timespec_get from C11

Returns up to nanoseconds, rounded to the resolution of the implementation.

Looks like an ANSI ripoff from POSIX' clock_gettime.

Example: a printf is done every 100ms on Ubuntu 15.10:

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

static long get_nanos(void) {
    struct timespec ts;
    timespec_get(&ts, TIME_UTC);
    return (long)ts.tv_sec * 1000000000L + ts.tv_nsec;
}

int main(void) {
    long nanos;
    long last_nanos;
    long start;
    nanos = get_nanos();
    last_nanos = nanos;
    start = nanos;
    while (1) {
        nanos = get_nanos();
        if (nanos - last_nanos > 100000000L) {
            printf("current nanos: %ld\n", nanos - start);
            last_nanos = nanos;
        }
    }
    return EXIT_SUCCESS;
}

The C11 N1570 standard draft 7.27.2.5 "The timespec_get function says":

If base is TIME_UTC, the tv_sec member is set to the number of seconds since an implementation defined epoch, truncated to a whole value and the tv_nsec member is set to the integral number of nanoseconds, rounded to the resolution of the system clock. (321)

321) Although a struct timespec object describes times with nanosecond resolution, the available resolution is system dependent and may even be greater than 1 second.

C++11 also got std::chrono::high_resolution_clock: C++ Cross-Platform High-Resolution Timer

glibc 2.21 implementation

Can be found under sysdeps/posix/timespec_get.c as:

int
timespec_get (struct timespec *ts, int base)
{
  switch (base)
    {
    case TIME_UTC:
      if (__clock_gettime (CLOCK_REALTIME, ts) < 0)
        return 0;
      break;

    default:
      return 0;
    }

  return base;
}

so clearly:

• only TIME_UTC is currently supported

• it forwards to __clock_gettime (CLOCK_REALTIME, ts), which is a POSIX API: http://pubs.opengroup.org/onlinepubs/9699919799/functions/clock_getres.html

  Linux x86-64 has a clock_gettime system call.

  Note that this is not a fail-proof micro-benchmarking method because:

  • man clock_gettime says that this measure may have discontinuities if you change some system time setting while your program runs. This should be a rare event of course, and you might be able to ignore it.

  • this measures wall time, so if the scheduler decides to forget about your task, it will appear to run for longer.

  For those reasons getrusage() might be a better better POSIX benchmarking tool, despite it's lower microsecond maximum precision.

  More information at: Measure time in Linux - time vs clock vs getrusage vs clock_gettime vs gettimeofday vs timespec_get?

You can probably use:

os.environ.get('USERNAME')

or

os.environ.get('USER')

But it's not going to be safe because environment variables can be changed.

That helped me with my code.

When I tried feltering only a type of files and show them on screen by adding a condition that tests on each line.

Like this

elif command == 'ls':
    print("directory of ", ftp.pwd())
    data = []
    ftp.dir(data.append)

    for line in data:
        x = line.split(".")
        formats=["gz", "zip", "rar", "tar", "bz2", "xz"]
        if x[-1] in formats:
            print ("-", line)

If you're happy you know what you're doing and can accept the portability problems, on GCC for example you can disable the warning on the command line:

-Wno-multichar

I use this for my own apps to work with AVI and MP4 file headers for similar reasons to you.

Welcome to the wonderful world of portability... or rather the lack of it. Before we start analyzing these two options in detail and take a deeper look how different operating systems handle them, it should be noted that the BSD socket implementation is the mother of all socket implementations. Basically all other systems copied the BSD socket implementation at some point in time (or at least its interfaces) and then started evolving it on their own. Of course the BSD socket implementation was evolved as well at the same time and thus systems that copied it later got features that were lacking in systems that copied it earlier. Understanding the BSD socket implementation is the key to understanding all other socket implementations, so you should read about it even if you don't care to ever write code for a BSD system.

There are a couple of basics you should know before we look at these two options. A TCP/UDP connection is identified by a tuple of five values:

{<protocol>, <src addr>, <src port>, <dest addr>, <dest port>}

Any unique combination of these values identifies a connection. As a result, no two connections can have the same five values, otherwise the system would not be able to distinguish these connections any longer.

The protocol of a socket is set when a socket is created with the socket() function. The source address and port are set with the bind() function. The destination address and port are set with the connect() function. Since UDP is a connectionless protocol, UDP sockets can be used without connecting them. Yet it is allowed to connect them and in some cases very advantageous for your code and general application design. In connectionless mode, UDP sockets that were not explicitly bound when data is sent over them for the first time are usually automatically bound by the system, as an unbound UDP socket cannot receive any (reply) data. Same is true for an unbound TCP socket, it is automatically bound before it will be connected.

If you explicitly bind a socket, it is possible to bind it to port 0, which means "any port". Since a socket cannot really be bound to all existing ports, the system will have to choose a specific port itself in that case (usually from a predefined, OS specific range of source ports). A similar wildcard exists for the source address, which can be "any address" (0.0.0.0 in case of IPv4 and :: in case of IPv6). Unlike in case of ports, a socket can really be bound to "any address" which means "all source IP addresses of all local interfaces". If the socket is connected later on, the system has to choose a specific source IP address, since a socket cannot be connected and at the same time be bound to any local IP address. Depending on the destination address and the content of the routing table, the system will pick an appropriate source address and replace the "any" binding with a binding to the chosen source IP address.

By default, no two sockets can be bound to the same combination of source address and source port. As long as the source port is different, the source address is actually irrelevant. Binding socketA to ipA:portA and socketB to ipB:portB is always possible if ipA != ipB holds true, even when portA == portB. E.g. socketA belongs to a FTP server program and is bound to 192.168.0.1:21 and socketB belongs to another FTP server program and is bound to 10.0.0.1:21, both bindings will succeed. Keep in mind, though, that a socket may be locally bound to "any address". If a socket is bound to 0.0.0.0:21, it is bound to all existing local addresses at the same time and in that case no other socket can be bound to port 21, regardless which specific IP address it tries to bind to, as 0.0.0.0 conflicts with all existing local IP addresses.

Anything said so far is pretty much equal for all major operating system. Things start to get OS specific when address reuse comes into play. We start with BSD, since as I said above, it is the mother of all socket implementations.

BSD

SO_REUSEADDR

If SO_REUSEADDR is enabled on a socket prior to binding it, the socket can be successfully bound unless there is a conflict with another socket bound to exactly the same combination of source address and port. Now you may wonder how is that any different than before? The keyword is "exactly". SO_REUSEADDR mainly changes the way how wildcard addresses ("any IP address") are treated when searching for conflicts.

Without SO_REUSEADDR, binding socketA to 0.0.0.0:21 and then binding socketB to 192.168.0.1:21 will fail (with error EADDRINUSE), since 0.0.0.0 means "any local IP address", thus all local IP addresses are considered in use by this socket and this includes 192.168.0.1, too. With SO_REUSEADDR it will succeed, since 0.0.0.0 and 192.168.0.1 are not exactly the same address, one is a wildcard for all local addresses and the other one is a very specific local address. Note that the statement above is true regardless in which order socketA and socketB are bound; without SO_REUSEADDR it will always fail, with SO_REUSEADDR it will always succeed.

To give you a better overview, let's make a table here and list all possible combinations:

SO_REUSEADDR       socketA        socketB       Result
---------------------------------------------------------------------
  ON/OFF       192.168.0.1:21   192.168.0.1:21    Error (EADDRINUSE)
  ON/OFF       192.168.0.1:21      10.0.0.1:21    OK
  ON/OFF          10.0.0.1:21   192.168.0.1:21    OK
   OFF             0.0.0.0:21   192.168.1.0:21    Error (EADDRINUSE)
   OFF         192.168.1.0:21       0.0.0.0:21    Error (EADDRINUSE)
   ON              0.0.0.0:21   192.168.1.0:21    OK
   ON          192.168.1.0:21       0.0.0.0:21    OK
  ON/OFF           0.0.0.0:21       0.0.0.0:21    Error (EADDRINUSE)

The table above assumes that socketA has already been successfully bound to the address given for socketA, then socketB is created, either gets SO_REUSEADDR set or not, and finally is bound to the address given for socketB. Result is the result of the bind operation for socketB. If the first column says ON/OFF, the value of SO_REUSEADDR is irrelevant to the result.

Okay, SO_REUSEADDR has an effect on wildcard addresses, good to know. Yet that isn't it's only effect it has. There is another well known effect which is also the reason why most people use SO_REUSEADDR in server programs in the first place. For the other important use of this option we have to take a deeper look on how the TCP protocol works.

A socket has a send buffer and if a call to the send() function succeeds, it does not mean that the requested data has actually really been sent out, it only means the data has been added to the send buffer. For UDP sockets, the data is usually sent pretty soon, if not immediately, but for TCP sockets, there can be a relatively long delay between adding data to the send buffer and having the TCP implementation really send that data. As a result, when you close a TCP socket, there may still be pending data in the send buffer, which has not been sent yet but your code considers it as sent, since the send() call succeeded. If the TCP implementation was closing the socket immediately on your request, all of this data would be lost and your code wouldn't even know about that. TCP is said to be a reliable protocol and losing data just like that is not very reliable. That's why a socket that still has data to send will go into a state called TIME_WAIT when you close it. In that state it will wait until all pending data has been successfully sent or until a timeout is hit, in which case the socket is closed forcefully.

At most, the amount of time the kernel will wait before it closes the socket, regardless if it still has data in flight or not, is called the Linger Time. The Linger Time is globally configurable on most systems and by default rather long (two minutes is a common value you will find on many systems). It is also configurable per socket using the socket option SO_LINGER which can be used to make the timeout shorter or longer, and even to disable it completely. Disabling it completely is a very bad idea, though, since closing a TCP socket gracefully is a slightly complex process and involves sending forth and back a couple of packets (as well as resending those packets in case they got lost) and this whole close process is also limited by the Linger Time. If you disable lingering, your socket may not only lose data in flight, it is also always closed forcefully instead of gracefully, which is usually not recommended. The details about how a TCP connection is closed gracefully are beyond the scope of this answer, if you want to learn more about, I recommend you have a look at this page. And even if you disabled lingering with SO_LINGER, if your process dies without explicitly closing the socket, BSD (and possibly other systems) will linger nonetheless, ignoring what you have configured. This will happen for example if your code just calls exit() (pretty common for tiny, simple server programs) or the process is killed by a signal (which includes the possibility that it simply crashes because of an illegal memory access). So there is nothing you can do to make sure a socket will never linger under all circumstances.

The question is, how does the system treat a socket in state TIME_WAIT? If SO_REUSEADDR is not set, a socket in state TIME_WAIT is considered to still be bound to the source address and port and any attempt to bind a new socket to the same address and port will fail until the socket has really been closed, which may take as long as the configured Linger Time. So don't expect that you can rebind the source address of a socket immediately after closing it. In most cases this will fail. However, if SO_REUSEADDR is set for the socket you are trying to bind, another socket bound to the same address and port in state TIME_WAIT is simply ignored, after all its already "half dead", and your socket can bind to exactly the same address without any problem. In that case it plays no role that the other socket may have exactly the same address and port. Note that binding a socket to exactly the same address and port as a dying socket in TIME_WAIT state can have unexpected, and usually undesired, side effects in case the other socket is still "at work", but that is beyond the scope of this answer and fortunately those side effects are rather rare in practice.

There is one final thing you should know about SO_REUSEADDR. Everything written above will work as long as the socket you want to bind to has address reuse enabled. It is not necessary that the other socket, the one which is already bound or is in a TIME_WAIT state, also had this flag set when it was bound. The code that decides if the bind will succeed or fail only inspects the SO_REUSEADDR flag of the socket fed into the bind() call, for all other sockets inspected, this flag is not even looked at.

SO_REUSEPORT

SO_REUSEPORT is what most people would expect SO_REUSEADDR to be. Basically, SO_REUSEPORT allows you to bind an arbitrary number of sockets to exactly the same source address and port as long as all prior bound sockets also had SO_REUSEPORT set before they were bound. If the first socket that is bound to an address and port does not have SO_REUSEPORT set, no other socket can be bound to exactly the same address and port, regardless if this other socket has SO_REUSEPORT set or not, until the first socket releases its binding again. Unlike in case of SO_REUESADDR the code handling SO_REUSEPORT will not only verify that the currently bound socket has SO_REUSEPORT set but it will also verify that the socket with a conflicting address and port had SO_REUSEPORT set when it was bound.

SO_REUSEPORT does not imply SO_REUSEADDR. This means if a socket did not have SO_REUSEPORT set when it was bound and another socket has SO_REUSEPORT set when it is bound to exactly the same address and port, the bind fails, which is expected, but it also fails if the other socket is already dying and is in TIME_WAIT state. To be able to bind a socket to the same addresses and port as another socket in TIME_WAIT state requires either SO_REUSEADDR to be set on that socket or SO_REUSEPORT must have been set on both sockets prior to binding them. Of course it is allowed to set both, SO_REUSEPORT and SO_REUSEADDR, on a socket.

There is not much more to say about SO_REUSEPORT other than that it was added later than SO_REUSEADDR, that's why you will not find it in many socket implementations of other systems, which "forked" the BSD code before this option was added, and that there was no way to bind two sockets to exactly the same socket address in BSD prior to this option.

Connect() Returning EADDRINUSE?

Most people know that bind() may fail with the error EADDRINUSE, however, when you start playing around with address reuse, you may run into the strange situation that connect() fails with that error as well. How can this be? How can a remote address, after all that's what connect adds to a socket, be already in use? Connecting multiple sockets to exactly the same remote address has never been a problem before, so what's going wrong here?

As I said on the very top of my reply, a connection is defined by a tuple of five values, remember? And I also said, that these five values must be unique otherwise the system cannot distinguish two connections any longer, right? Well, with address reuse, you can bind two sockets of the same protocol to the same source address and port. That means three of those five values are already the same for these two sockets. If you now try to connect both of these sockets also to the same destination address and port, you would create two connected sockets, whose tuples are absolutely identical. This cannot work, at least not for TCP connections (UDP connections are no real connections anyway). If data arrived for either one of the two connections, the system could not tell which connection the data belongs to. At least the destination address or destination port must be different for either connection, so that the system has no problem to identify to which connection incoming data belongs to.

So if you bind two sockets of the same protocol to the same source address and port and try to connect them both to the same destination address and port, connect() will actually fail with the error EADDRINUSE for the second socket you try to connect, which means that a socket with an identical tuple of five values is already connected.

Multicast Addresses

Most people ignore the fact that multicast addresses exist, but they do exist. While unicast addresses are used for one-to-one communication, multicast addresses are used for one-to-many communication. Most people got aware of multicast addresses when they learned about IPv6 but multicast addresses also existed in IPv4, even though this feature was never widely used on the public Internet.

The meaning of SO_REUSEADDR changes for multicast addresses as it allows multiple sockets to be bound to exactly the same combination of source multicast address and port. In other words, for multicast addresses SO_REUSEADDR behaves exactly as SO_REUSEPORT for unicast addresses. Actually, the code treats SO_REUSEADDR and SO_REUSEPORT identically for multicast addresses, that means you could say that SO_REUSEADDR implies SO_REUSEPORT for all multicast addresses and the other way round.

FreeBSD/OpenBSD/NetBSD

All these are rather late forks of the original BSD code, that's why they all three offer the same options as BSD and they also behave the same way as in BSD.

macOS (MacOS X)

At its core, macOS is simply a BSD-style UNIX named "Darwin", based on a rather late fork of the BSD code (BSD 4.3), which was then later on even re-synchronized with the (at that time current) FreeBSD 5 code base for the Mac OS 10.3 release, so that Apple could gain full POSIX compliance (macOS is POSIX certified). Despite having a microkernel at its core ("Mach"), the rest of the kernel ("XNU") is basically just a BSD kernel, and that's why macOS offers the same options as BSD and they also behave the same way as in BSD.

iOS / watchOS / tvOS

iOS is just a macOS fork with a slightly modified and trimmed kernel, somewhat stripped down user space toolset and a slightly different default framework set. watchOS and tvOS are iOS forks, that are stripped down even further (especially watchOS). To my best knowledge they all behave exactly as macOS does.

