:>echo %JAVA_HOME%

C:\Program Files (x86)\Java\jdk1.6.0_27;

Now you can test whether Tomcat is setup correctly, by typing the following commands in your command prompt:

C:/>javap javax.servlet.ServletException
C:/>javap javax.servlet.http.HttpServletRequest

It should show a bunch of classes

Now start Tomcat service by double clicking on 'Tomcat7.exe' under 'C:\Program Files (x86)\Apache Software Foundation\Tomcat 7.0\bin'.

I would use a two file setup like this:

index.php

<?php 
session_start(); 

define('DS',  TRUE); // used to protect includes
define('USERNAME', $_SESSION['username']);
define('SELF',  $_SERVER['PHP_SELF'] );

if (!USERNAME or isset($_GET['logout']))
 include('login.php');

// everything below will show after correct login 
?>

login.php

<?php defined('DS') OR die('No direct access allowed.');

$users = array(
 "user" => "userpass"
);

if(isset($_GET['logout'])) {
    $_SESSION['username'] = '';
    header('Location:  ' . $_SERVER['PHP_SELF']);
}

if(isset($_POST['username'])) {
    if($users[$_POST['username']] !== NULL && $users[$_POST['username']] == $_POST['password']) {
  $_SESSION['username'] = $_POST['username'];
  header('Location:  ' . $_SERVER['PHP_SELF']);
    }else {
        //invalid login
  echo "<p>error logging in</p>";
    }
}

echo '<form method="post" action="'.SELF.'">
  <h2>Login</h2>
  <p><label for="username">Username</label> <input type="text" id="username" name="username" value="" /></p>
  <p><label for="password">Password</label> <input type="password" id="password" name="password" value="" /></p>
  <p><input type="submit" name="submit" value="Login" class="button"/></p>
  </form>';
exit; 
?>

In my own experience where I needed to try and find out what some old VB6 programs were doing, I turned to Process Explorer (Sysinternals). I did the following:

1. Run Process Explorer
2. Run VB6 .exe
3. Locate exe in Process Explorer
4. Right click on process
5. Check the "Strings" tab

This didn't show the actual functions, but it listed their names, folders of where files were being copied from and to and if it accessed a DB it would also display the connection string. Enough to help you get an idea, but may be useless for complex programs. The programs I was looking at were pretty basic (no pun intended).

YMMV.

Try this (using default keyword)

 bool foo = default(bool); if (foo) { } 

This is the code that i personally use in my sites. Works outside of the box.

<?php
function breadcrumbs($home = 'Home') {
  global $page_title; //global varable that takes it's value from the page that breadcrubs will appear on. Can be deleted if you wish, but if you delete it, delete also the title tage inside the <li> tag inside the foreach loop.
    $breadcrumb  = '<div class="breadcrumb-container"><div class="container"><ol class="breadcrumb">';
    $root_domain = ($_SERVER['HTTPS'] ? 'https' : 'http') . '://' . $_SERVER['HTTP_HOST'].'/';
    $breadcrumbs = array_filter(explode('/', parse_url($_SERVER['REQUEST_URI'], PHP_URL_PATH)));
    $breadcrumb .= '<li><i class="fa fa-home"></i><a href="' . $root_domain . '" title="Home Page"><span>' . $home . '</span></a></li>';
    foreach ($breadcrumbs as $crumb) {
        $link = ucwords(str_replace(array(".php","-","_"), array(""," "," "), $crumb));
        $root_domain .=  $crumb . '/';
        $breadcrumb .= '<li><a href="'. $root_domain .'" title="'.$page_title.'"><span>' . $link . '</span></a></li>';
    }
    $breadcrumb .= '</ol>';
    $breadcrumb .= '</div>';
    $breadcrumb .= '</div>';
    return $breadcrumb;
}
echo breadcrumbs();
?>

The css:

.breadcrumb-container {
    width: 100%;
    background-color: #f8f8f8;
    border-bottom-color: 1px solid #f4f4f4;
    list-style: none;
    margin-top: 72px;
    min-height: 25px;
    box-shadow: 0 3px 0 rgba(60, 57, 57, .2)
}

