mirror of https://gitee.com/bigwinds/arangodb
79 lines
2.0 KiB
JavaScript
79 lines
2.0 KiB
JavaScript
/*global exports */
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////////////////////////////////////////////////////////////////////////////////
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/// @brief Check if something is something
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///
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/// @file
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///
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/// DISCLAIMER
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///
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/// Copyright 2010-2012 triagens GmbH, Cologne, Germany
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///
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/// Licensed under the Apache License, Version 2.0 (the "License");
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/// you may not use this file except in compliance with the License.
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/// You may obtain a copy of the License at
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///
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/// http://www.apache.org/licenses/LICENSE-2.0
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///
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/// Unless required by applicable law or agreed to in writing, software
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/// distributed under the License is distributed on an "AS IS" BASIS,
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/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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/// See the License for the specific language governing permissions and
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/// limitations under the License.
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///
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/// Copyright holder is triAGENS GmbH, Cologne, Germany
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///
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/// @author Dr. Frank Celler, Lucas Dohmen
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/// @author Copyright 2011-2012, triAGENS GmbH, Cologne, Germany
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////////////////////////////////////////////////////////////////////////////////
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// Check if a value is not undefined or null
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var existy = function (x) {
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"use strict";
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return x !== null && x !== undefined;
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};
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// Check if a value is undefined or null
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var notExisty = function (x) {
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"use strict";
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return !existy(x);
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};
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// Check if a value is existy and not false
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var truthy = function (x) {
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"use strict";
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return (x !== false) && existy(x);
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};
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// Check if a value is not truthy
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var falsy = function (x) {
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"use strict";
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return !truthy(x);
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};
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// is.object, is.noObject, is.array, is.noArray...
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[
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'Object',
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'Array',
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'Boolean',
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'Date',
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'Function',
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'Number',
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'String',
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'RegExp'
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].forEach(function(type) {
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"use strict";
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exports[type.toLowerCase()] = function(obj) {
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return Object.prototype.toString.call(obj) === '[object '+type+']';
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};
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exports["no" + type] = function(obj) {
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return Object.prototype.toString.call(obj) !== '[object '+type+']';
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};
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});
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exports.existy = existy;
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exports.notExisty = notExisty;
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exports.truthy = truthy;
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exports.falsy = falsy;
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