Tutorial by Examples: p

lineWidth (A path styling attribute)

context.lineWidth=lineWidth Sets the width of the line that will stroke the outline of the path <!doctype html> <html> <head> <style> body{ background-color:white; } #canvas{border:1px solid red; } </style> <script> window.onload=(function(){...

html5-canvas • Path (Syntax only)

shadowColor, shadowBlur, shadowOffsetX, shadowOffsetY (path styling attributes)

shadowColor = color // CSS color shadowBlur = width // integer blur width shadowOffsetX = distance // shadow is moved horizontally by this offset shadowOffsetY = distance // shadow is moved vertically by this offset This set of attributes will add a shadow around a path. Bo...

html5-canvas • Path (Syntax only)

createLinearGradient (creates a path styling object)

var gradient = createLinearGradient( startX, startY, endX, endY ) gradient.addColorStop(gradientPercentPosition, CssColor) gradient.addColorStop(gradientPercentPosition, CssColor) [optionally add more color stops to add to the variety of the gradient] Creates a reusable linear gradient (object...

html5-canvas • Path (Syntax only)

createRadialGradient (creates a path styling object)

var gradient = createRadialGradient( centerX1, centerY1, radius1, // this is the "display' circle centerX2, centerY2, radius2 // this is the "light casting" circle ) gradient.addColorStop(gradientPercentPosition, CssColor) gradient.addColorStop(gradientPerce...

html5-canvas • Path (Syntax only)

RegExp Groups

JavaScript supports several types of group in it's Regular Expressions, capture groups, non-capture groups and look-aheads. Currently, there is no look-behind support. Capture Sometimes the desired match relies on it's context. This means a simple RegExp will over-find the piece of the String that...

JavaScript • Regular expressions

Chaining multiple iterators together

Use itertools.chain to create a single generator which will yield the values from several generators in sequence. from itertools import chain a = (x for x in ['1', '2', '3', '4']) b = (x for x in ['x', 'y', 'z']) ' '.join(chain(a, b)) Results in: '1 2 3 4 x y z' As an alternate constructo...

Python Language • Itertools Module

Function with one template

import std.stdio; T min(T)(in T arg1, in T arg2) { return arg1 < arg2 ? arg1 : arg2; } void main() { //Automatic type inference writeln(min(1, 2)); //Explicit type writeln(min!(ubyte)(1, 2)); //With single type, the parenthesis might be ommited ...

D Language • Templates

Defining functions for calling from template

package main import ( "fmt" "net/http" "os" "text/template" ) var requestTemplate string = ` {{range $i, $url := .URLs}} {{ $url }} {{(status_code $url)}} {{ end }}` type Requests struct { URLs []string } func main() {...

Go • Templates

Specify configuration file to load

nginx -c <file name> Start NGINX with an explicit configuration file.

nginx • Nginx Configurations

JSON with play-json

play-json uses implicit formats as other json frameworks SBT dependency: libraryDependencies += ""com.typesafe.play" %% "play-json" % "2.4.8" import play.api.libs.json._ import play.api.libs.functional.syntax._ // if you need DSL DefaultFormat contains defaul...

Scala Language • JSON

Enable Compression (Apache 2.0+)

Enabling gzip compression can reduce the size of the transferred response by up to 90%, which can significantly reduce the amount of time to download the resource, reduce data usage for the client, and improve the time to first render of your pages. — PageSpeed Insights Compression can be ena...

Hypertext Access file • Speed Optimization

Leverage Browser Caching (Apache 2.0+)

Fetching resources over the network is both slow and expensive: the download may require multiple roundtrips between the client and server, which delays processing and may block rendering of page content, and also incurs data costs for the visitor. All server responses should specify a caching p...

Hypertext Access file • Speed Optimization

Arithmetic operators

Arithmetic operators in C++ have the same precedence as they do in mathematics: Multiplication and division have left associativity(meaning that they will be evaluated from left to right) and they have higher precedence than addition and subtraction, which also have left associativity. We can also...

C++ • operator precedence

Logical AND and OR operators

These operators have the usual precedence in C++: AND before OR. // You can drive with a foreign license for up to 60 days bool can_drive = has_domestic_license || has_foreign_license && num_days <= 60; This code is equivalent to the following: // You can drive with a foreign licens...

C++ • operator precedence

std::next_permutation

template< class Iterator > bool next_permutation( Iterator first, Iterator last ); template< class Iterator, class Compare > bool next_permutation( Iterator first, Iterator last, Compare cmpFun ); Effects: Sift the data sequence of the range [first, last) into the next lexicograph...

C++ • Standard Library Algorithms

Installing Plugin from external source

java -jar [Path to client JAR] -s [Server address] install-plugin [Plugin ID] The client JAR must be the CLI JAR file, not the same JAR/WAR that runs Jenkins itself. Unique IDs can be found on a plugins respective page on the Jenkins CLI wiki (https://wiki.jenkins-ci.org/display/JENKINS/Plugins) ...

jenkins • Getting started with jenkins

Conversion between pointer and integer

An object pointer (including void*) or function pointer can be converted to an integer type using reinterpret_cast. This will only compile if the destination type is long enough. The result is implementation-defined and typically yields the numeric address of the byte in memory that the pointer poin...

C++ • Explicit type conversions

Portuguese DateTime Localization

Highcharts.setOptions({ lang: { loading: 'Aguarde...', months: ['Janeiro', 'Fevereiro', 'Março', 'Abril', 'Maio', 'Junho', 'Julho', 'Agosto', 'Setembro', 'Outubro', 'Novembro', 'Dezembro'], weekdays: ['Domingo', 'Segunda', 'Terça', 'Quarta', 'Quinta', 'Sex...

highcharts • Localization

Spanish DateTime Localization

Highcharts.setOptions({ lang: { loading: 'Cargando...', months: ['Enero', 'Febrero', 'Marzo', 'Abril', 'Mayo', 'Junio', 'Julio', 'Agosto', 'Septiembre', 'Octubre', 'Noviembre', 'Diciembre'], weekdays: ['Domingo', 'Lunes', 'Martes', 'Miércoles', 'Jueves', '...

highcharts • Localization

Polish DateTime Localization

Highcharts.setOptions({ lang: { loading: 'Ładowanie...', months: ['Styczeń', 'Luty', 'Marzec', 'Kwiecień', 'Maj', 'Czerwiec', 'Lipiec', 'Sierpień', 'Wrzesień', 'Październik', 'Listopad', 'Grudzień'], weekdays: ['Niedziela', 'Poniedziałek', 'Wtorek', 'Ś...

highcharts • Localization