.breadcrumb-container li {
    display: inline
}
.breadcrumb {
    font-size: 12px;
    padding-top: 3px
}
.breadcrumb>li:last-child:after {
    content: none
}

.breadcrumb>li:last-child {
    font-weight: 700;
    font-style: italic
}
.breadcrumb>li>i {
    margin-right: 3px
}

.breadcrumb>li:after {
    font-family: FontAwesome;
    content: "\f101";
    font-size: 11px;
    margin-left: 3px;
    margin-right: 3px
}
.breadcrumb>li+li:before {
    font-size: 11px;
    padding-left: 3px
}

Feel free to play around with the css padding and margins until you get it right for your own site.

This should work

DECLARE @singleQuote CHAR 
SET @singleQuote =  CHAR(39)

insert into my_table values('hi, my name'+ @singleQuote +'s tim.')

Just to add to answers above, you can streamline the use of express-fileupload to just a single route that needs it, instead of adding it to the every route.

let fileupload = require("express-fileupload");

...

app.post("/upload", fileupload, function(req, res){

...

});

I found the answer :)

Use JsonPath or XmlPath (in case you have XML) to get data from the response body.

In my case:

JsonPath jsonPath = new JsonPath(responseBody);
int user_id = jsonPath.getInt("user_id");

One possibility would be to add fixed width rows and columns to act as the padding / margin you are looking for.

You might also consider that you are constrained by the size of your container, and that a grid will become as large as the containing element or its specified width and height. You could simply use columns and rows with no width or height set. That way they default to evenly breaking up the total space within the grid. Then it would just be a mater of centering your elements vertically and horizontally within you grid.

Another method might be to wrap all grid elements in a fixed with single row & column grid that has a fixed size and margin. That your grid contains fixed width / height boxes which contain your actual elements.

I use Django 2.2.16. And this is how I solve this problem:

from typing import Any

from django.core.exceptions import ObjectDoesNotExist
from django.db import models
from django.db.models.base import ModelBase
from django.db.models.manager import Manager


class SManager(Manager):
    def get_if_exist(self, *args: Any, **kwargs: Any):
        try:
            return self.get(*args, **kwargs)
        except ObjectDoesNotExist:
            return None


class SModelBase(ModelBase):
    def _prepare(cls):
        manager = SManager()
        manager.auto_created = True
        cls.add_to_class("objects", manager)

        super()._prepare()

    class Meta:
        abstract = True


class SModel(models.Model, metaclass=SModelBase):
    managers = False

    class Meta:
        abstract = True

And after that, in every models, you just need to import in:

from custom.models import SModel


class SUser(SModel):
    pass

And in views, you can call like this:

SUser.objects.get_if_exist(id=1)

Late answer: In my case, it was my session files under

/var/lib/php/sessions

that were using Inodes.
I was even unable to open my crontab or making a new directory let alone triggering the deletion operation. Since I use PHP, we have this guide where I copied the code from example 1 and set up a cronjob to execute that part of the code.

<?php
// Note: This script should be executed by the same user of web server 
process.

// Need active session to initialize session data storage access.
session_start();

// Executes GC immediately
session_gc();

// Clean up session ID created by session_gc()
session_destroy();
?>

If you're wondering how did I manage to open my crontab, then well, I deleted some sessions manually through CLI.

Hope this helps!

Earlier...

var labels = document.getElementsByTagName("LABEL"),
    lookup = {},
    i, label;

for (i = 0; i < labels.length; i++) {
    label = labels[i];
    if (document.getElementById(label.htmlFor)) {
        lookup[label.htmlFor] = label;
    }
}

Later...

var myLabel = lookup[myInput.id];

Snarky comment: Yes, you can also do it with JQuery. :-)

protected can be used by any subclasses from any assembly.

protected internal is everything that protected is, plus also anything in the same assembly can access it.

Importantly, it doesn't mean "subclasses in the same assembly" - it is the union of the two, not the intersection.

