ix
Version:
The Interactive Extensions for JavaScript
50 lines (48 loc) • 1.71 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.scanRight = exports.ScanRightIterable = void 0;
const iterablex_js_1 = require("../iterablex.js");
const toarray_js_1 = require("../toarray.js");
/** @ignore */
class ScanRightIterable extends iterablex_js_1.IterableX {
constructor(source, options) {
super();
this._source = source;
this._fn = options['callback'];
this._hasSeed = options.hasOwnProperty('seed');
this._seed = options['seed'];
}
*[Symbol.iterator]() {
let hasValue = false;
let acc = this._seed;
const source = (0, toarray_js_1.toArray)(this._source);
for (let offset = source.length - 1; offset >= 0; offset--) {
const item = source[offset];
if (hasValue || (hasValue = this._hasSeed)) {
acc = this._fn(acc, item, offset);
yield acc;
}
else {
acc = item;
hasValue = true;
}
}
}
}
exports.ScanRightIterable = ScanRightIterable;
function scanRight(optionsOrAccumulator, seed) {
const options =
// eslint-disable-next-line no-nested-ternary
typeof optionsOrAccumulator === 'function'
? arguments.length > 1
? // prettier-ignore
{ 'callback': optionsOrAccumulator, 'seed': seed }
: // prettier-ignore
{ 'callback': optionsOrAccumulator }
: optionsOrAccumulator;
return function scanRightOperatorFunction(source) {
return new ScanRightIterable(source, options);
};
}
exports.scanRight = scanRight;
//# sourceMappingURL=scanright.js.map