Linux

Linux < 3.9

Prior to Linux 3.9, only the option SO_REUSEADDR existed. This option behaves generally the same as in BSD with two important exceptions:

1. As long as a listening (server) TCP socket is bound to a specific port, the SO_REUSEADDR option is entirely ignored for all sockets targeting that port. Binding a second socket to the same port is only possible if it was also possible in BSD without having SO_REUSEADDR set. E.g. you cannot bind to a wildcard address and then to a more specific one or the other way round, both is possible in BSD if you set SO_REUSEADDR. What you can do is you can bind to the same port and two different non-wildcard addresses, as that's always allowed. In this aspect Linux is more restrictive than BSD.

2. The second exception is that for client sockets, this option behaves exactly like SO_REUSEPORT in BSD, as long as both had this flag set before they were bound. The reason for allowing that was simply that it is important to be able to bind multiple sockets to exactly to the same UDP socket address for various protocols and as there used to be no SO_REUSEPORT prior to 3.9, the behavior of SO_REUSEADDR was altered accordingly to fill that gap. In that aspect Linux is less restrictive than BSD.

Linux >= 3.9

Linux 3.9 added the option SO_REUSEPORT to Linux as well. This option behaves exactly like the option in BSD and allows binding to exactly the same address and port number as long as all sockets have this option set prior to binding them.

Yet, there are still two differences to SO_REUSEPORT on other systems:

1. To prevent "port hijacking", there is one special limitation: All sockets that want to share the same address and port combination must belong to processes that share the same effective user ID! So one user cannot "steal" ports of another user. This is some special magic to somewhat compensate for the missing SO_EXCLBIND/SO_EXCLUSIVEADDRUSE flags.

2. Additionally the kernel performs some "special magic" for SO_REUSEPORT sockets that isn't found in other operating systems: For UDP sockets, it tries to distribute datagrams evenly, for TCP listening sockets, it tries to distribute incoming connect requests (those accepted by calling accept()) evenly across all the sockets that share the same address and port combination. Thus an application can easily open the same port in multiple child processes and then use SO_REUSEPORT to get a very inexpensive load balancing.

Android

Even though the whole Android system is somewhat different from most Linux distributions, at its core works a slightly modified Linux kernel, thus everything that applies to Linux should apply to Android as well.

Windows

Windows only knows the SO_REUSEADDR option, there is no SO_REUSEPORT. Setting SO_REUSEADDR on a socket in Windows behaves like setting SO_REUSEPORT and SO_REUSEADDR on a socket in BSD, with one exception:

Prior to Windows 2003, a socket with SO_REUSEADDR could always been bound to exactly the same source address and port as an already bound socket, even if the other socket did not have this option set when it was bound. This behavior allowed an application "to steal" the connected port of another application. Needless to say that this has major security implications!

Microsoft realized that and added another important socket option: SO_EXCLUSIVEADDRUSE. Setting SO_EXCLUSIVEADDRUSE on a socket makes sure that if the binding succeeds, the combination of source address and port is owned exclusively by this socket and no other socket can bind to them, not even if it has SO_REUSEADDR set.

This default behavior was changed first in Windows 2003, Microsoft calls that "Enhanced Socket Security" (funny name for a behavior that is default on all other major operating systems). For more details just visit this page. There are three tables: The first one shows the classic behavior (still in use when using compatibility modes!), the second one shows the behavior of Windows 2003 and up when the bind() calls are made by the same user, and the third one when the bind() calls are made by different users.

Solaris

Solaris is the successor of SunOS. SunOS was originally based on a fork of BSD, SunOS 5 and later was based on a fork of SVR4, however SVR4 is a merge of BSD, System V, and Xenix, so up to some degree Solaris is also a BSD fork, and a rather early one. As a result Solaris only knows SO_REUSEADDR, there is no SO_REUSEPORT. The SO_REUSEADDR behaves pretty much the same as it does in BSD. As far as I know there is no way to get the same behavior as SO_REUSEPORT in Solaris, that means it is not possible to bind two sockets to exactly the same address and port.

Similar to Windows, Solaris has an option to give a socket an exclusive binding. This option is named SO_EXCLBIND. If this option is set on a socket prior to binding it, setting SO_REUSEADDR on another socket has no effect if the two sockets are tested for an address conflict. E.g. if socketA is bound to a wildcard address and socketB has SO_REUSEADDR enabled and is bound to a non-wildcard address and the same port as socketA, this bind will normally succeed, unless socketA had SO_EXCLBIND enabled, in which case it will fail regardless the SO_REUSEADDR flag of socketB.

Other Systems

In case your system is not listed above, I wrote a little test program that you can use to find out how your system handles these two options. Also if you think my results are wrong, please first run that program before posting any comments and possibly making false claims.

All that the code requires to build is a bit POSIX API (for the network parts) and a C99 compiler (actually most non-C99 compiler will work as well as long as they offer inttypes.h and stdbool.h; e.g. gcc supported both long before offering full C99 support).

All that the program needs to run is that at least one interface in your system (other than the local interface) has an IP address assigned and that a default route is set which uses that interface. The program will gather that IP address and use it as the second "specific address".

It tests all possible combinations you can think of:

• TCP and UDP protocol
• Normal sockets, listen (server) sockets, multicast sockets
• SO_REUSEADDR set on socket1, socket2, or both sockets
• SO_REUSEPORT set on socket1, socket2, or both sockets
• All address combinations you can make out of 0.0.0.0 (wildcard), 127.0.0.1 (specific address), and the second specific address found at your primary interface (for multicast it's just 224.1.2.3 in all tests)

and prints the results in a nice table. It will also work on systems that don't know SO_REUSEPORT, in which case this option is simply not tested.

What the program cannot easily test is how SO_REUSEADDR acts on sockets in TIME_WAIT state as it's very tricky to force and keep a socket in that state. Fortunately most operating systems seems to simply behave like BSD here and most of the time programmers can simply ignore the existence of that state.

Here's the code (I cannot include it here, answers have a size limit and the code would push this reply over the limit).

You have some special words from CMAKE, take a look:

if(${CMAKE_SYSTEM_NAME} STREQUAL "Linux")
    // do something for Linux
else
    // do something for other OS

The equivalent of unistd.h on Windows is windows.h

For Microsoft, the answer is different. VS2013 is largely C99 compliant but "[t]he hh, j, z, and t length prefixes are not supported." For size_t "that is, unsigned __int32 on 32-bit platforms, unsigned __int64 on 64-bit platforms" use prefix I (capital eye) with type specifier o, u, x, or X. See VS2013 Size specification

As for off_t, it is defined as long in VC\include\sys\types.h.

Just to update this answer for the sake of others who happen to end up on this page.

In Rails 3, you just need to create a file at views/users/show.json.erb. The @user object will be available to the view (just like it would be for html.) You don't even need to_json anymore.

To summarize, it's just

# users contoller
def show
  @user = User.find( params[:id] )
  respond_to do |format|
    format.html
    format.json
  end
end

and

/* views/users/show.json.erb */
{
    "name" : "<%= @user.name %>"
}

Another way to do that is StringTokenizer. ex:-

 public static void main(String[] args) {

    String str = "This is a sample string";
    StringTokenizer st = new StringTokenizer(str," ");
    String starr[]=new String[st.countTokens()];
    while (st.hasMoreElements()) {
        starr[i++]=st.nextElement();
    }
}

Be sure you have C++ Redistributable for Visual Studio 2015 RC. Try to download the last version:

https://www.microsoft.com/en-us/download/details.aspx?id=52685

Obs: Credit to parsecer

Try executing this SQL command:

> grant all privileges 
  on YOUR_DATABASE.* 
  to 'asdfsdf'@'localhost' 
  identified by 'your_password';
> flush privileges; 

It seems that you are having issues with connecting to the database and not writing to the folder you’re mentioning.

Also, make sure you have granted FILE to user 'asdfsdf'@'localhost'.

> GRANT FILE ON *.* TO 'asdfsdf'@'localhost';

No, you don't need to add them as a remote. That would be clumbersome and a pain to do each time.

Grabbing their commits:

git fetch [email protected]:theirusername/reponame.git theirbranch:ournameforbranch

This creates a local branch named ournameforbranch which is exactly the same as what theirbranch was for them. For the question example, the last argument would be foo:foo.

Note :ournameforbranch part can be further left off if thinking up a name that doesn't conflict with one of your own branches is bothersome. In that case, a reference called FETCH_HEAD is available. You can git log FETCH_HEAD to see their commits then do things like cherry-picked to cherry pick their commits.

Pushing it back to them:

Oftentimes, you want to fix something of theirs and push it right back. That's possible too:

git fetch [email protected]:theirusername/reponame.git theirbranch
git checkout FETCH_HEAD

# fix fix fix

git push [email protected]:theirusername/reponame.git HEAD:theirbranch

If working in detached state worries you, by all means create a branch using :ournameforbranch and replace FETCH_HEAD and HEAD above with ournameforbranch.

assertEquals(expected, result); works for me. Since this function gets two objects, you can pass anything to it.

public static void assertEquals(Object expected, Object actual) {
    AssertEquals.assertEquals(expected, actual);
}

There are lots of systems that support LDAP to talk to them, not just Active Directory.

Sun, IBM, Novell all have directory services that are very effective as LDAP servers.

Excellent answers so far but some tidbits are missing. A single leading underscore isn't exactly just a convention: if you use from foobar import *, and module foobar does not define an __all__ list, the names imported from the module do not include those with a leading underscore. Let's say it's mostly a convention, since this case is a pretty obscure corner;-).

The leading-underscore convention is widely used not just for private names, but also for what C++ would call protected ones -- for example, names of methods that are fully intended to be overridden by subclasses (even ones that have to be overridden since in the base class they raise NotImplementedError!-) are often single-leading-underscore names to indicate to code using instances of that class (or subclasses) that said methods are not meant to be called directly.

For example, to make a thread-safe queue with a different queueing discipline than FIFO, one imports Queue, subclasses Queue.Queue, and overrides such methods as _get and _put; "client code" never calls those ("hook") methods, but rather the ("organizing") public methods such as put and get (this is known as the Template Method design pattern -- see e.g. here for an interesting presentation based on a video of a talk of mine on the subject, with the addition of synopses of the transcript).

Edit: The video links in the description of the talks are now broken. You can find the first two videos here and here.

The database is a MySQL database, not a phpMyAdmin database. phpMyAdmin is only PHP code that connects to the DB.

mysql_connect('localhost', 'username', 'password') or die (mysql_error());
mysql_select_database('db_name') or die (mysql_error());

// now you are connected

I still prefer using dc, which is an RPN calculator, so quick session to divide 67 by 18 with 4 digits precision would look like

>dc
4k
67
18/p
3.7222
q
>

Obviously, much more available: man dc

Firefox now (since 58) uses a SQLite database cert9.db instead of legacy cert8.db. I have made a fix to a solution presented here to make it work with new versions of Firefox:

certificateFile="MyCa.cert.pem"
certificateName="MyCA Name" 
for certDB in $(find  ~/.mozilla* ~/.thunderbird -name "cert9.db")
do
  certDir=$(dirname ${certDB});
  #log "mozilla certificate" "install '${certificateName}' in ${certDir}"
  certutil -A -n "${certificateName}" -t "TCu,Cuw,Tuw" -i ${certificateFile} -d sql:${certDir}
done

Do not use the * selector as that will apply to all elements on the page. Suppose you have a structure like this:

...
<body>
    <div id="content">
        <b>This is the main container.</b>
    </div>
</body>
</html>

You can then center the #content div using:

#content {
    width: 400px;
    margin: 0 auto;
    background-color: #66ffff;
}

Don't know what you've seen elsewhere but this is the way to go. The * { margin: 0; padding: 0; } snippet you've seen is for resetting browser's default definitions for all browsers to make your site behave similarly on all browsers, this has nothing to do with centering the main container.

Most browsers apply a default margin and padding to some elements which usually isn't consistent with other browsers' implementations. This is why it is often considered smart to use this kind of 'resetting'. The reset snippet you presented is the most simplest of reset stylesheets, you can read more about the subject here:

• http://meyerweb.com/eric/tools/css/reset/

If you need to store a member function without the class instance, you can do something like this:

class MyClass
{
public:
    void MemberFunc(int value)
    {
      //do something
    }
};

// Store member function binding
auto callable = std::mem_fn(&MyClass::MemberFunc);

// Call with late supplied 'this'
MyClass myInst;
callable(&myInst, 123);

What would the storage type look like without auto? Something like this:

std::_Mem_fn_wrap<void,void (__cdecl TestA::*)(int),TestA,int> callable

You can also pass this function storage to a standard function binding

std::function<void(int)> binding = std::bind(callable, &testA, std::placeholders::_1);
binding(123); // Call

Past and future notes: An older interface std::mem_func existed, but has since been deprecated. A proposal exists, post C++17, to make pointer to member functions callable. This would be most welcome.

If you're not interested in the details that git diff outputs you can just run git cherry which will output a list of commits your remote tracking branch has ahead of your local branch.

For example:

git fetch origin
git cherry master origin/master

Will output something like :

+ 2642039b1a4c4d4345a0d02f79ccc3690e19d9b1
+ a4870f9fbde61d2d657e97b72b61f46d1fd265a9

Indicates that there are two commits in my remote tracking branch that haven't been merged into my local branch.

This also works the other way :

    git cherry origin/master master

Will show you a list of local commits that you haven't pushed to your remote repository yet.

formatter = new SimpleDateFormat("dd-MMM-yy");

the first two use lambda, the third uses regular code... hope you find it helpful

            //Trust all certificates
            System.Net.ServicePointManager.ServerCertificateValidationCallback =
                ((sender, certificate, chain, sslPolicyErrors) => true);

            // trust sender
            System.Net.ServicePointManager.ServerCertificateValidationCallback
                = ((sender, cert, chain, errors) => cert.Subject.Contains("YourServerName"));

            // validate cert by calling a function
            ServicePointManager.ServerCertificateValidationCallback += new RemoteCertificateValidationCallback(ValidateRemoteCertificate);

    // callback used to validate the certificate in an SSL conversation
    private static bool ValidateRemoteCertificate(object sender, X509Certificate cert, X509Chain chain, SslPolicyErrors policyErrors)
    {
        bool result = false;
        if (cert.Subject.ToUpper().Contains("YourServerName"))
        {
            result = true;
        }

        return result;
    }

The stringified keys can be queried with Object.keys(array).

This sometimes happens when a string is converted from Windows-1252 to UTF-8 twice.

We had this in a Zend/PHP/MySQL application where characters like that were appearing in the database, probably due to the MySQL connection not specifying the correct character set. We had to:

1. Ensure Zend and PHP were communicating with the database in UTF-8 (was not by default)

2. Repair the broken characters with several SQL queries like this...

   UPDATE MyTable SET 
   MyField1 = CONVERT(CAST(CONVERT(MyField1 USING latin1) AS BINARY) USING utf8),
   MyField2 = CONVERT(CAST(CONVERT(MyField2 USING latin1) AS BINARY) USING utf8);
   

   Do this for as many tables/columns as necessary.

You can also fix some of these strings in PHP if necessary. Note that because characters have been encoded twice, we actually need to do a reverse conversion from UTF-8 back to Windows-1252, which confused me at first.

mb_convert_encoding('’', 'Windows-1252', 'UTF-8');    // returns ’

change it to Console (/SUBSYSTEM:CONSOLE) it will work

You can set the forground color to black such:

:: see https://stackoverflow.com/questions/33293220/what-is-the-fastest-color-function-in-batch
@echo off
for /F %%a in ('echo prompt $E ^| cmd') do set "ESC=%%a"
set color_white=%ESC%[37m
set color_black=%ESC%[30m
echo(
set /p user=Username:
set /p pass=password:%color_black%
echo %color_white%
echo blablablba

Enjoy!!! C.

You can use CTE also like below.

With cte as
(select Activity, SUM(Amount) as "Total Amount 2009"
   from Activities, Incomes
  where Activities.UnitName = ? AND
        Incomes.ActivityId = Activities.ActivityID
  GROUP BY Activity
),
cte1 as 
(select Activity, SUM(Amount) as "Total Amount 2008"
   from Activities, Incomes2008
  where Activities.UnitName = ? AND
        Incomes2008.ActivityId = Activities.ActivityID
  GROUP BY Activity
)
Select cte.Activity, cte.[Total Amount 2009] ,cte1.[Total Amount 2008]      
  from cte join cte1 ON cte.ActivityId = cte1.ActivityID
 WHERE a.UnitName = ?
 ORDER BY cte.Activity 

import urllib, urllib2, cookielib

username = 'myuser'
password = 'mypassword'

cj = cookielib.CookieJar()
opener = urllib2.build_opener(urllib2.HTTPCookieProcessor(cj))
login_data = urllib.urlencode({'username' : username, 'j_password' : password})
opener.open('http://www.example.com/login.php', login_data)
resp = opener.open('http://www.example.com/hiddenpage.php')
print resp.read()

resp.read() is the straight html of the page you want to open, and you can use opener to view any page using your session cookie.