What about a simple write.table()?

text = c("Hello", "World")
write.table(text, file = "output.txt", col.names = F, row.names = F, quote = F)

The parameters col.names = FALSE and row.names = FALSE make sure to exclude the row and column names in the txt, and the parameter quote = FALSE excludes those quotation marks at the beginning and end of each line in the txt. To read the data back in, you can use text = readLines("output.txt").

• Visit phpmyadmin
• Select your database and click on structure
• In front of your table, you can see Empty, click on it to clear all the entries from the selected table.

Or you can do the same using sql query:

Click on SQL present along side Structure

TRUNCATE tablename; //offers better performance, but used only when all entries need to be cleared
or
DELETE FROM tablename; //returns the number of rows deleted

Refer to DELETE and TRUNCATE for detailed documentaion

There is a tmux plugin for this.

Check out tmux-resurrect

Restore tmux environment after system restart.

Tmux is great, except when you have to restart the computer. You lose all the running programs, working directories, pane layouts etc. There are helpful management tools out there, but they require initial configuration and continuous updates as your workflow evolves or you start new projects.

tmux-resurrect saves all the little details from your tmux environment so it can be completely restored after a system restart (or when you feel like it). No configuration is required. You should feel like you never quit tmux.

Or tmux-continuum

Features:

• continuous saving of tmux environment
• automatic tmux start when computer/server is turned on
• automatic restore when tmux is started

You're currently writing the binary data in the string-object to your file. This binary data will probably only consist of a pointer to the actual data, and an integer representing the length of the string.

If you want to write to a text file, the best way to do this would probably be with an ofstream, an "out-file-stream". It behaves exactly like std::cout, but the output is written to a file.

The following example reads one string from stdin, and then writes this string to the file output.txt.

#include <fstream>
#include <string>
#include <iostream>

int main()
{
    std::string input;
    std::cin >> input;
    std::ofstream out("output.txt");
    out << input;
    out.close();
    return 0;
}

Note that out.close() isn't strictly neccessary here: the deconstructor of ofstream can handle this for us as soon as out goes out of scope.

For more information, see the C++-reference: http://cplusplus.com/reference/fstream/ofstream/ofstream/

Now if you need to write to a file in binary form, you should do this using the actual data in the string. The easiest way to acquire this data would be using string::c_str(). So you could use:

write.write( studentPassword.c_str(), sizeof(char)*studentPassword.size() );

While you can alias your tables within your query (i.e., "SELECT u.username FROM users u;"), you have to use the actual names of the columns you're referencing. AS only impacts how the fields are returned.

Declare PtrSafe Function URLDownloadToFile Lib "urlmon" Alias "URLDownloadToFileA" _
(ByVal pCaller As Long, ByVal szURL As String, ByVal szFileName As String, _
ByVal dwReserved As Long, ByVal lpfnCB As Long) As Long

Sub Example()
    DownloadFile$ = "someFile.ext" 'here the name with extension
    URL$ = "http://some.web.address/" & DownloadFile 'Here is the web address
    LocalFilename$ = "C:\Some\Path" & DownloadFile !OR! CurrentProject.Path & "\" & DownloadFile 'here the drive and download directory
    MsgBox "Download Status : " & URLDownloadToFile(0, URL, LocalFilename, 0, 0) = 0
End Sub

Source

I found the above when looking for downloading from FTP with username and address in URL. Users supply information and then make the calls.

This was helpful because our organization has Kaspersky AV which blocks active FTP.exe, but not web connections. We were unable to develop in house with ftp.exe and this was our solution. Hope this helps other looking for info!

i also had this problem and didnt wanted to use deprecated solution so i ended up with:

in parrent

 <dynamic-table
  ContainerCustomStyle='width: 400px;'
  >
 </dynamic-Table>

child component

@Input() ContainerCustomStyle: string;

in child in html div

 <div class="container mat-elevation-z8"
 [style]='GetStyle(ContainerCustomStyle)' >

and in code

constructor(private sanitizer: DomSanitizer) {  }

  GetStyle(c) {
    if (isNullOrUndefined(c)) { return null; }
    return  this.sanitizer.bypassSecurityTrustStyle(c);
  }

works like expected and should not be deprecated ;)

For script creation at Windows cmd or powershell prompt:

