C# 3.0

posted on 28 Jan 2008 16:40 by wonam  in softdev

มี Web 2.0 ตอนนี้ก็มี C# 3.0

ประมาณสองปีก่อนใช้ C# สอนนิสิต หลาย ๆ อย่างก็คล้ายกับ Java แต่ก็มี feature หลาย ๆ อย่างที่น่าสนใจ เช่นการส่งค่าแบบ ref, in, และ out หรือการใช้ static analysis ที่เข้มแข็งขึ้น เช่นในกรณีของการใช้ตัวแปรที่ยังไม่ได้กำหนดค่า

เมื่อเช้าระหว่างเตรียมสอน ก็กด ๆ ดูข้อมูลเกี่ยวกับ C# 3.0 ที่ออกมาได้ไม่นานนัก (และได้ยินเพื่อนร่วมงานอีกคน (อ.ประมุข) กล่าวถึงมาหลายที) กดไปอ่านเว็บนี้: Concepts behind the C# 3.0 language

ในเชิงภาษาแล้ว C# วิ่งฉีกออกไปจาก Java อยู่ห่างเหมือนกัน (ผมไม่ได้หมายความว่าก้าวหน้า/ไกลกว่า/หรือว่าดีกว่านะครับ) ตั้งแต่มี closure ในรูปของ delegate (Java7 เพิ่งจะเพิ่ม closure เข้ามา) ตอนนี้ C# 3.0 เพิ่มคุณลักษณะมากมายมาจากภาษาเชิงฟังก์ชัน (เว็บด้านบนบอกว่าได้มาจากการทำภาษา F#) เช่นเรื่องของการทำ type inference หรือการที่มีฟังก์ชันเป็นแบบชนิดข้อมูลอันดับแรก

แปะลิงก์ให้ตัวเอง: Overview of C# 3.0 โดย Anders Hejlsberg, Mads Torgersen

คุยกับอาจารย์อีกท่าน ก็บอกว่าน่าจะเป็นการพัฒนาเชิงภาษาไปคนละเป้าหมาย เท่าที่มองผมก็ยังมองไม่ค่อยออกเหมือนกันว่าใครจะไปทางไหน และแต่ละภาษาจะมีเป้าหมายอย่างไร

หมายเหตุ: designer ของ C# นั้น (Anders Hejlsberg) เมื่อก่อนทำงานที่ Borland, เขาเป็นคนออกแบบ Turbo Pascal, Delphi, J++, .NET, และ C#

เพิ่มเติม:  (via veer) Comparison of C# and Java (ที่วิกิพีเดีย)

Tags: languages, programming30 Comments

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เหมือนทั้ง 2 ภาษากำลังจะกลายเป็น Scala? ส่วนต่างของ C# 3.0 กับ Java 7 คือ C# มี type inference และ Java 7 มี Annotation? หรือว่าผมอ่านอะไรตกไป?

#1 By veer on 2008-01-28 19:17

http://en.wikipedia.org/wiki/Comparison_of_C_Sharp_and_Java เจอละ :-D

#2 By veer on 2008-01-28 19:34

ว้าว ลิงก์เจ๋ง ขอเอาไปแปะเน้อ

#3 By wonam on 2008-01-28 21:50

การส่งค่าแบบ ref, in, และ out
** in เป็นการส่งค่าแบบไหนเหรอครับ ?

#4 By pongneng (58.10.152.178) on 2008-03-17 12:27

#4
in น่าจะเป็นใน foreach (มั่งนะ)

แต่ก้อดูๆใน 3.0 ไม่มี keywork in ในการ pass ค่า (หรือเปล่า)

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