Tutorial by Examples: en

Rename a file or directory. Status is in OS-ERROR. Can also be used to move files (or move and rename). OS-RENAME oldname newname Rename /tmp/old-name to /tmp/new-name: OS-RENAME VALUE("/tmp/old-name") VALUE("/tmp/new-name"). Move file c:\temp\old.txt to c:\new-dir\old....

Client metrics cover the traffic between the client and the Varnish cache. sess_conn - Cumulative number of connections. client_req - Cumulative number of client requests. sess_dropped - Dropped connections because of a full queue. Monitor sess_conn and client_req to keep track of traffic vo...

There are a number of metrics describing the communication between Varnish and it's backends. The most important metrics here might be these: backend_busy - Number of http 5xx statuses recieved by a backend. With VCL you can configure Varnish to try another backend if this happens. backend_fail...

{-# LANGUAGE OverloadedStrings #-} module Main where import Data.Aeson main :: IO () main = do let example = Data.Aeson.object [ "key" .= (5 :: Integer), "somethingElse" .= (2 :: Integer) ] :: Value print . encode $ example

<?php $ch = curl_init(); curl_setopt($ch, CURLOPT_URL, "https://api.dropboxapi.com/2/files/list_folder"); curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); curl_setopt($ch, CURLOPT_CAINFO, "cacert.pem"); curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0); curl_setopt($ch, CURLOP...

Now that you have the providers for your different models, you need to request them. Just as Vehicle needs Motor, you have to add the @Inject annotation in the Vehicle constructor as follows: @Inject public Vehicle(Motor motor){ this.motor = motor; } You can use the @Inject annotation to ...

Now that you have every connection ready, you have to obtain an instance of this interface and invoke its methods to obtain the object you need: VehicleComponent component = Dagger_VehicleComponent.builder().vehicleModule(new VehicleModule()).build(); vehicle = component.provideVehicle(); Toast.m...

There are several ways interact with an Xml file. Xml Document XDocument XmlReader/XmlWriter Before LINQ to XML we were used XMLDocument for manipulations in XML like adding attributes, elements and so on. Now LINQ to XML uses XDocument for the same kind of thing. Syntaxes are much easie...

Opening a database is database specific, here there are examples for some databases. Sqlite 3 file := "path/to/file" db_, err := sql.Open("sqlite3", file) if err != nil { panic(err) } MySql dsn := "mysql_username:CHANGEME@tcp(localhost:3306)/dbname" db, e...

Token authentication functionality assigns a token to a user, so each time you use that token, the request object will have a user attribute that holds the user model information. Easy, isn’t it? We’ll create a new POST method to return the token for this user, as long as the request holds a correc...

Let’s create a new View that requires this authentication mechanism. We need to add these import lines: from rest_framework.authentication import TokenAuthentication from rest_framework.permissions import IsAuthenticated and then create the new View in the same views.py file class AuthView(AP...

Components let you split the UI into independent, reusable pieces. This is the beauty of React; we can separate a page into many small reusable components. Prior to React v14 we could create a stateful React component using React.Component (in ES6), or React.createClass (in ES5), irrespective of wh...

If you want to take a screenshot of a particular View v, then you can use the following code: Bitmap viewBitmap = Bitmap.createBitmap(v.getWidth(), v.getHeight(), Bitmap.Config.RGB_565); Canvas viewCanvas = new Canvas(viewBitmap); Drawable backgroundDrawable = v.getBackground(); if(backgroundD...

Below give solution can be also use in another supported programming languages with some syntax changes To do Scroll down page/section/division in webpage while there is custom scroll bar(Not browser scroll). Click Here For demo and check scroll bar has its independent element. In belo...

This examples uses the AES algorithm for encrypting passwords. The salt length can be up to 128 bit. We are using the SecureRandom class to generate a salt, which is combined with the password to generate a secret key. The classes used are already existing in Android packages javax.crypto and java....

image: openjdk:8-jdk before_script: - curl https://dl.google.com/dl/cloudsdk/release/google-cloud-sdk.tar.gz > /tmp/google-cloud-sdk.tar.gz - mkdir -p /usr/local/gcloud - tar -C /usr/local/gcloud -xvf /tmp/google-cloud-sdk.tar.gz - echo y |/usr/local/gclou...

Scala packages should follow the Java package naming conventions. Package names are written in all lower case to avoid conflict with the names of classes or interfaces. Companies use their reversed Internet domain name to begin their package names—for example, io.super.math

Reading the specification for the document formats in OpenXML can be a time consuming process. Sometimes you just want to see how to produce a certain feature in a word-document. The Open XML SDK 2.5 Productivity Tool for Microsoft Office (OpenXmlSdkTool.exe) does just that. Its main features are: ...

To add additional restriction to the poReceiptLinesSelection data view, you should invoke Select method on base view and inspect each item in returned PXResultSet independently to decide if it complies with additional restriction(s): public class APInvoiceEntryExt : PXGraphExtension<APInvoiceEn...

import redis r = redis.StrictRedis(host='localhost', port=6379, db=0) r.lpush('myqueue','myelement')