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let minimumVersionString = "3.1.3" let versionComparison = UIDevice.current.systemVersion.compare(minimumVersionString, options: .numeric) switch versionComparison { case .orderedSame, .orderedDescending: //current version is >= (3.1.3) break case .orderedA...

When initializing a Git repository for Unity development, there are a couple of things that need to be done. Unity Ignore Folders Not everything should be versioned in the repository. You can add the template below to your .gitignore file in the root of your repository. Or alternatively, you can c...

Int("123") // Returns 123 of Int type Int("abcd") // Returns nil Int("10") // Returns 10 of Int type Int("10", radix: 2) // Returns 2 of Int type Double("1.5") // Returns 1.5 of Double type Double("abcd") // Returns nil Note that do...

The extension 'realurl' provides complete transformation of URLs with GET parameter in the browser, like “index.php?id=123&type=0&L=1” into a virtual path, a so called “Speaking URL” like “home/about-us/index.html” and back again. The objective is that URLs shall be as human readable as poss...

To send an immediate message with data to JavaScript, you have to trigger an action from your init. init : ( Model, Cmd Msg ) init = ( Model 0, send SendOutgoing ) send : msg -> Cmd msg send msg = Task.perform identity identity (Task.succeed msg)

In this example we will calculate the squared deviance for each column in a data frame, in this case the mtcars. Option A: integer index squared_deviance <- vector("list", length(mtcars)) for (i in seq_along(mtcars)){ squared_deviance[[i]] <- (mtcars[[i]] - mean(mtcars[[i]]))^2...

To illustrate the effect of good for loop construction, we will calculate the mean of each column in four different ways: Using a poorly optimized for loop Using a well optimized for for loop Using an *apply family of functions Using the colMeans function Each of these options will be shown...

import { Component } from '@angular/core'; @Component({ selector: 'my-app', template: ` <h1>Angular 2 App</h1> <p>Component is directive with template</p> ` }) export class AppComponent { }

By default, ui-router encodes the slash / inside parameters. If you want to send a path in the URL, you need to define a custom parameter type. Define: module.config(['$urlMatcherFactoryProvider', function($urlMatcherFactory) { $urlMatcherFactory.type('path', { decode: function(val) { retu...

A complete Fortran program is made up from a number of distinct program units. Program units are: main program function or subroutine subprogram module or submodule block data program unit The main program and some procedure (function or subroutine) subprograms may be provided by a languag...

An external procedure is one which is defined outside another program unit, or by a means other than Fortran. The function contained in a file like integer function f() implicit none end function f is an external function. For external procedures, their existence may be declared by using a...

Block data program units are program units which provide initial values for objects in common blocks. These are deliberately left undocumented here, and will feature in the documentation of historic Fortran features.

A program unit which is not an internal subprogram may contain other program units, called internal subprograms. program prog implicit none contains function f() end function f subroutine g() end subroutine g end program Such an internal subprogram has a number of features: t...

The Observer pattern is used for event handling and delegation. A subject maintains a collection of observers. The subject then notifies these observers whenever an event occurs. If you've ever used addEventListener then you've utilized the Observer pattern. function Subject() { this.observers...

A distinctive syntactic peculiarity of C is that declarations mirror the use of the declared object as it would be in a normal expression. The following set of operators with identical precedence and associativity are reused in declarators, namely: the unary * "dereference" operator wh...

Using an incorrect format specifier in the first argument to printf invokes undefined behavior. For example, the code below invokes undefined behavior: long z = 'B'; printf("%c\n", z); Here is another example printf("%f\n",0); Above line of code is undefined behavior. %...

These examples assume that you already know what Java 7's NIO is in general, and you are used to writing code using java.io.File. Use these examples as a means to quickly find more NIO-centric documentation for migrating. There is much more to Java 7's NIO such as memory-mapped files or opening a Z...

mconcat :: [a] -> a is another method of the Monoid typeclass: ghci> mconcat [Sum 1, Sum 2, Sum 3] Sum {getSum = 6} ghci> mconcat ["concat", "enate"] "concatenate" Its default definition is mconcat = foldr mappend mempty.

By default, user input history in IEx do not persist across different sessions. erlang-history adds history support to both the Erlang shell and IEx: git clone [email protected]:ferd/erlang-history.git cd erlang-history sudo make install You can now access your previous inputs using the up and d...

Wikipedia currently defines a pure function as follows: The function always evaluates the same result value given the same argument value(s). The function result value cannot depend on any hidden information or state that may change while program execution proceeds or between different executions...