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One can iterate over a list using ~{ and ~} directives. CL-USER> (format t "~{~a, ~}~%" '(1 2 3 4 5)) 1, 2, 3, 4, 5, ~^ can be used to escape if there are no more elements left. CL-USER> (format t "~{~a~^, ~}~%" '(1 2 3 4 5)) 1, 2, 3, 4, 5 A numeric argument can ...

Assumptions: An Oracle JDK has been installed. The JDK was installed to the default directory. Setup steps Open Windows Explorer. In the navigation pane on the left right click on This PC (or Computer for older Windows versions). There is a shorter way without using the explorer in...

Array iteration comes in two flavors, foreach and the classic for-loop: a=(1 2 3 4) # foreach loop for y in "${a[@]}"; do # act on $y echo "$y" done # classic for-loop for ((idx=0; idx < ${#a[@]}; ++idx)); do # act on ${a[$idx]} echo "${a[$idx]}&...

Syntax {condition-to-evaluate} ? {statement-executed-on-true} : {statement-executed-on-false} As shown in the syntax, the Conditional Operator (also known as the Ternary Operator1) uses the ? (question mark) and : (colon) characters to enable a conditional expression of two possible outcomes. It c...

To make express web application modular use router factories: Module: // greet.js const express = require('express'); module.exports = function(options = {}) { // Router factory const router = express.Router(); router.get('/greet', (req, res, next) => { res.end(options....

Selenium Grid Node configuration resides on the Node itself and holds the information about network configuration and Node capabilities. The configuration can be applied in various ways: Default Configuration JSON Configuration Command line Configuration JSON Configuration The node configur...

Create a receiver. This class will receive the intent and handle it how you wish. public class AlarmReceiver extends BroadcastReceiver { @Override public void onReceive(Context context, Intent intent) { // Handle intent int reqCode = intent.getExtras().getInt(&...

The data.table package introduces the function fread. While it is similar to read.table, fread is usually faster and more flexible, guessing the file's delimiter automatically. # get the file path of a CSV included in R's utils package csv_path <- system.file("misc", "exDIF.csv&q...

Background threads cannot modify the UI; almost all UIKit methods must be called on the main thread. From a subclass of NSObject (including any UIViewController or UIView): InvokeOnMainThread(() => { // Call UI methods here }); From a standard C# class: UIApplication.SharedApplicat...

# example data test_sentences <- c("The quick brown fox", "jumps over the lazy dog") Is there a match? grepl() is used to check whether a word or regular expression exists in a string or character vector. The function returns a TRUE/FALSE (or "Boolean") vecto...

Head over to CMake download page and get a binary for your operating system, e.g. Windows, Linux, or Mac OS X. On Windows double click the binary to install. On Linux run the binary from a terminal. On Linux, you can also install the packages from the distribution's package manager. On Ubuntu 16.0...

LibGDX has a fairly simple setup, with the help of a simple Java program. You can find the download here. When you startup the application, it will look something like this: Note: This screenshot have been taken on Linux and shows path that differs from a Windows installation. However, the form is...

This example assumes you have already installed Java and Gradle. Use the following project structure: src/ main/ java/ com/ example/ Application.java build.gradle build.gradle is your build script for Gradle build system with the following content: buildscri...

You should implement SFSafariViewControllerDelegate so that your class is notified when the user hits the Done button on the SafariViewController and you can dismiss it as well. First declare your class to implement the protocol. class MyClass: SFSafariViewControllerDelegate { } Implement th...

Considering the following dictionary: d = {"a": 1, "b": 2, "c": 3} To iterate through its keys, you can use: for key in d: print(key) Output: "a" "b" "c" This is equivalent to: for key in d.keys(): print(key) ...

if /hay/ =~ 'haystack' puts "There is hay in the word haystack" end Note: The order is significant. Though 'haystack' =~ /hay/ is in most cases an equivalent, side effects might differ: Strings captured from named capture groups are assigned to local variables only when Regexp#=~...

There are 16 fundamental data types, or classes, in MATLAB. Each of these classes is in the form of a matrix or array. With the exception of function handles, this matrix or array is a minimum of 0-by-0 in size and can grow to an n-dimensional array of any size. A function handle is always scalar (1...

matplot is useful for quickly plotting multiple sets of observations from the same object, particularly from a matrix, on the same graph. Here is an example of a matrix containing four sets of random draws, each with a different mean. xmat <- cbind(rnorm(100, -3), rnorm(100, -1), rnorm(100, 1),...

To join two or more path components together, firstly import os module of python and then use following: import os os.path.join('a', 'b', 'c') The advantage of using os.path is that it allows code to remain compatible over all operating systems, as this uses the separator appropriate for the pl...

Use os.path.abspath: >>> os.getcwd() '/Users/csaftoiu/tmp' >>> os.path.abspath('foo') '/Users/csaftoiu/tmp/foo' >>> os.path.abspath('../foo') '/Users/csaftoiu/foo' >>> os.path.abspath('/foo') '/foo'