js currying function All In One
js 实现 (5).add(3).minus(2) 功能
例： 5 + 3 - 2，结果为 6
https://stackoverflow.com/questions/36314/what-is-currying
1. normal function
function add (a, b) {
return a + b;
}
add(3, 4);
// 7
2. currying function
function add (a) {
return function (b) {
return a + b;
}
}
add(3)(4);
// 7
// OR
var add3 = add(3);
// f()
add3(4);
// 7
自适应参数长度的 curry 函数 ✅
https://javascript.info/currying-partials
function curry(func) {
return function curried(...args) {
if (args.length >= func.length) {
return func.apply(this, args);
} else {
return function(...args2) {
return curried.apply(this, args.concat(args2));
}
}
};
}
demos
const log = console.log;
function sum(a, b, c) {
return a + b + c;
}
const curriedSum = curry(sum);
log( curriedSum(1, 2, 3) );
// 6, still callable normally
log( curriedSum(1)(2,3) );
// 6, currying of 1st arg
log( curriedSum(1)(2)(3) );
// 6, full currying
refs
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