In this article, I'll continue this tour of concepts by talking about first-class functions, optimizations, and closures.
在本文中，我将继续讨论这些概念，讲解一级函数、优化和闭包。
Specifically, functional programming languages must provide high-order and first-class functions, which this article defines.
特别地，函数式编程语言必须提供高阶和一流的函数，这是本文所定义的。
In functional programming, you have far fewer abstractions, but each one is generic (with specificity added via first-class functions).
在函数式编程中，您拥有更少的抽象，但是每个抽象都具有通用性(通过一等函数添加特性)。
The Permissions configuration class functions as a container for static enum types that configure the permissions in a particular application using EAz.
Permissions配置类可用作在特定的应用程序中使用Eaz配置权限的静态Enum类型的容器。
You can see that once you become accustomed to thinking in terms of higher-order and first-class functions, you can reduce (pun intended) a lot of noise in your code.
您会看到，一旦您习惯了从高阶和一级函数的角度思考，您就能减少（一语双关）代码中无用的部分。
Its applications in constructing nonlinear combining functions are studied and some constructional theorems based on this class functions are obtained.
研究了这类函数在非线性组合函数构造中的应用，得到了几个基于这类函数的构造定理。
Note: the query optimizer considers using a functional index when the index expression is used in a relational expression or as an argument to one of the operator class functions.
注意：当索引表达式被用于关系表达式，或作为某个操作符类函数的参数时，查询优化器将考虑使用函数索引。
Functional languages rely on first-class functions (functions that can appear anywhere any other language construct can appear) as parameters and return values. Figure 3 illustrates this concept.
函数式语言依赖于一等函数(可在任何其他语言结构可能出现的地方出现的函数)作为参数和返回值。
Functional language constructs such as higher-order and first-class functions allow me to climb one more rung up the abstraction ladder and focus more on what the code does rather than how it does it.
函数语言结构，如高阶和一级函数，能让我对抽象的理解更进一步，让我更多地将精力放在代码能做什么而不是怎么做 上。
Functional language constructs such as higher-order and first-class functions allow me to climb one more rung up the abstraction ladder and focus more on what the code does rather than how it does it.
函数语言结构，如高阶和一级函数，能让我对抽象的理解更进一步，让我更多地将精力放在代码能做什么而不是怎么做 上。
应用推荐