static and class both associate a method with a class, rather than an instance of a class. The difference is that subclasses can override class methods; they cannot override static methods. class properties will theoretically function in the same way (subclasses can override them), but they’re not possible in Swift yet.
Functions behaves like cmdlets. That is, you don’t type dir(c:\temp). Functions likewise take parameters as space separated and like cmdlets, support positional, named and optional parameters e.g.: Greet Recardo 5 Greet -times 5 -name Ricardo PowerShell uses () to allow you to specify expressions like so: function Greet([string[]]$names, [int]$times=5) { foreach ($name in $names) { … Read more
To answer your question: Yes Fortran does preserve the value of internal variables through function and subroutine calls. Under certain conditions … If you declare an internal variable with the SAVE attribute it’s value is saved from one call to the next. This is, of course, useful in some cases. However, your question is a … Read more
You want to use generics here: fn find_min<‘a, I>(vals: I) -> Option<&’a u32> where I: Iterator<Item = &’a u32>, { vals.min() } Traits can be used in two ways: as bounds on type parameters and as trait objects. The book The Rust Programming Language has a chapter on traits and a chapter on trait objects … Read more
Yes, Fortran has procedure pointers, so you can in effect alias a function name. Here is a code example which assigns to the function pointer “f_ptr” one function or the other. Thereafter the program can use “f_ptr” and the selected function will be invoked. module ExampleFuncs implicit none contains function f1 (x) real :: f1 … Read more
Simple implementation using Binary Search with C++ double root(double n){ // Max and min are used to take into account numbers less than 1 double lo = min(1, n), hi = max(1, n), mid; // Update the bounds to be off the target by a factor of 10 while(100 * lo * lo < n) … Read more
Use ctags. Generate a tags file, and tell vim where it is using the :tags command. Then you can just jump to the function definition using Ctrl–] There are more tags tricks and tips in this question.
If you use a let in each line, each definition will make a new function named myLast, shadowing all the previous definitions. So what you end up with is equivalent to GHCi> let myLast (x:xs) = myLast xs alone. What you probably want is to make a haskell file, say MyLast.hs, containing module MyLast where … Read more
This can be done using dblink. I showed an example with one insert being committed you will need to add your while loop logic and commit every loop. You can http://www.postgresql.org/docs/9.3/static/contrib-dblink-connect.html CREATE OR REPLACE FUNCTION log_the_dancing(ip_dance_entry text) RETURNS INT AS $BODY$ DECLARE BEGIN PERFORM dblink_connect(‘dblink_trans’,’dbname=sandbox port=5433 user=postgres’); PERFORM dblink(‘dblink_trans’,’INSERT INTO dance_log(dance_entry) SELECT ‘ || ”” … Read more
This section discusses the specific statements from your sample functions. See the bottom section for background information. $n = 1 and $n++ are assignments and therefore do not produce output. $n is an expression whose value is output $null – ditto, but even though it is output, it doesn’t display by default ($n++) – due … Read more