React

<></>语法失效

babel的问题，需要babel支持
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SICP

1.1 The Elements of Programming

we should pay particular attention to the means that the language provides for combining simple ideas to form more complex ideas. Every powerful language has three mechanisms for accomplishing this:

  • primitive expressions, which represent the simplest entities the language is concerned with,
  • means of combination, by which compound elements are built from simpler ones, and
  • means of abstraction, by which compound elements can be named and manipulated as units.

通用语言的组成：基础表达式，组合的方式，抽象的方式

Informally, data is _stuff _that we want to manipulate, and functions are descriptions of the rules for manipulating the data. Thus, any powerful programming language should be able to describe primitive data and primitive functions and should have methods for combining and abstracting functions and data.
数据是操作对象，函数是描述操作数据的方式。所以语言需要提供 组合和抽象 函数和数据 的方法。