Question

这是工作中的测试任务。

一位农民有兔子。每只兔子都是它的重量。到时候，他杀死了他们的职能cut(rabbit)。你必须写一个cut的函数，使它具有外观 cut(rabbit1)(rabbit2)...(rabbitN)并推断出兔子的总质量和数量。

例如：

var rabbit1 = {weight: 5},
    rabbit2 = {weight: 4};

console.log(cut(rabbit1)(rabbit2));

在控制台中，我们将看到“9公斤兔子或2件”。

JSFiddle - https://jsfiddle.net/sjao7ut8/

我如何编写函数cut()？

Answer 1

您可以使用链接，一个流畅的界面，它返回您调用的函数，直到环境需要原始值。

function cut(rabbit) {
    var weight = 0,
        count = 0,
        fn = function (o) {
            weight += o.weight;
            count++;
            return fn;
        };

    fn.toString = function () {
        return weight + ' kg of rabbits or ' + count + ' piece' + (count > 1 ? 's' : '');
    }

    return fn(rabbit);
}

var rabbit1 = { weight: 5 },
    rabbit2 = { weight: 4 };
    
console.log(cut(rabbit1)(rabbit2));

Answer 2

你需要做的是使用递归调用，它返回一个函数并使用arguments.callee

这样的事情应该可以胜任：

function cut(firstRabbit) {
    var mass = firstRabbit.weight;
    return function(nextRabbit) {
        if (typeof nextRabbit !== 'undefined') {
            mass += nextRabbit.weight;
            return arguments.callee;
        } else {
            return mass;
        }
    };
}

示例用法（记得在最后添加（））：

var rabbit1 = {weight: 5},
rabbit2 = {weight: 4};

console.log(cut(rabbit1)(rabbit2)());

Answer 3

您可以尝试以下代码：

var farmer = { 
    cut: function(rabits) { 
    var cutWeight = 10;
    var totalCuts = 0;
    var totalWeight = 0;
    var count = rabits.length;

    for(var i=0; i < count; i++) {
        var rabit = rabits[i];

      if(rabit.weight >= cutWeight) {
        totalWeight += rabit.weight;
        if(totalCuts === 0) {
            totalCuts = 1;
        }
        else {
            totalCuts += 1;
        }
      }
    }

    console.log(totalWeight + "Kg of Rabits and " + totalCuts + "cuts.")
  }
};

farmer.cut([{weight: 11}, {weight: 5}, {weight: 13}]); // Call the function

希望这会对你有所帮助。

Answer 4

Function.prototype.toString = function() {
 return Function.prototype.rabbitsWeight + "кг кроликов или " + Function.prototype.rabbitsCount + " штук";
}; 

Function.prototype.rabbitsWeight = 0;
Function.prototype.rabbitsCount = 0;

window.rabbitsCut = eval("new Function('rabbit', 'Function.prototype.rabbitsWeight += rabbit.weight; ++Function.prototype.rabbitsCount; return eval(window.rabbitsCut);');");

var cut = window.rabbitsCut;

console.log(cut({weight: 5})({weight: 4}));

JS中的一个函数，带参数传递

4 个答案: