Tutorial by Examples: if

Train a custom classifier

Training a custom classifier requires a corpus of images organized into groups. In this example, I have a bunch of images of apples in one ZIP file, a bunch of images of bananas in another ZIP file, and a third group of images of things that are not fruits for a negative set. Once a custom classif...

ibm-watson-cognitive • Visual Recognition

Delete a custom classifier

'use strict'; let watson = require('watson-developer-cloud'); let fs = require('fs'); var visualRecognition = watson.visual_recognition({ version: 'v3', api_key: process.env.API_KEY, version_date:'2016-05-19' }); let classifier_id_to_delete = 'TheNameofMyClassifier_485506080'; ...

ibm-watson-cognitive • Visual Recognition

Classify an Image

Prerequisites First, you have to install the watson-developer-cloud SDK. $ npm install watson-developer-cloud Classify an image URL We'll use an image of Captain America from Wikipedia. 'use strict'; let watson = require('watson-developer-cloud'); var visualRecognition = watson.visual...

ibm-watson-cognitive • Visual Recognition

Specifying namespaces

SQL Server 2008 WITH XMLNAMESPACES ( DEFAULT 'http://www.w3.org/2000/svg', 'http://www.w3.org/1999/xlink' AS xlink ) SELECT 'example.jpg' AS 'image/@xlink:href', '50px' AS 'image/@width', '50px' AS 'image/@height' FOR XML PATH('svg') <svg xmlns:xlink="http:...

Microsoft SQL Server • FOR XML PATH

Specifying structure using XPath expressions

SELECT 'XPath example' AS 'head/title', 'This example demonstrates ' AS 'body/p', 'https://www.w3.org/TR/xpath/' AS 'body/p/a/@href', 'XPath expressions' AS 'body/p/a' FOR XML PATH('html') <html> <head> <title>XPath example</title> &...

Microsoft SQL Server • FOR XML PATH

Bitwise Left Shift

The << operator will perform a bitwise "left shift," where the left operand's value is moved left by the number of bits given by the right operand. # 2 = 0b10 2 << 2 # Out: 8 # 8 = 0b1000 bin(2 << 2) # Out: 0b1000 Performing a left bit shift of 1 is equivalent ...

Python Language • Bitwise Operators

Bitwise Right Shift

The >> operator will perform a bitwise "right shift," where the left operand's value is moved right by the number of bits given by the right operand. # 8 = 0b1000 8 >> 2 # Out: 2 # 2 = 0b10 bin(8 >> 2) # Out: 0b10 Performing a right bit shift of 1 is equivalent...

Python Language • Bitwise Operators

Handling Attributes with Different Languages

You can "overwrite" a parent element's language declaration by introducing any element apart from applet, base, basefont, br, frame, frameset, hr, iframe, meta, param, script (of HTML 4.0) with an own lang attribute: <p lang="en" title="An English paragraph"> ...

HTML • Content Languages

Input a string, modify it in C, and output it

In this example, we illustrate string manipulation in MATLAB MEX. We will create a MEX-function that accepts a string as input from MATLAB, copy the data into C-string, modify it and convert it back to mxArray returned to the MATLAB side. The main objective of this example is to show how strings ca...

MATLAB Language • Introduction to MEX API

SMS Notifications with Twilio

Swap out AccountSid, AuthToken, ToPhoneNumber and FromPhoneNumber for your credentials/intended recipients. You need to ensure that if the ToPhoneNumber and FromPhoneNumber have + in them, they are urlencoded (ie: as %2B) notification sms { post = https://{AccountSid}:{Authtoken}@api.twilio.co...

Bosun • Notifications: Overview

Finding a specific container

docker ps --filter name=myapp_1

Docker • Managing containers

More complex specificity example

div { font-size: 7px; border: 3px dotted pink; background-color: yellow; color: purple; } body.mystyle > div.myotherstyle { font-size: 11px; background-color: green; } #elmnt1 { font-size: 24px; border-color: red; } .mystyle .myotherstyle { ...

CSS • Cascading and Specificity

Difference between ENTRYPOINT and CMD

There are two Dockerfile directives to specify what command to run by default in built images. If you only specify CMD then docker will run that command using the default ENTRYPOINT, which is /bin/sh -c. You can override either or both the entrypoint and/or the command when you start up the built im...

Docker • Building images

Arrays union, intersection and difference

x = [5, 5, 1, 3] y = [5, 2, 4, 3] Union (|) contains elements from both arrays, with duplicates removed: x | y => [5, 1, 3, 2, 4] Intersection (&) contains elements which are present both in first and second array: x & y => [5, 3] Difference (-) contains elements which ar...

Ruby Language • Arrays

Difference between single-quoted and double-quoted String literals

The main difference is that double-quoted String literals support string interpolations and the full set of escape sequences. For instance, they can include arbitrary Ruby expressions via interpolation: # Single-quoted strings don't support interpolation puts 'Now is #{Time.now}' # Now is #{Time...

Ruby Language • Strings

Differences between range and xrange functions

In Python 2, range function returns a list while xrange creates a special xrange object, which is an immutable sequence, which unlike other built-in sequence types, doesn't support slicing and has neither index nor count methods: Python 2.x2.3 print(range(1, 10)) # Out: [1, 2, 3, 4, 5, 6, 7, 8, 9...

Python Language • Incompatibilities moving from Python 2 to Python 3

Creating Controllers, Minification safe

There are a couple different ways to protect your controller creation from minification. The first is called inline array annotation. It looks like the following: var app = angular.module('app'); app.controller('sampleController', ['$scope', '$http', function(a, b){ //logic here }]); The...

AngularJS • Controllers

Inline if/unless

A common pattern is to use an inline, or trailing, if or unless: puts "x is less than 5" if x < 5 This is known as a conditional modifier, and is a handy way of adding simple guard code and early returns: def save_to_file(data, filename) raise "no filename given" if fi...

Ruby Language • Control Flow

Access Modifiers

The Dim statement should be reserved for local variables. At module-level, prefer explicit access modifiers: Private for private fields, which can only be accessed within the module they're declared in. Public for public fields and global variables, which can be accessed by any calling code. Fr...

VBA • Declaring Variables

Creating a virtual environment for a different version of python

Assuming python and python3 are both installed, it is possible to create a virtual environment for Python 3 even if python3 is not the default Python: virtualenv -p python3 foo or virtualenv --python=python3 foo or python3 -m venv foo or pyvenv foo Actually you can create virtual ...

Python Language • Virtual environments