Tutorial by Examples: ga

Using a regular expression, parse a record name that might be hierarchical. The expression looks for the final colon in the name. It returns what follows the colon, or the entire name if none: regexp_substr( {name} , '[^:]*$' )

'<div style="font-size:11pt">' || expression || '</div>'

JavaScript allows us to define getters and setters in the object literal syntax. Here's an example: var date = { year: '2017', month: '02', day: '27', get date() { // Get the date in YYYY-MM-DD format return `${this.year}-${this.month}-${this.day}` }, ...

var setValue; var obj = {}; Object.defineProperty(obj, "objProperty", { get: function(){ return "a value"; }, set: function(value){ setValue = value; } });

<?php namespace App; use Illuminate\Database\Eloquent\Model; class User extends Model { /** * Get the user's first name. * * @param string $value * @return string */ public function getFirstNameAttribute($value) { return ucfirst($v...

my @letters = ( 'a' .. 'z' ); # English ascii-bet print $letters[ rand @letters ] for 1 .. 5; # prints 5 letters at random How it works rand EXPR expects a scalar value, so @letters is evaluated in scalar context An array in scalar context returns the number of elements it ...

In order to create a workspace, one should run the following in the terminal: $ mkdir -p ~/workspace_name/src $ cd ~/workspace_name/src $ catkin_init_workspace $ cd ~/workspace_name/ $ catkin_make The previous commands creates a workspace named workspace_name. Once a workspace has been creat...

Assuming a workspace named workspace_name has been previously created in the home directory, a package named package_name can be created by executing the following command lines. $ cd ~/workspace_name/src/ $ catkin_create_pkg package_name rospy

Declaring the splat is useful for reusing sets of parameters multiple times or with slight variations: $splat = @{ Class = "Win32_SystemEnclosure" Property = "Manufacturer" ErrorAction = "Stop" } Get-WmiObject -ComputerName $env:COMPUTERNAME @splat Get...

NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration]; AFURLSessionManager *manager = [[AFURLSessionManager alloc] initWithSessionConfiguration:configuration]; NSURL *URL = [NSURL URLWithString:@"http://example.com/upload"]; NSURLRequest *r...

NSMutableURLRequest *request = [[AFHTTPRequestSerializer serializer] multipartFormRequestWithMethod:@"POST" URLString:@"http://example.com/upload" parameters:nil constructingBodyWithBlock:^(id<AFMultipartFormData> formData) { [formData appendPartWithFileURL:[NSURL ...

CMAKE_MINIMUM_REQUIRED(VERSION 2.8.11) SET(PROJ_NAME "myproject") PROJECT(${PROJ_NAME}) # Configuration types SET(CMAKE_CONFIGURATION_TYPES "Debug;Release" CACHE STRING "Configs" FORCE) IF(DEFINED CMAKE_BUILD_TYPE AND CMAKE_VERSION VERSION_GREATER "2.8"...

class User extends Model { public function setPasswordAttribute($password) { $this->attributes['password'] = bcrypt($password); } ... } Above code does "bcrypting" each time password property is set. $user = $users->first(); $user->password ...

app\Exceptions\Handler.php public function render($request, Exception $exception) { if ($exception instanceof ModelNotFoundException) { abort(404); } return parent::render($request, $exception); } You can catch / handle any exception that is thrown in Laravel.

One example of machine learning algorithms is the Random Forest alogrithm (Breiman, L. (2001). Random Forests. Machine Learning 45(5), p. 5-32). This algorithm is implemented in R according to Breiman's original Fortran implementation in the randomForest package. Random Forest classifier objects ca...

So the main goal of this function is to : Be standalone because it needs to be written in the main VbScript file and cannot be in an included file (because it defines the include function) Provide enough information if something goes wrong (ie. the file that was being included, the error that oc...

To enable SSH create a file called ssh in the /boot directory of your SD card. Identify the drive letter associated with your SD card. Open a command prompt (press Win+R on your keyboard to open the Run window. Then, type cmd) Enter the following at the command prompt (replacing Drive...

Problem definition: An 8 puzzle is a simple game consisting of a 3 x 3 grid (containing 9 squares). One of the squares is empty. The object is to move to squares around into different positions and having the numbers displayed in the "goal state". Given an initial state of 8-puzzle...

There are some general Future trait implementations in the futures crate. One of them is implemented in futures::sync::oneshot module and is available through futures::oneshot function: extern crate futures; use std::thread; use futures::Future; fn expensive_computation() -> u32 { //...

func multiply2(item: Int)-> Int { return (item + 2) } let multiply2ToMe = multiply2 // passing the function directly to the function as param print(math.performOperation(inputArray: arrayToBeProcessed, operation: multiply2ToMe)) Output: [3, 5, 7, 9, 11, 13, 10, 8, 6, 4, 102] ...