itertools-ts
Version:
Extended itertools port for TypeScript and JavaScript. Provides a huge set of functions for working with iterable collections (including async ones)
604 lines • 24.8 kB
JavaScript
"use strict";
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
var __generator = (this && this.__generator) || function (thisArg, body) {
var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g = Object.create((typeof Iterator === "function" ? Iterator : Object).prototype);
return g.next = verb(0), g["throw"] = verb(1), g["return"] = verb(2), typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
function verb(n) { return function (v) { return step([n, v]); }; }
function step(op) {
if (f) throw new TypeError("Generator is already executing.");
while (g && (g = 0, op[0] && (_ = 0)), _) try {
if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
if (y = 0, t) op = [op[0] & 2, t.value];
switch (op[0]) {
case 0: case 1: t = op; break;
case 4: _.label++; return { value: op[1], done: false };
case 5: _.label++; y = op[1]; op = [0]; continue;
case 7: op = _.ops.pop(); _.trys.pop(); continue;
default:
if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
if (t[2]) _.ops.pop();
_.trys.pop(); continue;
}
op = body.call(thisArg, _);
} catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
}
};
var __await = (this && this.__await) || function (v) { return this instanceof __await ? (this.v = v, this) : new __await(v); }
var __asyncGenerator = (this && this.__asyncGenerator) || function (thisArg, _arguments, generator) {
if (!Symbol.asyncIterator) throw new TypeError("Symbol.asyncIterator is not defined.");
var g = generator.apply(thisArg, _arguments || []), i, q = [];
return i = Object.create((typeof AsyncIterator === "function" ? AsyncIterator : Object).prototype), verb("next"), verb("throw"), verb("return", awaitReturn), i[Symbol.asyncIterator] = function () { return this; }, i;
function awaitReturn(f) { return function (v) { return Promise.resolve(v).then(f, reject); }; }
function verb(n, f) { if (g[n]) { i[n] = function (v) { return new Promise(function (a, b) { q.push([n, v, a, b]) > 1 || resume(n, v); }); }; if (f) i[n] = f(i[n]); } }
function resume(n, v) { try { step(g[n](v)); } catch (e) { settle(q[0][3], e); } }
function step(r) { r.value instanceof __await ? Promise.resolve(r.value.v).then(fulfill, reject) : settle(q[0][2], r); }
function fulfill(value) { resume("next", value); }
function reject(value) { resume("throw", value); }
function settle(f, v) { if (f(v), q.shift(), q.length) resume(q[0][0], q[0][1]); }
};
var __asyncValues = (this && this.__asyncValues) || function (o) {
if (!Symbol.asyncIterator) throw new TypeError("Symbol.asyncIterator is not defined.");
var m = o[Symbol.asyncIterator], i;
return m ? m.call(o) : (o = typeof __values === "function" ? __values(o) : o[Symbol.iterator](), i = {}, verb("next"), verb("throw"), verb("return"), i[Symbol.asyncIterator] = function () { return this; }, i);
function verb(n) { i[n] = o[n] && function (v) { return new Promise(function (resolve, reject) { v = o[n](v), settle(resolve, reject, v.done, v.value); }); }; }
function settle(resolve, reject, d, v) { Promise.resolve(v).then(function(v) { resolve({ value: v, done: d }); }, reject); }
};
var __values = (this && this.__values) || function(o) {
var s = typeof Symbol === "function" && Symbol.iterator, m = s && o[s], i = 0;
if (m) return m.call(o);
if (o && typeof o.length === "number") return {
next: function () {
if (o && i >= o.length) o = void 0;
return { value: o && o[i++], done: !o };
}
};
throw new TypeError(s ? "Object is not iterable." : "Symbol.iterator is not defined.");
};
var __read = (this && this.__read) || function (o, n) {
var m = typeof Symbol === "function" && o[Symbol.iterator];
if (!m) return o;
var i = m.call(o), r, ar = [], e;
try {
while ((n === void 0 || n-- > 0) && !(r = i.next()).done) ar.push(r.value);
}
catch (error) { e = { error: error }; }
finally {
try {
if (r && !r.done && (m = i["return"])) m.call(i);
}
finally { if (e) throw e.error; }
}
return ar;
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.toIterable = toIterable;
exports.toAsyncIterable = toAsyncIterable;
exports.toIterator = toIterator;
exports.toAsyncIterator = toAsyncIterator;
exports.toArray = toArray;
exports.toArrayAsync = toArrayAsync;
exports.toMap = toMap;
exports.toMapAsync = toMapAsync;
exports.toSet = toSet;
exports.toSetAsync = toSetAsync;
exports.tee = tee;
exports.teeAsync = teeAsync;
var exceptions_1 = require("./exceptions");
var summary_1 = require("./summary");
var tools_1 = require("./tools");
/**
* Converts collection or record to Iterable instance.
