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The nix crate provides an UNIX Rust API to handle signals, however it requires using unsafe rust so you should be careful. use nix::sys::signal; extern fn handle_sigint(_:i32) { // Be careful here... } fn main() { let sig_action = signal::SigAction::new(handle_sigint, ...

Unlike emails, JIDs were defined with Internationalization (i18n) in mind using the Preparation, Enforcement, and Comparison of Internationalized Strings (PRECIS) framework. PRECIS (defined in RFC 7564), is a framework for comparing strings safely in a variety of contexts. For instance, imagine you...

Adding a footer is not natively possible. Luckily, we can make use of jQuery and CSS to add a footer to the slides of an ioslides presentation rendered with knitr. First of all we have to include the jQuery plugin. This is done by the line <script src="https://ajax.googleapis.com/ajax/libs...

fizzbuzz = fn (0, 0, _) -> "FizzBuzz" (0, _, _) -> "Fizz" (_, 0, _) -> "Buzz" (_, _, x) -> x end my_function = fn(n) -> fizzbuzz.(rem(n, 3), rem(n, 5), n) end

Sometimes one has to work with pages that are not using jQuery while most developers are used to have jQuery handy. In such situations one can use Chrome Developer Tools console (F12) to manually add jQuery on a loaded page by running following: var j = document.createElement('script'); j.onload ...

Dim flags = BindingFlags.Static Or BindingFlags.Public Or BindingFlags.Instance Dim members = GetType(String).GetMembers(flags) For Each member In members Console.WriteLine($"{member.Name}, ({member.MemberType})") Next

ArrayList is one of the inbuilt data structures in Java. It is a dynamic array (where the size of the data structure not needed to be declared first) for storing elements (Objects). It extends AbstractList class and implements List interface. An ArrayList can contain duplicate elements where it mai...

Test classes are created as local classes in a special unit test include. This is the basic structure of a test class: CLASS lcl_test DEFINITION FOR TESTING DURATION SHORT RISK LEVEL HARMLESS. PRIVATE SECTION. DATA: mo_cut TYPE REF TO zcl_...

Repeat something n times: >>> import itertools >>> for i in itertools.repeat('over-and-over', 3): ... print(i) over-and-over over-and-over over-and-over

Python 3.x3.2 accumulate yields a cumulative sum (or product) of numbers. >>> import itertools as it >>> import operator >>> list(it.accumulate([1,2,3,4,5])) [1, 3, 6, 10, 15] >>> list(it.accumulate([1,2,3,4,5], func=operator.mul)) [1, 2, 6, 24, 120] ...

The Replace function in SQL is used to update the content of a string. The function call is REPLACE( ) for MySQL, Oracle, and SQL Server. The syntax of the Replace function is: REPLACE (str, find, repl) The following example replaces occurrences of South with Southern in Employees table: FirstN...

Iterate over JSONObject properties JSONObject obj = new JSONObject("{\"isMarried\":\"true\", \"name\":\"Nikita\", \"age\":\"30\"}"); Iterator<String> keys = obj.keys();//all keys: isMarried, name & age while (keys.has...

cycle is an infinite iterator. >>> import itertools as it >>> it.cycle('ABCD') A B C D A B C D A B C D ... Therefore, take care to give boundaries when using this to avoid an infinite loop. Example: >>> # Iterate over each element in cycle for a fixed range >&g...

When to use abstract classes: To implement the same or different behaviour among multiple related objects When to use interfaces: to implement a contract by multiple unrelated objects Abstract classes create "is a" relations while interfaces provide "has a" capability. This c...

Create Or Replace Function Generateguid Return Char Is V_Guid Char(40); Begin Select Substr(Sys_Guid(),1,8)||'-'||Substr(Sys_Guid(),9,4)||'-' ||Substr(Sys_Guid(),13,4)||'-'||Substr(Sys_Guid(),17,4)||'-' ||Substr(Sys_Guid(),21) Into V_Guid...

Search for all facts involving a pattern in an hypothesis or conclusion: Coq < Search (_ + O). plus_n_O: forall n : nat, n = n + 0 The _ character serves as a wildcard, it can be used multiple times: Coq < Search (S _ <= _). le_S_n: forall n m : nat, S n <= S m -> n <= m le...

Session Types are a way to tell the compiler about the protocol you want to use to communicate between threads - not protocol as in HTTP or FTP, but the pattern of information flow between threads. This is useful since the compiler will now stop you from accidentally breaking your protocol and causi...

Bridge pattern decouples abstraction from implementation so that both can vary independently. It has been achieved with composition rather than inheritance. Bridge UML diagram from wikipedia: You have four components in this pattern. Abstraction: It defines an interface RefinedAbstraction: It ...

SELECT SYSDATE(); This function returns the current date and time as a value in 'YYYY-MM-DD HH:MM:SS' or YYYYMMDDHHMMSS format, depending on whether the function is used in a string or numeric context. It returns the date and time in the current time zone. SELECT NOW(); This function is a...

The dimension attribute on an object specifies that that object is an array. There are, in Fortran 2008, five array natures:1 explicit shape assumed shape assumed size deferred shape implied shape Take the three rank-1 arrays2 integer a, b, c dimension(5) a ! Explicit shape (default ...