This app provides monitoring and information features for the common freifunk user and the technical stuff of a freifunk community.
Code base is taken from a TUM Practical Course project and added here to see if Freifunk Altdorf can use it.
https://www.freifunk-altdorf.de
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
51 lines
1.1 KiB
51 lines
1.1 KiB
/** |
|
* Copyright (c) 2013-present, Facebook, Inc. |
|
* |
|
* This source code is licensed under the MIT license found in the |
|
* LICENSE file in the root directory of this source tree. |
|
* |
|
* |
|
*/ |
|
|
|
'use strict'; |
|
|
|
var Set = require('./Set'); |
|
|
|
var emptyFunction = require('./emptyFunction'); |
|
|
|
/** |
|
* Returns the count of distinct elements selected from an array. |
|
*/ |
|
function countDistinct(iter, selector) { |
|
selector = selector || emptyFunction.thatReturnsArgument; |
|
|
|
var set = new Set(); |
|
var _iteratorNormalCompletion = true; |
|
var _didIteratorError = false; |
|
var _iteratorError = undefined; |
|
|
|
try { |
|
for (var _iterator = iter[Symbol.iterator](), _step; !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = true) { |
|
var val = _step.value; |
|
|
|
set.add(selector(val)); |
|
} |
|
} catch (err) { |
|
_didIteratorError = true; |
|
_iteratorError = err; |
|
} finally { |
|
try { |
|
if (!_iteratorNormalCompletion && _iterator['return']) { |
|
_iterator['return'](); |
|
} |
|
} finally { |
|
if (_didIteratorError) { |
|
throw _iteratorError; |
|
} |
|
} |
|
} |
|
|
|
return set.size; |
|
} |
|
|
|
module.exports = countDistinct; |