Try this:

 Select 
    Id, 
    Salt, 
    Password, 
    BannedEndDate, 
    (Select Count(*) 
        From LoginFails 
        Where username = '" + LoginModel.Username + "' And IP = '" + Request.ServerVariables["REMOTE_ADDR"] + "')
 From Users 
 Where username = '" + LoginModel.Username + "'

And I recommend you strongly to use parameters in your query to avoid security risks with sql injection attacks!

Hope that helps!

A.) The command is NOT EXISTS, you're missing the 'S'.

B.) Use NOT IN instead

SELECT ip 
  FROM login_log 
  WHERE ip NOT IN (
    SELECT ip
    FROM ip_location
  )
;

$query = mysqli_query('SELECT TABLE_NAME FROM information_schema.TABLES WHERE TABLE_NAME IN ("table1","table2","table3") AND TABLE_SCHEMA="yourschema"');
$tablesExists = array();
while( null!==($row=mysqli_fetch_row($query)) ){
    $tablesExists[] = $row[0];
}

Simpler, shorter, faster: EXISTS.

IF EXISTS (SELECT 1 FROM people p WHERE p.person_id = my_person_id) THEN
  -- do something
END IF;

The query planner can stop at the first row found - as opposed to count(), which will scan all matching rows regardless. Makes a difference with big tables. Hardly matters with a condition on a unique column - only one row qualifies anyway (and there is an index to look it up quickly).

^{Improved with input from @a_horse_with_no_name in the comments below.}

You could even use an empty SELECT list:

IF EXISTS (SELECT FROM people p WHERE p.person_id = my_person_id) THEN ...

Since the SELECT list is not relevant to the outcome of EXISTS. Only the existence of at least one qualifying row matters.

I had some trouble with this - my EntityKey consists of three properties (PK with 3 columns) and I didn't want to check each of the columns because that would be ugly. I thought about a solution that works all time with all entities.

Another reason for this is I don't like to catch UpdateExceptions every time.

A little bit of Reflection is needed to get the values of the key properties.

The code is implemented as an extension to simplify the usage as:

context.EntityExists<MyEntityType>(item);

Have a look:

public static bool EntityExists<T>(this ObjectContext context, T entity)
        where T : EntityObject
    {
        object value;
        var entityKeyValues = new List<KeyValuePair<string, object>>();
        var objectSet = context.CreateObjectSet<T>().EntitySet;
        foreach (var member in objectSet.ElementType.KeyMembers)
        {
            var info = entity.GetType().GetProperty(member.Name);
            var tempValue = info.GetValue(entity, null);
            var pair = new KeyValuePair<string, object>(member.Name, tempValue);
            entityKeyValues.Add(pair);
        }
        var key = new EntityKey(objectSet.EntityContainer.Name + "." + objectSet.Name, entityKeyValues);
        if (context.TryGetObjectByKey(key, out value))
        {
            return value != null;
        }
        return false;
    }

A little simpler than Lars' answer:

something_needs_directory_xxx : xxx/..

and generic rule:

%/.. : ;@mkdir -p $(@D)

No touch-files to clean up or make .PRECIOUS :-)

If you want to see another little generic gmake trick, or if you're interested in non-recursive make with minimal scaffolding, you might care to check out Two more cheap gmake tricks and the other make-related posts in that blog.

NB: this is LINQ to objects, I am not 100% sure if it work in LINQ to entities, and have no time to check it right now. In fact it isn't too difficult to translate it to x in [A, B, C] but you have to check for yourself.

So, instead of Contains as a replacement of the ???? in your code you can use Any which is more LINQ-uish:

// Filter the orders based on the order status
var filteredOrders = from order in orders.Order
                     where new[] { "A", "B", "C" }.Any(s => s == order.StatusCode)
                     select order;

It's the opposite to what you know from SQL this is why it is not so obvious.

Of course, if you prefer fluent syntax here it is:

var filteredOrders = orders.Order.Where(order => new[] {"A", "B", "C"}.Any(s => s == order.StatusCode));

Here we again see one of the LINQ surprises (like Joda-speech which puts select at the end). However it is quite logical in this sense that it checks if at least one of the items (that is any) in a list (set, collection) matches a single value.

EDIT

I want to add the reason that your IF statement seems to not work. When you do an EXISTS on an aggregate, it's always going to be true. It returns a value even if the ID doesn't exist. Sure, it's NULL, but its returning it. Instead, do this:

if exists(select 1 from table where id = 4)

and you'll get to the ELSE portion of your IF statement.

Now, here's a better, set-based solution:

update b
  set code = isnull(a.value, 123)
from #b b
left join (select id, max(value) from #a group by id) a
  on b.id = a.id
where
  b.id = yourid

This has the benefit of being able to run on the entire table rather than individual ids.

Yes it stops execution so this is generally preferable to HAVING COUNT(*) > 0 which often won't.

With EXISTS if you look at the execution plan you will see that the actual number of rows coming out of table1 will not be more than 1 irrespective of number of matching records.

In some circumstances SQL Server can convert the tree for the COUNT query to the same as the one for EXISTS during the simplification phase (with a semi join and no aggregate operator in sight) an example of that is discussed in the comments here.

For more complicated sub trees than shown in the question you may occasionally find the COUNT performs better than EXISTS however. Because the semi join needs only retrieve one row from the sub tree this can encourage a plan with nested loops for that part of the tree - which may not work out optimal in practice.

One other answer I think is worth bringing up here (because I came here with that same problem and this turned out to be the answer for me):

Double check that the table name in your query is spelled exactly the same as it is in the database.

Kind of an obvious, newbie thing, but things like "user" vs "users" can trip people up and I thought it would be a helpful answer to have in the list here. :)

Just in case it helps someone, here's what caused this error for me: I needed a procedure to return json but I left out the for json path:

set @jsonout = (SELECT ID, SumLev, Census_GEOID, AreaName, Worksite 
            from CS_GEO G (nolock) 
                join @allids a on g.ID = a.[value] 
            where g.Worksite = @worksite)

When I tried to save the stored procedure, it threw the error. I fixed it by adding for json path to the code at the end of the procedure:

set @jsonout = (SELECT ID, SumLev, Census_GEOID, AreaName, Worksite 
            from CS_GEO G (nolock) 
                join @allids a on g.ID = a.[value] 
            where g.Worksite = @worksite for json path)

Given your updated question, these are the simplest forms:

If ProductID is unique you want

SELECT COUNT(*) FROM Products WHERE ProductID IN (1, 10, 100)

and then check that result against 3, the number of products you're querying (this last part can be done in SQL, but it may be easier to do it in C# unless you're doing even more in SQL).

If ProductID is not unique it is

SELECT COUNT(DISTINCT ProductID) FROM Products WHERE ProductID IN (1, 10, 100)

When the question was thought to require returning rows when all ProductIds are present and none otherwise:

SELECT ProductId FROM Products WHERE ProductID IN (1, 10, 100) AND ((SELECT COUNT(*) FROM Products WHERE ProductID IN (1, 10, 100))=3)

or

SELECT ProductId FROM Products WHERE ProductID IN (1, 10, 100) AND ((SELECT COUNT(DISTINCT ProductID) FROM Products WHERE ProductID IN (1, 10, 100))=3)

if you actually intend to do something with the results. Otherwise the simple SELECT 1 WHERE (SELECT ...)=3 will do as other answers have stated or implied.

Firstly update it. If affected row count = 0 then insert it. Its the easiest and suitable for all RDBMS.

A simple way to check if an element exist can be done through one-line code of jQuery.

Here is the code below:

if ($('#elementId').length > 0) {
    // Do stuff here if the element exists
} else {
    // Do stuff here if the element does not exist
}

Use CASE:

SELECT 
  TABEL1.Id, 
  CASE WHEN EXISTS (SELECT Id FROM TABLE2 WHERE TABLE2.ID = TABLE1.ID)
       THEN 'TRUE' 
       ELSE 'FALSE'
  END AS NewFiled  
FROM TABLE1

If TABLE2.ID is Unique or a Primary Key, you could also use this:

SELECT 
  TABEL1.Id, 
  CASE WHEN TABLE2.ID IS NOT NULL
       THEN 'TRUE' 
       ELSE 'FALSE'
  END AS NewFiled  
FROM TABLE1
  LEFT JOIN Table2
    ON TABLE2.ID = TABLE1.ID

One way:

SELECT DISTINCT sc.StoreId
FROM StoreClients sc
WHERE NOT EXISTS(
    SELECT * FROM StoreClients sc2 
    WHERE sc2.StoreId = sc.StoreId AND sc2.ClientId = 5)

Seems you can just do single line:

{ "sent_at": null }

Rails Code:

ruby-1.9.2-p290 :099 > ActiveRecord::Base.connection.execute("USE INFORMATION_SCHEMA")

ruby-1.9.2-p290 :099 > ActiveRecord::Base.connection.execute("SELECT SCHEMA_NAME FROM         INFORMATION_SCHEMA.SCHEMATA WHERE SCHEMA_NAME = 'entos_development'").to_a
SQL (0.2ms) SELECT SCHEMA_NAME FROM INFORMATION_SCHEMA.SCHEMATA WHERE SCHEMA_NAME =               'entos_development'
=> [["entos_development"]] 
ruby-1.9.2-p290 :100 > ActiveRecord::Base.connection.execute("SELECT SCHEMA_NAME FROM              INFORMATION_SCHEMA.SCHEMATA WHERE SCHEMA_NAME = 'entos_development1'").to_a
SQL (0.3ms) SELECT SCHEMA_NAME FROM INFORMATION_SCHEMA.SCHEMATA WHERE SCHEMA_NAME =            'entos_development1'
=> []

=> entos_development exist , entos_development1 not exist

Suggest you not to use Count because count always makes extra loads for db use SELECT 1 and it returns 1 if your record right there otherwise it returns null and you can handle it.

The first is the most concise, I would go with that. The first two are the same, but the first is just that little bit shorter, so you'll save on bytes. The third is plain wrong, because that condition will always evaluate true because the object will never be null or falsy for that matter.

A surprisingly fast approach is to use set:

a = ['a', 'b', 'c']
str = "a123"
if set(a) & set(str):
    print("some of the strings found in str")
else:
    print("no strings found in str")

This works if a does not contain any multiple-character values (in which case use any as listed above). If so, it's simpler to specify a as a string: a = 'abc'.

This also works

SELECT *
FROM tableB
WHERE ID NOT IN (
  SELECT ID FROM tableA
);

To optimize the EXISTS, be very literal; something just has to be there, but you don't actually need any data returned from the correlated sub-query. You're just evaluating a Boolean condition.

So:

WHERE EXISTS (SELECT TOP 1 1 FROM Base WHERE bx.BoxID = Base.BoxID AND [Rank] = 2)

Because the correlated sub-query is RBAR, the first result hit makes the condition true, and it is processed no further.

Try this:

INSERT INTO `center_course_fee` (`fk_course_id`,`fk_center_code`,`course_fee`) VALUES ('69', '4920153', '6000') ON DUPLICATE KEY UPDATE `course_fee` = '6000';

with 'exists?':

Business.exists? user_id: current_user.id #=> 1 or nil

with 'any?':

Business.where(:user_id => current_user.id).any? #=> true or false

If you use something with .where, be sure to avoid trouble with scopes and better use .unscoped

Business.unscoped.where(:user_id => current_user.id).any?

For Exact Match

"SELECT * FROM yourTable WHERE city = 'c7'"

For Pattern / Wildcard Search

"SELECT * FROM yourTable WHERE city LIKE '%c7%'"

Of course you can change '%c7%' to '%c7' or 'c7%' depending on how you want to search it. For exact match, use first query example.

PHP

$result = mysql_query("SELECT * FROM yourTable WHERE city = 'c7'");
$matchFound = mysql_num_rows($result) > 0 ? 'yes' : 'no';
echo $matchFound;

You can also use if condition there.

Like this:

$(selector).focusout(function () {
    //Your Code
});

PART I: How To Log In

We'll assume you already know how to build a login+password HTML form which POSTs the values to a script on the server side for authentication. The sections below will deal with patterns for sound practical auth, and how to avoid the most common security pitfalls.

To HTTPS or not to HTTPS?

Unless the connection is already secure (that is, tunneled through HTTPS using SSL/TLS), your login form values will be sent in cleartext, which allows anyone eavesdropping on the line between browser and web server will be able to read logins as they pass through. This type of wiretapping is done routinely by governments, but in general, we won't address 'owned' wires other than to say this: Just use HTTPS.

In essence, the only practical way to protect against wiretapping/packet sniffing during login is by using HTTPS or another certificate-based encryption scheme (for example, TLS) or a proven & tested challenge-response scheme (for example, the Diffie-Hellman-based SRP). Any other method can be easily circumvented by an eavesdropping attacker.

Of course, if you are willing to get a little bit impractical, you could also employ some form of two-factor authentication scheme (e.g. the Google Authenticator app, a physical 'cold war style' codebook, or an RSA key generator dongle). If applied correctly, this could work even with an unsecured connection, but it's hard to imagine that a dev would be willing to implement two-factor auth but not SSL.

(Do not) Roll-your-own JavaScript encryption/hashing

Given the perceived (though now avoidable) cost and technical difficulty of setting up an SSL certificate on your website, some developers are tempted to roll their own in-browser hashing or encryption schemes in order to avoid passing cleartext logins over an unsecured wire.

While this is a noble thought, it is essentially useless (and can be a security flaw) unless it is combined with one of the above - that is, either securing the line with strong encryption or using a tried-and-tested challenge-response mechanism (if you don't know what that is, just know that it is one of the most difficult to prove, most difficult to design, and most difficult to implement concepts in digital security).

While it is true that hashing the password can be effective against password disclosure, it is vulnerable to replay attacks, Man-In-The-Middle attacks / hijackings (if an attacker can inject a few bytes into your unsecured HTML page before it reaches your browser, they can simply comment out the hashing in the JavaScript), or brute-force attacks (since you are handing the attacker both username, salt and hashed password).

CAPTCHAS against humanity

CAPTCHA is meant to thwart one specific category of attack: automated dictionary/brute force trial-and-error with no human operator. There is no doubt that this is a real threat, however, there are ways of dealing with it seamlessly that don't require a CAPTCHA, specifically properly designed server-side login throttling schemes - we'll discuss those later.

Know that CAPTCHA implementations are not created alike; they often aren't human-solvable, most of them are actually ineffective against bots, all of them are ineffective against cheap third-world labor (according to OWASP, the current sweatshop rate is $12 per 500 tests), and some implementations may be technically illegal in some countries (see OWASP Authentication Cheat Sheet). If you must use a CAPTCHA, use Google's reCAPTCHA, since it is OCR-hard by definition (since it uses already OCR-misclassified book scans) and tries very hard to be user-friendly.

Personally, I tend to find CAPTCHAS annoying, and use them only as a last resort when a user has failed to log in a number of times and throttling delays are maxed out. This will happen rarely enough to be acceptable, and it strengthens the system as a whole.

Storing Passwords / Verifying logins

This may finally be common knowledge after all the highly-publicized hacks and user data leaks we've seen in recent years, but it has to be said: Do not store passwords in cleartext in your database. User databases are routinely hacked, leaked or gleaned through SQL injection, and if you are storing raw, plaintext passwords, that is instant game over for your login security.

So if you can't store the password, how do you check that the login+password combination POSTed from the login form is correct? The answer is hashing using a key derivation function. Whenever a new user is created or a password is changed, you take the password and run it through a KDF, such as Argon2, bcrypt, scrypt or PBKDF2, turning the cleartext password ("correcthorsebatterystaple") into a long, random-looking string, which is a lot safer to store in your database. To verify a login, you run the same hash function on the entered password, this time passing in the salt and compare the resulting hash string to the value stored in your database. Argon2, bcrypt and scrypt store the salt with the hash already. Check out this article on sec.stackexchange for more detailed information.

The reason a salt is used is that hashing in itself is not sufficient -- you'll want to add a so-called 'salt' to protect the hash against rainbow tables. A salt effectively prevents two passwords that exactly match from being stored as the same hash value, preventing the whole database being scanned in one run if an attacker is executing a password guessing attack.

A cryptographic hash should not be used for password storage because user-selected passwords are not strong enough (i.e. do not usually contain enough entropy) and a password guessing attack could be completed in a relatively short time by an attacker with access to the hashes. This is why KDFs are used - these effectively "stretch the key", which means that every password guess an attacker makes causes multiple repetitions of the hash algorithm, for example 10,000 times, which causes the attacker to guess the password 10,000 times slower.

Session data - "You are logged in as Spiderman69"

Once the server has verified the login and password against your user database and found a match, the system needs a way to remember that the browser has been authenticated. This fact should only ever be stored server side in the session data.

If you are unfamiliar with session data, here's how it works: A single randomly-generated string is stored in an expiring cookie and used to reference a collection of data - the session data - which is stored on the server. If you are using an MVC framework, this is undoubtedly handled already.

If at all possible, make sure the session cookie has the secure and HTTP Only flags set when sent to the browser. The HttpOnly flag provides some protection against the cookie being read through XSS attack. The secure flag ensures that the cookie is only sent back via HTTPS, and therefore protects against network sniffing attacks. The value of the cookie should not be predictable. Where a cookie referencing a non-existent session is presented, its value should be replaced immediately to prevent session fixation.

Session state can also be maintained on the client side. This is achieved by using techniques like JWT (JSON Web Token).

PART II: How To Remain Logged In - The Infamous "Remember Me" Checkbox

Persistent Login Cookies ("remember me" functionality) are a danger zone; on the one hand, they are entirely as safe as conventional logins when users understand how to handle them; and on the other hand, they are an enormous security risk in the hands of careless users, who may use them on public computers and forget to log out, and who may not know what browser cookies are or how to delete them.

Personally, I like persistent logins for the websites I visit on a regular basis, but I know how to handle them safely. If you are positive that your users know the same, you can use persistent logins with a clean conscience. If not - well, then you may subscribe to the philosophy that users who are careless with their login credentials brought it upon themselves if they get hacked. It's not like we go to our user's houses and tear off all those facepalm-inducing Post-It notes with passwords they have lined up on the edge of their monitors, either.

