optionull/dist/optionull.min.js

An implementation for the nullable design pattern in javascript

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"use strict";function _classCallCheck(e,t){if(!(e instanceof t))throw new TypeError("Cannot call a class as a function")}function _defineProperties(e,t){for(var n=0;n<t.length;n++){var i=t[n];i.enumerable=i.enumerable||!1,i.configurable=!0,"value"in i&&(i.writable=!0),Object.defineProperty(e,i.key,i)}}function _createClass(e,t,n){return t&&_defineProperties(e.prototype,t),n&&_defineProperties(e,n),e}module.exports=function(){function e(t){_classCallCheck(this,e),this.value=t}return _createClass(e,[{key:"get",value:function(){return this.value}},{key:"getOrElse",value:function(e){return this.isPresent()?this.value:"function"==typeof e?e():e}},{key:"isDefined",value:function(){return void 0!==this.value}},{key:"isNotNull",value:function(){return null!==this.value}},{key:"isPresent",value:function(){return!(!this.isDefined()||!this.isNotNull())}},{key:"ifPresent",value:function(e){this.isPresent()&&e(this.value)}},{key:"ifPresentOrElse",value:function(e,t){this.isPresent()?e(this.value):t()}},{key:"map",value:function(t){return this.isPresent()?e.ofNullable(t(this.value)):e.empty()}},{key:"flatMap",value:function(t){if(this.isPresent()){var n=t(this.value);return n instanceof e?n:e.ofNullable(n)}return e.empty()}},{key:"filter",value:function(t){if(this.isPresent()&&("function"==typeof t?t(this.value):t===this.value))return e.ofNullable(this.value);return e.empty()}}],[{key:"empty",value:function(){return new e}},{key:"ofNullable",value:function(t){return new e(t)}}]),e}();

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