Tutorial by Examples: g

[root@localhost ~]# docker run -it --volumes-from vol3 8251da35e7a7 /bin/bash root@ef2f5cc545be:/# ls bin boot data dev etc home lib lib64 media mnt opt proc root run sbin srv sys tmp usr var root@ef2f5cc545be:/# ls /data abc1 abc10 abc2 abc3 abc4 abc5 abc6 abc7...

// Website you wish to allow to connect to response.setHeader('Access-Control-Allow-Origin', '*'); // Request methods you wish to allow response.setHeader('Access-Control-Allow-Methods', 'GET, POST, OPTIONS, PUT, PATCH, DELETE'); // Request headers you wish to allow response.setHeader('Acce...

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...

As per Wiki : In software engineering, the singleton pattern is a design pattern that restricts the instantiation of a class to one object. This is required to create exactly one object to coordinate actions across the system. class Singleton { // Private constructor so it can not be arbitra...

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 ...

These classes increase the left margin of a column by * columns. For example, .col-md-offset-4 moves .col-md-4 over four columns. <div class="row"> <div class="col-lg-4"></div> <div class="col-lg-4 col-lg-offset-4"></div> </div&g...

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 ...

If you want to detect when your user enters a specific location, you can create a fence for the specific location with a radius you want and be notified when your user enters or leaves the location. // Your own action filter, like the ones used in the Manifest private static final String FENCE_REC...

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, ...

If more than 12 columns are placed within a single row, each group of extra columns will, as one unit, wrap onto a new line. <div class="row"> <div class="col-xs-9">.col-xs-9</div> <div class="col-xs-4">.col-xs-4<br>Since 9 + 4 = 13 ...

Move columns to the right using .col-md-offset-* classes. These classes increase the left margin of a column by * columns. For example, .col-md-offset-4 moves .col-md-4 over four columns. <div class="row"> <div class="col-md-4">.col-md-4</div> <div cla...

To nest your content with the default grid, add a new .row and set of .col-sm-* columns within an existing .col-sm-* column. Nested rows should include a set of columns that add up to 12 or fewer (it is not required that you use all 12 available columns). <div class="row"> <di...

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-...

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...

In the body of a function nargin and nargout indicate respectively the actual number of input and output supplied in the call. We can for example control the execution of a function based on the number of provided input. myVector.m: function [res] = myVector(a, b, c) % Roughly emulates the c...

The following is a simple example Perl test script, that gives some structure to allow for testing of other methods in the class/package under test. The script produces standard output with simple "ok" / "not ok" text, which is called TAP (Test Anything Protocol). Typically the...

If you'd like to start implementing best practices, for yourself or your team, then Perl::Critic is the best place to start. The module is based on the Perl Best Practices book by Damien Conway and does a fairly good job implementing the suggestions made therein. Note: I should mention (and Conwa...

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");

Time::Piece is available in perl 5 after version 10 use Time::Piece; my $date = localtime->strftime('%m/%d/%Y'); print $date; Output 07/26/2016