Tutorial by Examples: d

var http = require('http'); var fs = require('fs'); var path = require('path'); http.createServer(function (request, response) { console.log('request ', request.url); var filePath = '.' + request.url; if (filePath == './') filePath = './index.html'; var extname = String(path.extnam...

While each mobile platforms do offer their own settings management api, there are no built in ways to read settings from a good old .net style app.config xml file; This is due to a bunch of good reasons, notably the .net framework configuration management api being on the heavyweight side, and each...

Express passes a next callback to every route handler and middleware function that can be used to break logic for single routes across multiple handlers. Calling next() with no arguments tells express to continue to the next matching middleware or route handler. Calling next(err) with an error will ...

Sending email is pretty simple in Go. It helps to understand the RFC 822, which specifies the style an email need to be in, the code below sends a RFC 822 compliant email. package main import ( "fmt" "net/smtp" ) func main() { // user we are authorizing as ...

func bufferedUnbufferedExample(buffered bool) { // We'll declare the channel, and we'll make it buffered or // unbuffered depending on the parameter `buffered` passed // to this function. var ch chan int if buffered { ch = make(chan int, 3) } else { ch...

We use the following media queries in our Less files to create the key breakpoints in our grid system. /* Extra small devices (phones, less than 768px) */ /* No media query since this is the default in Bootstrap */ /* Small devices (tablets, 768px and up) */ @media (min-width: @screen-sm-min) ...

What is Bootstrap Grid System Bootstrap grid system provides the quick and easy way to create responsive website layouts. Bootstrap 3 includes predefined grid classes for quickly making grid layouts for different types of devices like cell phones, tablets, laptops and desktops, etc. For example, ...

Using a single set of .col-md-* grid classes, you can create a basic grid system that starts out stacked on mobile devices and tablet devices (the extra small to small range) before becoming horizontal on desktop (medium) devices. Place grid columns in any .row. <div class="row"> ...

Turn any fixed-width grid layout into a full-width layout by changing your outermost .container to .container-fluid. <div class="container-fluid"> <div class="row"> ... </div> </div>

Don't want your columns to simply stack in smaller devices? Use the extra small and medium device grid classes by adding .col-xs-* .col-md-* to your columns. See the example below for a better idea of how it all works. <!-- Stack the columns on mobile by making one full-width and the other half-...

Build on the previous example by creating even more dynamic and powerful layouts with tablet .col-sm-* classes. <div class="row"> <div class="col-xs-12 col-sm-6 col-md-8">.col-xs-12 .col-sm-6 .col-md-8</div> <div class="col-xs-6 col-md-4">...

Easily change the order of our built-in grid columns with .col-md-push-* and .col-md-pull-* modifier classes. <div class="row"> <div class="col-md-9 col-md-push-3">.col-md-9 .col-md-push-3</div> <div class="col-md-3 col-md-pull-9">.col-md-...

In addition to prebuilt grid classes for fast layouts, Bootstrap includes Less variables and mixins for quickly generating your own simple, semantic layouts. Variables Variables determine the number of columns, the gutter width, and the media query point at which to begin floating columns. We use ...

For libraries that specify autoload information, Composer generates a vendor/autoload.php file. You can simply include this file and you will get autoloading for free. require __DIR__ . '/vendor/autoload.php'; This makes it really easy to use third party code. For example: If your project depend...

Most of the time, loops are computationally expensive with Matlab. Your code will be orders of magnitudes faster if you use vectorization. It also often makes your code more modular, easily modifiable, and easier to debug. The major downside is that you have to take time to plan the data structures,...

Regex to match postcodes in UK The format is as follows, where A signifies a letter and 9 a digit: FormatCoverageExampleCellCellAA9A 9AAWC postcode area; EC1–EC4, NW1W, SE1P, SW1EC1A 1BBA9A 9AAE1W, N1C, N1PW1A 0AXA9 9AA, A99 9AAB, E, G, L, M, N, S, WM1 1AE, B33 8THAA9 9AA, AA99 9AAAll other postco...

You should make sure that module DBI has been installed on your pc, then follow the bellow steps: use DBI module in your perl script use DBI; Declare some primary parameters my $driver = "MyDriver"; my $database = "DB_name"; my $dsn = "DBI:$driver:dbname=$datab...

Install DateTime on your PC and then use it in perl script: use DateTime; Create new current datetime $dt = DateTime->now( time_zone => 'Asia/Ho_Chi_Minh'); Then you can access elements's values of date and time: $year = $dt->year; $month = $dt->month; $day = $dt->day; $...

Set single element: $dt->set( year => 2016 ); Set many elements: $dt->set( year => 2016, 'month' => 8); Add duration to datetime $dt->add( hour => 1, month => 2) Datetime subtraction: my $dt1 = DateTime->new( year => 2016, month => 8, ...

#!/usr/bin/perl use Term::ANSIColor; print color("cyan"), "Hello", color("red"), "\tWorld", color("green"), "\tIt's Me!\n", color("reset");