*
* If instance is already an iterable then just return it.
*
* @param collection
*/
function toIterable(collection) {
var _a;
if ((0, summary_1.isIterable)(collection)) {
return collection;
}
if ((0, summary_1.isIterator)(collection)) {
return _a = {},
_a[Symbol.iterator] = function () {
return collection;
},
_a;
}
if (typeof collection === "object" && collection !== null) {
return (function () {
var _a, _b, _c, _i, key;
return __generator(this, function (_d) {
switch (_d.label) {
case 0:
_a = collection;
_b = [];
for (_c in _a)
_b.push(_c);
_i = 0;
_d.label = 1;
case 1:
if (!(_i < _b.length)) return [3 /*break*/, 4];
_c = _b[_i];
if (!(_c in _a)) return [3 /*break*/, 3];
key = _c;
if (!Object.prototype.hasOwnProperty.call(collection, key)) return [3 /*break*/, 3];
return [4 /*yield*/, [
key,
collection[key],
]];
case 2:
_d.sent();
_d.label = 3;
case 3:
_i++;
return [3 /*break*/, 1];
case 4: return [2 /*return*/];
}
});
})();
}
throw new exceptions_1.InvalidArgumentError("Given collection is not iterable or iterator.");
}
/**
* Converts collection or record to AsyncIterable instance.
*
* If instance is already an async iterable then just return it.
*
* @param collection
*/
function toAsyncIterable(collection) {
var _a, _b;
if ((0, summary_1.isAsyncIterable)(collection)) {
return collection;
}
if ((0, summary_1.isIterator)(collection)) {
return _a = {},
_a[Symbol.asyncIterator] = function () {
return __asyncGenerator(this, arguments, function _a() {
var res;
return __generator(this, function (_b) {
switch (_b.label) {
case 0:
if (!true) return [3 /*break*/, 6];
return [4 /*yield*/, __await(collection.next())];
case 1:
res = _b.sent();
if (!res.done) return [3 /*break*/, 3];
return [4 /*yield*/, __await(void 0)];
case 2: return [2 /*return*/, _b.sent()];
case 3: return [4 /*yield*/, __await(res.value)];
case 4: return [4 /*yield*/, _b.sent()];
case 5:
_b.sent();
return [3 /*break*/, 0];
case 6: return [2 /*return*/];
}
});
});
},
_a;
}
if (typeof collection === "object" && collection !== null) {
collection = toIterable(collection);
}
if ((0, summary_1.isIterable)(collection)) {
return _b = {},
_b[Symbol.asyncIterator] = function () {
return __asyncGenerator(this, arguments, function _a() {
var _b, _c, value, e_1_1;
var e_1, _d;
return __generator(this, function (_e) {
switch (_e.label) {
case 0:
_e.trys.push([0, 6, 7, 8]);
_b = __values(collection), _c = _b.next();
_e.label = 1;
case 1:
if (!!_c.done) return [3 /*break*/, 5];
value = _c.value;
return [4 /*yield*/, __await(value)];
case 2: return [4 /*yield*/, _e.sent()];
case 3:
_e.sent();
_e.label = 4;
case 4:
_c = _b.next();
return [3 /*break*/, 1];
case 5: return [3 /*break*/, 8];
case 6:
e_1_1 = _e.sent();
e_1 = { error: e_1_1 };
return [3 /*break*/, 8];
case 7:
try {
if (_c && !_c.done && (_d = _b.return)) _d.call(_b);
}
finally { if (e_1) throw e_1.error; }
return [7 /*endfinally*/];
case 8: return [2 /*return*/];
}
});
});
},
_b;
}
throw new exceptions_1.InvalidArgumentError("Given collection is not async iterable or iterator.");
}
/**
* Converts collection to Iterator instance.
*
* If instance is already an iterator then just return it.
*
* @param collection
*/
function toIterator(collection) {
if ((0, summary_1.isIterator)(collection)) {
return collection;
}
if ((0, summary_1.isIterable)(collection)) {
return (function () {
var _a, _b, item, e_2_1;
var e_2, _c;
return __generator(this, function (_d) {
switch (_d.label) {
case 0:
_d.trys.push([0, 5, 6, 7]);
_a = __values(collection), _b = _a.next();
_d.label = 1;
case 1:
if (!!_b.done) return [3 /*break*/, 4];
item = _b.value;
return [4 /*yield*/, item];
case 2:
_d.sent();
_d.label = 3;
case 3:
_b = _a.next();
return [3 /*break*/, 1];
case 4: return [3 /*break*/, 7];
case 5:
e_2_1 = _d.sent();
e_2 = { error: e_2_1 };
return [3 /*break*/, 7];
case 6:
try {
if (_b && !_b.done && (_c = _a.return)) _c.call(_a);
}
finally { if (e_2) throw e_2.error; }
return [7 /*endfinally*/];
case 7: return [2 /*return*/];
}
});
})();
}
throw new exceptions_1.InvalidArgumentError("Given collection is not iterable or iterator.");
}
/**
* Converts collection to AsyncIterator instance.
