Tutorial by Topics: s

The QDialog class is the base class of dialog windows. A dialog window is a top-level window mostly used for short-term tasks and brief communications with the user. QDialogs may be modal or modeless. Note that QDialog (and any other widget that has type Qt::Dialog) uses the parent widget slight...

ParamDetailsObject(Object) The JSON objectReplacer(Function | Array<string | number> - optiotinal) filter Function | ArraySpace(Number | string - optional) Amount of white space in the JSON

One thing to note is your resources versus the size of data you are joining. This is where your Spark Join code might fail giving you memory errors. For this reason make sure you configure your Spark jobs really well depending on the size of data. Following is an example of a configuration for a j...

You create SuiteScript customizations using an event-driven system. You define various types of Script records, each of which has its own unique set of events, and in your source file, you define functions that will be called to handle those events as they occur. Scripts are one of the primary comp...

References: akka.io/docs Check out my blog: https://blog.knoldus.com/2016/08/07/supervision-and-monitoring-in-akka/

Protocols and Delegates are two related but different concept: A Protocol is a interface a class can conforms to, meaning that class implements the listed methods. A Delegate is typically an anonymous object that conforms to a protocol. The application of Delegate called Delegation is a design ...

Traditionally, a literal is an expression denoting a constant whose type and value are evident from its spelling. For example, 42 is a literal, while x is not since one must see its declaration to know its type and read previous lines of code to know its value. However, C++11 also added user-define...

The Cassandra Driver from Datastax very much mirrors the Java JDBC MySQL driver. Session, Statement, PreparedStatement are present in both drivers. The Singleton Connection is from this question and answer: http://stackoverflow.com/a/24691456/671896 Feature wise, Cassandra 2 and 3 are identical...

When you need to handle time information for a worldwide user base in MySQL, use the TIMESTAMP data type in your tables. For each user, store a user-preference timezone column. VARCHAR(64) is a good data type for that column. When a user registers to use your system, ask for the time zone value. ...

You need to be at MySQL version 5.6.4 or later to declare columns with fractional-second time datatypes. For example, DATETIME(3) will give you millisecond resolution in your timestamps, and TIMESTAMP(6) will give you microsecond resolution on a *nix-style timestamp. Read this: http://dev.mysql....