Order of magnitude: zero.

In other words, you won't see your throughput cut in half, or anything like it, when you add TLS. Answers to the "duplicate" question focus heavily on application performance, and how that compares to SSL overhead. This question specifically excludes application processing, and seeks to compare non-SSL to SSL only. While it makes sense to take a global view of performance when optimizing, that is not what this question is asking.

The main overhead of SSL is the handshake. That's where the expensive asymmetric cryptography happens. After negotiation, relatively efficient symmetric ciphers are used. That's why it can be very helpful to enable SSL sessions for your HTTPS service, where many connections are made. For a long-lived connection, this "end-effect" isn't as significant, and sessions aren't as useful.

Here's an interesting anecdote. When Google switched Gmail to use HTTPS, no additional resources were required; no network hardware, no new hosts. It only increased CPU load by about 1%.

Try it:

css code:

.list1 tr:hover td {
    background-color:#fefefe;
}

Just in case somebody else stumbles across this problem, I inherited an older CodeIgniter project and had a lot of trouble getting it to install.

I wasted a ton of time trying to create a local installation of the site and tried everything. In the end, the solution was simple.

The problem is that older CodeIgniter versions (like 1.7 and below), don't work with PHP 5.3. The solution is to switch to PHP 5.2 or something older.

$('#loginBtn').click(function(e) {
    e.preventDefault(); /// it should not have this code or else it wont continue
    //....
});

• Go to ezwinports, https://sourceforge.net/projects/ezwinports/files/

• Download make-4.2.1-without-guile-w32-bin.zip (get the version without guile)

• Extract zip
• Copy the contents to C:\ProgramFiles\Git\mingw64\ merging the folders, but do NOT overwrite/replace any exisiting files.

Actually this error occurs when server makes connection but can't build due to failure in identifying connection function identifier. This problem can be solved by typing connection function in code. For this I take a simple example. In this case function is con your may be different.

SqlCommand cmd = new SqlCommand("insert into ptb(pword,rpword) values(@a,@b)",con);

You do not have to reference std::cout or std::endl explicitly.
They are both included in the namespace std. using namespace std instead of using scope resolution operator :: every time makes is easier and cleaner.

#include<iostream>
#include<string>
using namespace std;

TypeError: Cannot read property 'then' of undefined when calling a Django service using AngularJS.

If you are calling a Python service, the code will look like below:

this.updateTalentSupplier=function(supplierObj){
  var promise = $http({
    method: 'POST',
      url: bbConfig.BWS+'updateTalentSupplier/',
      data:supplierObj,
      withCredentials: false,
      contentType:'application/json',
      dataType:'json'
    });
    return promise; //Promise is returned 
}

We are using MongoDB as the database(I know it doesn't matter. But if someone is searching with MongoDB + Python (Django) + AngularJS the result should come.

@MykolaGolubyev has already given wonderful explanation. I was looking for a solution to do somthing like this MyClass obj ( MyAnotherClass() ) but the compiler was interpreting it as a function declaration.

C++11 has braced-init-list. Using this we can do something like this

Temp t{String()};

However, this:

Temp t(String());

throws compilation error as it considers t as of type Temp(String (*)()).

#include <iostream>

class String {
public:
    String(const char* str): ptr(str)
    {
        std::cout << "Constructor: " << str << std::endl;
    }
    String(void): ptr(nullptr)
    {
        std::cout << "Constructor" << std::endl;
    }
    virtual ~String(void)
    {
        std::cout << "Destructor" << std::endl;
    }

private:
    const char *ptr;
};

class Temp {
public:
    Temp(String in): str(in)
    {
        std::cout << "Temp Constructor" << std::endl;
    }

    Temp(): str(String("hello"))
    {
        std::cout << "Temp Constructor: 2" << std::endl;
    }
    virtual ~Temp(void)
    {
        std::cout << "Temp Destructor" << std::endl;
    }

    virtual String get_str()
    {
        return str;
    }

private:
    String str;
};

int main(void)
{
    Temp t{String()}; // Compiles Success!
    // Temp t(String()); // Doesn't compile. Considers "t" as of type: Temp(String (*)())
    t.get_str(); // dummy statement just to check if we are able to access the member
    return 0;
}

Correct way to remove install plug-in from Eclipse/STS :

Go to install folder of eclipse ----> plugin --> select required plugin and remove it.

Ex-

Step 1. 
E:\springsource\sts-3.4.0.RELEASE\plugins

Step 2. 
select and remove related plugins jars.

Sounds like a perfect job for grep or perhaps ack

Or this wonderful construction:

find . -type f \( -name *.php -o -name *.html -o -name *.js \) -exec grep "document.cookie\|setcookie" /dev/null {} \;

docker export -o <nameOfContainer>.tar <nameOfContainer>

Might need to prune the existing container using docker prune ...

Import with required modifications:

cat <nameOfContainer>.tar | docker import -c "ENTRYPOINT service mysql start && /bin/bash" - <nameOfContainer>

Run the container for example with always restart option to make sure it will auto resume after host/daemon recycle:

docker run -d -t -i --restart always --name <nameOfContainer> <nameOfContainer> /bin/bash

Side note: In my opinion reasonable is to start only cron service leaving container as clean as possible then just modify crontab or cron.hourly, .daily etc... with corresponding checkup/monitoring scripts. Reason is You rely only on one daemon and in case of changes it is easier with ansible or puppet to redistribute cron scripts instead of track services that start at boot.

import extname in order to return the extension the file:

import { extname } from 'path';
extname(file.originalname);

where file is the file 'name' of form

You should add following lines while creating a project. It will always ignore .DS_Store to be pushed to the repository.

*.DS_Store this will ignore .DS_Store while code commit.
git rm --cached .DS_Store this is to remove .DS_Store files from your repository, in case you need it, you can uncomment it.

## ignore .DS_Store file.
# git rm --cached .DS_Store
*.DS_Store

<p>
    @Html.ActionLink("Create New", "Create")
</p>
@using (Html.BeginForm("Index", "Company", FormMethod.Get))
{
    <p>
        Find by Name: @Html.TextBox("SearchString", ViewBag.CurrentFilter as string)
        <input type="submit" value="Search" />
        <input type="button" value="Clear" onclick="location.href='@Url.Action("Index","Company")'"/>
    </p>
}

In the above example you can see that If I specifically need a button to do some action, I have to do it with @Url.Action whereas if I just want a link I will use @Html.ActionLink. The point is when you have to use some element(HTML) with action url is used.

Summary of answers and other data: (please add yours)

Do:

• Whenever you are referring to an exact moment in time, persist the time according to a unified standard that is not affected by daylight savings. (GMT and UTC are equivalent with this regard, but it is preferred to use the term UTC. Notice that UTC is also known as Zulu or Z time.)
• If instead you choose to persist a time using a local time value, include the local time offset for this particular time from UTC (this offset may change throughout the year), such that the timestamp can later be interpreted unambiguously.
• In some cases, you may need to store both the UTC time and the equivalent local time. Often this is done with two separate fields, but some platforms support a datetimeoffset type that can store both in a single field.
• When storing timestamps as a numeric value, use Unix time - which is the number of whole seconds since 1970-01-01T00:00:00Z (excluding leap seconds). If you require higher precision, use milliseconds instead. This value should always be based on UTC, without any time zone adjustment.
• If you might later need to modify the timestamp, include the original time zone ID so you can determine if the offset may have changed from the original value recorded.
• When scheduling future events, usually local time is preferred instead of UTC, as it is common for the offset to change. See answer, and blog post.
• When storing whole dates, such as birthdays and anniversaries, do not convert to UTC or any other time zone.
  • When possible, store in a date-only data type that does not include a time of day.
  • If such a type is not available, be sure to always ignore the time-of-day when interpreting the value. If you cannot be assured that the time-of-day will be ignored, choose 12:00 Noon, rather than 00:00 Midnight as a more safe representative time on that day.
• Remember that time zone offsets are not always an integer number of hours (for example, Indian Standard Time is UTC+05:30, and Nepal uses UTC+05:45).
• If using Java, use java.time for Java 8 and later.
  • Much of that java.time functionality is back-ported to Java 6 & 7 in the ThreeTen-Backport library.
  • Further adapted for early Android (< 26) in the ThreeTenABP library.
  • These projects officially supplant the venerable Joda-Time, now in maintenance-mode. Joda-Time, ThreeTen-Backport, ThreeTen-Extra, java.time classes, and JSR 310 are led by the same man, Stephen Colebourne.
• If using .NET, consider using Noda Time.
• If using .NET without Noda Time, consider that DateTimeOffset is often a better choice than DateTime.
• If using Perl, use DateTime.
• If using Python, use pytz or dateutil.
• If using JavaScript, use moment.js with the moment-timezone extension.
• If using PHP > 5.2, use the native time zones conversions provided by DateTime, and DateTimeZone classes. Be careful when using DateTimeZone::listAbbreviations() - see answer. To keep PHP with up to date Olson data, install periodically the timezonedb PECL package; see answer.
• If using C++, be sure to use a library that uses the properly implements the IANA timezone database. These include cctz, ICU, and Howard Hinnant's "tz" library.
  • Do not use Boost for time zone conversions. While its API claims to support standard IANA (aka "zoneinfo") identifiers, it crudely maps them to POSIX-style data, without considering the rich history of changes each zone may have had. (Also, the file has fallen out of maintenance.)
• If using Rust, use chrono.
• Most business rules use civil time, rather than UTC or GMT. Therefore, plan to convert UTC timestamps to a local time zone before applying application logic.
• Remember that time zones and offsets are not fixed and may change. For instance, historically US and UK used the same dates to 'spring forward' and 'fall back'. However, in 2007 the US changed the dates that the clocks get changed on. This now means that for 48 weeks of the year the difference between London time and New York time is 5 hours and for 4 weeks (3 in the spring, 1 in the autumn) it is 4 hours. Be aware of items like this in any calculations that involve multiple zones.
• Consider the type of time (actual event time, broadcast time, relative time, historical time, recurring time) what elements (timestamp, time zone offset and time zone name) you need to store for correct retrieval - see "Types of Time" in this answer.
• Keep your OS, database and application tzdata files in sync, between themselves and the rest of the world.
• On servers, set hardware clocks and OS clocks to UTC rather than a local time zone.
• Regardless of the previous bullet point, server-side code, including web sites, should never expect the local time zone of the server to be anything in particular. see answer.
• Prefer working with time zones on a case-by-case basis in your application code, rather than globally through config file settings or defaults.
• Use NTP services on all servers.
• If using FAT32, remember that timestamps are stored in local time, not UTC.
• When dealing with recurring events (weekly TV show, for example), remember that the time changes with DST and will be different across time zones.
• Always query date-time values as lower-bound inclusive, upper-bound exclusive (>=, <).

Don't:

• Do not confuse a "time zone", such as America/New_York with a "time zone offset", such as -05:00. They are two different things. See the timezone tag wiki.
• Do not use JavaScript's Date object to perform date and time calculations in older web browsers, as ECMAScript 5.1 and lower has a design flaw that may use daylight saving time incorrectly. (This was fixed in ECMAScript 6 / 2015).
• Never trust the client's clock. It may very well be incorrect.
• Don't tell people to "always use UTC everywhere". This widespread advice is shortsighted of several valid scenarios that are described earlier in this document. Instead, use the appropriate time reference for the data you are working with. (Timestamping can use UTC, but future time scheduling and date-only values should not.)

Testing:

• When testing, make sure you test countries in the Western, Eastern, Northern and Southern hemispheres (in fact in each quarter of the globe, so 4 regions), with both DST in progress and not (gives 8), and a country that does not use DST (another 4 to cover all regions, making 12 in total).
• Test transition of DST, i.e. when you are currently in summer time, select a time value from winter.
• Test boundary cases, such as a timezone that is UTC+12, with DST, making the local time UTC+13 in summer and even places that are UTC+13 in winter
• Test all third-party libraries and applications and make sure they handle time zone data correctly.
• Test half-hour time zones, at least.

Reference:

• The detailed timezone tag wiki page on Stack Overflow
• Olson database, aka Tz_database
• IETF draft procedures for maintaining the Olson database
• Sources for Time Zone and DST
• ISO format (ISO 8601)
• Mapping between Olson database and Windows Time Zone Ids, from the Unicode Consortium
• Time Zone page on Wikipedia
• StackOverflow questions tagged dst
• StackOverflow questions tagged timezone
• Dealing with DST - Microsoft DateTime best practices
• Network Time Protocol on Wikipedia

Other:

• Lobby your representative to end the abomination that is DST. We can always hope...
• Lobby for Earth Standard Time

This is known as a fork bomb. It keeps splitting itself until there is no option but to restart the system. http://en.wikipedia.org/wiki/Fork_bomb

HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Update\TargetingInfo\Installed\Client.OS.rs2.amd64\Version 'For Win 10 Client'

HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Update\TargetingInfo\Installed\Server.OS.amd64\Version 'For Server OS'

In a plain a SQL-Developer installation under Windows go to directory

C:\Program Files\sqldeveloper\sqldeveloper\bin

and add

AddVMOption -Duser.timezone=CET

to file sqldeveloper.conf.

