Tutorial by Examples: f

Overflow also happens during the operation. In the following example, x is an int, 1 is an int by default. Therefore addition is an int addition. And the result will be an int. And it will overflow. int x = int.MaxValue; //MaxValue is 2147483647 long y = x + 1; //...

If you are using multiple namespaces that may have same-name classes(such as System.Random and UnityEngine.Random), you can use an alias to specify that Random comes from one or the other without having to use the entire namespace in the call. For instance: using UnityEngine; using System; Ran...

file is no longer a builtin name in 3.x (open still works). Internal details of file I/O have been moved to the standard library io module, which is also the new home of StringIO: import io assert io.open is open # the builtin is an alias buffer = io.StringIO() buffer.write('hello, ') # returns...

import cv2 image_path= #put your image path here #use imread() function to read image data to variable img. img = cv2.imread(image_path) #display image data in a new window with title 'I am an image display window' cv2.imshow('I am an image display window',img) #wait until user hi...

The if statement is used to control the flow of the program. An if statement identifies which statement to run based on the value of a Boolean expression. For a single statement, the braces{} are optional but recommended. int a = 4; if(a % 2 == 0) { Console.WriteLine("a contains an...

The horizontally justified navigation (menu) bar has some number of items that should be justified. The first (left) item has no left margin within the container, the last (right) item has no right margin within the container. The distance between items is equal, independent on the individual item w...

The backface-visibility property relates to 3D transforms. With 3D transforms and the backface-visibility property, you're able to rotate an element such that the original front of an element no longer faces the screen. For example, this would flip an element away from the screen: JSFIDDLE <d...

C++11 The C++11 standards guarantees that the initialization of function scope objects are initialized in a synchronized manner. This can be used to implement a thread-safe singleton with lazy initialization. class Foo { public: static Foo& instance() { static Foo inst; ...

This is a simple application with primefaces, it is a login page: 1-Configuration of web.xml: <?xml version="1.0" encoding="UTF-8"?> <web-app version="3.1" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-...

Suppose you have complex code that creates and returns a list by starting with a blank list and repeatedly appending to it: def create(): result = [] # logic here... result.append(value) # possibly in several places # more logic... return result # possibly in several places...

First, Install gulp and gulp-concat plugin to your project localy npm install --save-dev gulp gulp-concat and add gulp-concat task to your gulpfile.js var gulp = require('gulp'); var concat = require('gulp-concat'); gulp.task('default', function() { }); gulp.task('css', function() { ...

First, Install gulp and gulp-minify to project directory locally npm install --save-dev gulp gulp-minify Then add following min-js task to your gulpfile.js var gulp = require('gulp'); var minify = require('gulp-minify'); gulp.task('min-js', function() { return gulp.src('lib/*.js') ...

An existing working copy can be quickly transformed to reflect the contents of a different branch in the same repository. For example, you might have a working copy of the trunk and now need to work on a development branch. Instead of checking out a completely new working copy (which can waste a l...

#include <vector> #include <string> #include "agent_util.hpp" //this file can be found in Java SE Development Kit 8u101 Demos and Samples //see http://download.oracle.com/otn-pub/java/jdk/8u101-b13-demos/jdk-8u101-windows-x64-demos.zip //jdk1.8.0_101.zip!\demo\jvmti\v...

/* Callback for JVMTI_EVENT_VM_INIT */ static void JNICALL vm_init(jvmtiEnv* jvmti, JNIEnv* env, jthread thread) { jint runtime_version; jvmti->GetVersionNumber(&runtime_version); stdout_message("JVMTI Version: %d\n", runtime_verision); } /* Agent_OnLoad() is ca...

With the RequireQualifiedAccess attribute, union cases must be referred to as MyUnion.MyCase instead of just MyCase. This prevents name collisions in the enclosing namespace or module: type [<RequireQualifiedAccess>] Requirements = None | Single | All // Uses the DU with qualified acc...

A full explanation of Access Modifiers in Java can be found here. But how do they interact with Inner classes? public, as usual, gives unrestricted access to any scope able to access the type. public class OuterClass { public class InnerClass { public int x = 5; } p...

This topic is intended for intermediate to advanced F# developers "What are Monads?" is a common question. This is easy to answer but like in Hitchhikers guide to galaxy we realize we don't understand the answer because we didn't know what we were asking after. Many believe the way to un...

To create a prefab, drag a game object from the scene hierarchy into the Assets folder or subfolder: The game object name turns blue, indicating it is connected to a prefab. Now this object is a prefab instance, just like an object instance of a class. A prefab can be deleted after instanti...

Note that many datatypes don't need to be quoted, since they evaluate to themselves. QUOTE is especially useful for symbols and lists, to prevent evaluation as Lisp forms. Example for other datatypes not needed to be quoted to prevent evaluation: strings, numbers, characters, CLOS objects, ... Her...