Tutorial by Examples: d

Node js code Sample to start this topic is Node.js server communicating with Arduino via serialport. npm install express --save npm install serialport --save Sample app.js: const express = require('express'); const app = express(); var SerialPort = require("serialport"); var po...

Suppose we have this source file that we would like to split: cat -n sourcefile 1 On the Ning Nang Nong 2 Where the Cows go Bong! 3 and the monkeys all say BOO! 4 There's a Nong Nang Ning 5 Where the trees go Ping! 6 And the tea pots jibber jabber joo. 7 On the Nong Ning Nang Comma...

To install PLY on your machine for python2/3, follow the steps outlined below: Download the source code from here. Unzip the downloaded zip file Navigate into the unzipped ply-3.10 folder Run the following command in your terminal: python setup.py install If you completed all the above, you...

Let's demonstrate the power of PLY with a simple example: this program will take an arithmetic expression as a string input, and attempt to solve it. Open up your favourite editor and copy the following code: from ply import lex import ply.yacc as yacc tokens = ( 'PLUS', 'MINUS', ...

This section explains how the tokenized input from Part 1 is processed - it is done using Context Free Grammars (CFGs). The grammar must be specified, and the tokens are processed according to the grammar. Under the hood, the parser uses an LALR parser. # Yacc example import ply.yacc as yacc ...

Snippet from MainPage.xaml <Page x:Class="MyNewApp.MainPage" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:local="using:MyNewApp" xmlns:d="http...

Almost usually things are a little bit more complex and to support scalability we should split things apart. So we can define various files containing different resources dictionaries, i.e. resources for UI controls' themes, resources for texts and so on, then we merge them all together in App.xaml ...

This method extends the jQuery prototype ($.fn) object to provide new custom methods that can be chained to the jQuery() function. For example: <div>Hello</div> <div>World!</div> <script> jQuery.fn.extend({ // returns combination of div texts as a result g...

You can add custom post type posts on default wordpress search, Add below code in theme functions.php function my_search_filter($query) { if ( !is_admin() && $query->is_main_query() ) { if ($query->is_search) { $query->set('post_type', array( 'news','post','article' ...

This example is a custom data layer, that receives a text file with image paths, loads a batch of images and preprocesses them. Just a quick tip, Caffe already has a big range of data layers and probably a custom layer is not the most efficient way if you just want something simple. My dataLayer.py...

from urllib.request import urlopen from collections import Counter import re conn = urlopen('http://textfiles.com/100/dodontae.hum') lines = conn.readlines() conn.close() # readlines() returns byte strings data = ''.join([line.decode('utf-8') for line in lines]) # replace non-letters ...

public void setCardColorTran(CardView card) { ColorDrawable[] color = {new ColorDrawable(Color.BLUE), new ColorDrawable(Color.RED)}; TransitionDrawable trans = new TransitionDrawable(color); if(Build.VERSION.SDK_INT > Build.VERSION_CODES.ICE_CREAM_SANDWICH_MR1) { card.setB...

public void setCardColorTran(View view) { ColorDrawable[] color = {new ColorDrawable(Color.BLUE), new ColorDrawable(Color.RED)}; TransitionDrawable trans = new TransitionDrawable(color); if(Build.VERSION.SDK_INT < android.os.Build.VERSION_CODES.JELLY_BEAN) { view.setBackgrou...

As already mentioned you can declare an unordered map of any type. Let's have a unordered map named first with string and integer type. unordered_map<string, int> first; //declaration of the map first["One"] = 1; // [] operator used to insert the value first["Two"] = 2...

The following steps need to be done in the app.ionic.io Create an account or login into your ionic account Click "New App" in the Dashboard and give name for your app I named my app as 'MyIonicApp' In the overview section of this newly created app, there will be a ID...

Most Singleton examples use MonoBehaviour as the base class. The main disadvantage is that this Singleton class only lives during run time. This has some drawbacks: There is no way of directly editing the singleton fields other than changing the code. No way to store a reference to other assets...

Suppose you are comparing value with some variable if ( i == 2) //Bad-way { doSomething; } Now suppose you have mistaken == with =. Then it will take your sweet time to figure it out. if( 2 == i) //Good-way { doSomething; } Then, if an equal sign is accidentally left out, the ...

Download the latest apache commons daemon from Apache Commons Project Distributions. Extract the commons daemon in <Cassandra installed directory>\bin. Rename the extracted folder as daemon. Add <Cassandra installed directory> as CASSANDRA_HOME in windows environment v...

Background Model Listener hook's are a type of Liferay plugin that listens for events taken on an model and executes code in response. Model Listener hooks are similar to Custom Struts Action hooks in that they respond to an action taken in the portal. However while Struts actions respond to an a...

CHMOD Calculation CHMOD is binary. _ / _ _ _ / _ _ _ / _ _ _ = _/4+2+1/4+2+1/4+2+1 = 777 = _/rwx/rwx/rwx = 777 Therefore _rwx = _/4+2+1 = 7 D / _ _ _ / _ _ _ / _ _ _ (‘D’ = directory, another use is L = Link) So e.g. _rwxr_xr_x = _/rwx/rx/r_x = 755