Function count

docs/app/js/sanddance-app.js:87783–87790

(container)

var ERR_NOT_OBJECT = "count(): argument not an object";
var ERR_NOT_CONTAINER = "count(): argument not a container";
function count(container) {
    if (!isObject(container)) throw new Error(ERR_NOT_OBJECT);
    if (typeof container.count === "function") return container.count();
    if (Number.isFinite(container.size)) return container.size;
    if (Number.isFinite(container.length)) return container.length;
    if (isPlainObject(container)) return Object.keys(container).length;
    throw new Error(ERR_NOT_CONTAINER);
}
function isPlainObject(value) {
    return value !== null && (0, _typeofDefault.default)(value) === "object" && value.constructor === Object;
}