That is because, of course, there is no ACTUAL page height. Keep in mind that you scroll throughout the contents of a page vertically not horizontally, creating a limited width but unlimited height. What the selected answer did was to make the table take up the visible area and stay there no matter what(absolute positioning).So theoretically what you were trying to do was impossible

If you frequently use other algorithms from the STL, there are several advantages to for_each:

1. It will often be simpler and less error prone than a for loop, partly because you'll be used to functions with this interface, and partly because it actually is a little more concise in many cases.
2. Although a range-based for loop can be even simpler, it is less flexible (as noted by Adrian McCarthy, it iterates over a whole container).

3. Unlike a traditional for loop, for_each forces you to write code that will work for any input iterator. Being restricted in this way can actually be a good thing because:

   1. You might actually need to adapt the code to work for a different container later.
   2. At the beginning, it might teach you something and/or change your habits for the better.
   3. Even if you would always write for loops which are perfectly equivalent, other people that modify the same code might not do this without being prompted to use for_each.

4. Using for_each sometimes makes it more obvious that you can use a more specific STL function to do the same thing. (As in Jerry Coffin's example; it's not necessarily the case that for_each is the best option, but a for loop is not the only alternative.)

Not sure if this will benefit anybody, but if you are using Azure CloudShell PowerShell you can just type:

code file.txt

And Visual Studio code will popup with the file to be edit, pretty great.

ep = datetime.datetime(1970,1,1,0,0,0)
x = (datetime.datetime.utcnow()- ep).total_seconds()

This should be different from int(time.time()), but it is safe to use something like x % (60*60*24)

datetime — Basic date and time types:

Unlike the time module, the datetime module does not support leap seconds.

1. Create a new empty Asp.NET Web Application.
2. Solution Explorer right click on the project root.
3. Choose the menu item Add-> Web Service

This should work:

/^((?!PART).)*$/

If you only wanted to exclude it from the beginning of the line (I know you don't, but just FYI), you could use this:

/^(?!PART)/

Edit (by request): Why this pattern works

The (?!...) syntax is a negative lookahead, which I've always found tough to explain. Basically, it means "whatever follows this point must not match the regular expression /PART/." The site I've linked explains this far better than I can, but I'll try to break this down:

^         #Start matching from the beginning of the string.    
(?!PART)  #This position must not be followed by the string "PART".
.         #Matches any character except line breaks (it will include those in single-line mode).
$         #Match all the way until the end of the string.

The ((?!xxx).)* idiom is probably hardest to understand. As we saw, (?!PART) looks at the string ahead and says that whatever comes next can't match the subpattern /PART/. So what we're doing with ((?!xxx).)* is going through the string letter by letter and applying the rule to all of them. Each character can be anything, but if you take that character and the next few characters after it, you'd better not get the word PART.

The ^ and $ anchors are there to demand that the rule be applied to the entire string, from beginning to end. Without those anchors, any piece of the string that didn't begin with PART would be a match. Even PART itself would have matches in it, because (for example) the letter A isn't followed by the exact string PART.

Since we do have ^ and $, if PART were anywhere in the string, one of the characters would match (?=PART). and the overall match would fail. Hope that's clear enough to be helpful.

I'm using out of the box MVC4 with this code (note the two parameters inside ToDictionary)

 var result = new JsonResult()
 {
     Data = new
     {
         partials = GetPartials(data.Partials).ToDictionary(x => x.Key, y=> y.Value)
     }
 };

I get what's expected:

{"partials":{"cartSummary":"\u003cb\u003eCART SUMMARY\u003c/b\u003e"}}

Important: WebAPI in MVC4 uses JSON.NET serialization out of the box, but the standard web JsonResult action result doesn't. Therefore I recommend using a custom ActionResult to force JSON.NET serialization. You can also get nice formatting

Here's a simple actionresult JsonNetResult

http://james.newtonking.com/archive/2008/10/16/asp-net-mvc-and-json-net.aspx

You'll see the difference (and can make sure you're using the right one) when serializing a date:

Microsoft way:

 {"wireTime":"\/Date(1355627201572)\/"}

JSON.NET way:

 {"wireTime":"2012-12-15T19:07:03.5247384-08:00"}

Check your line endings! If you see an error about the file not being found, followed by this "premature of end headers" error in your Apache log - it may be that you have Windows line endings in your script in instead of Unix style. I ran into that problem / solution.

See: http://www.postgresql.org/docs/9.1/static/arrays.html

If your non-native driver still does not allow you to pass arrays, then you can:

• pass a string representation of an array (which your stored procedure can then parse into an array -- see string_to_array)

  CREATE FUNCTION my_method(TEXT) RETURNS VOID AS $$ 
  DECLARE
         ids INT[];
  BEGIN
         ids = string_to_array($1,',');
         ...
  END $$ LANGUAGE plpgsql;
  

  then

  SELECT my_method(:1)
  

  with :1 = '1,2,3,4'

• rely on Postgres itself to cast from a string to an array

  CREATE FUNCTION my_method(INT[]) RETURNS VOID AS $$ 
         ...
  END $$ LANGUAGE plpgsql;
  

  then

  SELECT my_method('{1,2,3,4}')
  

• choose not to use bind variables and issue an explicit command string with all parameters spelled out instead (make sure to validate or escape all parameters coming from outside to avoid SQL injection attacks.)

  CREATE FUNCTION my_method(INT[]) RETURNS VOID AS $$ 
         ...
  END $$ LANGUAGE plpgsql;
  

  then

  SELECT my_method(ARRAY [1,2,3,4])
  

Using the second form gives you a variable (named based upon the as clause, in your example e) in the except block scope with the exception object bound to it so you can use the infomration in the exception (type, message, stack trace, etc) to handle the exception in a more specially tailored manor.

Only one condition, I tested that it wasn't null was, if you allow enough time to user to touch the "get my location" layer button, then it will not get null value.

In VB it's:

if not MyNameValueCollection(Key) is Nothing then
.......
end if

In C# should just be:

if (MyNameValueCollection(Key) != null) { }

Not sure if it should be null or "" but this should help.

A cleaner alternative would be to use a Dictionary to handle parameters. They are key-value pairs after all.

private static readonly HttpClient httpclient;

static MyClassName()
{
    // HttpClient is intended to be instantiated once and re-used throughout the life of an application. 
    // Instantiating an HttpClient class for every request will exhaust the number of sockets available under heavy loads. 
    // This will result in SocketException errors.
    // https://docs.microsoft.com/en-us/dotnet/api/system.net.http.httpclient?view=netframework-4.7.1
    httpclient = new HttpClient();    
} 

var url = "http://myserver/method";
var parameters = new Dictionary<string, string> { { "param1", "1" }, { "param2", "2" } };
var encodedContent = new FormUrlEncodedContent (parameters);

var response = await httpclient.PostAsync (url, encodedContent).ConfigureAwait (false);
if (response.StatusCode == HttpStatusCode.OK) {
    // Do something with response. Example get content:
    // var responseContent = await response.Content.ReadAsStringAsync ().ConfigureAwait (false);
}

Also dont forget to Dispose() httpclient, if you dont use the keyword using

As stated in the Remarks section of the HttpClient class in the Microsoft docs, HttpClient should be instantiated once and re-used.

Edit:

You may want to look into response.EnsureSuccessStatusCode(); instead of if (response.StatusCode == HttpStatusCode.OK).

You may want to keep your httpclient and dont Dispose() it. See: Do HttpClient and HttpClientHandler have to be disposed?

Edit:

Do not worry about using .ConfigureAwait(false) in .NET Core. For more details look at https://blog.stephencleary.com/2017/03/aspnetcore-synchronization-context.html

You should install the PHP 5 library for Apache.

For Debian and Ubuntu:

apt-get install libapache2-mod-php5

And restart the Apache:

service apache2 restart

Try this:

if cookie and not cookie.isspace():
    # the string is non-empty
else:
    # the string is empty

The above takes in consideration the cases where the string is None or a sequence of white spaces.

The difference is that Java binaries compiled as x86 (32-bit) or x64 (64-bit) applications respectively.

On a 64-bit Windows you can use either version, since x86 will run in WOW64 mode. On a 32-bit Windows you should use only x86 obviously.

For a Linux you should select appropriate type x86 for 32-bit OS, and x64 for 64-bit OS.

Just write this command in the VS Code terminal of your project and restart the project.

npm install rxjs-compat

You need to import the map operator by adding this:

import 'rxjs/add/operator/map';

I would point out that (functionally) there's a BIG difference between cycles and/or multiple paths in the SCHEMA and the DATA. While cycles and perhaps multipaths in the DATA could certainly complicated processing and cause performance problems (cost of "properly" handling), the cost of these characteristics in the schema should be close to zero.

Since most apparent cycles in RDBs occur in hierarchical structures (org chart, part, subpart, etc.) it is unfortunate that SQL Server assumes the worst; i.e., schema cycle == data cycle. In fact, if you're using RI constraints you can't actually build a cycle in the data!

I suspect the multipath problem is similar; i.e., multiple paths in the schema don't necessarily imply multiple paths in the data, but I have less experience with the multipath problem.

Of course if SQL Server did allow cycles it'd still be subject to a depth of 32, but that's probably adequate for most cases. (Too bad that's not a database setting however!)

"Instead of Delete" triggers don't work either. The second time a table is visited, the trigger is ignored. So, if you really want to simulate a cascade you'll have to use stored procedures in the presence of cycles. The Instead-of-Delete-Trigger would work for multipath cases however.

Celko suggests a "better" way to represent hierarchies that doesn't introduce cycles, but there are tradeoffs.

Another attempt to explain JavaScript prototype-based inheritance with better pictures

Use the ToString() method - standard and custom numeric format strings. Have a look at the MSDN article How to: Pad a Number with Leading Zeros.

string text = no.ToString("0000");

Just try this:

<button type="button">Click Me</button>
<p></p>
<script type="text/javascript">
    $(document).ready(function(){
        $("button").click(function(){

            $.ajax({
                type: 'POST',
                url: 'script.php',
                success: function(data) {
                    alert(data);
                    $("p").text(data);

                }
            });
   });
});
</script>

In script.php

<?php 
  echo "You win";
 ?>

Example in Swift 3, with a previous and a next button in the top right.

let prevButtonItem = UIBarButtonItem(title: "\u{25C0}", style: .plain, target: self, action: #selector(prevButtonTapped))
let nextButtonItem = UIBarButtonItem(title: "\u{25B6}", style: .plain, target: self, action: #selector(nextButtonTapped))
self.navigationItem.rightBarButtonItems = [nextButtonItem, prevButtonItem]

You can't put a div directly inside a table but you can put div inside td or th element.

For that you need to do is make sure the div is inside an actual table cell, a td or th element, so do that:

HTML:-

<tr>
  <td>
    <div>
      <p>I'm text in a div.</p>
    </div>
  </td>
</tr>

For more information :-

http://css-tricks.com/using-divs-inside-tables/

Answer for Angular 2+

Remove component from imports and declaration array of app.modules.ts.

Second check its reference is added in other module, if yes then remove it and

finally delete that component Manually from app and you are done.

Or you can do it in reverse order also.

glob.glob or os.listdir will do it.

The benefit of not calling via the shell is that you are not invoking a 'mystery program.' On POSIX, the environment variable SHELL controls which binary is invoked as the "shell." On Windows, there is no bourne shell descendent, only cmd.exe.

So invoking the shell invokes a program of the user's choosing and is platform-dependent. Generally speaking, avoid invocations via the shell.

Invoking via the shell does allow you to expand environment variables and file globs according to the shell's usual mechanism. On POSIX systems, the shell expands file globs to a list of files. On Windows, a file glob (e.g., "*.*") is not expanded by the shell, anyway (but environment variables on a command line are expanded by cmd.exe).

If you think you want environment variable expansions and file globs, research the ILS attacks of 1992-ish on network services which performed subprogram invocations via the shell. Examples include the various sendmail backdoors involving ILS.

In summary, use shell=False.

foreach (var v in structure) 
{     
    var group = groups.Single(g => g.Key == v. ??? );
    v.ListOfSmth = group.ToList();
}

First you need to select the desired group. Then you can use the ToList method of on the group. The IGrouping is a IEnumerable of the values.

res.setHeader('Access-Control-Allow-Headers',
            'Access-Control-Allow-Headers, Origin,OPTIONS,Accept,Authorization, X-Requested-With, Content-Type, Access-Control-Request-Method, Access-Control-Request-Headers');

Blockquote : you have to add OPTIONS & Authorization to the setHeader()

this change has fixed my problem, just give a try!

