forked from M3-Academy/challenge-algorithms-v2.0
77 lines
1.8 KiB
JavaScript
77 lines
1.8 KiB
JavaScript
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/**
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* class Namespace
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*
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* Simple object for storing attributes. Implements equality by attribute names
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* and values, and provides a simple string representation.
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*
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* See also [original guide][1]
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*
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* [1]:http://docs.python.org/dev/library/argparse.html#the-namespace-object
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**/
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'use strict';
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var $$ = require('./utils');
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/**
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* new Namespace(options)
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* - options(object): predefined propertis for result object
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*
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**/
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var Namespace = module.exports = function Namespace(options) {
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$$.extend(this, options);
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};
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/**
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* Namespace#isset(key) -> Boolean
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* - key (string|number): property name
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*
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* Tells whenever `namespace` contains given `key` or not.
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**/
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Namespace.prototype.isset = function (key) {
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return $$.has(this, key);
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};
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/**
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* Namespace#set(key, value) -> self
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* -key (string|number|object): propery name
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* -value (mixed): new property value
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*
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* Set the property named key with value.
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* If key object then set all key properties to namespace object
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**/
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Namespace.prototype.set = function (key, value) {
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if (typeof (key) === 'object') {
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$$.extend(this, key);
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} else {
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this[key] = value;
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}
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return this;
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};
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/**
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* Namespace#get(key, defaultValue) -> mixed
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* - key (string|number): property name
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* - defaultValue (mixed): default value
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*
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* Return the property key or defaulValue if not set
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**/
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Namespace.prototype.get = function (key, defaultValue) {
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return !this[key] ? defaultValue : this[key];
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};
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/**
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* Namespace#unset(key, defaultValue) -> mixed
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* - key (string|number): property name
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* - defaultValue (mixed): default value
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*
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* Return data[key](and delete it) or defaultValue
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**/
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Namespace.prototype.unset = function (key, defaultValue) {
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var value = this[key];
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if (value !== null) {
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delete this[key];
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return value;
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}
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return defaultValue;
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};
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