The isequal from jsmini

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关于中间件的讨论

对更多类型支持，这些类型不太常用，可以通过中间件的方式提供，比如函数，arraybuffer，dom等

function functionMiddleware(opt) {
    return (value, other, next) => {
        if (typeof value === 'function' && typeof other === 'function') {
            return value.name === other.name
        }
        return next(value, other, next)
    }
}

isEqual(a, b, functionMiddleware())

更希望的方式是多个中间件可以组合

import { compose } from '@jsmini/functional';

function functionMiddleware1(opt) {
    return next => (value, other) => {
        if (typeof value === 'function' && typeof other === 'function') {
            return value.name === other.name
        }
        return next(value, other, next)
    }
}

function functionMiddleware2(opt) {
    return next => (value, other) => {
        if (typeof value === 'function' && typeof other === 'function') {
            return value.name === other.name
        }
        return next(value, other, next)
    }
}

isEqual(a, b, functionMiddleware1()) // 单个
isEqual(a, b, compose(functionMiddleware1(), functionMiddleware2())) // 多个

function isEqual(value, other, enhancer) {
  // ...
  if(type(enhancer) === 'function') {
        const res = enhancer(value, other, next);
        // 兼容两种调用方式
        return typeof res === 'function' ?  enhancer(next)(value, other) : res;
  }
  // ...
}

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