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Is there a difference between x++ and ++x in java?
...you javac this Y.java class:
public class Y {
public static void main(String []args) {
int y = 2;
y = y++;
}
}
and javap -c Y, you get the following jvm code (I have allowed me to comment the main method with the help of the Java Virtual Machine Specification):
public cla...
In Ruby on Rails, what's the difference between DateTime, Timestamp, Time and Date?
...ave DATE, DATETIME, TIME and TIMESTAMP column data types; just as you have CHAR, VARCHAR, FLOAT and INTEGER.
So, you ask, what's the difference? Well, some of them are self-explanatory. DATE only stores a date, TIME only stores a time of day, while DATETIME stores both.
The difference between DATE...
How to run `rails generate scaffold` when the model already exists?
...o generate a scaffold script.
it outputs:
rails g scaffold users fname:string lname:string bdate:date email:string encrypted_password:string
from your schema.rb our your renamed schema.rb. Check it
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Get last n lines of a file, similar to tail
... process on bytes as In text files (those opened without a "b" in the mode string), only seeks relative to the beginning of the file are allowed (the exception being seeking to the very file end with seek(0, 2)).:
eg: f = open('C:/.../../apache_logs.txt', 'rb')
def tail(f, lines=20):
total_l...
How does `is_base_of` work?
...blic:
void bar(int);
private:
void bar(double);
};
int main(int argc, char* argv[])
{
Foo foo;
double d = 0.3;
foo.bar(d); // Compiler error, cannot access private member function
}
The same applies here, the fact that B is a private base does not prevent the check from taking pla...
How to open standard Google Map application from my application?
...
You should create an Intent object with a geo-URI:
String uri = String.format(Locale.ENGLISH, "geo:%f,%f", latitude, longitude);
Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(uri));
context.startActivity(intent);
If you want to specify an address, you should use ...
How to convert a scala.List to a java.util.List?
...ist
val myList = List("a", "b", "c")
val myListAsJavaList = seqAsJavaList[String](myList)
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Is the practice of returning a C++ reference variable evil?
...itive. Ever tried to increment the count of a value stored in a HashMap<String,Integer> in Java? :P
– Mehrdad Afshari
Oct 20 '11 at 7:29
...
UIWebView open links in Safari
...uest navigationType:(UIWebViewNavigationType)navigationType {
static NSString *regexp = @"^(([a-zA-Z]|[a-zA-Z][a-zA-Z0-9-]*[a-zA-Z0-9])[.])+([A-Za-z]|[A-Za-z][A-Za-z0-9-]*[A-Za-z0-9])$";
NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", regexp];
if ([predicat...
How do I install ASP.NET MVC 5 in Visual Studio 2012?
...
I forgot to write back, but all that was required extra was the windows 8.1 sdk for .net 4.5.1, but the asp.net and web tools 2013.1 was included in update 4.
– pqsk
Dec 19 '13 at 19:14
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