Tutorial by Examples: d

mapWithState, similarly to updateState, can be used to create a stateful DStream based on upcoming data. It requires StateSpec: import org.apache.spark.streaming._ object StatefulStats { val state = StateSpec.function( (key: String, current: Option[Double], state: State[StatCounter]) =&g...

/** * @param n Number to be rounded. * @param precision Decimal places. * @return Rounded Number */ function roundDecimal(n:Number, precision:Number):Number { var factor:int = Math.pow(10, precision); return (Math.round(n * factor) / factor); } Examples: trace(0.9 - 1); // -0...

package { import flash.events.Event; public class CustomEvent extends Event { public static const START:String = "START"; public static const STOP:String = "STOP"; public var data:*; public function CustomEvent(type:Strin...

function meridiem(d:Date):String { return (d.hours > 11) ? "pm" : "am"; }

/** * @param year Full year as int (ex: 2000). * @param month Month as int, zero-based (ex: 0=January, 11=December). */ function daysInMonth(year:int, month:int):int { return (new Date(year, ++month, 0)).date; }

function isLeapYear(year:int):Boolean { return daysInMonth(year, 1) == 29; }

function isDaylightSavings(d:Date):Boolean { var months:uint = 12; var offset:uint = d.timezoneOffset; var offsetCheck:Number; while (months--) { offsetCheck = (new Date(d.getFullYear(), months, 1)).timezoneOffset; if (offsetCheck != offset) ret...

function today(date:Date = null):Date { if (date == null) date = new Date(); return new Date(date.fullYear, date.month, date.date, 0, 0, 0, 0); }

public function up() { $this->dropTable('post'); }

yii migrate/create create_post_table --fields="title:string,body:text" Generates: /** * Handles the creation for table `post`. */ class m150811_220037_create_post_table extends Migration { /** * @inheritdoc */ public function up() { $this->createTable('post', [ ...

public function up() { $this->dropColumn('post', 'position'); $this->renameColumn('post', 'owner_id', 'user_id'); $this->alterColumn('post', 'updated', $this->timestamp()->notNull()->defaultValue('0000-00-00 00:00:00')); }

public function up() { $this->addColumn('post', 'position', $this->integer()); }

By default, migrations are applied to the same database specified by the db application component. If you want them to be applied to a different database, you may specify the db command-line option like shown below: yii migrate --db=db2

yii migrate/redo # redo the last applied migration yii migrate/redo 3 # redo the last 3 applied migrations

yii migrate/mark 150101_185401 # using timestamp to specify the migration yii migrate/mark "2015-01-01 18:54:01" # using a string that can be parsed by strtotime() yii migrate/mark m150101_185401_create_news_table # using full name yii migrate/mark 13...

AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder( MainActivity.this); alertDialogBuilder.setTitle("Title Dialog"); alertDialogBuilder .setMessage("Message Dialog") .setCancelable(true) ...

A simple bit-field can be used to describe things that may have a specific number of bits involved. struct encoderPosition { unsigned int encoderCounts : 23; unsigned int encoderTurns : 4; unsigned int _reserved : 5; }; In this example we consider an encoder with 23 bits of sin...

We can use Predefined Constants for Date format in date() instead of the conventional date format strings since PHP 5.1.0. Predefined Date Format Constants Available DATE_ATOM - Atom (2016-07-22T14:50:01+00:00) DATE_COOKIE - HTTP Cookies (Friday, 22-Jul-16 14:50:01 UTC) DATE_RSS - RSS (Fri, 22...

Technically, autoloading works by executing a callback when a PHP class is required but not found. Such callbacks usually attempt to load these classes. Generally, autoloading can be understood as the attempt to load PHP files (especially PHP class files, where a PHP source file is dedicated for a ...

A std::vector can be useful for returning a dynamic number of variables of the same type. The following example uses int as data type, but a std::vector can hold any type that is trivially copyable: #include <vector> #include <iostream> // the following function returns all integers...