C:\ProgramData\Anaconda3\Scripts\activate.bat C:\ProgramData\Anaconda3
conda list
pip list

Try this:

<div>
 <p onclick="startAnimation()">Start</p><!--O botão para iniciar (start)-->
 <div id="animation">Hello!</div> <!--O elemento que você quer animar-->
</div>

<style>
@keyframes animationName {
from {margin-left:-30%;}
}
</style>

<script>
function startAnimation() {
    document.getElementById("animation").style.animation = "animationName 2s linear 1";
}
</script>

Maybe this?

int n;

.... some coding....

n = n<=0? n:0-n;

Use:

Random r = new Random();
 int x= r.Next(10);//Max range

#include <stdbool.h>

For someone like me here to copy and paste.

In case if the solutions provided by others didn't work. Then you should try checking the Database Engines of the Parent and Child Tables.In my case, I had the parent tables' engine set to "MyISAM", changing it to InnoDB fixed it.

Hope this helps others who are stuck like me.

Create table #yourcolumndetails(
DBaseName varchar(100), 
TableSchema varchar(50), 
TableName varchar(100),
ColumnName varchar(100), 
DataType varchar(100), 
CharMaxLength varchar(100))

EXEC sp_MSForEachDB @command1='USE [?];
    INSERT INTO #yourcolumndetails SELECT
    Table_Catalog
    ,Table_Schema
    ,Table_Name
    ,Column_Name
    ,Data_Type
    ,Character_Maximum_Length
    FROM INFORMATION_SCHEMA.COLUMNS
    WHERE COLUMN_NAME like ''origin'''

select * from #yourcolumndetails
Drop table #yourcolumndetails

The code is
document.title = 'test'

Those are varargs they are used to create a method that receive any number of arguments.

For instance PrintStream.printf method uses it, since you don't know how many would arguments you'll use.

They can only be used as final position of the arguments.

varargs was was added on Java 1.5

An alternate is to use a new helper function which will take values from List and update in the DataGridView as following:

    private void DisplayStringListInDataGrid(List<string> passedList, ref DataGridView gridToUpdate, string newColumnHeader)
    {
        DataTable gridData = new DataTable();
        gridData.Columns.Add(newColumnHeader);

        foreach (string listItem in passedList)
        {
            gridData.Rows.Add(listItem);
        }

        BindingSource gridDataBinder = new BindingSource();
        gridDataBinder.DataSource = gridData;
        dgDataBeingProcessed.DataSource = gridDataBinder;
    }

Then we can call this function the following way:

    DisplayStringListInDataGrid(<nameOfListWithStrings>, ref <nameOfDataGridViewToDisplay>, <nameToBeGivenForTheNewColumn>);

In fact, we can simply use the standard bootstrap text colors, instead of hacking the CSS formats.

Standard Color examples: text-primary, text-secondary, text-success, text-danger, text-warning, text-info

In the Navbar code sample bellow, the text Homepage would be in the orange color (text-warning).

<a class="navbar-brand text-warning" href="/" > Homepage </a>

In the Navbar menu item sample bellow, the text Menu Item would be in the blue color (text-primary).

<a class="dropdown-item text-primary" href="/my-link">Menu Item</a>

JavaScript does not have such declarations. It would be:

var cubes = ...

regardless

But you can do:

for(var i = 0; i < cubes.length; i++)
{
  for(var j = 0; j < cubes[i].length; j++)
  {

  }
}

Note that JavaScript allows jagged arrays, like:

[
  [1, 2, 3],
  [1, 2, 3, 4]
]

since arrays can contain any type of object, including an array of arbitrary length.

As noted by MDC:

"for..in should not be used to iterate over an Array where index order is important"

If you use your original syntax, there is no guarantee the elements will be visited in numeric order.

What you are trying to deserialize to a Dictionary is actually a Javascript object serialized to JSON. In Javascript, you can use this object as an associative array, but really it's an object, as far as the JSON standard is concerned.

