Tutorial by Topics: opt

Optional is a container object which may or may not contain a non-null value. If a value is present, isPresent() will return true and get() will return the value. Additional methods that depend on the presence of the contained value are provided, such as orElse(), which returns a default value if v...

“ An optional value either contains a value or contains nil to indicate that a value is missing” Excerpt From: Apple Inc. “The Swift Programming Language (Swift 3.1 Edition).” iBooks. https://itun.es/us/k5SW7.l Basic optional use cases include: for a constant (let), use of an optional within a loo...

The Option<T> type is Rust's equivalent of nullable types, without all the issues that come with it. The majority of C-like languages allow any variable to be null if there is no data present, but the Option type is inspired by functional languages which favour 'optionals' (e.g. Ha...

DROP TABLE removes the table definition from the schema along with the rows, indexes, permissions, and triggers.

class Some[+T](value: T) extends Option[T] object None extends Option[Nothing] Option[T](value: T) Constructor to create either a Some(value) or None as appropriate for the value provided.

only return call() either implicitly such as in arrow function or explicitly, can be a tail call statment function foo(){ return bar(); } // the call to bar is a tail call function foo(){ bar(); }// bar is not a tail call. The function returns undefined when no return is given const foo = ()...

:set [no](option|shortcut) :set (option|shortcut)=value :set (option|shortcut)(?|&) do not use : in the vimrc file See vimcast 1 video See vimcast 1 transcript

The x86 family has been around for a long time, and as such there are many tricks and techniques that have been discovered and developed that are public knowledge - or maybe not so public. Most of these tricks take advantage of the fact that many instructions effectively do the same thing - but dif...

ParameterDetailXmsInitial memory allocateXmxMax memory allocate

If possible, disable scripts on objects when they are not needed. For example if you have a script on an enemy object that searchers for and fires at the player consider disabling this script when the enemy is too far for example from the player.

getopts optstring name [args] ParameterDetailoptstringThe option characters to be recognizednameThen name where parsed option is stored Options optstring : The option characters to be recognized If a character is followed by a colon, the option is expected to have an argument, whi...