Unlike normal Rust references, raw pointers are allowed to take null values.
use std::ptr;
// Create a const NULL pointer
let null_ptr: *const u16 = ptr::null();
// Create a mutable NULL pointer
let mut_null_ptr: *mut u16 = ptr::null_mut();
Note: at is not installed by default on most of modern distributions.
To execute a job once at some other time than now, in this example 5pm, you can use
echo "somecommand &" | at 5pm
If you want to catch the output, you can do that in the usual way:
echo "somecommand > o...
The following documentation describes both MySQLi and PDO supported pagination solution.
Go to https://github.com/rajdeeppaul/Pagination and download pagination.php file into your project directory. Let's say your directory structure looks like this:
project directory
|
|--paginati...
There are quite a number situations where one has huge amounts of data and using which he has to classify an object in to one of several known classes. Consider the following situations:
Banking: When a bank receives a request from a customer for a bankcard, the bank has to decide whether to issue...
Uses C standard format codes.
from datetime import datetime
datetime_for_string = datetime(2016,10,1,0,0)
datetime_string_format = '%b %d %Y, %H:%M:%S'
datetime.strftime(datetime_for_string,datetime_string_format)
# Oct 01 2016, 00:00:00
malloc() often calls underlying operating system functions to obtain pages of memory. But there is nothing special about the function and it can be implemented in straight C by declaring a large static array and allocating from it (there is a slight difficulty in ensuring correct alignment, in pract...
Let's say we have 8 houses. We want to setup telephone lines between these houses. The edge between the houses represent the cost of setting line between two houses.
Our task is to set up lines in such a way that all the houses are connected and the cost of setting up the whole connection is mini...
FullCalendar can be downloaded from it's website: https://fullcalendar.io/download/
from NPM:
$ npm install fullcalendar
from Bower:
$ bower install fullcalendar
or CDNJS:
//cdnjs.cloudflare.com/ajax/libs/fullcalendar/3.0.1/fullcalendar.min.js
//cdnjs.cloudflare.com/ajax/libs/fullca...
After enabling and creating migrations there might be a need to initially fill or migrate data in your database. There are several possibilities but for simple migrations you can use the method 'Seed()' in the file Configuration created after calling enable-migrations.
The Seed() function retrieves...
When run with no arguments, this program starts a TCP socket server that listens for connections to 127.0.0.1 on port 5000. The server handles each connection in a separate thread.
When run with the -c argument, this program connects to the server, reads the client list, and prints it out. The clie...
Sometimes we want to use a where query on a a collection of records returned which is not ActiveRecord::Relation.Hence we get the above error as Where clause is know to ActiveRecord and not to Array.
There is a precise solution for this by using Joins.
EXAMPLE:-
Suppose i need to find all user ...
Consider the following Java classes:
class Foo {
private Bar bar;
public void foo() {
bar.baz();
}
}
As can be seen, the class Foo needs to call the method baz on an instance of another class Bar for its method foo to work successfully. Bar is said to be a dependency for Foo sin...
The same examples as shown above with XML configuration can be re-written with Java configuration as follows.
Constructor injection
@Configuration
class AppConfig {
@Bean
public Bar bar() { return new Bar(); }
@Bean
public Foo foo() { return new Foo(bar()); }
}
Property in...
Dependencies can be autowired when using the component scan feature of the Spring framework. For autowiring to work, the following XML configuration must be made:
<context:annotation-config/>
<context:component-scan base-package="[base package]"/>
where, base-package is th...
Constructor injection through Java configuration can also utilize autowiring, such as:
@Configuration
class AppConfig {
@Bean
public Bar bar() { return new Bar(); }
@Bean
public Foo foo(Bar bar) { return new Foo(bar); }
}
Objective-C
Import the following to your ViewController
#import <CoreImage/CoreImage.h>
#import <CoreImage/CoreImage.h>
#import <QuartzCore/QuartzCore.h>
Call the function
[self faceDetector];
Function definition:
-(void)faceDetector
{
// Load the picture for face...