So you would have no problem deserializing what you have with a standard JSON serializer (like the .net ones, DataContractJsonSerializer and JavascriptSerializer) to an object (with members called AppName, AnotherAppName, etc), but to actually interpret this as a dictionary you'll need a serializer that goes further than the Json spec, which doesn't have anything about Dictionaries as far as I know.

One such example is the one everybody uses: JSON .net

There is an other solution if you don't want to use an external lib, which is to convert your Javascript object to a list before serializing it to JSON.

var myList = [];
$.each(myObj, function(key, value) { myList.push({Key:key, Value:value}) });

now if you serialize myList to a JSON object, you should be capable of deserializing to a List<KeyValuePair<string, ValueDescription>> with any of the aforementioned serializers. That list would then be quite obvious to convert to a dictionary.

Note: ValueDescription being this class:

public class ValueDescription
{
    public string Description { get; set; }
    public string Value { get; set; }
}

When you cherry-pick, it creates a new commit with a new SHA. If you do:

git cherry-pick -x <sha>

then at least you'll get the commit message from the original commit appended to your new commit, along with the original SHA, which is very useful for tracking cherry-picks.

I found a solution that works, but it's ugly.

• Connect the Android device to your PC with a USB cable and open Chrome on your desktop.
• Right-click anywhere on a page and select "Inspect".

• Click the three-dot menu and select "Remote devices" under the "More tools" menu:

  

• In the panel that opens, select your device and then the "Inspect" button next to the name of the tab on your phone that needs to be refreshed:

  

• In the window that opens, click the "Network" tab and check the "Disable cache" checkbox:

  

• Reload the page on your phone or using the reload button in the DevTools window.

Note: if your phone doesn't appear in the device list:

• make sure the USB connection is using File Transfer mode and isn't simply charging
• try restarting ADB or run adb devices to see if the device is being detected

Based on icecrime's answer I wrote this function

std::vector<int> intToDigits(int num_)
{
    std::vector<int> ret;
    string iStr = to_string(num_);

    for (int i = iStr.size() - 1; i >= 0; --i)
    {
        int units = pow(10, i);
        int digit = num_ / units % 10;
        ret.push_back(digit);
    }   

    return ret;
}

I think pressing Q should work.

you can check installed c# compilers and the printed version of the .net:

@echo off

for /r "%SystemRoot%\Microsoft.NET\Framework\" %%# in ("*csc.exe") do (
    set "l="
    for /f "skip=1 tokens=2 delims=k" %%$ in ('"%%# #"') do (
        if not defined l (
            echo Installed: %%$
            set l=%%$
        )
    )
)

echo latest installed .NET %l%

the csc.exe does not have a -version switch but it prints the .net version in its logo. You can also try with msbuild.exe but .net framework 1.* does not have msbuild.

I had the same problem. Now its working fine after doing below changes.

https://www.google.com/settings/security/lesssecureapps

You should change the "Access for less secure apps" to Enabled (it was enabled, I changed to disabled and than back to enabled). After a while I could send email.

I got here with an MS Access problem.

Backticks are good for MySQL, but they create weird errors, like "Invalid Query Name: Query1" in MS Access, for MS Access only, use square brackets:

It should look like this

SELECT Customer.[Customer ID], Customer.[Full Name] ...

^(?!my)\w+$

should work.

It first ensures that it's not possible to match my at the start of the string, and then matches alphanumeric characters until the end of the string. Whitespace anywhere in the string will cause the regex to fail. Depending on your input you might want to either strip whitespace in the front and back of the string before passing it to the regex, or use add optional whitespace matchers to the regex like ^\s*(?!my)(\w+)\s*$. In this case, backreference 1 will contain the name of the variable.

And if you need to ensure that your variable name starts with a certain group of characters, say [A-Za-z_], use

^(?!my)[A-Za-z_]\w*$

Note the change from + to *.

1. It is better to write .bat file in such way that its running is not dependent on current working directory, i.e. I recommend to put this line at the beginning of .bat file:

   cd "%~dp0"
   

2. Enclose filepath of .bat file in double quotes, i.e.:

   os.system('"D:\\x\\so here can be spaces\\otr.bat" ["<arg0>" ["<arg1>" ...]]')
   

