Tutorial by Examples: e

Example 2

This example illustrates how the default key is chosen if we do not specify any c = groupby(['goat', 'dog', 'cow', 1, 1, 2, 3, 11, 10, ('persons', 'man', 'woman')]) dic = {} for k, v in c: dic[k] = list(v) dic Results in {1: [1, 1], 2: [2], 3: [3], ('persons', 'man', 'woman'): [('...

Python Language • groupby()

Example 3

Notice in this example that mulato and camel don't show up in our result. Only the last element with the specified key shows up. The last result for c actually wipes out two previous results. But watch the new version where I have the data sorted first on same key. list_things = ['goat', 'dog', 'do...

Python Language • groupby()

Example 4

In this example we see what happens when we use different types of iterable. things = [("animal", "bear"), ("animal", "duck"), ("plant", "cactus"), ("vehicle", "harley"), \ ("vehicle", "speed b...

Python Language • groupby()

Hive UDF to trim the given string.

package MyHiveUDFs; import org.apache.commons.lang.StringUtils; import org.apache.hadoop.hive.ql.exec.UDF; import org.apache.hadoop.io.Text; public class Strip extends UDF { private Text result = new Text(); public Text evaluate(Text str) { if(str == null) { return null; } resul...

hive • Hive User Defined Functions (UDF's)

Inheritance from Parent Class to Child Class

class ParentClass { [string] $Message = "Its under the Parent Class" [string] GetMessage() { return ("Message: {0}" -f $this.Message) } } # Bar extends Foo and inherits its members class ChildClass : ParentClass { } $Inherit = [ChildClass...

PowerShell • PowerShell Classes

Breadth First Search

Algorithm BFS(G) Input graph G Output labeling of the edges and partition of the vertices of G for all u ∈ G.vertices() setLabel(u, UNEXPLORED) for all e ∈ G.edges() setLabel (e, UNEXPLORED) for all v ∈ G.vertices() if getLabel(v) = UNEXPLORED ...

data-structures • Graph traversals

The Lambda operator ( -> )

From Java 8 onwards, the Lambda operator ( -> ) is the operator used to introduce a Lambda Expression. There are two common syntaxes, as illustrated by these examples: Java SE 8 a -> a + 1 // a lambda that adds one to its argument a -> { return a + 1; } // an equivalen...

Java Language • Operators

install the popular Clonezilla to clone a Mac OS hard drive (basic usage)

Naturally, being able to install hard drive cloning utilities can be an important aspect of installing and maintaining your operating system. Getting set up with Clonezilla is surprisingly less straightforward than I'd have expected. The wealth of options, while valuable, also makes each part of id...

operating-system • Getting started with operating-system

Master (HEAD)

index.html: <html ng-app="masterAngularMaterial"> <head>  <meta name="viewport" content="width=device-width, initial-scale=1">  ...

angular-material • Getting started with angular-material

Types of

Make sure you link the Angular and Angular Material libraries! index.html: <html ng-app="mdButtonApp"> <head>  <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.5.8/angular.min.js"></script&gt...

angular-material • md-button

Creating an icon button

This example will be using the class md-icon-button, which must be applied to <md-button> in order to get an icon button. It is also recommended to add an aria-label attribute to <md-button> for accessibility purpose or the ARIA provider will throw a warning that there is no aria-labe...

angular-material • md-button

Loading ESRI CSS

Starting with version 3.2 of the ArcGIS API for JavaScript, developers must include an additional Cascading Style Sheet (CSS) file: esri.css. The URL for this file is: // versions 3.11 and forward <link rel="stylesheet" href="https://js.arcgis.com/API-VERSION/esri/css/esri.css&...

arcgis • ArcGIS JS API

Loading Dojo specific CSS

The esri.css file does not include the CSS for various Dojo widgets or themes like tundra or claro; those files must be included separately. Exceptions are the Grid and RangeSlider, which are used by widgets in the API. Grid styles must be explicitly included. For instance, this CSS file would be i...

arcgis • ArcGIS JS API

Use generics to enhance type-safety

Let's take this example without using generics protocol JSONDecodable { static func from(_ json: [String: Any]) -> Any? } The protocol declaration seems fine unless you actually use it. let myTestObject = TestObject.from(myJson) as? TestObject Why do you have to cast the result to T...

Swift Language • Generics

Basic test

import { BrowserModule } from '@angular/platform-browser'; import { CommonModule } from '@angular/common'; import { FormsModule } from '@angular/forms'; import { HttpModule } from '@angular/http'; import { Component, DebugElement } from '@angular/core'; import { dispatchEvent } from "@an...

Angular 2 • Testing ngModel

phpversion()

Introduction When working with various libraries and their associated requirements, it is often necessary to know the version of current PHP parser or one of it's packages. This function accepts a single optional parameter in the form of extension name: phpversion('extension'). If the extension in...

PHP • Debugging

Basic Query

/* Define a query named q1 for the Customer table */ DEFINE QUERY q1 FOR Customer. /* Open the query for all Customer records where the state is "tx" */ OPEN QUERY q1 FOR EACH Customer WHERE Customer.state ='TX'. ...

progress-4gl • Queries

Multi-Tables Query

This query will join three tables: Customer, Order and Orderline. The use of the OF statement as in childtable OF parenttable assumes that indexes are constructed in a specific way. That is the case in the sports2000-database. DEFINE QUERY q1 FOR Customer, Order, Orderline. OPEN QUERY q1 FOR EA...

progress-4gl • Queries

Using informats to read data

Informats are used to tell SAS how to read in the data and are identified with an informat statement. data test; infile test.csv; informat id $6. date mmddyy10. cost comma10.2 ; input @1 id @7 date @20 cost ; run; Informats and Format...

sas • SAS Formats

Installation and Setup

Keras is a high-level neural networks library, written in Python and capable of running on top of either TensorFlow or Theano. It was developed with a focus on enabling fast experimentation. Being able to go from idea to result with the least possible delay is key to doing good research. Use Keras ...

keras • Getting started with keras