Of course, some systems can't afford to have any accounts hacked; for such systems, there is no way you can justify having persistent logins.

If you DO decide to implement persistent login cookies, this is how you do it:

1. First, take some time to read Paragon Initiative's article on the subject. You'll need to get a bunch of elements right, and the article does a great job of explaining each.

2. And just to reiterate one of the most common pitfalls, DO NOT STORE THE PERSISTENT LOGIN COOKIE (TOKEN) IN YOUR DATABASE, ONLY A HASH OF IT! The login token is Password Equivalent, so if an attacker got their hands on your database, they could use the tokens to log in to any account, just as if they were cleartext login-password combinations. Therefore, use hashing (according to https://security.stackexchange.com/a/63438/5002 a weak hash will do just fine for this purpose) when storing persistent login tokens.

PART III: Using Secret Questions

Don't implement 'secret questions'. The 'secret questions' feature is a security anti-pattern. Read the paper from link number 4 from the MUST-READ list. You can ask Sarah Palin about that one, after her Yahoo! email account got hacked during a previous presidential campaign because the answer to her security question was... "Wasilla High School"!

Even with user-specified questions, it is highly likely that most users will choose either:

• A 'standard' secret question like mother's maiden name or favorite pet

• A simple piece of trivia that anyone could lift from their blog, LinkedIn profile, or similar

• Any question that is easier to answer than guessing their password. Which, for any decent password, is every question you can imagine

In conclusion, security questions are inherently insecure in virtually all their forms and variations, and should not be employed in an authentication scheme for any reason.

The true reason why security questions even exist in the wild is that they conveniently save the cost of a few support calls from users who can't access their email to get to a reactivation code. This at the expense of security and Sarah Palin's reputation. Worth it? Probably not.

PART IV: Forgotten Password Functionality

I already mentioned why you should never use security questions for handling forgotten/lost user passwords; it also goes without saying that you should never e-mail users their actual passwords. There are at least two more all-too-common pitfalls to avoid in this field:

1. Don't reset a forgotten password to an autogenerated strong password - such passwords are notoriously hard to remember, which means the user must either change it or write it down - say, on a bright yellow Post-It on the edge of their monitor. Instead of setting a new password, just let users pick a new one right away - which is what they want to do anyway. (An exception to this might be if the users are universally using a password manager to store/manage passwords that would normally be impossible to remember without writing it down).

2. Always hash the lost password code/token in the database. AGAIN, this code is another example of a Password Equivalent, so it MUST be hashed in case an attacker got their hands on your database. When a lost password code is requested, send the plaintext code to the user's email address, then hash it, save the hash in your database -- and throw away the original. Just like a password or a persistent login token.

A final note: always make sure your interface for entering the 'lost password code' is at least as secure as your login form itself, or an attacker will simply use this to gain access instead. Making sure you generate very long 'lost password codes' (for example, 16 case-sensitive alphanumeric characters) is a good start, but consider adding the same throttling scheme that you do for the login form itself.

PART V: Checking Password Strength

First, you'll want to read this small article for a reality check: The 500 most common passwords

Okay, so maybe the list isn't the canonical list of most common passwords on any system anywhere ever, but it's a good indication of how poorly people will choose their passwords when there is no enforced policy in place. Plus, the list looks frighteningly close to home when you compare it to publicly available analyses of recently stolen passwords.

So: With no minimum password strength requirements, 2% of users use one of the top 20 most common passwords. Meaning: if an attacker gets just 20 attempts, 1 in 50 accounts on your website will be crackable.

Thwarting this requires calculating the entropy of a password and then applying a threshold. The National Institute of Standards and Technology (NIST) Special Publication 800-63 has a set of very good suggestions. That, when combined with a dictionary and keyboard layout analysis (for example, 'qwertyuiop' is a bad password), can reject 99% of all poorly selected passwords at a level of 18 bits of entropy. Simply calculating password strength and showing a visual strength meter to a user is good, but insufficient. Unless it is enforced, a lot of users will most likely ignore it.

And for a refreshing take on user-friendliness of high-entropy passwords, Randall Munroe's Password Strength xkcd is highly recommended.

Utilize Troy Hunt's Have I Been Pwned API to check users passwords against passwords compromised in public data breaches.

PART VI: Much More - Or: Preventing Rapid-Fire Login Attempts

First, have a look at the numbers: Password Recovery Speeds - How long will your password stand up

If you don't have the time to look through the tables in that link, here's the list of them:

1. It takes virtually no time to crack a weak password, even if you're cracking it with an abacus

2. It takes virtually no time to crack an alphanumeric 9-character password if it is case insensitive

3. It takes virtually no time to crack an intricate, symbols-and-letters-and-numbers, upper-and-lowercase password if it is less than 8 characters long (a desktop PC can search the entire keyspace up to 7 characters in a matter of days or even hours)

4. It would, however, take an inordinate amount of time to crack even a 6-character password, if you were limited to one attempt per second!

So what can we learn from these numbers? Well, lots, but we can focus on the most important part: the fact that preventing large numbers of rapid-fire successive login attempts (ie. the brute force attack) really isn't that difficult. But preventing it right isn't as easy as it seems.

Generally speaking, you have three choices that are all effective against brute-force attacks (and dictionary attacks, but since you are already employing a strong passwords policy, they shouldn't be an issue):

• Present a CAPTCHA after N failed attempts (annoying as hell and often ineffective -- but I'm repeating myself here)

• Locking accounts and requiring email verification after N failed attempts (this is a DoS attack waiting to happen)

• And finally, login throttling: that is, setting a time delay between attempts after N failed attempts (yes, DoS attacks are still possible, but at least they are far less likely and a lot more complicated to pull off).

Best practice #1: A short time delay that increases with the number of failed attempts, like:

• 1 failed attempt = no delay
• 2 failed attempts = 2 sec delay
• 3 failed attempts = 4 sec delay
• 4 failed attempts = 8 sec delay
• 5 failed attempts = 16 sec delay
• etc.

DoS attacking this scheme would be very impractical, since the resulting lockout time is slightly larger than the sum of the previous lockout times.

To clarify: The delay is not a delay before returning the response to the browser. It is more like a timeout or refractory period during which login attempts to a specific account or from a specific IP address will not be accepted or evaluated at all. That is, correct credentials will not return in a successful login, and incorrect credentials will not trigger a delay increase.

Best practice #2: A medium length time delay that goes into effect after N failed attempts, like:

• 1-4 failed attempts = no delay
• 5 failed attempts = 15-30 min delay

DoS attacking this scheme would be quite impractical, but certainly doable. Also, it might be relevant to note that such a long delay can be very annoying for a legitimate user. Forgetful users will dislike you.

Best practice #3: Combining the two approaches - either a fixed, short time delay that goes into effect after N failed attempts, like:

• 1-4 failed attempts = no delay
• 5+ failed attempts = 20 sec delay

Or, an increasing delay with a fixed upper bound, like:

• 1 failed attempt = 5 sec delay
• 2 failed attempts = 15 sec delay
• 3+ failed attempts = 45 sec delay

This final scheme was taken from the OWASP best-practices suggestions (link 1 from the MUST-READ list) and should be considered best practice, even if it is admittedly on the restrictive side.

As a rule of thumb, however, I would say: the stronger your password policy is, the less you have to bug users with delays. If you require strong (case-sensitive alphanumerics + required numbers and symbols) 9+ character passwords, you could give the users 2-4 non-delayed password attempts before activating the throttling.

DoS attacking this final login throttling scheme would be very impractical. And as a final touch, always allow persistent (cookie) logins (and/or a CAPTCHA-verified login form) to pass through, so legitimate users won't even be delayed while the attack is in progress. That way, the very impractical DoS attack becomes an extremely impractical attack.

Additionally, it makes sense to do more aggressive throttling on admin accounts, since those are the most attractive entry points

PART VII: Distributed Brute Force Attacks

Just as an aside, more advanced attackers will try to circumvent login throttling by 'spreading their activities':

• Distributing the attempts on a botnet to prevent IP address flagging

• Rather than picking one user and trying the 50.000 most common passwords (which they can't, because of our throttling), they will pick THE most common password and try it against 50.000 users instead. That way, not only do they get around maximum-attempts measures like CAPTCHAs and login throttling, their chance of success increases as well, since the number 1 most common password is far more likely than number 49.995

• Spacing the login requests for each user account, say, 30 seconds apart, to sneak under the radar

Here, the best practice would be logging the number of failed logins, system-wide, and using a running average of your site's bad-login frequency as the basis for an upper limit that you then impose on all users.

Too abstract? Let me rephrase:

Say your site has had an average of 120 bad logins per day over the past 3 months. Using that (running average), your system might set the global limit to 3 times that -- ie. 360 failed attempts over a 24 hour period. Then, if the total number of failed attempts across all accounts exceeds that number within one day (or even better, monitor the rate of acceleration and trigger on a calculated threshold), it activates system-wide login throttling - meaning short delays for ALL users (still, with the exception of cookie logins and/or backup CAPTCHA logins).

I also posted a question with more details and a really good discussion of how to avoid tricky pitfals in fending off distributed brute force attacks

PART VIII: Two-Factor Authentication and Authentication Providers

Credentials can be compromised, whether by exploits, passwords being written down and lost, laptops with keys being stolen, or users entering logins into phishing sites. Logins can be further protected with two-factor authentication, which uses out-of-band factors such as single-use codes received from a phone call, SMS message, app, or dongle. Several providers offer two-factor authentication services.

Authentication can be completely delegated to a single-sign-on service, where another provider handles collecting credentials. This pushes the problem to a trusted third party. Google and Twitter both provide standards-based SSO services, while Facebook provides a similar proprietary solution.

MUST-READ LINKS About Web Authentication

1. OWASP Guide To Authentication / OWASP Authentication Cheat Sheet
2. Dos and Don’ts of Client Authentication on the Web (very readable MIT research paper)
3. Wikipedia: HTTP cookie
4. Personal knowledge questions for fallback authentication: Security questions in the era of Facebook (very readable Berkeley research paper)

A virtual function makes its class a polymorphic base class. Derived classes can override virtual functions. Virtual functions called through base class pointers/references will be resolved at run-time. That is, the dynamic type of the object is used instead of its static type:

 Derived d;
 Base& rb = d;
 // if Base::f() is virtual and Derived overrides it, Derived::f() will be called
 rb.f();  

A pure virtual function is a virtual function whose declaration ends in =0:

class Base {
  // ...
  virtual void f() = 0;
  // ...

A pure virtual function implicitly makes the class it is defined for abstract (unlike in Java where you have a keyword to explicitly declare the class abstract). Abstract classes cannot be instantiated. Derived classes need to override/implement all inherited pure virtual functions. If they do not, they too will become abstract.

An interesting 'feature' of C++ is that a class can define a pure virtual function that has an implementation. (What that's good for is debatable.)

Note that C++11 brought a new use for the delete and default keywords which looks similar to the syntax of pure virtual functions:

my_class(my_class const &) = delete;
my_class& operator=(const my_class&) = default;

See this question and this one for more info on this use of delete and default.

One line: $ran[rand(0, count($ran) - 1)]

Ben Gripka's solution causes infinite loops. His batch works like this (pseudo code):

IF "no admin privileges?"
    "write a VBS that calls this batch with admin privileges"
ELSE
    "execute actual commands that require admin privileges"

As you can see, this causes an infinite loop, if the VBS fails requesting admin privileges.

However, the infinite loop can occur, although admin priviliges have been requested successfully.

The check in Ben Gripka's batch file is just error-prone. I played around with the batch and observed that admin privileges are available although the check failed. Interestingly, the check worked as expected, if I started the batch file from windows explorer, but it didn't when I started it from my IDE.

So I suggest to use two separate batch files. The first generates the VBS that calls the second batch file:

@echo off

echo Set UAC = CreateObject^("Shell.Application"^) > "%temp%\getadmin.vbs"
set params = %*:"=""
echo UAC.ShellExecute "cmd.exe", "/c ""%~dp0\my_commands.bat"" %params%", "", "runas", 1 >> "%temp%\getadmin.vbs"

"%temp%\getadmin.vbs"
del "%temp%\getadmin.vbs"

The second, named "my_commands.bat" and located in the same directory as the first contains your actual commands:

pushd "%CD%"
CD /D "%~dp0"
REM Your commands which require admin privileges here

This causes no infinite loops and also removes the error-prone admin privilege check.

FYI of people that have asked in the comments, this is what I actually used in projects:

function onLoad(loading, loaded) {
    if(document.readyState === 'complete'){
        return loaded();
    }
    loading();
    if (window.addEventListener) {
        window.addEventListener('load', loaded, false);
    }
    else if (window.attachEvent) {
        window.attachEvent('onload', loaded);
    }
};

onLoad(function(){
   console.log('I am waiting for the page to be loaded');
},
function(){
    console.log('The page is loaded');
});

simply use

final String WELCOME_MESSAGE = "Hello, welcome to the server";

the main part of this instruction is the 'final' keyword.

As an additional note, there is no need for the for loop because of R's vectorization.

This:

P <- 243.51
t <- 31 / 365
n <- 365

for (r in seq(0.15, 0.22, by = 0.01))    
     A <- P * ((1 + (r/ n))^ (n * t))
     interest <- A - P
}

is equivalent to:

P <- 243.51
t <- 31 / 365
n <- 365
r <- seq(0.15, 0.22, by = 0.01)
A <- P * ((1 + (r/ n))^ (n * t))
interest <- A - P

Because r is a vector, the expression above containing it is performed for all values of the vector.

As other answers stated , 'Order by' after LAST Union should apply to both datasets joined by union.

I was having two data sets but using different tables but same columns. 'Order by' after LAST Union didn't still worked. Using ALIAS for column used in 'order by' did the trick.

Select Name, Address for Employee 
Union
Select Customer_Name, Address from Customer
order by customer_name;   --Won't work

So solution is use Alias 'User_Name' :

Select Name as User_Name, Address for Employee 
Union
Select Customer_Name as User_Name, Address from Customer
order by User_Name; 

The response provided by Trevor is correct.

But here is what you can directly add in your .gitconfig:

# Enforce SSH
[url "ssh://[email protected]/"]
  insteadOf = https://github.com/
[url "ssh://[email protected]/"]
  insteadOf = https://gitlab.com/
[url "ssh://[email protected]/"]
  insteadOf = https://bitbucket.org/

Try this to Change content of div using jQuery.

See more @ Change content of div using jQuery

$(document).ready(function(){
    $("#Textarea").keyup(function(){
        // Getting the current value of textarea
        var currentText = $(this).val();

        // Setting the Div content
        $(".output").text(currentText);
    });
});

based to the answer that was given and some improvements this is my approach

def PercentageMissin(Dataset):
    """this function will return the percentage of missing values in a dataset """
    if isinstance(Dataset,pd.DataFrame):
        adict={} #a dictionary conatin keys columns names and values percentage of missin value in the columns
        for col in Dataset.columns:
            adict[col]=(np.count_nonzero(Dataset[col].isnull())*100)/len(Dataset[col])
        return pd.DataFrame(adict,index=['% of missing'],columns=adict.keys())
    else:
        raise TypeError("can only be used with panda dataframe")

String loudScreaming = json.getJSONObject("LabelData").getString("slogan");

I had this error because in my test I had two expectations, one on a mock and one on concrete type

MyClass cls = new MyClass();
MyClass cls2 = Mockito.mock(Myclass.class);
when(foo.bar(cls)).thenReturn(); // cls is not actually a mock
when(foo.baz(cls2)).thenReturn();

I fixed it by changing cls to be a mock as well

private void OnDropDownClosed(object sender, EventArgs e)
{ 
     if (combobox.SelectedItem == null) return;
     // Do actions
}

data = 'data you want inside the file'.

You can use File.write('name of file here', data)

Another method is to use netcat (or nc, dependent upon which posix) in the same format as vatine shows or you can create a text file that contains each command on it's own line.

I have found that some posix' telnets do not handle redirect correctly (which is why I suggest netcat)

Same error gets thrown when

apply plugin: 'com.google.gms.google-services'

is not added to bottom of the module build.gradle file.

Even shorter and with json-functions:

JSONObject songsObject = json.getJSONObject("songs");
JSONArray songsArray = songsObject.toJSONArray(songsObject.names());

The tag in web.config is based on paths, whereas MVC works with controller actions and routes.

It is an architectural decision that might not make a lot of difference if you just want to prevent users that aren't logged in but makes a lot of difference when you try to apply authorization based in Roles and in cases that you want custom handling of types of Unauthorized.

The first case is covered from the answer of BobRock.

The user should have at least one of the following Roles to access the Controller or the Action

[Authorize(Roles = "Admin, Super User")]

The user should have both these roles in order to be able to access the Controller or Action

[Authorize(Roles = "Super User")]
[Authorize(Roles = "Admin")]

The users that can access the Controller or the Action are Betty and Johnny

[Authorize(Users = "Betty, Johnny")]

In ASP.NET Core you can use Claims and Policy principles for authorization through [Authorize].

options.AddPolicy("ElevatedRights", policy =>
                  policy.RequireRole("Administrator", "PowerUser", "BackupAdministrator"));

[Authorize(Policy = "ElevatedRights")]

The second comes very handy in bigger applications where Authorization might need to be implemented with different restrictions, process and handling according to the case. For this reason we can Extend the AuthorizeAttribute and implement different authorization alternatives for our project.

public class CustomAuthorizeAttribute: AuthorizeAttribute  
{  
    public override void OnAuthorization(AuthorizationContext filterContext)  
    {  }
}

The "correct-completed" way to do authorization in ASP.NET MVC is using the [Authorize] attribute.

This works for me:

export var jQuery: any = window["jQuery"];

I faced the same problem. There are two types of permissions in Android:

• Dangerous (access to contacts, write to external storage...)
• Normal

Normal permissions are automatically approved by Android while dangerous permissions need to be approved by Android users.

Here is the strategy to get dangerous permissions in Android 6.0

1. Check if you have the permission granted
2. If your app is already granted the permission, go ahead and perform normally.
3. If your app doesn't have the permission yet, ask for user to approve
4. Listen to user approval in onRequestPermissionsResult

Here is my case: I need to write to external storage.