I think the reason AngularJS does not say much about form submission because it depends more on 'two-way data binding'. In traditional html development you had one way data binding, i.e. once DOM rendered any changes you make to DOM element did not reflect in JS Object, however in AngularJS it works both way. Hence there's in fact no need to form submission. I have done a mid sized application using AngularJS without the need to form submission. If you are keen to submit form you can write a directive wrapping up your form which handles ENTER keydown and SUBMIT button click events and call form.submit().

If you want the sample source code of such a directive, please let me know by commenting on this. I figured out it would a simple directive that you can write yourself.

See Introduction to the POM

finalName is created as:

<build>
    <finalName>${project.artifactId}-${project.version}</finalName>
</build>

One of the solutions is to add own property:

<properties>
    <finalName>${project.artifactId}-${project.version}</finalName>
</properties>
<build>
    <finalName>${finalName}</finalName>
 </build>

And now try:

mvn -DfinalName=build clean package

Django's parse_datetime() function supports dates with UTC offsets:

parse_datetime('2016-08-09T15:12:03.65478Z') =
datetime.datetime(2016, 8, 9, 15, 12, 3, 654780, tzinfo=<UTC>)

So it could be used for parsing ISO 8601 dates in fields within entire project:

from django.utils import formats
from django.forms.fields import DateTimeField
from django.utils.dateparse import parse_datetime

class DateTimeFieldFixed(DateTimeField):
    def strptime(self, value, format):
        if format == 'iso-8601':
            return parse_datetime(value)
        return super().strptime(value, format)

DateTimeField.strptime = DateTimeFieldFixed.strptime
formats.ISO_INPUT_FORMATS['DATETIME_INPUT_FORMATS'].insert(0, 'iso-8601')

Assuming code.cpp is the source code, the following will not throw errors:

make code
./code

Here the first command compiles the code and creates an executable with the same name, and the second command runs it. There is no need to specify g++ keyword in this case.

xcopy  e:\source_folder f:\destination_folder /e /i /h

The /h is just in case there are hidden files. The /i creates a destination folder if there are muliple source files.

Or just call mysql command with --version option.

mysql --version

Two more ways to do it (see my comment on the previous answer by @Tomasz Nurkiewicz):

The first relies on the fact that the compiler simply won't let you pass in something of the wrong type:

when(a.method(any(Class.class))).thenReturn(b);

You lose the exact typing (the Class<? extends A>) but it probably works as you need it to.

The second is a lot more involved but is arguably a better solution if you really want to be sure that the argument to method() is an A or a subclass of A:

when(a.method(Matchers.argThat(new ClassOrSubclassMatcher<A>(A.class)))).thenReturn(b);

Where ClassOrSubclassMatcher is an org.hamcrest.BaseMatcher defined as:

public class ClassOrSubclassMatcher<T> extends BaseMatcher<Class<T>> {

    private final Class<T> targetClass;

    public ClassOrSubclassMatcher(Class<T> targetClass) {
        this.targetClass = targetClass;
    }

    @SuppressWarnings("unchecked")
    public boolean matches(Object obj) {
        if (obj != null) {
            if (obj instanceof Class) {
                return targetClass.isAssignableFrom((Class<T>) obj);
            }
        }
        return false;
    }

    public void describeTo(Description desc) {
        desc.appendText("Matches a class or subclass");
    }       
}

Phew! I'd go with the first option until you really need to get finer control over what method() actually returns :-)

Set a:hover based on class you can simply try:

a.main-nav-item:hover { }

Both pandas and matplotlib.dates use matplotlib.units for locating the ticks.

But while matplotlib.dates has convenient ways to set the ticks manually, pandas seems to have the focus on auto formatting so far (you can have a look at the code for date conversion and formatting in pandas).

So for the moment it seems more reasonable to use matplotlib.dates (as mentioned by @BrenBarn in his comment).

import numpy as np
import pandas as pd
import matplotlib.pyplot as plt 
import matplotlib.dates as dates

idx = pd.date_range('2011-05-01', '2011-07-01')
s = pd.Series(np.random.randn(len(idx)), index=idx)

fig, ax = plt.subplots()
ax.plot_date(idx.to_pydatetime(), s, 'v-')
ax.xaxis.set_minor_locator(dates.WeekdayLocator(byweekday=(1),
                                                interval=1))
ax.xaxis.set_minor_formatter(dates.DateFormatter('%d\n%a'))
ax.xaxis.grid(True, which="minor")
ax.yaxis.grid()
ax.xaxis.set_major_locator(dates.MonthLocator())
ax.xaxis.set_major_formatter(dates.DateFormatter('\n\n\n%b\n%Y'))
plt.tight_layout()
plt.show()

(my locale is German, so that Tuesday [Tue] becomes Dienstag [Di])

That is the output of Object's "toString()" implementation. If your class overrides toString(), it will print something entirely different.

This worked for me. I have done like, when i click on the menu button, im adding or removing the class 'in' because by adding or removing that class the toggle is working by default. 'e.stopPropagation()' is to stop the default animation by bootstrap(i guess) you can also use the 'toggleClass' in place of add or remove class.

$('#ChangeToggle').on('click', function (e) {

        if ($('.navbar-collapse').hasClass('in')) {
            $('.navbar-collapse').removeClass('in');
            e.stopPropagation();
        } else {
            $('.navbar-collapse').addClass('in');
            $('.navbar-collapse').collapse();
        }

    });

Conventional Definition - An interface is a contract that specifies the methods which needs to be implemented by the class implementing it.

The Definition of Interface has changed over time. Do you think Interface just have method declarations only ? What about static final variables and what about default definitions after Java 5.

Interfaces were introduced to Java because of the Diamond problem with multiple Inheritance and that's what they actually intend to do.

Interfaces are the constructs that were created to get away with the multiple inheritance problem and can have abstract methods , default definitions and static final variables.

http://www.quora.com/Why-does-Java-allow-static-final-variables-in-interfaces-when-they-are-only-intended-to-be-contracts

You can't modify strings; they're immutable. You can do this instead:

txtBox.Text = txtBox.Text.Substring(0, i) + "TEXT" + txtBox.Text.Substring(i);

To start with Socket.IO I suggest you read first the example on the main page:

http://socket.io/

On the server side, read the "How to use" on the GitHub source page:

https://github.com/Automattic/socket.io

And on the client side:

https://github.com/Automattic/socket.io-client

Finally you need to read this great tutorial:

http://howtonode.org/websockets-socketio

Hint: At the end of this blog post, you will have some links pointing on source code that could be some help.

$ is a function provided by the jQuery library, it won't be available unless you have loaded the jQuery library.

You need to add jQuery (typically with a <script> element which can point at a local copy of the library or one hosted on a CDN). Make sure you are using a current and supported version: Many answers on this question recommend using 1.x or 2.x versions of jQuery which are no longer supported and have known security issues.

<script src="/path/to/jquery.js"></script>

Make sure you load jQuery before you run any script which depends on it.

The jQuery homepage will have a link to download the current version of the library (at the time of writing it is 3.5.1 but that may change by the time you read this).

Further down the page you will find a section on using jQuery with a CDN which links to a number of places that will host the library for you.

(NB: Some other libraries provide a $ function, and browsers have native $ variables which are only available in the Developer Tools Console, but this question isn't about those).

 typeof(text) === 'string' || text instanceof String; 

you can use this, it will work for both case as

1. var text="foo"; // typeof will work

2. String text= new String("foo"); // instanceof will work

Per the Javadoc:

Returns the value of a request parameter as a String, or null if the parameter does not exist.

Do note that it is possible to submit an empty parameter - such that the parameter exists, but has no value. For example, I could include &log=&somethingElse into the URL to enable logging, without needing to specify &log=true. In this case, the value will be an empty String ("").

Try to use the following code. It will help you in full or more.

1. A .xml file designed to use this code to set background color:

   android:background="#000000"
   

   or

   android:background="#FFFFFF"
   

   

   Or you can set it programmatically as well.

2. Also you can use this code programmatically:

   image.setBackgroundDrawable(getResources().getDrawable(
       R.drawable.llabackground));
   

3. Also this code for setting the background color as well programmatically:

   image.setBackgroundColor(Color.parseColor("#FFFFFF"));
   

4. This code for the same programmatically:

   image.setBackgroundColor(getResources().getColor(Color.WHITE));
   

The color depends on your choice of which color you want to use for transparent. Mostly use a white or #FFFFFF color.

Regarding R.drawable.llabackground: This line of code is for your style of the background, like something special or different for your purpose. You can also use this.

The timer has special functions.

1. Call an asynchronous timer or synchronous timer.
2. Change the time interval
3. Ability to cancel and resume  

if you use StartAsync () or Start (), the thread does not block the user interface element

     namespace UITimer


     {
        using thread = System.Threading;
        public class Timer
        {

        public event Action<thread::SynchronizationContext> TaskAsyncTick;
        public event Action Tick;
        public event Action AsyncTick;
        public int Interval { get; set; } = 1;
        private bool canceled = false;
        private bool canceling = false;
        public async void Start()
        {
            while(true)
            {

                if (!canceled)
                {
                    if (!canceling)
                    {
                        await Task.Delay(Interval);
                        Tick.Invoke();
                    }
                }
                else
                {
                    canceled = false;
                    break;
                }
            }


        }
        public void Resume()
        {
            canceling = false;
        }
        public void Cancel()
        {
            canceling = true;
        }
        public async void StartAsyncTask(thread::SynchronizationContext 
        context)
        {

                while (true)
                {
                    if (!canceled)
                    {
                    if (!canceling)
                    {
                        await Task.Delay(Interval).ConfigureAwait(false);

                        TaskAsyncTick.Invoke(context);
                    }
                    }
                    else
                    {
                        canceled = false;
                        break;
                    }
                }

        }
        public void StartAsync()
        {
            thread::ThreadPool.QueueUserWorkItem((x) =>
            {
                while (true)
                {

                    if (!canceled)
                    {
                        if (!canceling)
                        {
                            thread::Thread.Sleep(Interval);

                    Application.Current.Dispatcher.Invoke(AsyncTick);
                        }
                    }
                    else
                    {
                        canceled = false;
                        break;
                    }
                }
            });
        }

        public void StartAsync(thread::SynchronizationContext context)
        {
            thread::ThreadPool.QueueUserWorkItem((x) =>
            {
                while(true)
                 {

                    if (!canceled)
                    {
                        if (!canceling)
                        {
                            thread::Thread.Sleep(Interval);
                            context.Post((xfail) => { AsyncTick.Invoke(); }, null);
                        }
                    }
                    else
                    {
                        canceled = false;
                        break;
                    }
                }
            });
        }
        public void Abort()
        {
            canceled = true;
        }
    }


     }

If you want to execute a local script remotely without saving that script remotely you can do it like this:

cat local_script.sh | ssh user@remotehost 'bash -'

It works like a charm for me.

I do that even from Windows to Linux given that you have MSYS installed on your Windows computer.

To add exact fontsize you can use following. Worked for me since in my case predefined ranges (Large, tiny) are not match with the font size required to me.

\fontsize{10}{12}\selectfont This is the text you need to be in 10px

More info: https://tug.org/TUGboat/tb33-3/tb105thurnherr.pdf

This will do:

▢

It is ?
(known as a "WHITE SQUARE WITH ROUNDED CORNERS" on fileformat.info)

Or

◻

as ?
(known as a "WHITE MEDIUM SQUARE" on the same website)

Two with shadow:

❏
❑

as ? and ? . The difference between them is the shadows' shape. You can see it if you zoom in or if you print it out. (They are known as "LOWER RIGHT DROP-SHADOWED WHITE SQUARE" and "LOWER RIGHT SHADOWED WHITE SQUARE", respectively).

You can also use

☐

which is ?
(known as a "BALLOT BOX").

A sample is at http://jsfiddle.net/S2QCt/267/

(a note: on the Mac, ▢ is quite nice, because it is bigger and somewhat more elegant than ☐ On Windows, ☐ looks more standard, while ▢ is somewhat small.)

Angular-UI's project includes a ui-validate directive, which will probably help you with this. It let's you specify a function to call to do the validation.

Have a look at the demo page: http://angular-ui.github.com/, search down to the Validate heading.

From the demo page:

<input ng-model="email" ui-validate='{blacklist : notBlackListed}'>
<span ng-show='form.email.$error.blacklist'>This e-mail is black-listed!</span>

then in your controller:

function ValidateCtrl($scope) {
  $scope.blackList = ['[email protected]','[email protected]'];
  $scope.notBlackListed = function(value) {
    return $scope.blackList.indexOf(value) === -1;
  };
}

On Debian Unstable/Sid,

docker info to find system-wide information.

images are stored at /var/lib/docker/image/overlay2/imagedb/content and

containers are stored at /var/lib/docker/containers

docker version 18.06.0-ce, API version 1.38

This is fairly straightforward. In your JS, all you would do is this or something similar:

var array = ["thing1", "thing2", "thing3"];

var parameters = {
  "array1[]": array,
  ...
};

$.post(
  'your/page.php',
  parameters
)
.done(function(data, statusText) {
    // This block is optional, fires when the ajax call is complete
});

In your php page, the values in array form will be available via $_POST['array1'].

references

• jQuery post()
• jQuery ajax()

Python's print function adds a newline character to its input. If you give it no input it will just print a newline character

print()

Will print an empty line. If you want to have an extra line after some text you're printing, you can a newline to your text

my_str = "hello world"
print(my_str + "\n")

If you're doing this a lot, you can also tell print to add 2 newlines instead of just one by changing the end= parameter (by default end="\n")

print("hello world", end="\n\n")

But you probably don't need this last method, the two before are much clearer.

There are some differences in calling conventions in C++ and Java. In C++ there are technically speaking only two conventions: pass-by-value and pass-by-reference, with some literature including a third pass-by-pointer convention (that is actually pass-by-value of a pointer type). On top of that, you can add const-ness to the type of the argument, enhancing the semantics.

Pass by reference

Passing by reference means that the function will conceptually receive your object instance and not a copy of it. The reference is conceptually an alias to the object that was used in the calling context, and cannot be null. All operations performed inside the function apply to the object outside the function. This convention is not available in Java or C.

Pass by value (and pass-by-pointer)

The compiler will generate a copy of the object in the calling context and use that copy inside the function. All operations performed inside the function are done to the copy, not the external element. This is the convention for primitive types in Java.

An special version of it is passing a pointer (address-of the object) into a function. The function receives the pointer, and any and all operations applied to the pointer itself are applied to the copy (pointer), on the other hand, operations applied to the dereferenced pointer will apply to the object instance at that memory location, so the function can have side effects. The effect of using pass-by-value of a pointer to the object will allow the internal function to modify external values, as with pass-by-reference and will also allow for optional values (pass a null pointer).

This is the convention used in C when a function needs to modify an external variable, and the convention used in Java with reference types: the reference is copied, but the referred object is the same: changes to the reference/pointer are not visible outside the function, but changes to the pointed memory are.

Adding const to the equation

In C++ you can assign constant-ness to objects when defining variables, pointers and references at different levels. You can declare a variable to be constant, you can declare a reference to a constant instance, and you can define all pointers to constant objects, constant pointers to mutable objects and constant pointers to constant elements. Conversely in Java you can only define one level of constant-ness (final keyword): that of the variable (instance for primitive types, reference for reference types), but you cannot define a reference to an immutable element (unless the class itself is immutable).

This is extensively used in C++ calling conventions. When the objects are small you can pass the object by value. The compiler will generate a copy, but that copy is not an expensive operation. For any other type, if the function will not change the object, you can pass a reference to a constant instance (usually called constant reference) of the type. This will not copy the object, but pass it into the function. But at the same time the compiler will guarantee that the object is not changed inside the function.