3. To save output of some batch command in another file you can use usual redirection syntax, for example:

   os.system('"...bat" > outputfilename.txt')
   

   Or directly in your .bat file:

   Application.exe work.xml > outputfilename.txt
   

Yes, you can!

$str = 'One';
$class = 'Class'.$str;
$object = new $class();

When using namespaces, supply the fully qualified name:

$class = '\Foo\Bar\MyClass'; 
$instance = new $class();

Other cool stuff you can do in php are:
Variable variables:

$personCount = 123;
$varname = 'personCount';
echo $$varname; // echo's 123

And variable functions & methods.

$func = 'my_function';
$func('param1'); // calls my_function('param1');

$method = 'doStuff';
$object = new MyClass();
$object->$method(); // calls the MyClass->doStuff() method. 

Another way, without regex

import string
punc = string.punctuation
thestring = "Hey, you - what are you doing here!?"
s = list(thestring)
''.join([o for o in s if not o in punc]).split()

Easiest way to check if they are authenticated is Request.User.IsAuthenticated I think (from memory)

Since the above only works for python 2.x for python 3.x (specifically 3.5) is similar but with a slight modification:

import readline
for i in range(readline.get_current_history_length()):
    print (readline.get_history_item(i + 1))

note the extra ()

(using shell scripts to parse .python_history or using python to modify the above code is a matter of personal taste and situation imho)

I think the easiest from a logical and efficiency point of view is using the queryset's exists() function, documented here:

https://docs.djangoproject.com/en/stable/ref/models/querysets/#django.db.models.query.QuerySet.exists

So in your example above I would simply write:

if User.objects.filter(email = cleaned_info['username']).exists():
    # at least one object satisfying query exists
else:
    # no object satisfying query exists

When the number is not big, everything seems just right. But if it isn't, great caution is required to achieve correctness.

Take double as an example:

If it is not big, as others mentioned you can just try this simply:

doubles.stream().mapToDouble(d -> d).average().orElse(0.0);

However, if it's out of your control and quite big, you have to turn to BigDecimal as follows (methods in the old answers using BigDecimal actually are wrong).

doubles.stream().map(BigDecimal::valueOf).reduce(BigDecimal.ZERO, BigDecimal::add)
       .divide(BigDecimal.valueOf(doubles.size())).doubleValue();

Enclose the tests I carried out to demonstrate my point:

    @Test
    public void testAvgDouble() {
        assertEquals(5.0, getAvgBasic(Stream.of(2.0, 4.0, 6.0, 8.0)), 1E-5);
        List<Double> doubleList = new ArrayList<>(Arrays.asList(Math.pow(10, 308), Math.pow(10, 308), Math.pow(10, 308), Math.pow(10, 308)));
        // Double.MAX_VALUE = 1.7976931348623157e+308
        BigDecimal doubleSum = BigDecimal.ZERO;
        for (Double d : doubleList) {
            doubleSum =  doubleSum.add(new BigDecimal(d.toString()));
        }
        out.println(doubleSum.divide(valueOf(doubleList.size())).doubleValue());
        out.println(getAvgUsingRealBigDecimal(doubleList.stream()));
        out.println(getAvgBasic(doubleList.stream()));
        out.println(getAvgUsingFakeBigDecimal(doubleList.stream()));
    }

    private double getAvgBasic(Stream<Double> doubleStream) {
        return doubleStream.mapToDouble(d -> d).average().orElse(0.0);
    }

    private double getAvgUsingFakeBigDecimal(Stream<Double> doubleStream) {
        return doubleStream.map(BigDecimal::valueOf)
                .collect(Collectors.averagingDouble(BigDecimal::doubleValue));
    }

    private double getAvgUsingRealBigDecimal(Stream<Double> doubleStream) {
        List<Double> doubles = doubleStream.collect(Collectors.toList());
        return doubles.stream().map(BigDecimal::valueOf).reduce(BigDecimal.ZERO, BigDecimal::add)
                .divide(valueOf(doubles.size()), BigDecimal.ROUND_DOWN).doubleValue();
    }

As for Integer or Long, correspondingly you can use BigInteger similarly.