Sometimes, you really don't care about the collection itself. For instance, creating a simple model fit line to compare an "approximation" with the raw data:

fib_raw = [1, 1, 2, 3, 5, 8, 13, 21] # Fibonacci numbers

phi = (1 + sqrt(5)) / 2
phi2 = (1 - sqrt(5)) / 2

def fib_approx(n): return (phi**n - phi2**n) / sqrt(5)

x = range(len(data))
y = [fib_approx(n) for n in x]

# Now plot to compare fib_raw and y
# Compare error, etc

In this case, the values of the Fibonacci sequence itself were irrelevant. All we needed here was the size of the input sequence we were comparing with.

FWIW, git rebase interactive now has a "reword" option, which makes this much less painful!

ObervableCollection have constructor in which you can pass your list. Quoting MSDN:

 public ObservableCollection(
      List<T> list
 )

For True, not None:

if foo:

For false, None:

if not foo:

No, you cannot set them all in a single statement.
At the general case, you need at least three properties:

border-color: red green white blue;
border-style: solid dashed dotted solid;
border-width: 1px 2px 3px 4px;

However, that would be quite messy. It would be more readable and maintainable with four:

border-top:    1px solid  #ff0;
border-right:  2px dashed #f0F;
border-bottom: 3px dotted #f00;
border-left:   5px solid  #09f;

<div>
    <h1> Ok </h1>
    <button type='button'>Button</button>
    <div style="clear:both;"></div>
</div>

css

div {
    background: purple;
}

div h1 {
    text-align: center;
}

div button {
    float: right;
    margin-right:10px;

}

The answer depends on your view point:

If you judge by the C++ standard, you cannot get a null reference because you get undefined behavior first. After that first incidence of undefined behavior, the standard allows anything to happen. So, if you write *(int*)0, you already have undefined behavior as you are, from a language standard point of view, dereferencing a null pointer. The rest of the program is irrelevant, once this expression is executed, you are out of the game.

However, in practice, null references can easily be created from null pointers, and you won't notice until you actually try to access the value behind the null reference. Your example may be a bit too simple, as any good optimizing compiler will see the undefined behavior, and simply optimize away anything that depends on it (the null reference won't even be created, it will be optimized away).

Yet, that optimizing away depends on the compiler to prove the undefined behavior, which may not be possible to do. Consider this simple function inside a file converter.cpp:

int& toReference(int* pointer) {
    return *pointer;
}

When the compiler sees this function, it does not know whether the pointer is a null pointer or not. So it just generates code that turns any pointer into the corresponding reference. (Btw: This is a noop since pointers and references are the exact same beast in assembler.) Now, if you have another file user.cpp with the code

#include "converter.h"

void foo() {
    int& nullRef = toReference(nullptr);
    cout << nullRef;    //crash happens here
}

the compiler does not know that toReference() will dereference the passed pointer, and assume that it returns a valid reference, which will happen to be a null reference in practice. The call succeeds, but when you try to use the reference, the program crashes. Hopefully. The standard allows for anything to happen, including the appearance of pink elephants.

You may ask why this is relevant, after all, the undefined behavior was already triggered inside toReference(). The answer is debugging: Null references may propagate and proliferate just as null pointers do. If you are not aware that null references can exist, and learn to avoid creating them, you may spend quite some time trying to figure out why your member function seems to crash when it's just trying to read a plain old int member (answer: the instance in the call of the member was a null reference, so this is a null pointer, and your member is computed to be located as address 8).

So how about checking for null references? You gave the line

if( & nullReference == 0 ) // null reference

in your question. Well, that won't work: According to the standard, you have undefined behavior if you dereference a null pointer, and you cannot create a null reference without dereferencing a null pointer, so null references exist only inside the realm of undefined behavior. Since your compiler may assume that you are not triggering undefined behavior, it can assume that there is no such thing as a null reference (even though it will readily emit code that generates null references!). As such, it sees the if() condition, concludes that it cannot be true, and just throw away the entire if() statement. With the introduction of link time optimizations, it has become plain impossible to check for null references in a robust way.

TL;DR:

Null references are somewhat of a ghastly existence:

Their existence seems impossible (= by the standard),
but they exist (= by the generated machine code),
but you cannot see them if they exist (= your attempts will be optimized away),
but they may kill you unaware anyway (= your program crashes at weird points, or worse).
Your only hope is that they don't exist (= write your program to not create them).

I do hope that will not come to haunt you!

In datatable options put this:

$(document).ready( function() {
  $('#example').dataTable({
    "aaSorting": [[ 2, 'asc' ]], 
    //More options ...

   });
})

Here is the solution: "aaSorting": [[ 2, 'asc' ]],

2 means table will be sorted by third column,
asc in ascending order.

Java does not have pointers like C has, but it does allow you to create new objects on the heap which are "referenced" by variables. The lack of pointers is to stop Java programs from referencing memory locations illegally, and also enables Garbage Collection to be automatically carried out by the Java Virtual Machine.

I received the same console error message when working with this example: https://developers.google.com/analytics/devguides/reporting/embed/v1/getting-started

The documentation says not to overlook two critical steps ("As you go through the instructions, it's important that you not overlook these two critical steps: Enable the Analytics API [&] Set the correct origins"), but does not clearly state WHERE to set the correct origins.

Since the client ID I had was not working, I created a new project and a new client ID. The new project may not have been necessary, but I'm retaining (and using) it.

Here's what worked:

• Create a new project
• Add and Enable the Analytics API
• Create a new credential - ensure that it is an OAUTH credential (scroll to the bottom of this page for instructions https://developers.google.com/api-client-library/javascript/start/start-js#Setup).

During creation of the credentials, you will see a section called "Restrictions Enter JavaScript origins, redirect URIs, or both". This is where you can enter your origins.

Save and copy your client ID (and secret).

My script worked after I created the new OAUTH credential, assigned the origin, and used the newly generated client ID following this process.

I resolved this by clearing App Data.

Cypress documentation admits that App Data can get corrupted:

Cypress maintains some local application data in order to save user preferences and more quickly start up. Sometimes this data can become corrupted. You may fix an issue you have by clearing this app data.

1. Open Cypress via cypress open
2. Go to File -> View App Data
3. This will take you to the directory in your file system where your App Data is stored. If you cannot open Cypress, search your file system for a directory named cy whose content should look something like this:

       production
            all.log
            browsers
            bundles
            cache
            projects
            proxy
            state.json

4. Delete everything in the cy folder
5. Close Cypress and open it up again

Source: https://docs.cypress.io/guides/references/troubleshooting.html#To-clear-App-Data

Why don't you just use a singleton?

import android.content.Context;


public class ClassicSingleton {
    private Context c=null;
    private static ClassicSingleton instance = null;
    protected ClassicSingleton()
    {
       // Exists only to defeat instantiation.
    }
    public void setContext(Context ctx)
    {
    c=ctx;
    }
    public Context getContext()
    {
       return c;
    }
    public static ClassicSingleton getInstance()
    {
        if(instance == null) {
            instance = new ClassicSingleton();
        }
        return instance;
    }
}

Then in the activity class:

 private ClassicSingleton cs = ClassicSingleton.getInstance();

And in the non activity class:

ClassicSingleton cs= ClassicSingleton.getInstance();
        Context c=cs.getContext();
        ImageView imageView = (ImageView) ((Activity)c).findViewById(R.id.imageView1);

Use ByteArrayInputStream:

InputStream is = new ByteArrayInputStream(decodedBytes);

Sub Addrisk()

Dim rActive As Range
Dim Count_Id_Column as long

Set rActive = ActiveCell

Application.ScreenUpdating = False

with thisworkbook.sheets(1) 'change to "sheetname" or sheetindex
    for i = 1 to .range("A1045783").end(xlup).row
        if 'something'  = 'something' then
            .range("A" & i).EntireRow.Copy 'add thisworkbook.sheets(index_of_sheet) if you copy from another sheet
            .range("A" & i).entirerow.insert shift:= xldown 'insert and shift down, can also use xlup
            .range("A" & i + 1).EntireRow.paste 'paste is all, all other defs are less.
            'change I to move on to next row (will get + 1 end of iteration)
            i = i + 1
        end if

            On Error Resume Next
                .SpecialCells(xlCellTypeConstants).ClearContents
            On Error GoTo 0

        End With
    next i
End With

Application.CutCopyMode = False
Application.ScreenUpdating = True 're-enable screen updates

End Sub

Similar problem here: Given a string and a list of keywords, detect which, if any, of the keywords are contained in the string.

Recommendations from this thread suggest stringr's str_detect and grepl. Here are the benchmarks from the microbenchmark package:

Using

map_keywords = c("once", "twice", "few")
t = "yes but only a few times"

mapper1 <- function (x) {
  r = str_detect(x, map_keywords)
}

mapper2 <- function (x) {
  r = sapply(map_keywords, function (k) grepl(k, x, fixed = T))
}

and then

microbenchmark(mapper1(t), mapper2(t), times = 5000)

we find

Unit: microseconds
       expr    min     lq     mean  median      uq      max neval
 mapper1(t) 26.401 27.988 31.32951 28.8430 29.5225 2091.476  5000
 mapper2(t) 19.289 20.767 24.94484 23.7725 24.6220 1011.837  5000

As you can see, over 5,000 iterations of the keyword search using str_detect and grepl over a practical string and vector of keywords, grepl performs quite a bit better than str_detect.

The outcome is the boolean vector r which identifies which, if any, of the keywords are contained in the string.

Therefore, I recommend using grepl to determine if any keywords are in a string.

From here:

-Xmn : the size of the heap for the young generation

Young generation represents all the objects which have a short life of time. Young generation objects are in a specific location into the heap, where the garbage collector will pass often. All new objects are created into the young generation region (called "eden"). When an object survive is still "alive" after more than 2-3 gc cleaning, then it will be swap has an "old generation" : they are "survivor".

And a more "official" source from IBM:

-Xmn

Sets the initial and maximum size of the new (nursery) heap to the specified value when using -Xgcpolicy:gencon. Equivalent to setting both -Xmns and -Xmnx. If you set either -Xmns or -Xmnx, you cannot set -Xmn. If you attempt to set -Xmn with either -Xmns or -Xmnx, the VM will not start, returning an error. By default, -Xmn is selected internally according to your system's capability. You can use the -verbose:sizes option to find out the values that the VM is currently using.

The simplest answer in C# (if you are C# inclined).

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

This answer is almost given by Hari Reddy, but I have fixed the case which he'd got wrong on some keywords, added the KeyUp or you get in a mess leaving the control key down.

I've also added the clarification on OpenQA.Selenium.Keys, because you may also be using Windows.Forms on the same class as I was an require this clarity.

Lastly, I type "a" because I found that to be the simplest way and I can see no suggestion from the OP that they don't want the simplest answer.

Many thanks to Hari Reddy though as I was a novice in Actions class usage and I was writing many different commands. Chaining them together the way he showed is quicker :-)

As stated in other answers, label is an inline element. However, you can apply display: inline-block to the label and then center with text-align.

#name_label {
    display: inline-block;
    width: 90%;
    text-align: right;
}

Why display: inline-block and not display: inline? For the same reason that you can't align label, it's inline.

Why display: inline-block and not display: block? You could use display: block, but it will be on another line. display: inline-block combines the properties of inline and block. It's inline, but you can also give it a width, height, and align it.

There are three ways to fetch multiple rows returned by PDO statement.

The simplest one is just to iterate over PDOStatement itself:

$stmt = $pdo->prepare("SELECT * FROM auction WHERE name LIKE ?")
$stmt->execute(array("%$query%"));
// iterating over a statement
foreach($stmt as $row) {
    echo $row['name'];
}

another one is to fetch rows using fetch() method inside a familiar while statement:

$stmt = $pdo->prepare("SELECT * FROM auction WHERE name LIKE ?")
$stmt->execute(array("%$query%"));
// using while
while($row = $stmt->fetch()) {
    echo $row['name'];
}

but for the modern web application we should have our datbase iteractions separated from output and thus the most convenient method would be to fetch all rows at once using fetchAll() method:

$stmt = $pdo->prepare("SELECT * FROM auction WHERE name LIKE ?")
$stmt->execute(array("%$query%"));
// fetching rows into array
$data = $stmt->fetchAll();

or, if you need to preprocess some data first, use the while loop and collect the data into array manually

$result = [];
$stmt = $pdo->prepare("SELECT * FROM auction WHERE name LIKE ?")
$stmt->execute(array("%$query%"));
// using while
while($row = $stmt->fetch()) {
    $result[] = [
        'newname' => $row['oldname'],
        // etc
    ];
}

and then output them in a template:

<ul>
<?php foreach($data as $row): ?>
    <li><?=$row['name']?></li>
<?php endforeach ?>
</ul>

Note that PDO supports many sophisticated fetch modes, allowing fetchAll() to return data in many different formats.

