add hw2

node_modules/vscode-jsonrpc/lib/common/is.js

@@ -0,0 +1,35 @@
+"use strict";
+/* --------------------------------------------------------------------------------------------
+ * Copyright (c) Microsoft Corporation. All rights reserved.
+ * Licensed under the MIT License. See License.txt in the project root for license information.
+ * ------------------------------------------------------------------------------------------ */
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.stringArray = exports.array = exports.func = exports.error = exports.number = exports.string = exports.boolean = void 0;
+function boolean(value) {
+    return value === true || value === false;
+}
+exports.boolean = boolean;
+function string(value) {
+    return typeof value === 'string' || value instanceof String;
+}
+exports.string = string;
+function number(value) {
+    return typeof value === 'number' || value instanceof Number;
+}
+exports.number = number;
+function error(value) {
+    return value instanceof Error;
+}
+exports.error = error;
+function func(value) {
+    return typeof value === 'function';
+}
+exports.func = func;
+function array(value) {
+    return Array.isArray(value);
+}
+exports.array = array;
+function stringArray(value) {
+    return array(value) && value.every(elem => string(elem));
+}
+exports.stringArray = stringArray;