data-forge
Version:
JavaScript data transformation and analysis toolkit inspired by Pandas and LINQ.
199 lines • 6.77 kB
JavaScript
;
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;
return g = { next: verb(0), "throw": verb(1), "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 (_) try {
if (f = 1, y && (t = y[op[0] & 2 ? "return" : op[0] ? "throw" : "next"]) && !(t = t.call(y, op[1])).done) return t;
if (y = 0, t) op = [0, 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 __values = (this && this.__values) || function (o) {
var m = typeof Symbol === "function" && o[Symbol.iterator], i = 0;
if (m) return m.call(o);
return {
next: function () {
if (o && i >= o.length) o = void 0;
return { value: o && o[i++], done: !o };
}
};
};
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
// @ts-ignore
var typy_1 = __importDefault(require("typy"));
//
// Various shared utility functions.
//
function mapIterable(items, mapFn) {
var iterator, result;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
iterator = items[Symbol.iterator]();
_a.label = 1;
case 1:
if (!true) return [3 /*break*/, 3];
result = iterator.next();
if (result.done) {
return [3 /*break*/, 3];
}
return [4 /*yield*/, mapFn(result.value)];
case 2:
_a.sent();
return [3 /*break*/, 1];
case 3: return [2 /*return*/];
}
});
}
exports.mapIterable = mapIterable;
//
// Helper function to only return distinct items.
//
function makeDistinct(items, selector) {
var set = {};
var output = [];
try {
for (var items_1 = __values(items), items_1_1 = items_1.next(); !items_1_1.done; items_1_1 = items_1.next()) {
var item = items_1_1.value;
var key = selector && selector(item) || item;
if (!set[key]) {
// Haven't yet seen this key.
set[key] = true;
output.push(item);
}
}
}
catch (e_1_1) { e_1 = { error: e_1_1 }; }
finally {
try {
if (items_1_1 && !items_1_1.done && (_a = items_1.return)) _a.call(items_1);
}
finally { if (e_1) throw e_1.error; }
}
return output;
var e_1, _a;
}
exports.makeDistinct = makeDistinct;
//
// Helper function to map an array of objects.
//
function toMap(items, keySelector, valueSelector) {
var output = {};
try {
for (var items_2 = __values(items), items_2_1 = items_2.next(); !items_2_1.done; items_2_1 = items_2.next()) {
var item = items_2_1.value;
var key = keySelector(item);
output[key] = valueSelector(item);
}
}
catch (e_2_1) { e_2 = { error: e_2_1 }; }
finally {
try {
if (items_2_1 && !items_2_1.done && (_a = items_2.return)) _a.call(items_2);
}
finally { if (e_2) throw e_2.error; }
}
return output;
var e_2, _a;
}
exports.toMap = toMap;
//
// Helper function to map an array of objects.
//
function toMap2(items, keySelector, valueSelector) {
var output = new Map();
try {
for (var items_3 = __values(items), items_3_1 = items_3.next(); !items_3_1.done; items_3_1 = items_3.next()) {
var item = items_3_1.value;
output.set(keySelector(item), valueSelector(item));
}
}
catch (e_3_1) { e_3 = { error: e_3_1 }; }
finally {
try {
if (items_3_1 && !items_3_1.done && (_a = items_3.return)) _a.call(items_3);
}
finally { if (e_3) throw e_3.error; }
}
return output;
var e_3, _a;
}
exports.toMap2 = toMap2;
//
// Determine the type of a value.
//
function determineType(value) {
if (value === undefined) {
return "undefined";
}
else if (isNumber(value)) {
return "number";
}
else if (isString(value)) {
return "string";
}
else if (value instanceof Date) {
return "date";
}
else if (isBoolean(value)) {
return "boolean";
}
else {
return "unsupported";
}
}
exports.determineType = determineType;
function isObject(v) {
return typy_1.default(v).isObject && !isDate(v);
}
exports.isObject = isObject;
function isFunction(v) {
return typy_1.default(v).isFunction;
}
exports.isFunction = isFunction;
function isString(v) {
return typy_1.default(v).isString;
}
exports.isString = isString;
function isDate(v) {
return Object.prototype.toString.call(v) === "[object Date]";
}
exports.isDate = isDate;
function isBoolean(v) {
return typy_1.default(v).isBoolean;
}
exports.isBoolean = isBoolean;
function isNumber(v) {
return typy_1.default(v).isNumber;
}
exports.isNumber = isNumber;
function isArray(v) {
return typy_1.default(v).isArray;
}
exports.isArray = isArray;
function isUndefined(v) {
return v === undefined;
}
exports.isUndefined = isUndefined;
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