It allows browsers to determine if they can handle the scripting/style language before making a request for the script or stylesheet (or, in the case of embedded script/style, identify which language is being used).

This would be much more important if there had been more competition among languages in browser space, but VBScript never made it beyond IE and PerlScript never made it beyond an IE specific plugin while JSSS was pretty rubbish to begin with.

The draft of HTML5 makes the attribute optional.

Hide columns dynamically

The previous answers are using legacy DataTables syntax. In v 1.10+, you can use column().visible():

var dt = $('#example').DataTable();
//hide the first column
dt.column(0).visible(false);

To hide multiple columns, columns().visible() can be used:

var dt = $('#example').DataTable();
//hide the second and third columns
dt.columns([1,2]).visible(false);

Here is a Fiddle Demo.

Hide columns when the table is initialized

To hide columns when the table is initialized, you can use the columns option:

$('#example').DataTable( {
    'columns' : [
        null,
        //hide the second column
        {'visible' : false },
        null,
        //hide the fourth column
        {'visible' : false }
    ]
});

For the above method, you need to specify null for columns that should remain visible and have no other column options specified. Or, you can use columnDefs to target a specific column:

$('#example').DataTable( {
    'columnDefs' : [
        //hide the second & fourth column
        { 'visible': false, 'targets': [1,3] }
    ]
});

You can configure logging in your settings.py file.

One example:

if DEBUG:
    # will output to your console
    logging.basicConfig(
        level = logging.DEBUG,
        format = '%(asctime)s %(levelname)s %(message)s',
    )
else:
    # will output to logging file
    logging.basicConfig(
        level = logging.DEBUG,
        format = '%(asctime)s %(levelname)s %(message)s',
        filename = '/my_log_file.log',
        filemode = 'a'
    )

However that's dependent upon setting DEBUG, and maybe you don't want to have to worry about how it's set up. See this answer on How can I tell whether my Django application is running on development server or not? for a better way of writing that conditional. Edit: the example above is from a Django 1.1 project, logging configuration in Django has changed somewhat since that version.

Check for a static version of your page in /public and delete it if it's there. When Rails 3.x caches pages, it leaves a static version in your public folder and loads that when users hit your site. This will remain even after you clear your cache.

Create a WebViewClient, and override the shouldOverrideUrlLoading method.

webview.setWebViewClient(new WebViewClient() {
    public boolean shouldOverrideUrlLoading(WebView view, String url){
        // do your handling codes here, which url is the requested url
        // probably you need to open that url rather than redirect:
        view.loadUrl(url);
        return false; // then it is not handled by default action
   }
});

For json to xml use the following Jackson example:

final String str = "{\"name\":\"JSON\",\"integer\":1,\"double\":2.0,\"boolean\":true,\"nested\":{\"id\":42},\"array\":[1,2,3]}";
ObjectMapper jsonMapper = new ObjectMapper();
JsonNode node = jsonMapper.readValue(str, JsonNode.class);
XmlMapper xmlMapper = new XmlMapper();
        xmlMapper.configure(SerializationFeature.INDENT_OUTPUT, true);
        xmlMapper.configure(ToXmlGenerator.Feature.WRITE_XML_DECLARATION, true);
        xmlMapper.configure(ToXmlGenerator.Feature.WRITE_XML_1_1, true);
StringWriter w = new StringWriter();
xmlMapper.writeValue(w, node);
System.out.println(w.toString());

Prints:

<?xml version='1.1' encoding='UTF-8'?>
<ObjectNode>
  <name>JSON</name>
  <integer>1</integer>
  <double>2.0</double>
  <boolean>true</boolean>
  <nested>
    <id>42</id>
  </nested>
  <array>1</array>
  <array>2</array>
  <array>3</array>
</ObjectNode>

To convert it back (xml to json) take a look at this answer https://stackoverflow.com/a/62468955/1485527 .

The subset command is not necessary. Just use data frame indexing

studentdata[studentdata$Drink == 'water',]

Read the warning from ?subset

This is a convenience function intended for use interactively. For programming it is better to use the standard subsetting functions like ‘[’, and in particular the non-standard evaluation of argument ‘subset’ can have unanticipated consequences.

if the other div is sibling/child, or any combination of, of the parent yes

    .showme{ _x000D_
        display: none;_x000D_
    }_x000D_
    .showhim:hover .showme{_x000D_
        display : block;_x000D_
    }_x000D_
    .showhim:hover .hideme{_x000D_
        display : none;_x000D_
    }_x000D_
    .showhim:hover ~ .hideme2{ _x000D_
        display:none;_x000D_
    }

    <div class="showhim">_x000D_
        HOVER ME_x000D_
        <div class="showme">hai</div> _x000D_
        <div class="hideme">bye</div>_x000D_
    </div>_x000D_
    <div class="hideme2">bye bye</div>

Without using datetime object in python.

# A date has day 'd', month 'm' and year 'y' 
class Date:
    def __init__(self, d, m, y):
            self.d = d
            self.m = m
            self.y = y

# To store number of days in all months from 
# January to Dec. 
monthDays = [31, 28, 31, 30, 31, 30,
                                            31, 31, 30, 31, 30, 31 ]

# This function counts number of leap years 
# before the given date 
def countLeapYears(d):

    years = d.y

    # Check if the current year needs to be considered 
    # for the count of leap years or not 
    if (d.m <= 2) :
            years-= 1

    # An year is a leap year if it is a multiple of 4, 
    # multiple of 400 and not a multiple of 100. 
    return int(years / 4 - years / 100 + years / 400 )


# This function returns number of days between two 
# given dates 
def getDifference(dt1, dt2) :

    # COUNT TOTAL NUMBER OF DAYS BEFORE FIRST DATE 'dt1' 

    # initialize count using years and day 
    n1 = dt1.y * 365 + dt1.d

    # Add days for months in given date 
    for i in range(0, dt1.m - 1) :
            n1 += monthDays[i]

    # Since every leap year is of 366 days, 
    # Add a day for every leap year 
    n1 += countLeapYears(dt1)

    # SIMILARLY, COUNT TOTAL NUMBER OF DAYS BEFORE 'dt2' 

    n2 = dt2.y * 365 + dt2.d
    for i in range(0, dt2.m - 1) :
            n2 += monthDays[i]
    n2 += countLeapYears(dt2)

    # return difference between two counts 
    return (n2 - n1)


# Driver program 
dt1 = Date(31, 12, 2018 )
dt2 = Date(1, 1, 2019 )

print(getDifference(dt1, dt2), "days")

The parent component can manage child state passing a prop to child and the child convert this prop in state using componentWillReceiveProps.

class ParentComponent extends Component {
  state = { drawerOpen: false }
  toggleChildMenu = () => {
    this.setState({ drawerOpen: !this.state.drawerOpen })
  }
  render() {
    return (
      <div>
        <button onClick={this.toggleChildMenu}>Toggle Menu from Parent</button>
        <ChildComponent drawerOpen={this.state.drawerOpen} />
      </div>
    )
  }
}

class ChildComponent extends Component {
  constructor(props) {
    super(props)
    this.state = {
      open: false
    }
  }

  componentWillReceiveProps(props) {
    this.setState({ open: props.drawerOpen })
  }

  toggleMenu() {
    this.setState({
      open: !this.state.open
    })
  }

  render() {
    return <Drawer open={this.state.open} />
  }
}

All DDL statements in Oracle PL/SQL should use Execute Immediate before the statement. Hence you should use:

execute immediate 'truncate table schema.tablename';

Reassign owned didn't work for me as I was wanted to change tables owned by postgres.

I ended up using Alex's method, however I wanted to do this from within psql. The following was sufficient for me.

DO $$
DECLARE
    rec record;
BEGIN
    FOR rec in 
        SELECT *
        FROM pg_tables
        where schemaname = 'public'
LOOP
    EXECUTE 'alter table ' || quote_ident(rec.tablename) || ' owner to new_owner';
    END LOOP;
END
$$;

Check out ALL_TRIGGERS:

http://download.oracle.com/docs/cd/B19306_01/server.102/b14237/statviews_2107.htm#i1592586

IIF is a non-standard T-SQL function. It was added to SQL SERVER 2012, so that Access could migrate to SQL Server without refactoring the IIF's to CASE before hand. Once the Access db is fully migrated into SQL Server, you can refactor.

JsVIS was pretty nice, but slow with larger graphs, and has been abandoned since 2007.

prefuse is a set of software tools for creating rich interactive data visualizations in Java. flare is an ActionScript library for creating visualizations that run in the Adobe Flash Player, abandoned since 2012.

A 32-bit unsigned int has a range from 0 to 4,294,967,295. 0 to 65535 would be a 16-bit unsigned.

An unsigned long long (and, on a 64-bit implementation, possibly also ulong and possibly uint as well) have a range (at least) from 0 to 18,446,744,073,709,551,615 (2⁶⁴-1). In theory it could be greater than that, but at least for now that's rare to nonexistent.

Short Answer

Yes.

Explanation

It is a good practice since an element can be a part of different groups, and you may want specific elements to be a part of more than one group. The element can hold an infinite number of classes in HTML5, while in HTML4 you are limited by a specific length.

The following example will show you the use of multiple classes.

The first class makes the text color red.

The second class makes the background-color blue.

See how the DOM Element with multiple classes will behave, it will wear both CSS statements at the same time.

Result: multiple CSS statements in different classes will stack up.

You can read more about CSS Specificity.

CSS

.class1 {
    color:red;
}

.class2 {
    background-color:blue;
}

HTML

<div class="class1">text 1</div>
<div class="class2">text 2</div>
<div class="class1 class2">text 3</div>

Live demo

To take a quick look, you can percent-en/decode using this online tool.

Actually easiest way to fix this is just move your object before Javascript code it worked to me. I guess in your answer object is loaded after javascript code.

<style type="text/css" >
      #map_canvas {
              width:300px;
            height:300px;
     }

 <div id="map_canvas"> </div> // Here 

<script type="text/javascript">

var latlng = new google.maps.LatLng(-34.397, 150.644);
var myOptions = {
zoom: 8,
      center: latlng,
      mapTypeId: google.maps.MapTypeId.ROADMAP
};
var map = new google.maps.Map(document.getElementById("map_canvas"),
            myOptions);

</script>

<div id="map_canvas"> </div>

I use the following method to calculate the desired image size:

using System.Drawing;
public static Size ResizeKeepAspect(this Size src, int maxWidth, int maxHeight, bool enlarge = false)
{
    maxWidth = enlarge ? maxWidth : Math.Min(maxWidth, src.Width);
    maxHeight = enlarge ? maxHeight : Math.Min(maxHeight, src.Height);

    decimal rnd = Math.Min(maxWidth / (decimal)src.Width, maxHeight / (decimal)src.Height);
    return new Size((int)Math.Round(src.Width * rnd), (int)Math.Round(src.Height * rnd));
}

This puts the problem of aspect ratio and dimensions in a separate method.

For ones who got permission denied for saving operation, here is the command that worked for me:

$ curl https://www.python.org/static/apple-touch-icon-144x144-precomposed.png --output py.png

You want awk.

This would be a quick and dirty hack:

awk -F "\"" '{print $2}' /tmp/file.txt

PortMappingEnabled
PortMappingLeaseDuration
RemoteHost
ExternalPort
ExternalPortEndRange
InternalPort
PortMappingProtocol
InternalClient
PortMappingDescription

You're running into a CORS error.

Trying to access your file using the local file system doesn't work in your case.

Origin is null because it's your local file system. Could you possibly host this png file?

Suggestion:

Host these files to an AWS S3 bucket instead. Then you can use the http protocol rather than the file protocol. OR setup some http server on your local system and use http to your localhost to serve the files from if you want to keep everything local.

More Reading:

How CORS Works

You can auto generate Image map from this website for selected area of image. https://www.image-map.net/

Easiest way to execute!

You can use this or refer further this https://select2.org/programmatic-control/add-select-clear-items

$('#mySelect2').val(null).trigger('change');

For Python 2:

>>> execfile('filename.py')

For Python 3:

>>> exec(open("filename.py").read())
# or
>>> from pathlib import Path
>>> exec(Path("filename.py").read_text())

See the documentation. If you are using Python 3.0, see this question.

See answer by @S.Lott for an example of how you access globals from filename.py after executing it.

man date on OSX has this example

date -j -f "%a %b %d %T %Z %Y" "`date`" "+%s"

Which I think does what you want.

You can use this for a specific date

date -j -f "%a %b %d %T %Z %Y" "Tue Sep 28 19:35:15 EDT 2010" "+%s"

Or use whatever format you want.

The difference between "" and () is:

With "" you are not calling anything.
With () you are calling a sub.

