[英]How i can compose that function with ramda?
我如何以 ramda 方式創建 addGreeting 函數?
我嘗試創建一個函數,但它認為這不是最佳解決方案。
const animal = {};
const addName = R.assoc('name');
const addGreeting = (transformString) => (animal) => {
return R.assoc('greeting', transformString(animal), animal);
};
const createAnimal =
R.pipe(
addName('Igor'),
addGreeting(animal => `Hello ${animal.name}`),
);
createAnimal(animal);
我希望用 ramda 編寫 addGreeting 函數。
UPD:我的解決方案
const addName = R.assoc('name');
const addGreeting =
(transformString) =>
R.converge(
R.merge,
[
R.applySpec({
greeting: transformString
}),
R.defaultTo({})
]
)
const createAnimal =
R.pipe(
addName('Igor'),
addGreeting(animal => `Hello ${animal.name}`),
);
createAnimal({});
你可以使用R.curry
創建addGreeting
和R.applySpec
來創建動物創建函數:
const { curry, applySpec, identity } = R const addGreeting = curry((transformString, name) => transformString(name)); const createAnimal = applySpec({ name: identity, greeting: addGreeting(name => `Hello ${name}`) }) console.log(createAnimal('Igor'));
<script src="https://cdnjs.cloudflare.com/ajax/libs/ramda/0.26.1/ramda.js"></script>
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