Rules of thumb

This are some basic rules to follow:

• Prefer pass-by-value for primitive types
• Prefer pass-by-reference with references to constant for other types
• If the function needs to modify the argument use pass-by-reference
• If the argument is optional, use pass-by-pointer (to constant if the optional value should not be modified)

There are other small deviations from these rules, the first of which is handling ownership of an object. When an object is dynamically allocated with new, it must be deallocated with delete (or the [] versions thereof). The object or function that is responsible for the destruction of the object is considered the owner of the resource. When a dynamically allocated object is created in a piece of code, but the ownership is transfered to a different element it is usually done with pass-by-pointer semantics, or if possible with smart pointers.

Side note

It is important to insist in the importance of the difference between C++ and Java references. In C++ references are conceptually the instance of the object, not an accessor to it. The simplest example is implementing a swap function:

// C++
class Type; // defined somewhere before, with the appropriate operations
void swap( Type & a, Type & b ) {
   Type tmp = a;
   a = b;
   b = tmp;
}
int main() {
   Type a, b;
   Type old_a = a, old_b = b;
   swap( a, b );
   assert( a == old_b );
   assert( b == old_a ); 
}

The swap function above changes both its arguments through the use of references. The closest code in Java:

public class C {
   // ...
   public static void swap( C a, C b ) {
      C tmp = a;
      a = b;
      b = tmp;
   }
   public static void main( String args[] ) {
      C a = new C();
      C b = new C();
      C old_a = a;
      C old_b = b;
      swap( a, b ); 
      // a and b remain unchanged a==old_a, and b==old_b
   }
}

The Java version of the code will modify the copies of the references internally, but will not modify the actual objects externally. Java references are C pointers without pointer arithmetic that get passed by value into functions.

Simply specify whether you want the time to be greater, smaller, or equal to the time you want, using, respectively:

find . -cmin +<time>
find . -cmin -<time>
find . -cmin  <time>

In your case, for example, the files with last edition in a maximum of 5 minutes, are given by:

find . -cmin -5

You can use values_list alongside filter like so;

active_emps_first_name = Employees.objects.filter(active=True).values_list('first_name',flat=True)

More details here

If you like the pipe mode, this is the most clean solution:

tar c some-dir | xz > some-dir.tar.xz

It's not necessary to put the f option in order to deal with files and then to use - to specify that the file is the standard input. It's also not necessary to specify the -z option for xz, because it's default.

It works with gzip and bzip2 too:

tar c some-dir | gzip > some-dir.tar.gz

or

tar c some-dir | bzip2 > some-dir.tar.bz2

Decompressing is also quite straightforward:

xzcat tarball.tar.xz | tar x
bzcat tarball.tar.bz2 | tar x
zcat tarball.tar.gz | tar x

If you have only tar archive, you can use cat:

cat archive.tar | tar x

If you need to list the files only, use tar t.

I have used this:

document.onkeydown = keyboardDown;
document.onkeyup = keyboardUp;
document.oncontextmenu = function(e){
 var evt = new Object({keyCode:93});
 stopEvent(e);
 keyboardUp(evt);
}
function stopEvent(event){
 if(event.preventDefault != undefined)
  event.preventDefault();
 if(event.stopPropagation != undefined)
  event.stopPropagation();
}
function keyboardDown(e){
 ...
}
function keyboardUp(e){
 ...
}

Then I catch e.keyCode property in those two last functions - if e.keyCode == 93, I know that the user either released the right mouse button or pressed/released the Context Menu key.

Hope it helps.

You could use a library like jQuery and its $.post method.

Since variable names in the BASH shell cannot contain a dot or space it is better to use an associative array in BASH like this:

#!/bin/bash

# declare an associative array
declare -A arr

# read file line by line and populate the array. Field separator is "="
while IFS='=' read -r k v; do
   arr["$k"]="$v"
done < app.properties

Testing:

Use declare -p to show the result:

  > declare -p arr  

        declare -A arr='([db.uat.passwd]="secret" [db.uat.user]="saple user" )'

As a function:

def multi_delete(list_, *args):
    indexes = sorted(list(args), reverse=True)
    for index in indexes:
        del list_[index]
    return list_

Runs in n log(n) time, which should make it the fastest correct solution yet.

For beginners, the accepted answer is correct, but a little terse if you're not that familiar with either VSC or Regex.

So, in case this is your first contact with either:

To find and modify text,

1. In the "Find" step, you can use regex with "capturing groups," e.g. I want to find (group1) and (group2), using parentheses. This would find the same text as I want to find group1 and group2, but with the difference that you can then reference group1 and group2 in the next step:

2. In the "Replace" step, you can refer to the capturing groups via $1, $2 etc, so you could change the sentence to I found $1 and $2 having a picnic, which would output I found group1 and group2 having a picnic.

Notes:

• Instead of just a string, anything inside or outside the () can be a regular expression.

• $0 refers to the whole match

The DECLARE GLOBAL TEMPORARY TABLE statement defines a temporary table for the current connection.

These tables do not reside in the system catalogs and are not persistent.

Temporary tables exist only during the connection that declared them and cannot be referenced outside of that connection.

When the connection closes, the rows of the table are deleted, and the in-memory description of the temporary table is dropped.

For your reference http://docs.oracle.com/javadb/10.6.2.1/ref/rrefdeclaretemptable.html

First off, are you setting your desired JRE or your desired JDK?

Even if your Eclipse is set up properly, there might be a wacky project-specific setting somewhere. You can open up a context menu on a given Java project in the Project Explorer and select Properties > Java Compiler to check on that.

If none of that helps, leave a comment and I'll take another look.

This can be more complicated than it looks depending on how you want to count things. For instance, if you have a list of ints, do you want the size of the list containing the references to the ints? (ie. list only, not what is contained in it), or do you want to include the actual data pointed to, in which case you need to deal with duplicate references, and how to prevent double-counting when two objects contain references to the same object.

You may want to take a look at one of the python memory profilers, such as pysizer to see if they meet your needs.

Flutter 1.2 - dart 2.2

According with the official guidelines and sources if you want to be certain that also the last frame of your layout was drawned you can write for example:

import 'package:flutter/scheduler.dart';

void initState() {
   super.initState();
   if (SchedulerBinding.instance.schedulerPhase == SchedulerPhase.persistentCallbacks) {
        SchedulerBinding.instance.addPostFrameCallback((_) => yourFunction(context));
   }
}

These two steps worked for me

1) Uninstalled react-app globally with this command

npm uninstall -g create-react-app

2) Installed react-app in project folder with this command

npx create-react-app project-name

If it's not a big/long array just mirror it:

for( int i = 0; i < arr.length/2; ++i ) 
{ 
  temp = arr[i]; 
  arr[i] = arr[arr.length - i - 1]; 
  arr[arr.length - i - 1] = temp; 
}

Here is another way to get the last related record using GROUP_CONCAT with order by and SUBSTRING_INDEX to pick one of the record from the list

SELECT 
  `Id`,
  `Name`,
  SUBSTRING_INDEX(
    GROUP_CONCAT(
      `Other_Columns` 
      ORDER BY `Id` DESC 
      SEPARATOR '||'
    ),
    '||',
    1
  ) Other_Columns 
FROM
  messages 
GROUP BY `Name` 

Above query will group the all the Other_Columns that are in same Name group and using ORDER BY id DESC will join all the Other_Columns in a specific group in descending order with the provided separator in my case i have used || ,using SUBSTRING_INDEX over this list will pick the first one

Fiddle Demo

.button{
    background-image:url('/image/btn.png');
    background-repeat:no-repeat;
}

Adding ?wsdl at the end and calling the method:

$client->__setLocation('url?wsdl'); 

helped to me.

For Spring Boot 2 if you don't want to use global CORS configuration, you can do it by method or class/controller level using @CrossOrigin adnotation with exposedHeaders atribute.

For example, to add header authorization for YourController methods:

@CrossOrigin(exposedHeaders = "authorization")
@RestController
public class YourController {
    ...
}

The problem happened because I was trying to bind a HTML element before it was created.

My script was loaded on top of the HTML and it needs to be loaded at the bottom of my HTML code.

Unlike standard arithmetic, which desires matching dimensions, dot products require that the dimensions are one of:

• (X..., A, B) dot (Y..., B, C) -> (X..., Y..., A, C), where ... means "0 or more different values
• (B,) dot (B, C) -> (C,)
• (A, B) dot (B,) -> (A,)
• (B,) dot (B,) -> ()

Your problem is that you are using np.matrix, which is totally unnecessary in your code - the main purpose of np.matrix is to translate a * b into np.dot(a, b). As a general rule, np.matrix is probably not a good choice.

This can be done by using PsExec which can be downloaded here

psexec \\computer_name -u username -p password ipconfig

If this isn't working try doing this :-

1. Open RegEdit on your remote server.

2. Navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System.

3. Add a new DWORD value called LocalAccountTokenFilterPolicy

4. Set its value to 1.
5. Reboot your remote server.
6. Try running PSExec again from your local server.

Ross, you can use Arrays.copyof() or Arrays.copyOfRange() too.

Integer[] integerArray = Arrays.copyOf(a, a.length, Integer[].class);
Integer[] integerArray = Arrays.copyOfRange(a, 0, a.length, Integer[].class);

Here the reason to hitting an ClassCastException is you can't treat an array of Integer as an array of Object. Integer[] is a subtype of Object[] but Object[] is not a Integer[].

And the following also will not give an ClassCastException.

Object[] a = new Integer[1];
Integer b=1;
a[0]=b;
Integer[] c = (Integer[]) a;

A small note on try/finally: The finally will always execute unless

• System.exit() is called.
• The JVM crashes.
• The try{} block never ends (e.g. endless loop).

If you're inside an iframe that don't have cross domain src, or src is empty:

Then:

function getOriginUrl() {
    var href = document.location.href;
    var referrer = document.referrer;
    // Check if window.frameElement not null
    if(window.frameElement) {
        href = window.frameElement.ownerDocument.location.href;
        // This one will be origin
        if(window.frameElement.ownerDocument.referrer != "") {
            referrer = window.frameElement.ownerDocument.referrer;
        }
    }
    // Compare if href not equal to referrer
    if(href != referrer) {
        // Take referrer as origin
        return referrer;
    } else {
        // Take href
        return href
    }
}

If you're inside an iframe with cross domain src:

Then:

function getOriginUrl() {
    var href = document.location.href;
    var referrer = document.referrer;
    // Detect if you're inside an iframe
    if(window.parent != window) {
        // Take referrer as origin
        return referrer;
    } else {
        // Take href
        return href;
    }
}

To map a composite key, you can use the EmbeddedId or the IdClass annotations. I know this question is not strictly about JPA but the rules defined by the specification also applies. So here they are:

2.1.4 Primary Keys and Entity Identity

...

A composite primary key must correspond to either a single persistent field or property or to a set of such fields or properties as described below. A primary key class must be defined to represent a composite primary key. Composite primary keys typically arise when mapping from legacy databases when the database key is comprised of several columns. The EmbeddedId and IdClass annotations are used to denote composite primary keys. See sections 9.1.14 and 9.1.15.

...

The following rules apply for composite primary keys:

• The primary key class must be public and must have a public no-arg constructor.
• If property-based access is used, the properties of the primary key class must be public or protected.
• The primary key class must be serializable.
• The primary key class must define equals and hashCode methods. The semantics of value equality for these methods must be consistent with the database equality for the database types to which the key is mapped.
• A composite primary key must either be represented and mapped as an embeddable class (see Section 9.1.14, “EmbeddedId Annotation”) or must be represented and mapped to multiple fields or properties of the entity class (see Section 9.1.15, “IdClass Annotation”).
• If the composite primary key class is mapped to multiple fields or properties of the entity class, the names of primary key fields or properties in the primary key class and those of the entity class must correspond and their types must be the same.

With an IdClass

The class for the composite primary key could look like (could be a static inner class):

public class TimePK implements Serializable {
    protected Integer levelStation;
    protected Integer confPathID;

    public TimePK() {}

    public TimePK(Integer levelStation, Integer confPathID) {
        this.levelStation = levelStation;
        this.confPathID = confPathID;
    }
    // equals, hashCode
}

And the entity:

@Entity
@IdClass(TimePK.class)
class Time implements Serializable {
    @Id
    private Integer levelStation;
    @Id
    private Integer confPathID;

    private String src;
    private String dst;
    private Integer distance;
    private Integer price;

    // getters, setters
}

The IdClass annotation maps multiple fields to the table PK.

With EmbeddedId

The class for the composite primary key could look like (could be a static inner class):

@Embeddable
public class TimePK implements Serializable {
    protected Integer levelStation;
    protected Integer confPathID;

    public TimePK() {}

    public TimePK(Integer levelStation, Integer confPathID) {
        this.levelStation = levelStation;
        this.confPathID = confPathID;
    }
    // equals, hashCode
}

And the entity:

@Entity
class Time implements Serializable {
    @EmbeddedId
    private TimePK timePK;

    private String src;
    private String dst;
    private Integer distance;
    private Integer price;

    //...
}

The @EmbeddedId annotation maps a PK class to table PK.

Differences:

• From the physical model point of view, there are no differences
• @EmbeddedId somehow communicates more clearly that the key is a composite key and IMO makes sense when the combined pk is either a meaningful entity itself or it reused in your code.
• @IdClass is useful to specify that some combination of fields is unique but these do not have a special meaning.

They also affect the way you write queries (making them more or less verbose):

• with IdClass

  select t.levelStation from Time t
  

• with EmbeddedId

  select t.timePK.levelStation from Time t
  

References

• JPA 1.0 specification
  • Section 2.1.4 "Primary Keys and Entity Identity"
  • Section 9.1.14 "EmbeddedId Annotation"
  • Section 9.1.15 "IdClass Annotation"

create procedure usp_find_string(@string as varchar(1000))
as
begin
declare @mincounter as int
declare @maxcounter as int
declare @stmtquery as varchar(1000)
set @stmtquery=''
create table #tmp(tablename varchar(128),columnname varchar(128),rowid int identity)
create table #tablelist(tablename varchar(128),columnname varchar(128))
declare @tmp table(name varchar(128))
declare @tablename as varchar(128)
declare @columnname as varchar(128)

insert into #tmp(tablename,columnname)
select a.name,b.name as columnname from sysobjects a
inner join syscolumns b on a.name=object_name(b.id)
where a.type='u'
and b.xtype in(select xtype from systypes
    where name='text' or name='ntext' or name='varchar' or name='nvarchar' or name='char' or name='nchar')
order by a.name

select @maxcounter=max(rowid),@mincounter=min(rowid) from #tmp 
while(@mincounter <= @maxcounter )
begin
 select @tablename=tablename, @columnname=columnname from #tmp where rowid=@mincounter
 set @stmtquery ='select top 1  ' + '[' +@columnname+']' + ' from ' + '['+@tablename+']' + ' where ' + '['+@columnname+']' + ' like ' + '''%' + @string + '%'''
 insert into @tmp(name) exec(@stmtquery)
 if @@rowcount >0
 insert into #tablelist values(@tablename,@columnname)
 set @mincounter=@mincounter +1
end
select * from #tablelist
end

yes, Scrapy can scrap dynamic websites, website that are rendered through javaScript.

There are Two approaches to scrapy these kind of websites.

First,

you can use splash to render Javascript code and then parse the rendered HTML. you can find the doc and project here Scrapy splash, git

Second,

As everyone is stating, by monitoring the network calls, yes, you can find the api call that fetch the data and mock that call in your scrapy spider might help you to get desired data.

It seems that nobody actually read your question and looked at your source code. Here's the answer you all have been waiting for:

#header_content p {
    margin-top: 0;
}

jsFiddle

After reading all the answers for this topic and the (wrong) accepted one, I want to add my contribution.

IF the target is iOS7+, and in 2017 it should since XCode makes really hard to deliver compatibility under iOS8, the best way, thread safe, fast, amd will full UTF-8 support to do this is:

(Objective C code)

@implementation NSString (NSString_urlencoding)

- (NSString *)urlencode {
    static NSMutableCharacterSet *chars = nil;
    static dispatch_once_t pred;

    if (chars)
        return [self stringByAddingPercentEncodingWithAllowedCharacters:chars];

    // to be thread safe
    dispatch_once(&pred, ^{
        chars = NSCharacterSet.URLQueryAllowedCharacterSet.mutableCopy;
        [chars removeCharactersInString:@"!*'();:@&=+$,/?%#[]"];
    });
    return [self stringByAddingPercentEncodingWithAllowedCharacters:chars];
}
@end

This will extend NSString, will exclude RFC forbidden characters, support UTF-8 characters, and let you use things like:

NSString *myusername = "I'm[evil]&want(to)break!!!$->àéìòù";
NSLog(@"Source: %@ -> Dest: %@", myusername, [myusername urlencode]);

That will print on your debug console:

Source: I'm[evil]&want(to)break!!!$->àéìòù -> Dest: I%27m%5Bevil%5D%26want%28to%29break%21%21%21%24-%3E%C3%A0%C3%A9%C3%AC%C3%B2%C3%B9

... note also the use of dispatch_once to avoid multiple initializations in multithread environments.

