Tutorial by Examples: a

Create a new Exception that can be caught

class CompileError(Exception): pass

Python Language • The pass statement

Firebase Push Notification in Cordova Android

Add Firebase to Your Android Project Add Firebase to your app To add Firebase to your app you'll need a Firebase project and a Firebase configuration file for your app. Create a Firebase project in the Firebase console, if you don't already have one. If you already have an existing Google proje...

Cordova • Firebase Push Notification Cordova

Running a Command twice

A Cmd cannot be reused after calling its Run, Output or CombinedOutput methods Running a command twice will not work: cmd := exec.Command("xte", "key XF86AudioPlay") _ := cmd.Run() // Play audio key press // .. do something else err := cmd.Run() // Pause audio key press,...

Go • Executing Commands

Passing Parameters to a route

Parameters can be specified in path property of route configuration 'use strict'; const Hapi = require('hapi'); // Create a server with a host and port const server = new Hapi.Server(); server.connection({ host: 'localhost', port: 8000 }); // Add a route path with url par...

hapijs • Getting started with hapijs

Accessing the TextBox Control in aspx Page

TextBox txt = (TextBox)FindControl(yourtxt_Id);

ASP.NET • Find Control by ID

Try not to panic

In Rust, there are two main methods to indicate something has gone wrong in a program: A function returning a (potentially custom-defined) Err(E), from the Result<T, E> type and a panic!. Panicking is not an alternative for exceptions, which are commonly found in other languages. In Rust, a p...

Rust • Panics and Unwinds

Creating Arrays

Creating arrays explicitly using ArrayNew() Declare an array with the ArrayNew function. Specify the number of dimensions as an argument. ArrayNew(dimension) creates an array of 1–3 dimensions. ColdFusion arrays expand dynamically as data is added. ArrayNew() returns an array. History Intr...

coldfusion • ColdFusion Arrays

Displaying all elements in the index

To view all elements in the index change the print options that “sparsifies” the display of the MultiIndex. pd.set_option('display.multi_sparse', False) df.groupby(['A','B']).mean() # Output: # C # A B # a 1 107 # a 2 102 # a 3 115 # b 5 92 # b 8 98 # c 2 87 # c 4 104 #...

pandas • MultiIndex

Count Unique values in Range

Function countUnique(r As range) As Long 'Application.Volatile False ' optional Set r = Intersect(r, r.Worksheet.UsedRange) ' optional if you pass entire rows or columns to the function Dim c As New Collection, v On Error Resume Next ' to ignore the Run-time error 457: "Th...

excel-vba • User Defined Functions (UDFs)

Format Excel files with xlsxwriter

import xlsxwriter # create a new file workbook = xlsxwriter.Workbook('your_file.xlsx') # add some new formats to be used by the workbook percent_format = workbook.add_format({'num_format': '0%'}) percent_with_decimal = workbook.add_format({'num_format': '0.0%'}) bold = workbook.add_forma...

Python Language • Python and Excel

Character modifications

Character modifying functions include converting characters to upper or lower case characters, converting numbers to formatted numbers, performing character manipulation, etc. The lower(char) function converts the given character parameter to be lower-cased characters. SELECT customer_id, lower(cu...

SQL • Functions (Scalar/Single Row)

Big Data example

Big data is a term for data sets that are so large or complex that traditional data processing applications are inadequate to deal with them. Challenges include analysis, capture, data curation, search, sharing, storage, transfer, visualization, querying, updating and information privacy. A general...

bigdata • Getting started with bigdata

This is part of the layout file

<?php /* this example is based on the advanced template * This file is located in * backend/views/layouts/main.php */ use yii\helpers\Html; // here the asset is registered use cinghie\adminlte\AdminLTEAsset; AdminLTEAsset::register($this); ?> <?php $this->beginPage...

yii2 • Asset management

This is the Asset File

<?php /** * This file is the Asset Bundle File located in * vendor/cinghie/yii2-admin-lte/AdminLTEAsset.php * @copyright Copyright &copy; Gogodigital Srls * @company Gogodigital Srls - Wide ICT Solutions * @website http://www.gogodigital.it * @github https://github.com/cinghie/yii...

yii2 • Asset management

The generated HTML with automaticaly loaded assets

<!DOCTYPE html> <html lang="en-EN"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <meta name="csrf-param" content="_csrf"> <me...

yii2 • Asset management

Explicit Wait in Python

When browser navigates to a dynamic page (most commonly AJAX-based web application), the elements on the page can take different time to load, and furthermore: some elements will only load in response to some user actions. In such cases direct retrieval of an element may fail: # Don't do this: may ...

selenium • Waiting in Selenium

Create your own collection and use it to collect all your losses.

Here we will create collection for losses of Neural Network's computational graph. First create a computational graph like so: with tf.variable_scope("Layer"): W = tf.get_variable("weights", [m, k], initializer=tf.zeros_initializer([m, k], dtype=tf.float32)) ...

tensorflow • How to use TensorFlow Graph Collections?

Installation or Setup

Detailed instructions on getting logstash set up or installed.

logstash • Getting started with logstash

More on Packages

In the Hello World, you were introduced to the package Ada.Text_IO, and how to use it in order to perform I/O operations within your program. Packages can be further manipulated to do many different things. Renaming: To rename a package, you use the keyword renames in a package declaration, as such...

ada • Packages

Using an Icon

The <use> element is often used for reuseable icons, in collaboration with the <symbol> element. That looks like this: <svg> <symbol viewBox="0 0 16 16" id="icon-star"> <path d="M16 6.216l-6.095-.02L7.98.38 6.095 6.196 0 6.215h.02l4....

SVG • use