From ccf76e430b7703db028966a845a966f50956f490 Mon Sep 17 00:00:00 2001
From: xue <>
Date: Mon, 5 Dec 2005 01:00:16 +0000
Subject:

---
 framework/Web/Javascripts/prototype/enumerable.js | 183 ++++++++++++++++++++++
 1 file changed, 183 insertions(+)
 create mode 100644 framework/Web/Javascripts/prototype/enumerable.js

(limited to 'framework/Web/Javascripts/prototype/enumerable.js')

diff --git a/framework/Web/Javascripts/prototype/enumerable.js b/framework/Web/Javascripts/prototype/enumerable.js
new file mode 100644
index 00000000..edeb297b
--- /dev/null
+++ b/framework/Web/Javascripts/prototype/enumerable.js
@@ -0,0 +1,183 @@
+var $break    = new Object();
+var $continue = new Object();
+
+var Enumerable = {
+  each: function(iterator) {
+    var index = 0;
+    try {
+      this._each(function(value) {
+        try {
+          iterator(value, index++);
+        } catch (e) {
+          if (e != $continue) throw e;
+        }
+      });
+    } catch (e) {
+      if (e != $break) throw e;
+    }
+  },
+  
+  all: function(iterator) {
+    var result = true;
+    this.each(function(value, index) {
+      if (!(result &= (iterator || Prototype.K)(value, index))) 
+        throw $break;
+    });
+    return result;
+  },
+  
+  any: function(iterator) {
+    var result = true;
+    this.each(function(value, index) {
+      if (result &= (iterator || Prototype.K)(value, index)) 
+        throw $break;
+    });
+    return result;
+  },
+  
+  collect: function(iterator) {
+    var results = [];
+    this.each(function(value, index) {
+      results.push(iterator(value, index));
+    });
+    return results;
+  },
+  
+  detect: function (iterator) {
+    var result;
+    this.each(function(value, index) {
+      if (iterator(value, index)) {
+        result = value;
+        throw $break;
+      }
+    });
+    return result;
+  },
+  
+  findAll: function(iterator) {
+    var results = [];
+    this.each(function(value, index) {
+      if (iterator(value, index))
+        results.push(value);
+    });
+    return results;
+  },
+  
+  grep: function(pattern, iterator) {
+    var results = [];
+    this.each(function(value, index) {
+      var stringValue = value.toString();
+      if (stringValue.match(pattern))
+        results.push((iterator || Prototype.K)(value, index));
+    })
+    return results;
+  },
+  
+  include: function(object) {
+    var found = false;
+    this.each(function(value) {
+      if (value == object) {
+        found = true;
+        throw $break;
+      }
+    });
+    return found;
+  },
+  
+  inject: function(memo, iterator) {
+    this.each(function(value, index) {
+      memo = iterator(memo, value, index);
+    });
+    return memo;
+  },
+  
+  invoke: function(method) {
+    var args = $A(arguments).slice(1);
+    return this.collect(function(value) {
+      return value[method].apply(value, args);
+    });
+  },
+  
+  max: function(iterator) {
+    var result;
+    this.each(function(value, index) {
+      value = (iterator || Prototype.K)(value, index);
+      if (value >= (result || value))
+        result = value;
+    });
+    return result;
+  },
+  
+  min: function(iterator) {
+    var result;
+    this.each(function(value, index) {
+      value = (iterator || Prototype.K)(value, index);
+      if (value <= (result || value))
+        result = value;
+    });
+    return result;
+  },
+  
+  partition: function(iterator) {
+    var trues = [], falses = [];
+    this.each(function(value, index) {
+      ((iterator || Prototype.K)(value, index) ? 
+        trues : falses).push(value);
+    });
+    return [trues, falses];
+  },
+  
+  pluck: function(property) {
+    var results = [];
+    this.each(function(value, index) {
+      results.push(value[property]);
+    });
+    return results;
+  },
+  
+  reject: function(iterator) {
+    var results = [];
+    this.each(function(value, index) {
+      if (!iterator(value, index))
+        results.push(value);
+    });
+    return results;
+  },
+  
+  sortBy: function(iterator) {
+    return this.collect(function(value, index) {
+      return {value: value, criteria: iterator(value, index)};
+    }).sort(function(left, right) {
+      var a = left.criteria, b = right.criteria;
+      return a < b ? -1 : a > b ? 1 : 0;
+    }).pluck('value');
+  },
+  
+  toArray: function() {
+    return this.collect(Prototype.K);
+  },
+  
+  zip: function() {
+    var iterator = Prototype.K, args = $A(arguments);
+    if (typeof args.last() == 'function')
+      iterator = args.pop();
+
+    var collections = [this].concat(args).map($A);
+    return this.map(function(value, index) {
+      iterator(value = collections.pluck(index));
+      return value;
+    });
+  },
+  
+  inspect: function() {
+    return '#<Enumerable:' + this.toArray().inspect() + '>';
+  }
+}
+
+Object.extend(Enumerable, {
+  map:     Enumerable.collect,
+  find:    Enumerable.detect,
+  select:  Enumerable.findAll,
+  member:  Enumerable.include,
+  entries: Enumerable.toArray
+});
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