Example with sub:

Sub = MsgBox("Msg",vbYesNo,vbCritical,"Title")
Select Case Sub
     Case = vbYes
          MsgBox"You said yes"
     Case = vbNo
          MsgBox"You said no"
 End Select

vs Normal:

 MsgBox"This is normal"

The problem is that you forgot to import os. Add this line of code:

import os

And everything should be fine. Hope this helps!

Here is what worked for me. First, let us understand the problem. You cannot use a variable as argument to require. Webpack needs to know what files to bundle at compile time.

When I got the error, I thought it may be related to path issue as in absolute vs relative. So I passed a hard-coded value to require like below: <img src={require("../assets/images/photosnap.svg")} alt="" />. It was working fine. But in my case the value is a variable coming from props. I tried to pass a string literal variable as some suggested. It did not work. Also I tried to define a local method using switch case for all 10 values (I knew it was not best solution, but I just wanted it to work somehow). That too did not work. Then I came to know that we can NOT pass variable to the require.

As a workaround I have modified the data in the data.json file to confine it to just the name of my image. This image name which is coming from the props as a String literal. I concatenated it to the hard coded value, like so:

import React from "react";

function JobCard(props) {  

  const { logo } = props;
  
  return (
      <div className="jobCards">
          <img src={require(`../assets/images/${logo}`)} alt="" /> 
      </div>
    )
} 
  

The actual value contained in the logo would be coming from data.json file and would refer to some image name like photosnap.svg.

Simplay you can place HTML select attribute to option a like shown below

Define the attributes like selected="selected"

<select>
   <option selected="selected">a</option>
   <option>b</option>
   <option>c</option>
</select>

There are scenarios in wich you cannot use bc becouse it might simply not be present, like in some cut down versions of busybox or embedded systems. In any case limiting outer dependencies is always a good thing to do so you can always add zeroes to the number being divided by (numerator), that is the same as multiplying by a power of 10 (you should choose a power of 10 according to the precision you need), that will make the division output an integer number. Once you have that integer treat it as a string and position the decimal point (moving it from right to left) a number of times equal to the power of ten you multiplied the numerator by. This is a simple way of obtaining float results by using only integer numbers.

Viblend WPF themes are free.

$ unset GOROOT worked for me. As most answers suggest your GOROOT is invalid.

best way to get key/value of object.

let obj = {_x000D_
        'key1': 'value1',_x000D_
        'key2': 'value2',_x000D_
        'key3': 'value3',_x000D_
        'key4': 'value4'_x000D_
    }_x000D_
    Object.keys(obj).map(function(k){ _x000D_
    console.log("key with value: "+k +" = "+obj[k])    _x000D_
    _x000D_
    })_x000D_
    

I had the same problem. I made it work with:

"C:\Program Files (x86)\Android\android-sdk\tools\emulator-arm.exe"  @foo

foo is the name of your virtual device.

Maybe use atribute disabled:

<input disabled="disabled" id="fieldName" name="fieldName" type="text" class="text_box" />

Or just use label tag: ;)

<label>

The function ob_start() will turn output buffering on. While output buffering is active no output is sent from the script (other than headers), instead the output is stored in an internal buffer. So browser will not receive any output and the header will work.Also we should make sure that header() is used on the top of the code.

Another much simpler possibility is that one of your property names is wrong (probably one you just changed in the class). This is what it was for me in RazorPages .NET Core 3.

Update: 8-20-2015

Please note the instructions have changed since this question was asked 2 yrs ago.

So on Newer versions of Android and Chrome for Android. You need to use this.

https://developers.google.com/web/tools/setup/remote-debugging/remote-debugging?hl=en

Original Answer:

I have the S3 and it works fine. I have found that a common mistake is not enabling USB Debugging in Chrome mobile. Not only do you have to enable USB debugging on the device itself under developer options but you have to go to the Chrome Browser on your phone and enable it in the settings there too.

Try this with the SDK

1. Chrome for Mobile - Settings > Developer Tools > [x] Enable USB Web debugging
2. Device - Settings > Developer options > [x] USB debugging
3. Connect Device to Computer

4. Enable port forwarding on your computer by doing the following command below

   C:\adb forward tcp:9222 localabstract:chrome_devtools_remote

Go to http://localhost:9222 in Chrome on your Computer

TroubleShooting:

If you get command not found when trying to run ADB, make sure Platform-Tools is in your path or just use the whole path to your SDK and run it

C:\path-to-SDK\platform-tools\adb forward tcp:9222 localabstract:chrome_devtools_remote

If you get "device not found", then run adb kill-server and then try again.

Another option:

this.form.value['nameOfControl']

I had to add !important to get it to work. I also made my own class button-primary-override.

.button-primary-override:hover, 
.button-primary-override:active,
.button-primary-override:focus,
.button-primary-override:visited{
    background-color: #42A5F5 !important;
    border-color: #42A5F5 !important;
    background-image: none !important;
    border: 0 !important;
}

a one line solution is to use the Z symbol like:

new SimpleDateFormat(pattern, Locale.getDefault()).format(System.currentTimeMillis());

where pattern could be:

• Z/ZZ/ZZZ: -0800
• ZZZZ: GMT-08:00
• ZZZZZ: -08:00

full reference here:

http://developer.android.com/reference/java/text/SimpleDateFormat.html

Some great news! Since version 3.6 the cPython implementation has preserved the insertion order of dictionaries (https://mail.python.org/pipermail/python-dev/2016-September/146327.html). This means that the json library is now order preserving by default. Observe the difference in behaviour between python 3.5 and 3.6. The code:

import json
data = json.loads('{"foo":1, "bar":2, "fiddle":{"bar":2, "foo":1}}')
print(json.dumps(data, indent=4))

In py3.5 the resulting order is undefined:

{
    "fiddle": {
        "bar": 2,
        "foo": 1
    },
    "bar": 2,
    "foo": 1
}

In the cPython implementation of python 3.6:

{
    "foo": 1,
    "bar": 2,
    "fiddle": {
        "bar": 2,
        "foo": 1
    }
}

The really great news is that this has become a language specification as of python 3.7 (as opposed to an implementation detail of cPython 3.6+): https://mail.python.org/pipermail/python-dev/2017-December/151283.html

So the answer to your question now becomes: upgrade to python 3.6! :)

Here is a nice explanation of update operation with some examples. Although it is Postgres site, but the SQL queries are valid for the other DBs, too. The following examples are intuitive to understand.

-- Update contact names in an accounts table to match the currently assigned salesmen:

UPDATE accounts SET (contact_first_name, contact_last_name) =
    (SELECT first_name, last_name FROM salesmen
     WHERE salesmen.id = accounts.sales_id);

-- A similar result could be accomplished with a join:

UPDATE accounts SET contact_first_name = first_name,
                    contact_last_name = last_name
  FROM salesmen WHERE salesmen.id = accounts.sales_id;

However, the second query may give unexpected results if salesmen.id is not a unique key, whereas the first query is guaranteed to raise an error if there are multiple id matches. Also, if there is no match for a particular accounts.sales_id entry, the first query will set the corresponding name fields to NULL, whereas the second query will not update that row at all.

Hence for the given example, the most reliable query is like the following.

UPDATE tempDataView SET (marks) =
    (SELECT marks FROM tempData
     WHERE tempDataView.Name = tempData.Name);

No - it doesn't matter in the slightest. On NT the .bat and .cmd extension both cause the cmd.exe processor to process the file in exactly the same way.

Additional interesting information about command.com vs. cmd.exe on WinNT-class systems from MS TechNet (http://technet.microsoft.com/en-us/library/cc723564.aspx):

This behavior reveals a quite subtle feature of Windows NT that is very important. The 16-bit MS-DOS shell (COMMAND.COM) that ships with Windows NT is specially designed for Windows NT. When a command is entered for execution by this shell, it does not actually execute it. Instead, it packages the command text and sends it to a 32-bit CMD.EXE command shell for execution. Because all commands are actually executed by CMD.EXE (the Windows NT command shell), the 16-bit shell inherits all the features and facilities of the full Windows NT shell.

$host = $_SERVER['HTTP_HOST'];
preg_match("/[^\.\/]+\.[^\.\/]+$/", $host, $matches);
$domain = $matches[0];
$url = explode($domain, $host);
$subdomain = str_replace('.', '', $url[0]);

echo 'subdomain: '.$subdomain.'<br />';
echo 'domain: '.$domain.'<br />';

For the people who are using node project manager, also this line adding to package.json will be enough. For angular CLI users, mast3rd3mon's answer is true.

You can add

"server": "webpack-dev-server --inline --progress --host 0.0.0.0 --port 3000"

to package.json

If you don't want to use any libraries and you have reoccurrences in your data, you can use which with sapply as well.

new_order <- sapply(target, function(x,df){which(df$name == x)}, df=df)
df        <- df[new_order,]

mongoose.connect('mongodb://localhost:27017/').then(() => {
console.log("Connected to Database");
}).catch((err) => {
console.log("Not Connected to Database ERROR! ", err);
});

Better just connect to the localhost Mongoose Database only and create your own collections. Don't forget to mention the port number. (Default: 27017)

For the best view, download Mongoose-compass for MongoDB UI.

I realize this is pretty late, but I had a similar problem and I figured I'd post what worked for me. I used the iconv utility (e.g., "iconv file.pcl -f UTF-8 -t ISO-8859-1 -c"). The "-c" option skips characters that can't be translated.

406 - Not Acceptable

Which means this response is sent when the web server, after performing server-driven content negotiation, doesn't find any content that conforms to the criteria given by the user agent.

the year function dose, like this:

select year(date_column) from table_name

Just wanted to mention, that you also may have to set the https_proxy OS environment variable in case https URLs need to be accessed. In my case it was not obvious to me and I tried for hours to discover this.

My use case: Win 7, jython-standalone-2.5.3.jar, setuptools installation via ez_setup.py

I think you want to change the setting called "DropDownStyle" to be "DropDownList".

For IEEE802.3, CRC-32. Think of the entire message as a serial bit stream, append 32 zeros to the end of the message. Next, you MUST reverse the bits of EVERY byte of the message and do a 1's complement the first 32 bits. Now divide by the CRC-32 polynomial, 0x104C11DB7. Finally, you must 1's complement the 32-bit remainder of this division bit-reverse each of the 4 bytes of the remainder. This becomes the 32-bit CRC that is appended to the end of the message.

The reason for this strange procedure is that the first Ethernet implementations would serialize the message one byte at a time and transmit the least significant bit of every byte first. The serial bit stream then went through a serial CRC-32 shift register computation, which was simply complemented and sent out on the wire after the message was completed. The reason for complementing the first 32 bits of the message is so that you don't get an all zero CRC even if the message was all zeros.

Had the same problem. I was passing a non-const reference of custom class and the constructor complained (some tuple template errors). Replaced the reference with pointer and it worked.

You need to add else in your lambda function. Because you are telling what to do in case your condition(here x < 90) is met, but you are not telling what to do in case the condition is not met.

sample['PR'] = sample['PR'].apply(lambda x: 'NaN' if x < 90 else x) 

Pycharm 2020.3.3 CE ZorinOS(Linux) File>Settings > Project Structure > {select the folder} > Mark as Source(blue folder icon) > Apply

To verify:

import sys
print(sys.path)

Selected path should be listed here.

1 Right click on "your project" in Eclipse EE Project Explorer 2 Click on Properties 3 Click on Targeted Runtimes 4 Checkbox of the version you are currently working with 5 Apply and close

This should do the trick.

Connections have a close method as specified in PEP-249 (Python Database API Specification v2.0):

import pyodbc
conn = pyodbc.connect('DRIVER=MySQL ODBC 5.1 driver;SERVER=localhost;DATABASE=spt;UID=who;PWD=testest') 

csr = conn.cursor()  
csr.close()
conn.close()     #<--- Close the connection

Since the pyodbc connection and cursor are both context managers, nowadays it would be more convenient (and preferable) to write this as:

import pyodbc
conn = pyodbc.connect('DRIVER=MySQL ODBC 5.1 driver;SERVER=localhost;DATABASE=spt;UID=who;PWD=testest') 
with conn:
    crs = conn.cursor()
    do_stuff
    # conn.commit() will automatically be called when Python leaves the outer `with` statement
    # Neither crs.close() nor conn.close() will be called upon leaving the `with` statement!! 

See https://github.com/mkleehammer/pyodbc/issues/43 for an explanation for why conn.close() is not called.

Note that unlike the original code, this causes conn.commit() to be called. Use the outer with statement to control when you want commit to be called.

