It’s not completely clear what you are looking for, but note that java long arithmetic is effectively done mod 264. You can investigate modular inverses and the extended euclidean algorithm yourself, as well as how java handles integer overflow. The BigInteger class makes doing these experiments relatively easily, as this example shows. public class Main … Read more
It is not legal properties file. But it is legal HOCON conf. An example of your conf file reading with hocon generated by tscfg. import com.typesafe.config.Config; import com.typesafe.config.ConfigFactory; import org.junit.Assert; import java.io.File; public class SampleConf { public final SampleConf.Address Address; public final SampleConf.Person Person; public static class Address { public final int Pin; public Address(final … Read more
Your bufferX and bufferY variables are not declared as class members but rather as variables in the asd() function/constructor and they are deleted when that function exits. You should declare them as class members if you want to retain them. Also, please do not post code as images, it makes it harder to help you. … Read more
map.keySet().stream().map(Object::toString).collect(toCollection(LinkedHashSet::new)); solved Keyset to Set of string [closed]
static int n = 0; is one time initialization Like the snippet below, bool initialized = false; static int n; int fun1(int x){ if(!initialized){ n = 0; initialized = true; } if(x > 0){ n++; return fun1(x-1)+n; } return 0; } static int n; n =0 is reset to zero on every recursive call. Like … Read more
Here is an explanation: int *p; //declares a pointer to an integer int x; //declares an integer called x int k; //declares an integer called k //at this point all values are uninitialized and could contain anything x = 30; //the numerical value 30 is assigned to x k = x; //the contents of x(30) … Read more
There’s no reason to do a computation that has the same result multiple times, especially if it involves memory allocations. You’re correct in that your first snippet has worse time and memory performance. Every call to split will iterate over the string (probably the fastest part of all that), allocate two new arrays and copy … Read more
Try This Don’t need to use JSON simply try this code to get response from server NSString *string= [[NSString alloc]initWithFormat:@”url”]; NSLog(@”%@”,string); NSURL *url = [NSURL URLWithString:string]; NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url]; [request setHTTPMethod:@”POST”]; NSURLResponse *response; NSError *err; NSData *responseData = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&err]; NSLog(@”responseData: %@”, responseData); NSString *str = [[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding]; NSLog(@”responseData: … Read more
Because it is a recursive function. Let’s say you call it with n=3… For the first case you would get: printSeriesInReverse(3) 3 > 0 // YES prints 3 printSeriesInReverse(2) 2 > 0 // YES prints 2 printSeriesInReverse(1) 1 > 0 // YES prints 1 printSeriesInReverse(0) 0 > 0 // NO // End of recursion Final … Read more
Simply comment out the line specifying validators for the email attribute, or remove it altogether: # app/models/user.rb # validates :email, :presence => false, :email => false You’ll also need to make a slight modification to your users table. By default, Devise does not allow the email field to be null. Create and run change a … Read more
you can use this : <?php $update = “”; foreach($_POST as $key => $value) { if(!empty($value)) { $update .= $key. “='”.$value.”‘,”; } } $update = substr($update,0,-1); $query = “UPDATE table_name SET “.$update.” WHERE id=$id”; ?> solved PHP: Create SQL query for available $_POST variable [closed]
I think the reason is pretty clear. ints.forEach((i) -> { System.out.print(ints.get(i-1) + ” “); }); Translates approximately to: for (Integer i : ints) { System.out.println(ints.get(i – 1) + ” “); } Which will cause IndexOutOfBoundsExceptions because i refers to the elements of each list, and each of those elements – 1 will give an index … Read more
<> Is used in C# generics to declare generic types. Ex. for a list. List<int> would create a list of ints. To explain it further you could have a type like this: public class MyGenericType<T> { public T MyGenericProperty { get; set; } } In which case you could do something like this: var myGenericIntType … Read more
Before I answer you question, note that a void method can’t return an ArrayList. And to the question: They differ in the lock they acquire. In this case, the first one is an implicit lock on “this”. It’s a way to write public void getPlayers() { synchronized (this) { return list; } } Except that … Read more
BODMAS rule is used to evaluate the expression . d*b = 18 “+” and “-” have same precedence . But “-” comes first in the left. SO 100 – 18 = 82 And then 82 + 8 = 90. solved Precedence of basic mathematical operators