RajaniCode

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# MongoDB

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/*************************************************************************************************************************/

# MongoDB # macOS # services

/*************************************************************************************************************************/

RajaniCode

// Java 6 
/*
Java SE 6 adds no major features to the Java language proper, but it does enhance the API libraries, add several new packages, and offer improvements to the run time.
*/
/*
# Float and Double Constants MAX_EXPONENT
MIN_EXPONENT
MIN_NORMAL

# System Class 

RajaniCode

// Java 7

// JDK 7 // % java -version
// % export PATH="/Library/Java/JavaVirtualMachines/jdk1.7.0_80.jdk/Contents/Home/bin//":$PATH


// % zip "Archive.zip" *
// % javac Java7.java
// % javac Java7.java -Xlint:unchecked
// % java Java7

RajaniCode

// Java 8
/*
1. Lambda Expression
2. Method References
3. Default Interface Methods
4. Static Interface Methods
5. Functional Interfaces
6. Stream
7. Optional
8. Time API for dates, times, instants, and durations

RajaniCode

// CS 1
/*
Unified Type System - Data Types
|
|`-Value Types
| |
| |`--Built-in Value Types
| | |
| |  `---Built-in Structs
| |   |

RajaniCode

// CS 2
/*
1. Generics
2. Nullable types
3. Iterators
4. yield Statement
5. Partial Classes/Structs/Interfaces
6. Anonymous methods
7. The :: operator (Namespace Alias Qualifier)
8. Static Classes

RajaniCode

// CS 3
/*
1. Implicitly Typed Local Variables
2. Implicitly Typed Arrays
3. Query Expressions (LINQ)
4. Anonymous Types
5. Object and Collection Initializers
6. Extension Methods
7. Lambda Expressions
8. Expression Trees

RajaniCode

// CS 4
/*
1. Dynamic Binding
2. Optional Parameters
3. Named Arguments
4. Variance - Covariance and Contravariance
5. Tuple
*/

using System;

RajaniCode

// CS 5
/*
async
await
*/

// async
// The async is the modifier used to mark a method as asynchronous

using System;

RajaniCode

// CS 6
/*
1. Read-only Auto-properties
2. Auto-Property Initializers
3. Expression-bodied function members
4. using static
5. Null-conditional operators
6. String Interpolation
7. Exception filters
8. nameof Expressions