Also note that regardless of whether or not you use the with statements, per the docs,

Connections are automatically closed when they are deleted (typically when they go out of scope) so you should not normally need to call [conn.close()], but you can explicitly close the connection if you wish.

and similarly for cursors (my emphasis):

Cursors are closed automatically when they are deleted (typically when they go out of scope), so calling [csr.close()] is not usually necessary.

try this one ,

n=int(raw_input("Enter length of the list"))
l1=[]
for i in range(n):
    a=raw_input()
    if(a.isdigit()):
        l1.insert(i,float(a)) #statement1
    else:
        l1.insert(i,a)        #statement2

If the element of the list is just a number the statement 1 will get executed and if it is a string then statement 2 will be executed. In the end you will have an list l1 as you needed.

You can use both .content and .container to overflow:auto. Means if it's text is exceed automatically scroll will come x-axis and y-axis. (no need to give separete x-axis and y-axis commonly give overflow:auto)

.content {overflow:auto;}

Check this: How to maximize a plt.show() window using Python

The command is different depending on which backend you use. I find that this is the best way to make sure the saved pictures have the same scaling as what I view on my screen.

Since I use Canopy with the QT backend:

pylab.get_current_fig_manager().window.showMaximized()

I then call savefig() as required with an increased DPI per silvado's answer.

does R stop no matter the N value you use? try to use small values and see if it's the mvrnorm function that is the issue or you could simply loop it on subsets. Insert the gc() function in the loop to free some RAM continuously

function invertArray(array,arrayWidth,arrayHeight) {
  var newArray = [];
  for (x=0;x<arrayWidth;x++) {
    newArray[x] = [];
    for (y=0;y<arrayHeight;y++) {
        newArray[x][y] = array[y][x];
    }
  }
  return newArray;
}

Note that if variable is list of lists, some approaches would fail. For example:

v1 = [[range(3)] for x in range(4)]
v2 = v1[:3]+v1[4:] # this fails
v2

For the general case, use

removed_index = 1
v1 = [[range(3)] for x in range(4)]
v2 = [x for i,x in enumerate(v1) if x!=removed_index]
v2

Other posters gave some examples for situations in which you'd use daemon threads. My recommendation, however, is never to use them.

It's not because they're not useful, but because there are some bad side effects you can experience if you use them. Daemon threads can still execute after the Python runtime starts tearing down things in the main thread, causing some pretty bizarre exceptions.

More info here:

https://joeshaw.org/python-daemon-threads-considered-harmful/

https://mail.python.org/pipermail/python-list/2005-February/343697.html

Strictly speaking you never need them, it just makes implementation easier in some cases.

So to recap your question: you want to avoid, as much as possible, trouble with the IE6 GC bug. That bug has two causes:

1. Garbage Collection occurs once every so many allocations; therefore, the more allocations you make, the oftener GC will run;
2. The more objects you've got ‘in the air’, the more time each Garbage Collection run takes (since it'll crawl through the entire list of objects to see which are marked as garbage).

The solution to cause 1 seems to be: keep the number of allocations down; assign new objects and strings as little as possible.

The solution to cause 2 seems to be: keep the number of 'live' objects down; delete your strings and objects as soon as you don't need them anymore, and create them afresh when necessary.

To a certain extent, these solutions are contradictory: to keep the number of objects in memory low will entail more allocations and de-allocations. Conversely, constantly reusing the same objects could mean keeping more objects in memory than strictly necessary.

Now for your question. Whether you'll reset an object by creating a new one, or by deleting all its properties: that will depend on what you want to do with it afterwards.

You’ll probably want to assign new properties to it:

• If you do so immediately, then I suggest assigning the new properties straightaway, and skip deleting or clearing first. (Make sure that all properties are either overwritten or deleted, though!)
• If the object won't be used immediately, but will be repopulated at some later stage, then I suggest deleting it or assigning it null, and create a new one later on.

There's no fast, easy to use way to clear a JScript object for reuse as if it were a new object — without creating a new one. Which means the short answer to your question is ‘No’, like jthompson says.

While moopasta's answer works, it doesn't appear to allow wildcards and there is another (potentially better) option. The Chromium project has some HTTP authentication documentation that is useful but incomplete.

Specifically the option that I found best is to whitelist sites that you would like to allow Chrome to pass authentication information to, you can do this by:

• Launching Chrome with the auth-server-whitelist command line switch. e.g. --auth-server-whitelist="*example.com,*foobar.com,*baz". Downfall to this approach is that opening links from other programs will launch Chrome without the command line switch.
• Installing, enabling, and configuring the AuthServerWhitelist/"Authentication server whitelist" Group Policy or Local Group Policy. This seems like the most stable option but takes more work to setup. You can set this up locally, no need to have this remotely deployed.

Those looking to set this up for an enterprise can likely follow the directions for using Group Policy or the Admin console to configure the AuthServerWhitelist policy. Those looking to set this up for one machine only can also follow the Group Policy instructions:

1. Download and unzip the latest Chrome policy templates
2. Start > Run > gpedit.msc
3. Navigate to Local Computer Policy > Computer Configuration > Administrative Templates
4. Right-click Administrative Templates, and select Add/Remove Templates
5. Add the windows\adm\en-US\chrome.adm template via the dialog
6. In Computer Configuration > Administrative Templates > Classic Administrative Templates > Google > Google Chrome > Policies for HTTP Authentication enable and configure Authentication server whitelist
7. Restart Chrome and navigate to chrome://policy to view active policies

If you already know size of the char*, use this instead

char* data = ...;
int size = ...;
std::string myString(data, size);

This doesn't use strlen.

EDIT: If string variable already exists, use assign():

std::string myString;
char* data = ...;
int size = ...;
myString.assign(data, size);

Cascading Style Sheet are designed for inheritance. Inheritance is intrinsic to their existence. If it wasn't built to be cascading, they would only be called "Style Sheets".

That said, if an inherited style doesn't fit your needs, you'll have to override it with another style closer to the object. Forget about the notion of "blocking inheritance".

You can also choose the more granular solution by giving styles to every individual objects, and not giving styles to the general tags like div, p, pre, etc.

For example, you can use styles that start with # for objects with a specific ID:

<style>
#dividstyle{
    font-family:MS Trebuchet;
}
</style>
<div id="dividstyle">Hello world</div>

You can define classes for objects:

<style>
.divclassstyle{
    font-family: Calibri;
}
</style>
<div class="divclassstyle">Hello world</div>

Hope it helps.

Your makefile should ideally be named makefile, not make. Note that you can call your makefile anything you like, but as you found, you then need the -f option with make to specify the name of the makefile. Using the default name of makefile just makes life easier.

In general we use margins on one of the elements, not spacer elements.

I had serious issues with Timezones and such. The way Python handles all that happen to be pretty confusing (to me). Things seem to be working fine using the calendar module (see links 1, 2, 3 and 4).

>>> import datetime
>>> import calendar
>>> aprilFirst=datetime.datetime(2012, 04, 01, 0, 0)
>>> calendar.timegm(aprilFirst.timetuple())
1333238400

Or you can look at schemacrawler

My comment might not be relevant to the tags given. However, I was lead to this page from my search. I was looking for similar check in R and I came up the following with the help of @hugovdbeg post. I hope it would be helpful for someone who is looking for similar solution in R

'USERNAME' %in% names(Sys.getenv())

I know this question is already answered, a long time ago, but this is for other people that may end up here and are having trouble finding what they need. I had trouble finding an existing plugin that did exactly what I needed, so I wrote my own jQuery UI plugin to accomplish this task. It's based on the combobox example on the jQuery UI site. Hopefully it might help someone.

https://github.com/tmooney3979/jquery.ui.combify

People need to put down the gun, step away from the ledge, and think for a minute. It turns out there are objective, concrete, and undeniable advantages to DVCS that will make a HUGE difference in a team's productivity.

It all comes down to Branching and Merging.

Before DVCS, the guiding principle was "Pray to God that you don't have to get into branching and merging. And if you do, at least beg Him to let it be very, very simple."

Now, with DVCS, branching (and merging) is so much improved, the guiding principle is, "Do it at the drop of a hat. It will give you a ton of benefits and not cause you any problems."

And that is a HUGE productivity booster for any team.

The problem is, for people to understand what I just said and be convinced that it is true, they have to first invest in a little bit of a learning curve. They don't have to learn Git or any other DVCS itself ... they just need to learn how Git does branching and merging. Read and re-read some articles and blog posts, taking it slow, and working through it until you see it. That might take the better part of 2 or 3 full days.

But once you see that, you won't even consider choosing a non-DVCS. Because there really are clear, objective, concrete advantages to DVCS, and the biggest wins are in the area of branching and merging.

In my case, I had to close R session and reinstall all packages. In that session I worked with large tables, I suspect this might have had the effect.

Client send some messages need be compressed, server (kafka) decompress the string meesage

Below is my sample:

compress:

   public static String compress(String str, String inEncoding) {
        if (str == null || str.length() == 0) {
            return str;
        }
        try {
            ByteArrayOutputStream out = new ByteArrayOutputStream();
            GZIPOutputStream gzip = new GZIPOutputStream(out);
            gzip.write(str.getBytes(inEncoding));
            gzip.close();
            return URLEncoder.encode(out.toString("ISO-8859-1"), "UTF-8");
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }

decompress:

    public static String decompress(String str, String outEncoding) {
        if (str == null || str.length() == 0) {
            return str;
        }

        try {
            String decode = URLDecoder.decode(str, "UTF-8");

            ByteArrayOutputStream out = new ByteArrayOutputStream();
            ByteArrayInputStream in = new ByteArrayInputStream(decode.getBytes("ISO-8859-1"));
            GZIPInputStream gunzip = new GZIPInputStream(in);
            byte[] buffer = new byte[256];
            int n;
            while ((n = gunzip.read(buffer)) >= 0) {
                out.write(buffer, 0, n);
            }
            return out.toString(outEncoding);
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }

The first is better. If you try to debug the second and look at the call stack you won't see where the original exception came from. There are tricks to keep the call-stack intact (try search, it's been answered before) if you really need to rethrow.

I have an application that I am developing that is laid out similar with Tabs in the Action Bar that launches fragments, some of these Fragments have multiple embedded Fragments within them.

I was getting the same error when I tried to run the application. It seems like if you instantiate the Fragments within the xml layout after a tab was unselected and then reselected I would get the inflator error.

I solved this replacing all the fragments in xml with Linearlayouts and then useing a Fragment manager/ fragment transaction to instantiate the fragments everything seems to working correctly at least on a test level right now.

I hope this helps you out.

Old question but nowadays CSS3 makes vertical alignment really simple!

Just add to #abc the following css:

display:flex;
align-items:center;

Simple Demo

Original question demo updated

Simple Example:

.vertical-align-content {_x000D_
  background-color:#f18c16;_x000D_
  height:150px;_x000D_
  display:flex;_x000D_
  align-items:center;_x000D_
  /* Uncomment next line to get horizontal align also */_x000D_
  /* justify-content:center; */_x000D_
}

<div class="vertical-align-content">_x000D_
  Hodor!_x000D_
</div>

Well, you can use while loop, like this,

import java.util.Scanner;

public class DecimalToBinaryExample
{
    public static void main(String[] args)
    {
        int num;
        int a = 0;
        Scanner sc = new Scanner(System.in);
        System.out.println("Please enter a decimal number : ");
        num = sc.nextInt();
        int binary[] = new int[100];

        while(num != 0)
        {
            binary[a] = num % 2;
            num = num / 2;
            a++;
        }

        System.out.println("The binary value is : ");
        for(int b = a - 1; b >= 0; b--)
        {
            System.out.println("" + binary[b]);
        }
        sc.close();
    }
}

You can refer example below for some good explanation,

convert decimal to binary example.

NOTICE that append generates a new slice if cap is not sufficient. @kostix's answer is correct, or you can pass slice argument by pointer!

You need to install the Lombok plugin for IDEA. Open the Settings panel (Ctrl + Alt + S). Search for "Plugins", then search for "Lombok" in the plugins. Find the plugin and install it. Finally, restart your IDEA. Then everything will be OK!

if you want infos from the actual running batchfile, try this :

@echo off
set myNameFull=%0
echo myNameFull     %myNameFull%
set myNameShort=%~n0
echo myNameShort    %myNameShort%
set myNameLong=%~nx0
echo myNameLong     %myNameLong%
set myPath=%~dp0
echo myPath         %myPath%
set myLogfileWpath=%myPath%%myNameShort%.log
echo myLogfileWpath %myLogfileWpath%

more samples? C:> HELP CALL

%0 = parameter 0 = batchfile %1 = parameter 1 - 1st par. passed to batchfile... so you can try that stuff (e.g. "~dp") between 1st (e.g. "%") and last (e.g. "1") also for parameters

This will do the trick

.gallery-item
{
  opacity:1;
}

.gallery-item:hover
{
  opacity:0;
  transition: opacity .2s ease-out;
  -moz-transition: opacity .2s ease-out;
  -webkit-transition: opacity .2s ease-out;
  -o-transition: opacity .2s ease-out;
}

You can also create a shortcut with an empty filename

"%LOCALAPPDATA%\Local\Code\Code.exe" ""

You can write a simple gradle script to print your GRADLE_HOME directory.

task getHomeDir {
    doLast {
        println gradle.gradleHomeDir
    }
}

and name it build.gradle.

