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CREATE [TEMPORARY] [EXTERNAL] TABLE [IF NOT EXISTS] [db_name.]table_name [(col_name data_type [COMMENT col_comment], ...)] [COMMENT table_comment] [PARTITIONED BY (col_name data_type [COMMENT col_comment], ...)] [CLUSTERED BY (col_name, col_name, ...) [SORTED BY (col_name [ASC|DESC], ...)] I...

Firebase Realtime Database Rules determine who has read and write access to your database, how your data is structured, and what indexes exist. These rules live on the Firebase servers and are enforced automatically at all times. Every read and write request will only be completed if your rules al...

References: proc Argument Expansion (section 5)

config.active_record.default_timezone determines whether to use Time.local (if set to :local) or Time.utc (if set to :utc) when pulling dates and times from the database. The default is :utc. http://guides.rubyonrails.org/configuring.html If you want to change Rails timezone, but continue ...

HTTP services normally run on port 80, but if you have some application installed like Skype which also utilizes port 80 then it won't start. In that case you need to change either its port or the port of the conflicting application. When done, restart the HTTP service.

Apache Camel is a framework that primarily facilitates solving enterprise integration challenges. At its core it can be thought of as a routing engine engine builder. In essence it allows you to connect systems(endpoints) via routes. These routes accept messages which can be of any data type. The...

A string's length can be measured in two ways: The most frequently used measure of length is the number of characters using the Len functions, but VBA can also reveal the number of bytes using LenB functions. A double-byte or Unicode character is more than one byte long.

// canOpenURL method verifies if there is any app which can handle indicated URL scheme. // Swift UIApplication.sharedApplication().canOpenURL(_ aUrl: NSURL) // Objective-C [[UIApplication sharedApplication] canOpenURL:(NSURL *)aUrl]; // openURL method tries to open a resource...

$(( EXPRESSION )) - Evaluates expression and returns its result. expr EXPRESSION - Prints result of EXPRESSION to stdout. ParameterDetailsEXPRESSIONExpression to evaluate A space (" ") is required between each term (or sign) of the expression. "1+2" won't work,...

getopts optstring name [args] ParameterDetailoptstringThe option characters to be recognizednameThen name where parsed option is stored Options optstring : The option characters to be recognized If a character is followed by a colon, the option is expected to have an argument, whi...

Single Abstract Methods are types, introduced in Java 8, that have exactly one abstract member.