*
* @param collection
*/
function toAsyncIterator(collection) {
if ((0, summary_1.isIterator)(collection) || (0, summary_1.isIterable)(collection)) {
collection = toAsyncIterable(collection);
}
if ((0, summary_1.isAsyncIterable)(collection)) {
return (function () {
return __asyncGenerator(this, arguments, function () {
var _a, _b, _c, item, e_3_1;
var _d, e_3, _e, _f;
return __generator(this, function (_g) {
switch (_g.label) {
case 0:
_g.trys.push([0, 7, 8, 13]);
_a = true, _b = __asyncValues(collection);
_g.label = 1;
case 1: return [4 /*yield*/, __await(_b.next())];
case 2:
if (!(_c = _g.sent(), _d = _c.done, !_d)) return [3 /*break*/, 6];
_f = _c.value;
_a = false;
item = _f;
return [4 /*yield*/, __await(item)];
case 3: return [4 /*yield*/, _g.sent()];
case 4:
_g.sent();
_g.label = 5;
case 5:
_a = true;
return [3 /*break*/, 1];
case 6: return [3 /*break*/, 13];
case 7:
e_3_1 = _g.sent();
e_3 = { error: e_3_1 };
return [3 /*break*/, 13];
case 8:
_g.trys.push([8, , 11, 12]);
if (!(!_a && !_d && (_e = _b.return))) return [3 /*break*/, 10];
return [4 /*yield*/, __await(_e.call(_b))];
case 9:
_g.sent();
_g.label = 10;
case 10: return [3 /*break*/, 12];
case 11:
if (e_3) throw e_3.error;
return [7 /*endfinally*/];
case 12: return [7 /*endfinally*/];
case 13: return [2 /*return*/];
}
});
});
})();
}
throw new exceptions_1.InvalidArgumentError("Given collection is not iterable or iterator.");
}
/**
* Converts given collection to array.
*
* @param collection
*/
function toArray(collection) {
var e_4, _a;
if (Array.isArray(collection)) {
return collection;
}
var result = [];
try {
for (var _b = __values(toIterable(collection)), _c = _b.next(); !_c.done; _c = _b.next()) {
var item = _c.value;
result.push(item);
}
}
catch (e_4_1) { e_4 = { error: e_4_1 }; }
finally {
try {
if (_c && !_c.done && (_a = _b.return)) _a.call(_b);
}
finally { if (e_4) throw e_4.error; }
}
return result;
}
/**
* Converts given async collection to array.
*
* @param collection
*/
function toArrayAsync(collection) {
return __awaiter(this, void 0, void 0, function () {
var result, _a, _b, _c, item, e_5_1;
var _d, e_5, _e, _f;
return __generator(this, function (_g) {
switch (_g.label) {
case 0:
if (Array.isArray(collection)) {
return [2 /*return*/, collection];
}
result = [];
_g.label = 1;
case 1:
_g.trys.push([1, 6, 7, 12]);
_a = true, _b = __asyncValues(toAsyncIterable(collection));
_g.label = 2;
case 2: return [4 /*yield*/, _b.next()];
case 3:
if (!(_c = _g.sent(), _d = _c.done, !_d)) return [3 /*break*/, 5];
_f = _c.value;
_a = false;
item = _f;
result.push(item);
_g.label = 4;
case 4:
_a = true;
return [3 /*break*/, 2];
case 5: return [3 /*break*/, 12];
case 6:
e_5_1 = _g.sent();
e_5 = { error: e_5_1 };
return [3 /*break*/, 12];
case 7:
_g.trys.push([7, , 10, 11]);
if (!(!_a && !_d && (_e = _b.return))) return [3 /*break*/, 9];
return [4 /*yield*/, _e.call(_b)];
case 8:
_g.sent();
_g.label = 9;
case 9: return [3 /*break*/, 11];
case 10:
if (e_5) throw e_5.error;
return [7 /*endfinally*/];
case 11: return [7 /*endfinally*/];
case 12: return [2 /*return*/, result];
}
});
});
}
/**
* Converts collection of key-value pairs to Map.
*
* @param pairs
*/
function toMap(pairs) {
var e_6, _a;
var result = new Map();
try {
for (var _b = __values(toIterable(pairs)), _c = _b.next(); !_c.done; _c = _b.next()) {
var _d = __read(_c.value, 2), key = _d[0], value = _d[1];
result.set(key, value);
}
}
catch (e_6_1) { e_6 = { error: e_6_1 }; }
finally {
try {
if (_c && !_c.done && (_a = _b.return)) _a.call(_b);
}
finally { if (e_6) throw e_6.error; }
}
return result;
}
/**
* Converts async collection of key-value pairs to Map.