First, I check if I have the permission:

...
private static final int REQUEST_WRITE_STORAGE = 112;
...
boolean hasPermission = (ContextCompat.checkSelfPermission(activity,
            Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED);
if (!hasPermission) {
    ActivityCompat.requestPermissions(parentActivity,
                new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE},
                REQUEST_WRITE_STORAGE);
}

Then check the user's approval:

@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
    super.onRequestPermissionsResult(requestCode, permissions, grantResults);
    switch (requestCode)
    {
        case REQUEST_WRITE_STORAGE: {
            if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED)
            {
                //reload my activity with permission granted or use the features what required the permission
            } else
            {
                Toast.makeText(parentActivity, "The app was not allowed to write to your storage. Hence, it cannot function properly. Please consider granting it this permission", Toast.LENGTH_LONG).show();
            }
        }
    }

}

You can read more about the new permission model here: https://developer.android.com/training/permissions/requesting.html

I faced with this problem if i leave the empty constructor in the receiver class. After the removing the empty contsructor onRreceive methos started working fine.

target="_blank" is enough to open in a new tab, when you are using react-router

eg: <Link to={/admin/posts/error-post-list/${this.props.errorDate}} target="_blank"> View Details </Link>

I need help to adjust my script below or to find a script that could be used on my wordpress site to grab the url suffix parameters from a forward url, then to be added at the button click url for tracking the proper forward ads id.

REASON: parameters are used for advertisement tracking to find out from which ad the user has been forward, even if the user hops from optin page to the sales page by using button click.

Here the goal to reach: 1. An FB ad points to an optin page with tracking code: https://ownsite.com/optin-page/?tid=fbad1 2. At the optin-page there is a button with a setup URL to forward to the sales page, but if clicked then only the URL is forward, but the parameter "?tid=fbad1" is missing. 3. The auto-forward script below (which is working properly) can be used to change for button click forward, but has a limitation as it grab only "tid" parameters instead also utm parameters.

Therefore a script code shall be implemented to establish click buttons (also to style them or use images instead) and while clicking the button to forward to a different sales page with grabbing the suffix parameter form the current optin-page to forward then to sales-page https://ownsite.com/sales-page/?tid=fbad1 also including UTM parameters

Currently, I could have solved this by using an auto-redirect script, but A.) I do not want to use an autoredirect at this page. Better is an event click button used to let the user himself click to forward with the URL parameter included. B.) The tracking ID parameter in this script is limited to "?tid=..." instead I do also want to track the UTM code on button click also i.e. Grab from current page the paramater of URL https://www.optin-page.com/?tid=facebookad1?utm_campaign=blogpost then on button click grab parameters and add to button set URL https://www.sales-page.com/?tid=facebookad1?utm_campaign=blogpost

Please now find here the Code below in use for auto-redirect and grabbing the URL parameters. This code shall be changed now to be able to create a button with a click-event to be redirect then to the forward URL with parameter grabbing of current URL if the button is clicked (as stated above).

    <p><!-- Modify this according to your requirement - core script from https://gist.github.com/Joel-James/62d98e8cb3a1b6b05102 and suffix grabbing </p>
    <h3 style="text-align: center;"><span style="color: #ffffff; background-color: #039e00;">?Auto-redirecting after <span id="countdown">35</span> seconds?</span></h3>
    <p><!-- JavaScript part --><br /><script type="text/javascript">

function findGetParameter(parameterName) {
    var result = null,
        tmp = [];
    location.search
        .substr(1)
        .split("&")
        .forEach(function (item) {
          tmp = item.split("=");
          if (tmp[0] === parameterName) result = decodeURIComponent(tmp[1]);
        });
    return result;
}


    // Total seconds to wait
    var seconds = 45;

    function countdown() {
        seconds = seconds - 1;
        if (seconds < 0) {
            // Chnage your redirection link here
var tid = findGetParameter('tid');
window.location = "https://www.2share.info/ql-cb2/" + '?tid='+tid;
        } else {
            // Update remaining seconds
            document.getElementById("countdown").innerHTML = seconds;
            // Count down using javascript
            window.setTimeout("countdown()", 1000);
        }
    }

    // Run countdown function
    countdown();

</script></p>

DOMContentLoaded==window.onDomReady()

Load==window.onLoad()

A page can't be manipulated safely until the document is "ready." jQuery detects this state of readiness for you. Code included inside $(document).ready() will only run once the page Document Object Model (DOM) is ready for JavaScript code to execute. Code included inside $(window).load(function() { ... }) will run once the entire page (images or iframes), not just the DOM, is ready.

See: Using JQuery Core's document-ready documentation.

The word "read" is vague, but here is an example which reads a jpeg file using the Image class, and prints information about it.

from PIL import Image
jpgfile = Image.open("picture.jpg")

print(jpgfile.bits, jpgfile.size, jpgfile.format)

My general rule is that if you want a browser web client to directly connect to a service then you should probably use REST. If you want to pass structured data between back-end services then use SOAP.

SOAP can be a real pain to set up sometimes and is often overkill for simple web client and server data exchanges. Unfortunately, most simple programming examples I've seen (and learned from) somewhat reenforce this perception.

That said, SOAP really shines when you start combining multiple SOAP services together as part of a larger process driven by a data workflow (think enterprise software). This is something that many of the SOAP programming examples fail to convey because a simple SOAP operation to do something, like fetch the price of a stock, is generally overcomplicated for what it does by itself unless it is presented in the context of providing a machine readable API detailing specific functions with set data formats for inputs and outputs that is, in turn, scripted by a larger process.

This is sad, in a way, as it really gives SOAP a bad reputation because it is difficult to show the advantages of SOAP without presenting it in the full context of how the final product is used.

The table normally contains multiple rows. Use a loop and use row.Field<string>(0) to access the value of each row.

foreach(DataRow row in dt.Rows)
{
    string file = row.Field<string>("File");
}

You can also access it via index:

foreach(DataRow row in dt.Rows)
{
    string file = row.Field<string>(0);
}

If you expect only one row, you can also use the indexer of DataRowCollection:

string file = dt.Rows[0].Field<string>(0); 

Since this fails if the table is empty, use dt.Rows.Count to check if there is a row:

if(dt.Rows.Count > 0)
    file = dt.Rows[0].Field<string>(0);

Well, I use this method on my site:

<a class="share-btn" href="https://www.facebook.com/sharer/sharer.php?app_id=[your_app_id]&sdk=joey&u=[full_article_url]&display=popup&ref=plugin&src=share_button" onclick="return !window.open(this.href, 'Facebook', 'width=640,height=580')">

Works perfectly.

No need for custom middleware?! In express:

 //you probably have something like this already    
app.use("/public", express.static('public')); 

Then put your favicon in public and add the following line in your html's head:

<link rel="icon" href="/public/favicon.ico">

JSON.parse() takes a JSON string and transforms it into a JavaScript object.

JSON.stringify() takes a JavaScript object and transforms it into a JSON string.

const myObj = {
      name: 'bipon',
      age: 25,
      favoriteFood: 'fish curry'
};

 const myObjStr = JSON.stringify(myObj);

console.log(myObjStr);
// "{"name":"bipon","age":26,"favoriteFood":"fish curry"}"

console.log(JSON.parse(myObjStr));
 // Object {name:"bipon",age:26,favoriteFood:"fish curry"}

const myArr = ['simon', 'gomez', 'john'];

const myArrStr = JSON.stringify(myArr);

console.log(myArrStr);
// "["simon","gomez","john"]"

console.log(JSON.parse(myArrStr));
// ["simon","gomez","john"]

Unfortunately, the string.encode() method is not always reliable. Check out this thread for more information: What is the fool proof way to convert some string (utf-8 or else) to a simple ASCII string in python

It's entirely likely that a large portion of the developer base comes from a Java background where using == to compare strings is wrong and doesn't work.

In C# there's no (practical) difference (for strings) as long as they are typed as string.

If they are typed as object or T then see other answers here that talk about generic methods or operator overloading as there you definitely want to use the Equals method.

You can use strcpy but remember to end the array with '\0'

char array[20]; char string[100];

array[0]='1'; array[1]='7'; array[2]='8'; array[3]='.'; array[4]='9'; array[5]='\0';
strcpy(string, array);
printf("%s\n", string);

With Android Studio:

Windows: Ctrl+Left-Arrow and Ctrl+Right-Arrow

i used chardet to detect possible encoding of this data ( if its text ), but get {'confidence': 0.0, 'encoding': None}. Then i tried to use pickle.load and get nothing again. I tried to save this as file , test many different formats and failed here too. Maybe you tell us what type have this 16512 bytes of mysterious data?

For beginners, I wanted to add to the accepted answer, because a couple of subtleties were unclear to me:

To find and modify text (not completely replace),

1. In the "Find" step, you can use regex with "capturing groups," e.g. your search could be la la la (group1) blah blah (group2), using parentheses.

2. And then in the "Replace" step, you can refer to the capturing groups via $1, $2 etc.

So, for example, in this case we could find the relevant text with just <h1>.+?<\/h1> (no parentheses), but putting in the parentheses <h1>(.+?)<\/h1> allows us to refer to the sub-match in between them as $1 in the replace step. Cool!

Notes

• To turn on Regex in the Find Widget, click the .* icon, or press Cmd/Ctrl Alt R

• $0 refers to the whole match

• Finally, the original question states that the replace should happen "within a document," so you can use the "Find Widget" (Cmd or Ctrl + F), which is local to the open document, instead of "Search", which opens a bigger UI and looks across all files in the project.

Google Play services Integration in Android studio.

Step 1:

SDK manager->Tools Update this

1.Google play services
2.Android Support Repository

Step 2:

chance in build.gradle 
defaultConfig {
        minSdkVersion 8
        targetSdkVersion 19
        versionCode 1
        versionName "1.0"
    }
    dependencies {
    compile 'com.android.support:appcompat-v7:+'
    compile 'com.google.android.gms:play-services:4.0.+'
}

Step 3:

 android.manifest.xml
<uses-sdk
        android:minSdkVersion="8" />

Step 4:

Sync project file with grandle.
wait for few minute.

Step 5:

File->Project Structure find error with red bulb images,click on go to add dependencies select your app module.
Save

Please put comment if you have require help. Happy coding.

Actually - Patrick's code sort of worked for me as well. The correct way to do it would be along the lines of this:

Note: there's a bit of jquery ahead:

if ($.browser.msie == false) {
    var h = (document.getElementById("iframeID").contentDocument.body.offsetHeight);
} else {
    var h = (document.getElementById("iframeID").Document.body.scrollHeight);
}

You just need this:

$(".hidden").attr("placeholder", "Type here to search");

classList is used for manipulating classes and not attributes.

<?php

  class Test {
     function MethodA(){
         echo __FUNCTION__ ;
     }
 }
 $test = new Test;
 echo $test->MethodA();
?>

Result: "MethodA";

This answers is for command needed for undoing local changes which are in multiple specific files in same or multiple folders (or directories). This answers specifically addresses question where a user has more than one file but the user doesn't want to undo all local changes:

if you have one or more files you could apply the same command (git checkout -- file ) to each of those files by listing each of their location separated by space as in:

git checkout -- name1/name2/fileOne.ext nameA/subFolder/fileTwo.ext

mind the space above between name1/name2/fileOne.ext nameA/subFolder/fileTwo.ext

For multiple files in the same folder:

If you happen to need to discard changes for all of the files in a certain directory, use the git checkout as follows:

git checkout -- name1/name2/*

The asterisk in the above does the trick of undoing all files at that location under name1/name2.

And, similarly the following can undo changes in all files for multiple folders:

git checkout -- name1/name2/* nameA/subFolder/*

again mind the space between name1/name2/* nameA/subFolder/* in the above.

Note: name1, name2, nameA, subFolder - all of these example folder names indicate the folder or package where the file(s) in question may be residing.

You can try this, it is fully customizable.

ClipOval(
  child: Material(
    color: Colors.blue, // button color
    child: InkWell(
      splashColor: Colors.red, // inkwell color
      child: SizedBox(width: 56, height: 56, child: Icon(Icons.menu)),
      onTap: () {},
    ),
  ),
)

Output:

I know the problem! You just put a dot after "test.jpg"!

cvSaveImage("test.jpg". ,pSaveImg);

I may be wrong but I think its not good!

You are looking for the cp command. You need to change directories so that you are outside of the directory you are trying to copy.

If the directory you're copying is called dir1 and you want to copy it to your /home/Pictures folder:

cp -r dir1/ ~/Pictures/

Linux is case-sensitive and also needs the / after each directory to know that it isn't a file. ~ is a special character in the terminal that automatically evaluates to the current user's home directory. If you need to know what directory you are in, use the command pwd.

When you don't know how to use a Linux command, there is a manual page that you can refer to by typing:

man [insert command here]

at a terminal prompt.

Also, to auto complete long file paths when typing in the terminal, you can hit Tab after you've started typing the path and you will either be presented with choices, or it will insert the remaining part of the path.

you can use cURL library for posting data: http://www.php.net/curl

$ch = curl_init();
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
curl_setopt($ch, CURLOPT_URL, "http://websiteURL");
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, "XML=".$xmlcontent."&password=".$password."&etc=etc");
$content=curl_exec($ch);

where postfield contains XML you need to send - you will need to name the postfield the API service (Clickatell I guess) expects

There is a lot of hate for this pattern in Java. However, an interface of static constants does sometimes have value. You need to basically fulfill the following conditions:

1. The concepts are part of the public interface of several classes.

2. Their values might change in future releases.

3. Its critical that all implementations use the same values.

For example, suppose that you are writing an extension to a hypothetical query language. In this extension you are going to expand the language syntax with some new operations, which are supported by an index. E.g. You are going to have a R-Tree supporting geospatial queries.

So you write a public interface with the static constant:

public interface SyntaxExtensions {
     // query type
     String NEAR_TO_QUERY = "nearTo";

     // params for query
     String POINT = "coordinate";
     String DISTANCE_KM = "distanceInKm";
}

Now later, a new developer thinks he needs to build a better index, so he comes and builds an R* implementation. By implementing this interface in his new tree he guarantees that the different indexes will have identical syntax in the query language. Moreover, if you later decided that "nearTo" was a confusing name, you could change it to "withinDistanceInKm", and know that the new syntax would be respected by all your index implementations.

PS: The inspiration for this example is drawn from the Neo4j spatial code.

//To delete all the files of a specific folder & subfolder
public static void deleteFiles(File directory, Context c) {
    try {
        for (File file : directory.listFiles()) {
            if (file.isFile()) {
                final ContentResolver contentResolver = c.getContentResolver();
                String canonicalPath;
                try {
                    canonicalPath = file.getCanonicalPath();
                } catch (IOException e) {
                    canonicalPath = file.getAbsolutePath();
                }
                final Uri uri = MediaStore.Files.getContentUri("external");
                final int result = contentResolver.delete(uri,
                        MediaStore.Files.FileColumns.DATA + "=?", new String[]{canonicalPath});
                if (result == 0) {
                    final String absolutePath = file.getAbsolutePath();
                    if (!absolutePath.equals(canonicalPath)) {
                        contentResolver.delete(uri,
                                MediaStore.Files.FileColumns.DATA + "=?", new String[]{absolutePath});
                    }
                }
                if (file.exists()) {
                    file.delete();
                    if (file.exists()) {
                        try {
                            file.getCanonicalFile().delete();
                        } catch (IOException e) {
                            e.printStackTrace();
                        }
                        if (file.exists()) {
                            c.deleteFile(file.getName());
                        }
                    }
                }
            } else
                deleteFiles(file, c);
        }
    } catch (Exception e) {
    }
}

here is your solution it will also refresh the gallery as well.

I had the same problem as you do and I could solve it by following @CarlosRojas instructions with a little difference. Instead of create a new firewall rule I edited the default-allow-internal one to accept traffic from anywhere since creating new rules didn't make any difference.

In simple terms, inside a then handler function:

A) When x is a value (number, string, etc):

1. return x is equivalent to return Promise.resolve(x)
2. throw x is equivalent to return Promise.reject(x)

B) When x is a Promise that is already settled (not pending anymore):

1. return x is equivalent to return Promise.resolve(x), if the Promise was already resolved.
2. return x is equivalent to return Promise.reject(x), if the Promise was already rejected.

C) When x is a Promise that is pending:

1. return x will return a pending Promise, and it will be evaluated on the subsequent then.

Read more on this topic on the Promise.prototype.then() docs.

On Oracle 9.2+ (not 8i+ as originally stated), SQL Server 2005+, PostgreSQL 8.4+, DB2, Firebird 3.0+, Teradata, Sybase, Vertica:

WITH summary AS (
    SELECT p.id, 
           p.customer, 
           p.total, 
           ROW_NUMBER() OVER(PARTITION BY p.customer 
                                 ORDER BY p.total DESC) AS rk
      FROM PURCHASES p)
SELECT s.*
  FROM summary s
 WHERE s.rk = 1

Supported by any database:

But you need to add logic to break ties:

  SELECT MIN(x.id),  -- change to MAX if you want the highest
         x.customer, 
         x.total
    FROM PURCHASES x
    JOIN (SELECT p.customer,
                 MAX(total) AS max_total
            FROM PURCHASES p
        GROUP BY p.customer) y ON y.customer = x.customer
                              AND y.max_total = x.total
GROUP BY x.customer, x.total

Recently, I explored the possibilities to parameterize the folder to scan through and the place where the result of recursive scan will be stored. At the end, I also did summarize the number of folders scanned and number of files inside as well. Sharing it with community in case it may help other developers.

    ##Script Starts
    #read folder to scan and file location to be placed

    $whichFolder = Read-Host -Prompt 'Which folder to Scan?'  
    $whereToPlaceReport = Read-Host -Prompt 'Where to place Report'
    $totalFolders = 1
    $totalFiles = 0

    Write-Host "Process started..."

