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Set.js
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233 lines (186 loc) · 4.3 KB
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var Class = require('../utils/Class');
// A Set is a collection of unique elements.
var Set = new Class({
initialize:
function Set (elements)
{
this.entries = [];
if (Array.isArray(elements))
{
for (var i = 0; i < elements.length; i++)
{
this.set(elements[i]);
}
}
},
set: function (value)
{
if (this.entries.indexOf(value) === -1)
{
this.entries.push(value);
}
return this;
},
get: function (property, value)
{
for (var i = 0; i < this.entries.length; i++)
{
var entry = this.entries[i];
if (entry[property] === value)
{
return entry;
}
}
},
getArray: function ()
{
return this.entries.slice(0);
},
delete: function (value)
{
var index = this.entries.indexOf(value);
if (index > -1)
{
this.entries.splice(index, 1);
}
return this;
},
dump: function ()
{
console.group('Set');
for (var i = 0; i < this.entries.length; i++)
{
var entry = this.entries[i];
console.log(entry);
}
console.groupEnd();
},
// For when you know this Set will be modified during the iteration
each: function (callback, callbackScope)
{
var i;
var temp = this.entries.slice();
var len = temp.length;
if (callbackScope)
{
for (i = 0; i < len; i++)
{
if (callback.call(callbackScope, temp[i], i) === false)
{
break;
}
}
}
else
{
for (i = 0; i < len; i++)
{
if (callback(temp[i], i) === false)
{
break;
}
}
}
return this;
},
// For when you absolutely know this Set won't be modified during the iteration
iterate: function (callback, callbackScope)
{
var i;
var len = this.entries.length;
if (callbackScope)
{
for (i = 0; i < len; i++)
{
if (callback.call(callbackScope, this.entries[i], i) === false)
{
break;
}
}
}
else
{
for (i = 0; i < len; i++)
{
if (callback(this.entries[i], i) === false)
{
break;
}
}
}
return this;
},
iterateLocal: function (callbackKey)
{
var i;
var args = [];
for (i = 1; i < arguments.length; i++)
{
args.push(arguments[i]);
}
var len = this.entries.length;
for (i = 0; i < len; i++)
{
var entry = this.entries[i];
entry[callbackKey].apply(entry, args);
}
return this;
},
clear: function ()
{
this.entries.length = 0;
return this;
},
contains: function (value)
{
return (this.entries.indexOf(value) > -1);
},
union: function (set)
{
var newSet = new Set();
set.values.forEach(function (value)
{
newSet.add(value);
});
this.entries.forEach(function (value)
{
newSet.add(value);
});
return newSet;
},
intersect: function (set)
{
var newSet = new Set();
this.entries.forEach(function (value)
{
if (set.contains(value))
{
newSet.add(value);
}
});
return newSet;
},
difference: function (set)
{
var newSet = new Set();
this.entries.forEach(function (value)
{
if (!set.contains(value))
{
newSet.add(value);
}
});
return newSet;
},
size: {
get: function ()
{
return this.entries.length;
},
set: function (value)
{
return this.entries.length = value;
}
}
});
module.exports = Set;