Tutorial by Examples: ch

A checkable input that has three possible values: true, false, or mixed. <p> <input type="checkbox" role="checkbox" aria-checked="false"> I agree to the terms </p>

A checkable menuitem that has three possible values: true, false, or mixed. <ul role="menu"> <li role="menuitem">Console</li> <li role="menuitem">Layout</li> <li role="menuitemcheckbox" aria-checked="true"&g...

A landmark region that contains a collection of items and objects that, as a whole, combine to create a search facility. <div role="search"> <input role="searchbox" type="text"> <button role="button">Search</button> </div>...

A type of textbox intended for specifying search criteria. <div role="search"> <input role="searchbox" type="text"> <button role="button">Search</button> </div>

A type of checkbox that represents on/off values, as opposed to checked/unchecked values. <select role="switch" aria-checked="false"> <option>On</option> <option selected>Off</option> </select>

In general, it is considered good practice to throw by value (rather than by pointer), but catch by (const) reference. try { // throw new std::runtime_error("Error!"); // Don't do this! // This creates an exception object // on the heap and would require you to catch the ...

Given a file sample: hello world ahello here hello_there A normal grep for "hello" returns: $ grep hello sample hello world ahello here hello_there Using -w allows to select those lines containing matches that form whole words: $ grep -w hello sample hello world

Suppose you have many changes in one or more files but from each file you only want to commit some of the changes, you can select the desired changes using: git add -p or git add -p [file] Each of your changes will be displayed individually, and for each change you will be prompted to choose...

Leaflet is an open-source JavaScript library for making dynamic maps for the web. RStudio wrote R bindings for Leaflet, available through its leaflet package, built with htmlwidgets. Leaflet maps integrate well with the RMarkdown and Shiny ecosystems. The interface is piped, using a leaflet() funct...

Switch statements use non-strict comparison to determine matches. This can lead to some nasty surprises. For example, consider the following statement: switch ($name) { case 'input 1': $mode = 'output_1'; break; case 'input 2': $mode = 'output_2'; bre...

To change MySQL's root user password: Step 1: Stop the MySQL server. in Ubuntu or Debian: sudo /etc/init.d/mysql stop in CentOS, Fedora or Red Hat Enterprise Linux: sudo /etc/init.d/mysqld stop Step 2: Start the MySQL server without the privilege system. sudo mysqld_safe --skip-grant-tab...

Using the Story Board: Select the tab bar item from the corresponding view controller and go to the attributes inspector If you want a built-in icon and title, set the 'System Item' to the corresponding value. For a custom icon, add the required images to the assets folder and set the 'System It...

The unchecked keyword prevents the compiler from checking for overflows/underflows. For example: const int ConstantMax = int.MaxValue; unchecked { int1 = 2147483647 + 10; } int1 = unchecked(ConstantMax + 10); Without the unchecked keyword, neither of the two addition operations will co...

Vim supports the use of regular expressions when searching through a file. The character to indicate that you wish to perform a search is /. The simplest search you can perform is the following /if This will search the entire file for all instances of if. However, our search if is actually a r...

Orders Table CustomerIdProductIdQuantityPrice12510013220014150021450356700 To check for customers who have ordered both - ProductID 2 and 3, HAVING can be used select customerId from orders where productID in (2,3) group by customerId having count(distinct productID) = 2 Return value:...

Following statement matches all records having FName that starts with a letter from A to F from Employees Table. SELECT * FROM Employees WHERE FName LIKE '[A-F]%'

The equivalent to git pull is the command git svn rebase This retrieves all the changes from the SVN repository and applies them on top of your local commits in your current branch. You can also use the command git svn fetch to retrieve the changes from the SVN repository and bring them to ...

The command git svn dcommit will create a SVN revision for each of your local git commits. As with SVN, your local git history must be in sync with the latest changes in the SVN repository, so if the command fails, try performing a git svn rebase first.

This simple CUDA program demonstrates how to write a function that will execute on the GPU (aka "device"). The CPU, or "host", creates CUDA threads by calling special functions called "kernels". CUDA programs are C++ programs with additional syntax. To see how it works...

Highchart by default puts a credits label in the lower right corner of the chart. This can be removed using credits option in your chart settings. credits: { enabled: false } Or credits: false will remove the highcharts.com logo.