1.9 KiB
1.9 KiB
id, title, challengeType, forumTopicId, dashedName
id | title | challengeType | forumTopicId | dashedName |
---|---|---|---|---|
587d7b8d367417b2b2512b5b | 學習函數式編程 | 1 | 301233 | learn-about-functional-programming |
--description--
函數式編程是一種方案簡單、功能獨立、對作用域外沒有任何副作用的編程範式:INPUT -> PROCESS -> OUTPUT
。
函數式編程:
1)功能獨立——不依賴於程序的狀態(比如可能發生變化的全局變量);
2)純函數——同一個輸入永遠能得到同一個輸出;
3)有限的副作用——可以嚴格地限制函數外部對狀態的更改。
--instructions--
freeCodeCamp 的成員們愛喝茶。
在代碼編輯器中,已經爲你定義好了prepareTea
和getTea
函數。 調用 getTea
函數爲團隊準備 40 杯茶,並將它們存儲在 tea4TeamFCC
變量裏。
--hints--
tea4TeamFCC
變量裏應有 40 杯爲團隊準備的茶。
assert(tea4TeamFCC.length === 40);
tea4TeamFCC
變量裏應有幾杯 greenTea(綠茶)。
assert(tea4TeamFCC[0] === 'greenTea');
--seed--
--seed-contents--
// Function that returns a string representing a cup of green tea
const prepareTea = () => 'greenTea';
/*
Given a function (representing the tea type) and number of cups needed, the
following function returns an array of strings (each representing a cup of
a specific type of tea).
*/
const getTea = (numOfCups) => {
const teaCups = [];
for(let cups = 1; cups <= numOfCups; cups += 1) {
const teaCup = prepareTea();
teaCups.push(teaCup);
}
return teaCups;
};
// Only change code below this line
const tea4TeamFCC = null;
// Only change code above this line
--solutions--
const prepareTea = () => 'greenTea';
const getTea = (numOfCups) => {
const teaCups = [];
for(let cups = 1; cups <= numOfCups; cups += 1) {
const teaCup = prepareTea();
teaCups.push(teaCup);
}
return teaCups;
};
const tea4TeamFCC = getTea(40);