| /** PURE_IMPORTS_START _map PURE_IMPORTS_END */ |
| import { map } from './map'; |
| export function pluck() { |
| var properties = []; |
| for (var _i = 0; _i < arguments.length; _i++) { |
| properties[_i] = arguments[_i]; |
| } |
| var length = properties.length; |
| if (length === 0) { |
| throw new Error('list of properties cannot be empty.'); |
| } |
| return function (source) { return map(plucker(properties, length))(source); }; |
| } |
| function plucker(props, length) { |
| var mapper = function (x) { |
| var currentProp = x; |
| for (var i = 0; i < length; i++) { |
| var p = currentProp[props[i]]; |
| if (typeof p !== 'undefined') { |
| currentProp = p; |
| } |
| else { |
| return undefined; |
| } |
| } |
| return currentProp; |
| }; |
| return mapper; |
| } |
| //# sourceMappingURL=pluck.js.map |