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qwen/nodejs/node_modules/argparse/lib/namespace.js

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