    #IMP separator ? : used as a file in window cannot contain this special character in the file name

    #Get Foldernames into Variable for ForEach Loop
    $DFSFolders = get-childitem -path $whichFolder | where-object {$_.Psiscontainer -eq "True"} |select-object name ,fullName

    #Below Logic for Main Folder
    $mainFiles = get-childitem -path "C:\Users\User\Desktop" -file
    ("Folder Path" + "?" + "Folder Name" + "?" + "File Name " + "?"+ "File Length" )| out-file "$whereToPlaceReport\Report.csv" -Append

    #Loop through folders in main Directory
    foreach($file in $mainFiles)
    {

    $totalFiles = $totalFiles + 1
    ("C:\Users\User\Desktop" + "?" + "Main Folder" + "?"+ $file.name + "?" + $file.length ) | out-file "$whereToPlaceReport\Report.csv" -Append
    }


    foreach ($DFSfolder in $DFSfolders)
    {
    #write the folder name in begining
    $totalFolders = $totalFolders + 1

    write-host " Reading folder C:\Users\User\Desktop\$($DFSfolder.name)"
    #$DFSfolder.fullName | out-file "C:\Users\User\Desktop\PoC powershell\ok2.csv" -Append
    #For Each Folder obtain objects in a specified directory, recurse then filter for .sft file type, obtain the filename, then group, sort and eventually show the file name and total incidences of it.

    $files = get-childitem -path "$whichFolder\$($DFSfolder.name)" -recurse

    foreach($file in $files)
    {
    $totalFiles = $totalFiles + 1
    ($DFSfolder.fullName + "?" + $DFSfolder.name + "?"+ $file.name + "?" + $file.length ) | out-file "$whereToPlaceReport\Report.csv" -Append
    }

    }


    # If running in the console, wait for input before closing.
    if ($Host.Name -eq "ConsoleHost")
    {

    Write-Host "" 
    Write-Host ""
    Write-Host ""

    Write-Host  "                            **Summary**"  -ForegroundColor Red
    Write-Host  "                            ------------" -ForegroundColor Red

    Write-Host  "                           Total Folders Scanned = $totalFolders "  -ForegroundColor Green
    Write-Host  "                           Total Files   Scanned = $totalFiles "     -ForegroundColor Green

    Write-Host "" 
    Write-Host "" 
        Write-Host "I have done my Job,Press any key to exit" -ForegroundColor white
        $Host.UI.RawUI.FlushInputBuffer()   # Make sure buffered input doesn't "press a key" and skip the ReadKey().
        $Host.UI.RawUI.ReadKey("NoEcho,IncludeKeyUp") > $null
    }

##Output

##Bat Code to run above powershell command

@ECHO OFF
SET ThisScriptsDirectory=%~dp0
SET PowerShellScriptPath=%ThisScriptsDirectory%MyPowerShellScript.ps1
PowerShell -NoProfile -ExecutionPolicy Bypass -Command "& {Start-Process PowerShell -ArgumentList '-NoProfile -ExecutionPolicy Bypass -File ""%PowerShellScriptPath%""' -Verb RunAs}";

The Header property of the TreeViewItem is statically typed to be of type object.

Therefore the == yields false. You can reproduce this with the following simple snippet:

object s1 = "Hallo";

// don't use a string literal to avoid interning
string s2 = new string(new char[] { 'H', 'a', 'l', 'l', 'o' });

bool equals = s1 == s2;         // equals is false
equals = string.Equals(s1, s2); // equals is true

For Ubuntu,

python -c "from distutils.sysconfig import get_python_lib; print get_python_lib()"

...is not correct.

It will point you to /usr/lib/pythonX.X/dist-packages

This folder only contains packages your operating system has automatically installed for programs to run.

On ubuntu, the site-packages folder that contains packages installed via setup_tools\easy_install\pip will be in /usr/local/lib/pythonX.X/dist-packages

The second folder is probably the more useful one if the use case is related to installation or reading source code.

If you do not use Ubuntu, you are probably safe copy-pasting the first code box into the terminal.

One thing that should be considered is licensing.

Notepad++ is free (as in speech and as in beer) for perpetual use, released under the GPL license, whereas Sublime Text 2 requires a license.

To quote the Sublime Text 2 website:

..a license must be purchased for continued use. There is currently no enforced time limit for the evaluation.

The same is now true of Sublime Text 3, and a paid upgrade will be needed for future versions.

Upgrade Policy A license is valid for Sublime Text 3, and includes all point updates, as well as access to prior versions (e.g., Sublime Text 2). Future major versions, such as Sublime Text 4, will be a paid upgrade.

This licensing requirement is still correct as of Dec 2019.

No, its not

<div> tags are always abused to create a web layout. Its symbolic purpose is to divide a section/portion in the page so that separate style can be added or applied to it. ^{[w3schools Doc] [W3C]}

It highly depends on what your some and another has.

HTML5, has more logical meaning tags, instead of having plain layout tags. The section, header, nav, aside everything have their own semantic meaning to it. And are used against <div>

$("#commentForm").validate({
    rules: {
     cname : { required : true, minlength: 2 }
    }
});

Should be something like that, I've just typed this up in the editor here so might be a syntax error or two, but you should be able to follow the pattern and the documentation

if you want to specifically find strings which ends with desired characters then this would help you...

select * from tablename where col_name like '%190'

Try to check the length of the selector, if it returns you something then the element must exists else not.

if( $('#selector').length )         // use this if you are using id to check
{
     // it exists
}


if( $('.selector').length )         // use this if you are using class to check
{
     // it exists
}

Use the first if condition for id and the 2nd one for class.

It seems working :

HTML :

 <input type='text' id="pointspossible"/>
<input type='text' id="pointsgiven" />
<input type='text' id="pointsperc" disabled/>

JavaScript :

    $(function(){

    $('#pointspossible').on('input', function() {
      calculate();
    });
    $('#pointsgiven').on('input', function() {
     calculate();
    });
    function calculate(){
        var pPos = parseInt($('#pointspossible').val()); 
        var pEarned = parseInt($('#pointsgiven').val());
        var perc="";
        if(isNaN(pPos) || isNaN(pEarned)){
            perc=" ";
           }else{
           perc = ((pEarned/pPos) * 100).toFixed(3);
           }

        $('#pointsperc').val(perc);
    }

});

Demo : http://jsfiddle.net/vikashvverma/1khs8sj7/1/

df1.take(1).length>0

The take method returns the array of rows, so if the array size is equal to zero, there are no records in df.

Well, I just did

brew install mongodb

and followed the instructions that were output to the STDOUT after it finished installing, and that seems to have worked just fine. I guess it kinda works just like make install and overwrites (upgrades) a previous install.

ls -ltrh /proc | grep YOUR-PID-HERE

For example, my Google Chrome's PID is 11583:

ls -l /proc | grep 11583
dr-xr-xr-x  7 adam       adam                     0 2011-04-20 16:34 11583

You could try something like this. I'm sure there's some room for refactoring. I couldn't get around using the split function. Maybe someone knows of a way to do it without split.

Code to set up, can put this in your .js library

Code to use it (has client side code, only because it was tested in a browser):

var sentence = "My Stack is Overflowing."
document.write(sentence.reverseLetters() + '<br />');
document.write(sentence.reverseWords() + '<br />');

Snippet:

String.prototype.aggregate = function(vals, aggregateFunction) {_x000D_
_x000D_
  var temp = '';_x000D_
  for (var i = vals.length - 1; i >= 0; i--) {_x000D_
    temp = aggregateFunction(vals[i], temp);_x000D_
  }_x000D_
  return temp;_x000D_
}_x000D_
_x000D_
String.prototype.reverseLetters = function() {_x000D_
  return this.aggregate(this.split(''),_x000D_
    function(current, word) {_x000D_
      return word + current;_x000D_
    })_x000D_
}_x000D_
_x000D_
String.prototype.reverseWords = function() {_x000D_
  return this.aggregate(this.split(' '),_x000D_
    function(current, word) {_x000D_
      return word + ' ' + current;_x000D_
    })_x000D_
}_x000D_
_x000D_
var sentence = "My Stack is Overflowing."_x000D_
document.write(sentence.reverseLetters() + '<br />');_x000D_
document.write(sentence.reverseWords() + '<br />');

The constructor of your A object allocates another object dynamically and stores a pointer to that dynamically allocated object in a raw pointer.

For that scenario, you must define your own copy constructor , assignment operator and destructor. The compiler generated ones will not work correctly. (This is a corollary to the "Law of the Big Three": A class with any of destructor, assignment operator, copy constructor generally needs all 3).

You have defined your own destructor (and you mentioned creating a copy constructor), but you need to define both of the other 2 of the big three.

An alternative is to store the pointer to your dynamically allocated int[] in some other object that will take care of these things for you. Something like a vector<int> (as you mentioned) or a boost::shared_array<>.

To boil this down - to take advantage of RAII to the full extent, you should avoid dealing with raw pointers to the extent possible.

And since you asked for other style critiques, a minor one is that when you are deleting raw pointers you do not need to check for 0 before calling delete - delete handles that case by doing nothing so you don't have to clutter you code with the checks.

Yeah you can use reflections to access private variables. Altough not a good idea.

Check this out:

http://en.wikibooks.org/wiki/Java_Programming/Reflection/Accessing_Private_Features_with_Reflection

jQuery.load() is probably the easiest way to load data asynchronously using a selector, but you can also use any of the jquery ajax methods (get, post, getJSON, ajax, etc.)

Note that load allows you to use a selector to specify what piece of the loaded script you want to load, as in

$("#mydiv").load(location.href + " #mydiv");

Note that this technically does load the whole page and jquery removes everything but what you have selected, but that's all done internally.

Just subtract the two datetime values and multiply by 24:

  Select Cast((@DateTime2 - @DateTime1) as Float) * 24.0

a test script might be:

  Declare @Dt1 dateTime Set @Dt1 = '12 Jan 2009 11:34:12'
  Declare @Dt2 dateTime Set @Dt2 = getdate()

  Select Cast((@Dt2 - @Dt1) as Float) * 24.0

This works because all datetimes are stored internally as a pair of integers, the first integer is the number of days since 1 Jan 1900, and the second integer (representing the time) is the number of (1) ticks since Midnight. (For SmallDatetimes the time portion integer is the number of minutes since midnight). Any arithmetic done on the values uses the time portion as a fraction of a day. 6am = 0.25, noon = 0.5, etc... See MSDN link here for more details.

So Cast((@Dt2 - @Dt1) as Float) gives you total days between two datetimes. Multiply by 24 to convert to hours. If you need total minutes, Multiple by Minutes per day (24 * 60 = 1440) instead of 24...

NOTE 1: This is not the same as a dotNet or javaScript tick - this tick is about 3.33 milliseconds.

No, there is no type called "byte" in C++. What you want instead is unsigned char (or, if you need exactly 8 bits, uint8_t from <cstdint>, since C++11). Note that char is not necessarily an accurate alternative, as it means signed char on some compilers and unsigned char on others.

This has been already answered but I tried a different way to make it simpler.

The idea is using putting an ImageButton on the right of EditText and having negative margin to it so that the EditText flows into the ImageButton making it look like the Button is in the EditText.

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">
        <EditText
            android:id="@+id/editText"
            android:layout_weight="1"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:hint="Enter Pin"
            android:singleLine="true"
            android:textSize="25sp"
            android:paddingRight="60dp"
            />
        <ImageButton
            android:id="@+id/pastePin"
            android:layout_marginLeft="-60dp"
            style="?android:buttonBarButtonStyle"
            android:paddingBottom="5dp"
            android:src="@drawable/ic_action_paste"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />
    </LinearLayout>

Also, as shown above, you can use a paddingRight of similar width in the EditText if you don't want the text in it to be flown over the ImageButton.

I guessed margin size with the help of android-studio's layout designer and it looks similar across all screen sizes. Or else you can calculate the width of the ImageButton and set the margin programatically.

You can use this:

function str_replace_once($str_pattern, $str_replacement, $string){ 

        if (strpos($string, $str_pattern) !== false){ 
            $occurrence = strpos($string, $str_pattern); 
            return substr_replace($string, $str_replacement, strpos($string, $str_pattern), strlen($str_pattern)); 
        } 

        return $string; 
    } 

Found this example from php.net

Usage:

$string = "Thiz iz an examplz";
var_dump(str_replace_once('z','Z', $string)); 

Output:

ThiZ iz an examplz

This may reduce the performance a little bit, but the easiest solution.

The answer is a simple PowerShell one-liner:

Get-WmiObject Win32_NetworkConnection | ft "RemoteName","LocalName" -A

If you only want to pull the UNC for one particular drive, add a where statement:

Get-WmiObject Win32_NetworkConnection | where -Property 'LocalName' -eq 'Z:'  | ft "RemoteName","LocalName" -A

TL;DR

Use FLOAT(8,5) if you're not working in NASA / military and not making aircrafts navi systems.

To answer your question fully, you'd need to consider several things:

Format

• degrees minutes seconds: 40° 26' 46" N 79° 58' 56" W
• degrees decimal minutes: 40° 26.767' N 79° 58.933' W
• decimal degrees 1: 40.446° N 79.982° W
• decimal degrees 2: -32.60875, 21.27812
• Some other home-made format? Noone forbids you from making your own home-centric coordinates system and store it as heading and distance from your home. This could make sense for some specific problems you're working on.

So the first part of the answer would be - you can store the coordinates in the format your application uses to avoid constant conversions back and forth and make simpler SQL queries.

Most probably you use Google Maps or OSM to display your data, and GMaps are using "decimal degrees 2" format. So it will be easier to store coordinates in the same format.

Precision

Then, you'd like to define precision you need. Of course you can store coordinates like "-32.608697550570334,21.278081997935146", but have you ever cared about millimeters while navigation to the point? If you're not working in NASA and not doing satellites or rockets or planes trajectories, you should be fine with several meters accuracy.

Commonly used format is 5 digits after dots which gives you 50cm accuracy.

Example: there is 1cm distance between X,21.2780818 and X,21.2780819. So 7 digits after dot give you 1/2cm precision and 5 digits after dot will give you 1/2 meters precision (because minimal distance between distinct points is 1m, so rounding error cannot be more than half of it). For most civil purposes it should be enough.

degrees decimal minutes format (40° 26.767' N 79° 58.933' W) gives you exactly the same precision as 5 digits after dot

Space-efficient storage

If you've selected decimal format, then your coordinate is a pair (-32.60875, 21.27812). Obviously, 2 x (1 bit for sign, 2 digits for degrees and 5 digits for exponent) will be enough.

So here I'd like to support Alix Axel from comments saying that Google suggestion to store it in FLOAT(10,6) is really extra, because you don't need 4 digits for main part (since sign is separated and latitude is limited to 90 and longitude is limited to 180). You can easily use FLOAT(8,5) for 1/2m precision or FLOAT(9,6) for 50/2cm precision. Or you can even store lat and long in separated types, because FLOAT(7,5) is enough for lat. See MySQL float types reference. Any of them will be like normal FLOAT and equal to 4 bytes anyway.

Usually space is not an issue nowadays, but if you want to really optimize the storage for some reason (Disclaimer: don't do pre-optimization), you may compress lat(no more than 91 000 values + sign) + long(no more than 181 000 values + sign) to 21 bits which is significantly less than 2xFLOAT (8 bytes == 64 bits)

Just use the *args parameter, which allows you to pass as many arguments as you want after your a,b,c. You would have to add some logic to map args->c,d,e,f but its a "way" of overloading.

def myfunc(a,b, *args, **kwargs):
   for ar in args:
      print ar
myfunc(a,b,c,d,e,f)

And it will print values of c,d,e,f

Similarly you could use the kwargs argument and then you could name your parameters.

def myfunc(a,b, *args, **kwargs):
      c = kwargs.get('c', None)
      d = kwargs.get('d', None)
      #etc
myfunc(a,b, c='nick', d='dog', ...)

And then kwargs would have a dictionary of all the parameters that are key valued after a,b

Put i++ somewhere at the end of your loop.

In the above code, the 0 position of the array is overwritten because i is not incremented in each loop.

FYI: the below is doing a redundant search:

if(keys[i].equals(DATE)){                 
   date_value[i] = map.get(keys[i]);              
} else if(keys[i].equals(VALUE)){              
   value_values[i] = map.get(keys[i]);             
} 

replace with

if(keys[i].equals(DATE)){                 
   date_value[i] = mapping.getValue();
} else if(keys[i].equals(VALUE)){              
   value_values[i] = mapping.getValue()
} 

Another issue is that you are using i for date_value and value_values. This is not valid unless you intend to have null values in your array.

Router in Angular 2 RC no longer defines isRouteActive and generate methods.

urlTree - Returns the current url tree.

createUrlTree(commands: any[], segment?: RouteSegment) - Applies an array of commands to the current url tree and creates a new url tree.

Try following

<li 
[class.active]=
"router.urlTree.contains(router.createUrlTree(['/SignIn', this.routeSegment]))">

notice, routeSegment : RouteSegment must be injected into component's constructor.

Use a for loop to iterate through your array. For each string, create a new option element, assign the string as its innerHTML and value, and then append it to the select element.

var cuisines = ["Chinese","Indian"];     
var sel = document.getElementById('CuisineList');
for(var i = 0; i < cuisines.length; i++) {
    var opt = document.createElement('option');
    opt.innerHTML = cuisines[i];
    opt.value = cuisines[i];
    sel.appendChild(opt);
}

DEMO

UPDATE: Using createDocumentFragment and forEach

If you have a very large list of elements that you want to append to a document, it can be non-performant to append each new element individually. The DocumentFragment acts as a light weight document object that can be used to collect elements. Once all your elements are ready, you can execute a single appendChild operation so that the DOM only updates once, instead of n times.

var cuisines = ["Chinese","Indian"];     

var sel = document.getElementById('CuisineList');
var fragment = document.createDocumentFragment();

cuisines.forEach(function(cuisine, index) {
    var opt = document.createElement('option');
    opt.innerHTML = cuisine;
    opt.value = cuisine;
    fragment.appendChild(opt);
});

sel.appendChild(fragment);

DEMO

Command where or frame can be used. where command will give more info with the function name

Yeah, it's pretty simple:

input[type="submit"]{
  background: #fff;
  border: 1px solid #000;
  text-shadow: 1px 1px 1px #000;
}

I recommend giving it an ID or a class so that you can target it more easily.

