shineout/esm/utils/func.js

A components library for React

/**
 * from redux.compose https://github.com/reactjs/redux/blob/master/src/compose.js
 * Composes single-argument functions from right to left. The rightmost
 * function can take multiple arguments as it provides the signature for
 * the resulting composite function.
 *
 * @param {...Function} funcs The functions to compose.
 * @returns {Function} A function obtained by composing the argument functions
 * from right to left. For example, compose(f, g, h) is identical to doing
 * (...args) => f(g(h(...args))).
 */

export { compose } from "./compose";
export * from "./curry";
export function curry(f) {
  for (var _len = arguments.length, args = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
    args[_key - 1] = arguments[_key];
  }
  if (args.length >= f.length) {
    return f.apply(void 0, args);
  }
  return function () {
    for (var _len2 = arguments.length, next = new Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {
      next[_key2] = arguments[_key2];
    }
    return curry.apply(void 0, [f.bind.apply(f, [f].concat(args))].concat(next));
  };
}
export function empty(e) {
  e.preventDefault();
}
export function memoize(fn) {
  return function (key) {
    fn.cache = fn.cache || {};
    if (!(key in fn.cache)) {
      fn.cache[key] = fn(key);
    }
    return fn.cache[key];
  };
}
export function createFunc(func) {
  if (typeof func === 'function') return func;
  return function (data) {
    return func ? data[func] : data;
  };
}
export var throttle = function throttle(func, timer) {
  var that = {};
  var cleanTimer = function cleanTimer() {
    if (that.timer) {
      clearTimeout(that.timer);
      that.timer = null;
    }
  };
  if (!timer) return [func, cleanTimer];
  return [function () {
    for (var _len3 = arguments.length, args = new Array(_len3), _key3 = 0; _key3 < _len3; _key3++) {
      args[_key3] = arguments[_key3];
    }
    cleanTimer();
    that.timer = setTimeout(function () {
      func.apply(void 0, args);
    }, timer);
  }, cleanTimer];
};