$("#select_id").find("option:selected").text();

It is helpful if your control is on Server side. In .NET it looks like:

$('#<%= dropdownID.ClientID %>').find("option:selected").text();

vim ~/.bash

parse_git_branch() {
     git branch 2> /dev/null | sed -e '/^[^*]/d' -e 's/* \(.*\)/ (\1)/'
}

export PS1="\u@\h \[\033[32m\]\w\[\033[33m\]\$(parse_git_branch)\[\033[00m\] $"

To reflect latest changes run following command

source ~/.bashrc

Output:-

chandrakant@NDL41104 ~/Chandrakant/CodeBase/LaravelApp (development) $

When you run the code on windows machine, firewall prompts it to allow network access, allow the network access and it will work, if it does not prompts, go to firewall settings > allow an app through firewall and select your python.exe and allow network access.

Sometimes, it may help switching off AllowAutoRedirect and setting both login POST and page GET requests the same user agent.

request.UserAgent = userAgent;
request.AllowAutoRedirect = false;

Older versions of Python would only allow a single simple statement after for ...: if ...: or similar block introductory statements.

I see that one can have multiple simple statements on the same line as any of these. However, there are various combinations that don't work. For example we can:

for i in range(3): print "Here's i:"; print i

... but, on the other hand, we can't:

for i in range(3): if i % 2: print "That's odd!"

We can:

x=10
while x > 0: print x; x-=1

... but we can't:

x=10; while x > 0: print x; x-=1

... and so on.

In any event all of these are considered to be extremely NON-pythonic. If you write code like this then experience Pythonistas will probably take a dim view of your skills.

It's marginally acceptable to combine multiple statements on a line in some cases. For example:

x=0; y=1

... or even:

if some_condition(): break

... for simple break continue and even return statements or assigments.

In particular if one needs to use a series of elif one might use something like:

if     keystroke == 'q':   break
elif   keystroke == 'c':   action='continue'
elif   keystroke == 'd':   action='delete'
# ...
else:                      action='ask again'

... then you might not irk your colleagues too much. (However, chains of elif like that scream to be refactored into a dispatch table ... a dictionary that might look more like:

dispatch = {
    'q': foo.break,
    'c': foo.continue,
    'd': foo.delete
    }


# ...
while True:
    key = SomeGetKey()
    dispatch.get(key, foo.try_again)()

The code you have is a white with low opacity.

If something white with a low opacity is above something black, you end up with a lighter shade of gray. Above red? Lighter red, etc. That is how opacity works.

Here is a simple demo.

If you want it to look 'more white', make it less opaque:

background:rgba(255,255,255, 0.9);

Demo

My task was set to Run only when user is logged on and it was failing for me even while I was logged in and starting it manually. The user was set to me already. No password changes, etc.

I solved it by clicking "Change user" and selecting myself again.

I suspect it may have been caused by AD changing the user SID or something to that extent. Perhaps IT was doing some user management in AD, who knows.

You can use seismic. An example can be found here.

Installing Boost on Ubuntu with an example of using boost::array:

Install libboost-all-dev and aptitude:

sudo apt install libboost-all-dev

sudo apt install aptitude

aptitude search boost

Then paste this into a C++ file called main.cpp:

#include <iostream>
#include <boost/array.hpp>

using namespace std;
int main(){
  boost::array<int, 4> arr = {{1,2,3,4}};
  cout << "hi" << arr[0];
  return 0;
}

Compile like this:

g++ -o s main.cpp

Run it like this:

./s

Program prints:

hi1

If you don't want to have to rely on a third party tool you can use this technique:

function TestBlockHTML($replStr){
  $template = 
   '<html>
     <body>
       <h1>$str</h1>
     </body>
   </html>';
 return strtr($template, array( '$str' => $replStr));
}

Since everyone has given you jQuery/JS answers to this, I will provide an additional solution. The answer to your question is still no, but using LESS (a CSS Pre-processor) you can do this easily.

.first-class {
  background-color: yellow;
}
.second-class:hover {
  .first-class;
}

Quite simply, any time you hover over .second-class it will give it all the properties of .first-class. Note that it won't add the class permanently, just on hover. You can learn more about LESS here: Getting Started with LESS

Here is a SASS way to do it as well:

.first-class {
  background-color: yellow;
}
.second-class {
  &:hover {
    @extend .first-class;
  }
}

Polling like this is definitely the least preferred solution.

I assume that you have another thread that will do something to make the condition true. There are several ways to synchronize threads. The easiest one in your case would be a notification via an Object:

Main thread:

synchronized(syncObject) {
    try {
        // Calling wait() will block this thread until another thread
        // calls notify() on the object.
        syncObject.wait();
    } catch (InterruptedException e) {
        // Happens if someone interrupts your thread.
    }
}

Other thread:

// Do something
// If the condition is true, do the following:
synchronized(syncObject) {
    syncObject.notify();
}

syncObject itself can be a simple Object.

There are many other ways of inter-thread communication, but which one to use depends on what precisely you're doing.

I found the solution.

As said in the EDIT of my answer, a <div> is misfunctioning in a <table>. So I wrote this code instead :

<tr id="hidden" style="display:none;">
    <td class="depot_table_left">
        <label for="sexe">Sexe</label>
    </td>
    <td>
        <select type="text" name="sexe">
            <option value="1">Sexe</option>
            <option value="2">Joueur</option>
            <option value="3">Joueuse</option>
        </select>
    </td>
</tr>

And this is working fine.

Thanks everybody ;)

The reasons for warning are documented here, and the simple fixes are to turn off the warning or put the following declaration in your code to supply the version UID. The actual value is not relevant, start with 999 if you like, but changing it when you make incompatible changes to the class is.

public class HelloWorldSwing extends JFrame {

        JTextArea m_resultArea = new JTextArea(6, 30);
        private static final long serialVersionUID = 1L;

The ObjectiveC equivalent is:

    myView.translatesAutoresizingMaskIntoConstraints = NO;

    [[myView.centerXAnchor constraintEqualToAnchor:self.view.centerXAnchor] setActive:YES];

    [[myView.centerYAnchor constraintEqualToAnchor:self.view.centerYAnchor] setActive:YES];

The possibility could be, the SSH might not be enabled on your server/system.

1. Check sudo systemctl status ssh is Active or not.
2. If it's not active, try installing with the help of these commands

sudo apt update

sudo apt install openssh-server

Now try to access the server/system with following command

ssh username@ip_address

In Postman latest version(7++) may be there is no Bearer field in Authorization So go to Header tab

select key as Authorization and in value write JWT

Flutter is designed to use the latest Android version installed. So if you have an incomplete download of the latest Android, Flutter will try to use that.

So either complete the installation or delete the complete installation. You can find the Android versions at: /home/{user}/Android/Sdk/platforms/android-29/android.jar

PostgreSQL:

SELECT ... LIMIT [num] OFFSET [num];

Piping output to xargs will concatenate each line of output to a single line with spaces:

grep pattern file | xargs

Or any command, eg. ls | xargs. The default limit of xargs output is ~4096 characters, but can be increased with eg. xargs -s 8192.

grep xargs

Yes, this is possible. You don't have to be the current process owning the socket to close it. Consider for a moment that the remote machine, the network card, the network cable, and your OS can all cause the socket to close.

Consider also that Fiddler and Desktop VPN software can insert themselves into the network stack and show you all your traffic or reroute all your traffic.

So all you really need is either for Windows to provide an API that allows this directly, or for someone to have written a program that operates somewhat like a VPN or Fiddler and gives you a way to close sockets that pass through it.

There is at least one program (CurrPorts) that does exactly this and I used it today for the purpose of closing specific sockets on a process that was started before CurrPorts was started. To do this you must run it as administrator, of course.

Note that it is probably not easily possible to cause a program to not listen on a port (well, it is possible but that capability is referred to as a firewall...), but I don't think that was being asked here. I believe the question is "how do I selectively close one active connection (socket) to the port my program is listening on?". The wording of the question is a bit off because a port number for the undesired inbound client connection is given and it was referred to as "port" but it's pretty clear that it was a reference to that one socket and not the listening port.

In Python 2.7:

a = 13.949999999999999
output = float("%0.2f"%a)
print output

To subtract timevals:

gettimeofday(&t0, 0);
/* ... */
gettimeofday(&t1, 0);
long elapsed = (t1.tv_sec-t0.tv_sec)*1000000 + t1.tv_usec-t0.tv_usec;

This is assuming you'll be working with intervals shorter than ~2000 seconds, at which point the arithmetic may overflow depending on the types used. If you need to work with longer intervals just change the last line to:

long long elapsed = (t1.tv_sec-t0.tv_sec)*1000000LL + t1.tv_usec-t0.tv_usec;

Try this:

git pull origin Branch_Name

Branch_Name, the branch which you are currently on.

If you do only a git pull, it pulls all other created branch name as well.

So is the reason you are getting this:

! [new branch]      split-css  -> origin/split-css  (unable to update local ref)

You may want to try changing the environment variable "PYTHONIOENCODING" to "utf_8". I have written a page on my ordeal with this problem.

Tl;dr of the blog post:

import sys, locale, os
print(sys.stdout.encoding)
print(sys.stdout.isatty())
print(locale.getpreferredencoding())
print(sys.getfilesystemencoding())
print(os.environ["PYTHONIOENCODING"])
print(chr(246), chr(9786), chr(9787))

gives you

utf_8
False
ANSI_X3.4-1968
ascii
utf_8
ö ? ?

find . -type d > list.txt

Will list all directories and subdirectories under the current path. If you want to list all of the directories under a path other than the current one, change the . to that other path.

If you want to exclude certain directories, you can filter them out with a negative condition:

find . -type d ! -name "~snapshot" > list.txt

please set dataType config property in your ajax call and give it another try!

another point is you are using ajax call setup configuration properties as string and it is wrong as reference site

$.ajax({

    url : 'http://voicebunny.comeze.com/index.php',
    type : 'GET',
    data : {
        'numberOfWords' : 10
    },
    dataType:'json',
    success : function(data) {              
        alert('Data: '+data);
    },
    error : function(request,error)
    {
        alert("Request: "+JSON.stringify(request));
    }
});

I hope be helpful!

An easy solution that works for me with Ubuntu 14.04.

react-native run-android

The emulator (already launched) will return: Unable to download JS Bundle; start again the JS server:

react-native start

Hit Reload JS on the emulator. It worked for me. Hope it will help

I also just found out how to do this with the Excel Name Manager (Formulas > Defined Names Section > Name Manager).

You can define a variable that doesn't have to "live" within a cell and then you can use it in formulas.

you can use always:

'C:/mydir'

this works both in linux and windows. Other posibility is

'C:\\mydir'

if you have problems with some names you can also try raw string literals:

r'C:\mydir'

however best practice is to use the os.path module functions that always select the correct configuration for your OS:

os.path.join(mydir, myfile)

From python 3.4 you can also use the pathlib module. This is equivelent to the above:

pathlib.Path(mydir, myfile)

or

pathlib.Path(mydir) / myfile

Here are few methods you can try:

1. Use obfuscation and tools like ProGuard.
2. Encrypt some part of source and data.
3. Use a proprietary inbuilt checksum in the app to detect tampering.
4. Introduce code to avoid loading in a debugger, that is, let the app have the ability to detect the debugger and exit / kill the debugger.
5. Separate the authentication as an online service.
6. Use application diversity
7. Use the finger printing technique for e.g., hardware signatures of the devices from different subsystem before authenticating the device.

I have found the solution even though it might be a little difficult for some to carry out.

1st step (for python3 and linux):
pip3 install pip-autoremove
2nd step:
cd /home/usernamegoeshere/.local/bin/
3rd step:
gedit /home/usernamegoeshere/.local/lib/python3.8/site-packages/pip_autoremove.py
and change all pip(s) to pip3 4th step: ./pip-autoremove packagenamegoeshere

At least, this was what worked for me ...

This error occurs mainly when copy-pasting the code. Try editing/replacing minus(-), bracket({) symbols.

Extending the above post by Tom, if you need a class type declaration and access the singleton instance using a variable, the code below might be of help. I like this notation as the code is little self guiding.

function SingletonClass(){
    if ( arguments.callee.instance )
        return arguments.callee.instance;
    arguments.callee.instance = this;
}


SingletonClass.getInstance = function() {
    var singletonClass = new SingletonClass();
    return singletonClass;
};

To access the singleton, you would

var singleTon = SingletonClass.getInstance();

Did you mean "Complex" as in complex number with real and imaginary parts? This seems unlikely, so if not you'd have to give an example since "complex" means nothing specific in terms of the C language.

You will get a direct memory copy of the structure; whether that is what you want depends on the structure. For example if the structure contains a pointer, both copies will point to the same data. This may or may not be what you want; that is down to your program design.

To perform a 'smart' copy (or a 'deep' copy), you will need to implement a function to perform the copy. This can be very difficult to achieve if the structure itself contains pointers and structures that also contain pointers, and perhaps pointers to such structures (perhaps that's what you mean by "complex"), and it is hard to maintain. The simple solution is to use C++ and implement copy constructors and assignment operators for each structure or class, then each one becomes responsible for its own copy semantics, you can use assignment syntax, and it is more easily maintained.

A variant of script that works locale-independently. Put it in a text file with .cmd extension and run.

::: Begin set date

for /f "tokens=1-4 delims=/-. " %%i in ('date /t') do (call :set_date %%i %%j %%k %%l)
goto :end_set_date

:set_date
if "%1:~0,1%" gtr "9" shift
for /f "skip=1 tokens=2-4 delims=(-)" %%m in ('echo,^|date') do (set %%m=%1&set %%n=%2&set %%o=%3)
goto :eof

:end_set_date
::: End set date

echo day in 'DD' format is %dd%; month in 'MM' format is %mm%; year in 'YYYY' format is %yy%

The variables %dd%, %mm% and %yy% will keep the day('DD' format), the month('MM' format) and the year('YYYY' format) respectively.

Another way, say in CentOS, is:

$ yum list installed '*curl*'
Loaded plugins: aliases, changelog, fastestmirror, kabi, langpacks, priorities, tmprepo, verify,
              : versionlock
Loading support for Red Hat kernel ABI
Determining fastest mirrors
google-chrome                                                                                    3/3
152 packages excluded due to repository priority protections
Installed Packages
curl.x86_64                                        7.29.0-42.el7                                @base
libcurl.x86_64                                     7.29.0-42.el7                                @base
libcurl-devel.x86_64                               7.29.0-42.el7                                @base
python-pycurl.x86_64                               7.19.0-19.el7                                @base

When you return something from a then() callback, it's a bit magic. If you return a value, the next then() is called with that value. However, if you return something promise-like, the next then() waits on it, and is only called when that promise settles (succeeds/fails).

Source: https://web.dev/promises/#queuing-asynchronous-actions

To rename the current branch (except for detached HEAD state) you can also use this alias:

[alias]
    mvh = !sh -c 'git branch -m `git rev-parse --abbrev-ref HEAD` $1'

I don't think using JS for creating a button is good practice. What if the user's browser deactivates JavaScript ?

Plus, you can just use a checkbox and a bit of CSS to do it. And it easy to retrieve the state of your checkbox.

This is just one example, but you can style it how want.

http://jsfiddle.net/4gjZX/

HTML

<fieldset class="toggle">
  <input id="data-policy" type="checkbox" checked="checked" />
  <label for="data-policy">
  <div class="toggle-button">
    <div class="toggle-tab"></div>
  </div>
  Toggle
  </label>
</fieldset>?