I might approach it like so (CSS and HTML):

html,_x000D_
body {_x000D_
  margin: 0px;_x000D_
}_x000D_
#logo {_x000D_
  position: absolute; /* Reposition logo from the natural layout */_x000D_
  left: 75px;_x000D_
  top: 0px;_x000D_
  width: 300px;_x000D_
  height: 200px;_x000D_
  z-index: 2;_x000D_
}_x000D_
#content {_x000D_
  margin-top: 100px; /* Provide buffer for logo */_x000D_
}_x000D_
#links {_x000D_
  height: 75px;_x000D_
  margin-left: 400px; /* Flush links (with a 25px "padding") right of logo */_x000D_
}

<div id="logo">_x000D_
  <img src="https://via.placeholder.com/200x100" />_x000D_
</div>_x000D_
<div id="content">_x000D_
  _x000D_
  <div id="links">dssdfsdfsdfsdf</div>_x000D_
</div>

The items with code "200 (cache)" were fulfilled directly from your browser cache, meaning that the original requests for the items were returned with headers indicating that the browser could cache them (e.g. future-dated Expires or Cache-Control: max-age headers), and that at the time you triggered the new request, those cached objects were still stored in local cache and had not yet expired.

304s, on the other hand, are the response of the server after the browser has checked if a file was modified since the last version it had cached (the answer being "no").

For most optimal web performance, you're best off setting a far-future Expires: or Cache-Control: max-age header for all assets, and then when an asset needs to be changed, changing the actual filename of the asset or appending a version string to requests for that asset. This eliminates the need for any request to be made unless the asset has definitely changed from the version in cache (no need for that 304 response). Google has more details on correct use of long-term caching.

Our array of objects

var someData = [
   {firstName: "Max", lastName: "Mustermann", age: 40},
   {firstName: "Hagbard", lastName: "Celine", age: 44},
   {firstName: "Karl", lastName: "Koch", age: 42},
];

with for...in

var employees = {
    accounting: []
};

for(var i in someData) {    

    var item = someData[i];   

    employees.accounting.push({ 
        "firstName" : item.firstName,
        "lastName"  : item.lastName,
        "age"       : item.age 
    });
}

or with Array.prototype.map(), which is much cleaner:

var employees = {
    accounting: []
};

someData.map(function(item) {        
   employees.accounting.push({ 
        "firstName" : item.firstName,
        "lastName"  : item.lastName,
        "age"       : item.age 
    });
}

The answers here don't seem to quite cover checking the children exactly. node and object are too permissive, I wanted to check the exact element. Here is what I ended up using:

• Use oneOfType([]) to allow for single or array of children
• Use shape and arrayOf(shape({})) for single and array of children, respectively
• Use oneOf for the child element itself

In the end, something like this:

import PropTypes from 'prop-types'
import MyComponent from './MyComponent'

children: PropTypes.oneOfType([
  PropTypes.shape({
    type: PropTypes.oneOf([MyComponent]),
  }),
  PropTypes.arrayOf(
    PropTypes.shape({
      type: PropTypes.oneOf([MyComponent]),
    })
  ),
]).isRequired

This issue helped me figure this out more clearly: https://github.com/facebook/react/issues/2979

Not only is it not evil, it is sometimes essential. For example, it would be impossible to implement the [] operator of std::vector without using a reference return value.

OK, first of all, you don't have to get a reference to the module into a different name; you already have a reference (from the import) and you can just use it. If you want a different name just use import swineflu as f.

Second, you are getting a reference to the class rather than instantiating the class.

So this should be:

import swineflu

fibo = swineflu.fibo()  # get an instance of the class
fibo.f()                # call the method f of the instance

A bound method is one that is attached to an instance of an object. An unbound method is, of course, one that is not attached to an instance. The error usually means you are calling the method on the class rather than on an instance, which is exactly what was happening in this case because you hadn't instantiated the class.

good.append(x) if x in goodvals else bad.append(x)

This elegant and concise answer by @dansalmo showed up buried in the comments, so I'm just reposting it here as an answer so it can get the prominence it deserves, especially for new readers.

Complete example:

good, bad = [], []
for x in my_list:
    good.append(x) if x in goodvals else bad.append(x)

This was a developer mistake - a misplaced ending brace, which made the above function a nested function.

I see a lot of questions related to the undefined function error in SO. Let me note down this as an answer, in case someone else have the same issue with function scope.

Things I tried to troubleshoot first:

1. Searched for the php file with the function definition in it. Verified that the file exists.
2. Verified that the require (or include) statement for the above file exists in the page. Also, verified the absolute path in the require/include is correct.
3. Verified that the filename is spelled correctly in the require statement.
4. Echoed a word in the included file, to see if it has been properly included.
5. Defined a separate function at the end of file, and called it. It worked too.

It was difficult to trace the braces, since the functions were very long - problem with legacy systems. Further steps to troubleshoot were this:

1. I already defined a simple print function at the end of included file. I moved it to just above the "undefined function". That made it undefined too.

2. Identified this as some scope issue.

3. Used the Netbeans collapse (code fold) feature to check the function just above this one. So, the 1000 lines function above just collapsed along with this one, making this a nested function.

4. Once the problem identified, cut-pasted the function to the end of file, which solved the issue.

As Lamak pointed out in the comment, COALESCE(column, CAST(0 AS BIGINT)) resolves the error.

x = float(raw_input("enter number between 0 and 1: "))

p = 0
while ((2**p)*x) %1 != 0:
    p += 1
    # print p

    num = int (x * (2 ** p))
    # print num

    result = ''
    if num == 0:
        result = '0'
    while num > 0:
        result = str(num%2) + result
        num = num / 2

    for i in range (p - len(result)):
        result = '0' + result
    result = result[0:-p] + '.' + result[-p:]

print result #this will print result for the decimal portion

Sometime would be better use name of parent class instead name of table:

# Refers to the current class
self.class.unscoped.where(self.class.primary_key => id).update_all(created _at: timestamp)

For example "Person" base class, subclasses (and database tables) "Client" and "Seller" Instead using:

Client.where(self.class.primary_key => id).update_all(created _at: timestamp)
Seller.where(self.class.primary_key => id).update_all(created _at: timestamp)

You can use object of base class by this way:

person.class.unscoped.where(self.class.primary_key => id).update_all(created _at: timestamp)

An alternative solution for invalidating JWTs, without any additional secure storage on the backend, is to implement a new jwt_version integer column on the users table. If the user wishes to log out or expire existing tokens, they simply increment the jwt_version field.

When generating a new JWT, encode the jwt_version into the JWT payload, optionally incrementing the value beforehand if the new JWT should replace all others.

When validating the JWT, the jwt_version field is compared alongside the user_id and authorisation is granted only if it matches.

First Suggestion:

Create a Javascript Variable that will reference the button clicked. Lets call it buttonIndex

<input type="submit" onclick="buttonIndex=0;" name="save" value="Save" />
<input type="submit" onclick="buttonIndex=1;" name="saveAndAdd" value="Save and add another" />

Now, you can access that value. 0 means the save button was clicked, 1 means the saveAndAdd Button was clicked.

Second Suggestion

The way I would handle this is to create two JS functions that handle each of the two buttons.

First, make sure your form has a valid ID. For this example, I'll say the ID is "myForm"

change

<input type="submit" name="save" value="Save" />
<input type="submit" name="saveAndAdd" value="Save and add another" />

to

<input type="submit" onclick="submitFunc();return(false);" name="save" value="Save" />
<input type="submit" onclick="submitAndAddFunc();return(false);" name="saveAndAdd" value="Save and add 

the return(false) will prevent your form submission from actually processing, and call your custom functions, where you can submit the form later on.

Then your functions will work something like this...

function submitFunc(){
    // Do some asyncrhnous stuff, that will later on submit the form
    if (okToSubmit) {
        document.getElementById('myForm').submit();
    }
}
function submitAndAddFunc(){
    // Do some asyncrhnous stuff, that will later on submit the form
    if (okToSubmit) {
        document.getElementById('myForm').submit();
    }
}

Since this answer still gets voted up, I want to point out that you should almost never need to look in the header files. If you want to write reliable code, you're much better served by looking in the standard. A better question than "how is off_t defined on my machine" is "how is off_t defined by the standard?". Following the standard means that your code will work today and tomorrow, on any machine.

In this case, off_t isn't defined by the C standard. It's part of the POSIX standard, which you can browse here.

Unfortunately, off_t isn't very rigorously defined. All I could find to define it is on the page on sys/types.h:

blkcnt_t and off_t shall be signed integer types.

This means that you can't be sure how big it is. If you're using GNU C, you can use the instructions in the answer below to ensure that it's 64 bits. Or better, you can convert to a standards defined size before putting it on the wire. This is how projects like Google's Protocol Buffers work (although that is a C++ project).

So, I think "where do I find the definition in my header files" isn't the best question. But, for completeness here's the answer:

On my machine (and most machines using glibc) you'll find the definition in bits/types.h (as a comment says at the top, never directly include this file), but it's obscured a bit in a bunch of macros. An alternative to trying to unravel them is to look at the preprocessor output:

#include <stdio.h>
#include <sys/types.h>

int main(void) {
  off_t blah;

  return 0;
}

And then:

$ gcc -E sizes.c  | grep __off_t
typedef long int __off_t;
....

However, if you want to know the size of something, you can always use the sizeof() operator.

Edit: Just saw the part of your question about the __. This answer has a good discussion. The key point is that names starting with __ are reserved for the implementation (so you shouldn't start your own definitions with __).

Further to @Udi post this is what the script tried to do, but did not work with me.

I had to the set the following in the PATH nothing else.

C:\Users\hUTBER\AppData\Local\Programs\Python\Python35
C:\Users\hUTBER\AppData\Local\Programs\Python\Python35\Scripts

Were mine and now python works in the cmd

One Solution can be this, but not optimul (The complexity of this code is O(n^2)):

public class FindPairsEqualToSum {

private static int inputSum = 0;

public static List<String> findPairsForSum(int[] inputArray, int sum) {
    List<String> list = new ArrayList<String>();
    List<Integer> inputList = new ArrayList<Integer>();
    for (int i : inputArray) {
        inputList.add(i);
    }
    for (int i : inputArray) {
        int tempInt = sum - i;
        if (inputList.contains(tempInt)) {
            String pair = String.valueOf(i + ", " + tempInt);
            list.add(pair);
        }
    }
    return list;
   }
}

There are two basic ways:

url(../../images/image.png)

or

url(/Web/images/image.png)

I prefer the latter, as it's easier to work with and works from all locations in the site (so useful for inline image paths too).

Mind you, I wouldn't do so much deep nesting of folders. It seems unnecessary and makes life a bit difficult, as you've found.

#!/bin/bash
filename=program.c
name=$(basename "$filename" .c)
echo "$name"

outputs:

program

From here:

SELECT *
INTO new_table_name [IN externaldatabase] 
FROM old_tablename

\b matches a word-boundary. \B matches non-word-boundaries, and is equivalent to [^\b](?!\b) _{^{(thanks to @Alan Moore for the correction!)}}. Both are zero-width.

See http://www.regular-expressions.info/wordboundaries.html for details. The site is extremely useful for many basic regex questions.

There is actuly a difference between array object and JSON object. Instead of creating array object and converting it into a json object(with JSON.stringify(arr)) you can do this:

var sels = //Here is your array of SELECTs
var json = { };

for(var i = 0, l = sels.length; i < l; i++) {
  json[sels[i].id] = sels[i].value;
}

There is no need of converting it into JSON because its already a json object. To view the same use json.toSource();

You can set height and width like this also:

viewinstance.setLayoutParams(new LayoutParams(width, height));

It is possible to apply the specific GridView / Table layout via custom CSS rules (as it was discussed in the <table><tbody> scrollable? thread) to fix GridView's Header. However, this approach will not work in all browsers. The 3-rd ASP.NET GridView controls (such as the ASPxGridView from DevExpress component vendor provide this functionality.

Check also the following CodeProject solutions:

• Fixed header Grid

• Gridview with fixed header

• Gridview Fixed Header

Change the customBinding in the web.config to use larger defaults. I picked 2MB as it is a reasonable size. Of course setting it to 2GB (as your code suggests) will work but it does leave you more vulnerable to attacks. Pick a size that is larger than your largest request but isn't overly large.

Check this : Using Large Message Requests in Silverlight with WCF

<system.serviceModel>
   <behaviors>
     <serviceBehaviors>
       <behavior name="TestLargeWCF.Web.MyServiceBehavior">
         <serviceMetadata httpGetEnabled="true"/>
         <serviceDebug includeExceptionDetailInFaults="false"/>
       </behavior>
     </serviceBehaviors>
   </behaviors>
   <bindings>
     <customBinding>
       <binding name="customBinding0">
         <binaryMessageEncoding />
         <!-- Start change -->
         <httpTransport maxReceivedMessageSize="2097152"
                        maxBufferSize="2097152"
                        maxBufferPoolSize="2097152"/>
         <!-- Stop change -->
       </binding>
     </customBinding>
   </bindings>
   <serviceHostingEnvironment aspNetCompatibilityEnabled="true"/>
   <services>
     <service behaviorConfiguration="Web.MyServiceBehavior" name="TestLargeWCF.Web.MyService">
       <endpoint address=""
                binding="customBinding"
                bindingConfiguration="customBinding0"
                contract="TestLargeWCF.Web.MyService"/>
       <endpoint address="mex"
                binding="mexHttpBinding"
                contract="IMetadataExchange"/>
     </service>
   </services>
 </system.serviceModel> 

Here is something I learnt after a long time of having issues with pip when I had several versions of Python installed (valid especially for OS X users which are probably using brew to install python blends.)

I assume that most python developers do have at the beginning of their scripts:

#!/bin/env python

You may be surprised to find out that this is not necessarily the same python as the one you run from the command line >python

To be sure you install the package using the correct pip instance for your python interpreter you need to run something like:

>/bin/env python -m pip install --upgrade mymodule

Fortran has better I/O routines, e.g. the implied do facility gives flexibility that C's standard library can't match.

The Fortran compiler directly handles the more complex syntax involved, and as such syntax can't be easily reduced to argument passing form, C can't implement it efficiently.

As mentioned in earlier responses, this error can occur when interacting with a SOAP service over an HTTPS connection, and an issue is identified with the connection. The issue may be on the remote end (invalid cert) or on the client (in case of missing CA or PEM files). See http://php.net/manual/en/context.ssl.php for all possible SSL context settings. In my case, setting the path to my local certificate resolved the issue:

$context = ['ssl' => [
    'local_cert' => '/path/to/pem/file',
]];

$params = [
    'soap_version' => SOAP_1_2, 
    'trace' => 1, 
    'exceptions' => 1, 
    'connection_timeout' => 180, 
    'stream_context' => stream_context_create($context), 
    'cache_wsdl' => WSDL_CACHE_NONE, // eliminate possible issue from cached wsdl
];

$client = new SoapClient('https://remoteservice/wsdl', $params);

Must try. In below query, you can see group by, order by, Skip rows, and limit rows.

select emp_no , sum(salary_amount) from emp_salary
Group by emp_no 
ORDER BY emp_no 
OFFSET 5 ROWS       -- Skip first 5 
FETCH NEXT 10 ROWS ONLY; -- limit to retrieve next 10 row after skiping rows

A hook is functionality provided by software for users of that software to have their own code called under certain circumstances. That code can augment or replace the current code.

In the olden days when computers were truly personal and viruses were less prevalent (I'm talking the '80's), it was as simple as patching the operating system software itself to call your code. I remember writing an extension to the Applesoft BASIC language on the Apple II which simply hooked my code into the BASIC interpreter by injecting a call to my code before any of the line was processed.

Some computers had pre-designed hooks, one example being the I/O stream on the Apple II. It used such a hook to inject the whole disk sub-system (Apple II ROMs were originally built in the days where cassettes were the primary storage medium for PCs). You controlled the disks by printing the ASCII code 4 (CTRL-D) followed by the command you wanted to execute then a CR, and it was intercepted by the disk sub-system, which had hooked itself into the Apple ROM print routines.

So for example, the lines:

PRINT CHR(4);"CATALOG"
PRINT CHR(4);"IN#6"

would list the disk contents then re-initialize the machine. This allowed such tricks as protecting your BASIC programs by setting the first line as:

123 REM XIN#6

then using POKE to insert the CTRL-D character in where the X was. Then, anyone trying to list your source would send the re-initialize sequence through the output routines where the disk sub-system would detect it.

That's often the sort of trickery we had to resort to, to get the behavior we wanted.

Nowadays, with the operating system more secure, it provides facilities for hooks itself, since you're no longer supposed to modify the operating system "in-flight" or on the disk.

They've been around for a long time. Mainframes had them (called exits) and a great deal of mainframe software uses those facilities even now. For example, the free source code control system that comes with z/OS (called SCLM) allows you to entirely replace the security subsystem by simply placing your own code in the exit.

From the stack trace it's clear that, the ThreadPoolExecutor > Worker thread started and it's waiting for the task to be available on the BlockingQueue(DelayedWorkQueue) to pick the task and execute.So this thread will be in WAIT status only as long as get a SIGNAL from the publisher thread.

Use percent-encoded form. Some (mainly old) computers running Windows XP for example do not support Unicode, but rather ISO encodings. That is the reason percent-encoded URLs were invented. Also, if you give a URL printed on paper to a user, containing characters that cannot be easily typed, that user may have a hard time typing it (or just ignore it). Percent-encoded form can even be used in many of the oldest machines that ever existed (although they don't support internet of course).

There is a downside though, as percent-encoded characters are longer than the original ones, thus possibly resulting in really long URLs. But just try to ignore it, or use a URL shortener (I would recommend goo.gl in this case, which makes a 13-character long URL). Also, if you don't want to register for a Google account, try bit.ly (bit.ly makes slightly longer URLs, with the length being 14 characters).

Try creating another SQL view instead of a temporary table and then referencing it in the main SQL view. In other words, a view within a view. You can then drop the first view once you are done creating the main view.

I believe that the correct answer would be to make the two numbers (BigDecimals), have the same scale, then we can decide about their equality. For example, are these two numbers equal?

1.00001 and 1.00002

Well, it depends on the scale. On the scale 5 (5 decimal points), no they are not the same. but on smaller decimal precisions (scale 4 and lower) they are considered equal. So I suggest make the scale of the two numbers equal and then compare them.

