lodash.once

[qiuye-zhou]

type newOnceFun = {
    [propsName: string | symbol | number]: Function
}

type newOnceResult = {
    [propsName: string | symbol | number]: string | boolean | Function
}

class Once2 {
    private result: newOnceResult = {}
    private Fun: newOnceFun = {}

    once (type: string, fun: Function) {
        this.Fun[type] = fun
        this.result[type] = false
        return this.fun(this)
    }
    fun (that: Once2) {
        return function (type: string, ...args: any) {
            if (!that.result[type]) {
                console.log(`---${type}调用成功---`)
                that.result[type]= that.Fun[type](...args)
                if (!that.result[type]) {
                    that.result[type] = that.Fun[type]
                }
                return that.result[type]
            } else {
                return that.result[type]
            }
        }
    }
}

// 测试test

const newonce = new Once2()

const newonce1 = newonce.once('new1', function (str: string) {
    console.log(str)
})

newonce1('new1', '第一次调用的结果')

newonce1('new1', '第二次调用的结果')

const newonce2 = newonce.once('new2', function (str: string) {
    return `${str}---返回结果`
})

console.log(newonce2('new2', '第一次调用'))

console.log(newonce2('new2', '第二次调用'))

const newonce3 = newonce.once('new3', function (str: string) {
    return `${str}---once3`
})
const newonce4 = newonce.once('new4', function (str: string) {
    return `${str}---once4`
})


console.log(newonce3('new3', 'once3第一次调用的结果'))

console.log(newonce4('new4', 'once4第一次调用的结果'))

console.log('\n---下面是二次调用once3，once4---\n')

console.log(newonce3('new3', 'once3第二次调用'))

console.log(newonce4('new4', 'once4第二次调用'))