default-value

Ideally I want to be able to write something like: function a( b ) { b.defaultVal( 1 ); return b; } The intention of this is that if b is any defined value, b will remain as that value; but if b is undefined, then b will be set to the value specified in the parameter of defaultVal() , in this case 1 . Is this even possible? Ive been toying about with something like this: String.prototype.defaultVal=function(valOnUndefined){ if(typeof this==='undefined'){ return valOnUndefined; }else{ return this; } }; But I'm not having any success applying this kind of logic to any variable, particularly

For a bit of background, we use Zend Framework 2 and Doctrine at work. Doctrine will always insert NULL for values we do not populate ourselves. Usually this is okay as if the field has a default value, then it SHOULD populate the field with this default value. For one of our servers running MySQL 5.6.16 a query such as the one below runs and executes fine. Although NULL is being inserted into a field which is not nullable, MySQL populates the field with its default value on insert. On another of our servers running MySQL 5.6.20 , we run the query below and it falls over because it complains

I am new to Java. I just read that class variables in Java have default value. I tried the following program and was expecting to get the output as 0 , which is the default value on an integer, but I get the NullPointerException . What am I missing? class Test{ static Integer iVar; public static void main(String...args) { System.out.println(iVar.intValue()); } } codaddict You are right, uninitialized class variables in Java have default value assigned to them. Integer type in Java are not same as int . Integer is the wrapper class which wraps the value of primitive type int in an object. In

I'm trying to change the default value of a foreignkey-formfield to set a Value of an other model depending on the logged in user . But I'm racking my brain on it... This: Changing ForeignKey’s defaults in admin site would an option to change the empty_label, but I need the default_value. #Now I tried the following without errors but it didn't had the desired effect: class EmployeeAdmin(admin.ModelAdmin): ... def formfield_for_foreignkey(self, db_field, request=None, **kwargs): formfields= super(EmployeeAdmin, self).formfield_for_foreignkey(db_field, request, **kwargs) if request.user.is