Tutorial by Examples: t

Iterating Over std::vector

You can iterate over a std::vector in several ways. For each of the following sections, v is defined as follows: std::vector<int> v; Iterating in the Forward Direction C++11 // Range based for for(const auto& value: v) { std::cout << value << "\n"; } /...

C++ • std::vector

Accessing Elements

There are two primary ways of accessing elements in a std::vector index-based access iterators Index-based access: This can be done either with the subscript operator [], or the member function at(). Both return a reference to the element at the respective position in the std::vector (unles...

C++ • std::vector

Using std::vector as a C array

There are several ways to use a std::vector as a C array (for example, for compatibility with C libraries). This is possible because the elements in a vector are stored contiguously. C++11 std::vector<int> v{ 1, 2, 3 }; int* p = v.data(); In contrast to solutions based on previous C++ st...

C++ • std::vector

Creating DOM elements

The jQuery function (usually aliased as $) can be used both to select elements and to create new elements. var myLink = $('<a href="http://stackexchange.com"></a>'); You can optionally pass a second argument with element attributes: var myLink = $('<a>', { 'href': 'h...

jQuery • DOM Manipulation

Manipulating element classes

Assuming the page includes an HTML element like: <p class="small-paragraph"> This is a small <a href="https://en.wikipedia.org/wiki/Paragraph">paragraph</a> with a <a class="trusted" href="http://stackexchange.com">link</a>...

jQuery • DOM Manipulation

Adding the jQuery UI script & basic usage

To get started with the jQuery UI library, you'll need to add the jQuery script, the jQuery UI script, and the jQuery UI stylesheet to your HTML. First, download jQuery UI; choose the features you need on the download page. Unzip your download, and put jquery-ui.css and jquery-ui.js (and jquery.js)...

jQuery UI Library • Getting started with jQuery UI Library

Selecting elements using CSS selectors

String html = "<!DOCTYPE html>" + "<html>" + "<head>" + "<title>Hello world!</title>" + "</head>" + "<body>" + ...

Jsoup • Selectors

Creating a UIButton

UIButtons can be initialized in a frame: Swift let button = UIButton(frame: CGRect(x: x, y: y, width: width, height: height) Objective C UIButton *button = [[UIButton alloc] initWithFrame:CGRectMake(x, y, width, height)]; A specific type of UIButton can be created like this: Swift let but...

iOS • UIButton

Set title

Swift button.setTitle(titleString, forState: controlState) Objective C [button setTitle:(NSString *) forState:(UIControlState)]; To set the default title to "Hello, World!" Swift button.setTitle("Hello, World!", forState: .normal) Objective C [button setTitle:@&quot...

iOS • UIButton

Set title color

//Swift button.setTitleColor(color, forControlState: controlState) //Objective-C [button setTitleColor:(nullable UIColor *) forState:(UIControlState)]; To set the title color to blue //Swift button.setTitleColor(.blue, for: .normal) //Objective-C [button setTitleColor:[UIColor blueColo...

iOS • UIButton

Horizontally aligning contents

Swift //Align contents to the left of the frame button.contentHorizontalAlignment = .left //Align contents to the right of the frame button.contentHorizontalAlignment = .right //Align contents to the center of the frame button.contentHorizontalAlignment = .center //Make contents fill th...

iOS • UIButton

Getting the title label

The underlying title label, if one exists, can be fetched using Swift var label: UILabel? = button.titleLabel Objective C UILabel *label = button.titleLabel; This can be used to set the font of the title label, for example Swift button.titleLabel?.font = UIFont.boldSystemFontOfSize(12) ...

iOS • UIButton

Using the `HTTP[S]_PROXY` env var

This page describes how to use the Meteor command-line tool (for example, when downloading packages, deploying your app, etc) behind a proxy server. Like a lot of other command-line software, the Meteor tool reads the proxy configuration from the HTTP_PROXY and HTTPS_PROXY environment variables (th...

meteor • Using Meteor with a Proxy Server

Nil Coalescing Operator

You can use the nil coalescing operator to unwrap a value if it is non-nil, otherwise provide a different value: func fallbackIfNil(str: String?) -> String { return str ?? "Fallback String" } print(fallbackIfNil("Hi")) // Prints "Hi" print(fallbackIfNil(nil)...

Swift Language • Optionals

Using PuTTY (Advanced)

If you don't want to add Unix commands to your PATH on Windows, you can download a standalone SSH client like PuTTY. Download PuTTY here, then follow the instructions below to get a build machine. Call meteor admin get-machine <os-architecture> --json Copy and save the private key from the...

meteor • Accessing Meteor build machines from Windows

Using Cygwin (Unix tools on Windows)

The easiest way to get up and running is to install Git for Windows from this download page, and select "Use Git and optional Unix tools from the Windows Command Prompt" as in the screenshot below. After this, meteor admin get-machine <os-architecture> will work exactly as it does...

meteor • Accessing Meteor build machines from Windows

Initialization

The datepicker is used to show an interactive date selector which is tied to a standard form input field. It makes selecting of date for input tasks very easy and also it is also highly configurable. Any input field can be bound with jquery-ui datepicker by the input field's selector (id,class etc....

jQuery UI Library • Datepicker

Getting the screen resolution

To get the physical size of the screen (including window chrome and menubar/launcher): var width = window.screen.width, height = window.screen.height;

JavaScript • Screen

Getting the “available” area of the screen

To get the “available” area of the screen (i.e. not including any bars on the edges of the screen, but including window chrome and other windows: var availableArea = { pos: { x: window.screen.availLeft, y: window.screen.availTop }, size: { width: window.scr...

JavaScript • Screen

Getting color information about the screen

To determine the color and pixel depths of the screen: var pixelDepth = window.screen.pixelDepth, colorDepth = window.screen.colorDepth;

JavaScript • Screen