Tutorial by Examples: re

When matching the path of a route, you can do it explicitly, matching only one path, like so: get "/hello" do return "Hello!" end You can also use a regular expression to match complex routes. Any route which matches the regular expression will run that code block. If m...

To print a test field (TestField) from a test feature class (TestFC) in a test file geodatabase (Test.gdb) located in a temporary folder (C:\Temp): with arcpy.da.SearchCursor(r"C:\Temp\Test.gdb\TestFC",["TestField"]) as cursor: for row in cursor: print row[0]

Foreach allows a less error-prone and better readable way to iterate collections. The attribute ref can be used if we want to directly modify the iterated element. void main() { import std.stdio : writeln; int[] arr = [1, 3, 4]; foreach (ref el; arr) { el *= 2; } ...

void main() { import std.stdio : writeln; int[] arr = [1, 3, 4, 5]; foreach (i, el; arr) { if (i == 0) continue; // continue with the next iteration arr[i] *= 2; if (i == 2) break; // stop the loop iteration } writel...

from django.db import models from django.contrib.auth.models import User from django.db.models.signals import post_save from django.dispatch import receiver class UserProfile(models.Model): user = models.OneToOneField(User, related_name='user') website = models.URLField(default='', ...

Emacs uses the terms point, mark, and region to provide more precision about the selected text and position of the cursor. By understanding these terms, it'll help you understand and use other operations and functions. The point is the place in a buffer where editing (i.e. insertion) is currently t...

/*add this code to your function.php file now your api will include transaction_id */ add_action( 'woocommerce_api_order_response', 'my_woocommerce_api_order', 10, 2); function my_woocommerce_api_order( $data ) { //you can do anything with the $data here lets add the transaction id ...

In this example, we'll create a simple echo server that will listen on the specified port, and being able to handle new connections: #include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <sys/socket.h> #include <sys/types.h> #include <arpa/inet.h&...

<ImageView android:id="@+id/imgExample" android:layout_width="wrap_content" android:layout_height="wrap_content" ... /> set a drawable as content of ImageView using XML attribute: android:src="@drawable/android2" set a drawable program...

If you want to show local notification immediately, you should call: Swift 3 UIApplication.shared.presentLocalNotificationNow(notification) Swift 2 UIApplication.sharedApplication().presentLocalNotificationNow(notification) Objective-C [[UIApplication sharedApplication] presentLocalNotific...

public class GestureActivity extends Activity implements GestureDetector.OnDoubleTapListener, GestureDetector.OnGestureListener { private GestureDetector mGestureDetector; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedIn...

you can custom class below one private final String PROTOCOL_CONTENT_TYPE = String.format("application/json; charset=%s", PROTOCOL_CHARSET); public BooleanRequest(int method, String url, String requestBody, Response.Listener<Boolean> listener, Response.ErrorListener errorList...

#Region directive can now be placed inside methods and can even span over methods, classes and modules. #Region "A Region Spanning A Class and Ending Inside Of A Method In A Module" Public Class FakeClass 'Nothing to see here, just a fake class. End Class Module Extensi...

Dynamic Arrays Adding and reducing variables on an array dynamically is a huge advantage for when the information you are treating does not have a set number of variables. Adding Values Dynamically You can simply resize the Array with the ReDim Statement, this will resize the array but to if you ...

In F# there are many options for creating data pipelines, for example: List, Seq and Array. What data pipeline is preferable from memory usage and performance perspective? In order to answer this we'll compare performance and memory usage using different pipelines. Data Pipeline In order to me...

Due to very specific way of actor instantiation, injecting dependencies into an actor instance is not trivial. In order to intervene in actor instantiation and allow Spring to inject dependencies one should implement a couple of akka extensions. First of those is an IndirectActorProducer: import ak...

Labeling the alternatives inside a rule starting with the # operator tells ANTLR to generate listener methods for each label corresponding to the alternative. By specifying a label for each alternative in the following rule: // Rule type : int #typeInt | short #typeShort | long ...

Specifying the -gui command line option when running an ANTLR grammar in the test rig will result in a window popping up with a visual representation of the parse tree. For example: Given the following grammar: JSON.g4 /** Taken from "The Definitive ANTLR 4 Reference" by Terence Parr */...

The presence of a tsconfig.json file indicates that the current directory is the root of a TypeScript enabled project. Initializing a TypeScript project, or better put tsconfig.json file, can be done through the following command: tsc --init As of TypeScript v2.3.0 and higher this will create t...

In Tcl, a control structure is basically just another command. This is one possible implementation of a do ... while / do ... until control structure. proc do {body keyword expression} { uplevel 1 $body switch $keyword { while {uplevel 1 [list while $expression $body]} u...