Tutorial by Examples: re

Will provide the total number of records processed in the current awk instance. cat > file1 suicidesquad harley quinn joker deadshot cat > file2 avengers ironman captainamerica hulk awk '{print NR}' file1 file2 1 2 3 4 5 6 7 8 A total on 8 records were processed in th...

Provides the total number of records processed by the awk instance relative to the files awk is processing cat > file1 suicidesquad harley quinn joker deadshot cat > file2 avengers ironman captainamerica hulk awk '{print FNR}' file1 file2 1 2 3 4 1 2 3 4 Each file had...

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A classic use of here documents is to create a file by typing its content: cat > fruits.txt << EOF apple orange lemon EOF The here-document is the lines between the << EOF and EOF. This here document becomes the input of the cat command. The cat command simply outputs its in...

If you need to add custom headers to your volley requests, you can't do this after initialisation, as the headers are saved in a private variable. Instead, you need to override the getHeaders() method of Request.class as such: new JsonObjectRequest(REQUEST_METHOD, REQUEST_URL, REQUEST_BODY, RESP_L...

Due to not being Excel-VBA exclusive contents this Example has been moved to VBA documentation. Link: Dynamic Arrays (Array Resizing and Dynamic Handling)

Configure your app's URLconf to automatically use a URL namespace by setting the app_name attribute: # In <myapp>/urls.py from django.conf.urls import url from .views import overview app_name = 'myapp' urlpatterns = [ url(r'^$', overview, name='overview'), ] This will set t...

Setup First, install the necessary packages with: npm install express cors mongoose Code Then, add dependencies to server.js, create the database schema and the name of the collection, create an Express.js server, and connect to MongoDB: var express = require('express'); var cors = require('...

You can create temporary files which has a visible name on the file system which can be accessed via the name property. The file can, on unix systems, be configured to delete on closure (set by delete param, default is True) or can be reopened later. The following will create and open a named temp...

As we know we can declare an array with default values: int[] arr = new int[10]; This will create an array of 10 integers with each element of the array having value 0 (the default value of type int). To create an array initialized with a non-default value, we can use Enumerable.Repeat from the...

The following example uses Express to create an HTTP server listening on port 3000, which responds with "Hello, World!". Express is a commonly-used web framework that is useful for creating HTTP APIs. First, create a new folder, e.g. myApp. Go into myApp and make a new JavaScript file con...

<svg width="800px" height="600px"> <defs> <filter id="complex-shadow" color-interpolation-filters="sRGB" x="-50%" y="-50%" height="200%" width="200%"> <!-- Take source alpha, offset it by angle/...

<svg width="800px" height="600px"> <defs> <filter id="greyscale"> <feColorMatrix type="matrix" values="0.2126 0.7152 0.0722 0 0 0.2126 0.7152 0.0722 0 0 0...

<svg width="800px" height="600px"> <defs> <filter id="greyscale"> <feColorMatrix type="matrix" values="0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 ...

Since Java 7 it has been possible to use one or more underscores (_) for separating groups of digits in a primitive number literal to improve their readability. For instance, these two declarations are equivalent: Java SE 7 int i1 = 123456; int i2 = 123_456; System.out.println(i1 == i2); // tru...

To produce nested JSON object, you need to simply add one JSON object to another: JSONObject mainObject = new JSONObject(); // Host object JSONObject requestObject = new JSONObject(); // Included object try { requestObject.put("lastname", lastname); reques...

Create a node CREATE (neo:Company) //create node with label 'Company' CREATE (neo:Company {name: 'Neo4j', hq: 'San Mateo'}) //create node with properties Create a relationship CREATE (beginning_node)-[:edge_name{Attribute:1, Attribute:'two'}]->(ending_node) Query Templates Running neo...

CREATE (beginning_node)-[:edge_name{Attribute:1, Attribute:'two'}]->(ending_node)

A common problem when working with Unity is when 2 or more developers are modifying a Unity scene or prefab (*.unity files). Git does not know how to merge them correctly out of the box. Thankfully the Unity team deployed a tool called SmartMerge which makes simple merge automatic. The first thing...

As a root user run: nginx -s reopen