You can change the Authentication if u are running on Windows by reconfiguring the installation by running the msi. It will ask for changing the default authentication to legacy, then u can proceed with that option to change the authentication to the legacy one.

libs and Assets folder in Android Studio:

Create libs folder inside app folder and Asset folder inside main in the project directory by exploring project directory.

Now come back to Android Studio and switch the combo box from Android to Project. enjoy...

Static methods are useful if you have only one instance (situation, circumstance) where you're going to use the method, and you don't need multiple copies (objects). For example, if you're writing a method that logs onto one and only one web site, downloads the weather data, and then returns the values, you could write it as static because you can hard code all the necessary data within the method and you're not going to have multiple instances or copies. You can then access the method statically using one of the following:

MyClass.myMethod();
this.myMethod();
myMethod();

Non-static methods are used if you're going to use your method to create multiple copies. For example, if you want to download the weather data from Boston, Miami, and Los Angeles, and if you can do so from within your method without having to individually customize the code for each separate location, you then access the method non-statically:

MyClass boston = new MyClassConstructor(); 
boston.myMethod("bostonURL");

MyClass miami = new MyClassConstructor(); 
miami.myMethod("miamiURL");

MyClass losAngeles = new MyClassConstructor();
losAngeles.myMethod("losAngelesURL");

In the above example, Java creates three separate objects and memory locations from the same method that you can individually access with the "boston", "miami", or "losAngeles" reference. You can't access any of the above statically, because MyClass.myMethod(); is a generic reference to the method, not to the individual objects that the non-static reference created.

If you run into a situation where the way you access each location, or the way the data is returned, is sufficiently different that you can't write a "one size fits all" method without jumping through a lot of hoops, you can better accomplish your goal by writing three separate static methods, one for each location.

i had the same problem... every time that i wanted to publish my css.. I had to make a search/replace.. and relative path wouldnt work either for me because the relative paths were different from dev to production.

Finally was tired of doing the search/replace and I created a dynamic css, (e.g. www.mysite.com/css.php) it's the same but now i could use my php constants in the css. somethig like

.icon{
  background-image:url('<?php echo BASE_IMAGE;?>icon.png');
}

and it's not a bad idea to make it dynamic because now i could compress it using YUI compressor without loosing the original format on my dev server.

Good Luck!

After doing a git fetch, you can run git status to show how many commits the local branch is ahead or behind of the remote version of the branch.

This won't show you how many commits it is ahead or behind of a different branch though. Your options are the full diff, looking at github, or using a solution like Vimhsa linked above: Git status over all repo's

Short and fast Base64 JavaScript Decode Function without Failsafe:

function decode_base64 (s)
{
    var e = {}, i, k, v = [], r = '', w = String.fromCharCode;
    var n = [[65, 91], [97, 123], [48, 58], [43, 44], [47, 48]];

    for (z in n)
    {
        for (i = n[z][0]; i < n[z][1]; i++)
        {
            v.push(w(i));
        }
    }
    for (i = 0; i < 64; i++)
    {
        e[v[i]] = i;
    }

    for (i = 0; i < s.length; i+=72)
    {
        var b = 0, c, x, l = 0, o = s.substring(i, i+72);
        for (x = 0; x < o.length; x++)
        {
            c = e[o.charAt(x)];
            b = (b << 6) + c;
            l += 6;
            while (l >= 8)
            {
                r += w((b >>> (l -= 8)) % 256);
            }
         }
    }
    return r;
}

When calling a function that is declared with throws in Swift, you must annotate the function call site with try or try!. For example, given a throwing function:

func willOnlyThrowIfTrue(value: Bool) throws {
  if value { throw someError }
}

this function can be called like:

func foo(value: Bool) throws {
  try willOnlyThrowIfTrue(value)
}

Here we annotate the call with try, which calls out to the reader that this function may throw an exception, and any following lines of code might not be executed. We also have to annotate this function with throws, because this function could throw an exception (i.e., when willOnlyThrowIfTrue() throws, then foo will automatically rethrow the exception upwards.

If you want to call a function that is declared as possibly throwing, but which you know will not throw in your case because you're giving it correct input, you can use try!.

func bar() {
  try! willOnlyThrowIfTrue(false)
}

This way, when you guarantee that code won't throw, you don't have to put in extra boilerplate code to disable exception propagation.

try! is enforced at runtime: if you use try! and the function does end up throwing, then your program's execution will be terminated with a runtime error.

Most exception handling code should look like the above: either you simply propagate exceptions upward when they occur, or you set up conditions such that otherwise possible exceptions are ruled out. Any clean up of other resources in your code should occur via object destruction (i.e. deinit()), or sometimes via defered code.

func baz(value: Bool) throws {

  var filePath = NSBundle.mainBundle().pathForResource("theFile", ofType:"txt")
  var data = NSData(contentsOfFile:filePath)

  try willOnlyThrowIfTrue(value)

  // data and filePath automatically cleaned up, even when an exception occurs.
}

If for whatever reason you have clean up code that needs to run but isn't in a deinit() function, you can use defer.

func qux(value: Bool) throws {
  defer {
    print("this code runs when the function exits, even when it exits by an exception")
  }

  try willOnlyThrowIfTrue(value)
}

Most code that deals with exceptions simply has them propagate upward to callers, doing cleanup on the way via deinit() or defer. This is because most code doesn't know what to do with errors; it knows what went wrong, but it doesn't have enough information about what some higher level code is trying to do in order to know what to do about the error. It doesn't know if presenting a dialog to the user is appropriate, or if it should retry, or if something else is appropriate.

Higher level code, however, should know exactly what to do in the event of any error. So exceptions allow specific errors to bubble up from where they initially occur to the where they can be handled.

Handling exceptions is done via catch statements.

func quux(value: Bool) {
  do {
    try willOnlyThrowIfTrue(value)
  } catch {
    // handle error
  }
}

You can have multiple catch statements, each catching a different kind of exception.

  do {
    try someFunctionThatThowsDifferentExceptions()
  } catch MyErrorType.errorA {
    // handle errorA
  } catch MyErrorType.errorB {
    // handle errorB
  } catch {
    // handle other errors
  }

For more details on best practices with exceptions, see http://exceptionsafecode.com/. It's specifically aimed at C++, but after examining the Swift exception model, I believe the basics apply to Swift as well.

For details on the Swift syntax and error handling model, see the book The Swift Programming Language (Swift 2 Prerelease).

Did you see this? If I haven't misunderstand that answer, you may try to create a new virtualenv on top of the old one. You just need to know which python is going to use your virtualenv (you will need to see your virtualenv version).

If your virtualenv is installed with the same python version of the old one and upgrading your virtualenv package is not an option, you may want to read this in order to install a virtualenv with the python version you want.

EDIT

I've tested this approach (the one that create a new virtualenv on top of the old one) and it worked fine for me. I think you may have some problems if you change from python 2.6 to 2.7 or 2.7 to 3.x but if you just upgrade inside the same version (staying at 2.7 as you want) you shouldn't have any problem, as all the packages are held in the same folders for both python versions (2.7.x and 2.7.y packages are inside your_env/lib/python2.7/).

If you change your virtualenv python version, you will need to install all your packages again for that version (or just link the packages you need into the new version packages folder, i.e: your_env/lib/python_newversion/site-packages)

If you want only digits:

var value = '675-805-714';
var numberPattern = /\d+/g;
value = value.match( numberPattern ).join([]);
alert(value);
//Show: 675805714

Now you get the digits joined

(Android Studio 3.5) If you're a recent version of Android Studio, you can generate your notification images. Right click on your res folder > New > Image Asset. You will then see Configure Image Assets as shown in the image below. Change Icon Type to Notification Icons. Your images must be white and transparent. This Configure Image Assets will enforce that rule. Important: If you want the icons to be used for cloud/push notifications, you must add the meta-data under your application tag to use the newly created notification icons.

  <application>
      ...
      <meta-data android:name="com.google.firebase.messaging.default_notification_icon"
          android:resource="@drawable/ic_notification" />

You have to give height and width to that image.

eg. height : 200px and width : 200px also give border-radius:50%;

to create circle you have to give equal height and width

if you are using bootstrap then give height and width and img-circle class to img

There is a really informative article in the actual Oracle Java magazine about using Docker in combination with Vagrant (and Puppet):

Conclusion

Docker’s lightweight containers are faster compared with classic VMs and have become popular among developers and as part of CD and DevOps initiatives. If your purpose is isolation, Docker is an excellent choice. Vagrant is a VM manager that enables you to script configurations of individual VMs as well as do the provisioning. However, it is sill a VM dependent on VirtualBox (or another VM manager) with relatively large overhead. It requires you to have a hard drive idle that can be huge, it takes a lot of RAM, and performance can be suboptimal. Docker uses kernel cgroups and namespace isolation via LXC. This means that you are using the same kernel as the host and the same ile system. Vagrant is a level above Docker in terms of abstraction, so they are not really comparable. Configuration management tools such as Puppet are widely used for provisioning target environments. Reusing existing Puppet-based solutions is easy with Docker. You can also slice your solution, so the infrastructure is provisioned with Puppet; the middleware, the business application itself, or both are provisioned with Docker; and Docker is wrapped by Vagrant. With this range of tools, you can do what’s best for your scenario.

How to build, use and orchestrate Docker containers in DevOps http://www.javamagazine.mozaicreader.com/JulyAug2015#&pageSet=34&page=0

Split a string into lines without any allocation.

public static LineEnumerator GetLines(this string text) {
    return new LineEnumerator( text.AsSpan() );
}

internal ref struct LineEnumerator {

    private ReadOnlySpan<char> Text { get; set; }
    public ReadOnlySpan<char> Current { get; private set; }

    public LineEnumerator(ReadOnlySpan<char> text) {
        Text = text;
        Current = default;
    }

    public LineEnumerator GetEnumerator() => this;

    public bool MoveNext() {
        if (Text.IsEmpty) return false;

        var index = Text.IndexOf( '\n' ); // \r\n or \n
        if (index != -1) {
            Current = Text.Slice( 0, index + 1 );
            Text = Text.Slice( index + 1 );
            return true;
        } else {
            Current = Text;
            Text = ReadOnlySpan<char>.Empty;
            return true;
        }
    }


}

It would be ideal if you could set parameters on the same line as your call to start Node.js on Windows. Look at the following carefully, and run it exactly as stated:

You have these two options:

1. At the command line:

   set NODE_ENV=production&&npm start
   

   or

   set NODE_ENV=production&&node index.js
   

2. The trick for it to work on Windows is you need to remove the whitespace before and after the "&&". Configured your package.json file with start_windows (see below) below. Then Run "npm run start_windows" at the command line.

   //package.json
   
   "scripts": {
     "start": "node index.js"
     "start_windows": "set NODE_ENV=production&&node index.js"
   }
   

StringUtils.isBlank() returns true for blanks(just whitespaces)and for null String as well. Actually it trims the Char sequences and then performs check.

StringUtils.isEmpty() returns true when there is no charsequence in the String parameter or when String parameter is null. Difference is that isEmpty() returns false if String parameter contains just whiltespaces. It considers whitespaces as a state of being non empty.

101 Word Intro

Camel is a framework with a consistent API and programming model for integrating applications together. The API is based on theories in Enterprise Integration Patterns - i.e., bunch of design patterns that tend to use messaging. It provides out of the box implementations of most of these patterns, and additionally ships with over 200 different components you can use to easily talk to all kinds of other systems. To use Camel, first write your business logic in POJOs and implement simple interfaces centered around messages. Then use Camel’s DSL to create "Routes" which are sets of rules for gluing your application together.

Extended Intro

On the surface, Camel's functionality rivals traditional Enterprise Service Bus products. We typically think of a Camel Route being a "mediation" (aka orchestration) component that lives on the server side, but because it's a Java library it’s easy to embed and it can live on a client side app just as well and help you integrate it with point to point services (aka choreography). You can even take your POJOs that process the messages inside the Camel route and easily spin them off into their own remote consumer processes, e.g. if you needed to scale just one piece independently. You can use Camel to connect routes or processors through any number of different remote transport/protocols depending on your needs. Do you need an extremely efficient and fast binary protocol, or one that is more human readable and easy to debug? What if you wanted to switch? With Camel this is usually as easy as changing a line or two in your route and not changing any business logic at all. Or you could support both - you’re free to run many Routes at once in a Camel Context.

You don't really need to use Camel for simple applications that are going to live in a single process or JVM - it would be overkill. But it's not conceptually any more difficult than code you may write yourself. And if your requirements change, the separation of business logic and glue code makes it easier to maintain over time. Once you learn the Camel API, it is easy to use it like a Swiss-Army knife and apply it quickly in many different contexts to cut down on the amount of custom code you’d otherwise have to write. You can learn one flavor - the Java DSL, for example, a fluent API that's easy to chain together - and pick up the other flavors easily.

Overall Camel is a great fit if you are trying to do microservices. I have found it invaluable for evolutionary architecture, because you can put off a lot of the difficult, "easy-to-get-wrong" decisions about protocols, transports and other system integration problems until you know more about your problem domain. Just focus on your EIPs and core business logic and switch to new Routes with the "right" components as you learn more.

I suspect wpis.entry.lastChangeDate has been somehow transformed into a string in the view, before arriving to the template.

In order to verify this hypothesis, you may just check in the view if it has some property/method that only strings have - like for instance wpis.entry.lastChangeDate.upper, and then see if the template crashes.

You could also create your own custom filter, and use it for debugging purposes, letting it inspect the object, and writing the results of the inspection on the page, or simply on the console. It would be able to inspect the object, and check if it is really a DateTimeField.

On an unrelated notice, why don't you use models.DateTimeField(auto_now_add=True) to set the datetime on creation?

onResume() is one of the methods called throughout the activity lifecycle. onResume() is the counterpart to onPause() which is called anytime an activity is hidden from view, e.g. if you start a new activity that hides it. onResume() is called when the activity that was hidden comes back to view on the screen.

You're question asks abou what method is used to restart an activity. onCreate() is called when the activity is first created. In practice, most activities persist in the background through a series of onPause() and onResume() calls. An activity is only really "restarted" by onRestart() if it is first fully stopped by calling onStop() and then brought back to life. Thus if you are not actually stopping activities with onStop() it is most likley you will be using onResume().

Read the android doc in the above link to get a better understanding of the relationship between the different lifestyle methods. Regardless of which lifecycle method you end up using the general format is the same. You must override the standard method and include your code, i.e. what you want the activity to do at that point, in the commented section.

@Override
public void onResume(){
 //will be executed onResume
}

As jeremyjjbrow said, :active pseudo won't persist. But there's a hack for doing it on pure css. You can wrap it on a <a> tag, and apply the :active on it, like this:

<a class="test">
    <img class="crossRotate" src="images/cross.png" alt="Cross Menu button" />
 </a>

And the css:

.test:active .crossRotate {
    transform: rotate(45deg);
    -webkit-transform: rotate(45deg);
    -ms-transform: rotate(45deg);
    }

Try it out... It works (at least on Chrome)!

Goyuix's solution works great, but as presented it gives me this error: "The requested FTP command is not supported when using HTTP proxy."

Adding this line after $ftp.UsePassive = $true fixed the problem for me:

$ftp.Proxy = $null;

You can only use - on the numeric entries, so you can use decreasing and negate the ones you want in increasing order:

DT[order(x,-v,decreasing=TRUE),]
      x y v
 [1,] c 1 7
 [2,] c 3 8
 [3,] c 6 9
 [4,] b 1 1
 [5,] b 3 2
 [6,] b 6 3
 [7,] a 1 4
 [8,] a 3 5
 [9,] a 6 6

See here for original post

;
; This is an example of how a Python Launcher .ini file is structured.
; If you want to use it, copy it to py.ini and make your changes there,
; after removing this header comment.
; This file will be removed on launcher uninstallation and overwritten
; when the launcher is installed or upgraded, so don't edit this file
; as your changes will be lost.
;
[defaults]
; Uncomment out the following line to have Python 3 be the default.
;python=3

[commands]
; Put in any customised commands you want here, in the format
; that's shown in the example line. You only need quotes around the
; executable if the path has spaces in it.
;
; You can then use e.g. #!myprog as your shebang line in scripts, and
; the launcher would invoke e.g.
;
; "c:\Program Files\MyCustom.exe" -a -b -c myscript.py
;
;myprog="c:\Program Files\MyCustom.exe" -a -b -c

Thus, on my system I made a py.ini file under c:\windows\ where py.exe exists, with the following contents:

[defaults]
python=3

Now when you Double-click on a .py file, it will be run by the new default version. Now I'm only using the Shebang #! python2 on my old scripts.

foo = File or Object. It is used in place of an object variable or file name.

The best way is to close the session is: if there is no response for that session after particular interval of time. then close. Please see this post and I hope it will resolve the issue. "How to change the session timeout in PHP?"

updated might be what you're looking for. https://vuejs.org/v2/api/#updated

I think you can use db.collection.distinct(fields,query)

You will be able to get the distinct values in your case for NetworkID.