Then run it with:

gradle getHomeDir

If you installed with homebrew, use brew info gradle to find the base path (i.e. /usr/local/Cellar/gradle/1.10/), and just append libexec.

The same task in Kotlin in case you use build.gradle.kts:

tasks.register("getHomeDir") {
    println("Gradle home dir: ${gradle.gradleHomeDir}")
}

In View:

<Button
 Height="50" Width="50"
 Style="{StaticResource MyButtonStyle}"
 Command="{Binding SmallDisp}" CommandParameter="{Binding}" 
Cursor="Hand" Visibility="{Binding Path=AdvancedFormat}"/>

In view Model:

public _advancedFormat = Visibility.visible (whatever you start with)

public Visibility AdvancedFormat
{
 get{return _advancedFormat;}
 set{
   _advancedFormat = value;
   //raise property changed here
}

You will need to have a property changed event

 protected virtual void OnPropertyChanged(PropertyChangedEventArgs e) 
    { 
        PropertyChanged.Raise(this, e); 
    } 

    protected void OnPropertyChanged(string propertyName) 
    { 
        OnPropertyChanged(new PropertyChangedEventArgs(propertyName)); 
    } 

This is how they use Model-view-viewmodel

But since you want it binded to a boolean, You will need some converter. Another way is to set a boolean outside and when that button is clicked then set the property_advancedFormat to your desired visibility.

The problem may be that ssh is trying to connect to all the different IPs that www.google.com resolves to. For example on my machine:

# ssh -v -o ConnectTimeout=1 -o ConnectionAttempts=1 www.google.com
OpenSSH_5.9p1, OpenSSL 0.9.8t 18 Jan 2012
debug1: Connecting to www.google.com [173.194.43.20] port 22.
debug1: connect to address 173.194.43.20 port 22: Connection timed out
debug1: Connecting to www.google.com [173.194.43.19] port 22.
debug1: connect to address 173.194.43.19 port 22: Connection timed out
debug1: Connecting to www.google.com [173.194.43.18] port 22.
debug1: connect to address 173.194.43.18 port 22: Connection timed out
debug1: Connecting to www.google.com [173.194.43.17] port 22.
debug1: connect to address 173.194.43.17 port 22: Connection timed out
debug1: Connecting to www.google.com [173.194.43.16] port 22.
debug1: connect to address 173.194.43.16 port 22: Connection timed out
ssh: connect to host www.google.com port 22: Connection timed out

If I run it with a specific IP, it returns much faster.

EDIT: I've timed it (with time) and the results are:

• www.google.com - 5.086 seconds
• 173.94.43.16 - 1.054 seconds

Since id is an attribute don't create an id element, just do this:

myPara.setAttribute("id", "id_you_like");

Make sure you aren't trying to use the same User object more than once while changing the ID. In other words, if you were doing something in a batch type operation:

User user = new User();  // Using the same one over and over, won't work
List<Customer> customers = fetchCustomersFromSomeService();
for(Customer customer : customers) {
 // User user = new User(); <-- This would work, you get a new one each time
 user.setId(customer.getId());
 user.setName(customer.getName());
 saveUserToDB(user);
}

Try this:

Declare @DayOfMonth TinyInt Set @DayOfMonth = 13
Declare @Month TinyInt Set @Month = 6
Declare @Year Integer Set @Year = 2006
-- ------------------------------------
Select DateAdd(day, @DayOfMonth - 1, 
          DateAdd(month, @Month - 1, 
              DateAdd(Year, @Year-1900, 0)))

It works as well, has added benefit of not doing any string conversions, so it's pure arithmetic processing (very fast) and it's not dependent on any date format This capitalizes on the fact that SQL Server's internal representation for datetime and smalldatetime values is a two part value the first part of which is an integer representing the number of days since 1 Jan 1900, and the second part is a decimal fraction representing the fractional portion of one day (for the time) --- So the integer value 0 (zero) always translates directly into Midnight morning of 1 Jan 1900...

or, thanks to suggestion from @brinary,

Select DateAdd(yy, @Year-1900,  
       DateAdd(m,  @Month - 1, @DayOfMonth - 1)) 

Edited October 2014. As Noted by @cade Roux, SQL 2012 now has a built-in function:
DATEFROMPARTS(year, month, day)
that does the same thing.

Edited 3 Oct 2016, (Thanks to @bambams for noticing this, and @brinary for fixing it), The last solution, proposed by @brinary. does not appear to work for leap years unless years addition is performed first

select dateadd(month, @Month - 1, 
     dateadd(year, @Year-1900, @DayOfMonth - 1)); 

This appears to be missing the providerName="System.Data.EntityClient" bit. Sure you got the whole thing?

type='Submit' is set to forward & get the values on BACK-END (PHP, .NET etc). type='button' will reflect normal button behavior.

Here's what worked for me: right click the project-> source -> format After that just drag and drop the source folder into eclipse under the project and select link.

good luck!

Try this to get all the list at first, then your desired element (say the First in your case):

var desiredElementCompoundValueList = new List<YourType>();
dic.Values.ToList().ForEach( elem => 
{
   desiredElementCompoundValue.Add(elem.ComponentValue("Dep"));
});
var x = desiredElementCompoundValueList.FirstOrDefault();

To get directly the first element value without a lot of foreach iteration and variable assignment:

var desiredCompoundValue = dic.Values.ToList().Select( elem => elem.CompoundValue("Dep")).FirstOrDefault();

See the difference between the two approaches: in the first one you get the list through a ForEach, then your element. In the second you can get your value in a straight way.

Same result, different computation ;)

If the structs only contain primitives or if you are interested in strict equality then you can do something like this:

int my_struct_cmp(const struct my_struct * lhs, const struct my_struct * rhs)
{
    return memcmp(lhs, rsh, sizeof(struct my_struct));
}

However, if your structs contain pointers to other structs or unions then you will need to write a function that compares the primitives properly and make comparison calls against the other structures as appropriate.

Be aware, however, that you should have used memset(&a, sizeof(struct my_struct), 1) to zero out the memory range of the structures as part of your ADT initialization.

this is my code max=100, min=0

xml

<TextView
                    android:id="@+id/txt_Mass_smallWork"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:textColor="#000"
                    android:textSize="20sp"
                    android:textStyle="bold" />

java

EditText ed = findViewById(R.id.txt_Mass_smallWork);
    ed.addTextChangedListener(new TextWatcher() {
        @Override
        public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {`

        }

        @Override
        public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
            if(!charSequence.equals("")) {
                int massValue = Integer.parseInt(charSequence.toString());
                if (massValue > 10) {
                    ed.setFilters(new InputFilter[]{new InputFilter.LengthFilter(2)});
                } else {
                    ed.setFilters(new InputFilter[]{new InputFilter.LengthFilter(3)});
                }
            }
        }

        @Override
        public void afterTextChanged(Editable editable) {

        }
    });

You are the 742342nd user to ask this bash FAQ. The answer also describes the general case of variables set in subshells created by pipes:

E4) If I pipe the output of a command into read variable, why doesn't the output show up in $variable when the read command finishes?

This has to do with the parent-child relationship between Unix processes. It affects all commands run in pipelines, not just simple calls to read. For example, piping a command's output into a while loop that repeatedly calls read will result in the same behavior.

Each element of a pipeline, even a builtin or shell function, runs in a separate process, a child of the shell running the pipeline. A subprocess cannot affect its parent's environment. When the read command sets the variable to the input, that variable is set only in the subshell, not the parent shell. When the subshell exits, the value of the variable is lost.

Many pipelines that end with read variable can be converted into command substitutions, which will capture the output of a specified command. The output can then be assigned to a variable:

grep ^gnu /usr/lib/news/active | wc -l | read ngroup

can be converted into

ngroup=$(grep ^gnu /usr/lib/news/active | wc -l)

This does not, unfortunately, work to split the text among multiple variables, as read does when given multiple variable arguments. If you need to do this, you can either use the command substitution above to read the output into a variable and chop up the variable using the bash pattern removal expansion operators or use some variant of the following approach.

Say /usr/local/bin/ipaddr is the following shell script:

#! /bin/sh
host `hostname` | awk '/address/ {print $NF}'

Instead of using

/usr/local/bin/ipaddr | read A B C D

to break the local machine's IP address into separate octets, use

OIFS="$IFS"
IFS=.
set -- $(/usr/local/bin/ipaddr)
IFS="$OIFS"
A="$1" B="$2" C="$3" D="$4"

Beware, however, that this will change the shell's positional parameters. If you need them, you should save them before doing this.

This is the general approach -- in most cases you will not need to set $IFS to a different value.

Some other user-supplied alternatives include:

read A B C D << HERE
    $(IFS=.; echo $(/usr/local/bin/ipaddr))
HERE

and, where process substitution is available,

read A B C D < <(IFS=.; echo $(/usr/local/bin/ipaddr))

i faced this issue but i was able to correct this issue by renaming the controller, please have a try on it.

ctrlSub.execSummaryDocuments = function(){};

CTRL+F5 Reloads the current page, ignoring cached content and generating the expected result.

This works for me on Xcode 6 & 5.

- (BOOL)shouldAutorotate {
    return YES;
}
- (NSUInteger)supportedInterfaceOrientations {
    return (UIInterfaceOrientationMaskPortrait);
}

The following query produces a(nother) query that will get the value of count(*) for every table, from every schema, listed in information_schema.tables. The entire result of the query shown here - all rows taken together - comprise a valid SQL statement ending in a semicolon - no dangling 'union'. The dangling union is avoided by use of a union in the query below.

select concat('select "', table_schema, '.', table_name, '" as `schema.table`,
                          count(*)
                 from ', table_schema, '.', table_name, ' union ') as 'Query Row'
  from information_schema.tables
 union
 select '(select null, null limit 0);';

You can do this to only monitor own properties of the object:

var arr = [];

for (var key in p) {
    if (p.hasOwnProperty(key)) {
        arr.push(p[key]);
    }
}

This actually sums it up pretty nicely.

API Levels generally mean that as a programmer, you can communicate with the devices' built in functions and functionality. As the API level increases, functionality adds up (although some of it can get deprecated).

Choosing an API level for an application development should take at least two thing into account:

1. Current distribution - How many devices can actually support my application, if it was developed for API level 9, it cannot run on API level 8 and below, then "only" around 60% of devices can run it (true to the date this post was made).
2. Choosing a lower API level may support more devices but gain less functionality for your app. you may also work harder to achieve features you could've easily gained if you chose higher API level.

Android API levels can be divided to five main groups (not scientific, but what the heck):

1. Android 1.5 - 2.3 (Cupcake to Gingerbread) - (API levels 3-10) - Android made specifically for smartphones.
2. Android 3.0 - 3.2 (Honeycomb) (API levels 11-13) - Android made for tablets.
3. Android 4.0 - 4.4 (KitKat) - (API levels 14-19) - A big merge with tons of additional functionality, totally revamped Android version, for both phone and tablets.
4. Android 5.0 - 5.1 (Lollipop) - (API levels 21-22) - Material Design introduced.
5. Android 6.0 - 6.… (Marshmallow) - (API levels 23-…) - Runtime Permissions,Apache HTTP Client Removed

If worse comes to worse, you can create an interface and adapter pair. You would change all uses of ConcreteClass to use the interface instead, and always pass the adapter instead of the concrete class in production code.

The adapter implements the interface, so the mock can also implement the interface.

It's more scaffolding than just making a method virtual or just adding an interface, but if you don't have access to the source for the concrete class it can get you out of a bind.

If this is a BAT file in a different directory than the current directory, you may see an error like "python: can't open file 'somescript.py': [Errno 2] No such file or directory". This can be fixed by specifying an absolute path to the BAT file using %~dp0 (the drive letter and path of that batch file).