CSS

.toggle label {
  color: #444;
  float: left;
  line-height: 26px;
}
.toggle .toggle-button {
  margin: 0px 10px 0px 0px;
  float: left;
  width: 70px;
  height: 26px;
  background-color: #eeeeee;
  background-image: -webkit-gradient(linear, left top, left bottom, from(#eeeeee), to(#fafafa));
  background-image: -webkit-linear-gradient(top, #eeeeee, #fafafa);
  background-image: -moz-linear-gradient(top, #eeeeee, #fafafa);
  background-image: -o-linear-gradient(top, #eeeeee, #fafafa);
  background-image: -ms-linear-gradient(top, #eeeeee, #fafafa);
  background-image: linear-gradient(top, #eeeeee, #fafafa);
  filter: progid:dximagetransform.microsoft.gradient(GradientType=0, StartColorStr='#eeeeee', EndColorStr='#fafafa');
  border-radius: 4px;
  -webkit-border-radius: 4px;
  -moz-border-radius: 4px;
  border: 1px solid #D1D1D1;
}
.toggle .toggle-button .toggle-tab {
  width: 30px;
  height: 26px;
  background-color: #fafafa;
  background-image: -webkit-gradient(linear, left top, left bottom, from(#fafafa), to(#eeeeee));
  background-image: -webkit-linear-gradient(top, #fafafa, #eeeeee);
  background-image: -moz-linear-gradient(top, #fafafa, #eeeeee);
  background-image: -o-linear-gradient(top, #fafafa, #eeeeee);
  background-image: -ms-linear-gradient(top, #fafafa, #eeeeee);
  background-image: linear-gradient(top, #fafafa, #eeeeee);
  filter: progid:dximagetransform.microsoft.gradient(GradientType=0, StartColorStr='#fafafa', EndColorStr='#eeeeee');
  border: 1px solid #CCC;
  margin-left: -1px;
  margin-top: -1px;
  border-radius: 4px;
  -webkit-border-radius: 4px;
  -moz-border-radius: 4px;
  -webkit-box-shadow: 5px 0px 4px -5px #000000, 0px 0px 0px 0px #000000;
  -moz-box-shadow: 5px 0px 4px -5px rgba(0, 0, 0, 0.3), 0px 0px 0px 0px #000000;
  box-shadow: 5px 0px 4px -5px rgba(0, 0, 0, 0.3), 0px 0px 0px 0px #000000;
}
.toggle input[type=checkbox] {
  display: none;
}
.toggle input[type=checkbox]:checked ~ label .toggle-button {
  background-color: #2d71c2;
  background-image: -webkit-gradient(linear, left top, left bottom, from(#2d71c2), to(#4ea1db));
  background-image: -webkit-linear-gradient(top, #2d71c2, #4ea1db);
  background-image: -moz-linear-gradient(top, #2d71c2, #4ea1db);
  background-image: -o-linear-gradient(top, #2d71c2, #4ea1db);
  background-image: -ms-linear-gradient(top, #2d71c2, #4ea1db);
  background-image: linear-gradient(top, #2d71c2, #4ea1db);
  filter: progid:dximagetransform.microsoft.gradient(GradientType=0, StartColorStr='#2d71c2', EndColorStr='#4ea1db');
}
.toggle input[type=checkbox]:checked ~ label .toggle-button .toggle-tab {
  margin-left: 39px;
  -webkit-box-shadow: -5px 0px 4px -5px #000000, 0px 0px 0px 0px #000000;
  -moz-box-shadow: -5px 0px 4px -5px rgba(0, 0, 0, 0.3), 0px 0px 0px 0px #000000;
  box-shadow: -5px 0px 4px -5px rgba(0, 0, 0, 0.3), 0px 0px 0px 0px #000000;
}?

Hope this helps

To capitalize, you can do the following with edit text:

To make first letter capital of every word:

android:inputType="textCapWords"

To make first letter capital of every sentence:

android:inputType="textCapSentences"

To make every letter capital:

android:inputType="textCapCharacters"

But this will only make changes to keyboard and user can change the mode to write letter in small case.

So this approach is not much appreciated if you really want the data in capitalize format, add following class first:

public class CapitalizeFirstLetter {
    public static String capitaliseName(String name) {
        String collect[] = name.split(" ");
        String returnName = "";
        for (int i = 0; i < collect.length; i++) {
            collect[i] = collect[i].trim().toLowerCase();
            if (collect[i].isEmpty() == false) {
                returnName = returnName + collect[i].substring(0, 1).toUpperCase() + collect[i].substring(1) + " ";
            }
        }
        return returnName.trim();
    }
    public static String capitaliseOnlyFirstLetter(String data)
    {
        return data.substring(0,1).toUpperCase()+data.substring(1);
    }
}

And then,

Now to capitalize every word:

CapitalizeFirstLetter.capitaliseName(name);

To capitalize only first word:

CapitalizeFirstLetter.capitaliseOnlyFirstLetter(data);

You could make it absolute and put zeros to top and bottom that is:

#fullHeightDiv {
    position: absolute;
    top: 0;
    bottom: 0;
}

Do you mean compile it to JAR? NetBeans does that automatically, just do "clean and build" and look in the "dist" subdirectory of your project. There will be the JAR with "lib" folder containing the required libraries. These JAR + lib are enough to run the application.

If you disable "Compile on save" in the project properties, then it is no longer necessary to do "clean and build", simply "build" will suffice in most cases. This will save time if you want to change just a bit of the code and rebuild the JAR. However, note that NetBeans sometimes fails to handle dependencies and binary compatibility properly, which will lead to a faulty JAR throwing "no such method" or other obscure exceptions. Therefore, if you made a lot of changes since the last full rebuild and even remotely unsure that it will still work even if some classes aren't recompiled, then you must still do a full "clean and build" in order to get a perfectly working JAR.

let content = "<center><h1>404 Not Found</h1></center>"
let result = $("<div/>").html(content).text()

content: <center><h1>404 Not Found</h1></center>,
result: "404 Not Found"

document.getElementById('txtrate' + rowCount).onchange = function () {            
       // your logic
};

This one works fine but triggers the event on click too which is not good. my system went into loop. while

$('#txtrate'+rowCount).bind('input', function() {
        //your logic
} );

works perfectly in my scenario. it only works when value is changed. instead of $ sign one can use document.getElementById too

No Need Any Jquery, Just One Line CSS

.nav-tabs li.disabled a {
    pointer-events: none;
}

As you are trying to add a string of CSS to <head> with JavaScript? injecting a string of CSS into a page it is easier to do this with the <link> element than the <style> element.

The following adds p { color: green; } rule to the page.

<link rel="stylesheet" type="text/css" href="data:text/css;charset=UTF-8,p%20%7B%20color%3A%20green%3B%20%7D" />

You can create this in JavaScript simply by URL encoding your string of CSS and adding it the HREF attribute. Much simpler than all the quirks of <style> elements or directly accessing stylesheets.

var linkElement = this.document.createElement('link');
linkElement.setAttribute('rel', 'stylesheet');
linkElement.setAttribute('type', 'text/css');
linkElement.setAttribute('href', 'data:text/css;charset=UTF-8,' + encodeURIComponent(myStringOfstyles));

This will work in IE 5.5 upwards

The solution you have marked will work but this solution requires fewer dom operations and only a single element.

Although the second option is more general, the first option is better when you have an absolute tolerance, and when you have to execute many of these comparisons. If this comparison is say for every pixel in an image, the multiplication in the second options might slow your execution to unacceptable levels of performance.

Simply put, yield from provides tail recursion for iterator functions.

The answers you got assumed static text to compare against. If you want to compare against another column (say, you're joining two tables, and want to find ones where a column from one table is part of a column from another table), you can do this

WHERE NOT (someColumn LIKE '%' || someOtherColumn || '%')

You could try this

def find(ch,string1):
    for i in range(len(string1)):
        if ch == string1[i]:
            pos.append(i)        

TL;DR

You can do this by using the --prefix flag and the --global* flag.

pje@friendbear:~/foo $ npm install bower -g --prefix ./vendor/node_modules
[email protected] /Users/pje/foo/vendor/node_modules/bower

*Even though this is a "global" installation, installed bins won't be accessible through the command line unless ~/foo/vendor/node_modules exists in PATH.

TL;DR

Every configurable attribute of npm can be set in any of six different places. In order of priority:

• Command-Line Flags: --prefix ./vendor/node_modules
• Environment Variables: NPM_CONFIG_PREFIX=./vendor/node_modules
• User Config File: $HOME/.npmrc or userconfig param
• Global Config File: $PREFIX/etc/npmrc or userconfig param
• Built-In Config File: path/to/npm/itself/npmrc
• Default Config: node_modules/npmconf/config-defs.js

By default, locally-installed packages go into ./node_modules. global ones go into the prefix config variable (/usr/local by default).

You can run npm config list to see your current config and npm config edit to change it.

PS

In general, npm's documentation is really helpful. The folders section is a good structural overview of npm and the config section answers this question.

In my case, it was caused from an incompatibility with OpenJDK 9 (which I haven't investigated).

If you don't need JDK 9, a temporary work-around would be to purge it from your machine:

sudo apt-get remove --purge openjdk-9-jdk openjdk-9-jre 
sudo apt-get remove --purge openjdk-9-jdk-headless openjdk-9-jre-headless

// Purpose: to reverse bits in an unsigned short integer 
// Input: an unsigned short integer whose bits are to be reversed
// Output: an unsigned short integer with the reversed bits of the input one
unsigned short ReverseBits( unsigned short a )
{
     // declare and initialize number of bits in the unsigned short integer
     const char num_bits = sizeof(a) * CHAR_BIT;

     // declare and initialize bitset representation of integer a
     bitset<num_bits> bitset_a(a);          

     // declare and initialize bitset representation of integer b (0000000000000000)
     bitset<num_bits> bitset_b(0);                  

     // declare and initialize bitset representation of mask (0000000000000001)
     bitset<num_bits> mask(1);          

     for ( char i = 0; i < num_bits; ++i )
     {
          bitset_b = (bitset_b << 1) | bitset_a & mask;
          bitset_a >>= 1;
     }

     return (unsigned short) bitset_b.to_ulong();
}

void PrintBits( unsigned short a )
{
     // declare and initialize bitset representation of a
     bitset<sizeof(a) * CHAR_BIT> bitset(a);

     // print out bits
     cout << bitset << endl;
}


// Testing the functionality of the code

int main ()
{
     unsigned short a = 17, b;

     cout << "Original: "; 
     PrintBits(a);

     b = ReverseBits( a );

     cout << "Reversed: ";
     PrintBits(b);
}

// Output:
Original: 0000000000010001
Reversed: 1000100000000000

Use www.zero-bugs.com/ Zero debugger, it requires C++0x support from gcc

class Foo:
    def __eq__(self,other):
        return True
foo=Foo()

print(foo==None)
# True

print(foo is None)
# False

You may find an answer with this example : errorbar_demo_features.py

"""
Demo of errorbar function with different ways of specifying error bars.

Errors can be specified as a constant value (as shown in `errorbar_demo.py`),
or as demonstrated in this example, they can be specified by an N x 1 or 2 x N,
where N is the number of data points.

N x 1:
    Error varies for each point, but the error values are symmetric (i.e. the
    lower and upper values are equal).

2 x N:
    Error varies for each point, and the lower and upper limits (in that order)
    are different (asymmetric case)

In addition, this example demonstrates how to use log scale with errorbar.
"""
import numpy as np
import matplotlib.pyplot as plt

# example data
x = np.arange(0.1, 4, 0.5)
y = np.exp(-x)
# example error bar values that vary with x-position
error = 0.1 + 0.2 * x
# error bar values w/ different -/+ errors
lower_error = 0.4 * error
upper_error = error
asymmetric_error = [lower_error, upper_error]

fig, (ax0, ax1) = plt.subplots(nrows=2, sharex=True)
ax0.errorbar(x, y, yerr=error, fmt='-o')
ax0.set_title('variable, symmetric error')

ax1.errorbar(x, y, xerr=asymmetric_error, fmt='o')
ax1.set_title('variable, asymmetric error')
ax1.set_yscale('log')
plt.show()

Which plots this:

This should work

$(function(){
     $('body').on('contextmenu', 'img', function(e){ 
         return false; 
     });
 });

Gmail servers use SMTP Authentication under SSL or TLS. I think that there is no way to use the mail() function under that circumstances, so you might want to check these alternatives:

• PEAR::Mail
• phpMailer
• Nette\Mail

They all support SMTP auth under SSL.

You'll need to enable the php_openssl extension in your php.ini.

Additional Resources:

• How to Send Email from a PHP Script Using SMTP Authentication (using PEAR::Mail)
• Send email using PHP with Gmail (using phpMailer)
• Mailing using Nette\Mail

If you are using Eclipse then the keyboard shortcut is Ctrl + Shift + / to add a group of code. To make a comment line or select the code, right click -> Source -> Add Block Comment.

To remove the block comment, Ctrl + Shift + \ or right click -> Source -> Remove Block comment.

Like this:

{% if age > 18 %}
    {% with patient as p %}
    <my html here>
    {% endwith %}
{% else %}
    {% with patient.parent as p %}
    <my html here>
    {% endwith %}
{% endif %}

If the html is too big and you don't want to repeat it, then the logic would better be placed in the view. You set this variable and pass it to the template's context:

p = (age > 18 && patient) or patient.parent

and then just use {{ p }} in the template.

To have the code within one line, try this:

startActivity(new Intent(Intent.ACTION_CALL, Uri.parse("tel:123456789")));

along with the proper manifest permission:

<uses-permission android:name="android.permission.CALL_PHONE"></uses-permission>

Hope this helps!

Here is a DLL that shows:
* Hard drive ID (unique hardware serial number written in drive's IDE electronic chip)
* Partition ID (volume serial number)
* CPU ID (unique hardware ID)
* CPU vendor
* CPU running speed
* CPU theoretic speed
* Memory Load ( Total memory used in percentage (%) )
* Total Physical ( Total physical memory in bytes )
* Avail Physical ( Physical memory left in bytes )
* Total PageFile ( Total page file in bytes )
* Available PageFile( Page file left in bytes )
* Total Virtual( Total virtual memory in bytes )
* Available Virtual ( Virtual memory left in bytes )
* Bios unique identification numberBiosDate
* Bios unique identification numberBiosVersion
* Bios unique identification numberBiosProductID
* Bios unique identification numberBiosVideo

(text grabbed from original web site)
It works with C#.

You can always do it in your UIViews - (void)didMoveToSuperview method. It will get called when added or removed from your parent (nil when removed). At that point in time just set your size to that of your parent. From that point on the autoresize mask should work properly.

on Centos 7, this will do it, for Tomcat 7 : (my tomcat install dir: opt/apache-tomcat-7.0.79)

• mkdir /var/lib/tomcat7
• cd /var/lib/tomcat7
• sudo ln -s /opt/apache-tomcat-7.0.79/conf conf
• mkdir /var/log/tomcat7
• cd /var/log/tomcat7
• sudo ln -s /opt/apache-tomcat-7.0.79/logs log

not sure the log link is necessary, the configuration is the critical one.

:

If you use the gson.JsonObject you can have something like that:

import com.google.gson.JsonObject;
import com.google.gson.JsonParser;

String jsonString = "{'test1':'value1','test2':{'id':0,'name':'testName'}}"
JsonObject jsonObject = (JsonObject) jsonParser.parse(jsonString)

Use Distinct() but keep in mind that it uses the default equality comparer to compare values, so if you want anything beyond that you need to implement your own comparer.

Please see http://msdn.microsoft.com/en-us/library/bb348436.aspx for an example.

I got its answer. Here is my code

<label for="db">Choose type</label>
<select name="dbType" id=dbType">
   <option>Choose Database Type</option>
   <option value="oracle">Oracle</option>
   <option value="mssql">MS SQL</option>
   <option value="mysql">MySQL</option>
   <option value="other">Other</option>
</select>

<div id="other" class="selectDBType" style="display:none;">
<label for="specify">Specify</label>
<input type="text" name="specify" placeholder="Specify Databse Type"/>
</div>

And my script is

$(function() {

        $('#dbType').change(function() {
            $('.selectDBType').slideUp("slow");
            $('#' + $(this).val()).slideDown("slow");
        });
    });

Try the following simple one-liners:

For all UNIX/OSX/Linux

dir=$(cd -P -- "$(dirname -- "$0")" && pwd -P)

Bash

dir=$(cd -P -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd -P)

^{Note: A double dash (--) is used in commands to signify the end of command options, so files containing dashes or other special characters won't break the command.}

^{Note: In Bash, use ${BASH_SOURCE[0]} in favor of $0, otherwise the path can break when sourcing it (source/.).}

For Linux, Mac and other *BSD:

cd "$(dirname "$(realpath "$0")")";

^{Note: realpath should be installed in the most popular Linux distribution by default (like Ubuntu), but in some it can be missing, so you have to install it.}

^{Note: If you're using Bash, use ${BASH_SOURCE[0]} in favor of $0, otherwise the path can break when sourcing it (source/.).}

Otherwise you could try something like that (it will use the first existing tool):

cd "$(dirname "$(readlink -f "$0" || realpath "$0")")"

For Linux specific:

cd "$(dirname "$(readlink -f "$0")")"

Using GNU readlink on *BSD/Mac:

cd "$(dirname "$(greadlink -f "$0")")"

Note: You need to have coreutils installed (e.g. 1. Install Homebrew, 2. brew install coreutils).