It should be something like this :

Db.collection.distinct('NetworkID')

The other advice here didn't help me, but I fixed this error by going to Product > Scheme > Edit Scheme. Then I clicked Build on the left hand side and deselected any checkboxes next to AppNameTests. I'm using XCode 6.3

Here is a util class for marshaling and unmarshaling objects. In my case it was a nested class, so I made it static JAXBUtils.

import javax.xml.bind.JAXB;
import java.io.StringReader;
import java.io.StringWriter;

public class JAXBUtils
{
    /**
     * Unmarshal an XML string
     * @param xml     The XML string
     * @param type    The JAXB class type.
     * @return The unmarshalled object.
     */
    public <T> T unmarshal(String xml, Class<T> type)
    {
        StringReader reader = new StringReader(xml);
        return javax.xml.bind.JAXB.unmarshal(reader, type);
    }

    /**
     * Marshal an Object to XML.
     * @param object    The object to marshal.
     * @return The XML string representation of the object.
     */
    public String marshal(Object object)
    {
        StringWriter stringWriter = new StringWriter();
        JAXB.marshal(object, stringWriter);
        return stringWriter.toString();
    }
}

The problem isn't that null cannot be assigned to an int?. The problem is that both values returned by the ternary operator must be the same type, or one must be implicitly convertible to the other. In this case, null cannot be implicitly converted to int nor vice-versus, so an explict cast is necessary. Try this instead:

int? accom = (accomStr == "noval" ? (int?)null : Convert.ToInt32(accomStr));

function StopWatch() {
    let startTime, endTime, running, duration = 0
    
    this.start = () => {
        if (running) console.log('its already running')
        else {
            running = true
            startTime = Date.now()
        }
    }

    this.stop = () => {
        if (!running) console.log('its not running!')
        else {
            running = false
            endTime = Date.now()

            const seconds = (endTime - startTime) / 1000
            duration += seconds
        }
    }

    this.restart = () => {
        startTime = endTime = null
        running = false
        duration = 0
    }
    
    Object.defineProperty(this, 'duration', {
        get: () => duration.toFixed(2)
    })

}

const sw =  new StopWatch()

sw.start()
sw.stop()

sw.duration

Yes. Blat or any other self contained SMTP mailer. Blat is a fairly full featured SMTP client that runs from command line

Blat is here

I typically perform the validation on the client side:

<asp:checkbox id="chkTerms" text=" I agree to the terms" ValidationGroup="vg" runat="Server"  />
<asp:CustomValidator id="vTerms"
                ClientValidationFunction="validateTerms" 
                ErrorMessage="<br/>Terms and Conditions are required." 
                ForeColor="Red"
                Display="Static"
                EnableClientScript="true"
                ValidationGroup="vg"
                runat="server"/>

<asp:Button ID="btnSubmit" OnClick="btnSubmit_Click" CausesValidation="true" Text="Submit" ValidationGroup="vg" runat="server" />

<script>
    function validateTerms(source, arguments) {
        var $c = $('#<%= chkTerms.ClientID %>');
        if($c.prop("checked")){
            arguments.IsValid = true;
        } else {
            arguments.IsValid = false;
        }
    }
</script>       

You need to checkout the branch:

git checkout master

See the Git cheat sheets for more information.

Edit: Please note that git does not manage empty directories, so you'll have to manage them yourself. If your directory is empty, just remove it directly.

Here is a quick example:

public class One {

    /**
     * @param args
     */
    public static void main(String[] args) {

        double a = 4.56777;
        System.out.println( new Float( Math.round(a)) );

    }

}

the result and output will be: 5.0
the closest upper bound Float to the starting value of double a = 4.56777
in this case the use of round is recommended since it takes in double values and provides whole long values

Regards

An even more efficient way is streaming by asking the operating system’s kernel to open a file, then read bytes from it bit by bit. When reading a file per line in Ruby, data is taken from the file 512 bytes at a time and split up in “lines” after that.

By buffering the file’s content, the number of I/O calls is reduced while dividing the file in logical chunks.

Example:

Add this class to your app as a service object:

class MyIO
  def initialize(filename)
    fd = IO.sysopen(filename)
    @io = IO.new(fd)
    @buffer = ""
  end

  def each(&block)
    @buffer << @io.sysread(512) until @buffer.include?($/)

    line, @buffer = @buffer.split($/, 2)

    block.call(line)
    each(&block)
  rescue EOFError
    @io.close
 end
end

Call it and pass the :each method a block:

filename = './somewhere/large-file-4gb.txt'
MyIO.new(filename).each{|x| puts x }

Read about it here in this detailed post:

Ruby Magic Slurping & Streaming Files By AppSignal

 <html>

 <?php

 echo $_POST['c']." | ".$_POST['d']." | ".$_POST['e'];

 ?>

 <form action="test.php" method="POST">
      <input type="hidden" name="c" value="toto98">
      <input type="hidden" name="d" value="toto97">
      <input type="hidden" name="e" value="toto aaaaaaaaaaaaaaaaaaaa">

      <a href="" onclick="document.forms[0].submit();return false;">Click</a> 
 </form>

</html>


So easy.




So easy.

You can do this with reflection. Specifically, you can use the ReflectionClass::getShortName method, which gets the name of the class without its namespace.

First, you need to build a ReflectionClass instance, and then call the getShortName method of that instance:

$reflect = new ReflectionClass($object);
if ($reflect->getShortName() === 'Name') {
    // do this
}

However, I can't imagine many circumstances where this would be desirable. If you want to require that the object is a member of a certain class, the way to test it is with instanceof. If you want a more flexible way to signal certain constraints, the way to do that is to write an interface and require that the code implement that interface. Again, the correct way to do this is with instanceof. (You can do it with ReflectionClass, but it would have much worse performance.)

$this->db1->where('tennant_id', $tennant_id);
$this->db1->order_by('id', 'DESC');
return $this->db1->get('courses')->result();

Following is the extension method

public static string ToEnumString<TEnum>(this int enumValue)
{
    var enumString = enumValue.ToString();
    if (Enum.IsDefined(typeof(TEnum), enumValue))
    {
        enumString = ((TEnum) Enum.ToObject(typeof (TEnum), enumValue)).ToString();
    }
    return enumString;
}

var text = "Ann@26"

var editedText = text.Replace("@", "\t");

If you have access to manipulate the code of the site you are loading, the following should provide a comprehensive method to updating the height of the iframe container anytime the height of the framed content changes.

Add the following code to the pages you are loading (perhaps in a header). This code sends a message containing the height of the HTML container any time the DOM is updated (if you're lazy loading) or the window is resized (when the user modifies the browser).

window.addEventListener("load", function(){
    if(window.self === window.top) return; // if w.self === w.top, we are not in an iframe 
    send_height_to_parent_function = function(){
        var height = document.getElementsByTagName("html")[0].clientHeight;
        //console.log("Sending height as " + height + "px");
        parent.postMessage({"height" : height }, "*");
    }
    // send message to parent about height updates
    send_height_to_parent_function(); //whenever the page is loaded
    window.addEventListener("resize", send_height_to_parent_function); // whenever the page is resized
    var observer = new MutationObserver(send_height_to_parent_function);           // whenever DOM changes PT1
    var config = { attributes: true, childList: true, characterData: true, subtree:true}; // PT2
    observer.observe(window.document, config);                                            // PT3 
});

Add the following code to the page that the iframe is stored on. This will update the height of the iframe, given that the message came from the page that that iframe loads.

<script>
window.addEventListener("message", function(e){
    var this_frame = document.getElementById("healthy_behavior_iframe");
    if (this_frame.contentWindow === e.source) {
        this_frame.height = e.data.height + "px";
        this_frame.style.height = e.data.height + "px";
    }
})
</script>

You can always start by making a lookup table based on common aspect ratios. Check https://en.wikipedia.org/wiki/Display_aspect_ratio Then you can simply do the division

For real life problems, you can do something like below

let ERROR_ALLOWED = 0.05
let STANDARD_ASPECT_RATIOS = [
  [1, '1:1'],
  [4/3, '4:3'],
  [5/4, '5:4'],
  [3/2, '3:2'],
  [16/10, '16:10'],
  [16/9, '16:9'],
  [21/9, '21:9'],
  [32/9, '32:9'],
]
let RATIOS = STANDARD_ASPECT_RATIOS.map(function(tpl){return tpl[0]}).sort()
let LOOKUP = Object()
for (let i=0; i < STANDARD_ASPECT_RATIOS.length; i++){
  LOOKUP[STANDARD_ASPECT_RATIOS[i][0]] = STANDARD_ASPECT_RATIOS[i][1]
}

/*
Find the closest value in a sorted array
*/
function findClosest(arrSorted, value){
  closest = arrSorted[0]
  closestDiff = Math.abs(arrSorted[0] - value)
  for (let i=1; i<arrSorted.length; i++){
    let diff = Math.abs(arrSorted[i] - value)
    if (diff < closestDiff){
      closestDiff = diff
      closest = arrSorted[i]
    } else {
      return closest
    }
  }
  return arrSorted[arrSorted.length-1]
}

/*
Estimate the aspect ratio based on width x height (order doesn't matter)
*/
function estimateAspectRatio(dim1, dim2){
  let ratio = Math.max(dim1, dim2) / Math.min(dim1, dim2)
  if (ratio in LOOKUP){
    return LOOKUP[ratio]
  }

  // Look by approximation
  closest = findClosest(RATIOS, ratio)
  if (Math.abs(closest - ratio) <= ERROR_ALLOWED){
    return '~' + LOOKUP[closest]
  }

  return 'non standard ratio: ' + Math.round(ratio * 100) / 100 + ':1'
}

Then you simply give the dimensions in any order

estimateAspectRatio(1920, 1080) // 16:9
estimateAspectRatio(1920, 1085) // ~16:9
estimateAspectRatio(1920, 1150) // non standard ratio: 1.65:1
estimateAspectRatio(1920, 1200) // 16:10
estimateAspectRatio(1920, 1220) // ~16:10

Hmm, surprised I don't see this answer yet, suppose I'll throw my hat in the ring.

class Action {
    const cancelable    =   0;
    const target        =   1
    const type          =   2;

    public $cancelable;
    public $target;
    public $type;


    __construct( $opt = [] ){

        $this->cancelable   = isset($opt[cancelable]) ? $opt[cancelable] : true;
        $this->target       = isset($opt[target]) ?     $opt[target] : NULL;
        $this->type         = isset($opt[type]) ?       $opt[type] : 'action';

    }
}


$myAction = new Action( [
    Action::cancelable => false,
    Action::type => 'spin',
    .
    .
    .
]);

You can optionally separate the options into their own class, such as extending SplEnum.

abstract class ActionOpt extends SplEnum{
    const cancelable    =   0;
    const target        =   1
    const type          =   2;
}

From the docs:

_trackTrans() Sends both the transaction and item data to the Google Analytics server. This method should be called after _trackPageview(), and used in conjunction with the _addItem() and addTrans() methods. It should be called after items and transaction elements have been set up.

So, according to the docs, the items get sent when you call trackTrans(). Until you do, you can add items, but the transaction will not be sent.

Edit: Further reading led me here:

http://www.analyticsmarket.com/blog/edit-ecommerce-data

Where it clearly says you can start another transaction with an existing ID. When you commit it, the new items you listed will be added to that transaction.

You can pass multiple arguments to angular filter !

Defining my angular app and and an app level variable -

var app = angular.module('filterApp',[]);
app.value('test_obj', {'TEST' : 'test be check se'});

Your Filter will be like :-

app.filter('testFilter', [ 'test_obj', function(test_obj) {
    function test_filter_function(key, dynamic_data) {
      if(dynamic_data){
        var temp = test_obj[key]; 
        for(var property in dynamic_data){
            temp = temp.replace(property, dynamic_data[property]);
        }
        return temp;
      }
      else{
        return test_obj[key] || key;
      }

    }
    test_filter_function.$stateful = true;
    return test_filter_function;
  }]);

And from HTML you will send data like :-

<span ng-bind="'TEST' | testFilter: { 'be': val, 'se': value2 }"></span>

Here I am sending a JSON object to the filter. You can also send any kind of data like string or number.

also you can pass dynamic number of arguments to filter , in that case you have to use arguments to get those arguments.

For a working demo go here - passing multiple arguments to angular filter

sourceString.Replace(removeString, "");

with a specific dir:

cd your_dir && curl -L https://download.calibre-ebook.com/3.19.0/calibre-3.19.0-x86_64.txz | tar zx

May be you need Decimal

>>> from decimal import Decimal    
>>> Decimal(2.675)
Decimal('2.67499999999999982236431605997495353221893310546875')

Floating Point Arithmetic

I sorted this problem by verifying the json on JSONLint.com and then using Jackson. Below is the code for the same.

 Main Class:-

String jsonStr = "[{\r\n" + "       \"name\": \"John\",\r\n" + "        \"city\": \"Berlin\",\r\n"
                + "         \"cars\": [\r\n" + "            \"FIAT\",\r\n" + "          \"Toyata\"\r\n"
                + "     ],\r\n" + "     \"job\": \"Teacher\"\r\n" + "   },\r\n" + " {\r\n"
                + "     \"name\": \"Mark\",\r\n" + "        \"city\": \"Oslo\",\r\n" + "        \"cars\": [\r\n"
                + "         \"VW\",\r\n" + "            \"Toyata\"\r\n" + "     ],\r\n"
                + "     \"job\": \"Doctor\"\r\n" + "    }\r\n" + "]";

        ObjectMapper mapper = new ObjectMapper();

        MyPojo jsonObj[] = mapper.readValue(jsonStr, MyPojo[].class);

        for (MyPojo itr : jsonObj) {

            System.out.println("Val of getName is: " + itr.getName());
            System.out.println("Val of getCity is: " + itr.getCity());
            System.out.println("Val of getJob is: " + itr.getJob());
            System.out.println("Val of getCars is: " + itr.getCars() + "\n");

        }

POJO:

public class MyPojo {

private List<String> cars = new ArrayList<String>();

private String name;

private String job;

private String city;

public List<String> getCars() {
    return cars;
}

public void setCars(List<String> cars) {
    this.cars = cars;
}

public String getName() {
    return name;
}

public void setName(String name) {
    this.name = name;
}

public String getJob() {
    return job;
}

public void setJob(String job) {
    this.job = job;
}

public String getCity() {
    return city;
}

public void setCity(String city) {
    this.city = city;
} }

  RESULT:-
         Val of getName is: John
         Val of getCity is: Berlin
         Val of getJob is: Teacher
         Val of getCars is: [FIAT, Toyata]

          Val of getName is: Mark
          Val of getCity is: Oslo
          Val of getJob is: Doctor
          Val of getCars is: [VW, Toyata]

maybe this will help you (if the log file exists use it, if it does not exist create it):

package main

import (
    "flag"
    "log"
    "os"
)
//Se declara la variable Log. Esta será usada para registrar los eventos.
var (
    Log *log.Logger = Loggerx()
)

func Loggerx() *log.Logger {
    LOG_FILE_LOCATION := os.Getenv("LOG_FILE_LOCATION")
        //En el caso que la variable de entorno exista, el sistema usa la configuración del docker.
    if LOG_FILE_LOCATION == "" {
        LOG_FILE_LOCATION = "../logs/" + APP_NAME + ".log"
    } else {
        LOG_FILE_LOCATION = LOG_FILE_LOCATION + APP_NAME + ".log"
    }
    flag.Parse()
        //Si el archivo existe se rehusa, es decir, no elimina el archivo log y crea uno nuevo.
    if _, err := os.Stat(LOG_FILE_LOCATION); os.IsNotExist(err) {
        file, err1 := os.Create(LOG_FILE_LOCATION)
        if err1 != nil {
            panic(err1)
        }
                //si no existe,se crea uno nuevo.
        return log.New(file, "", log.Ldate|log.Ltime|log.Lshortfile)
    } else {
                //si existe se rehusa.
        file, err := os.OpenFile(LOG_FILE_LOCATION, os.O_CREATE|os.O_APPEND|os.O_WRONLY, 0666)
        if err != nil {
            panic(err)
        }
        return log.New(file, "", log.Ldate|log.Ltime|log.Lshortfile)
    }
}

For more detail: https://su9.co/9BAE74B

I would like to add something to brilliant @AmiNadimi answer for everyone who going implement his solution in .NET Core 3:

First of all, you should change signature of SignIn method in UserManager class from:

public async void SignIn(HttpContext httpContext, UserDbModel user, bool isPersistent = false)

to:

public async Task SignIn(HttpContext httpContext, UserDbModel user, bool isPersistent = false)

It's because you should never use async void, especially if you work with HttpContext. Source: Microsoft Docs

The last, but not least, your Configure() method in Startup.cs should contains app.UseAuthorization and app.UseAuthentication in proper order:

if (env.IsDevelopment())
{
    app.UseDeveloperExceptionPage();
}
else
{
    app.UseExceptionHandler("/Home/Error");
    // The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
    app.UseHsts();
}

app.UseHttpsRedirection();
app.UseStaticFiles();
app.UseAuthentication();
app.UseRouting();
app.UseAuthorization();
app.UseEndpoints(endpoints =>
{
    endpoints.MapControllerRoute(
        name: "default",
        pattern: "{controller=Home}/{action=Index}/{id?}");
});

Just found a very simple yet working solution, by removing <form></form> from the section I wanted to prevent from posting and refreshing.

<select id="youId" name="yourName">
<select> 
<option value="1</option>
<option value="2</option>
<option value="3</option>
</select>
<input id="formStockVal1" type="number"><br><br>
<form> 
<button type="reset" id="stockCancel">Cancel</button>
<button type="reset" id="stockConfirm">Add</button>
</form>

Here only Buttons submit as they should.

It is not only the table cell which is growing, the table itself can grow, too. To avoid this you can assign a fixed width to the table which in return forces the cell width to be respected:

table {
  table-layout: fixed;
  width: 120px; /* Important */
}
td {
  width: 30px;
}

(Using overflow: hidden and/or text-overflow: ellipsis is optional but highly recommended for a better visual experience)

So if your situation allows you to assign a fixed width to your table, this solution might be a better alternative to the other given answers (which do work with or without a fixed width)

As so many good answers said, an object must implement the Iterable interface if it wants to use a for-each loop.

I'll post a simple example and try to explain in a different way how a for-each loop works.

The for-each loop example:

public class ForEachTest {

    public static void main(String[] args) {

        List<String> list = new ArrayList<String>();
        list.add("111");
        list.add("222");

        for (String str : list) {
            System.out.println(str);
        }
    }
}

Then, if we use javap to decompile this class, we will get this bytecode sample:

public static void main(java.lang.String[]);
    flags: ACC_PUBLIC, ACC_STATIC
    Code:
      stack=2, locals=4, args_size=1
         0: new           #16                 // class java/util/ArrayList
         3: dup
         4: invokespecial #18                 // Method java/util/ArrayList."<init>":()V
         7: astore_1
         8: aload_1
         9: ldc           #19                 // String 111
        11: invokeinterface #21,  2           // InterfaceMethod java/util/List.add:(Ljava/lang/Object;)Z
        16: pop
        17: aload_1
        18: ldc           #27                 // String 222
        20: invokeinterface #21,  2           // InterfaceMethod java/util/List.add:(Ljava/lang/Object;)Z
        25: pop
        26: aload_1
        27: invokeinterface #29,  1           // InterfaceMethod java/util/List.iterator:()Ljava/util/Iterator;

As we can see from the last line of the sample, the compiler will automatically convert the use of for-each keyword to the use of an Iterator at compile time. That may explain why object, which doesn't implement the Iterable interface, will throw an Exception when it tries to use the for-each loop.

