Can Your Programming Language Do This? - Joel on Software - The Diigo Meta page

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  • Without understanding functional programming, you can't invent MapReduce, the algorithm that makes Google so massively scalable.

    • 

      David Corking on 2009-07-03

      Without understanding the state of the art, you can't discover (or invent) the next big thing.
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  Joel waxes eloquent on JavaScript and functional programming languages. He points out the value of Google's "MapReduce" and the search advantage they have over Microsoft. Good stuff.

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  • The repeated code looks wrong
  • Maintainability, Readability, Abstraction = Good!
  • 4 more annotations...
  • • Notice that I'm creating a function there on the fly, not even bothering to name it, just picking it up by its ears and tossing it into a function.
    • If your programming language requires you to use functors, you're not getting all the benefits of a modern programming environment.
    • Google applications use MapReduce and they all benefit whenever someone optimizes it or fixes bugs.
    • the most productive programming environments are the ones that let you work at different levels of abstraction.
• 29 Mar 07
  

  aka equalium

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• 22 Feb 07
  

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• 07 Feb 07
  

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  Can Your Programming Language Do This?

  MapReduce

• 02 Jan 07
  

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  javascript languages map_reduce Functional-Programming Programming-Techniques Programming

  • By abstracting away the very concept of looping, you can implement looping any way you want, including implementing it in a way that scales nicely with extra hardware
  • Without understanding functional programming, you can't invent MapReduce,
  • 1 more annotations...
  • • programming languages with first-class functions let you find more opportunities for abstraction, which means your code is smaller, tighter, more reusable, and more scalable.
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  Good discussion on basic functional programming

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  Article on the flexibility of Javascript.

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  sofia

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  • Can Your Programming Language Do This?
  • Can Your Programming Language Do This?
• 

  acemarke

  A great description of map(), reduce(), and other foundations of functional programming.

  programming functional functions map reduce

• 01 Aug 06
  

  Dan Armano
• 

  mark

  functional programming

  • Many older languages simply had no way to do this kind of stuff. Other languages let you do it, but it's hard (for example, C has function pointers, but you have to declare and define the function somewhere else). Object-oriented programming languages aren't completely convinced that you should be allowed to do anything with functions.

    • 

      mark on 2006-08-01

      why yes C++ can and does - check out boost::lambda and boost::function
    • 

      ZENG Jie on 2006-08-06

      C++ is a multi-paradigm language, things like boost and stl are not completely object oriented. The technique enabling anonymous functions is called generic programming. C++ is powerful and complex:D
    • 2 more sticky notes...
    • • 

        on 2006-08-13

        What are you talking about? Functions are poor mans objects.
        
        Seriously though, it's not that you -can't- do this with OO languages, it's just painful.
      • 

        Aaron Griffin on 2006-10-23

        this isn't even about lambda really. The difference between a named function and an anonymous one are fairly trivial. C++ has had features to accomplish this with named methods circa 1998.
        See 'std::for_each' for an example. boost::lambda adds the ability to perform these operations with anonymous methods too.
• 

  Jacky

  programming

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  Ambi Rex
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  google joel mapreduce programming software

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  programering

Public Stiky Notes

• 
  Aaron Griffin on 2006-10-23
  this isn't even about lambda really. The difference between a named function and an anonymous one are fairly trivial. C++ has had features to accomplish this with named methods circa 1998.
  See 'std::for_each' for an example. boost::lambda adds the ability to perform these operations with anonymous methods too.
• 
  ZENG Jie on 2006-08-06
  C++ is a multi-paradigm language, things like boost and stl are not completely object oriented. The technique enabling anonymous functions is called generic programming. C++ is powerful and complex:D
• 
  mark on 2006-08-01
  why yes C++ can and does - check out boost::lambda and boost::function
• 
  David Corking on 2009-07-03
  Without understanding the state of the art, you can't discover (or invent) the next big thing.

Page Comments

• 
  Jacky on 2006-08-01
  Map 與 Reduce 的用法
• 
  sofia on 2006-08-03
  Functional programming - passing functions as arguments. Map reduce.

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