In bash

In bash you can use Parameter Expansions to achieve that, like:

cd "${0%/*}"

but it doesn't work if the script is run from the same directory.

Alternatively you can define the following function in bash:

realpath () {
  [[ $1 = /* ]] && echo "$1" || echo "$PWD/${1#./}"
}

^{This function takes 1 argument. If argument has already absolute path, print it as it is, otherwise print $PWD variable + filename argument (without ./ prefix).}

or here is the version taken from Debian .bashrc file:

function realpath()
{
    f=$@
    if [ -d "$f" ]; then
        base=""
        dir="$f"
    else
        base="/$(basename "$f")"
        dir=$(dirname "$f")
    fi
    dir=$(cd "$dir" && /bin/pwd)
    echo "$dir$base"
}

Related:

• How to detect the current directory in which I run my shell script?

• Get the source directory of a Bash script from within the script itself

• Bash script absolute path with OS X

• Reliable way for a Bash script to get the full path to itself

See also:

How can I get the behavior of GNU's readlink -f on a Mac?

For Windows users, run npm commands from the Command Prompt (cmd.exe), not Node.Js (node.exe). So your "normal shell" is cmd.exe. (I agree this message can be confusing for a Windows, Node newbie.)

By the way, the Node.js Command Prompt is actually just an easy shortcut to cmd.exe.

Below is an example screenshot for installing grunt from cmd.exe:

Your original logic for creating the matrix is indeed correct, and it even works in Swift 2. The problem is that in the print loop, you have the row and column variables reversed. If you change it to:

for row in 0...2 {
  for column in 0...2 {
    print("column: \(column) row: \(row) value:\(array[column][row])")

  }
}

you will get the correct results. Hope this helps!

I would use REGEX with .replace like this:

window.location.href = window.location.href.replace( /[\?#].*|$/, "?single" );

If the thing you want to compare is performance of file copying, then for the channel test you should do this instead:

final FileInputStream inputStream = new FileInputStream(src);
final FileOutputStream outputStream = new FileOutputStream(dest);
final FileChannel inChannel = inputStream.getChannel();
final FileChannel outChannel = outputStream.getChannel();
inChannel.transferTo(0, inChannel.size(), outChannel);
inChannel.close();
outChannel.close();
inputStream.close();
outputStream.close();

This won't be slower than buffering yourself from one channel to the other, and will potentially be massively faster. According to the Javadocs:

Many operating systems can transfer bytes directly from the filesystem cache to the target channel without actually copying them.

The best way to visualize this is to use a packet analyzer like Wireshark and follow the TCP stream. HTTP simply uses TCP to send a stream of data starting with a few lines of HTTP headers. Often this data is easy to read because it consists of HTML, CSS, or XML, but it can be any type of data that gets transfered over the internet (Executables, Images, Video, etc).

For a GET request, your computer requests a specific URL and the web server usually responds with a 200 status code and the the content of the webpage is sent directly after the HTTP response headers. This content is the same content you would see if you viewed the source of the webpage in your browser. The query string you mentioned is just part of the URL and gets included in the HTTP GET request header that your computer sends to the web server. Below is an example of an HTTP GET request to http://accel91.citrix.com:8000/OA_HTML/OALogout.jsp?menu=Y, followed by a 302 redirect response from the server. Some of the HTTP Headers are wrapped due to the size of the viewing window (these really only take one line each), and the 302 redirect includes a simple HTML webpage with a link to the redirected webpage (Most browsers will automatically redirect any 302 response to the URL listed in the Location header instead of displaying the HTML response):

For a POST request, you may still have a query string, but this is uncommon and does not have anything to do with the data that you are POSTing. Instead, the data is included directly after the HTTP headers that your browser sends to the server, similar to the 200 response that the web server uses to respond to a GET request. In the case of POSTing a simple web form this data is encoded using the same URL encoding that a query string uses, but if you are using a SOAP web service it could also be encoded using a multi-part MIME format and XML data.

For example here is what an HTTP POST to an XML based SOAP web service located at http://192.168.24.23:8090/msh looks like in Wireshark Follow TCP Stream:

You need to just replace ' with '' inside your string

SELECT colA, colB, colC
FROM tableD
WHERE colA = 'John''s Mobile'

You can also use REPLACE(@name, '''', '''''') if generating the SQL dynamically

If you want to escape inside a like statement then you need to use the ESCAPE syntax

It's also worth mentioning that you're leaving yourself open to SQL injection attacks if you don't consider it. More info at Google or: http://it.toolbox.com/wiki/index.php/How_do_I_escape_single_quotes_in_SQL_queries%3F

• I solved these problem by deleting the ADT Bundle which was showing an error.

• Then I extracted the new ADT bundle to solve these problems. After that, I just updated the Android 4.4.2(API 19) in Android SDK Manager.

• You are getting these errors because of updating the Android SDK Tools 22.6.2. Below I show the screenshot of it.

  

• Install everything as shown in the screenshot itself. Then these problems will not occur again.

If you wish to create a new schema in XE, you need to create an USER and assign its privileges. Follow these steps:

• Open the SQL*Plus Command-line

SQL> connect sys as sysdba

• Enter the password

SQL> CREATE USER myschema IDENTIFIED BY Hga&dshja;
SQL> ALTER USER myschema QUOTA unlimited ON SYSTEM;
SQL> GRANT CREATE SESSION, CONNECT, RESOURCE, DBA TO myschema;
SQL> GRANT ALL PRIVILEGES TO myschema;

Now you can connect via Oracle SQL Developer and create your tables.

In views with {{}} and/or ng-model, Angular is setting up $watch()es for you behind the scenes.

By default $watch compares by reference. If you set the third parameter to $watch to true, Angular will instead "shallow" watch the object for changes. For arrays this means comparing the array items, for object maps this means watching the properties. So this should do what you want:

$scope.$watch('myModel', function() { ... }, true);

Update: Angular v1.2 added a new method for this, `$watchCollection():

$scope.$watchCollection('myModel', function() { ... });

Note that the word "shallow" is used to describe the comparison rather than "deep" because references are not followed -- e.g., if the watched object contains a property value that is a reference to another object, that reference is not followed to compare the other object.

Highest voted answer uses Lodash _.chain function which is considered a bad practice now "Why using _.chain is a mistake."

Here is a fewliner that approaches the problem from functional programming perspective:

import tap from "lodash/fp/tap";
import flow from "lodash/fp/flow";
import groupBy from "lodash/fp/groupBy";

const map = require('lodash/fp/map').convert({ 'cap': false });

const result = flow(
      groupBy('color'),
      map((users, color) => ({color, users})),
      tap(console.log)
    )(input)

Where input is an array that you want to convert.

Starting emulator from command line with dns help

Emulator program location : /Users/{{UserName}}/Library/Android/sdk/tools

1. Check existing avd :- emulator -list-avds

2. Start emulator with dns set /Users/{{UserName}}/Library/Android/sdk/tools/emulator -avd Pixel_API_26 -dns-server 8.8.8.8

Here is my performant approach to paging when using LINQ to objects:

public static IEnumerable<IEnumerable<T>> Page<T>(this IEnumerable<T> source, int pageSize)
{
    Contract.Requires(source != null);
    Contract.Requires(pageSize > 0);
    Contract.Ensures(Contract.Result<IEnumerable<IEnumerable<T>>>() != null);

    using (var enumerator = source.GetEnumerator())
    {
        while (enumerator.MoveNext())
        {
            var currentPage = new List<T>(pageSize)
            {
                enumerator.Current
            };

            while (currentPage.Count < pageSize && enumerator.MoveNext())
            {
                currentPage.Add(enumerator.Current);
            }
            yield return new ReadOnlyCollection<T>(currentPage);
        }
    }
}

This can then be used like so:

var items = Enumerable.Range(0, 12);

foreach(var page in items.Page(3))
{
    // Do something with each page
    foreach(var item in page)
    {
        // Do something with the item in the current page       
    }
}

None of this rubbish Skip and Take which will be highly inefficient if you are interested in multiple pages.

You must use 2 parameters :

• android:ellipsize="none" : the text is not cut on textview width

• android:scrollHorizontally="false" the text wraps on as many lines as necessary

Make sure you saved the file as JavaScript. Un check 'Hide extensions for all known type' check box in Folder Options window will show you the correct file extension(Folder>>view>>Option).

So 4 years later, Microsoft has open sourced their JDBC driver on Github. I got a notification about this question today, and went and had a look, and I believe I have found the culprit here, mssql-jdbc/src/main/java/com/microsoft/sqlserver/jdbc/SQLServerStatement.java:1713.

Basically, the driver tries to understand what SQL Server sends back if it is not a definite result set. According to the comments, it goes like this:

1. Check for errors first. (ln 1669)

2. Not an error. Is it a result set? (ln 1680)

3. Not an error or a result set. Maybe a result from a T-SQL statement? That is, one of the following:

   • a positive count of the number of rows affected (from INSERT, UPDATE, or DELETE),
   • a zero indicating no rows affected, or the statement was DDL, or
   • a -1 indicating the statement succeeded, but there is no update count information available (translates to Statement.SUCCESS_NO_INFO in batch update count arrays). (ln 1706)

4. None of the above. Last chance here... Going into the parser above, we know moreResults was initially true. If we come out with moreResults false, the we hit a DONE token (either DONE (FINAL) or DONE (RPC in batch)) that indicates that the batch succeeded overall, but that there is no information on individual statements' update counts. This is similar to the last case above, except that there is no update count. That is: we have a successful result (return true), but we have no other information about it (updateCount = -1). (ln 1693)

5. Only way to get here (moreResults is still true, but no apparent results of any kind) is if the TDSParser didn't actually parse anything. That is, we are at EOF in the response. In that case, there truly are no more results. We're done. (ln 1717)

(Emphasis mine)

So you guys were right in the end. SQL simply can't tell how many rows are affected, and defaults to -1. :)

Generally speaking, people refer to an application's presentation layer as its front end, its persistence layer (database, usually) as the back end, and anything between as middle tier. This set of ideas is often referred to as 3-tier architecture. They let you separate your application into more easily comprehensible (and testable!) chunks; you can also reuse lower-tier code more easily in higher tiers.

Which code is part of which tier is somewhat subjective; graphic designers tend to think of everything that isn't presentation as the back end, database people think of everything in front of the database as the front end, and so on.

Not all applications need to be separated out this way, though. It's certainly more work to have 3 separate sub-projects than it is to just open index.php and get cracking; depending on (1) how long you expect to have to maintain the app (2) how complex you expect the app to get, you may want to forgo the complexity.

Right click on table name-->choose open table --> Go to Info Tab

and the scroll down to see create table script

From RFC 3986:

A URI can be further classified as a locator, a name, or both. The term "Uniform Resource Locator" (URL) refers to the subset of URIs that, in addition to identifying a resource, provide a means of locating the resource by describing its primary access mechanism (e.g., its network "location"). The term "Uniform Resource Name" (URN) has been used historically to refer to both URIs under the "urn" scheme [RFC2141], which are required to remain globally unique and persistent even when the resource ceases to exist or becomes unavailable, and to any other URI with the properties of a name.

So all URLs are URIs, and all URNs are URIs - but URNs and URLs are different, so you can't say that all URIs are URLs.

If you haven't already read Roger Pate's answer, I'd advise doing so as well.

here is the full program to make a POST rest call using spring's RestTemplate.

import java.util.HashMap;
import java.util.Map;

import org.springframework.http.HttpEntity;
import org.springframework.http.ResponseEntity;
import org.springframework.util.LinkedMultiValueMap;
import org.springframework.util.MultiValueMap;
import org.springframework.web.client.RestTemplate;

import com.ituple.common.dto.ServiceResponse;

   public class PostRequestMain {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        MultiValueMap<String, String> headers = new LinkedMultiValueMap<String, String>();
        Map map = new HashMap<String, String>();
        map.put("Content-Type", "application/json");

        headers.setAll(map);

        Map req_payload = new HashMap();
        req_payload.put("name", "piyush");

        HttpEntity<?> request = new HttpEntity<>(req_payload, headers);
        String url = "http://localhost:8080/xxx/xxx/";

        ResponseEntity<?> response = new RestTemplate().postForEntity(url, request, String.class);
        ServiceResponse entityResponse = (ServiceResponse) response.getBody();
        System.out.println(entityResponse.getData());
    }

}

2020 : Similar Issue

If your content is a set of buttons that you want to center on a page, then wrap them in a row and use justify-content-center.

Sample code below:

<div class="row justify-content-center">

    <button>Action A</button>
    <button>Action B</button>
    <button>Action C</button> 

</div>

To get the file name in an excel macro is:

filname = Mid(spth, InStrRev(spth, "\", Len(spth)) + 1, Len(spth))
MsgBox Mid(filname, 1, InStr(filname, ".") - 1)

I would propose a clean version based on DISTINCT ON (see docs):

SELECT DISTINCT ON (usr_id)
    time_stamp,
    lives_remaining,
    usr_id,
    trans_id
FROM lives
ORDER BY usr_id, time_stamp DESC, trans_id DESC;

I know this is an old question, but I thought I would share this little trick.

var diff = $(old_array).not(new_array).get();

diff now contains what was in old_array that is not in new_array

With the PHP date function you will get the date time of server on which the site is located. The only way to get the user time is to use JavaScript.

But I suggest you to, if your site has registration required then the best way is to ask the user while to have registration as a compulsory field. You can list various time zones in the register page and save that in the database. After this, if the user logs in to the site then you can set the default time zone for that session as per the users’ selected time zone.

You can set any specific time zone using the PHP function date_default_timezone_set. This sets the specified time zone for users.

Basically the users’ time zone is goes to the client side, so we must use JavaScript for this.

Below is the script to get users’ time zone using PHP and JavaScript.

<?php
    #http://www.php.net/manual/en/timezones.php List of Time Zones
    function showclienttime()
    {
        if(!isset($_COOKIE['GMT_bias']))
        {
?>

            <script type="text/javascript">
                var Cookies = {};
                Cookies.create = function (name, value, days) {
                    if (days) {
                        var date = new Date();
                        date.setTime(date.getTime() + (days * 24 * 60 * 60 * 1000));
                        var expires = "; expires=" + date.toGMTString();
                    }
                    else {
                        var expires = "";
                    }
                    document.cookie = name + "=" + value + expires + "; path=/";
                    this[name] = value;
                }

                var now = new Date();
                Cookies.create("GMT_bias",now.getTimezoneOffset(),1);
                window.location = "<?php echo $_SERVER['PHP_SELF'];?>";
            </script>

            <?php

        }
        else {
          $fct_clientbias = $_COOKIE['GMT_bias'];
        }

        $fct_servertimedata = gettimeofday();
        $fct_servertime = $fct_servertimedata['sec'];
        $fct_serverbias = $fct_servertimedata['minuteswest'];
        $fct_totalbias = $fct_serverbias – $fct_clientbias;
        $fct_totalbias = $fct_totalbias * 60;
        $fct_clienttimestamp = $fct_servertime + $fct_totalbias;
        $fct_time = time();
        $fct_year = strftime("%Y", $fct_clienttimestamp);
        $fct_month = strftime("%B", $fct_clienttimestamp);
        $fct_day = strftime("%d", $fct_clienttimestamp);
        $fct_hour = strftime("%I", $fct_clienttimestamp);
        $fct_minute = strftime("%M", $fct_clienttimestamp);
        $fct_second = strftime("%S", $fct_clienttimestamp);
        $fct_am_pm = strftime("%p", $fct_clienttimestamp);
        echo $fct_day.", ".$fct_month." ".$fct_year." ( ".$fct_hour.":".$fct_minute.":".$fct_second." ".$fct_am_pm." )";
    }

    showclienttime();
?>

But as per my point of view, it’s better to ask to the users if registration is mandatory in your project.

