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Maximum number of characters using keystrokes A, Ctrl+A, Ctrl+C and Ctrl+V
...f knowing 0 keys can make us 0 A's. Then we iterate through for i up to n, doing two things: pressing A once and pressing select all + copy followed by paste j times (actually j-i-1 below; note the trick here: the contents are still in the clipboard, so we can paste it multiple times without copying...
Proper practice for subclassing UIView?
... drawRect , and layoutSubviews . (I'm thinking in terms of setup and teardown callbacks.) In my case, I'm setting up my frame and internal views in layoutSubviews , but I'm not seeing anything onscreen.
...
Xcode 5: Code signing entitlement errors
...de signing identity at the top level row of each, using the Combined view. Doing so still snapped it back to <Multiple values>. When I expanded both rows, however, I saw the "Any iOS SDK" subrows for each configuration all set to None, although the Debug/Release rows did list the proper profil...
Why are you not able to declare a class as static in Java?
...
Only nested classes can be static. By doing so you can use the nested class without having an instance of the outer class.
class OuterClass{
public static class StaticNestedClass{
}
public class InnerClass{
}
public InnerClass getAnInnerCla...
Implementing Comments and Likes in database
...ent it... and I wonder how Django ORM will handle to map it (or how I will do that by myself...but, that is the other problem ;) ) But, can you explain me, cause I think I do not understand it properly - what you have drawn for me (thanks!) is the third approach you mentioned?
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Pointer to pointer clarification
I was following this tutorial about how does a pointer to a pointer work.
16 Answers
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Is it possible to read the value of a annotation in java?
...etention(RetentionPolicy.RUNTIME)
@interface Column {
....
}
you can do something like this
for (Field f: MyClass.class.getFields()) {
Column column = f.getAnnotation(Column.class);
if (column != null)
System.out.println(column.columnName());
}
UPDATE : To get private fields us...
add column to mysql table if it does not exist
... just go for it. you just want to be sure that there are no statements you do NOT want to succeed if something previous has failed.
– David
Mar 29 '16 at 20:26
add a comment
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What is the difference between class and instance methods?
...setObject:forKey:] etc. You'll often see this notation in Cocoa responses, documentation, and in Xcode.
– Quinn Taylor
Jun 27 '09 at 23:29
149
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Best way to store password in database [closed]
...ng the representation of a password in the database is the proper thing to do. By representation I mean that you want to hash the password using a salt (which should be different for every user) and a secure 1-way algorithm and store that, throwing away the original password. Then, when you want to ...