@echo off
python %~dp0\somescript.py %*

(This way you can ignore the c:\ or whatever, because perhaps you may want to move this script)

One way of doing this is via an exists clause:

select * from genes g
where exists
(select null from genes g1
 where g.locus = g1.locus and g.chromosome = g1.chromosome and g.id <> g1.id)

Alternatively, in MySQL you can get a summary of all matching ids with a single table access, using group_concat:

select group_concat(id) matching_ids, chromosome, locus 
from genes
group by chromosome, locus
having count(*) > 1

You would need an HTTP module that looked at the requested resource and if it was a css or js, it would tack on the Access-Control-Allow-Origin header with the requestors URL, unless you want it wide open with '*'.

spell corrector->

you need to import a corpus on to your desktop if you store elsewhere change the path in the code i have added a few graphics as well using tkinter and this is only to tackle non word errors!!

def min_edit_dist(word1,word2):
    len_1=len(word1)
    len_2=len(word2)
    x = [[0]*(len_2+1) for _ in range(len_1+1)]#the matrix whose last element ->edit distance
    for i in range(0,len_1+1):  
        #initialization of base case values
        x[i][0]=i
        for j in range(0,len_2+1):
            x[0][j]=j
    for i in range (1,len_1+1):
        for j in range(1,len_2+1):
            if word1[i-1]==word2[j-1]:
                x[i][j] = x[i-1][j-1]
            else :
                x[i][j]= min(x[i][j-1],x[i-1][j],x[i-1][j-1])+1
    return x[i][j]
from Tkinter import *


def retrieve_text():
    global word1
    word1=(app_entry.get())
    path="C:\Documents and Settings\Owner\Desktop\Dictionary.txt"
    ffile=open(path,'r')
    lines=ffile.readlines()
    distance_list=[]
    print "Suggestions coming right up count till 10"
    for i in range(0,58109):
        dist=min_edit_dist(word1,lines[i])
        distance_list.append(dist)
    for j in range(0,58109):
        if distance_list[j]<=2:
            print lines[j]
            print" "   
    ffile.close()
if __name__ == "__main__":
    app_win = Tk()
    app_win.title("spell")
    app_label = Label(app_win, text="Enter the incorrect word")
    app_label.pack()
    app_entry = Entry(app_win)
    app_entry.pack()
    app_button = Button(app_win, text="Get Suggestions", command=retrieve_text)
    app_button.pack()
    # Initialize GUI loop
    app_win.mainloop()

There isn’t really an ideal conversion, but I would like to supply a couple of options.

java.time

First, you should use LocalDate from java.time, the modern Java date and time API, for parsing and holding your date. Avoid Date and SimpleDateFormat since they have design problems and also are long outdated. The latter in particular is notoriously troublesome.

    DateTimeFormatter originalDateFormatter = DateTimeFormatter.ofPattern("dd/MM/uuuu");

    String dateString = "13/06/1983";
    LocalDate date = LocalDate.parse(dateString, originalDateFormatter);
    System.out.println(date);

The output is:

1983-06-13

Do you need to go any further? LocalDate.toString() produces the format you asked about.

Format and parse

Assuming that you do require an XMLGregorianCalendar the first and easy option for converting is:

    XMLGregorianCalendar xmlDate = DatatypeFactory.newInstance()
            .newXMLGregorianCalendar(date.toString());
    System.out.println(xmlDate);

1983-06-13

Formatting to a string and parsing it back feels like a waste to me, but as I said, it’s easy and I don’t think that there are any surprises about the result being as expected.

Pass year, month and day of month individually

    XMLGregorianCalendar xmlDate = DatatypeFactory.newInstance()
            .newXMLGregorianCalendarDate(date.getYear(), date.getMonthValue(),
                    date.getDayOfMonth(), DatatypeConstants.FIELD_UNDEFINED);

The result is the same as before. We need to make explicit that we don’t want a time zone offset (this is what DatatypeConstants.FIELD_UNDEFINED specifies). In case someone is wondering, both LocalDate and XMLGregorianCalendar number months the way humans do, so there is no adding or subtracting 1.

Convert through GregorianCalendar

I only show you this option because I somehow consider it the official way: convert LocalDate to ZonedDateTime, then to GregorianCalendar and finally to XMLGregorianCalendar.

    ZonedDateTime dateTime = date.atStartOfDay(ZoneOffset.UTC);
    GregorianCalendar gregCal = GregorianCalendar.from(dateTime);
    XMLGregorianCalendar xmlDate = DatatypeFactory.newInstance()
            .newXMLGregorianCalendar(gregCal);
    xmlDate.setTime(DatatypeConstants.FIELD_UNDEFINED, DatatypeConstants.FIELD_UNDEFINED,
            DatatypeConstants.FIELD_UNDEFINED, DatatypeConstants.FIELD_UNDEFINED);
    xmlDate.setTimezone(DatatypeConstants.FIELD_UNDEFINED);

I like the conversion itself since we neither need to use strings nor need to pass individual fields (with care to do it in the right order). What I don’t like is that we have to pass a time of day and a time zone offset and then wipe out those fields manually afterwards.

I use UltraEdit to edit large files. The maximum size I open with UltraEdit was about 2.5 GB. Also UltraEdit has a good hex editor in comparison to Notepad++.

Here you can simply use:

SendKeys "{ENTER}" at the end of code linked to the Username field.

And so you can skip pressing ENTER Key once (one time).
And as a result, the next button ("Log In" button here) will be activated. And when you press ENTER once (your desired outcome), It will run code which is linked with "Log In" button.

select right ('00'+ltrim(str( <number> )),2 )

Html.CheckBoxFor expects a Func<TModel, bool> as the first parameter. Therefore your lambda must return a bool, you are currently returning an instance of List<Checkboxes>:

model => model.EmploymentType

You need to iterate over the List<Checkboxes> to output each checkbox:

@for (int i = 0; i < Model.EmploymentType.Count; i++)
{
    @Html.HiddenFor(m => m.EmploymentType[i].Text)
    @Html.CheckBoxFor(m => m.EmploymentType[i].Checked, 
              new { id = string.Format("employmentType_{0}", i) })
}

Somehow the best answer doesn't work for me. I need to use a slightly different code instead.

ClassLoader loader = Thread.currentThread().getContextClassLoader();
InputStream is = loader.getResourceAsStream("SomeTextFile.txt");

I hope this help those who encounters the same issue.

In the current order? I'd say array_slice(). Since it's a built in function it will be faster than looping through the array while keeping track of an incrementing index until N.

If there is space between the letters of the font, you need to use quote.

font-family:"Calibri (Body)";

Please try using following way.

@Html.Hidden("hdnFlag",(object) Convert.ToInt32(ViewBag.page_Count))

Read two integers from the user. Then compute/display the remainder and quotient,

// When the larger integer is divided by the smaller integer
Console.WriteLine("Enter integer 1 please :");
double a5 = double.Parse(Console.ReadLine());
Console.WriteLine("Enter integer 2 please :");
double b5 = double.Parse(Console.ReadLine());

double div = a5 / b5;
Console.WriteLine(div);

double mod = a5 % b5;
Console.WriteLine(mod);

Console.ReadLine();

Pandas concat vs append vs join vs merge

• Concat gives the flexibility to join based on the axis( all rows or all columns)

• Append is the specific case(axis=0, join='outer') of concat

• Join is based on the indexes (set by set_index) on how variable =['left','right','inner','couter']

• Merge is based on any particular column each of the two dataframes, this columns are variables on like 'left_on', 'right_on', 'on'

Basically, you only need junit.jar on the classpath - and here's a quick way to do it:

1. Make sure you have a source folder (e.g. test) marked as a Test Root.

2. Create a test, for example like this:

   public class MyClassTest {
       @Test
       public void testSomething() {
   
       }
   }
   

3. Since you haven't configured junit.jar (yet), the @Test annotation will be marked as an error (red), hit f2 to navigate to it.

4. Hit alt-enter and choose Add junit.jar to the classpath

There, you're done! Right-click on your test and choose Run 'MyClassTest' to run it and see the test results.

Maven Note: Altervatively, if you're using maven, at step 4 you can instead choose the option Add Maven Dependency..., go to the Search for artifact pane, type junit and take whichever version (e.g. 4.8 or 4.9).

I have MongoDB shell version v3.6.4, below code use mongoclient, It's good for me:

var MongoClient = require('mongodb').MongoClient,
assert = require('assert');
var url = 'mongodb://localhost:27017/video';
MongoClient.connect(url,{ useNewUrlParser: true }, function(err, client) 
{
assert.equal(null, err);
console.log("Successfully connected to server");
var db = client.db('video');
// Find some documents in our collection
db.collection('movies').find({}).toArray(function(err, docs) {
// Print the documents returned
docs.forEach(function(doc) {
console.log(doc.title);
});
// Close the DB
client.close();
});
// Declare success
console.log("Called find()");
 });

The difference between encodeURI() and encodeURIComponent() are exactly 11 characters encoded by encodeURIComponent but not by encodeURI:

I generated this table easily with console.table in Google Chrome with this code:

var arr = [];_x000D_
for(var i=0;i<256;i++) {_x000D_
  var char=String.fromCharCode(i);_x000D_
  if(encodeURI(char)!==encodeURIComponent(char)) {_x000D_
    arr.push({_x000D_
      character:char,_x000D_
      encodeURI:encodeURI(char),_x000D_
      encodeURIComponent:encodeURIComponent(char)_x000D_
    });_x000D_
  }_x000D_
}_x000D_
console.table(arr);

You've got to override your Canvas's paint(Graphics g) method and perform your drawing there. See the paint() documentation.

As it states, the default operation is to clear the canvas, so your call to the canvas' graphics object doesn't perform as you would expect.

As many answers here correctly and clearly point out, you should not generally attempt to loop in pandas, but rather should write vectorized code. But the question remains if you should EVER write loops in pandas, and if so the best way to loop in those situations.

I believe there is at least one general situation where loops are appropriate: when you need to calculate some function that depends on values in other rows in a somewhat complex manner. In this case, the looping code is often simpler, more readable, and less error prone than vectorized code. The looping code might even be faster, too.

I will attempt to show this with an example. Suppose you want to take a cumulative sum of a column, but reset it whenever some other column equals zero:

import pandas as pd
import numpy as np

df = pd.DataFrame( { 'x':[1,2,3,4,5,6], 'y':[1,1,1,0,1,1]  } )

#   x  y  desired_result
#0  1  1               1
#1  2  1               3
#2  3  1               6
#3  4  0               4
#4  5  1               9
#5  6  1              15

This is a good example where you could certainly write one line of pandas to achieve this, although it's not especially readable, especially if you aren't fairly experienced with pandas already:

df.groupby( (df.y==0).cumsum() )['x'].cumsum()

That's going to be fast enough for most situations, although you could also write faster code by avoiding the groupby, but it will likely be even less readable.

Alternatively, what if we write this as a loop? You could do something like the following with numpy:

import numba as nb     

@nb.jit(nopython=True)  # optional
def custom_sum(x,y):
    x_sum = x.copy()
    for i in range(1,len(df)):
        if y[i] > 0: x_sum[i] = x_sum[i-1] + x[i]
    return x_sum

df['desired_result'] = custom_sum( df.x.to_numpy(), df.y.to_numpy() )

Admittedly, there's a bit of overhead there required to convert DataFrame columns to numpy arrays, but the core piece of code is just one line of code that you could read even if you didn't know anything about pandas or numpy:

if y[i] > 0: x_sum[i] = x_sum[i-1] + x[i]

And this code is actually faster than the vectorized code. In some quick tests with 100,000 rows, the above is about 10x faster than the groupby approach. Note that one key to the speed there is numba, which is options. Without the "@nb.jit" line, the looping code is actually about 10x slower than the groupby approach.

Clearly this example is simple enough that you would likely prefer the one line of pandas to writing a loop with its associated overhead. However, there are more complex versions of this problem for which the readability or speed of the numpy/numba loop approach likely makes sense.

You can use following to achieve desired functionality

"%d:%d:d" % (hours, minutes, seconds)

To split a string to an array in awk we use the function split():

 awk '{split($0, a, ":")}'
 #           ^^  ^  ^^^
 #            |  |   |
 #       string  |   delimiter
 #               |
 #               array to store the pieces

If no separator is given, it uses the FS, which defaults to the space:

$ awk '{split($0, a); print a[2]}' <<< "a:b c:d e"
c:d

We can give a separator, for example ::

$ awk '{split($0, a, ":"); print a[2]}' <<< "a:b c:d e"
b c

Which is equivalent to setting it through the FS:

$ awk -F: '{split($0, a); print a[1]}' <<< "a:b c:d e"
b c

In gawk you can also provide the separator as a regexp:

$ awk '{split($0, a, ":*"); print a[2]}' <<< "a:::b c::d e" #note multiple :
b c

And even see what the delimiter was on every step by using its fourth parameter:

$ awk '{split($0, a, ":*", sep); print a[2]; print sep[1]}' <<< "a:::b c::d e"
b c
:::

Let's quote the man page of GNU awk:

split(string, array [, fieldsep [, seps ] ])

Divide string into pieces separated by fieldsep and store the pieces in array and the separator strings in the seps array. The first piece is stored in array[1], the second piece in array[2], and so forth. The string value of the third argument, fieldsep, is a regexp describing where to split string (much as FS can be a regexp describing where to split input records). If fieldsep is omitted, the value of FS is used. split() returns the number of elements created. seps is a gawk extension, with seps[i] being the separator string between array[i] and array[i+1]. If fieldsep is a single space, then any leading whitespace goes into seps[0] and any trailing whitespace goes into seps[n], where n is the return value of split() (i.e., the number of elements in array).