*
* @param pairs
*/
function toMapAsync(pairs) {
return __awaiter(this, void 0, void 0, function () {
var result, _a, _b, _c, _d, key, value, e_7_1;
var _e, e_7, _f, _g;
return __generator(this, function (_h) {
switch (_h.label) {
case 0:
result = new Map();
_h.label = 1;
case 1:
_h.trys.push([1, 6, 7, 12]);
_a = true, _b = __asyncValues(toAsyncIterable(pairs));
_h.label = 2;
case 2: return [4 /*yield*/, _b.next()];
case 3:
if (!(_c = _h.sent(), _e = _c.done, !_e)) return [3 /*break*/, 5];
_g = _c.value;
_a = false;
_d = __read(_g, 2), key = _d[0], value = _d[1];
result.set(key, value);
_h.label = 4;
case 4:
_a = true;
return [3 /*break*/, 2];
case 5: return [3 /*break*/, 12];
case 6:
e_7_1 = _h.sent();
e_7 = { error: e_7_1 };
return [3 /*break*/, 12];
case 7:
_h.trys.push([7, , 10, 11]);
if (!(!_a && !_e && (_f = _b.return))) return [3 /*break*/, 9];
return [4 /*yield*/, _f.call(_b)];
case 8:
_h.sent();
_h.label = 9;
case 9: return [3 /*break*/, 11];
case 10:
if (e_7) throw e_7.error;
return [7 /*endfinally*/];
case 11: return [7 /*endfinally*/];
case 12: return [2 /*return*/, result];
}
});
});
}
/**
* Converts given collection to Set.
*
* @param collection
*/
function toSet(collection) {
var e_8, _a;
var result = new Set();
try {
for (var _b = __values(toIterable(collection)), _c = _b.next(); !_c.done; _c = _b.next()) {
var datum = _c.value;
result.add(datum);
}
}
catch (e_8_1) { e_8 = { error: e_8_1 }; }
finally {
try {
if (_c && !_c.done && (_a = _b.return)) _a.call(_b);
}
finally { if (e_8) throw e_8.error; }
}
return result;
}
/**
* Converts given async collection to Set.
*
* @param collection
*/
function toSetAsync(collection) {
return __awaiter(this, void 0, void 0, function () {
var result, _a, _b, _c, datum, e_9_1;
var _d, e_9, _e, _f;
return __generator(this, function (_g) {
switch (_g.label) {
case 0:
result = new Set();
_g.label = 1;
case 1:
_g.trys.push([1, 6, 7, 12]);
_a = true, _b = __asyncValues(toAsyncIterable(collection));
_g.label = 2;
case 2: return [4 /*yield*/, _b.next()];
case 3:
if (!(_c = _g.sent(), _d = _c.done, !_d)) return [3 /*break*/, 5];
_f = _c.value;
_a = false;
datum = _f;
result.add(datum);
_g.label = 4;
case 4:
_a = true;
return [3 /*break*/, 2];
case 5: return [3 /*break*/, 12];
case 6:
e_9_1 = _g.sent();
e_9 = { error: e_9_1 };
return [3 /*break*/, 12];
case 7:
_g.trys.push([7, , 10, 11]);
if (!(!_a && !_d && (_e = _b.return))) return [3 /*break*/, 9];
return [4 /*yield*/, _e.call(_b)];
case 8:
_g.sent();
_g.label = 9;
case 9: return [3 /*break*/, 11];
case 10:
if (e_9) throw e_9.error;
return [7 /*endfinally*/];
case 11: return [7 /*endfinally*/];
case 12: return [2 /*return*/, result];
}
});
});
}
/**
* Return several independent (duplicated) iterables from a single iterable.
*
* Once tee has been called to duplicate iterators, it is advisable to not use the original input iterator any further.
*
* Duplicating iterators can use up memory. Consider if tee is the right solution. For example, arrays and most
* iterators can be rewound and reiterated without need for duplication.
*
* @param collection
* @param count
*/
function tee(collection, count) {
return new tools_1.TeeIterator(toIterator(collection), count).getRelatedIterables();
}
/**
* Return several independent (duplicated) async iterables from a single async iterable.
*
* Once tee has been called to duplicate iterators, it is advisable to not use the original input iterator any further.
*
* Duplicating iterators can use up memory. Consider if tee is the right solution. For example, arrays and most
* iterators can be rewound and reiterated without need for duplication.
*
* @param collection
* @param count
*/
function teeAsync(collection, count) {
return new tools_1.AsyncTeeIterator(toAsyncIterator(collection), count).getRelatedIterables();
}
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