Environment variable (can access anywhere/ dynamic object) is a type of variable. They are of 2 types system environment variables and user environment variables.

System variables having a predefined type and structure. That are used for system function. Values that produced by the system are stored in the system variable. They generally indicated by using capital letters Example: HOME,PATH,USER

User environment variables are the variables that determined by the user,and are represented by using small letters.

Is the following acceptable:

$('#myTableRow').remove();

Json.NET does this...

string json = @"{""key1"":""value1"",""key2"":""value2""}";

var values = JsonConvert.DeserializeObject<Dictionary<string, string>>(json);

More examples: Serializing Collections with Json.NET

One of the latest XAMPP releases (XAMPP for Windows v5.6.11 (PHP 5.6.11) for sure, probably some earlier versions too) does not have the Control Panel with the "Svc" checkbox that allows to install Apache and MySQL as a service.

Go to your XAMPP/Apache directory instead (typically C:/xampp/apache) and run apache_installservice.bat as an administrator. There is also apache_uninstallservice.bat for uninstall.

To run MySQL as a service. Do it the same way - the location is xampp/mysql and batch files are: mysql_installservice.bat for service installation and mysql_uninstallservice.bat for removing the MySQL service.

You can check if they were installed or not by going to services manager window (press Windows + R and type: services.msc) and check if you have Apache service (I had Apache2.4) running and set to startup automatically. The MySQL service name is just: mysql.

The three dots represent the Spread Operator in ES6. It allows us to do quite a few things in Javascript:

1. Concatenate arrays

   var shooterGames = ['Call of Duty', 'Far Cry', 'Resident Evil'];
   var racingGames = ['Need For Speed', 'Gran Turismo', 'Burnout'];
   var games = [...shooterGames, ...racingGames];
   
   console.log(games)  // ['Call of Duty', 'Far Cry', 'Resident Evil',  'Need For Speed', 'Gran Turismo', 'Burnout']
   

2. Destructuring an array

     var shooterGames = ['Call of Duty', 'Far Cry', 'Resident Evil'];
     var [first, ...remaining] = shooterGames;
     console.log(first); //Call of Duty
     console.log(remaining); //['Far Cry', 'Resident Evil']
   

3. Combining two objects

   var myCrush = {
     firstname: 'Selena',
     middlename: 'Marie'
   };
   
   var lastname = 'my last name';
   
   var myWife = {
     ...myCrush,
     lastname
   }
   
   console.log(myWife); // {firstname: 'Selena',
                        //   middlename: 'Marie',
                        //   lastname: 'my last name'}
   

There's another use for the three dots which is known as Rest Parameters and it makes it possible to take all of the arguments to a function in as one array.

4. Function arguments as array

    function fun1(...params) { 
   
    }  
   

Anyway, the documentation covers all the things.

Changing menu items at runtime

Once the activity is created, the onCreateOptionsMenu() method is called only once, as described above. The system keeps and re-uses the Menu you define in this method until your activity is destroyed. If you want to change the Options Menu any time after it's first created, you must override the onPrepareOptionsMenu() method. This passes you the Menu object as it currently exists. This is useful if you'd like to remove, add, disable, or enable menu items depending on the current state of your application.

E.g.

@Override
public boolean onPrepareOptionsMenu (Menu menu) {
    if (isFinalized) {
        menu.getItem(1).setEnabled(false);
        // You can also use something like:
        // menu.findItem(R.id.example_foobar).setEnabled(false);
    }
    return true;
}

On Android 3.0 and higher, the options menu is considered to always be open when menu items are presented in the action bar. When an event occurs and you want to perform a menu update, you must call invalidateOptionsMenu() to request that the system call onPrepareOptionsMenu().

In my experience it's best to put as much code as you can into well-named modules, and only put as much code as you need to into the actual worksheet objects.

Example: Any code that uses worksheet events like Worksheet_SelectionChange or Worksheet_Calculate.

The find method returns a Cursor instance, which allows you to iterate over all matching documents.

To get the first document that matches the given criteria you need to use find_one. The result of find_one is a dictionary.

You can always use the list constructor to return a list of all the documents in the collection but bear in mind that this will load all the data in memory and may not be what you want.

You should do that if you need to reuse the cursor and have a good reason not to use rewind()

Demo using find:

>>> import pymongo
>>> conn = pymongo.MongoClient()
>>> db = conn.test #test is my database
>>> col = db.spam #Here spam is my collection
>>> cur = col.find()  
>>> cur
<pymongo.cursor.Cursor object at 0xb6d447ec>
>>> for doc in cur:
...     print(doc)  # or do something with the document
... 
{'a': 1, '_id': ObjectId('54ff30faadd8f30feb90268f'), 'b': 2}
{'a': 1, 'c': 3, '_id': ObjectId('54ff32a2add8f30feb902690'), 'b': 2}

Demo using find_one:

>>> col.find_one()
{'a': 1, '_id': ObjectId('54ff30faadd8f30feb90268f'), 'b': 2}

http://maven.apache.org/plugins/maven-shade-plugin/examples/resource-transformers.html

I ran into a similar problem using the maven-shade-plugin. I found the solution to my problems in their example page above.

Use "php -l <filename>" (that's an 'L') from the command line to output the syntax error that could be causing PHP to throw the status 500 error. It'll output something like:

PHP Parse error: syntax error, unexpected '}' in <filename> on line 18

A more explicit example, built on Damien's code (calls a test resource at http://httpbin.org/). For python3. Note that if the server redirects to another URL, uri in add_password has to contain the new root URL (it's possible to pass a list of URLs, also).

import ssl    
import urllib.parse
import urllib.request

def get_resource(uri, user, passwd=False):
    """
    Get the content of the SSL page.
    """
    uri = 'https://httpbin.org/basic-auth/user/passwd'
    user = 'user'
    passwd = 'passwd'

    context = ssl.create_default_context()
    context.check_hostname = False
    context.verify_mode = ssl.CERT_NONE

    password_mgr = urllib.request.HTTPPasswordMgrWithDefaultRealm()
    password_mgr.add_password(None, uri, user, passwd)

    auth_handler = urllib.request.HTTPBasicAuthHandler(password_mgr)

    opener = urllib.request.build_opener(auth_handler, urllib.request.HTTPSHandler(context=context))

    urllib.request.install_opener(opener)

    return urllib.request.urlopen(uri).read()

• C++11

• msvc2015u3,gcc5.4,clang3.8.0

  template <typename T, size_t S>
  inline constexpr size_t get_file_name_offset(const T (& str)[S], size_t i = S - 1)
  {
      return (str[i] == '/' || str[i] == '\\') ? i + 1 : (i > 0 ? get_file_name_offset(str, i - 1) : 0);
  }
  
  template <typename T>
  inline constexpr size_t get_file_name_offset(T (& str)[1])
  {
      return 0;
  }
  

  '

  int main()
  {
       printf("%s\n", &__FILE__[get_file_name_offset(__FILE__)]);
  }
  

Code generates a compile time offset when:

• gcc: at least gcc6.1 + -O1

• msvc: put result into constexpr variable:

    constexpr auto file = &__FILE__[get_file_name_offset(__FILE__)];
    printf("%s\n", file);
  

• clang: persists on not compile time evaluation

There is a trick to force all 3 compilers does compile time evaluation even in the debug configuration with disabled optimization:

    namespace utility {

        template <typename T, T v>
        struct const_expr_value
        {
            static constexpr const T value = v;
        };

    }

    #define UTILITY_CONST_EXPR_VALUE(exp) ::utility::const_expr_value<decltype(exp), exp>::value

    int main()
    {
         printf("%s\n", &__FILE__[UTILITY_CONST_EXPR_VALUE(get_file_name_offset(__FILE__))]);
    }

https://godbolt.org/z/u6s8j3

On Linux I add this line to my ~/.profile:

export JAVA_HOME=$(readlink -ze /usr/bin/javac | xargs -0 dirname -z | xargs -0 dirname)

If above solutions dont work, try this and it works for me:

componentWillUnmount() {
    // fix Warning: Can't perform a React state update on an unmounted component
    this.setState = (state,callback)=>{
        return;
    };
}

I stumbled over this thread searching for answer to similar case. Basically all answers are found, but it's still hard to extract the essentials from them.

Kinds of Access

Assume a class Foo probably derived from some other class(es) with probably more classes derived from it.

Then accessing

• from static method/getter of Foo
  • some probably overridden static method/getter:
    • this.method()
    • this.property
  • some probably overridden instance method/getter:
    • impossible by design
  • own non-overridden static method/getter:
    • Foo.method()
    • Foo.property
  • own non-overridden instance method/getter:
    • impossible by design
• from instance method/getter of Foo
  • some probably overridden static method/getter:
    • this.constructor.method()
    • this.constructor.property
  • some probably overridden instance method/getter:
    • this.method()
    • this.property
  • own non-overridden static method/getter:
    • Foo.method()
    • Foo.property
  • own non-overridden instance method/getter:
    • not possible by intention unless using some workaround:
      • Foo.prototype.method.call( this )
      • Object.getOwnPropertyDescriptor( Foo.prototype,"property" ).get.call(this);

Keep in mind that using this isn't working this way when using arrow functions or invoking methods/getters explicitly bound to custom value.

Background

• When in context of an instance's method or getter
  • this is referring to current instance.
  • super is basically referring to same instance, but somewhat addressing methods and getters written in context of some class current one is extending (by using the prototype of Foo's prototype).
  • definition of instance's class used on creating it is available per this.constructor.
• When in context of a static method or getter there is no "current instance" by intention and so
  • this is available to refer to the definition of current class directly.
  • super is not referring to some instance either, but to static methods and getters written in context of some class current one is extending.

Conclusion

Try this code:

class A {_x000D_
  constructor( input ) {_x000D_
    this.loose = this.constructor.getResult( input );_x000D_
    this.tight = A.getResult( input );_x000D_
    console.log( this.scaledProperty, Object.getOwnPropertyDescriptor( A.prototype, "scaledProperty" ).get.call( this ) );_x000D_
  }_x000D_
_x000D_
  get scaledProperty() {_x000D_
    return parseInt( this.loose ) * 100;_x000D_
  }_x000D_
  _x000D_
  static getResult( input ) {_x000D_
    return input * this.scale;_x000D_
  }_x000D_
  _x000D_
  static get scale() {_x000D_
    return 2;_x000D_
  }_x000D_
}_x000D_
_x000D_
class B extends A {_x000D_
  constructor( input ) {_x000D_
    super( input );_x000D_
    this.tight = B.getResult( input ) + " (of B)";_x000D_
  }_x000D_
  _x000D_
  get scaledProperty() {_x000D_
    return parseInt( this.loose ) * 10000;_x000D_
  }_x000D_
_x000D_
  static get scale() {_x000D_
    return 4;_x000D_
  }_x000D_
}_x000D_
_x000D_
class C extends B {_x000D_
  constructor( input ) {_x000D_
    super( input );_x000D_
  }_x000D_
  _x000D_
  static get scale() {_x000D_
    return 5;_x000D_
  }_x000D_
}_x000D_
_x000D_
class D extends C {_x000D_
  constructor( input ) {_x000D_
    super( input );_x000D_
  }_x000D_
  _x000D_
  static getResult( input ) {_x000D_
    return super.getResult( input ) + " (overridden)";_x000D_
  }_x000D_
  _x000D_
  static get scale() {_x000D_
    return 10;_x000D_
  }_x000D_
}_x000D_
_x000D_
_x000D_
let instanceA = new A( 4 );_x000D_
console.log( "A.loose", instanceA.loose );_x000D_
console.log( "A.tight", instanceA.tight );_x000D_
_x000D_
let instanceB = new B( 4 );_x000D_
console.log( "B.loose", instanceB.loose );_x000D_
console.log( "B.tight", instanceB.tight );_x000D_
_x000D_
let instanceC = new C( 4 );_x000D_
console.log( "C.loose", instanceC.loose );_x000D_
console.log( "C.tight", instanceC.tight );_x000D_
_x000D_
let instanceD = new D( 4 );_x000D_
console.log( "D.loose", instanceD.loose );_x000D_
console.log( "D.tight", instanceD.tight );

Here's a workaround.

Make a template subclass B of A. Do the template-argument-independent part of the construction in A's constructor. Do the template-argument-dependent part in B's constructor.

In Laravel 6, by default the logs are in:

storage/logs/laravel.log

You can try using AppDomain.UnhandledException and see if that lets you catch it.

**EDIT*

Here is some more information that might be useful (it's a long read).

In objectMapper we have writeValueAsString() which accepts object as parameter. We can pass object list as parameter get the string back.

List<Apartment> aptList =  new ArrayList<Apartment>();
    Apartment aptmt = null;
    for(int i=0;i<5;i++){
         aptmt= new Apartment();
         aptmt.setAptName("Apartment Name : ArrowHead Ranch");
         aptmt.setAptNum("3153"+i);
         aptmt.setPhase((i+1));
         aptmt.setFloorLevel(i+2);
         aptList.add(aptmt);
    }
mapper.writeValueAsString(aptList)

An example, available for POSIX compliant systems :

/*
 * This program displays the names of all files in the current directory.
 */

#include <dirent.h> 
#include <stdio.h> 

int main(void) {
  DIR *d;
  struct dirent *dir;
  d = opendir(".");
  if (d) {
    while ((dir = readdir(d)) != NULL) {
      printf("%s\n", dir->d_name);
    }
    closedir(d);
  }
  return(0);
}

Beware that such an operation is platform dependant in C.

Source : http://faq.cprogramming.com/cgi-bin/smartfaq.cgi?answer=1046380353&id=1044780608

There is a pseudocolumn called %%physloc%% that shows the physical address of the row.

See Equivalent of Oracle's RowID in SQL Server

I don't believe there is a direct supported way. However, if you are desparate, then under navigation options, select to show system objects. Then in your table list, system tables will appear. Two tables are of interest here: MSysIMEXspecs and MSysIMEXColumns. You'll be able edit import and export information. Good luck!

Add line break to ::after or ::before pseudo-element content

.yourclass:before {
    content: 'text here first \A  text here second';
    white-space: pre;
}

Another online XML Schema (XSD) validator: http://www.utilities-online.info/xsdvalidation/.

1. for var index = self.indexOfObject(object); index != NSNotFound; index = self.indexOfObject(object) is for loop in C-style and has been removed

2. Change your code to something like this to remove all similar object if it have looped:

   let indexes = arrContacts.enumerated().filter { $0.element == contacts[indexPath.row] }.map{ $0.offset }
   for index in indexes.reversed() {
      arrContacts.remove(at: index)
   }
   

I'm using 4 break points but as ralph.m said each site is unique. You should experiment. There are no magic breakpoints due to so many devices, screens, and resolutions.

Here is what I use as a template. I'm checking the website for each breakpoint on different mobile devices and updating CSS for each element (ul, div, etc.) not displaying correctly for that breakpoint.

So far that was working on multiple responsive websites I've made.

/* SMARTPHONES PORTRAIT */
@media only screen and (min-width: 300px) {


}

/* SMARTPHONES LANDSCAPE */
@media only screen and (min-width: 480px) {


}

/* TABLETS PORTRAIT */
@media only screen and (min-width: 768px) {


}


/* TABLET LANDSCAPE / DESKTOP */
@media only screen and (min-width: 1024px) {


}    

UPDATE

As per September 2015, I'm using a better one. I find out that these media queries breakpoints match many more devices and desktop screen resolutions.

Having all CSS for desktop on style.css

All media queries on responsive.css: all CSS for responsive menu + media break points

@media only screen and (min-width: 320px) and (max-width: 479px){ ... }

@media only screen and (min-width: 480px) and (max-width: 767px){ ... }

@media only screen and (min-width: 768px) and (max-width: 991px){ ... }

@media only screen and (min-width: 992px){ ... }

Update 2019: As per Hugo comment below, I removed max-width 1999px because of the new very wide screens.

Console UI - Tig

Installation:

apt-get install tig

Usage

While inside a git repo, type 'tig', to view an interactive log, hit 'enter' on any log to see more information about it. h for help, which lists the basic functionality.

Trivia

"Tig" is "Git" backwards.