@newdash/newdash/.internal/createPartial.js

javascript/typescript utility library

"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
const CONSTANTS_1 = require("./CONSTANTS");
const createCtor_1 = __importDefault(require("./createCtor"));
const apply_1 = __importDefault(require("./apply"));
const root_1 = __importDefault(require("./root"));
/**
 * Creates a function that wraps `func` to invoke it with the `this` binding
 * of `thisArg` and `partials` prepended to the arguments it receives.
 *
 * @private
 * @param {Function} func The function to wrap.
 * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
 * @param {*} thisArg The `this` binding of `func`.
 * @param {Array} partials The arguments to prepend to those provided to
 *  the new function.
 * @returns {Function} Returns the new wrapped function.
 */
function createPartial(func, bitmask, thisArg, partials) {
    var isBind = bitmask & CONSTANTS_1.WRAP_BIND_FLAG, Ctor = (0, createCtor_1.default)(func);
    function wrapper() {
        var argsIndex = -1, argsLength = arguments.length, leftIndex = -1, leftLength = partials.length, args = Array(leftLength + argsLength), fn = (this && this !== root_1.default && this instanceof wrapper) ? Ctor : func;
        while (++leftIndex < leftLength) {
            args[leftIndex] = partials[leftIndex];
        }
        while (argsLength--) {
            args[leftIndex++] = arguments[++argsIndex];
        }
        return (0, apply_1.default)(fn, isBind ? thisArg : this, args);
    }
    return wrapper;
}
exports.default = createPartial;