Javascript 消除Ramda函数中的重复

如何删除

compareIndexes

中对

findIndexInO

的重复调用

const a = [
  {name: 'charlie', value: 1},
  {name: 'bravo', value: 7},
  {name: 'delta', value: 12},
  {name: 'alpha', value: 19},
]

const propEqName = propEq('name');
const findIndexInO = findIndex(__, a);
const compareIndexes = comparator((from, to) => lt(findIndexInO(propEqName(from)), findIndexInO(propEqName(to))))
const sortOnIndex = sort(compareIndexes);

const decideOrder = (...args) => sortOnIndex(args);

decideOrder('delta', 'charlie'); // ['charlie', 'delta']
decideOrder('bravo', 'alpha'); // ['bravo', 'alpha']
decideOrder('alpha', 'charlie'); // ['charlie', 'alpha']

怎么样

const order = addIndex(reduce)((ord, a, idx) => assoc(a.name, idx, ord), {}, a)
const decideOrder = unapply(sortBy(prop(__, order)))

?？因为您已经在函数中嵌入了

a

。作为一个额外的好处，如果这对您很重要，您也可以这样做：

decideOrder('delta', 'alpha', 'bravo') //=> ["bravo", "delta", "alpha"]

怎么样

const order = addIndex(reduce)((ord, a, idx) => assoc(a.name, idx, ord), {}, a)
const decideOrder = unapply(sortBy(prop(__, order)))

?？因为您已经在函数中嵌入了

a

。作为一个额外的好处，如果这对您很重要，您也可以这样做：

decideOrder('delta', 'alpha', 'bravo') //=> ["bravo", "delta", "alpha"]

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是否修改findIndexIn0以将结果存储在哈希中？或者甚至从数组中预生成索引散列？修改findIndexIn0以将结果存储在散列中？甚至从数组中预生成索引散列？