For vector graphics, ImageMagick has both a render resolution and an output size that are independent of each other.

Try something like

convert -density 300 image.eps -resize 1024x1024 image.jpg

Which will render your eps at 300dpi. If 300 * width > 1024, then it will be sharp. If you render it too high though, you waste a lot of memory drawing a really high-res graphic only to down sample it again. I don't currently know of a good way to render it at the "right" resolution in one IM command.

The order of the arguments matters! The -density X argument needs to go before image.eps because you want to affect the resolution that the input file is rendered at.

This is not super obvious in the manpage for convert, but is hinted at:

SYNOPSIS

convert [input-option] input-file [output-option] output-file

if you directly get get max number by writing select query then there may chance that your query will give wrong value. e.g. if your table has 5 records so your increment id will be 6 and if I delete record no 5 the your table has 4 records with max id is 4 in this case you will get 5 as next increment id. insted to that you can get info from mysql defination itself. by writing following code in php

<?
$tablename      = "tablename";
$next_increment     = 0;
$qShowStatus        = "SHOW TABLE STATUS LIKE '$tablename'";
$qShowStatusResult  = mysql_query($qShowStatus) or die ( "Query failed: " . mysql_error() . "<br/>" . $qShowStatus );

$row = mysql_fetch_assoc($qShowStatusResult);
$next_increment = $row['Auto_increment'];

echo "next increment number: [$next_increment]";
?>

No, you don't it's enough to do something like this:

<ul class="clearfix">
  <li>one</li>
  <li>two></li>
</ul>

And the following CSS:

ul li {float: left;}


.clearfix:after {
  content: ".";
  display: block;
  clear: both;
  visibility: hidden;
  line-height: 0;
  height: 0;
}

.clearfix {
  display: inline-block;
}

html[xmlns] .clearfix {
   display: block;
}

* html .clearfix {
   height: 1%;
}

Try using list.AddRange(VTSWeb.GetDailyWorktimeViolations(VehicleID2));

These are the default settings I have for /etc/network/interfaces (including WiFi settings) for my Raspberry Pi 1:

auto lo

iface lo inet loopback
iface eth0 inet dhcp

allow-hotplug wlan0
iface wlan0 inet manual
wpa-roam /etc/wpa_supplicant/wpa_supplicant.conf
iface default inet dhcp

War -

distribute Java-based web applications. A WAR has the same file structure as a JAR file, which is a single compressed file that contains multiple files bundled inside it.

Jar -

The .jar files contain libraries, resources and accessories files like property files.

WAR files are used to combine JSPs, servlets, Java class files, XML files, javascript libraries, JAR libraries, static web pages, and any other resources needed to run the application.

Here's the answer of your 2nd question :

   location / {
        rewrite ^/(.*)$ /$1.php last;
}

it's work for me (based my experience), means that all of your blabla.php will rewrite into blabla

like http://yourwebsite.com/index.php to http://yourwebsite.com/index

Try git fetch so that your local repository gets all the new info from github. It just takes the information about new branches and no actual code. After that the git checkout should work fine.

Use let instead of var in code :

for(let i=1;i<=5;i++){setTimeout(()=>{console.log(i)},1000);}

Below snippet takes more than one map and combine them.

 private static <K, V> Map<K, V> combineMaps(Map<K, V>... maps) {
        if (maps == null || maps.length == 0) {
            return Collections.EMPTY_MAP;
        }

        Map<K, V> result = new HashMap<>();

        for (Map<K, V> map : maps) {
            result.putAll(map);
        }
        return result;
    }

Demo example link.

Simple change to syntax is all that is needed:

 create table ImagenesUsuario (
   idImagen int not null identity(1,1) primary key
 )

By explicitly using the "constraint" keyword, you can give the primary key constraint a particular name rather than depending on SQL Server to auto-assign a name:

 create table ImagenesUsuario (
   idImagen int not null identity(1,1) constraint pk_ImagenesUsario primary key
 )

Add the "CLUSTERED" keyword if that makes the most sense based on your use of the table (i.e., the balance of searches for a particular idImagen and amount of writing outweighs the benefits of clustering the table by some other index).