If you want all the bars to get the same color (fill), you can easily add it inside geom_bar.

ggplot(data=df, aes(x=c1+c2/2, y=c3)) + 
geom_bar(stat="identity", width=c2, fill = "#FF6666")

Add fill = the_name_of_your_var inside aes to change the colors depending of the variable :

c4 = c("A", "B", "C")
df = cbind(df, c4)
ggplot(data=df, aes(x=c1+c2/2, y=c3, fill = c4)) + 
geom_bar(stat="identity", width=c2)

Use scale_fill_manual() if you want to manually the change of colors.

ggplot(data=df, aes(x=c1+c2/2, y=c3, fill = c4)) + 
geom_bar(stat="identity", width=c2) + 
scale_fill_manual("legend", values = c("A" = "black", "B" = "orange", "C" = "blue"))

The whole point of a class is that you create an instance, and that instance encapsulates a set of data. So it's wrong to say that your variables are global within the scope of the class: say rather that an instance holds attributes, and that instance can refer to its own attributes in any of its code (via self.whatever). Similarly, any other code given an instance can use that instance to access the instance's attributes - ie instance.whatever.

Code to detect the operating system of an user

let os = navigator.userAgent.slice(13).split(';')
os = os[0]

console.log(os)

Windows NT 10.0

Link your custom.css file as the last entry below the bootstrap.css. Custom.css style definitions will override bootstrap.css

Html

<link href="css/bootstrap.min.css" rel="stylesheet">
<link href="css/custom.css" rel="stylesheet">

Copy all style definitions of legend in custom.css and make changes in it (like margin-bottom:5px; -- This will overrider margin-bottom:20px; )

You are close already. Just make sure to hide the checkbox and associate it with a label you style via input[checkbox] + label

Complete Code: http://gist.github.com/592332

JSFiddle: http://jsfiddle.net/4huzr/

I am not completely sure what you're trying to achieve by seeking to a specific offset and attempting to load individual values manually, the typical usage of the pickle module is:

# save data to a file
with open('myfile.pickle','wb') as fout:
    pickle.dump([1,2,3],fout)

# read data from a file
with open('myfile.pickle') as fin:
    print pickle.load(fin)

# output
>> [1, 2, 3]

If you dumped a list, you'll load a list, there's no need to load each item individually.

you're saying that you got an error before you were seeking to the -5000 offset, maybe the file you're trying to read is corrupted.

If you have access to the original data, I suggest you try saving it to a new file and reading it as in the example.

if sys.platform[:3] == "win":
    # First try to use the default Windows browser
    register("windows-default", WindowsDefault)

    # Detect some common Windows browsers, fallback to IE
    iexplore = os.path.join(os.environ.get("PROGRAMFILES", "C:\\Program Files"),
                            "Mozilla Firefox\\FIREFOX.EXE")
    for browser in ("firefox", "firebird", "seamonkey", "mozilla",
                    "netscape", "opera", iexplore):
        if shutil.which(browser):
            register(browser, None, BackgroundBrowser(browser))

100% Work....See line number 535-545..Change the path of iexplore to firefox or Chrome According to your requirement... in my case change path I Mention in the above code for firefox setting......

You could create a new repo with

git init 

and then use

git fetch url-to-repo branchname:refs/remotes/origin/branchname

to fetch just that one branch into a local remote-tracking branch.

I just built a sandbox environment with your code and it worked for me. Here is what I used:

<html>
  <head>
    <title>test</title>
    <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js"></script>
  </head>
  <body>
    <form id="chatTickets" method="post" action="/admin/index.cfm/">
      <input id="ticketID1" type="radio" checked="checked" value="myvalue1" name="ticketID"/>
      <input id="ticketID2" type="radio" checked="checked" value="myvalue2" name="ticketID"/>
    </form>
    <a href="#" title="Load ActiveChat" id="loadActive">Load Active</a>

    <script>
      jQuery("#loadActive").click(function() {
        //I have other code in here that runs before this function call
        writeData();
      });
      function writeData() {
        jQuery("input[name='ticketID']").each(function(i) {
            jQuery(this).attr('disabled', 'disabled');
        });
      }
    </script>
  </body>
</html>

I tested in FF3.5, moving to IE8 now. And it works fine in IE8 too. What browser are you using?

Usually when a method accepts a file, there's another method nearby that accepts a stream. If this isn't the case, the API is badly coded. Otherwise, you can use temporary files, where permission is usually granted in many cases. If it's applet, you can request write permission.

An example:

try {
    // Create temp file.
    File temp = File.createTempFile("pattern", ".suffix");

    // Delete temp file when program exits.
    temp.deleteOnExit();

    // Write to temp file
    BufferedWriter out = new BufferedWriter(new FileWriter(temp));
    out.write("aString");
    out.close();
} catch (IOException e) {
}

ExecutorService is newer and more general. A timer is just a thread that periodically runs stuff you have scheduled for it.

An ExecutorService may be a thread pool, or even spread out across other systems in a cluster and do things like one-off batch execution, etc...

Just look at what each offers to decide.

You need to put the files into an array in order to sort and find the last modified file.

$files = array();
if ($handle = opendir('.')) {
    while (false !== ($file = readdir($handle))) {
        if ($file != "." && $file != "..") {
           $files[filemtime($file)] = $file;
        }
    }
    closedir($handle);

    // sort
    ksort($files);
    // find the last modification
    $reallyLastModified = end($files);

    foreach($files as $file) {
        $lastModified = date('F d Y, H:i:s',filemtime($file));
        if(strlen($file)-strpos($file,".swf")== 4){
           if ($file == $reallyLastModified) {
             // do stuff for the real last modified file
           }
           echo "<tr><td><input type=\"checkbox\" name=\"box[]\"></td><td><a href=\"$file\" target=\"_blank\">$file</a></td><td>$lastModified</td></tr>";
        }
    }
}

Not tested, but that's how to do it.

This page provides great understanding about the constructor and destructor attribute implementation and the sections within within ELF that allow them to work. After digesting the information provided here, I compiled a bit of additional information and (borrowing the section example from Michael Ambrus above) created an example to illustrate the concepts and help my learning. Those results are provided below along with the example source.

As explained in this thread, the constructor and destructor attributes create entries in the .ctors and .dtors section of the object file. You can place references to functions in either section in one of three ways. (1) using either the section attribute; (2) constructor and destructor attributes or (3) with an inline-assembly call (as referenced the link in Ambrus' answer).

The use of constructor and destructor attributes allow you to additionally assign a priority to the constructor/destructor to control its order of execution before main() is called or after it returns. The lower the priority value given, the higher the execution priority (lower priorities execute before higher priorities before main() -- and subsequent to higher priorities after main() ). The priority values you give must be greater than100 as the compiler reserves priority values between 0-100 for implementation. Aconstructor or destructor specified with priority executes before a constructor or destructor specified without priority.

With the 'section' attribute or with inline-assembly, you can also place function references in the .init and .fini ELF code section that will execute before any constructor and after any destructor, respectively. Any functions called by the function reference placed in the .init section, will execute before the function reference itself (as usual).

I have tried to illustrate each of those in the example below:

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

/*  test function utilizing attribute 'section' ".ctors"/".dtors"
    to create constuctors/destructors without assigned priority.
    (provided by Michael Ambrus in earlier answer)
*/

#define SECTION( S ) __attribute__ ((section ( S )))

void test (void) {
printf("\n\ttest() utilizing -- (.section .ctors/.dtors) w/o priority\n");
}

void (*funcptr1)(void) SECTION(".ctors") =test;
void (*funcptr2)(void) SECTION(".ctors") =test;
void (*funcptr3)(void) SECTION(".dtors") =test;

/*  functions constructX, destructX use attributes 'constructor' and
    'destructor' to create prioritized entries in the .ctors, .dtors
    ELF sections, respectively.

    NOTE: priorities 0-100 are reserved
*/
void construct1 () __attribute__ ((constructor (101)));
void construct2 () __attribute__ ((constructor (102)));
void destruct1 () __attribute__ ((destructor (101)));
void destruct2 () __attribute__ ((destructor (102)));

/*  init_some_function() - called by elf_init()
*/
int init_some_function () {
    printf ("\n  init_some_function() called by elf_init()\n");
    return 1;
}

/*  elf_init uses inline-assembly to place itself in the ELF .init section.
*/
int elf_init (void)
{
    __asm__ (".section .init \n call elf_init \n .section .text\n");

    if(!init_some_function ())
    {
        exit (1);
    }

    printf ("\n    elf_init() -- (.section .init)\n");

    return 1;
}

/*
    function definitions for constructX and destructX
*/
void construct1 () {
    printf ("\n      construct1() constructor -- (.section .ctors) priority 101\n");
}

void construct2 () {
    printf ("\n      construct2() constructor -- (.section .ctors) priority 102\n");
}

void destruct1 () {
    printf ("\n      destruct1() destructor -- (.section .dtors) priority 101\n\n");
}

void destruct2 () {
    printf ("\n      destruct2() destructor -- (.section .dtors) priority 102\n");
}

/* main makes no function call to any of the functions declared above
*/
int
main (int argc, char *argv[]) {

    printf ("\n\t  [ main body of program ]\n");

    return 0;
}

output:

init_some_function() called by elf_init()

    elf_init() -- (.section .init)

    construct1() constructor -- (.section .ctors) priority 101

    construct2() constructor -- (.section .ctors) priority 102

        test() utilizing -- (.section .ctors/.dtors) w/o priority

        test() utilizing -- (.section .ctors/.dtors) w/o priority

        [ main body of program ]

        test() utilizing -- (.section .ctors/.dtors) w/o priority

    destruct2() destructor -- (.section .dtors) priority 102

    destruct1() destructor -- (.section .dtors) priority 101

The example helped cement the constructor/destructor behavior, hopefully it will be useful to others as well.

In VBA we can not use if jj = 5 or 6 then we must use if jj = 5 or jj = 6 then

maybe this:

If inputWks.Range("d9") > 0 And (inputWks.Range("d11") = "Restricted_Expenditure" Or inputWks.Range("d11") = "Unrestricted_Expenditure") Then

You need to quote that values.
Here is a more detailed spec.

I have an answer for you Yes, It is possible.

Go to

SQL Server Management Studio > select Database > click on attach

Then select and add .mdf and .ldf file. Click on OK.

When you must return specified type:

Task.FromResult<MyClass>(null);

I had same problem and beside some values inside my table. Although I changed my Primary Key with

ALTER TABLEuser_customer_permissionDROP PRIMARY KEY , ADD PRIMARY KEY (id)

problem continued on my server. I created new field inside the table I transfered the values into new field and deleted old one, problem solved!!

If you just want to run some code when an element becomes visible in the viewport:

function onVisible(element, callback) {
  new IntersectionObserver((entries, observer) => {
    entries.forEach(entry => {
      if(entry.intersectionRatio > 0) {
        callback(element);
        observer.disconnect();
      }
    });
  }).observe(element);
}

When the element has become visible the intersection observer calls callback and then destroys itself with .disconnect().

Use it like this:

onVisible(document.querySelector("#myElement"), () => console.log("it's visible"));

ctrl + c OR ctrl + Pause/Break

Both will ask for Terminate batch job, then press Y or y and click enter.

Although similar in general cases ("run and get results for many tasks"), each function has some specific functionality for other cases:

asyncio.gather()

Returns a Future instance, allowing high level grouping of tasks:

import asyncio
from pprint import pprint

import random


async def coro(tag):
    print(">", tag)
    await asyncio.sleep(random.uniform(1, 3))
    print("<", tag)
    return tag


loop = asyncio.get_event_loop()

group1 = asyncio.gather(*[coro("group 1.{}".format(i)) for i in range(1, 6)])
group2 = asyncio.gather(*[coro("group 2.{}".format(i)) for i in range(1, 4)])
group3 = asyncio.gather(*[coro("group 3.{}".format(i)) for i in range(1, 10)])

all_groups = asyncio.gather(group1, group2, group3)

results = loop.run_until_complete(all_groups)

loop.close()

pprint(results)

All tasks in a group can be cancelled by calling group2.cancel() or even all_groups.cancel(). See also .gather(..., return_exceptions=True),

asyncio.wait()

Supports waiting to be stopped after the first task is done, or after a specified timeout, allowing lower level precision of operations:

import asyncio
import random


async def coro(tag):
    print(">", tag)
    await asyncio.sleep(random.uniform(0.5, 5))
    print("<", tag)
    return tag


loop = asyncio.get_event_loop()

tasks = [coro(i) for i in range(1, 11)]

print("Get first result:")
finished, unfinished = loop.run_until_complete(
    asyncio.wait(tasks, return_when=asyncio.FIRST_COMPLETED))

for task in finished:
    print(task.result())
print("unfinished:", len(unfinished))

print("Get more results in 2 seconds:")
finished2, unfinished2 = loop.run_until_complete(
    asyncio.wait(unfinished, timeout=2))

for task in finished2:
    print(task.result())
print("unfinished2:", len(unfinished2))

print("Get all other results:")
finished3, unfinished3 = loop.run_until_complete(asyncio.wait(unfinished2))

for task in finished3:
    print(task.result())

loop.close()

Your error is caused by these:

Dim oTable As Table, oRow As Row,

These types, Table and Row are not variable types native to Excel. You can resolve this in one of two ways:

1. Include a reference to the Microsoft Word object model. Do this from Tools | References, then add reference to MS Word. While not strictly necessary, you may like to fully qualify the objects like Dim oTable as Word.Table, oRow as Word.Row. This is called early-binding.
2. Alternatively, to use late-binding method, you must declare the objects as generic Object type: Dim oTable as Object, oRow as Object. With this method, you do not need to add the reference to Word, but you also lose the intellisense assistance in the VBE.

I have not tested your code but I suspect ActiveDocument won't work in Excel with method #2, unless you properly scope it to an instance of a Word.Application object. I don't see that anywhere in the code you have provided. An example would be like:

Sub DeleteEmptyRows()
Dim wdApp as Object
Dim oTable As Object, As Object, _
TextInRow As Boolean, i As Long

Set wdApp = GetObject(,"Word.Application")

Application.ScreenUpdating = False

For Each oTable In wdApp.ActiveDocument.Tables

Try this:

select CONVERT(datetime, convert(varchar(10), 20120103))

There's a CodeProject article for an ID3 reader. And a thread at kixtart.org that has more information for other properties. Basically, you need to call the GetDetailsOf() method on the folder shell object for shell32.dll.

You can't use any parameterised constructor. You can use a parameterless constructor if you have a "where T : new()" constraint.

It's a pain, but such is life :(

This is one of the things I'd like to address with "static interfaces". You'd then be able to constrain T to include static methods, operators and constructors, and then call them.

There are many ways in which you can create unique keys, the simplest method is to use the index when iterating arrays.

Example

    var lists = this.state.lists.map(function(list, index) {
        return(
            <div key={index}>
                <div key={list.name} id={list.name}>
                    <h2 key={"header"+list.name}>{list.name}</h2>
                    <ListForm update={lst.updateSaved} name={list.name}/>
                </div>
            </div>
        )
    });

Wherever you're lopping over data, here this.state.lists.map, you can pass second parameter function(list, index) to the callback as well and that will be its index value and it will be unique for all the items in the array.

And then you can use it like

<div key={index}>

You can do the same here as well

    var savedLists = this.state.savedLists.map(function(list, index) {
        var list_data = list.data;
        list_data.map(function(data, index) {
            return (
                <li key={index}>{data}</li>
            )
        });
        return(
            <div key={index}>
                <h2>{list.name}</h2>
                <ul>
                    {list_data}
                </ul>
            </div>
        )
    });

Edit

However, As pointed by the user Martin Dawson in the comment below, This is not always ideal.

So whats the solution then?

Many

• You can create a function to generate unique keys/ids/numbers/strings and use that
• You can make use of existing npm packages like uuid, uniqid, etc
• You can also generate random number like new Date().getTime(); and prefix it with something from the item you're iterating to guarantee its uniqueness
• Lastly, I recommend using the unique ID you get from the database, If you get it.

Example:

const generateKey = (pre) => {
    return `${ pre }_${ new Date().getTime() }`;
}

const savedLists = this.state.savedLists.map( list => {
    const list_data = list.data.map( data => <li key={ generateKey(data) }>{ data }</li> );
    return(
        <div key={ generateKey(list.name) }>
            <h2>{ list.name }</h2>
            <ul>
                { list_data }
            </ul>
        </div>
    )
});

empty and isset should do it.

if(!isset($_POST['submit'])) exit();

$vars = array('login', 'password','confirm', 'name', 'email', 'phone');
$verified = TRUE;
foreach($vars as $v) {
   if(!isset($_POST[$v]) || empty($_POST[$v])) {
      $verified = FALSE;
   }
}
if(!$verified) {
  //error here...
  exit();
}
//process here...

There is a jinja2 extension you can use just need pip install (https://github.com/hackebrot/jinja2-time)

Map.Entry interface come pretty close to c++ pair. Look at the concrete implementation, like AbstractMap.SimpleEntry and AbstractMap.SimpleImmutableEntry First item is getKey() and second is getValue().

You could use overridePendingTransition in startActivity instead of onCreate. At least, that works for me!

See a full example here. It's including an (reverse) animation onBackPressed, so while returning to the previous activity! In your specific example (fade-in and -out) that might be unnecessary though.

Just in case someone is looking for a React solution without having to download addition dependancies you could write:

<select onChange={this.changed(this)}>
   <option value="Apple">Apple</option>
   <option value="Android">Android</option>                
</select>

changed(){
  return e => {
    console.log(e.target.value)
  }
}

Make sure to bind the changed() function in the constructor like:

this.changed = this.changed.bind(this);

I'm not sure if this works for the OP's situation, but I found that running the following command in the interactive console was the most flexible solution for me:

\i 'path/to/file.sql'

Just make sure you're already connected to the correct database. This command executes all of the SQL commands in the specified file.